WO2023190497A1 - 抗菌剤 - Google Patents
抗菌剤 Download PDFInfo
- Publication number
- WO2023190497A1 WO2023190497A1 PCT/JP2023/012471 JP2023012471W WO2023190497A1 WO 2023190497 A1 WO2023190497 A1 WO 2023190497A1 JP 2023012471 W JP2023012471 W JP 2023012471W WO 2023190497 A1 WO2023190497 A1 WO 2023190497A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- group
- antibacterial
- blocking
- polyisocyanate
- isocyanate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/0838—Manufacture of polymers in the presence of non-reactive compounds
- C08G18/0842—Manufacture of polymers in the presence of non-reactive compounds in the presence of liquid diluents
- C08G18/0861—Manufacture of polymers in the presence of non-reactive compounds in the presence of liquid diluents in the presence of a dispersing phase for the polymers or a phase dispersed in the polymers
- C08G18/0866—Manufacture of polymers in the presence of non-reactive compounds in the presence of liquid diluents in the presence of a dispersing phase for the polymers or a phase dispersed in the polymers the dispersing or dispersed phase being an aqueous medium
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/56—1,2-Diazoles; Hydrogenated 1,2-diazoles
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/40—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides
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- A01N31/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic oxygen or sulfur compounds
- A01N31/02—Acyclic compounds
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- A—HUMAN NECESSITIES
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- A01N33/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic nitrogen compounds
- A01N33/02—Amines; Quaternary ammonium compounds
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- A—HUMAN NECESSITIES
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- A01N33/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic nitrogen compounds
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- A—HUMAN NECESSITIES
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- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
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- A—HUMAN NECESSITIES
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- A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
- A01P1/00—Disinfectants; Antimicrobial compounds or mixtures thereof
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- A—HUMAN NECESSITIES
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- A01P3/00—Fungicides
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- C08G18/244—Catalysts containing metal compounds of tin tin salts of carboxylic acids
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- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/2815—Monohydroxy compounds
- C08G18/283—Compounds containing ether groups, e.g. oxyalkylated monohydroxy compounds
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- C08G18/285—Nitrogen containing compounds
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- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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- C08G18/2875—Monohydroxy compounds containing tertiary amino groups
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- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
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- C08G18/705—Dispersions of isocyanates or isothiocyanates in a liquid medium
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- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
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- C08G18/757—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing at least two isocyanate or isothiocyanate groups linked to the cycloaliphatic ring by means of an aliphatic group
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- C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
- C08G18/792—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
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- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
Definitions
- the present invention relates to antibacterial agents.
- antibacterial agents Conventionally, compounds containing quaternary ammonium salts have been known as antibacterial agents. Furthermore, methods of using such antibacterial agents by fixing them on the surfaces of various articles are known.
- an article containing a resin component having a carboxyl group is brought into contact with a solution of an antibacterial agent containing an ethoxysilane quaternary ammonium salt to impart an ethoxysilane quaternary ammonium salt to the surface of the article.
- a method has been proposed (for example, see Patent Document 1).
- the antibacterial agent is fixed to the article by the reaction between the carboxyl group of the resin component having a carboxyl group and the ethoxysilane group of the ethoxysilane-based quaternary ammonium salt.
- Patent Document 1 it is necessary to select a resin component having a carboxyl group as the article (immobilized object), and an ethoxysilane-based quaternary ammonium salt is selected as the antibacterial agent (immobilized object). There is a need to. Therefore, there is a problem that the degree of freedom in selecting the article (object to be immobilized) is relatively low.
- the present invention is an antibacterial agent that has excellent antibacterial properties and allows a relatively high degree of freedom in selecting substances to be immobilized.
- the present invention [1] is an antibacterial agent containing a blocked isocyanate, and the blocked isocyanate comprises a polyisocyanate capping residue (A), an antibacterial-non-blocking capping group (B), and a non-bacterial-
- the blocking residue (A) of the polyisocyanate is obtained by blocking the isocyanate group of the polyisocyanate having a plurality of isocyanate groups, and the antibacterial-non-blocking In the group (B), at least a portion of the plurality of isocyanate groups are sealed in a non-renewable manner;
- the antimicrobial-nonblocking capping group (B) contains an antimicrobial agent containing a quaternary ammonium group.
- the blocked isocyanate further includes an antibacterial blocking group (D), and the antibacterial blocking group (D) is such that at least some of the plurality of isocyanate groups are
- the antibacterial blocking group (D) contains the antibacterial agent described in [1] above, which contains a tertiary ammonium salt.
- the blocked isocyanate further includes a hydrophilic group (E), and the hydrophilic group (E) is such that at least a part of the plurality of isocyanate groups is blocked in a non-renewable manner.
- the hydrophilic group (E) contains the antibacterial agent described in [1] or [2] above, which contains a polyoxyethylene group.
- the present invention [4] includes the antibacterial agent according to any one of [1] to [3] above, in which the blocked isocyanate has not been subjected to quaternization treatment.
- the blocked isocyanate is a reaction product of a raw material component, the raw material component has a plurality of isocyanate groups, and the polyisocyanate (a ), an antimicrobial-nonblocking capping agent (b) for reacting with at least a portion of the plurality of isocyanate groups to form the antimicrobial-nonblocking capping group (B), and a plurality of the isocyanate groups.
- non-antimicrobial-blocking encapsulant (c) for reacting with at least a portion of the group to form said non-antimicrobial-blocking encapsulant group (C);
- (b) contains the antibacterial agent according to any one of [1] to [4] above, which contains a quaternary ammonium group-containing compound.
- the present invention [6] is described in the above [5], wherein the proportion of the antibacterial non-blocking sealant (b) is 5 mol or more with respect to 100 mol of isocyanate groups of the polyisocyanate (a). Contains antibacterial agents.
- the present invention [7] includes the antibacterial agent according to the above [5] or [6], wherein the quaternary ammonium group-containing compound includes a trialkylalkanol ammonium compound.
- the raw material component further includes a tertiary amino group-containing compound (d1) for reacting with at least a part of the plurality of isocyanate groups to add a tertiary amino group;
- a tertiary amino group-containing compound (d1) for reacting with at least a part of the plurality of isocyanate groups to add a tertiary amino group;
- the antibacterial agent according to any one of [5] to [7] above, which contains an acid (d2) for neutralizing at least a part of the amino group and forming a tertiary ammonium salt.
- the present invention [9] provides any one of the above [5] to [8], wherein the raw material component further contains a hydrophilic compound (e), and the hydrophilic compound (e) contains a polyoxyethylene compound. Contains the antibacterial agent described in item 1.
- the present invention includes the antibacterial agent according to any one of [1] to [9] above, wherein the polyisocyanate contains an araliphatic polyisocyanate derivative.
- the antibacterial agent of the present invention contains blocked isocyanate.
- the blocked isocyanate comprises a polyisocyanate capping residue (A), an antibacterial non-blocking group (B), and a non-antibacterial blocking capping group (C).
- the antibacterial-nonblocking capping group (B) includes a quaternary ammonium group. Therefore, the antibacterial agent described above has excellent antibacterial properties and can be fixed in a resin with a relatively high degree of freedom.
- Antibacterial agent Blocked isocyanate
- the antibacterial agent contains blocked isocyanate.
- Blocked isocyanates are compounds with latent isocyanate groups.
- the latent isocyanate group is a functional group that can regenerate an isocyanate group (active isocyanate group) by deblocking.
- the blocked isocyanate comprises a polyisocyanate blocking residue (A), an antibacterial non-blocking group (B), and a non-antibacterial blocking blocking group (C). There is.
- the blocking residue (A) of the polyisocyanate is the main molecular skeleton of the blocked isocyanate.
- the capping residue (A) of the polyisocyanate is a residue formed by capping the isocyanate group of the polyisocyanate (described later). Note that sealing includes block sealing and non-block sealing.
- the antibacterial non-blocking group (B) is obtained by non-reproducibly sealing at least a portion of the isocyanate groups of a polyisocyanate (described later). That is, the antibacterial-nonblocking capping group (B) is a terminal capping group that cannot be deblocked.
- the antibacterial non-blocking group (B) has antibacterial properties. More specifically, the antimicrobial-nonblocking capping group (B) includes a quaternary ammonium group.
- a quaternary ammonium group is a cationic group in which four atoms other than hydrogen atoms are bonded to one nitrogen atom. Due to the quaternary ammonium group, a blocked isocyanate with excellent water dispersibility can be obtained.
- the quaternary ammonium group is, for example, neutralized by a counterion.
- Examples of the quaternary ammonium group include a trialkylammonium group.
- Examples of the trialkylammonium group include trialkylammonium groups in which the alkyl group has 1 to 8 carbon atoms, preferably trialkylammonium groups in which the alkyl group has 1 to 4 carbon atoms. More specific examples of the trialkylammonium group include a trimethylammonium group, a triethylammonium group, a dimethylethylammonium group, a methyldiethylammonium group, a tripropylammonium group, and a tributylammonium group. These can be used alone or in combination of two or more.
- the trialkylammonium group is a trimethylammonium group.
- Counter ions for the quaternary ammonium group include, for example, chloride ion, bromide ion, iodide ion, acetate ion, carbonate ion, phosphate ion, hydroxide ion, citrate ion, tartrate ion, bitartrate ion, and , lactic acid ion. These can be used alone or in combination of two or more.
- the counter ion includes a chloride ion, a bromide ion, and an acetate ion, and more preferably a chloride ion.
- the non-blocking capping group (B) is chemically bonded to the capping residue (A) of the polyisocyanate.
- the proportion of non-blocking capping groups (B) is based on the ratio of antibacterial properties, water dispersibility and storage stability to 100 moles of isocyanate groups of the polyisocyanate (described below) forming the capping residue (A). From this point of view, the amount is, for example, 5 mol or more, preferably 10 mol or more, more preferably 15 mol or more. In addition, from the viewpoint of durability, the proportion of the antibacterial non-blocking group (B) is, for example, 80% per 100 mol of isocyanate groups of the polyisocyanate (described later) forming the blocking residue (A). The amount is mol or less, preferably 60 mol or less, more preferably 40 mol or less, still more preferably 30 mol or less, particularly preferably 25 mol or less, from the viewpoint of water dispersibility and storage stability.
- the ratio of the antibacterial non-blocking group (B) is based on the total of 100 moles of the antibacterial non-blocking group (B) and the non-bacterial blocking group (C). From the viewpoints of properties, water dispersibility and storage stability, the amount is, for example, 5 mol or more, preferably 10 mol or more, more preferably 15 mol or more. Furthermore, the proportion of the antibacterial non-blocking group (B) is determined based on the total of 100 moles of the antibacterial non-blocking group (B) and the non-bacterial blocking group (C).
- the proportion of the antibacterial non-blocking group (B) is, for example, 2.0 parts by mass or more, preferably 2.0 parts by mass or more, based on 100 parts by mass of the polyisocyanate (described later) forming the capping residue (A). , 4.5 parts by mass or more.
- the proportion of the antibacterial non-blocking group (B) is, for example, 20.0 parts by mass or less, preferably 20.0 parts by mass or less, based on 100 parts by mass of the polyisocyanate (described later) forming the capping residue (A). , 15.0 parts by mass or less.
- Non-antibacterial - blocking blocking group (C) The non-antibacterial block-blocking group (C) is obtained by reproducibly sealing at least a portion of the isocyanate groups of polyisocyanate (described later). That is, the non-antibacterial-blocking group (C) is a latent isocyanate group (blocked isocyanate group) that can be deblocked.
- non-antibacterial blocking group (C) does not have antibacterial properties.
- examples of the non-antibacterial blocking group (C) include known latent isocyanate groups (blocked isocyanate groups).
- Non-antibacterial - The blocking blocking group (C) is chemically bonded to the blocking residue (A) of the polyisocyanate.
- the proportion of the non-antibacterial blocking blocking group (C) is, for example, 20 mol or more with respect to 100 mol of isocyanate groups of the polyisocyanate (described later) forming the blocking residue (A). , preferably 40 mol or more, more preferably 60 mol or more, still more preferably 70 mol or more, particularly preferably 75 mol or more, from the viewpoint of water dispersibility and storage stability.
- the ratio of the non-antibacterial blocking blocking group (C) to 100 moles of isocyanate groups of the polyisocyanate (described later) forming the blocking residue (A) is determined based on antibacterial properties, water dispersibility, and storage stability. From the viewpoint of properties, the amount is, for example, 95 mol or less, preferably 90 mol or less, more preferably 85 mol or less.
- the proportion of the non-antibacterial blocking blocking group (C) is determined based on the total 100 moles of the antibacterial non-blocking group (B) and the non-antibacterial blocking blocking group (C) From the viewpoint of properties, for example, 20 mol or more, preferably 40 mol or more, and from the viewpoint of water dispersibility and storage stability, more preferably 60 mol or more, still more preferably 70 mol or more, particularly preferably 75 mol or more. It is more than a mole.
- the ratio of the non-antibacterial blocking group (C) is based on the total of 100 moles of the antibacterial non-blocking group (B) and the non-antibacterial blocking group (C). From the viewpoints of properties, water dispersibility and storage stability, the amount is, for example, 95 mol or less, preferably 90 mol or less, more preferably 85 mol or less.
- the proportion of the non-antibacterial blocking blocking group (C) is, for example, 18.0 parts by mass or more, preferably 18.0 parts by mass or more, based on 100 parts by mass of the polyisocyanate (described later) forming the blocking residue (A). , 22.0 parts by mass or more.
- the proportion of the non-antibacterial blocking blocking group (C) is, for example, 33.0 parts by mass or less, preferably 33.0 parts by mass or less, based on 100 parts by mass of the polyisocyanate (described later) forming the blocking residue (A). , 30.0 parts by mass or less.
- Non-antibacterial - The blocking group (C) is deblocked (dissociated) by heating and the isocyanate group is regenerated.
- the dissociation temperature of the non-antibacterial blocking blocking group (C) is, for example, 50° C. or higher. Further, the dissociation temperature of the non-antibacterial blocking blocking group (C) is, for example, 150°C or lower, preferably 140°C or lower, and more preferably 130°C or lower.
- the blocked isocyanate can furthermore be provided with an antimicrobial-blocking capping group (D).
- Antibacterial properties - The block capping group (D) can improve the reactivity (curability) of the blocked isocyanate.
- the antibacterial-blocking group (D) is obtained by reproducibly sealing at least a portion of the isocyanate groups of polyisocyanate (described later). That is, the antibacterial-blocking group (D) is a latent isocyanate group (blocked isocyanate group) that can be deblocked.
- the antibacterial-blocking group (D) has antibacterial properties. More specifically, the antibacterial-blocking group (D) includes a tertiary ammonium salt.
- a tertiary ammonium salt is formed, for example, by neutralizing a tertiary amino group with an acid.
- a tertiary amino group is an amino group in which three atoms other than hydrogen atoms are single-bonded to one nitrogen atom.
- an amino group in which an atom other than a hydrogen atom is double or triple bonded to one nitrogen atom is not a tertiary amino group.
- the tertiary amino group may be included in a heterocyclic structure.
- Examples of the tertiary amino group include dialkylamino groups.
- Examples of the dialkylamino group include dialkylamino groups in which the alkyl group has 1 to 8 carbon atoms, preferably dialkylamino groups in which the alkyl group has 1 to 4 carbon atoms. More specifically, the dialkylamino group includes, for example, dimethylamino group, diethylamino group, dipropylamino group, diisopropylamino group, dibutylamino group, diisobutylamino group, di-s-butylamino group, and di-t -butylamino group. These can be used alone or in combination of two or more.
- the dialkylamino group is a dimethylamino group.
- acids that neutralize tertiary amino groups include organic acids and inorganic acids, and preferably organic acids.
- organic acids include carboxylic acids.
- Carboxylic acids include, for example, acetic acid, propionic acid and lactic acid. These can be used alone or in combination of two or more.
- the antibacterial-blocking blocking group (D) is chemically bonded to the blocking residue (A) of the polyisocyanate.
- the proportion of the blocking group (D) is determined from the viewpoints of antibacterial properties, water dispersibility, and storage stability with respect to 100 moles of isocyanate groups of the polyisocyanate (described later) forming the blocking residue (A). For example, the amount is 0.1 mol or more, preferably 1 mol or more.
- the proportion of the antibacterial blocking group (D) is determined based on the antibacterial property, water dispersibility, and storage stability based on 100 moles of isocyanate groups of the polyisocyanate (described later) forming the blocking residue (A). From this point of view, the amount is, for example, 20 mol or less, preferably 10 mol or less.
- the proportion of the antibacterial blocking blocking group (D) is, for example, 1 mol or more, preferably 5 mol or more, more preferably, It is 10 moles or more.
- the ratio of the antibacterial blocking group (D) to 100 moles of the antibacterial non-blocking group (B) is, for example, 40% from the viewpoint of antibacterial properties, water dispersibility and storage stability. It is less than 1 mole, preferably less than 35 mole, more preferably less than 30 mole.
- the proportion of the antibacterial blocking blocking group (D) is, for example, 0.1 part by mass or more, preferably, based on 100 parts by mass of the polyisocyanate (described later) forming the blocking residue (A). It is 1.3 parts by mass or more. Further, the proportion of the antibacterial blocking blocking group (D) is, for example, 15.0 parts by mass or less, preferably 15.0 parts by mass or less, based on 100 parts by mass of the polyisocyanate (described later) forming the blocking residue (A). It is 12.0 parts by mass or less.
- the antibacterial-blocking group (D) can be deblocked (dissociated) by heating and the isocyanate group can be regenerated. However, depending on the temperature conditions, the antibacterial-blocking capping group (D) may not be deblocked (dissociated) and may not regenerate the isocyanate groups.
- the dissociation temperature of the antibacterial blocking group (D) is preferably higher than the dissociation temperature of the non-antibacterial blocking group (C). If the dissociation temperature of the antibacterial blocking group (D) is higher than the dissociation temperature of the blocking group of the non-antibacterial blocking group (C), the dissociation of the antibacterial blocking group (D) is inhibited.
- the non-antibacterial-blocking capping group (C) can be preferentially dissociated while being suppressed. Therefore, when a resin (described later) is formed by dissociation of the non-antibacterial blocking group (C), the antibacterial blocking group (D) can be fixed to the resin.
- the dissociation temperature of the antibacterial blocking group (D) is, for example, 60°C or higher, preferably 100°C or higher. Further, the dissociation temperature of the non-antibacterial blocking blocking group (C) is, for example, 200°C or lower, preferably 180°C or lower, and more preferably 160°C or lower.
- the difference between the dissociation temperature of the non-antibacterial blocking group (C) and the dissociation temperature of the antibacterial blocking group (D) is, for example, 1°C or more, preferably 10°C or more. Further, the difference between the dissociation temperature of the non-antibacterial blocking group (C) and the dissociation temperature of the antibacterial blocking group (D) is, for example, 50°C or less, preferably 40°C or less. .
- the blocked isocyanate can further include a hydrophilic group (E).
- the hydrophilic group (E) can improve the water dispersibility of the blocked isocyanate.
- the hydrophilic group (E) is formed by sealing at least a portion of the isocyanate group of a polyisocyanate (described later) so that it cannot be reproduced. That is, the hydrophilic group (E) is an end-capping group that cannot be deblocked.
- hydrophilic group (E) examples include anionic groups and nonionic groups, preferably nonionic groups.
- nonionic groups include polyoxyethylene groups.
- the number of repeating oxyethylene units is, for example, 3 or more, preferably 5 or more. Further, the number of repeating oxyethylene units is, for example, 100 or less, preferably 50 or less.
- the hydrophilic group (E) is chemically bonded to the capping residue (A) of the polyisocyanate.
- the ratio of the hydrophilic group (E) to 100 moles of isocyanate groups of the polyisocyanate (described later) forming the sealing residue (A) is determined from the viewpoint of antibacterial properties, water dispersibility, and storage stability, for example, The amount is 0.1 mol or more, preferably 1 mol or more.
- the ratio of the hydrophilic group (E) to 100 moles of isocyanate groups of the polyisocyanate (described later) forming the sealing residue (A) is determined from the viewpoint of antibacterial properties, water dispersibility, and storage stability. For example, it is 20 mol or less, preferably 10 mol or less.
- the proportion of the hydrophilic group (E) is, for example, 1 mol or more, preferably 3 mol or more, more preferably 5 mol or more, per 100 mol of the antibacterial non-blocking group (B). be.
- the proportion of the hydrophilic group (E) is preferably, for example, 30 mol or less, from the viewpoint of antibacterial properties, water dispersibility, and storage stability, with respect to 100 mols of the antibacterial non-blocking group (B). is 25 mol or less, more preferably 20 mol or less.
- the proportion of the hydrophilic group (E) is, for example, 0.1 part by mass or more, preferably 1.0 part by mass, based on 100 parts by mass of the polyisocyanate (described later) forming the encapsulating residue (A). It is more than 100%. Further, the proportion of the hydrophilic group (E) is, for example, 65.0 parts by mass or less, preferably 32.0 parts by mass, based on 100 parts by mass of the polyisocyanate (described later) forming the capping residue (A). below.
- Raw material components Blocked isocyanate can be obtained as a reaction product of the following raw material components.
- the raw material components of the blocked isocyanate include, for example, polyisocyanate (a), an antibacterial non-blocking sealant (b), and a non-antibacterial blocking sealant (c).
- Polyisocyanate (a) is a raw material compound for forming the capping residue (A). Polyisocyanate (a) has multiple isocyanate groups. Examples of the polyisocyanate (a) include polyisocyanate monomers and polyisocyanate derivatives.
- polyisocyanate monomer examples include aliphatic polyisocyanates, aromatic polyisocyanates, and araliphatic polyisocyanates.
- aliphatic polyisocyanates examples include ethylene diisocyanate, trimethylene diisocyanate, 1,4-tetramethylene diisocyanate, 1,5-pentamethylene diisocyanate, 1,6-hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, and 2,6- Diisocyanate methyl caproate is mentioned. These can be used alone or in combination of two or more.
- examples of the aliphatic polyisocyanate monomers include alicyclic polyisocyanate monomers.
- examples of the alicyclic polyisocyanate monomer include 1,3-cyclopentane diisocyanate, 1,3-cyclopentene diisocyanate, 1,4-cyclohexane diisocyanate, 1,3-cyclohexane diisocyanate, 3-isocyanatomethyl-3,5 , 5-trimethylcyclohexyl isocyanate, methylene bis(cyclohexyl isocyanate), methyl-2,4-cyclohexane diisocyanate, methyl-2,6-cyclohexane diisocyanate, norbornane diisocyanate, and bis(isocyanatomethyl)cyclohexane. These can be used alone or in combination of two or more.
- aromatic polyisocyanates examples include tolylene diisocyanate, phenylene diisocyanate, 4,4'-diphenyl diisocyanate, 1,5-naphthalene diisocyanate, diphenylmethane diisocyanate, 4,4'-toluidine diisocyanate, and 4,4'- Diphenyl ether diisocyanate is mentioned. These can be used alone or in combination of two or more.
- aromatic aliphatic polyisocyanate examples include xylylene diisocyanate, tetramethylxylylene diisocyanate, and ⁇ , ⁇ '-diisocyanate-1,4-diethylbenzene. These can be used alone or in combination of two or more.
- the polyisocyanate derivative is derived from the polyisocyanate monomer described above.
- examples of polyisocyanate derivatives include isocyanurate modified products, iminooxadiazinedione modified products, triol adducts, allophanate modified products, biuret modified products, urea modified products, oxadiazinetrione modified products, carbodiimide modified products, and uretdione modified products. and uretonimine modified products. These can be used alone or in combination of two or more.
- Preferred examples of polyisocyanate derivatives include modified isocyanurates.
- Polyisocyanate (a) can be used alone or in combination of two or more types. From the viewpoint of curability (reactivity), polyisocyanate (a) preferably contains a polyisocyanate derivative, and more preferably consists of a polyisocyanate derivative.
- the polyisocyanate derivatives are preferably polyisocyanate derivatives derived from aliphatic polyisocyanates (hereinafter referred to as aliphatic polyisocyanate derivatives) and polyisocyanate derivatives derived from araliphatic polyisocyanates (hereinafter referred to as aliphatic polyisocyanate derivatives).
- aliphatic polyisocyanate derivatives polyisocyanate derivatives derived from araliphatic polyisocyanates
- the following examples include aromatic aliphatic polyisocyanate derivatives).
- aromatic aliphatic polyisocyanate derivatives are more preferable from the viewpoint of achieving a balance among antibacterial properties, storage stability, curability, and light resistance.
- the polyisocyanate (a) preferably contains an araliphatic polyisocyanate derivative.
- the aromatic aliphatic polyisocyanate derivative includes a derivative of xylylene diisocyanate, and more preferably an isocyanurate modified product of xylylene diisocyanate.
- the average number of isocyanate groups in the polyisocyanate (a) is, for example, 2 or more, preferably 2.5 or more. Further, the average number of isocyanate groups in the polyisocyanate (a) is, for example, 4 or less, preferably 3.5 or less.
- the isocyanate group content (NCO%) of the polyisocyanate (a) is, for example, 5% by mass or more, preferably 7% by mass or more. Further, the isocyanate group content (NCO%) of the polyisocyanate (a) is, for example, 30% by mass or less, preferably 25% by mass or less.
- the antibacterial non-blocking capping agent (b) is the starting compound for forming the antibacterial non-blocking capping group (B).
- the antimicrobial-nonblocking capping agent (b) reacts with at least a portion of the isocyanate groups of the polyisocyanate (a) to form the antimicrobial-nonblocking capping group (B).
- the antibacterial-nonblocking sealant (b) contains one or more active hydrogen groups in one molecule and one or more antibacterial groups in one molecule.
- the active hydrogen group is a functional group (non-blocking group) that irremovably bonds to the isocyanate group.
- Examples of the active hydrogen group include a hydroxyl group, an amino group, and a mercapto group, and preferably a hydroxyl group.
- the number of active hydrogen groups is preferably one per molecule of antimicrobial-nonblocking sealant (b).
- the antibacterial group is a functional group that exhibits antibacterial properties.
- examples of the antibacterial group include the above-mentioned quaternary ammonium group.
- the number of antimicrobial groups is preferably one per molecule of antimicrobial-nonblocking encapsulant (b).
- the antibacterial non-blocking sealant (b) includes a quaternary ammonium group-containing compound.
- a quaternary ammonium group-containing compound is, for example, a compound having both one active hydrogen group and one quaternary ammonium group in one molecule. More specifically, examples of the quaternary ammonium group-containing compound include trialkylalkanol ammonium compounds.
- trialkylalkanol ammonium compounds include choline chloride, choline bromide, choline iodide, choline acetate, choline carbonate, choline phosphate, choline hydroxide, choline citrate, choline tartrate, choline bitartrate, and choline lactate. can be mentioned. These can be used alone or in combination of two or more.
- choline bromide and choline acetate are preferred. Further, from the viewpoint of low cost, choline chloride is preferably used.
- the proportion of the antibacterial non-blocking sealant (b) is, for example, 5 to 100 moles of isocyanate groups of the polyisocyanate (a) from the viewpoint of antibacterial properties, water dispersibility, and storage stability.
- the amount is mol or more, preferably 10 mol or more, more preferably 15 mol or more.
- the proportion of the antibacterial non-blocking sealant (b) is, for example, 80 mol or less, preferably 60 mol or less, per 100 mol of isocyanate groups of the polyisocyanate (a). From the viewpoint of water dispersibility and storage stability, the amount is more preferably 40 mol or less, still more preferably 30 mol or less, particularly preferably 25 mol or less.
- the ratio of the antibacterial non-blocking sealant (b) to 100 parts by mass of the polyisocyanate (a) is determined from the viewpoint of antibacterial properties, water dispersibility, and storage stability, for example, 2
- the amount is .0 parts by mass or more, preferably 4.5 parts by mass or more, and more preferably 6.0 parts by mass or more.
- the proportion of the antibacterial non-blocking sealant (b) is, for example, 20.0 parts by mass based on 100 parts by mass of the polyisocyanate (a) from the viewpoint of antibacterial properties, water dispersibility, and storage stability.
- the amount is preferably 15.0 parts by mass or less, more preferably 12.5 parts by mass or less.
- the non-antibacterial-blocking capping agent (c) is a raw material compound for forming the non-antibacterial-blocking group (C).
- the non-antimicrobial-blocking capping agent (c) reacts with at least a portion of the isocyanate groups of the polyisocyanate (a) to form the non-antimicrobial-blocking capping group (C).
- the non-antibacterial-blocking encapsulant (c) is a blocking encapsulant containing one or more blocking groups in one molecule.
- the blocking group is a functional group that blocks and inactivates the isocyanate group of polyisocyanate (a).
- a latent isocyanate group is formed by the reaction between the blocking group and the isocyanate group.
- Examples of the blocking group include a guanidine group, an imidazole group, an alcohol group, a phenol group, an active methylene group, an amine group, an imine group, an oxime group, a carbamate group, a urea group, an acid amide group, an acid imide group, a triazole group, Examples include pyrazole groups, mercaptan groups, bisulfites, imidazoline groups, and pyrimidine groups. These can be used alone or in combination of two or more.
- the number of blocking groups is preferably one per molecule of antimicrobial-non-blocking sealant (b).
- non-antibacterial block sealant (c) includes known block sealants (excluding the tertiary amine-containing compound (d1) described below; the same applies hereinafter).
- the non-antibacterial block sealant (c) includes, for example, imidazole compounds, alcohol compounds, phenol compounds, active methylene compounds, primary to secondary amine compounds, imine compounds, Examples include oxime compounds, carbamate compounds, urea compounds, acid amide compounds, acid imide compounds, triazole compounds, pyrazole compounds, mercaptan compounds, bisulfites, imidazoline compounds, and pyrimidine compounds. It will be done.
- imidazole compounds include imidazole (IMZ), benzimidazole, 2-methylimidazole, 4-methylimidazole, 2-ethylimidazole, 2-isopropylimidazole, 2,4-dimethylimidazole, 2-ethyl-4-methylimidazole. , and 2-amine-imidazole.
- IMZ imidazole
- benzimidazole 2-methylimidazole
- 2-methylimidazole 4-methylimidazole
- 2-ethylimidazole 2-isopropylimidazole
- 2,4-dimethylimidazole 2,4-dimethylimidazole
- 2-ethyl-4-methylimidazole 2-amine-imidazole.
- alcohol compounds include methanol, ethanol, 2-propanol, n-butanol, s-butanol, 2-ethylhexyl alcohol, 1-octanol, 2-octanol, cyclohexyl alcohol, ethylene glycol, benzyl alcohol, 2,2 , 2-trifluoroethanol, 2,2,2-trichloroethanol, 2-(hydroxymethyl)furan, 2-methoxyethanol, methoxypropanol, 2-ethoxyethanol, n-propoxyethanol, 2-butoxyethanol, 2-ethoxy Ethoxyethanol, 2-ethoxybutoxyethanol, butoxyethoxyethanol, 2-butoxyethylethanol, 2-butoxyethoxyethanol, N,N-dibutyl-2-hydroxyacetamide, N-hydroxysuccinimide, N-morpholineethanol, 2,2- Examples include dimethyl-1,3-dioxolane-4-methanol, 3-oxazolidineethanol, 2-hydroxymethylpyridine, furfuryl alcohol,
- phenolic compounds include phenol, cresol, ethylphenol, n-propylphenol, isopropylphenol, n-butylphenol, s-butylphenol, t-butylphenol, n-hexylphenol, 2-ethylhexylphenol, n-octylphenol, n- Nonylphenol, di-n-propylphenol, diisopropylphenol, isopropylcresol, di-n-butylphenol, di-s-butylphenol, di-t-butylphenol, di-n-octylphenol, di-2-ethylhexylphenol, di-n- Nonylphenol, nitrophenol, bromophenol, chlorophenol, fluorophenol, dimethylphenol, styrenated phenol, methyl salicylate, methyl 4-hydroxybenzoate, benzyl 4-hydroxybenzoate, 2-ethylhexyl hydroxybenzoate, 4-[ (
- Examples of active methylene compounds include Meldrum's acid, dialkyl malonate, alkyl acetoacetate, 2-acetoacetoxyethyl methacrylate, acetylacetone, and ethyl cyanoacetate.
- Examples of dialkyl malonates include dimethyl malonate, diethyl malonate, di-n-butyl malonate, di-t-butyl malonate, di-2-ethylhexyl malonate, methyl n-butyl malonate, and ethyl n-butyl malonate.
- alkyl acetoacetate examples include methyl acetoacetate, ethyl acetoacetate, n-propyl acetoacetate, isopropyl acetoacetate, n-butyl acetoacetate, t-butyl acetoacetate, benzyl acetoacetate, and phenyl acetoacetate.
- Examples of primary to secondary amine compounds include dibutylamine, diphenylamine, aniline, N-methylaniline, carbazole, bis(2,2,6,6-tetramethylpiperidinyl)amine, di-n-propylamine, Diisopropylamine (DiPA), isopropylethylamine, 2,2,4-trimethylhexamethyleneamine, 2,2,5-trimethylhexamethyleneamine, N-isopropylcyclohexylamine, dicyclohexylamine, bis(3,5,5-trimethylcyclohexyl ) Amine, piperidine, 2,6-dimethylpiperidine, t-butylmethylamine, t-butylethylamine, t-butylpropylamine, t-butylbutylamine, t-butylbenzylamine, t-butylphenylamine, 2,2, 6-trimethylpiperidine, 2,2,6,6-tetramethylpiperidine, (di
- imine compounds examples include ethyleneimine, polyethyleneimine, and 1,4,5,6-tetrahydropyrimidine.
- oxime compounds include formaldoxime, acetaldoxime, acetoxime, methyl ethyl ketoxime (MEKO), cyclohexanone oxime, diacetylmonoxime, penzophenoxime, 2,2,6,6-tetramethylcyclohexanone oxime, diisopropyl Ketone oxime, methyl t-butyl ketone oxime, diisobutyl ketone oxime, methyl isobutyl ketone oxime, methyl isopropyl ketone oxime, methyl 2,4-dimethylpentyl ketone oxime, methyl 3-ethylheptyl ketone oxime, methyl isoamyl ketone oxime, n- Examples include amylketone oxime, 2,2,4,4-tetramethyl-1,3-cyclobutanedione monoxime, 4,4'-dimethoxybenzophenone oxime
- carbamic acid compounds examples include phenyl N-phenylcarbamate.
- urea-based compounds examples include urea, thiourea, and ethyleneurea.
- the acid amide compound is a lactam compound.
- acid amide compounds include acetanilide, N-methylacetamide, acetamide, ⁇ -caprolactam, ⁇ -valerolactam, ⁇ -butyrolactam, pyrrolidone, 2,5-piperazinedione, and laurolactam.
- acid imide compounds examples include succinimide, maleimide, and phthalimide.
- triazole compounds examples include 1,2,4-triazole and benzotriazole.
- Examples of pyrazole compounds include pyrazole, 3-methylpyrazole, 3-methyl-5-phenylpyrazole, 3,5-diphenylpyrazole, 4-benzyl-3,5-dimethylpyrazole, 4-nitro-3,5-dimethyl Examples include pyrazole, 4-bromo-3,5-dimethylpyrazole, and 3,5-dialkylpyrazole. 3,5-dialkylpyrazoles have no substituent at the 4-position of the pyrazole ring. Examples of the 3,5-dialkylpyrazole include 3,5-dimethylpyrazole (DMP), 3,5-diisopropylpyrazole, and 3,5-di-t-butylpyrazole.
- DMP 3,5-dimethylpyrazole
- DMP 3,5-diisopropylpyrazole
- 3,5-di-t-butylpyrazole 3,5-di-t-butylpyrazole.
- mercaptan compounds include butyl mercaptan, dodecyl mercaptan, and hexyl mercaptan.
- bisulfites examples include sodium bisulfite.
- imidazoline compounds examples include 2-methylimidazoline and 2-phenylimidazoline.
- pyrimidine compounds examples include 2-methyl-1,4,5,6-tetrahydropyrimidine.
- non-antibacterial blocking sealant (c) examples include, for example, benzoxazolone, isatoic anhydride, and tetrabutylphosphonium acetate.
- the non-antibacterial-blocking sealant (c) preferably comprises a pyrazole compound, more preferably consists of a pyrazole compound.
- the pyrazole compound includes 3,5-diphenylpyrazole and 3,5-dialkylpyrazole, more preferably 3,5-dialkylpyrazole, and even more preferably 3,5-dimethylpyrazole. Examples include pyrazole (DMP).
- the proportion of the non-antibacterial block sealing agent (c) is, for example, 20 mol or more, preferably 40 mol, from the viewpoint of durability, per 100 mol of isocyanate groups of the polyisocyanate (a).
- the amount is more preferably 60 mol or more, still more preferably 70 mol or more, particularly preferably 75 mol or more.
- the proportion of the non-antibacterial blocking sealant (c) is, for example, 95 mol or less based on 100 mol of isocyanate groups of the polyisocyanate (a) from the viewpoint of antibacterial properties, water dispersibility, and storage stability. , preferably 90 mol or less, more preferably 85 mol or less.
- the ratio of the non-antibacterial block sealant (c) to 100 parts by mass of the polyisocyanate (a) is determined from the viewpoint of antibacterial properties, water dispersibility and storage stability, for example, 18
- the amount is .0 parts by mass or more, preferably 22.0 parts by mass or more, more preferably 25.0 parts by mass or more.
- the proportion of the non-antibacterial blocking sealant (c) is, for example, 33.0 parts by mass based on 100 parts by mass of the polyisocyanate (a) from the viewpoint of antibacterial properties, water dispersibility, and storage stability.
- the amount is preferably 30.0 parts by mass or less, more preferably 27.0 parts by mass or less.
- the raw material components may further include a raw material compound (d) for forming the antibacterial blocking group (D) (hereinafter referred to as antibacterial blocking group forming raw material).
- the antibacterial-blocking group-forming raw material (d) contains, for example, a tertiary amino group-containing compound (d1) and an acid (d2).
- the tertiary amino group-containing compound (d1) is a raw material compound for adding a tertiary amino group to the blocked isocyanate.
- the tertiary amino group-containing compound (d1) reacts with at least a portion of the isocyanate groups of the polyisocyanate (a) to add a tertiary amino group to the polyisocyanate (a).
- the tertiary amino group-containing compound (d1) contains, for example, one or more of the above blocking groups in one molecule and one or more of the above tertiary amino groups in one molecule.
- the tertiary amino group-containing compound includes a guanidine compound represented by the following general formula (1).
- R 1 to R 5 represent a hydrocarbon group having 1 to 12 carbon atoms or a hydrogen atom.
- both R 1 and R 2 represent a hydrocarbon group having 1 to 12 carbon atoms
- both R 4 and R 5 represent a hydrocarbon group having 1 to 12 carbon atoms.
- R 1 and R 3 may be combined with each other to form a heterocycle.
- R 4 and R 1 may be combined with each other to form a heterocycle.
- R 5 and R 3 may be combined with each other to form a heterocycle.
- R 1 to R 5 may be the same or different from each other.
- R 1 to R 5 represent a hydrocarbon group having 1 to 12 carbon atoms or a hydrogen atom.
- both R 1 and R 2 represent a hydrocarbon group having 1 to 12 carbon atoms
- both R 4 and R 5 represent a hydrocarbon group having 1 to 12 carbon atoms.
- the guanidine compound represented by general formula (1) contains at least one tertiary amino group.
- Examples of the hydrocarbon group having 1 to 12 carbon atoms represented by R 1 to R 5 include an alkyl group having 1 to 12 carbon atoms and an aryl group having 6 to 12 carbon atoms.
- alkyl group having 1 to 12 carbon atoms examples include a chain alkyl group having 1 to 12 carbon atoms and a cyclic alkyl group having 3 to 12 carbon atoms.
- Examples of the chain alkyl group having 1 to 12 carbon atoms include linear or branched chain alkyl groups having 1 to 12 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert. -butyl, pentyl, isopentyl, tert-pentyl, hexyl, heptyl, octyl, nonyl, isononyl, decyl, undecyl, and dodecyl.
- linear or branched chain alkyl groups having 1 to 12 carbon atoms such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert. -butyl, pentyl, isopentyl, tert-pentyl, hexyl, heptyl, octyl
- Examples of the cyclic alkyl group having 3 to 12 carbon atoms include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, and cyclododecyl.
- aryl group having 6 to 12 carbon atoms examples include phenyl, tolyl, xylyl, naphthyl, azulenyl, and biphenyl.
- R 1 to R 5 may be the same or different from each other.
- R 1 and R 3 can be combined with each other to form a heterocycle.
- the heterocycle may be, for example, monocyclic or polycyclic in which a plurality of monocycles share one side.
- the heterocycle may be a conjugated heterocycle.
- R 4 and R 1 can be combined with each other to form a heterocycle.
- R 5 and R 3 can be combined with each other to form a heterocycle.
- the heterocycle formed from R 1 , R 3 , R 4 and R 5 may be polycyclic in which a plurality of monocycles share one side.
- the heterocycle may be a conjugated heterocycle. Note that when R 1 , R 3 , R 4 and R 5 form a heterocycle, R 2 preferably represents a hydrogen atom.
- a specific example of such a heterocyclic structure is a triazabicyclocyclic structure.
- R 1 to R 5 preferably represent a hydrocarbon group having 1 to 12 carbon atoms or a hydrogen atom, more preferably an alkyl group having 1 to 12 carbon atoms or a hydrogen atom. , more preferably a chain alkyl group having 1 to 12 carbon atoms or a hydrogen atom.
- both R 1 and R 2 represent a hydrocarbon group having 1 to 12 carbon atoms
- both R 4 and R 5 represent a hydrocarbon group having 1 to 12 carbon atoms.
- R 1 , R 2 , R 4 and R 5 represent a chain alkyl group having 1 to 12 carbon atoms, and R 3 represents a hydrogen atom.
- the guanidine compound represented by the above general formula (1) includes 3,3-dialkylguanidine, 1,1,3,3-tetraalkylguanidine, and 1,5,7-triazabicyclo[4 .4.0] deca-5-ene.
- guanidine compounds represented by the above general formula (1) can be used alone or in combination of two or more.
- the tertiary amino group-containing compound (d1) is not limited to the above-mentioned guanidine compound.
- examples of the tertiary amino group-containing compound (d1) include N-dimethylaminoethanol (DMAE), N-methyldiethanolamine (MDEA), N-methylpiperazine (MPZ), and N-methylhomo piperazine (MHPZ), 1,8-diazabicyclo[5.4.0]-7-undecene (DBU), N,N,N'-trimethylethylenediamine (TMEDA), and 1,5,7-triazabicyclo[ 4.4.0] deca-5-ene (TABD).
- DMAE N-dimethylaminoethanol
- MDEA N-methyldiethanolamine
- MPZ N-methylpiperazine
- MHPZ N-methylhomo piperazine
- DBU 1,8-diazabicyclo[5.4.0]-7-undecene
- TEDA N,N,N'-trimethylethylenediamine
- the tertiary amino group-containing compound (d1) can be used alone or in combination of two or more types.
- the tertiary amino group-containing compound (d1) is preferably a guanidine compound represented by the above general formula (1), more preferably a 1,1,3,3 -tetraalkylguanidine, more preferably 1,1,3,3-tetramethylguanidine (TMG).
- the ratio of the tertiary amino group-containing compound (d1) is, for example, 0.1 from the viewpoint of antibacterial properties, water dispersibility, and storage stability with respect to 100 moles of isocyanate groups of polyisocyanate (a).
- the amount is 1 mole or more, preferably 1 mole or more.
- the proportion of the tertiary amino group-containing compound (d1) is, for example, 20 mol or less, preferably, from the viewpoint of antibacterial properties, water dispersibility, and storage stability, with respect to 100 mol of isocyanate groups of the polyisocyanate (a). is 10 moles or less.
- the ratio of the tertiary amino group-containing compound (d1) to 100 parts by mass of the polyisocyanate (a) is, for example, 0.1 from the viewpoint of antibacterial properties, water dispersibility, and storage stability.
- the amount is at least 1.3 parts by mass, preferably 1.3 parts by mass or more, and more preferably 1.5 parts by mass or more.
- the proportion of the tertiary amino group-containing compound (d1) is, for example, 15.0 parts by mass or less, based on 100 parts by mass of the polyisocyanate (a), from the viewpoint of antibacterial properties, water dispersibility, and storage stability.
- it is 12.0 parts by mass or less, more preferably 10.0 parts by mass or less.
- the acid (d2) is a raw material compound for neutralizing at least a portion of the tertiary amino group to form a tertiary ammonium salt.
- the acid (d2) is not particularly limited as long as it can neutralize the above-mentioned tertiary amino group, but examples thereof include the acids mentioned above as the antibacterial-blocking group (D).
- the acid (d2) preferably includes acetic acid, propionic acid and lactic acid, more preferably acetic acid.
- the proportion of the acid (d2) is, for example, 0.5 equivalent or more, preferably 0.8 equivalent or more, relative to the tertiary amino group of the tertiary amino group-containing compound (d1). Further, the proportion of the acid (d2) is, for example, 5.0 equivalents or less, preferably 3.0 equivalents or less, per 100 moles of tertiary amino groups of the tertiary amino group-containing compound (d1).
- the raw material component can further include a hydrophilic compound (e) for forming the hydrophilic group (E).
- the hydrophilic compound (e) has an active hydrogen group and a hydrophilic group.
- examples of the hydrophilic compound (e) include nonionic hydrophilic compounds, preferably polyoxyethylene compounds.
- a polyoxyethylene compound has at least three consecutive oxyethylene groups.
- polyoxyethylene compound examples include polyoxyethylene group-containing polyols, polyoxyethylene group-containing polyamines, one-end-blocked polyoxyethylene glycol, and one-end-blocked polyoxyethylene diamine.
- the polyoxyethylene compounds can be used alone or in combination of two or more.
- the polyoxyethylene compound preferably contains one end-capped polyoxyethylene glycol, and more preferably contains monoalkoxypolyoxyethylene glycol.
- One end of the monoalkoxypolyoxyethylene glycol is capped with, for example, an alkyl group having 1 to 20 carbon atoms, preferably an alkyl group having 1 to 4 carbon atoms.
- a hydroxyl group is located at the other end of the monoalkoxypolyoxyethylene glycol.
- Examples of the monoalkoxypolyoxyethylene glycol include methoxypolyoxyethylene glycol (MeOPEG) and ethoxypolyoxyethylene glycol, preferably methoxypolyoxyethylene glycol.
- MeOPEG methoxypolyoxyethylene glycol
- ethoxypolyoxyethylene glycol preferably methoxypolyoxyethylene glycol.
- the number of repeating oxyethylene units is, for example, 3 or more, preferably 5 or more. Further, the number of repeating oxyethylene units is, for example, 100 or less, preferably 50 or less.
- the number average molecular weight of the polyoxyethylene compound is, for example, 200 or more, preferably 400 or more. Further, the number average molecular weight of the polyoxyethylene compound is, for example, 2,000 or less, preferably 1,500 or less. Note that the number average molecular weight of the polyoxyethylene compound can be measured by gel permeation chromatography.
- the proportion of the hydrophilic compound (e) is, for example, 0.1 mol or more, based on 100 mol of isocyanate groups of the polyisocyanate (a), from the viewpoints of antibacterial properties, water dispersibility, and storage stability. Preferably it is 1 mol or more. Further, the proportion of the hydrophilic compound (e) is, for example, 20 mol or less, preferably 10 mol or less, from the viewpoint of antibacterial properties, water dispersibility, and storage stability, per 100 mol of isocyanate groups of the polyisocyanate (a). Less than a mole.
- the proportion of the hydrophilic compound (e) is, for example, 0.1 part by mass or more based on 100 parts by mass of the polyisocyanate (a) from the viewpoint of antibacterial properties, water dispersibility, and storage stability. , preferably 1.0 parts by mass or more, more preferably 1.5 parts by mass or more.
- the proportion of the hydrophilic compound (e) is, for example, 65.0 parts by mass or less, preferably, from the viewpoint of antibacterial properties, water dispersibility, and storage stability, based on 100 parts by mass of the polyisocyanate (a). It is 32.0 parts by mass or less, more preferably 30.0 parts by mass or less.
- each of the above components may be reacted simultaneously, or each of the above components may be reacted sequentially.
- the polyisocyanate (a) and the antibacterial non-blocking sealant (b) are blended in the above ratio and allowed to react (primary reaction step).
- the reaction environment in the primary reaction step is, for example, an inert gas atmosphere.
- the inert gas include nitrogen gas and argon gas.
- the reaction pressure in the primary reaction step is, for example, pressurized conditions or atmospheric pressure conditions, preferably atmospheric pressure conditions.
- the reaction temperature in the primary reaction step is, for example, 40°C or higher, preferably 50°C or higher. Further, the reaction temperature in the primary reaction step is, for example, 100°C or lower, preferably 80°C or lower.
- the reaction time of the primary reaction step is, for example, 0.5 hours or more, preferably 1.0 hours or more. Further, the reaction time of the primary reaction step is, for example, 24 hours or less, preferably 12 hours or less.
- the progress of the reaction can be determined by, for example, employing infrared spectroscopy and confirming the disappearance or reduction of isocyanate groups. Further, the progress of the reaction can also be determined by, for example, measuring the isocyanate group content using a known titration method and confirming a decrease in the isocyanate group content.
- reaction product comprising an antibacterial non-blocking blocking group (B) and a free isocyanate group is obtained.
- the reaction environment of the secondary reaction step is, for example, an inert gas atmosphere.
- the inert gas include nitrogen gas and argon gas.
- the reaction pressure in the secondary reaction step is, for example, pressurized conditions or atmospheric pressure conditions, and preferably atmospheric pressure conditions.
- the reaction temperature in the secondary reaction step is, for example, 0°C or higher, preferably 20°C or higher. Further, the reaction temperature in the secondary reaction step is, for example, 80°C or lower, preferably 60°C or lower.
- the reaction time of the secondary reaction step is, for example, 0.5 hours or more, preferably 1.0 hours or more. Further, the reaction time of the secondary reaction step is, for example, 24 hours or less, preferably 12 hours or less.
- the completion of the reaction can be determined by, for example, employing infrared spectroscopy and confirming the disappearance or reduction of isocyanate groups.
- the free isocyanate groups of the primary reaction product are reproducibly capped by the non-antibacterial-blocking capping agent (c).
- a non-antibacterial-blocking capping group (C) is formed.
- the isocyanate groups of the polyisocyanate (a) are treated by the antibacterial non-blocking group (B) and the non-antibacterial blocking group (C). sealed. As a result, a capping residue (A) of polyisocyanate is formed.
- a blocked isocyanate (A) comprising a polyisocyanate blocking residue (A), an antibacterial non-blocking group (B), and a non-antibacterial blocking blocking group (C) is prepared. Secondary reaction product) is obtained.
- Such a blocked isocyanate comprises a polyisocyanate blocking residue (A), an antibacterial non-blocking group (B), and a non-antibacterial blocking blocking group (C). And the antibacterial-nonblocking capping group (B) includes a quaternary ammonium group. Therefore, the above-mentioned blocked isocyanate has excellent antibacterial properties and can be fixed in a resin with a relatively high degree of freedom.
- an antibacterial non-blocking group (B) is formed by reacting the polyisocyanate (a) with the antibacterial non-blocking sealant (b).
- the antibacterial non-blocking capping group (B) may be formed without using the antibacterial non-blocking capping agent (b).
- an antibacterial-nonblocking blocking group can be obtained.
- (B) may also be formed.
- a tertiary amine-containing compound (b1) may be blended in place of the antibacterial non-blocking sealant (b) (for example, a quaternary ammonium group-containing compound) in the above primary reaction step. , these are reacted (primary reaction step).
- tertiary amine-containing compound (b1) examples include the tertiary amine-containing compounds described above as antibacterial-blocking group forming raw materials. These can be used alone or in combination of two or more.
- the blending ratio of the tertiary amine-containing compound (d1) is based on the blending ratio of the antibacterial non-blocking sealant (b) described above.
- the reaction conditions in the primary reaction step are the same as above. Thereby, a reaction product (primary reaction product) comprising a tertiary amino group and a free isocyanate group is obtained.
- reaction product comprising a polyisocyanate blocking residue (A), a non-antibacterial blocking blocking group (C), and a tertiary amino group is obtained.
- the tertiary amino group of the secondary reaction product is quaternized by a known method (quaternization treatment step).
- a tertiary amino group and a quaternization agent (b2) are reacted.
- the quaternizing agent (b2) include methyl chloride, allyl chloride, benzyl chloride, dimethyl sulfate, dimethyl carbonate, propylene oxide, butylene oxide, styrene oxide, epibromohydrin, ethylene chlorohydrin, and 3-chloro- Examples include 1,2-propanediol, 3-chloro-2-hydroxypropyltrimethylammonium chloride, glycidyltrimethylammonium chloride, glycidol, butyl glycidyl ether, allyl glycidyl ether, and glycidyl methacrylate. These can be used alone or in combination of two or more.
- Preferable examples of the quaternizing agent (b2) include methyl chloride.
- the proportion of the quaternizing agent (b2) is, for example, 0.5 equivalent or more, preferably 0.8 equivalent or more, relative to the tertiary amino group of the tertiary amino group-containing compound (b1). Further, the proportion of the quaternizing agent (b2) is, for example, 5.0 equivalents or less, preferably 3.0 equivalents or less, per 100 moles of tertiary amino groups of the tertiary amino group-containing compound (b1). be.
- the reaction environment of the quaternization treatment step is, for example, an inert gas atmosphere.
- the inert gas include nitrogen gas and argon gas.
- the reaction pressure in the quaternization treatment step is, for example, pressurized conditions or atmospheric pressure conditions, and preferably atmospheric pressure conditions.
- the reaction temperature in the quaternization treatment step is, for example, 0°C or higher, preferably 20°C or higher. Further, the reaction temperature in the quaternization treatment step is, for example, 80°C or lower, preferably 60°C or lower.
- the reaction time of the quaternization treatment step is, for example, 0.5 hours or more, preferably 1.0 hours or more. Further, the reaction time of the quaternization treatment step is, for example, 24 hours or less, preferably 12 hours or less.
- the tertiary amino group is quaternized, and a quaternary ammonium group (antibacterial non-blocking group (B)) is formed.
- a blocked isocyanate (quaternized product) comprising a polyisocyanate blocking residue (A), an antibacterial non-blocking group (B), and a non-antibacterial blocking blocking group (C) was obtained. ) is obtained.
- Such a quaternized product also contains a polyisocyanate blocking residue (A), an antibacterial non-blocking group (B), and a non-antibacterial blocking blocking group (C). Be prepared. And the antibacterial-nonblocking capping group (B) includes a quaternary ammonium group. Therefore, the above-mentioned blocked isocyanate has excellent antibacterial properties and can be fixed in a resin with a relatively high degree of freedom.
- block isocyanates that have not been quaternized are preferred, and more specifically, polyisocyanate (a) and antibacterial non-blocking sealants ( b) and a non-antibacterial-blocking sealant (c).
- the raw material component can contain the antibacterial-blocking group-forming raw material (d).
- the tertiary amino group-containing compound (d1) is blended in the above ratio in the first reaction step and/or the second reaction step, if necessary.
- the tertiary amino group-containing compound (d1) is blended with the non-antibacterial blocking sealant (c) in the above ratio.
- the secondary reaction step when the tertiary amino group-containing compound (d1) is blended, at least a part of the free isocyanate groups of the primary reaction product can be regenerated by the non-antibacterial blocking agent (c). sealed. Furthermore, at least a portion of the free isocyanate groups of the primary reaction product are blocked by the tertiary amino group-containing compound (d1).
- non-antibacterial block-blocking group (C) derived from the non-antibacterial block-blocking agent (c) and a tertiary amino group derived from the tertiary amino group-containing compound (d1).
- a secondary reaction product is obtained.
- the acid (d2) is blended with the secondary reaction product in the above-mentioned ratio, and these are reacted. Thereby, at least a portion of the tertiary amino groups are neutralized with the acid to form a tertiary ammonium salt (neutralization step).
- the reaction environment in the neutralization step is, for example, an inert gas atmosphere.
- the inert gas include nitrogen gas and argon gas.
- the reaction pressure in the neutralization step is, for example, pressurized conditions or atmospheric pressure conditions, and preferably atmospheric pressure conditions.
- the reaction temperature in the neutralization step is, for example, 0°C or higher, preferably 20°C or higher. Further, the reaction temperature in the neutralization step is, for example, 80°C or lower, preferably 60°C or lower.
- the reaction time of the neutralization step is, for example, 0.5 hours or more, preferably 1.0 hours or more. Further, the reaction time of the neutralization step is, for example, 24 hours or less, preferably 12 hours or less.
- the tertiary amino group is neutralized by the acid, and an antibacterial-blocking group (D) containing a tertiary ammonium salt is formed.
- a polyisocyanate capping residue (A), an antibacterial non-blocking capping group (B), a non-bacterial blocking blocking group (C), and an antibacterial blocking capping group (C) are combined.
- a blocked isocyanate (neutralization reaction product) having a stop group (D) is obtained.
- Such a blocked isocyanate comprises a polyisocyanate capping residue (A), an antibacterial-non-blocking capping group (B), and a non-bacterial-blocking capping group (C); and a blocking group (D). Therefore, such blocked isocyanates have particularly excellent antibacterial and curable properties.
- the raw material component can contain the hydrophilic compound (e).
- the hydrophilic compound (e) is blended in the above ratio in the first reaction step and/or the second reaction step, if necessary.
- the hydrophilic compound (e) is blended with the antibacterial-non-blocking sealant (b) in the proportions mentioned above.
- the hydrophilic compound (e) when the hydrophilic compound (e) is blended, at least a portion of the free isocyanate groups of the polyisocyanate compound (a) are irreproducibly sealed by the antibacterial non-blocking sealant (b). be done. Furthermore, at least a portion of the free isocyanate groups of the polyisocyanate compound (a) are irreproducibly sealed by the hydrophilic compound (e).
- the primary reaction product is reacted with the non-antibacterial blocking sealant (c) to obtain a secondary reaction product (secondary reaction step).
- This provides a polyisocyanate capping residue (A), an antibacterial non-blocking group (B), a non-antibacterial blocking capping group (C), and a hydrophilic group (E).
- a blocked isocyanate (secondary reaction product) is obtained.
- Such a blocked isocyanate comprises a polyisocyanate capping residue (A), an antibacterial non-blocking group (B), a non-antibacterial blocking capping group (C), and further contains a hydrophilic blocking group (C). and a functional group (E). Therefore, such blocked isocyanates have particularly excellent water dispersibility.
- the raw material components include the antibacterial-blocking group-forming raw material (d) and the hydrophilic compound (e). I can do it.
- the hydrophilic compound (e) is preferably blended with the antibacterial non-blocking sealant (b) in the above proportion in the first reaction step.
- the tertiary amino group-containing compound (d1) is blended with the non-antibacterial block sealant (c) in the above ratio.
- the secondary reaction product is neutralized with acid (d2).
- the polyisocyanate has a capping residue (A), an antibacterial non-blocking group (B), a non-bacterial blocking group (C), and an antibacterial blocking group (D). ) and a hydrophilic group (E) (neutralization reaction product) is obtained.
- Such a blocked isocyanate comprises a polyisocyanate capping residue (A), an antibacterial-non-blocking capping group (B), and a non-bacterial-blocking capping group (C); It has a property-blocking group (D) and a hydrophilic group (E).
- Such blocked isocyanates therefore have particularly excellent antibacterial properties, curability and water dispersibility.
- the content of free isocyanate groups derived from polyisocyanate (a) is substantially zero.
- free isocyanate groups derived from polyisocyanate (a) are both free from antimicrobial-unblocking encapsulant (b) and non-antimicrobial-blocking encapsulant (c) (and, if necessary, antimicrobial - Reacts with either the block-capping group-forming raw material (d) or the hydrophilic compound (e)).
- all of the free isocyanate groups derived from polyisocyanate (a) are preferably combined with antimicrobial-non-blocking encapsulant (b) and non-antimicrobial-blocking encapsulant (c), respectively. It is reacting with either. As a result, all of the free isocyanate groups derived from the polyisocyanate (a) are sealed.
- the resulting blocked isocyanate comprises a polyisocyanate capping residue (A), an antibacterial-non-blocking capping group (B), and a non-antibacterial-blocking capping group (C).
- all of the free isocyanate groups derived from the polyisocyanate (a) are preferably removed from the antimicrobial-non-blocking encapsulant (b), the non-antimicrobial-blocking encapsulant (c), and the antimicrobial-antimicrobial encapsulant, respectively. Reacts with any of the blocking group-forming raw materials (d). As a result, all of the free isocyanate groups derived from the polyisocyanate (a) are sealed.
- the obtained blocked isocyanate comprises a polyisocyanate blocking residue (A), an antibacterial non-blocking group (B), and a non-bacterial blocking group (C), and further has antibacterial properties.
- - comprises a blocking group (D).
- all of the free isocyanate groups derived from the polyisocyanate (a) are preferably free of antibacterial-non-blocking encapsulant (b), non-antibacterial-blocking encapsulant (c), antibacterial- It reacts with either the block-capping group-forming raw material (d) or the hydrophilic compound (e).
- all of the free isocyanate groups derived from the polyisocyanate (a) are sealed.
- the obtained blocked isocyanate comprises a polyisocyanate blocking residue (A), an antibacterial non-blocking group (B), and a non-bacterial blocking group (C), and further has antibacterial properties.
- - Contains a block-capping group (D) and a hydrophilic group (E).
- reaction order of the raw material components is not limited to the above. That is, the polyisocyanate (a) and the antimicrobial-non-blocking sealant (b) and the non-antimicrobial-blocking sealant (c) can be reacted in any order. Further, the antibacterial blocking group forming raw material (d) and/or the hydrophilic compound (e) can be blended and reacted at any timing.
- each of the above reactions may be carried out without a solvent or, for example, in the presence of an organic solvent.
- organic solvents include ketones, nitriles, nitriles, aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbons, glycol ether esters, ethers, halogenated aliphatic hydrocarbons, and polar aprotons.
- the organic solvents can be used alone or in combination of two or more.
- an organic solvent a hydrophilic solvent capable of dissolving the quaternary ammonium group-containing compound is used.
- Hydrophilic solvents include, for example, nitriles (e.g., acetonitrile and propionitrile), and polar aprotons (e.g., acetone, N-methylpyrrolidone, dimethylformamide, N,N'-dimethylacetamide, dimethylsulfoxide, and hexamethylphosphonylamide).
- nitriles e.g., acetonitrile and propionitrile
- polar aprotons e.g., acetone, N-methylpyrrolidone, dimethylformamide, N,N'-dimethylacetamide, dimethylsulfoxide, and hexamethylphosphonylamide.
- any of the above reactions when an organic solvent is blended, for example, a solution of blocked isocyanate is obtained.
- the above organic reactions can be removed by adding water to the blocked isocyanate solution and/or blocked isocyanate dispersion to emulsify the blocked isocyanate, and then heating the emulsion under reduced pressure. can. Thereby, an aqueous dispersion of blocked isocyanate is obtained.
- the solid content concentration of the blocked isocyanate solution and/or aqueous dispersion is, for example, 1% by mass or more, preferably 10% by mass or more. Further, the solid content concentration of the blocked isocyanate solution and/or aqueous dispersion is, for example, 80% by mass or less, preferably 50% by mass or less.
- the antibacterial agent should just contain the above-mentioned blocked isocyanate.
- the antimicrobial agent may be a solid consisting of blocked isocyanate.
- the antibacterial agent may also be a blocked isocyanate solution and/or aqueous dispersion.
- the antibacterial agent may contain additives.
- additives include solvents, catalysts, epoxy resins, coating improvers, leveling agents, antifoaming agents, antioxidants, ultraviolet absorbers, thickeners, antisettling agents, plasticizers, surfactants, Examples include pigments, fillers, organic fine particles, inorganic fine particles, and fungicides.
- the amount of additives to be added is appropriately determined depending on the purpose and use.
- the antibacterial agent comprises the above-mentioned blocked isocyanate (polyisocyanate blocking residue (A), antibacterial non-blocking group (B), and non-antibacterial blocking blocking group (C)).
- blocked isocyanate polyisocyanate blocking residue (A), antibacterial non-blocking group (B), and non-antibacterial blocking blocking group (C)
- other isocyanate components may be included.
- Other isocyanate components include, for example, isocyanates without antibacterial non-blocking groups (B) and/or non-antibacterial blocking groups (C).
- the content ratio of other isocyanate components is not particularly limited, and is appropriately set depending on the purpose and use.
- the above antibacterial agents may be used in combination with known antibacterial agents. That is, the above antibacterial agents and other antibacterial agents can be mixed. Note that the mixing ratio is appropriately determined depending on the purpose and use.
- the above antibacterial agent contains blocked isocyanate.
- the blocked isocyanate comprises a polyisocyanate capping residue (A), an antibacterial non-blocking group (B), and a non-antibacterial blocking capping group (C).
- the antibacterial-nonblocking capping group (B) includes a quaternary ammonium group. Therefore, the antibacterial agent described above has excellent antibacterial properties and can be fixed in a resin with a relatively high degree of freedom.
- the average number of functional groups of the isocyanate groups (including free isocyanate groups and latent isocyanate groups) of the curing agent is, for example, 2 or more, preferably 2.5 or more. Further, the average number of functional groups of isocyanate groups (including free isocyanate groups and latent isocyanate groups) of the curing agent is, for example, 4 or less, preferably 3.5 or less.
- a resin composition is obtained by mixing a main ingredient that can react with free isocyanate groups and an antibacterial agent as a curing agent.
- free isocyanate groups are obtained by heating the resin composition to deblock the latent isocyanate groups of the antibacterial agent without dissociating at least a portion of the tertiary ammonium salt.
- the free isocyanate groups are reacted with the main agent.
- the resin include polyurethane resin, polyester resin, and acrylic resin, and preferably polyurethane resin.
- Main agent is a component capable of forming a resin by reacting with free isocyanate groups obtained by deblocking latent isocyanate groups.
- the base resin include active hydrogen group-containing compounds.
- An active hydrogen group-containing compound is a compound containing one or more active hydrogen groups in its molecule.
- the active hydrogen group-containing compound include polyol compounds and polyamine compounds.
- Preferable examples of the active hydrogen group-containing compound include polyol compounds.
- polyol compounds include low molecular weight polyols and high molecular weight polyols.
- the number average molecular weight of the low molecular weight polyol is, for example, less than 300, preferably less than 400.
- a low molecular weight polyol has two or more hydroxyl groups.
- Examples of the low molecular weight polyol include dihydric alcohol, trihydric alcohol, tetrahydric alcohol, pentahydric alcohol, hexahydric alcohol, heptahydric alcohol, and octahydric alcohol.
- Examples of dihydric alcohols include ethylene glycol, propylene glycol, 1,3-propanediol, 1,4-butylene glycol, 1,3-butylene glycol, 1,2-butylene glycol, 1,5-pentanediol, 1, 6-hexanediol, neopentyl glycol, 3-methyl-1,5-pentanediol, 2,2,2-trimethylpentanediol, 3,3-dimethylolheptane, alkane (C7-20) diol, 1,3- Cyclohexane dimethanol, 1,4-cyclohexanedimethanol, 1,3-cyclohexanediol, 1,4-cyclohexan
- Examples of trihydric alcohols include glycerin, trimethylolpropane, and triisopropanolamine.
- Examples of the tetrahydric alcohol include tetramethylolmethane (pentaerythritol) and diglycerin.
- An example of the pentahydric alcohol is xylitol.
- Examples of the hexahydric alcohol include sorbitol, mannitol, allitol, iditol, dulcitol, altritol, inositol, and dipentaerythritol.
- An example of the heptahydric alcohol is perseitol.
- Examples of the octahydric alcohol include sucrose.
- the low molecular weight polyols can be used alone or in combination of two or more.
- the number average molecular weight of the high molecular weight polyol is, for example, 300 or more, preferably 400 or more, and more preferably 500 or more.
- a high molecular weight polyol has two or more hydroxyl groups.
- high molecular weight polyols examples include polyether polyols, polyester polyols, polycarbonate polyols, polyurethane polyols, epoxy polyols, vegetable oil polyols, polyolefin polyols, acrylic polyols, vinyl monomer-modified polyols, and fluorine-containing polyols.
- polyether polyols examples include polyoxyalkylene (C2-3) polyols and polytetramethylene ether polyols.
- polyester polyols examples include adipic acid polyester polyols, phthalic acid polyester polyols, and lactone polyester polyols.
- polycarbonate polyols examples include ring-opening polymers of ethylene carbonate using the above-described low molecular weight polyols as initiators, and amorphous polycarbonate polyols obtained by copolymerizing the above-described dihydric alcohols and ring-opening polymers.
- polyurethane polyols examples include polyester polyurethane polyols, polyether polyurethane polyols, polycarbonate polyurethane polyols, and polyester polyether polyurethane polyols.
- epoxy polyol examples include epoxy polyols obtained by reacting the above-mentioned low molecular weight polyols with polyfunctional halohydrins.
- Examples of vegetable oil polyols include castor oil, coconut oil, and ester-modified castor oil polyols.
- polyolefin polyols examples include polybutadiene polyols and partially saponified ethylene-vinyl acetate copolymers.
- acrylic polyols examples include copolymers of hydroxyl group-containing acrylates and copolymerizable vinyl monomers that can be copolymerized with the hydroxyl group-containing acrylates.
- the vinyl monomer-modified polyol is obtained by reacting the above-described high molecular weight polyol with a vinyl monomer.
- fluorine-containing polyols examples include acrylic polyols in which a fluorine compound is blended as a copolymerizable vinyl monomer in the above-described copolymerization of acrylic polyols.
- the high molecular weight polyols can be used alone or in combination of two or more.
- the polyol compounds can be used alone or in combination of two or more.
- polystyrene resin examples include polystyrene resin, polystyrene resin, polystyrene resin, polystyrene resin, polystyrene resin, polystyrene resin, polystyrene resin, polystyrene resin, polystyrene resin, polystyrene resin, polystyrene resin, polystyrene resin, polystyrene resin, and the like.
- the main ingredient can contain additives.
- additives include reaction solvents, catalysts, epoxy resins, coating improvers, leveling agents, antifoaming agents, antioxidants, ultraviolet absorbers, thickeners, antisettling agents, plasticizers, surfactants, Examples include pigments, fillers, organic fine particles, inorganic fine particles, and fungicides.
- the amount of additives to be added is appropriately determined depending on the purpose and use.
- Resin Composition In the production of a resin composition, the above-mentioned main ingredient and an antibacterial agent as a curing agent are blended.
- the blending ratio is appropriately set depending on the purpose and use.
- the equivalent ratio (latent isocyanate group/active hydrogen group) of the latent isocyanate group of the antibacterial agent to the active hydrogen group of the base agent (active hydrogen group-containing compound) is, for example, 0.1 or more, preferably 0.5 or more. , more preferably 0.8 or more.
- the equivalent ratio (latent isocyanate group/active hydrogen group) of the latent isocyanate group of the antibacterial agent to the active hydrogen group of the base agent (active hydrogen group-containing compound) is, for example, 5 or less, preferably 3 or less, more preferably , 1.2 or less.
- the resin composition is applied to the object by a known coating method and dried to form a coating film. Thereafter, the coating film is heated and aged if necessary.
- the heating temperature and heating time are set so that the blocking agent can be dissociated from the latent isocyanate groups.
- the heating temperature is, for example, 50°C or higher, preferably 80°C or higher. Further, the heating temperature is, for example, 180°C or lower, preferably 150°C or lower.
- the heating time is, for example, 10 seconds or more, preferably 30 seconds or more. Further, the heating time is, for example, 10 minutes or less, preferably 5 minutes or less.
- the latent isocyanate group (non-antibacterial-blocking group (C)) of the antibacterial agent is unblocked and free isocyanate groups are regenerated. Then, the free isocyanate groups of the antibacterial agent and the main agent react to obtain a cured resin.
- the quaternary ammonium group (antibacterial-nonblocking group (B)) remains in the antibacterial agent. Further, when the antibacterial agent contains a tertiary ammonium salt (antibacterial-blocking group (D)), at least a portion of the tertiary ammonium salt remains in the antibacterial agent.
- the antibacterial agent when blended in such a way that it is in surplus, the excess antibacterial agent is contained in the resin (cured product) without reacting with the main ingredient. As a result, particularly good antibacterial properties are obtained due to the excess antibacterial agent.
- resin compositions (uncured products) and resins (cured products) include, for example, fiber treatment agents, water repellents, coating compositions, adhesives, antistatic agents, papermaking treatment agents, and wet paper strength. Enhancing agents, receiving layers of recording media, electrocoating compositions, antibacterial-antiviral compositions, encapsulated compositions, optical components and latex compositions are included.
- preferable uses include fiber treatment agents, water repellents, coating compositions, and adhesives, and more preferably fiber treatment agents and repellents. Examples include water medications.
- a resin (cured product) having excellent antibacterial properties is formed by the reaction between the main agent and the antibacterial agent as a curing agent.
- the base agent and the antibacterial agent do not have to react.
- the antibacterial agent is included in the dried base material and/or the cured base material. Therefore, a resin (cured product) having excellent antibacterial properties is formed.
- the antibacterial agent can also be cured alone.
- the antimicrobial agent can be self-crosslinked and cured by coating or impregnating the substrate with the antimicrobial agent and dissociating the blocking agent from the latent isocyanate groups. Further, for example, when the base material has an active hydrogen group, the base material and the antibacterial agent can be reacted to fix the antibacterial agent to the base material.
- Example 1 At room temperature (25°C), an isocyanurate derivative (polyisocyanate compound, trade name: Takenate D-) of xylylene diisocyanate (XDI) was placed in a 500 mL reactor equipped with a stirrer, thermometer, condenser and nitrogen gas inlet tube. 131N, solid content 75% by mass, isocyanate group content 13.7%, manufactured by Mitsui Chemicals, Inc.) and acetonitrile (solvent) were charged.
- polyisocyanate compound trade name: Takenate D-
- XDI xylylene diisocyanate
- choline chloride was added to the reactor.
- the proportion of choline chloride added was the number of moles shown in Tables 1 to 4 with respect to 100 moles of isocyanate groups possessed by the isocyanurate derivative of XDI.
- the temperature of the contents of the reactor was raised to 75° C. using a mantle heater, and the isocyanurate derivative of XDI was reacted with choline chloride.
- the isocyanate group concentration was measured and it was confirmed that some of the isocyanate groups were blocked by choline chloride.
- DMP 3,5-dimethylpyrazole
- an aqueous dispersion of blocked isocyanate was obtained as an antibacterial agent.
- the solid content concentration of the aqueous dispersion of blocked isocyanate was 20% by mass.
- Example 2 The formulations were changed to those listed in Tables 1 to 4. Except for this, an aqueous dispersion of blocked isocyanate was obtained as an antibacterial agent in the same manner as in Example 1.
- Example 18 At room temperature (25°C), an isocyanurate derivative (polyisocyanate compound, trade name: Takenate D-) of xylylene diisocyanate (XDI) was placed in a 500 mL reactor equipped with a stirrer, thermometer, condenser and nitrogen gas inlet tube. 131N, solid content 75% by mass, isocyanate group content 13.7%, manufactured by Mitsui Chemicals, Inc.) and acetonitrile (solvent) were charged.
- polyisocyanate compound trade name: Takenate D-
- XDI xylylene diisocyanate
- choline chloride and methoxypolyoxyethylene glycol were added to the reactor.
- the proportion of choline chloride added was the number of moles shown in Tables 1 to 4 with respect to 100 moles of isocyanate groups possessed by the isocyanurate derivative of XDI.
- the addition ratio of methoxypolyoxyethylene glycol was the number of moles shown in Tables 1 to 4 with respect to 100 moles of isocyanate groups possessed by the isocyanurate derivative of XDI.
- the temperature of the contents of the reactor was raised to 75° C. using a mantle heater, and the isocyanurate derivative of XDI, choline chloride, and methoxypolyoxyethylene glycol were reacted.
- the isocyanate group concentration was measured and it was confirmed that the isocyanurate derivative of XDI was modified with methoxypolyoxyethylene glycol (hydrophilic compound).
- the isocyanate group concentration was measured and it was confirmed that some of the isocyanate groups were blocked by choline chloride.
- DMP 3,5-dimethylpyrazole
- the blocked isocyanate had a quaternary ammonium group derived from choline chloride and an oxyethylene group derived from methoxypolyoxyethylene glycol (a hydrophilic compound), and had excellent water dispersibility.
- an aqueous dispersion of blocked isocyanate was obtained as an antibacterial agent.
- the solid content concentration of the aqueous dispersion of blocked isocyanate was 20% by mass.
- Example 19 At room temperature (25°C), an isocyanurate derivative (polyisocyanate compound, trade name: Takenate D-) of xylylene diisocyanate (XDI) was placed in a 500 mL reactor equipped with a stirrer, thermometer, condenser and nitrogen gas inlet tube. 131N, solid content 75% by mass, isocyanate group content 13.7%, manufactured by Mitsui Chemicals, Inc.) and acetonitrile (solvent) were charged.
- polyisocyanate compound trade name: Takenate D-
- XDI xylylene diisocyanate
- choline chloride was added to the reactor.
- the proportion of choline chloride added was the number of moles shown in Tables 1 to 4 with respect to 100 moles of isocyanate groups possessed by the isocyanurate derivative of XDI.
- the temperature of the contents of the reactor was raised to 75° C. using a mantle heater, and the isocyanurate derivative of XDI was reacted with choline chloride.
- the isocyanate group concentration was measured and it was confirmed that some of the isocyanate groups were blocked by choline chloride.
- DMP 3,5-dimethylpyrazole
- TMG 1,1,3,3-tetramethylguanidine
- acetic acid was added to the reaction solution and stirred.
- the ratio of acetic acid added was the number of moles shown in Tables 1 to 4 with respect to 1 mole of TMG used.
- the tertiary amino group derived from TMG was neutralized by acetic acid, and a tertiary ammonium salt (ammonium acetate salt) was formed.
- the blocked isocyanate had a quaternary ammonium group derived from choline chloride and a tertiary ammonium salt (ammonium acetate salt) derived from TMG and acetic acid, and had excellent water dispersibility.
- an aqueous dispersion of blocked isocyanate was obtained as an antibacterial agent.
- the solid content concentration of the aqueous dispersion of blocked isocyanate was 20% by mass.
- Example 20 At room temperature (25°C), an isocyanurate derivative (polyisocyanate compound, trade name: Takenate D-) of xylylene diisocyanate (XDI) was placed in a 500 mL reactor equipped with a stirrer, thermometer, condenser and nitrogen gas inlet tube. 131N, solid content 75% by mass, isocyanate group content 13.7%, manufactured by Mitsui Chemicals, Inc.) and acetonitrile (solvent) were charged.
- polyisocyanate compound trade name: Takenate D-
- XDI xylylene diisocyanate
- choline chloride and methoxypolyoxyethylene glycol were added to the reactor.
- the proportion of choline chloride added was the number of moles shown in Tables 1 to 4 with respect to 100 moles of isocyanate groups possessed by the isocyanurate derivative of XDI.
- the addition ratio of methoxypolyoxyethylene glycol was the number of moles shown in Tables 1 to 4 with respect to 100 moles of isocyanate groups possessed by the isocyanurate derivative of XDI.
- the temperature of the contents of the reactor was raised to 75° C. using a mantle heater, and the isocyanurate derivative of XDI, choline chloride, and methoxypolyoxyethylene glycol were reacted.
- the isocyanate group concentration was measured and it was confirmed that the isocyanurate derivative of XDI was modified with methoxypolyoxyethylene glycol (hydrophilic compound).
- the isocyanate group concentration was measured and it was confirmed that some of the isocyanate groups were blocked by choline chloride.
- DMP 3,5-dimethylpyrazole
- TMG 1,1,3,3-tetramethylguanidine
- acetic acid was added to the reaction solution and stirred.
- the ratio of acetic acid added was the number of moles shown in Tables 1 to 4 with respect to 1 mole of TMG used.
- the tertiary amino group derived from TMG was neutralized by acetic acid, and a tertiary ammonium salt (ammonium acetate salt) was formed.
- the block isocyanate includes a quaternary ammonium group derived from choline chloride, an oxyethylene group derived from methoxypolyoxyethylene glycol (hydrophilic compound), and a tertiary ammonium salt (ammonium acetate salt) derived from TMG and acetic acid. It had excellent water dispersibility.
- an aqueous dispersion of blocked isocyanate was obtained as an antibacterial agent.
- the solid content concentration of the aqueous dispersion of blocked isocyanate was 20% by mass.
- Example 21 At room temperature (25°C), an isocyanurate derivative (polyisocyanate compound, trade name: Takenate D-) of xylylene diisocyanate (XDI) was placed in a 500 mL reactor equipped with a stirrer, thermometer, condenser and nitrogen gas inlet tube. 131N, solid content 75% by mass, isocyanate group content 13.7%, manufactured by Mitsui Chemicals, Inc.) and acetonitrile (solvent) were charged.
- polyisocyanate compound trade name: Takenate D-
- XDI xylylene diisocyanate
- DMAE dimethylaminoethanol
- the temperature of the contents of the reactor was raised to 75° C. using a mantle heater, and the isocyanurate derivative of XDI was reacted with DMAE.
- the isocyanate group concentration was measured and it was confirmed that some of the isocyanate groups were blocked by DMAE.
- DMP 3,5-dimethylpyrazole
- methyl chloride (approximately 5.7% tetrahydrofuran solution, manufactured by Tokyo Kasei Kogyo Co., Ltd.) was added to the reaction solution. Thereby, the tertiary amino group derived from DMAE was quaternized.
- Comparative example 1 Instead of the isocyanurate derivative of xylylene diisocyanate (XDI), an isocyanurate derivative of hexamethine diisocyanate (HDI) (polyisocyanate compound, trade name: Takenate D-170N, solid content 100% by mass, isocyanate group content 20.7 %, manufactured by Mitsui Chemicals, Inc.) was used. Also, choline chloride was not used. Except for the above, an aqueous dispersion of blocked isocyanate was obtained as an antibacterial agent in the same manner as in Example 19. The solid content concentration of the aqueous dispersion of blocked isocyanate was 20% by mass.
- HDI polyisocyanate compound, trade name: Takenate D-170N, solid content 100% by mass, isocyanate group content 20.7 %, manufactured by Mitsui Chemicals, Inc.
- Comparative example 2 Instead of the isocyanurate derivative of xylylene diisocyanate (XDI), an isocyanurate derivative of hexamethine diisocyanate (HDI) (polyisocyanate compound, trade name: Takenate D-170N, solid content 100% by mass, isocyanate group content 20.7 %, manufactured by Mitsui Chemicals, Inc.) was used. Also, choline chloride was not used. Except for the above, an aqueous dispersion of blocked isocyanate was obtained as an antibacterial agent in the same manner as in Example 18. The solid content concentration of the aqueous dispersion of blocked isocyanate was 20% by mass.
- HDI polyisocyanate compound, trade name: Takenate D-170N, solid content 100% by mass, isocyanate group content 20.7 %, manufactured by Mitsui Chemicals, Inc.
- Synthesis Example 1 (Preparation of main agent for evaluation) At room temperature (25°C), polytetramethylene ether glycol (trade name: PTG-2000SN, manufactured by Hodogaya Chemical Co., Ltd.) 703. 3 parts by mass, 52.8 parts by mass of triethylene glycol (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 144.6 parts by mass of N-methyldiethanolamine (manufactured by Tokyo Kasei Kogyo Co., Ltd.), and 293.3 parts by mass of acetonitrile. Then, they were stirred for 30 minutes at a liquid temperature of 40° C. or lower.
- 1,3-bis(isocyanatomethyl)cyclohexane (trade name: Takenate 600, manufactured by Mitsui Chemicals) was added to the reactor. Then, 1,3-bis(isocyanatomethyl)cyclohexane, polytetramethylene ether glycol, triethylene glycol, and N-methyldiethanolamine were reacted for 30 minutes.
- stannous octylate (trade name: Stanoct, manufactured by Mitsubishi Chemical Corporation) was added to the reactor, and the reactor was heated until the liquid temperature reached 75°C. Then, 1,3-bis(isocyanatomethyl)cyclohexane, polytetramethylene ether glycol, triethylene glycol, and N-methyldiethanolamine were reacted at a liquid temperature of 75° C. for 3 hours. Thereafter, by measuring the FT-IR spectrum, it was confirmed that the isocyanate group had reacted. This produced a polyurethane resin.
- stannous octylate trade name: Stanoct, manufactured by Mitsubishi Chemical Corporation
- reaction solution containing the polyurethane resin was cooled to room temperature (25° C.), 72.9 parts by mass of acetic acid and 586.7 parts by mass of acetonitrile were added to the reaction solution, and the mixture was stirred for 1 hour. Through the above steps, an acetonitrile solution of polyurethane resin was obtained.
- an aqueous dispersion of polyurethane resin was prepared.
- the solid content concentration of the aqueous dispersion of polyurethane resin was 26.2% by mass.
- ⁇ The reaction solution containing the blocked isocyanate is rapidly dispersed in water.
- ⁇ The reaction solution containing the blocked isocyanate is dispersed in water by stirring for a long time (0.5 hours or more).
- ⁇ The reaction solution containing the blocked isocyanate is not dispersed in water. Precipitation occurs.
- test bacterial solution (number of bacteria: 2.5 x 10 5 cells/mL to 10 x 10 5 cells/mL) was inoculated.
- test bacterial solution was prepared by the following method.
- the cultured bacteria was precultured in an LB medium (BD Difco (trade name), LB Bross Miller, Becton Dickinson) for 20 ⁇ 4 hours at a temperature of 35 ⁇ 1°C in an incubator (liquid 1).
- LB medium BD Difco (trade name), LB Bross Miller, Becton Dickinson
- the first solution was further inoculated into a slant culture medium (ordinary agar medium, Nutrient Agar, Merck & Co.), and precultured in an incubator at a temperature of 35 ⁇ 1° C. for 20 ⁇ 4 hours (second solution).
- a slant culture medium ordinary agar medium, Nutrient Agar, Merck & Co.
- the concentration of the second solution was adjusted appropriately using a separately prepared 1/500 normal bouillon medium (Nutrient broth, Merck & Co., Ltd.) (third solution).
- a 50 ⁇ 2 mm square polyethylene terephthalate film (trade name Lumirror S10, manufactured by Toray Industries, Inc.) was prepared and inoculated with a test bacterial solution in the same manner as the test piece.
- SCDLP medium Daigo (trade name), manufactured by Nippon Pharmaceutical Co., Ltd.
- each dilution series was mixed with a standard agar medium (Standard Agar Medium Daigo (trade name), a product of Nippon Pharmaceutical Co., Ltd.) to prepare a medium. After culturing the medium at a temperature of 35 ⁇ 1° C. for 20 ⁇ 4 hours, the number of colonies was measured. Note that the Petri dishes of the dilution series in which 30 to 300 colonies appeared were counted.
- a standard agar medium Standard Agar Medium Daigo (trade name), a product of Nippon Pharmaceutical Co., Ltd.
- N C ⁇ D ⁇ V/A
- N Number of viable bacteria (per 1cm2 of test piece)
- C Number of colonies
- D Dilution ratio (dilution ratio of each diluent in the adopted petri dish)
- V Volume of SCDLP medium used for washing (mL)
- A Surface area of coating film (cm 2 )
- Antibacterial activity values were calculated using the following formula.
- U0 Average value of the logarithm of the number of viable bacteria immediately after inoculation of the untreated test piece
- Ut Average value of the logarithm of the number of viable bacteria 24 hours after inoculation of the untreated test piece
- Antibacterial activity value R is 3.0 or more (strong antibacterial activity) 2: Antibacterial activity value R is 2.0 or more and less than 3.0 (with antibacterial activity) 1: Antibacterial activity value R is less than 2.0 (no antibacterial activity)
- a cotton cloth (length 25 cm x width 25 cm, based on JIS L0803, Kanakin No. 3) was immersed in the above mixed solution. The cotton fabric was then lifted from the mixture and thoroughly wrung out. Thereafter, the cotton fabric was dried in the dark at room temperature (25° C.) for 24 hours. Further, the dried cotton cloth was dried in a heating oven at 150° C. for 2 minutes. As a result, an antibacterial treated test piece was obtained.
- antibacterial activity values were calculated using the following formula.
- R (Ct-C0)-(Tt-T0)
- Ct Average value of the logarithm of the number of viable bacteria on the untreated test piece 24 hours after inoculation
- Tt Average value of the logarithm of the number of viable bacteria of the antibacterial treated test piece 24 hours later
- Antibacterial activity value R is 3.0 or more (strong antibacterial activity) 2: Antibacterial activity value R is 2.0 or more and less than 3.0 (with antibacterial activity) 1: Antibacterial activity value R is less than 2.0 (no antibacterial activity)
- a leveling agent (trade name: BYK-348, manufactured by BYK-Chemie Japan) was added to the mixed dispersion and stirred for 30 minutes.
- the addition ratio of the leveling agent was 0.5 parts by mass to 100 parts by mass of the mixed dispersion.
- the curability evaluation liquid was applied to the polypropylene base material. Thereafter, the coating film of the curability evaluation liquid was cured at 120° C. for 30 minutes. After measuring the mass of the cured coating film, it was immersed in a mixed solvent of acetone and methanol at a mass ratio of 1:1 for 24 hours.
- the mass of the coating film after curing and before immersion in the mixed solvent was defined as mass A
- mass of the coating film after immersion in the mixed solvent was defined as mass B.
- the curability of the blocked isocyanate when the curing temperature of the coating film was 120°C was evaluated on a five-grade scale based on the following criteria.
- a leveling agent (trade name: BYK-348, manufactured by BYK-Chemie Japan) was added to the mixed dispersion and stirred for 30 minutes.
- the addition ratio of the leveling agent was 0.5 parts by mass to 100 parts by mass of the mixed dispersion. In this way, a curable evaluation liquid was prepared.
- the curability evaluation liquid was applied to the polypropylene base material. Thereafter, the coating film of the curability evaluation liquid was cured at 150° C. for 30 minutes.
- the amount of change in yellowing degree was evaluated using the following criteria. In addition, it was judged that the light resistance was high in order from 1 to 3.
- Amount of change in yellowing degree ( ⁇ b * ) is less than 1, 2 points ( ⁇ ); Amount of change in yellowing degree ( ⁇ b * ) is 1 or more and less than 3, 1 point ( ⁇ ); The amount of change ( ⁇ b * ) is 3 or more
- D-131N Isocyanurate derivative of xylylene diisocyanate (XDI), trade name: Takenate D-131N, solid content 75% by mass, isocyanate group content 13.7%, manufactured by Mitsui Chemicals D-170N; Hexamethine diisocyanate ( HDI) isocyanurate derivative, trade name: Takenate D-170N, solid content 100% by mass, isocyanate group content 20.7%, manufactured by Mitsui Chemicals D-127N; 1,3-bis(isocyanatomethyl)cyclohexane ( Isocyanurate of 1,3-H 6 Isocyanurate, trade name: Stabio D-370N, solid content 100% by mass, isocyanate group content 25%, manufactured by Mitsui Chemicals D-204; isocyanurate of tolylene diisocyanate (TDI), trade name: Takenate D-204, Solid content 50% by mass, iso
- Example 22 The antibacterial agent of Example 1 was diluted with water to obtain a diluted antibacterial agent solution.
- the solid content concentration of the antibacterial agent diluted liquid was 0.84% by mass.
- a standard fabric (cotton) for antibacterial testing manufactured by the Fiber Evaluation Technology Council
- the antibacterial test standard fabric was then removed from the antibacterial agent dilution solution.
- a standard cloth for antibacterial testing was squeezed so that the wet pickup was 100%.
- the standard cloth for antibacterial testing was left standing in a dark place and dried at room temperature (25° C.) for 24 hours. Thereafter, the dried standard cloth for antibacterial testing was dried in a heating oven at 170° C. for 3 minutes. As a result, an antibacterial treated test cloth was obtained.
- the antibacterial properties of the antibacterial processing test cloth that had been washed 10 times and the antibacterial properties of the antibacterial processing test fabric that had not been washed were evaluated, respectively. More specifically, the method described above as “4: Antibacterial property (textile test)” is the “bacterial liquid absorption method” described in “Antibacterial test method and antibacterial effect of textile products” of JIS L 1902:2015. The antibacterial properties against Staphylococcus aureus were evaluated with reference to.
- the antibacterial activity value R of the unwashed test cloth for antibacterial processing was 2.0 or more. From this result, it was confirmed that the above antibacterial agent alone exhibits antibacterial properties.
- the antibacterial activity value R of the test cloth for antibacterial processing that was washed 10 times was also 2.0 or more. This result confirmed that antibacterial properties were maintained even after washing.
- the antibacterial agent of the present invention is applicable to fiber treatment agents, water repellents, coating compositions, adhesives, antistatic agents, paper processing agents, wet paper strength enhancers, receiving layers of recording media, electrodeposition coating compositions, antibacterial agents, etc. - Suitable for use in the fields of antiviral compositions, encapsulated compositions, optical components and latex compositions.
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Abstract
Description
(1)ブロックイソシアネート
抗菌剤は、ブロックイソシアネートを含んでいる。ブロックイソシアネートは、潜在イソシアネート基を備える化合物である。潜在イソシアネート基は、脱ブロックによりイソシアネート基(活性イソシアネート基)を再生可能な官能基である。
ポリイソシアネートの封止残基(A)は、ブロックイソシアネートの主分子骨格である。ポリイソシアネートの封止残基(A)は、ポリイソシアネート(後述)のイソシアネート基が封止されてなる残部である。なお、封止は、ブロック封止および非ブロック封止を含む。
抗菌性-非ブロック封止基(B)は、ポリイソシアネート(後述)のイソシアネート基の少なくとも一部が再生不能に封止されてなる。すなわち、抗菌性-非ブロック封止基(B)は、脱ブロック不能の末端封止基である。
非抗菌性-ブロック封止基(C)は、ポリイソシアネート(後述)のイソシアネート基の少なくとも一部が、再生可能に封止されてなる。すなわち、非抗菌性-ブロック封止基(C)は、脱ブロック可能な潜在イソシアネート基(ブロックドイソシアネート基)である。
ブロックイソシアネートは、さらに、抗菌性-ブロック封止基(D)を備えることができる。抗菌性-ブロック封止基(D)によって、ブロックイソシアネートの反応性(硬化性)を向上させることができる。
ブロックイソシアネートは、さらに、親水性基(E)を備えることができる。親水性基(E)によって、ブロックイソシアネートの水分散性を向上させることができる。
また、親水性基(E)の割合は、抗菌性-非ブロック封止基(B)100モルに対して、抗菌性、水分散性および貯蔵安定性の観点から、例えば、30モル以下、好ましくは、25モル以下、より好ましくは、20モル以下である。
(1)原料成分
ブロックイソシアネートは、以下の原料成分の反応生成物として得ることができる。ブロックイソシアネートの原料成分は、例えば、ポリイソシアネート(a)と、抗菌性-非ブロック封止剤(b)と、非抗菌性-ブロック封止剤(c)とを含んでいる。
ポリイソシアネート(a)は、封止残基(A)を形成するための原料化合物である。ポリイソシアネート(a)は、複数のイソシアネート基を有している。ポリイソシアネート(a)としては、例えば、ポリイソシアネート単量体、および、ポリイソシアネート誘導体が挙げられる。
抗菌性-非ブロック封止剤(b)は、抗菌性-非ブロック封止基(B)を形成するための原料化合物である。抗菌性-非ブロック封止剤(b)は、上記ポリイソシアネート(a)のイソシアネート基の少なくとも一部と反応し、抗菌性-非ブロック封止基(B)を形成する。
非抗菌性-ブロック封止剤(c)は、非抗菌性-ブロック封止基(C)を形成するための原料化合物である。非抗菌性-ブロック封止剤(c)は、上記ポリイソシアネート(a)のイソシアネート基の少なくとも一部と反応し、非抗菌性-ブロック封止基(C)を形成する。
原料成分は、さらに、上記抗菌性-ブロック封止基(D)を形成するための原料化合物(以下、抗菌性-ブロック封止基形成原料)(d)を含むことができる。
(式中、R1~R5は、炭素数1~12の炭化水素基または水素原子を示す。ただし、R1とR2との両方が炭素数1~12の炭化水素基を示すか、および/または、R4とR5との両方が炭素数1~12の炭化水素基を示す。また、R1およびR3が互いに結合してヘテロ環を形成してもよい。また、R4およびR1が互いに結合してヘテロ環を形成してもよい。また、R5およびR3が互いに結合してヘテロ環を形成してもよい。)
上記一般式(1)において、R1~R5は、互いに同一または相異なってよい。R1~R5は、炭素数1~12の炭化水素基または水素原子を示す。
原料成分は、さらに、上記親水性基(E)を形成するための親水性化合物(e)を含むことができる。
また、親水性化合物(e)の割合は、ポリイソシアネート(a)100質量部に対して、抗菌性、水分散性および貯蔵安定性の観点から、例えば、65.0質量部以下、好ましくは、32.0質量部以下、より好ましくは、30.0質量部以下である。
原料成分の反応では、上記の各成分を同時反応させてもよく、また、上記の各成分を順次反応させてもよい。
上記の方法では、ポリイソシアネート(a)と、抗菌性-非ブロック封止剤(b)とを反応させることにより、抗菌性-非ブロック封止基(B)を形成しているが、例えば、抗菌性-非ブロック封止剤(b)を用いることなく、抗菌性-非ブロック封止基(B)を形成してもよい。
原料成分は、抗菌性-ブロック封止基形成原料(d)を含むことができる。このような場合、必要に応じて、一次反応工程および/または二次反応工程において、3級アミノ基含有化合物(d1)を、上記の割合で配合する。好ましくは、二次反応工程において、非抗菌性-ブロック封止剤(c)とともに、3級アミノ基含有化合物(d1)を、上記の割合で配合する。
原料成分が、親水性化合物(e)を含むことができる。このような場合、必要に応じて、一次反応工程および/または二次反応工程において、親水性化合物(e)を、上記の割合で配合する。好ましくは、一次反応工程において、抗菌性-非ブロック封止剤(b)とともに、親水性化合物(e)を、上記の割合で配合する。
原料成分が、抗菌性-ブロック封止基形成原料(d)および親水性化合物(e)を含むことができる。このような場合、好ましくは、一次反応工程において、抗菌性-非ブロック封止剤(b)とともに、親水性化合物(e)を、上記の割合で配合する。また、好ましくは、二次反応工程において、非抗菌性-ブロック封止剤(c)とともに、3級アミノ基含有化合物(d1)を、上記の割合で配合する。また、上記と同様に、二次反応生成物を、酸(d2)で中和する。
原料成分の反応順序は、上記に制限されない。すなわち、ポリイソシアネート(a)と、抗菌性-非ブロック封止剤(b)および非抗菌性-ブロック封止剤(c)とを、任意の順序で反応させることができる。また、抗菌性-ブロック封止基形成原料(d)および/または親水性化合物(e)を、任意のタイミングで配合し、反応させることができる。
抗菌剤は、上記のブロックイソシアネートを含有していればよい。例えば、抗菌剤は、ブロックイソシアネートからなる固形分であってもよい。また、抗菌剤は、ブロックイソシアネートの溶液および/または水分散液であってもよい。
上記の抗菌剤は、ブロックイソシアネートを含む。ブロックイソシアネートが、ポリイソシアネートの封止残基(A)と、抗菌性-非ブロック封止基(B)と、非抗菌性-ブロック封止基(C)とを備える。そして、抗菌性-非ブロック封止基(B)が、4級アンモニウム基を含む。そのため、上記の抗菌剤は、優れた抗菌性を有し、かつ、比較的高い自由度で樹脂中に固定可能である。
(1)硬化剤
以下において、抗菌剤を、樹脂(被固定化物)に固定する方法について、詳述する。抗菌剤を樹脂に固定する場合、抗菌剤は、好ましくは、硬化剤として兼用される。
主剤は、潜在イソシアネート基の脱ブロックにより得られる遊離のイソシアネート基と反応し、樹脂を形成可能な成分である。例えば、樹脂がポリウレタン樹脂である場合、主剤としては、例えば、活性水素基含有化合物が挙げられる。活性水素基含有化合物は、分子中に1つ以上の活性水素基を含有する化合物である。活性水素基含有化合物としては、例えば、ポリオール化合物およびポリアミン化合物が挙げられる。活性水素基含有化合物として、好ましくは、ポリオール化合物が挙げられる。
樹脂組成物の製造では、上記の主剤と、硬化剤としての抗菌剤とを配合する。配合割合は、目的および用途に応じて、適宜設定される。例えば、主剤(活性水素基含有化合物)の活性水素基に対する、抗菌剤の潜在イソシアネート基の当量比(潜在イソシアネート基/活性水素基)は、例えば、0.1以上、好ましくは、0.5以上、より好ましくは、0.8以上である。また、主剤(活性水素基含有化合物)の活性水素基に対する、抗菌剤の潜在イソシアネート基の当量比(潜在イソシアネート基/活性水素基)は、例えば、5以下、好ましくは、3以下、より好ましくは、1.2以下である。
室温(25℃)において、攪拌機、温度計、冷却器および窒素ガス導入管を備えた容量500mLの反応器に、キシリレンジイソシアネート(XDI)のイソシアヌレート誘導体(ポリイソシアネート化合物、商品名:タケネートD-131N、固形分75質量%、イソシアネート基含有量13.7%、三井化学社製)50質量部と、アセトニトリル(溶媒)とを仕込んだ。
表1~表4に記載の処方に変更した。これ以外は、実施例1と同じ方法で、抗菌剤として、ブロックイソシアネートの水分散液を得た。
室温(25℃)において、攪拌機、温度計、冷却器および窒素ガス導入管を備えた容量500mLの反応器に、キシリレンジイソシアネート(XDI)のイソシアヌレート誘導体(ポリイソシアネート化合物、商品名:タケネートD-131N、固形分75質量%、イソシアネート基含有量13.7%、三井化学社製)50質量部と、アセトニトリル(溶媒)とを仕込んだ。
イソシアネート基濃度を測定して、XDIのイソシアヌレート誘導体が、メトキシポリオキシエチレングリコール(親水性化合物)により変性されていることを確認した。また、イソシアネート基濃度を測定して、イソシアネート基の一部が塩化コリンおよびにより封止されていることを確認した。
室温(25℃)において、攪拌機、温度計、冷却器および窒素ガス導入管を備えた容量500mLの反応器に、キシリレンジイソシアネート(XDI)のイソシアヌレート誘導体(ポリイソシアネート化合物、商品名:タケネートD-131N、固形分75質量%、イソシアネート基含有量13.7%、三井化学社製)50質量部と、アセトニトリル(溶媒)とを仕込んだ。
室温(25℃)において、攪拌機、温度計、冷却器および窒素ガス導入管を備えた容量500mLの反応器に、キシリレンジイソシアネート(XDI)のイソシアヌレート誘導体(ポリイソシアネート化合物、商品名:タケネートD-131N、固形分75質量%、イソシアネート基含有量13.7%、三井化学社製)50質量部と、アセトニトリル(溶媒)とを仕込んだ。
イソシアネート基濃度を測定して、XDIのイソシアヌレート誘導体が、メトキシポリオキシエチレングリコール(親水性化合物)により変性されていることを確認した。また、イソシアネート基濃度を測定して、イソシアネート基の一部が塩化コリンおよびにより封止されていることを確認した。
室温(25℃)において、攪拌機、温度計、冷却器および窒素ガス導入管を備えた容量500mLの反応器に、キシリレンジイソシアネート(XDI)のイソシアヌレート誘導体(ポリイソシアネート化合物、商品名:タケネートD-131N、固形分75質量%、イソシアネート基含有量13.7%、三井化学社製)50質量部と、アセトニトリル(溶媒)とを仕込んだ。
キシリレンジイソシアネート(XDI)のイソシアヌレート誘導体に代えて、ヘキサメチンジイソシアネート(HDI)のイソシアヌレート誘導体(ポリイソシアネート化合物、商品名:タケネートD-170N、固形分100質量%、イソシアネート基含有量20.7%、三井化学社製)を使用した。また、塩化コリンを使用しなかった。これら以外は、実施例19と同じ方法で、抗菌剤として、ブロックイソシアネートの水分散液を得た。
ブロックイソシアネートの水分散液の固形分濃度は、20質量%であった。
キシリレンジイソシアネート(XDI)のイソシアヌレート誘導体に代えて、ヘキサメチンジイソシアネート(HDI)のイソシアヌレート誘導体(ポリイソシアネート化合物、商品名:タケネートD-170N、固形分100質量%、イソシアネート基含有量20.7%、三井化学社製)を使用した。また、塩化コリンを使用しなかった。これら以外は、実施例18と同じ方法で、抗菌剤として、ブロックイソシアネートの水分散液を得た。
ブロックイソシアネートの水分散液の固形分濃度は、20質量%であった。
室温(25℃)において、攪拌機、温度計、冷却器および窒素ガス導入管を備えた容量3Lの反応器に、ポリテトラメチレンエーテルグリコール(商品名:PTG-2000SN、保土谷化学社製)703.3質量部と、トリエチレングリコール(東京化成工業社製)52.8質量部と、N-メチルジエタノールアミン(東京化成工業社製)144.6質量部と、アセトニトリル293.3質量部とを仕込んで、それらを液温40℃以下で30分間攪拌した。
以上によって、ポリウレタン樹脂のアセトニトリル溶液を得た。
<1;水分散性>
各実施例および各比較例に記載の通り、ブロックイソシアネートを含む反応液に水を添加して、反応液と水とをホモミキサーで攪拌して乳化させた。このときの水に対する反応液の分散性を、ブロックイソシアネートの水分散性として評価した。評価基準を下記する。
△:長時間(0.5時間以上)の撹拌でブロックイソシアネートを含む反応液が水に分散する。
×:ブロックイソシアネートを含む反応液が水に分散しない。沈殿発生。
ブロックイソシアネートの水分散液を、容器に収容した。そして、ブロックイソシアネートの水分散液を、25℃で7日間静置した。その後、目視により、水分散液の貯蔵安定性を、下記の基準で5段階評価した。なお、以下の各評価において、5が最も優れている。また、1が最も劣っている。
4:水分散液に沈殿が確認されず、かつ、容器壁面にわずかな付着物が確認された。
3:水分散液に沈殿が確認されず、かつ、容器壁面に付着物が確認された。
2:水分散液にわずかな沈殿が確認され、かつ、容器壁面に付着物が確認された。
1:水分散液に沈殿が確認され、かつ、容器壁面に付着物が確認された。
(供試菌種)
Escherichia Coli(E.coli、NBRC-3972、分譲機関 独立行政法人 製品評価技術基盤機構、大腸菌)
各実施例および各比較例のブロックイソシアネート1.8質量部(固形分基準)と、タケラック W-6355(商品名、水系ポリウレタン樹脂、三井化学社製)88.2質量部(固形分基準)と、イソプロピルアルコール10.0質量部とを混合し、混合液を得た。さらに、混合液に水を添加し、混合液の固形分濃度を10質量%に調整した。
フィルムを50±2mm角の正方形に切り出し、試験片とした。試験片を滅菌済のプラスチックシャーレに置き、試験菌液(菌数2.5×105個/mL~10×105個/mL)を0.4mL接種した。なお、試験菌液は、以下の方法で調製した。
一方、対照試料として、50±2mm角のポリエチレンテレフタレートフィルム(商品名ルミラーS10、東レ社製)を用意し、試験片と同様に、試験菌液を接種した。
次いで、接種した試験菌液の上から、40±2mm角の二軸延伸ポリプロピレン(OPP)フィルムを被せ、これにより、フィルム全体に、試験菌液を均等に接種させた。その後、温度35±1℃、相対湿度85±5%で20±4時間、培養した。
試験菌液の接種直後、または、上記(4)の培養後に、SCDLP培地(SCDLP培地ダイゴ(商品名)、日本製薬社製)10mLを加え、試験片上の試験菌液を、4回以上洗浄し、菌液を完全に回収した。また、回収された液(洗い出し液)を、速やかに次の工程に供し、生菌数を測定した。
上記(5)で回収された液(洗い出し液)と、リン酸緩衝生理食塩水とを使用して、10倍希釈系列を調製した。
測定結果に基づいて、以下の計算式を用いて生菌数を求めた。
N=C×D×V/A
N:生菌数(試験片1cm2あたり)
C:集落数
D:希釈倍率(採用したシャーレにおける各希釈液の希釈倍数)
V:洗い出しに用いたSCDLP培地の液量(mL)
A:被覆フィルムの表面積(cm2)
以下の計算式を用いて抗菌活性値を算出した。
R=(Ut-U0)-(At-U0)=Ut-At
R :抗菌活性値
U0:無加工試験片の接種直後の生菌数の対数値の平均値
Ut:無加工試験片の24時間後の生菌数の対数値の平均値
At:抗菌加工試験片の24時間後の生菌数の対数値の平均値
2:抗菌活性値Rが2.0以上3.0未満(抗菌活性あり)
1:抗菌活性値Rが2.0未満(抗菌活性なし)
(供試菌種)
Staphylococcus aureus(S.aureus、NBRC-12732、分譲機関 独立行政法人 製品評価技術基盤機構、黄色ブドウ球菌)
各実施例および各比較例のブロックイソシアネート1.8質量部(固形分基準)と、合成例1のポリウレタン樹脂88.2質量部(固形分基準)と、イソプロピルアルコール10.0質量部とを混合し、混合液を得た。さらに、混合液に水を添加し、混合液の固形分濃度を10質量%に調整した。
抗菌加工試験片0.4gをガラス瓶に入れ、抗菌加工試験片に、試験菌液0.2mLを滴下した。その後、ガラス瓶に蓋をして、37℃で24時間培養した。次いで、ガラス瓶に洗い出し液20mLを添加し、抗菌加工試験片から菌液を洗い出した。その後、洗い出し液中の生菌数を、混釈平板培養法または発光測定法により測定した。
測定結果に基づいて、以下の計算式を用いて抗菌活性値を算出した。
R=(Ct-C0)-(Tt-T0)
R :抗菌活性値
C0:無加工試験片の接種直後の生菌数の対数値の平均値
Ct:無加工試験片の24時間後の生菌数の対数値の平均値
T0:抗菌加工試験片の接種直後の生菌数の対数値の平均値
Tt:抗菌加工試験片の24時間後の生菌数の対数値の平均値
2:抗菌活性値Rが2.0以上3.0未満(抗菌活性あり)
1:抗菌活性値Rが2.0未満(抗菌活性なし)
各実施例および各比較例のブロックイソシアネートの水分散液(ポリイソシアネート成分)と、合成例1で合成した合成例1のポリウレタン樹脂の水分散液(ポリオール成分)とを混合した。合成例1のポリウレタン樹脂の水分散液の固形分質量に対するブロックイソシアネートの水分散液の固形分質量の割合は、1/6であった。
3:ゲル分率50%以上60%未満。
2:ゲル分率40%以上50%未満。
1:ゲル分率0%以上40%未満。
各実施例および各比較例のブロックイソシアネートの水分散液(ポリイソシアネート成分)と、合成例1のポリウレタン樹脂の水分散液(ポリオール成分)とを混合した。ポリウレタン樹脂の水分散液の固形分質量に対するブロックイソシアネートの水分散液の固形分質量の割合は、1/6であった。
Δb*=b*-b*(0)
2点(△);黄変度の変化量(Δb*)が1以上3未満
1点(×);黄変度の変化量(Δb*)が3以上
D-131N;キシリレンジイソシアネート(XDI)のイソシアヌレート誘導体、商品名:タケネートD-131N、固形分75質量%、イソシアネート基含有量13.7%、三井化学社製
D-170N;ヘキサメチンジイソシアネート(HDI)のイソシアヌレート誘導体、商品名:タケネートD-170N、固形分100質量%、イソシアネート基含有量20.7%、三井化学社製
D-127N;1,3-ビス(イソシアナトメチル)シクロヘキサン(1,3-H6XDI)のイソシアヌレート、商品名:タケネートD-127N、固形分75質量%、イソシアネート基含有量13.5%、三井化学社製
D-370N;ペンタメチレンジイソシアネート(PDI)のイソシアヌレート、商品名:スタビオD-370N、固形分100質量%、イソシアネート基含有量25%、三井化学社製
D-204;トリレンジイソシアネート(TDI)のイソシアヌレート、商品名:タケネートD-204、固形分50質量%、イソシアネート基含有量7.5%、三井化学社製D-110N;キシリレンジイソシアネート(XDI)のトリメチロールプロパン(TMP)付加体、商品名:タケネートD-110N、固形分75質量%、イソシアネート基含有量11.5%、三井化学社製
TMG;1,1,3,3-テトラメチルグアニジン
DMAE;ジメチルアミノエタノール
DMP;3,5-ジメチルピラゾール
MEKO;メチルエチルケトンオキシム
IMZ;イミダゾール
DiPA;ジイソプロピルアミン
MeOPEG;メトキシポリオキシエチレングリコール、メトキシPEG1000、親水性化合物
実施例1の抗菌剤を水で希釈し、抗菌剤希釈液を得た。抗菌剤希釈液の固形分濃度は、0.84質量%であった。次いで、上記の抗菌剤希釈液に、抗菌試験用標準布(綿)(一般社団法人 繊維評価技術協議会製)を浸漬した。次いで、抗菌試験用標準布を、抗菌剤希釈液から引き上げた。また、抗菌試験用標準布を、ウエットピックアップ100%となるように絞った。また、抗菌試験用標準布を、暗所に静置して、常温(25℃)で24時間乾燥させた。その後、乾燥後の抗菌試験用標準布を、170℃の加熱炉で3分間乾燥させた。これにより、抗菌加工試験布を得た。
Claims (10)
- ブロックイソシアネートを含む抗菌剤であり、
前記ブロックイソシアネートは、
ポリイソシアネートの封止残基(A)と、
抗菌性-非ブロック封止基(B)と、
非抗菌性-ブロック封止基(C)とを備え、
前記ポリイソシアネートの封止残基(A)は、複数のイソシアネート基を有するポリイソシアネートのイソシアネート基が封止されてなり、
前記抗菌性-非ブロック封止基(B)は、複数の前記イソシアネート基の少なくとも一部が再生不能に封止されてなり、
前記非抗菌性-ブロック封止基(C)は、複数の前記イソシアネート基の少なくとも一部が再生可能に封止されてなり、
前記抗菌性-非ブロック封止基(B)は、4級アンモニウム基を含む、抗菌剤。 - 前記ブロックイソシアネートが、さらに、抗菌性-ブロック封止基(D)を備え、
前記抗菌性-ブロック封止基(D)は、複数の前記イソシアネート基の少なくとも一部が再生可能に封止されてなり、
前記抗菌性-ブロック封止基(D)は、3級アンモニウム塩を含む、請求項1に記載の抗菌剤。 - 前記ブロックイソシアネートが、さらに、親水性基(E)を備え、
前記親水性基(E)は、複数の前記イソシアネート基の少なくとも一部が再生不能に封止されてなり、
前記親水性基(E)は、ポリオキシエチレン基を含む、請求項1に記載の抗菌剤。 - 前記ブロックイソシアネートが、4級化処理されていない、請求項1に記載の抗菌剤。
- 前記ブロックイソシアネートは、原料成分の反応生成物であり、
原料成分が、
複数のイソシアネート基を有し、前記封止残基(A)を形成するためのポリイソシアネート(a)と、
複数の前記イソシアネート基の少なくとも一部と反応し、前記抗菌性-非ブロック封止基(B)を形成するための抗菌性-非ブロック封止剤(b)と、
複数の前記イソシアネート基の少なくとも一部と反応し、前記非抗菌性-ブロック封止基(C)を形成するための非抗菌性-ブロック封止剤(c)とを含み、
前記抗菌性-非ブロック封止剤(b)が、4級アンモニウム基含有化合物を含む、請求項1に記載の抗菌剤。 - 前記抗菌性-非ブロック封止剤(b)の割合が、前記ポリイソシアネート(a)のイソシアネート基100モルに対して、5モル以上である、請求項5に記載の抗菌剤。
- 前記4級アンモニウム基含有化合物が、トリアルキルアルカノールアンモニウム化合物を含む、請求項5に記載の抗菌剤。
- 前記原料成分が、さらに、
複数の前記イソシアネート基の少なくとも一部と反応し、3級アミノ基を付加するための3級アミノ基含有化合物(d1)と、
前記3級アミノ基の少なくとも一部を中和し、3級アンモニウム塩を形成するための酸(d2)と
を含む、請求項5に記載の抗菌剤。 - 前記原料成分が、さらに、親水性化合物(e)を含み、
前記親水性化合物(e)が、ポリオキシエチレン化合物を含む、請求項5に記載の抗菌剤。 - 前記ポリイソシアネートが、芳香脂肪族ポリイソシアネート誘導体を含む、請求項1に記載の抗菌剤。
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| WO2017038863A1 (ja) * | 2015-08-31 | 2017-03-09 | 大榮産業株式会社 | ブロックイソシアネート組成物、プレポリマー組成物及びそれらの製造方法、並びに、ブロックイソシアネート組成物の熱解離性ブロック剤 |
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| CN112281494B (zh) * | 2020-10-21 | 2022-03-11 | 江苏海洋大学 | 一种封闭型聚氨酯预聚物在制备纤维素基功能敷料中的应用 |
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| TW202345700A (zh) | 2023-12-01 |
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