WO2023074513A1 - 水性インクジェットインク用バインダー、水性インクジェットインク、及び印刷層 - Google Patents
水性インクジェットインク用バインダー、水性インクジェットインク、及び印刷層 Download PDFInfo
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- WO2023074513A1 WO2023074513A1 PCT/JP2022/039034 JP2022039034W WO2023074513A1 WO 2023074513 A1 WO2023074513 A1 WO 2023074513A1 JP 2022039034 W JP2022039034 W JP 2022039034W WO 2023074513 A1 WO2023074513 A1 WO 2023074513A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/006—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/006—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00
- C08F283/008—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00 on to unsaturated polymers
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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
- C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
- C08G18/0819—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups
- C08G18/0823—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups containing carboxylate salt groups or groups forming them
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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
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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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
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- C08G18/22—Catalysts containing metal compounds
- C08G18/24—Catalysts containing metal compounds of tin
- C08G18/244—Catalysts containing metal compounds of tin tin salts of carboxylic acids
- C08G18/246—Catalysts containing metal compounds of tin tin salts of carboxylic acids containing also tin-carbon bonds
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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
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- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3225—Polyamines
- C08G18/3228—Polyamines acyclic
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- C08G18/3231—Hydrazine or derivatives thereof
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- C—CHEMISTRY; METALLURGY
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
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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
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- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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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
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- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/67—Unsaturated compounds having active hydrogen
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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
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- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
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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
- C08G18/752—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
- C08G18/753—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 one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—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 one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
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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
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- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/758—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing two or more cycloaliphatic rings
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- C—CHEMISTRY; METALLURGY
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- C08L75/04—Polyurethanes
- C08L75/12—Polyurethanes from compounds containing nitrogen and active hydrogen, the nitrogen atom not being part of an isocyanate group
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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- C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/322—Pigment inks
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
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- D—TEXTILES; PAPER
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- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
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- D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/30—Ink jet printing
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Definitions
- the present invention relates to a binder for water-based inkjet inks, water-based inkjet inks, and printing layers.
- An inkjet (IJ) recording device is a printing method in which small droplets of an ink composition are ejected and adhered to a recording medium such as paper for printing.
- IJ printers Upon the backdrop of increasing demand for on-demand printing, the use of IJ printers has rapidly expanded in recent years for industrial wide format applications, textile applications, flexible packaging applications, and the like.
- the problem to be solved by the present invention is to provide a binder for water-based inkjet inks that gives prints with excellent abrasion resistance and washing resistance.
- the present invention provides a binder for an aqueous inkjet ink containing a composite resin (A) and an aqueous medium (B), wherein the composite resin (A) includes a shell portion containing a polyurethane (a1) having an acid group and and a binder for water-based inkjet inks, characterized by forming core-shell type particles having a core portion containing a polymer (a2) containing an aliphatic conjugated diene as an essential raw material.
- the composite resin (A) includes a shell portion containing a polyurethane (a1) having an acid group and and a binder for water-based inkjet inks, characterized by forming core-shell type particles having a core portion containing a polymer (a2) containing an aliphatic conjugated diene as an essential raw material.
- the binder for water-based inkjet inks of the present invention can be suitably used for printing on various recording media because it is excellent in the abrasion resistance of printed materials such as plain paper, coated paper, and films, and the washing resistance of fabrics.
- the binder for aqueous inkjet ink of the present invention is a binder for aqueous inkjet ink containing a composite resin (A) and an aqueous medium (B), wherein the composite resin (A) contains a polyurethane (a1) having an acid group. and a core containing a polymer (a2) containing an aliphatic conjugated diene as an essential raw material.
- the core-shell type particles of the composite resin (A) have a form in which the polyurethane (a1) partially or entirely covers the polymer (a2), and in the aqueous medium (B) Distributed is preferred.
- the polyurethane (a1) constituting the shell portion of the composite resin (A) is obtained by a reaction between a polyol and a polyisocyanate. , can be easily introduced into the polyurethane (a1) by using a polyol having an acid group.
- the polyol having an acid group includes a diol having a carboxyl group or a sulfonic acid group, and preferably includes a diol having a carboxyl group.
- the diol having a carboxyl group include 2,2-dimethylolpropionic acid, 2,2-dimethylolbutanoic acid, 2,2-dimethylolbutyric acid, and 2,2-dimethylolvaleric acid. Among these, 2,2-dimethylolpropionic acid is preferred.
- a polyester polyol having a carboxyl group obtained by reacting the polyol having the carboxyl group with various polycarboxylic acids can also be used.
- polycarboxylic acid examples include aliphatic polycarboxylic acids such as succinic acid, adipic acid, sebacic acid and dodecanedicarboxylic acid; alicyclic polycarboxylic acids such as 1,4-cyclohexanedicarboxylic acid and cyclohexanetricarboxylic acid; terephthalic acid, Aromatic polycarboxylic acids such as isophthalic acid, phthalic acid and naphthalenedicarboxylic acid; and acid anhydrides thereof. These polyols can be used alone or in combination of two or more.
- polyol having a sulfonic acid group examples include dicarboxylic acids such as 5-sulfoisophthalic acid, sulfoterephthalic acid, 4-sulfophthalic acid, and 5[4-sulfophenoxy]isophthalic acid, salts thereof, and the aromatic structure.
- polyester polyol obtained by reacting with a low-molecular-weight polyol exemplified as usable for the production of polyester polyol having These polyols can be used alone or in combination of two or more.
- polystyrene resins examples include polyether polyols, polyester polyols, and polycarbonate polyols.
- polyether polyol examples include those obtained by addition polymerization of alkylene oxide using one or more compounds having two or more active hydrogen atoms as an initiator.
- the initiator examples include ethylene glycol, diethylene glycol, triethylene glycol, trimethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,4- butanediol, 1,6-hexanediol, neopentyl glycol, glycerin, trimethylolethane, trimethylolpropane, sorbitol, sucrose, aconite sugar, trimellitic acid, hemimellitic acid, phosphoric acid, ethylenediamine, diethylenetriamine, triisopropanolamine, pyrogallol, dihydroxybenzoic acid, hydroxyphthalic acid, 1,2,3-propanetrithiol and the like.
- alkylene oxide examples include ethylene oxide, propylene oxide, butylene oxide, styrene oxide, epichlorohydrin, tetrahydrofuran, and the like.
- polyester polyols examples include aliphatic polyester polyols and aromatic polyester polyols obtained by esterification reaction of low molecular weight polyols and polycarboxylic acids, and ring-opening polymerization reaction of cyclic ester compounds such as ⁇ -caprolactone. and polyesters obtained by the above methods, copolymerized polyesters thereof, and the like.
- low-molecular-weight polyols used for producing the polyester polyol include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1,2-propanediol, 1,3-propanediol, dipropylene glycol, and tripropylene.
- polycarboxylic acid examples include aliphatic polycarboxylic acids such as succinic acid, adipic acid, sebacic acid and dodecanedicarboxylic acid; alicyclic polycarboxylic acids such as 1,4-cyclohexanedicarboxylic acid and cyclohexanetricarboxylic acid. aromatic polycarboxylic acids such as terephthalic acid, isophthalic acid, phthalic acid and naphthalenedicarboxylic acid; and anhydrides or esters thereof.
- aliphatic polycarboxylic acids such as succinic acid, adipic acid, sebacic acid and dodecanedicarboxylic acid
- alicyclic polycarboxylic acids such as 1,4-cyclohexanedicarboxylic acid and cyclohexanetricarboxylic acid.
- aromatic polycarboxylic acids such as terephthalic acid, isophthalic acid, phthalic acid and naphthal
- polycarbonate polyol for example, one obtained by reacting a carbonate ester and a polyol, or one obtained by reacting phosgene with bisphenol A or the like can be used.
- carbonate ester methyl carbonate, dimethyl carbonate, ethyl carbonate, diethyl carbonate, cyclocarbonate, diphenyl carbonate, and the like can be used.
- polyols that can react with the carbonate ester include ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, dipropylene glycol, 1,4-butanediol, 1,3 -butanediol, 1,2-butanediol, 2,3-butanediol, 1,5-pentanediol, 1,5-hexanediol, 2,5-hexanediol, 1,6-hexanediol, 1,7- heptanediol, 1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, 1,11-undecanediol, 1,12-dodecanediol, 3-methyl-1,5-pentanediol, 2 -ethyl-1,3-hexanediol, 2-
- the amount of the acid group-containing polyol to be used is preferably 3 to 50% by mass based on the total amount of the polyol used in the production of the polyurethane (a1).
- polyisocyanate examples include aromatic diisocyanates such as phenylene diisocyanate, tolylene diisocyanate, diphenylmethane diisocyanate and naphthalene diisocyanate; Diisocyanates having an aliphatic or cycloaliphatic structure such as diisocyanate may be mentioned, but diisocyanates having an alicyclic structure are preferred since they further improve the abrasion resistance and wash resistance. These polyisocyanates can be used alone or in combination of two or more.
- the molar ratio (NCO/OH) between the isocyanate group (NCO) contained in the polyisocyanate and the hydroxyl group (OH) contained in the polyol is preferably 0.9-2.
- polyurethane (a1) one obtained by increasing the molecular weight using a chain extender such as polyamine may be used.
- polyamines examples include ethylenediamine, 1,2-propanediamine, 1,6-hexamethylenediamine, piperazine, 2,5-dimethylpiperazine, isophoronediamine, 4,4'-dicyclohexylmethanediamine, 3,3'- diamines such as dimethyl-4,4′-dicyclohexylmethanediamine and 1,4-cyclohexanediamine; N-hydroxymethylaminoethylamine, N-hydroxyethylaminoethylamine, N-hydroxypropylaminopropylamine, N-ethylaminoethylamine, N - diamines having one primary amino group and one secondary amino group such as methylaminopropylamine; polyamines such as diethylenetriamine, dipropylenetriamine, triethylenetetramine; hydrazine, N,N'-dimethylhydrazine, 1 Hydrazine compounds such as ,6-hexamethylenebishydrazine; Di
- the polyamine is preferably used at an equivalent ratio of 0.8 to 1 between the amino group of the polyamine and the isocyanate group of the urethane prepolymer.
- the chain extension reaction is preferably carried out by mixing the aqueous dispersion with a chain extender such as polyamine after producing an aqueous dispersion of polyurethane.
- the acid value of the polyurethane (a1) is preferably 10 to 70 mgKOH/g, more preferably 15 to 65 mgKOH/g, because the balance between water dispersibility, scratch resistance, and washing resistance is further improved.
- the acid value of the polyurethane (a1) in the present invention is a value obtained by calculation from the raw material composition.
- the weight average molecular weight of the polyurethane (a1) is preferably 10,000 to 500,000, more preferably 10,000 to 300,000, because the balance between water dispersibility, abrasion resistance, and washing resistance is further improved. more preferred.
- the weight average molecular weight and number average molecular weight are values measured by gel permeation chromatography (GPC) using polystyrene as a standard sample.
- the acid groups of the polyurethane (a1) are preferably neutralized with a basic compound because the water dispersibility of the composite resin (A) is further improved.
- Examples of the basic compound include alkylamines such as monomethylamine, dimethylamine, trimethylamine, monoethylamine, diethylamine, triethylamine, monopropylamine, dipropylamine, and tripropylamine; monoethanolamine, diethanolamine, monoisopropanolamine, Diisopropanolamine, N-methylethanolamine, N,N-dimethylethanolamine, N,N-diethylethanolamine, 2-amino-2-methylpropanol, 2-(dimethylamino)-2-methylpropanol, N-methyl Alkanolamines such as diethanolamine; organic amines such as polyvalent amines such as ethylenediamine, diethylenetriamine, triethylenetetramine and tetraethylenepentamine; metal hydroxides such as ammonia (water), sodium hydroxide, potassium hydroxide and lithium hydroxide etc., but metal hydroxides are preferred, and potassium hydroxide is more preferred, since they further improve scratch resistance and
- the polymer (a2) constituting the core portion of the composite resin (A) is obtained by a polymerization reaction of an aliphatic conjugated diene and, if necessary, other unsaturated monomers.
- Examples of the aliphatic conjugated dienes include 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, 1,3-hexadiene, 1,3-heptadiene, 2, 3-dimethylbutadiene, 3-methyl-1,3-pentadiene, 2-chloro-1,3-butadiene, etc., but 1,3-butadiene is preferred because it further improves scratch resistance and washing resistance. , isoprene is preferred. These aliphatic conjugated dienes can be used alone or in combination of two or more.
- Examples of the other unsaturated monomers include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate.
- pentyl (meth)acrylate 3-methylbutyl (meth)acrylate, neopentyl (meth)acrylate, isoamyl (meth)acrylate, hexyl (meth)acrylate, heptyl (meth)acrylate, octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate ) acrylate, isooctyl (meth)acrylate, nonyl (meth)acrylate, dodecyl (meth)acrylate, tridecyl (meth)acrylate, stearyl (meth)acrylate, isostearyl (meth)acrylate, hexadecyl (meth)acrylate, etc.
- (meth)acrylate refers to one or both of methacrylate and acrylate.
- the aliphatic conjugated diene in the monomer raw material of the polymer (a2) is preferably 50% by mass or more, more preferably 70% by mass or more, since the scratch resistance and washing resistance are further improved. % by mass or more is more preferable.
- a polymerization initiator is preferably allowed to coexist when the polymer is polymerized.
- the polymerization initiator 2,2'-azobis(isobutyronitrile), 2,2'-azobis(2-methylbutyronitrile), 2,2'-azobis(2-methylpropionamidine) dihydrochloride
- Azo compounds such as salts, 4,4'-azobis (4-cyano) valeric acid, 2,2'-azobis (2-amidinopropane) dihydrochloride; benzoyl peroxide, tert-butyl hydroperoxide, tert-butyl peroxide oxypivalate, tert-butyl peroxybenzoate, tert-butyl peroxy-2-ethylhexanoate, di-tert-butyl peroxide, di-tert-butyl hydroperoxide, cumene hydroperoxide, benzoyl peroxide, Organic organic compounds such as lauroyl peroxide, decanoy
- the polymerization initiator is preferably 0.005 to 5 parts by mass, more preferably 0.01 to 1 part by mass, and 0.02 parts by mass with respect to a total of 100 parts by mass of the monomer raw materials of the polymer (a2). ⁇ 0.2 parts by mass is more preferable.
- the mass ratio (a1/a2) of the polyurethane (a1) and the polymer (a2) is preferably 95/5 to 50/50, more preferably 90/10, because the abrasion resistance and washing resistance are further improved. ⁇ 65/35 is more preferred.
- Examples of the aqueous medium (B) include water, organic solvents miscible with water, and mixtures thereof.
- water-miscible organic solvents include alcohol solvents such as methanol, ethanol, n-propanol, isopropyl alcohol, 1,2-propylene glycol and 1,3-butylene glycol; ketone solvents such as acetone and methyl ethyl ketone; and ethylene glycol.
- lactam solvents such as N-methyl-2-pyrrolidone and N-ethyl-2-pyrrolidone
- amide solvents such as N,N-dimethylformamide
- ketone solvents are preferred.
- the aqueous medium (B) is preferably water alone or a mixture of water and an organic solvent miscible with water, more preferably water alone, in consideration of safety and environmental load reduction.
- the content of water is preferably 50% by mass or more, more preferably 70% by mass or more, in the aqueous medium (B).
- the content of the aqueous medium (B) is preferably 30 to 80% by mass, more preferably 50 to 70% by mass, in the aqueous inkjet ink binder.
- the binder for water-based inkjet ink of the present invention further includes additives (C) such as cross-linking agents, plasticizers, antistatic agents, waxes, surfactants, light stabilizers, flow modifiers, dyes, leveling agents, and rheology control agents. agents, ultraviolet absorbers, antioxidants, photocatalytic compounds, preservatives, viscosity modifiers, pH modifiers, chelating agents, and the like.
- additives such as cross-linking agents, plasticizers, antistatic agents, waxes, surfactants, light stabilizers, flow modifiers, dyes, leveling agents, and rheology control agents.
- agents ultraviolet absorbers, antioxidants, photocatalytic compounds, preservatives, viscosity modifiers, pH modifiers, chelating agents, and the like.
- the content of the additive (C) is preferably 20 parts by mass or less, more preferably 10 parts by mass or less, relative to 100 parts by mass of the composite resin (A).
- the composite resin (A) is obtained by polymerizing the monomer raw materials of the polymer (a2) in the presence of the polyurethane (a1).
- the binder for water-based inkjet ink of the present invention is obtained by, for example, neutralizing some or all of the acid groups of the polyurethane (a1) with a basic compound, Step (I) of producing an aqueous dispersion of the polyurethane (a1) by dispersing in the aqueous dispersion of the polyurethane (a1), then, in the resulting aqueous dispersion of the polyurethane (a1), an resulting aqueous dispersion of the polyurethane (a1), an aliphatic conjugated diene and optionally It can be obtained by the step (II) of supplying other unsaturated monomers and carrying out radical polymerization.
- the hydrophobic aliphatic conjugated diene is incorporated into the particles of the polyurethane (a1), the shell portion containing the polyurethane (a1) and the core portion containing the acrylic polymer (a2) are separated.
- Core-shell type particles having Moreover, in the case of the radical polymerization, if necessary, the additive (C) may coexist, or the additive (C) may be added after the polymerization reaction.
- the water-based inkjet ink of the present invention contains the above-described binder for water-based inkjet ink and a colorant, and further includes an organic solvent, a surface conditioner, a pigment dispersant, a drying inhibitor, a penetrant, a surfactant, and the like. may contain.
- the coloring agent includes dyes and pigments, and preferably contains pigments.
- pigment for example, compounds classified as pigments in the Color Index (published by The Society of Dyers and Colorists) can be used, including inorganic pigments and organic pigments.
- inorganic pigment examples include iron oxide; carbon black (carbon black produced by contact method, furnace method, thermal method, etc.); titanium oxide, and the like.
- Examples of the carbon black include #2300, #2200B, #990, #900, #960, #980, #33, #40, #45, #45L, #52, HCF88, MA7, MA8, MA100 ( Above, manufactured by Mitsubishi Chemical Corporation); Raven series (5750, 5250, 5000, 3500, 1255, 700, etc.) (above, manufactured by Columbia); Regal series (400R, 330R, 660R, etc.), Mogul series (L, 700) etc.), Monarch series (800, 880, 900, 1000, 10, 1300, 1400, etc.) (manufactured by Cabot Corporation); Color Black series (FW1, FW2, FW2V, FW18, FW200, S150, S160, S1), Printex series (35, U, V, 1400U, etc.), Special Black series (6, 5, 4, 4A, etc.), NIPEX series (150, 160, 170, 180, 95, 90, 85, 80, 75, etc.) (manufactured by Orion Engineere
- azo pigments such as azo lake pigments, insoluble azo pigments, condensed azo pigments, and chelate azo pigments; phthalocyanine pigments, perylene pigments, and perinone pigments; , anthraquinone pigments, quinacridone pigments, dioxazine pigments, thioindigo pigments, isoindoline pigments, quinophthalone pigments; dye chelates such as basic dye chelates and acid dye chelates; nitro pigments; nitroso pigments; aniline black, etc. is mentioned.
- azo pigments such as azo lake pigments, insoluble azo pigments, condensed azo pigments, and chelate azo pigments
- phthalocyanine pigments such as azo lake pigments, insoluble azo pigments, condensed azo pigments, and chelate azo pigments
- phthalocyanine pigments such as azo lake pigments, insoluble azo pigments, condensed azo
- Cyan pigments such as Pigment Blue 1, 2, 3, 15, 15:1, 15:2, 15:3, 15:4, 15:6, 16, 22, 60, 63, 66; C.
- Orange pigments such as Pigment Orange 5, 13, 16, 17, 34, 36, 43, 51, 64, 71;
- Violet pigments such as Pigment Violet 1, 3, 5:1, 16, 19, 23, 38;
- Green pigments such as Pigment Green 1, 4, 7, 8, 10, 17, 18, 36; C. I.
- the primary particle size of the pigment is preferably 25 ⁇ m or less, more preferably 10 ⁇ m or less, and still more preferably 1 ⁇ m or less from the viewpoint of dispersibility, and may be, for example, 10 m or more and 30 nm or more from the viewpoint of stability. .
- the primary particle size can be measured with a transmission electron microscope (TEM).
- the volume average particle diameter of the pigment is preferably 1 ⁇ m or less, more preferably 250 nm or less, and even more preferably 200 nm or less. good.
- the volume average particle size of the pigment can be measured by a laser diffraction method.
- the content of the pigment in the colorant is preferably 80% by mass or more, more preferably 9% by mass or more, and still more preferably 95% by mass or more, and the upper limit is 100% by mass.
- the content of the colorant is preferably 1% by mass or more, more preferably 5% by mass or more, still more preferably 10% by mass or more, and preferably 90% by mass or less, based on the solid content of the inkjet ink composition. More preferably 80% by mass or less, still more preferably 70% by mass or less.
- the pigment dispersant is a compound having a hydrophilic portion and a hydrophobic portion, and has the effect of improving the dispersibility of the pigment in the aqueous medium.
- the pigment dispersant include styrene-(meth)acrylic acid copolymer, styrene-(meth)acrylic acid ester-(meth)acrylic acid copolymer, and (meth)acrylic acid ester-(meth)acrylic acid copolymer.
- Styrene-acrylic acid copolymers such as coalescence, and the like.
- a basic compound such as potassium hydroxide may coexist in the aqueous pigment dispersion.
- the content of the pigment dispersant is preferably 5 parts by mass or more, more preferably 10 parts by mass or more, still more preferably 20 parts by mass or more, and preferably 100 parts by mass or less with respect to 100 parts by mass of the colorant. , more preferably 70 parts by mass or less, and still more preferably 50 parts by mass or less.
- the organic solvent is preferably a hydrophilic organic solvent (organic solvent miscible with water at 25° C.).
- ketone solvents such as acetone, methyl ethyl ketone, methyl butyl ketone, and methyl isobutyl ketone; methanol, ethanol, Alcohol solvents such as 1-propanol, 2-propanol, 2-methyl-1-propanol, 1-butanol, 2-butanol, pentyl alcohol, 2-methoxyethanol; tetrahydrofuran, 1,4-dioxane, 1,2-dimethoxyethane Ether solvents such as dimethylformamide, amide solvents such as N-methylpyrrolidone; Glycol solvents such as ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, polyethylene glycol, polypropylene glycol; butanediol, Diol solvents such as
- the organic solvent is preferably 1 to 300 parts by mass, more preferably 4 to 200 parts by mass with respect to 100 parts by mass of the pigment.
- a colorant dispersion is prepared in advance by mixing and dispersing the colorant, the pigment dispersant, the organic solvent, the aqueous medium, and an optional basic compound, and It can be produced by mixing additives such as the resin composition, a drying inhibitor, a penetrant, and a surfactant.
- examples of the mixing and dispersing method include a wet dispersing method and a kneading dispersing method, with the wet dispersing method being preferred.
- drying inhibitor it is preferable to use one that is miscible with an aqueous medium and has an effect of preventing clogging of the head of an inkjet printer.
- examples include glycerin, ethylene glycol, diethylene glycol, triethylene glycol, and triethylene.
- Glycol mono-n-butyl ether polyethylene glycol with a molecular weight of 2000 or less, propylene glycol, dipropylene glycol, tripropylene glycol, 1,3-propylene glycol, isopropylene glycol, isobutylene glycol, 1,4-butanediol, 1,3- butanediol, 1,5-pentanediol, 1,6-hexanediol, mesoerythritol, pentaerythritol, and the like.
- glycerin and triethylene glycol as the drying inhibitor because they are highly safe and can impart excellent effects to ink drying property and ejection performance.
- the content of the drying inhibitor is preferably 3 to 50% by mass in the water-based inkjet ink.
- the penetrant examples include lower alcohols such as ethanol and isopropyl alcohol; glycol monoethers of alkyl alcohols such as ethylene glycol hexyl ether, diethylene glycol butyl ether, and propylene glycol propyl ether.
- the content of the penetrant is 0.01 to 10% by mass in the water-based inkjet ink from the viewpoint of improving the penetrability of the ink into the recording medium and adjusting the dot diameter of the ink on the recording medium. is preferred.
- surfactant examples include anionic surfactants, nonionic surfactants, cationic surfactants, and amphoteric surfactants. Surfactants and nonionic surfactants are preferred.
- anionic surfactants include alkylbenzenesulfonates, alkylphenylsulfonates, alkylnaphthalenesulfonates, higher fatty acid salts, sulfuric acid ester salts of higher fatty acid esters, sulfonates of higher fatty acid esters, and higher alcohol ethers. Sulfuric acid ester salts and sulfonates, higher alkyl sulfosuccinates, polyoxyethylene alkyl ether carboxylates, polyoxyethylene alkyl ether sulfates, alkyl phosphates, polyoxyethylene alkyl ether phosphates, etc.
- nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters, and glycerin fatty acid esters.
- polyoxyethylene glycerin fatty acid ester polyglycerin fatty acid ester, sucrose fatty acid ester, polyoxyethylene alkylamine, polyoxyethylene fatty acid amide, fatty acid alkylolamide, alkylalkanolamide, acetylene glycol, oxyethylene adduct of acetylene glycol, Polyethylene glycol polypropylene glycol block copolymers and the like may be mentioned, among these are polyoxyethylene nonylphenyl ether, polyoxyethylene octylphenyl ether, polyoxyethylene dodecylphenyl ether, polyoxyethylene alkyl ethers, polyoxyethylene fatty acid esters.
- sorbitan fatty acid esters polyoxyethylene sorbitan fatty acid esters, fatty acid alkylolamides, acetylene glycol, oxyethylene adducts of acetylene glycol, polyethylene glycol polypropylene glycol block copolymers are preferred.
- surfactants include silicone-based surfactants such as polysiloxane oxyethylene adducts; fluorine-based surfactants such as perfluoroalkyl carboxylates, perfluoroalkyl sulfonates, and oxyethylene perfluoroalkyl ethers. spiculisporic acid, rhamnolipids, biosurfactants such as lysolecithin, and the like may also be used.
- the content of the surfactant in the water-based inkjet ink is preferably 0.001 to 2% by mass, more preferably 0.001 to 1%, from the viewpoint of effectively preventing bleeding of printed images and the like. 0.5 mass %, more preferably 0.01 to 1 mass %.
- Aqueous ink for inkjet recording can be used for printing on various recording media.
- the recording medium include absorptive recording media such as copy paper (PPC paper) commonly used in copiers, recording media having an ink absorbing layer, and non-absorbent recording media that do not absorb ink. Recording media, non-absorbent recording media with low ink absorbency, fabrics, films, and the like can be used.
- the binder for water-based inkjet ink of the present invention is useful for printing on various recording media because it is excellent in storage stability, jettability, and abrasion resistance and washing resistance of printed matter.
- the present invention will be described in more detail below with specific examples.
- the weight average molecular weight and average particle size are measured under the following measurement conditions.
- Measuring device high-speed GPC device ("HLC-8220GPC” manufactured by Tosoh Corporation) Column: The following columns manufactured by Tosoh Corporation were connected in series and used. "TSKgel G5000" (7.8mm I.D. x 30cm) x 1 "TSKgel G4000” (7.8mm I.D. x 30cm) x 1 "TSKgel G3000” (7.8mm I.D. x 30cm) x 1 Book “TSKgel G2000" (7.8 mm I.D.
- particle size measurement conditions After diluting the binder for water-based inkjet ink with water to obtain a diluted dispersion having a concentration of 0.1% by mass, the diluted dispersion was measured by a particle size measuring device ("Nanotrack Wave II" manufactured by Microtrack Bell Co., Ltd.: calculated by a dynamic light scattering method), and the 50% median diameter was taken as the average particle diameter.
- methyl ethyl ketone (MEK) was added so that the solid content concentration was 60% by mass, stirred for 30 minutes, and cooled to 40° C. or lower to obtain a urethane prepolymer solution.
- 5.0 parts by mass of potassium hydroxide was added to the obtained urethane prepolymer solution to neutralize the acid groups.
- ion-exchanged water was added under strong stirring so that the solid content concentration became 18%, and the polyurethane was emulsified.
- MEK was distilled off under reduced pressure to obtain an aqueous dispersion of polyurethane (a1-1) having an acid group.
- the non-volatile content of this aqueous dispersion was 30% by mass.
- Table 1 shows the formulations of the polyurethanes (a1-1) to (a1-6) having acid groups obtained above.
- Example 1 Production of binder (1) for water-based inkjet ink
- aqueous dispersion of polyurethane (a1-1) having an acid group obtained in Production Example 1 236.59 parts by mass of ion-exchanged water was added, and 29.99 parts by mass of isoprene and 0.01 part by mass of styrene were prepared.
- Part is reacted with 0.01 part by mass of ammonium persulfate (APS) under the conditions of batch emulsion polymerization of monomers (reaction temperature: 80°C), then concentration is performed to remove unreacted monomers, and the water content is adjusted to 20% by mass.
- APS ammonium persulfate
- a binder (1) for water-based inkjet ink was obtained.
- the mass ratio (a1/a2) was 70/30.
- the particle size distribution of the composite resin showed a single peak, and it was confirmed that core-shell particles were formed, and the average particle size was 40 nm.
- Examples 2 to 6 Production of binders (2) to (6) for water-based inkjet inks
- aqueous dispersion of polyurethane (a1-1) having an acid group used in Example 1 was changed to an aqueous dispersion of polyurethane (a1-2) to (a1-6) having an acid group
- Binders for water-based inkjet inks (2) to (6) were obtained in the same manner as in 1.
- the mass ratios (a1/a2) were all 70/30.
- the particle size distribution of the composite resin showed a single peak, and it was confirmed that core-shell particles were formed.
- the binder for aqueous inkjet ink (4) was 42 nm
- the binder for aqueous inkjet ink (5) was 33 nm
- the binder for aqueous inkjet ink (6) was 38 nm.
- Comparative Example 1 Binder for water-based inkjet ink (R1))
- the aqueous dispersion of polyurethane (a1-1) having an acid group obtained in Production Example 1 was used as a binder (R1) for aqueous inkjet ink.
- the pigment concentration is 15.0% by mass
- the triethylene glycol concentration is 12.0% by mass
- the Proxel-GXL concentration is 0.1% by mass
- An aqueous pigment dispersion having a non-volatile content of 18.2% by mass was obtained.
- Table 2 shows the formulations and evaluation results of the aqueous inkjet ink binders (1) to (5) and (R1) obtained above.
- Comparative Example 1 is an example using a urethane resin that does not contain latex (a2), which is an essential component of the present invention, but it was confirmed that the resulting printed material was inferior in abrasion resistance and washing resistance.
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Abstract
Description
シクロペンチル(メタ)アクリレート、シクロヘキシル(メタ)アクリレート、イソボルニル(メタ)アクリレート等の炭素原子数6~20のシクロアルキル(メタ)アクリレート;
フェニル(メタ)アクリレート等のアリル(メタ)アクリレート;
ベンジル(メタ)アクリレート、フェネチル(メタ)アクリレート等の炭素原子数10~20のアラルキル(メタ)アクリレート;
フェノキシエチル(メタ)アクリレート等のアリルオキシアルキル(メタ)アクリレート;
クロトン酸メチル、クロトン酸エチル等のクロトン酸アルキルエステル;
ジメチルマレート、ジブチルマレート、ジメチルフマレート、ジブチルフマレート、ジメチルイタコネート、ジブチルイタコネート等の不飽和ジカルボン酸アルキルエステル;
スチレン、p-tert-ブチルスチレン、α-メチルスチレン、ビニルトルエン、ビニルピリジン、クロロスチレン、クロロメチルスチレン等の芳香族ビニルモノマー;
(メタ)アクリロニトリル、クロトノニトリル、(メタ)アクリルアミド、N-メチル(メタ)アクリルアミド、N-イソプロピル(メタ)アクリルアミド、N-ヒドロキシエチル(メタ)アクリルアミド、N-メチロール(メタ)アクリルアミド、N-メトキシエチル(メタ)アクリルアミド、N,N-ジメチル(メタ)アクリルアミド、N,N-ジエチル(メタ)アクリルアミド、N,N-ジメチルアミノエチル(メタ)アクリレート、N,N-ジメチルアミノプロピル(メタ)アクリルアミド、N,N-ジエチルアミノエチル(メタ)アクリレート、N,N-ジエチルアミノプロピル(メタ)アクリレート、N-(メタ)アクリロイルモルホリン、N-(メタ)アクリロイルピロリジン、N-ビニルホルムアミド、N-ビニルピロリドン、N-ビニルイミダゾール、N-ビニルカルバゾール、N-ビニルキノリン、N-ビニルピペリジン等の窒素原子含有モノマー(好ましくは1置換又は2置換の(メタ)アクリルアミド(置換基が結合して環を形成しているものも含む))及び該窒素原子含有モノマーの塩化メチル塩;
フッ化ビニル、フッ化ビニリデン、テトラフルオロエチレン、クロロトリフルオロエチエレン、ヘキサフルオロプロピレン、塩化ビニル、塩化ビニリデン等のハロゲン化オレフィン;エチレン、プロピレン、イソブチレン、1-ブテン等のα-オレフィン;
酢酸ビニル、プロピオン酸ビニル、ピバリン酸ビニル、バーサティック酸ビニル、安息香酸ビニル、ネオデカン酸ビニル等のカルボン酸ビニルエステル;
メチルビニルエーテル、エチルビニルエーテル、n-ブチルビニルエーテル、イソブチルビニルエーテル等のアルキルビニルエーテル;シクロヘキシルビニルエーテル等のシクロアルキルビニルエーテル;
アクロレイン、メチルビニルケトン等のカルボニル基含有モノマー;
ポリエチレングリコール(メタ)アクリレート、メトキシポリエチレングリコール(メタ)アクリレート、ポリエチレングリコールポリプロピレングリコール共重合(メタ)アクリレート、メトキシポリエチレングリコールポリプロピレングリコール共重合(メタ)アクリレート、ポリエチレングリコールポリテトラメチレングリコール共重合(メタ)アクリレート、メトキシポリエチレングリコールポリテトラメチレングリコール共重合(メタ)アクリレート等のポリオキシエチレン基含有(メタ)アクリルモノマー;
パーフルオロシクロヘキシル(メタ)アクリレート、ジ-パーフルオロシクロヘキシルフマレート、N-イソプロピルフルオロオクタンスルフォン酸アミドエチル(メタ)アクリレート等のフルオロアルキル基含有モノマー;
無水マレイン酸、無水シトラコン酸、無水メサコン酸、無水イタコン酸、テトラヒドロ無水フタル酸等の不飽和ジカルボン酸類無水物;
グリシジル(メタ)アクリレート、アリルグリシジルエーテル、テトラヒドロフルフリル(メタ)アクリレート等の環状エーテル含有モノマー;
ビニリトリクロロシラン、ビニルトリエトキシシラン、ビニルトリス(β-メトキシエトキシ)シラン、γ-(メタ)アクリロキシプロピルトリメトキシシラン等のシリル基含有モノマー;
2-ヒドロキシエチル(メタ)アクリレート、2-ヒドロキシプロピル(メタ)アクリレート、2-ヒドロキシブチル(メタ)アクリレート、4-ヒドロキシブチル(メタ)アクリレート、2-ヒドロキシエチルビニルエーテル、4-ヒドロキシブチルビニルエーテル、2-ヒドロキシエチルアリルエーテル等のヒドロキシ基含有モノマー;
ビニルスルホン酸、3-アクリロキシプロパン-1-スルホン酸、3-アクリロキシオクチルオキシベンゼンスルホン酸、3-アクリロキシベンゼンジアゾスルホン酸、3-アクリロキシアゾベンゼン-4’-スルホン酸、2-アクリロイルアミノ-2-メチルプロパン-1-スルホン酸、2-アクリロイルアミド-2-メチルプロパンスルホン酸、アクリロニトリル-tert-ブチルスルホン酸等のビニル基含有スルホン酸化合物並びにそれらの塩;
などが挙げられる。なお、これらの単量体は単独で用いることも2種以上併用することもできる。
C.I.ピグメントイエロー1、2、12、13、14、16、17、73、74、75、83、93、95、97、98、109、110、114、120、128、129、138、150、151、154、155、174、180、185等のイエロー顔料;
C.I.ピグメントレッド5、7、12、48(Ca)、48(Mn)、57(Ca)、57:1、112、122、123、146、150、168、176、184、185、202、209、213、269、282等のマゼンダ顔料;
C.I.ピグメントブルー1、2、3、15、15:1、15:2、15:3、15:4、15:6、16、22、60、63、66等のシアン顔料;
C.I.ピグメントオレンジ5、13、16、17、34、36、43、51、64、71等のオレンジ顔料;
C.I.ピグメントバイオレット1、3、5:1、16、19、23、38等のバイオレット顔料;
C.I.ピグメントグリーン1、4、7、8、10、17、18、36等のグリーン顔料;
C.I.ピグメントレッド1、2、3、5、17、22、23、31、38、48:2、48:3、48:4、49:1、52:2、53:1、57:1、60:1、63:1、63:2、64:1、81、83、88、101、104、105、106、108、112、114、122、123、146、149、150、166、168、170、172、177、178、179、184、185、190、193、202、207、208、209、213、219、224、254、264等のレッド顔料などが挙げられる。
測定装置:高速GPC装置(東ソー株式会社製「HLC-8220GPC」)
カラム:東ソー株式会社製の下記のカラムを直列に接続して使用した。
「TSKgel G5000」(7.8mmI.D.×30cm)×1本
「TSKgel G4000」(7.8mmI.D.×30cm)×1本
「TSKgel G3000」(7.8mmI.D.×30cm)×1本
「TSKgel G2000」(7.8mmI.D.×30cm)×1本
検出器:RI(示差屈折計)
カラム温度:40℃
溶離液:テトラヒドロフラン(THF)
流速:1.0mL/分
注入量:100μL(試料濃度4mg/mLのテトラヒドロフラン溶液)
標準試料:下記の単分散ポリスチレンを用いて検量線を作成した。
東ソー株式会社製「TSKgel 標準ポリスチレン A-500」
東ソー株式会社製「TSKgel 標準ポリスチレン A-1000」
東ソー株式会社製「TSKgel 標準ポリスチレン A-2500」
東ソー株式会社製「TSKgel 標準ポリスチレン A-5000」
東ソー株式会社製「TSKgel 標準ポリスチレン F-1」
東ソー株式会社製「TSKgel 標準ポリスチレン F-2」
東ソー株式会社製「TSKgel 標準ポリスチレン F-4」
東ソー株式会社製「TSKgel 標準ポリスチレン F-10」
東ソー株式会社製「TSKgel 標準ポリスチレン F-20」
東ソー株式会社製「TSKgel 標準ポリスチレン F-40」
東ソー株式会社製「TSKgel 標準ポリスチレン F-80」
東ソー株式会社製「TSKgel 標準ポリスチレン F-128」
東ソー株式会社製「TSKgel 標準ポリスチレン F-288」
東ソー株式会社製「TSKgel 標準ポリスチレン F-550」
水性インクジェットインク用バインダーを水で希釈し、濃度0.1質量%の希釈分散体とした後、この希釈分散体を用い、粒子径測定装置(マイクロトラック・ベル株式会社製「ナノトラックWaveII」:動的光散乱法により算出)にて測定し、50%メジアン径を平均粒子径とした。
温度計、攪拌装置、還流冷却管及び窒素導入管を備えた4ッ口フラスコに、メチルエチルケトン 700質量部を仕込み、次いで前記反応容器中にメチルメタクリレート 291質量部と3-メルカプト-1,2-プロパンジオール 8.7質量部と2,2’-アゾビス(2-メチルプロピオニトリル) 0.15質量部を供給し、反応させることによって、数平均分子量3000の片末端に2個の水酸基を有するビニル重合体として、アクリルマクロマー(1)を得た。
温度計、攪拌装置、還流冷却管及び窒素導入管を備えた4つ口フラスコに、PTMG1k(三菱ケミカル製「PTMG1000」;数平均分子量1000のポリテトラメチレンエーテルグリコール)50.9質量部、及び2,2-ジメチロールプロピオン酸(DMPA)12.6質量部を入れ、十分に撹拌させた。次いで、イソホロンジイソシアネート(IPDI)31.5質量部、触媒としてジブチルスズジラウリレート0.01質量部を加え、75℃で4時間反応させた。反応後、メチルエチルケトン(MEK)で固形分濃度が60質量%になるようMEKを入れ、30分撹拌させるとともに、40℃以下まで冷却し、ウレタンプレポリマー溶液を得た。得られたウレタンプレポリマー溶液に水酸化カリウム5.0質量部を加え、酸基を中和させた。次いで強攪拌下で固形分濃度が18%になるようイオン交換水を添加し、ポリウレタンを乳化させた。反応完結後、減圧蒸留によりMEKを留去し、酸基を有するポリウレタン(a1-1)の水分散体を得た。この水分散体の不揮発分は30質量%であった。
原料配合を表1に変更した以外は、製造例1と同様にして、酸基を有するポリウレタン(a1-2)の水分散体を得た。この水分散体の不揮発分は30質量%であった。
原料配合を表1に変更した以外は、製造例1と同様にして、酸基を有するウレタンプレポリマー溶液を得た。得られたウレタンプレポリマー溶液に水酸化カリウム1.9質量部を加え、酸基を中和させた。次いで強攪拌下で固形分濃度が18%になるようイオン交換水を添加し、エチレンジアミンを2.7質量部滴下し、伸長反応を行った。反応完結後、減圧蒸留によりMEKを留去し、酸基を有するポリウレタン(a1-3)の水分散体を得た。この水分散体の不揮発分は30質量%であった。
原料配合を表1に変更した以外は、製造例3と同様にして、酸基を有するポリウレタン(a1-4)の水分散体を得た。この水分散体の不揮発分は30質量%であった。
原料配合を表1に変更した以外は、製造例1と同様にして、酸基を有するポリウレタン(a1-5)の水分散体を得た。この水分散体の不揮発分は30質量%であった。
原料配合を表1に変更した以外は、製造例1と同様にして、酸基を有するポリウレタン(a1-6)の水分散体を得た。この水分散体の不揮発分は30質量%であった。
PTMG1k:三菱ケミカル製「PTMG1000」;数平均分子量1000のポリテトラメチレンエーテルグリコール
Excenol 2020:AGC製「Excenol 2020」;数平均分子量2000のポリプロピレングリコール
UH-100:宇部興産製「ETERNACOLL UH-100」;数平均分子量1000の結晶性ポリカーボネートジオール
UH-200:宇部興産製「ETERNACOLL UH-200」;数平均分子量2000の結晶性ポリカーボネートジオール
G3450J:旭化成製「DURANOL G3450J」;数平均分子量800の非晶性ポリカーボネートジオール
製造例1で得た酸基を有するポリウレタン(a1-1)の水分散体233.40質量部にイオン交換水236.59質量部を加え、イソプレン29.99質量部、及びスチレン0.01質量部を過硫酸アンモニウム(APS)0.01質量部でモノマー一括乳化重合(反応温度80℃)の条件下で反応させて、次に未反応モノマー除去の濃縮を行い、水分量を20質量%に調整し水性インクジェットインク用バインダー(1)を得た。質量比(a1/a2)は、70/30であった。また、複合樹脂の粒度分布は単一のピークを示し、コアシェル粒子を形成していることが確認され、平均粒子径は40nmであった。
実施例1で使用した酸基を有するポリウレタン(a1-1)の水分散体を、酸基を有するポリウレタン(a1-2)~(a1-6)の水分散体に変更した以外は、実施例1と同様にして、水性インクジェットインク用バインダー(2)~(6)を得た。質量比(a1/a2)は、全て70/30であった。また、複合樹脂の粒度分布は単一のピークを示し、コアシェル粒子を形成していることが確認され、平均粒子径は水性インクジェットインク用バインダー(2)が111nm、水性インクジェットインク用バインダー(3)が95nm、水性インクジェットインク用バインダー(4)が42nm、水性インクジェットインク用バインダー(5)が33nm、水性インクジェットインク用バインダー(6)が38nmであった。
製造例1で得た酸基を有するポリウレタン(a1-1)の水分散体を、水性インクジェットインク用バインダー(R1)とした。
ミニプラネタリーミキサー(株式会社愛工舎mini-PLM)の0.5Lジャケット付タンクに、50質量部のC.I.ピグメントレッド122(DIC株式会社製「FASTOGEN Super Magenta RY」)C.I.ピグメントブルー15:3(DIC株式会社製、SBG-SD)、10質量部のスチレン-アクリル酸共重合体(重量平均分子量11,000、酸価180 mgKOH/g)を順番に投入し、ジャケット付タンクの温度を80℃に加温した状態で、自転回転数80rpm、公転回転数25rpmで10分間撹拌した。
次に、ジャケット付タンクの温度を80℃に保温した状態で、5.3質量部の34質量%水酸化カリウム水溶液、30質量部のトリエチレングリコールを前記組成物に加え、自転回転数80rpm、公転回転数25rpmで60分間混練を行うことによって、固形状の混練物を得た。
前記混練物に、イオン交換水100質量部とトリエチレングリコール10質量部を加え、ジューサーミキサーで10分間攪拌混合した。イオン交換水とProxel-GXL(ロンザジャパン株式会社)を混合することによって、顔料濃度が15.0質量%、トリエチレングリコール濃度が12.0質量%、Proxel-GXL濃度が0.1質量%、不揮発分が18.2質量%の水性顔料分散体を得た。
上記で得た顔料分散体20.0質量部、前記水性インクジェット用バインダー3.3質量部、2-ピロリジノン(BASF社製)8.0質量部、トリエチレングリコールモノ-n-ブチルエーテル(東京化成工業株式会社製)8.0質量部、グリセリン(花王株式会社製)3.0質量部、サーフィノール440(非イオン系界面活性剤、エボニックジャパン株式会社製)0.5質量部、イオン交換水57.3質量部を1時間撹拌した。
次に、5質量%水酸化カリウム水溶液を用いpHを9~9.8の範囲内に調整したものを、孔径5~10μmのフィルターでろ過することによって、水性インクジェットインク(顔料濃度3.0%、ウレタン固形分濃度1.0%)を得た。
上記で得た水性インクジェットインクを市販のインクジェットプリンターENVY4500(HP社製)ブランクインクカートリッジに充填し、写真印刷用紙(HPアドバンスフォトペーパー HP社製)の印刷面に印字濃度設定100%のベタ印刷を行った。印刷物を常温下で1分間乾燥した後、学振式摩擦試験機を用いて荷重200gの条件にて印刷士紙と同じ紙で印刷面を3往復摩擦させた。
次に、前記印刷物の印刷面をスキャン処理して画像データ化し、下記の式に基づきピクセル残存率(%)を算出し、下記の基準により、耐擦過性を評価した。
ピクセル残存率(%)=(擦過試験後の着色部のピクセル数)/(擦過試験前の着色部のピクセル数)×100
〇:40%以上
△:20%以上40%未満
×:20%未満
綿ブロード全面を染色後、150℃で5分間乾燥させた。その後JISL0844:2011に基づいて調製した洗濯液を50℃に加温し、前記綿ブロードを浸漬(30分間)させた。次いでフードミキサー中で1分間攪拌させ、取り出した試験用サンプルを水で洗った後乾燥した。積分球分光測色計X-Riteでミキサー攪拌後の綿ブロードの光学濃度(OD)を測定した。下記の式に基づきOD保持率(%)を算出し、下記の基準により、耐洗濯性を評価した。
OD保持率(%)=(攪拌後の綿ブロードのOD)/(洗濯液浸漬前の綿ブロードのOD)×100
〇:50%以上
△:45%以上50%未満
×:45%未満
Claims (5)
- 複合樹脂(A)及び水性媒体(B)を含有する水性インクジェットインク用バインダーであって、前記複合樹脂(A)が、酸基を有するポリウレタン(a1)を含むシェル部と、脂肪族共役ジエンを必須原料とする重合体(a2)を含むコア部とを有するコアシェル型粒子を形成していることを特徴とする水性インクジェットインク用バインダー。
- 前記ポリウレタン(a1)の酸価が10~70mgKOH/gである請求項1記載の水性インクジェットインク用バインダー。
- 前記ポリウレタン(a1)と前記重合体(a2)との質量比(a1/a2)が、95/5~50/50である請求項1又は2記載の水性インクジェットインク用バインダー。
- 請求項1~3いずれか1項記載の水性インクジェットインク用バインダーを含む水性インクジェットインク。
- 請求項4記載の水性インクジェットインクから形成される印刷層。
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| US8939568B2 (en) * | 2010-04-14 | 2015-01-27 | Hewlett-Packard Development Company, L.P. | Ink composition containing polyurethane vinyl hybrid latexes |
| JP4984196B1 (ja) * | 2010-11-30 | 2012-07-25 | Dic株式会社 | インクジェット印刷インク用バインダー、それを含むインクジェット印刷用インク及び印刷物 |
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| JP7201422B2 (ja) * | 2018-12-21 | 2023-01-10 | サカタインクス株式会社 | 活性エネルギー線硬化型フレキソ印刷インキ組成物 |
| JP7190957B2 (ja) * | 2019-04-03 | 2022-12-16 | サカタインクス株式会社 | 活性エネルギー線硬化型フレキソ印刷インキ組成物 |
| JP2021155557A (ja) * | 2020-03-27 | 2021-10-07 | セイコーエプソン株式会社 | インクジェットインク組成物、インクセット、インクジェット記録方法 |
-
2022
- 2022-10-20 JP JP2023556367A patent/JP7517618B2/ja active Active
- 2022-10-20 US US18/699,442 patent/US20240409761A1/en active Pending
- 2022-10-20 EP EP22886841.0A patent/EP4394004A4/en active Pending
- 2022-10-20 CN CN202280063412.2A patent/CN117999323B/zh active Active
- 2022-10-20 WO PCT/JP2022/039034 patent/WO2023074513A1/ja not_active Ceased
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| "Colour Index", THE SOCIETY OF DYERS AND COLOURISTS |
| See also references of EP4394004A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7517618B2 (ja) | 2024-07-17 |
| EP4394004A4 (en) | 2025-01-15 |
| CN117999323A (zh) | 2024-05-07 |
| EP4394004A1 (en) | 2024-07-03 |
| US20240409761A1 (en) | 2024-12-12 |
| CN117999323B (zh) | 2026-01-27 |
| JPWO2023074513A1 (ja) | 2023-05-04 |
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