WO2021235286A1 - オルガノポリシロキサン、およびそれを含有する組成物 - Google Patents
オルガノポリシロキサン、およびそれを含有する組成物 Download PDFInfo
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- WO2021235286A1 WO2021235286A1 PCT/JP2021/018009 JP2021018009W WO2021235286A1 WO 2021235286 A1 WO2021235286 A1 WO 2021235286A1 JP 2021018009 W JP2021018009 W JP 2021018009W WO 2021235286 A1 WO2021235286 A1 WO 2021235286A1
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
- C08G77/18—Polysiloxanes containing silicon bound to oxygen-containing groups to alkoxy or aryloxy groups
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/06—Preparatory processes
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/38—Polysiloxanes modified by chemical after-treatment
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/06—Sulfur
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/56—Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
Definitions
- the present invention relates to an organopolysiloxane and a composition containing the same, and more specifically to an organopolysiloxane having a specific siloxane composition, and a coating composition using the same.
- Silicone resin is currently widely used in various fields because it has excellent properties such as water repellency, heat resistance, weather resistance, cold resistance, electrical insulation, chemical resistance, and safety to the body. ..
- the organopolysiloxane having a three-dimensional crosslinked structure containing 2 units of SiO (Q unit) or 1.5 units of RSiO (T unit) (R is an organic group such as an alkyl group or a phenyl group) is silicone. It is called a resin or silicone alkoxy oligomer, and is widely used for paints, coating agents, binders, etc. due to its curability.
- the liquid silicone alkoxy oligomer having an alkoxysilyl group as a cross-linking group is used as a main agent of a solvent-free paint which is flammable and does not contain an organic solvent harmful to the human body. Further, this alkoxysilyl group undergoes a crosslinking reaction even at room temperature due to the humidity in the air. Therefore, the silicone alkoxy oligomer containing an alkoxysilyl group has excellent heat resistance and weather resistance because the alkoxysilyl group reacts at room temperature or under heating conditions to form a siloxane network by adding a curing catalyst. Since it can easily form a coating, it is used in a wide range of fields from outdoor buildings to electronic parts.
- silicone resins and silicone alkoxy oligomers have the advantages of good curability due to their three-dimensional crosslinked structure and high surface hardness of the cured film, heat is applied over time or from the outside after film formation. At that time, the residual alkoxysilyl group may be condensed to cause cracks in the coating film.
- Patent Document 1 a method of increasing the molecular weight of the organopolysiloxane and reducing the amount of the alkoxysilyl group contained in the molecule has been adopted (Patent Document 1).
- the organopolysilsesqui Oxane becomes solidified or has a high viscosity, and it is essential to dilute it with a solvent when making a coating composition.
- Patent Document 2 a method of incorporating a diorganosiloxane (R 2 SiO 1.0 ) unit (D unit) at the time of synthesizing a silicone resin or a silicone alkoxy oligomer has been adopted (Patent Document 2).
- a method of incorporating a diorganosiloxane (R 2 SiO 1.0 ) unit (D unit) at the time of synthesizing a silicone resin or a silicone alkoxy oligomer has been adopted (Patent Document 2).
- the crosslink density is lowered, there is a problem that the excellent surface hardness, which is an advantage of the organopolysiloxane, is lowered.
- Non-Patent Document 1 a method of adding a silicone oil whose molecular end is sealed with tetraethoxysilane (TEOS) has also been proposed (Non-Patent Document 1), but the compatibility with silicone resin and silicone alkoxy oligomer is poor, and the coating film becomes cloudy. It causes repelling.
- TEOS tetraethoxysilane
- the silicone alkoxy oligomer it is generally indispensable to add a catalyst such as an organometallic compound in order to secure sufficient curability at room temperature, and the addition of an organotin compound is particularly effective.
- organotin compounds usually used as catalysts are concerned about their toxicity to the human body and the environment, and environmental regulations have become stricter in recent years, and their use has been avoided.
- an organometallic catalyst such as an organotin compound is used in a dealcohol type room temperature curable composition, the siloxane bond of the main chain is cleaved (cracked) by the generated alcohol, and the curability deteriorates with time.
- storage stability is poor such as thickening and thickening.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an organopolysiloxane having a low viscosity and a cured film capable of achieving both high hardness and crack resistance, and a composition containing the same. do.
- an organopolysiloxane having a specific composition has a low viscosity and can achieve both high hardness and crack resistance.
- the present invention has been completed by finding that a composition containing an organopolysiloxane is suitable as a curable composition for forming a material such as a coating agent.
- the present invention is an organopolysiloxane represented by the following average unit formula (1) and having a kinematic viscosity of 10 to 350 mm 2 / s at 25 ° C., and silicon atoms of all siloxane units constituting the organopolysiloxane.
- an organopolysiloxane in which the ratio (%) of the number of silicon atoms in the unit represented by the following (1') to the total number is 10% or less.
- R 1 , R 2 , and R 3 are cyclic or acyclic alkyl groups having 1 to 12 carbon atoms, which may contain an unsubstituted or substituted ether bond independently of each other, or unsubstituted or substituted aryl group having a carbon number of 6 ⁇ 12
- R 4 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms
- a, b, c, d, and e The number of 0.2 ⁇ a ⁇ 0, the number of 1 ⁇ b> 0, the number of 0.75 ⁇ c ⁇ 0, the number of 0.2 ⁇ d ⁇ 0, and the number of 1 ⁇ e> 0.
- a + b + c + d 1).
- the organopolysiloxane of the present invention provides a cured film having both high hardness and crack resistance. Further, the curable composition containing the organopolysiloxane of the present invention has a low viscosity and is easy to handle without using a solvent, and can be suitably used as an environment-friendly coating agent containing no solvent.
- the organopolysiloxane according to the present invention is represented by the following average unit formula (1), has an kinematic viscosity of 10 to 350 mm 2 / s at 25 ° C., and is represented by the following structural formula (1').
- the ratio of the constituent units is 10% or less of the number ratio of the silicon atoms of the unit represented by the formula (1') to the total number of silicon atoms of all the siloxane units constituting the organopolysiloxane.
- Siloxane Siloxane.
- R 1 , R 2 , and R 3 are cyclic or acyclic alkyl groups having 1 to 12 carbon atoms, which may contain an unsubstituted or substituted ether bond independently of each other, or unsubstituted or substituted aryl group having a carbon number of 6 ⁇ 12
- R 4 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms
- a, b, c, d, and e The number of 0.2 ⁇ a ⁇ 0, the number of 1 ⁇ b> 0, the number of 0.75 ⁇ c ⁇ 0, the number of 0.2 ⁇ d ⁇ 0, and the number of 1 ⁇ e> 0.
- a + b + c + d 1)
- the present invention improves the crack resistance of the cured film by reducing the proportion of the structural unit represented by the above structural formula (1') contained in the organopolysiloxane.
- the ratio of the structural unit represented by the structural formula (1') is such that the number of moles of silicon atoms of the structural unit represented by the formula (1') is 10 mol, which is the total number of moles of all silicon atoms constituting the organopolysiloxane. % Or less, preferably 8 mol% or less, and particularly preferably 6 mol% or less.
- R 1 , R 2 , and R 3 are preferably unsubstituted or substituted, optionally comprising ether bonds, cyclic or cyclic alkyl groups having 1 to 8 carbon atoms, or unsubstituted or substituted.
- Aryl groups having 6 to 8 carbon atoms are preferable.
- a cyclic or acyclic alkyl group having 1 to 6 carbon atoms, which may contain an ether bond, or an unsubstituted or substituted aryl group having 6 to 8 carbon atoms is more preferable.
- an unsubstituted or substituted alkyl group having 1 to 3 carbon atoms is preferable.
- R 1, R 2, and R 3 is a methyl group, an ethyl group, a propyl group are particularly preferred.
- a halogen atom an alkenyl group such as a vinyl group, a glycidyl type epoxy group, an alicyclic epoxy group, a thiirane group (ethylene sulfide group), a (meth) acryloyloxy group, a mercapto group, an iso (thio) cyanate group.
- Anhydrous succinic acid group amino group, ethylenediamino group, perfluoroalkyl group, polyether group such as polyoxyethylene group, perfluoropolyether group and the like.
- a glycidyl type epoxy group an alicyclic epoxy group, a (meth) acryloyloxy group, a mercapto group, an amino group, a fluoroalkyl group, a vinyl group, and an allyl group are preferable.
- R 4 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, preferably an alkyl group having 1 to 6 carbon atoms, straight-chain, cyclic, may be either branched. Of these, linear alkyl groups are more preferred.
- formula (a) 1 ⁇ b> 0.25, 0.75 ⁇ c ⁇ 0, 1 ⁇ e> 0, preferably 1 ⁇ b> 0.25, 0.75 ⁇ c ⁇ 0, and 0.95 ⁇ e> 0.4, more preferably 1 ⁇ b> 0.5, 0.5 ⁇ c ⁇ 0, and 0.9 ⁇ e> 0.5.
- Satisfy b + c 1.
- R 1 , R 2 , and R 4 are as described above.
- the a, b, c, d and e in the organopolysiloxane of the present invention can be calculated from the peak integration ratios in the 1 H-NMR and 29 Si-NMR spectra.
- the organopolysiloxane of the present invention represented by the above formula (1) preferably has a structure represented by the following formula (2). By using such an organopolysiloxane, even better hardness of the cured film and crack resistance are exhibited.
- R 1 is as described above, n is an integer of 1 to 3, preferably 1 or 2, and more preferably 1.
- the organopolysiloxane of the present invention is characterized by having a specific silicon composition and having a low viscosity.
- the kinematic viscosity of the organopolysiloxane of the present invention is 10 ⁇ 350 mm 2 / s, and more preferably 10 ⁇ 300 mm 2 / s, more preferably 10 ⁇ 250 mm 2 / s, from the viewpoint of workability, 10 ⁇ 200 mm 2 / s is particularly preferable.
- the kinematic viscosity is a value measured at 25 ° C. by an Ostwald viscometer.
- the organopolysiloxane of the present invention is obtained by a method of hydrolyzing and condensing a cyclic siloxane represented by the following structural formula (3) in the presence of an acid catalyst. (Wherein, R 1, R 4 and n are as described above)
- the production method of the present invention is characterized in that a cyclic siloxane represented by the above formula (3) is used as a raw material for a hydrolysis condensation reaction, whereby the amount of the unit represented by the above formula (1') is 10% or less. Can be.
- the organopolysiloxane has a structure represented by the above formula (2), which is derived from the cyclic siloxane represented by the formula (3), so that the hardness of the cured film and crack resistance are further improved. It is preferable because it exhibits the properties.
- the cyclic siloxane represented by the structural formula (3) is preferably the following cyclic alkoxysiloxane.
- the cyclic siloxane represented by the structural formula (3) may be used alone or in combination of two or more. Further, those obtained by partially hydrolyzing and condensing these cyclic siloxanes may be used.
- the acid catalyst is not particularly limited as long as it has sufficient acidity to form a siloxane bond by hydrolyzing an alkoxysilyl group and dehydrating and condensing the generated silanol.
- An acid catalyst having a pKa in the range of -2.9 to 0 is preferable, and a sulfonic acid-based catalyst having a pKa in the range of -2.9 to 0 is particularly preferable.
- an organopolysiloxane having the specific composition described in the present invention is synthesized.
- the acid catalyst may take any form of liquid, solid, and gas, and the form is not particularly limited.
- substituted or unsubstituted alkyl sulfonic acid having 1 to 14 carbon atoms substituted or unsubstituted benzene sulfonic acid having 6 to 30 carbon atoms and its hydrate, substituted or unsubstituted naphthalene sulfonic acid having 6 to 30 carbon atoms.
- Examples thereof include acids and their hydrates, substituted or unsubstituted camphor-sulfonic acids, sulfo group-containing solid acids, nitrates and the like.
- methanesulfonic acid, ethanesulfonic acid, camphorsulfonic acid, p-toluenesulfonic acid, benzenesulfonic acid, dinonylnaphthalenedisulfonic acid (DNNDSA), dinonylnaphthalene (mono) sulfonic acid (DNNSA), dodecylbenzenesulfonic acid ( DDBSA) is preferred, and methanesulfonic acid, paratoluenesulfonic acid, benzenesulfonic acid, dinonylnaphthalenedisulfonic acid (DNNDSA), dinonylnaphthalene (mono) sulfonic acid (DNNSA), and dodecylbenzenesulfonic acid (DDBSA) are particularly preferred.
- the amount of the acid catalyst used is usually preferably 0.001 to 10% by mass, more preferably 0.01 to 5% by mass, and particularly preferably 0.1 to 2.5% by mass, based on the total mass of the polymerization reaction system.
- the method for producing an organopolysiloxane of the present invention comprises one or more selected from the cyclic siloxane represented by the above formula (3) and its hydrolyzed condensate, and the silane represented by the following formula (4) and its water addition.
- One or more selected from the decomposition condensates may be co-hydrolyzed and condensed in the presence of an acid catalyst.
- Methyldiethoxysilane is preferable, and dimethyldimethoxysilane and dimethyldiethoxysilane are more preferable.
- silane represented by the above formula (4) may be used alone or in combination of two or more. Further, those in which these silanes are partially hydrolyzed and condensed may be used.
- the hydrolysis condensation reaction can be carried out without a solvent, and for example, methanol, ethanol, isopropyl alcohol, butanol, diacetone alcohol, propylene glycol monomethyl ether, and propylene glycol monomethyl ether ace.
- Organic solvents such as tart, acetone, toluene, and xylene may be used.
- the amount thereof is not particularly limited, but is preferably 20 parts by mass or less, more preferably 0.25 to 10 parts by mass, and 0.5 to 5 parts with respect to 1 part by mass of the total of silane and siloxane. The mass portion is more preferable.
- Copolymerization by hydrolysis condensation is carried out by adding the acid catalyst and water to a mixture or solution of the cyclic siloxane represented by the above formula (3) and, if necessary, the silane represented by the above formula (4). Will be done.
- an acid catalyst may be used as an aqueous solution in advance.
- the amount of water used in the reaction is usually preferably 0.025 to 5.0 mol, more preferably 0.05 to 2.5 mol, and 0.075 to 0.075 to 1 mol of the alkoxysilyl group contained in the reaction system. 1.0 mol is even more preferred.
- the reaction temperature is not particularly limited, but is usually 0 to 150 ° C, preferably 20 to 120 ° C, more preferably 40 to 100 ° C, and even more preferably 50 to 80 ° C.
- the reaction time is usually 1 hour or more, preferably 2 to 72 hours.
- the temperature and pressure thereof are particularly limited as long as these impurities can be removed. However, it is usually 10 to 150 ° C., preferably 60 to 120 ° C., and can be carried out under atmospheric pressure or reduced pressure.
- Curable Composition The present invention further provides a curable composition containing the above (A) organopolysiloxane and (B) curing catalyst.
- the curable composition containing the organopolysiloxane of the present invention has a low viscosity and is excellent in workability without using a solvent, and therefore can be suitably used as a coating agent. Further, the film obtained by curing the curable composition of the present invention has excellent hardness and crack resistance.
- the curing catalyst is not particularly limited as long as it is used for curing a general moisture condensation curing type composition.
- alkyl tin compounds such as dibutyl tin oxide and dioctyl tin oxide
- alkyl tin ester compounds such as dibutyl tin diacetate, dibutyl tin dilaurate, dioctyl tin dilaurate, dibutyl tin dioctate, dioctyl tin dioctate and dioctyl tin diversatet
- tetraisopropoxytitanium tetraisopropoxytitanium.
- Titanium esters, and titanium chelate compounds and their partial hydrolysates zinc naphthenate, zinc stearate, zinc-2-ethyloctate, iron-2-ethylhexoate, cobalt-2-ethylhexoate, Aluminum compounds such as manganese-2-ethylhexoate, cobalt naphthenate, acetylacetone aluminum, aluminum bis (ethylacetate acetate) mononormal butyrate, aluminum ethylacetate acetate dinormal butyrate, aluminum tris (ethylacetacetate) and them.
- Dialkyl hydroxylamines such as dimethyl hydroxylamine and diethyl hydroxylamine; tetramethylguanidylpropyltrimethoxysilane, tetramethylguanidylpropylmethyldimethoxysilane, tetramethylguanidylpropyltriethoxysilane, tetramethylg Silanes and siloxanes containing guanidyl groups such as anidylpropylmethyldiethoxysilane, tetramethylguanidylpropyltris (trimethylsiloxy) silane; N, N, N', N', N'', N''-hexamethyl -N'''- [3- (trimethoxysilyl) propyl] -silane and siloxane containing phosphazenic bases such as phosphorimidic triamide; hydrochloric acid, methanesulfonic acid, camphors
- tin compounds such as dioctyl tin dilaurate and dioctyl tin diversate, tetraisopropoxytitanium, tetran-butoxytitanium, tetrat-butoxytitanium, titanium diisopropoxybis (ethylacetoacetate), etc.
- titanium compounds and their hydrolyzates titanium compounds such as acetylacetone aluminum, aluminum bis (ethylacetate acetate) mononormal butyrate, aluminum ethylacetate acetate dinormal butyrate, aluminum tris (ethylacetate acetate) and their hydrolyzates.
- Dioctyl Tin Dilaurate Dioctyl Tin Diversate, Tetra n-Butoxytitanium, Tetra t-Butoxytitanium, Acetylacetone Aluminum, Aluminum Bis (Ethylacet Acetate) Mononormal Butyrate, Aluminum Ethylacetate Dinormalal Butyrate, Aluminum Tris (Ethylacet) Acetate), 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, tetramethylguanidylpropyltrimethoxysilane, methanesulfonic acid, camphorsulfonic acid, p-toluenesulfonic acid, benzenesulfonic acid, dinonylnaphthalene Disulfonic acid (DNNDSA), dinonylnaphthalene (mono) sulfonic acid (DNNSA), and dodecylbenzenesulfonic acid (DDBSA) are more preferable
- camphor sulfonic acid camphor sulfonic acid
- tetra n-butoxytitanium tetrat-butoxytitanium
- aluminum bis (ethylacetate acetate) mononormal butyrate aluminum ethylacetate acetate dinormalal butyrate
- aluminum tris ethylacetate acetate
- the amount of the curing catalyst added is not particularly limited.
- the curing rate is adjusted to an appropriate range to prepare a cured film having desired physical properties, and considering the improvement of workability at the time of coating and the economic efficiency associated with the addition, 100 parts by mass of the component (A) is taken into consideration. It is preferably 0.001 to 50 parts by mass, more preferably 0.05 to 40 parts by mass, and even more preferably 0.1 to 30 parts by mass.
- the curable composition of the present invention has, from the viewpoint of use and workability, methanol, ethanol, isopropyl alcohol, butanol, diacetone alcohol, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, acetone, toluene, xylene and the like.
- a form that does not substantially contain an organic solvent that is harmful to the human body and is often flammable is preferable.
- substantially free means that the organic solvent contained in the composition is 1% by mass or less, particularly 0.1% by mass or less.
- the curable composition of the present invention may appropriately contain any additive as long as the effect of the present invention is not impaired.
- additives include adhesive improvers, inorganic and organic UV absorbers, light stabilizers, storage stability improvers, plasticizers, fillers, pigments and the like.
- the coating agent made of the curable composition of the present invention By applying the coating agent made of the curable composition of the present invention to the surface of the base material and curing it, an article having a coating layer made of the cured product can be obtained.
- the coating method is not particularly limited. For example, a known method such as spray coating, spin coating, dip coating, roller coating, brush coating, bar coating, and flow coating can be appropriately selected and used.
- the base material examples include epoxy resins, phenolic resins, polycarbonates and polycarbonate blends, acrylic resins such as poly (methyl methacrylate), polyester resins such as poly (ethylene terephthalate), poly (butylene terephthalate), and unsaturated polyester resins.
- Organic polymer groups such as polyamide resin, polyimide resin, acrylonitrile-styrene copolymer, styrene-acrylonitrile-butadiene copolymer, polyvinyl chloride resin, polystyrene resin, blend of polystyrene and polyphenylene ether, cellulose acetate butyrate, polyethylene resin, etc.
- metal substrates such as steel plates, paint coated surfaces, glass, ceramics, concrete, slate plates, textiles, wood, stones, tiles, (hollow) silica, titania, zirconia, alumina and other inorganic fillers, glass fibers, etc.
- metal substrates such as steel plates, paint coated surfaces, glass, ceramics, concrete, slate plates, textiles, wood, stones, tiles, (hollow) silica, titania, zirconia, alumina and other inorganic fillers, glass fibers, etc.
- examples thereof include glass cloth, glass tape, glass mat, glass paper and other glass fiber products, and the material and shape of the base material are not particularly limited, but the curable composition of the present invention is a steel plate. It can be particularly preferably used for coating glass.
- the hydrolysis / condensation reaction of (A) organopolysiloxane proceeds, and the curing reaction starts.
- Any humidity of 10 to 100% RH may be sufficient as an index of moisture in the atmosphere, and humidity in the air is sufficient.
- the curing reaction temperature and time can be appropriately changed depending on factors such as the substrate used, the water concentration, the catalyst concentration, and the type of hydrolyzable group.
- the curing temperature is preferably ⁇ 10 to 200 ° C., particularly preferably 0 to 150 ° C.
- the curing time is usually about 1 minute to 1 week within a range not exceeding the heat resistant temperature of the substrate to be used. Since the composition of the present invention cures well even at room temperature, the stickiness (tack) on the surface of the coating film disappears in a few minutes to a few hours even when the curing at room temperature is essential for on-site construction, and workability is achieved. Is excellent.
- the heat treatment may be performed within a range not exceeding the heat resistant temperature of the base material.
- the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples.
- the kinematic viscosities of each product are measured values at 25 ° C. by an Ostwald viscometer, and the silicone average composition (constituent unit ratio) is 1 H using a 300 MHz-NMR measuring device manufactured by Nippon Denshi Co., Ltd. -Calculated from the integrated values of the detected spectra in NMR and 29 Si-NMR. Pencil hardness was measured with a weight of 750 g according to JIS K6500-5-4.
- the ratio (%) of the structural unit represented by the formula (1') is the ratio (%) of the number of silicon atoms in the formula (1') to the number of silicon atoms in the total siloxane unit of the organosiloxane. ).
- the obtained organopolysiloxane 1 is a cyclic alkoxysiloxane which is a raw material. It is presumed to have a structural unit represented by the following structural formula (8) from which it is derived. (In the formula (a1), R 1 and R 4 are methyl)
- Example 2 Production of Organopolysiloxane 2
- the same procedure as in Example 1 was carried out except that the amount of ion-exchanged water used was changed to 13.5 g, to obtain organopolysiloxane 2.
- the kinematic viscosity of the obtained organopolysiloxane 2 was 49 mm 2 / s.
- the ratio of the structural unit represented by the formula (1') was 1.0 mol%.
- the obtained organopolysiloxane 2 is a cyclic alkoxysiloxane which is a raw material. It is presumed to have the structural unit represented by the above structural formula (8).
- Example 3 Production of Organopolysiloxane 3
- a 1,000 mL separable flask equipped with a stirrer, a reflux condenser, a dropping funnel and a thermometer is represented by the above formula (3A) obtained in Synthesis Example 1.
- 361 g of cyclic alkoxysiloxane and 361 g of toluene were added, 3.6 g of methanesulfonic acid was added with stirring, and then 9.0 g of ion-exchanged water was added dropwise over 1 hour.
- methanol produced as a by-product at 67 ° C. was distilled off under normal pressure.
- the ratio of the structural unit represented by (1') was 4.4 mol%. Since the ring of the raw material does not remain and the unit of the formula (1') is not generated (the ring is not cleaved), the obtained organopolysiloxane 3 is the cyclic alkoxysiloxane which is the raw material. It is presumed to have the structural unit represented by the above structural formula (8).
- Example 4 Production of Organopolysiloxane 4
- a 1,000 mL separable flask equipped with a stirrer, a reflux condenser, a dropping funnel and a thermometer is represented by the above structural formula (3A) obtained in Synthesis Example 1.
- 324 g of the cyclic alkoxysiloxane, 48 g of dimethyldimethoxysilane, and 372 g of toluene were added, 3.6 g of methanesulfonic acid was added with stirring, and then 12.0 g of ion-exchanged water was added dropwise over 1 hour. After completion of the dropping, the mixture was polymerized at 25 ° C. for 2 hours.
- the ratio of the structural unit represented by the structural formula (1') was 5.3 mol%. Since the ring of the raw material does not remain and the unit of the formula (1') is not generated (the ring is not cleaved), the obtained organopolysiloxane 4 is the cyclic alkoxysiloxane which is the raw material. It is presumed to have the structural unit represented by the above structural formula (8). (In the formula (a2), R 1, R 2 and R 4 are methyl)
- Example 5 Production of Organopolysiloxane 5
- a 1,000 mL separable flask equipped with a stirrer, a reflux condenser, a dropping funnel and a thermometer is represented by the above formula (3A) obtained in Synthesis Example 1.
- 289 g of cyclic alkoxysiloxane, 96 g of dimethyldimethoxysilane, and 385 g of toluene were added, 4.0 g of methanesulfonic acid was added with stirring, and then 13.0 g of ion exchange was added dropwise over 1 hour. After completion of the dropping, the mixture was polymerized at 25 ° C. for 2 hours.
- the ratio of the structural unit represented by the above formula (1') was 2.9 mol%. Since the ring material of the raw material does not remain and the unit of the formula (1') is not generated (the ring body is not cleaved), the obtained organopolysiloxane 5 is a cyclic alkoxysiloxane which is a raw material. It is presumed to have the structural unit represented by the above structural formula (8).
- the ratio of the structural unit represented by the formula (1') was 5.4 mol%. Since the ring of the raw material does not remain and the unit of the formula (1') is not generated (the ring is not cleaved), the obtained organopolysiloxane 6 is the cyclic alkoxysiloxane which is the raw material. It is presumed to have the structural unit represented by the above structural formula (8). (In formula (a3), R 1 is a methyl group or a 3- (methacryloyloxy) propyl group, and R 4 is a methyl group).
- Example 7 Production of Organopolysiloxane 7
- a 1,000 mL separable flask equipped with a stirrer, a reflux condenser, a dropping funnel and a thermometer is represented by the above formula (3A) obtained in Synthesis Example 1.
- 325 g of cyclic alkoxysiloxane, 87 g of 3- (methacryloyloxy) propylmethyldimethoxysilane, and 424 g of toluene were added, 4.2 g of methanesulfonic acid was added with stirring, and then 11.8 g of ion exchange was added dropwise over 1 hour. .. After completion of the dropping, the mixture was polymerized at 25 ° C. for 2 hours.
- the ratio of the structural unit represented by the above formula (1') was 2.3 mol%. Since the ring of the raw material does not remain and the unit of the formula (1') is not generated (the ring is not cleaved), the obtained organopolysiloxane 7 is the cyclic alkoxysiloxane which is the raw material. It is presumed to have the structural unit represented by the above structural formula (8). (In formula (a4), R 1 is a methyl group, R 2 is a methyl group or a 3- (methacryloyloxy) propyl group, and R 4 is a methyl group).
- Example 8 Production of Organopolysiloxane 8 325 g of cyclic alkoxysiloxane represented by the above formula (3A) obtained in Synthesis Example 1 in a 1,000 mL separable flask equipped with a stirrer, a reflux condenser, a dropping funnel and a thermometer. , 3-Glysidyloxypropyltrimethoxysilane 94 g and toluene 419 g were added, 4.2 g of methanesulfonic acid was added with stirring, and then 13.0 g of ion exchange was added dropwise over 1 hour. After completion of the dropping, the mixture was polymerized at 25 ° C. for 2 hours.
- the obtained liquid 21.0 g of Kyoward 500SN (manufactured by Kyowa Chemical Industry Co., Ltd.) was added, and the mixture was stirred at 25 ° C. for 2 hours to neutralize, and then residual methanol and small molecule components were distilled off under reduced pressure to make an organopoly. Siloxane 8 was obtained.
- the kinematic viscosity of the obtained organopolysiloxane 8 was 51 mm 2 / s.
- the ratio of the structural unit represented by the structural formula (1') was 4.9 mol%. Since the ring of the raw material does not remain and the unit of the formula (1') is not generated (the ring is not cleaved), the obtained organopolysiloxane 8 is the cyclic alkoxysiloxane which is the raw material. It is presumed to have the structural unit represented by the above structural formula (8). (In the formula (a5), R 1 is a methyl group or a 3-glycidyloxypropyl group, and R 4 is a methyl group).
- Example 9 Production of Organopolysiloxane 9 325 g of cyclic alkoxysiloxane represented by the above formula (3A) obtained in Synthesis Example 1 in a 1,000 mL separable flask equipped with a stirrer, a reflux condenser, a dropping funnel and a thermometer. , 3-Glysidyloxypropylmethyldimethoxysilane (88 g) and toluene (413 g) were added, 4.1 g of methanesulfonic acid was added with stirring, and then 11.9 g of ion exchange was added dropwise over 1 hour. After completion of the dropping, the mixture was polymerized at 25 ° C. for 2 hours.
- the obtained liquid 20.6 g of Kyoward 500SN (manufactured by Kyowa Chemical Industry Co., Ltd.) was added, and the mixture was stirred at 25 ° C. for 2 hours to neutralize, and then residual methanol and small molecule components were distilled off under reduced pressure to make an organopoly.
- Siloxane 9 was obtained.
- the kinematic viscosity of the obtained organopolysiloxane 9 was 45 mm 2 / s.
- the ratio of the structural unit represented by the structural formula (1') was 4.3 mol%. Since the ring of the raw material does not remain and the unit of the formula (1') is not generated (the ring is not cleaved), the obtained organopolysiloxane 9 is the cyclic alkoxysiloxane which is the raw material. It is presumed to have the structural unit represented by the above structural formula (8). (In formula (a6), R 1 is a methyl group, R 2 is a 3-glycidyloxypropyl group or a methyl group, and R 4 is a methyl group).
- Example 10 Production of Organopolysiloxane 10
- a 1,000 mL separable flask equipped with a stirrer, a reflux condenser, a dropping funnel and a thermometer 325 g of the cyclic alkoxysiloxane represented by the above formula (3A) obtained in Synthesis Example 1 , 3-Mercaptopropyltrimethoxysilane (78 g) and toluene (403 g) were added, 4.0 g of methanesulfonic acid was added with stirring, and then 13.0 g of ion exchange was added dropwise over 1 hour. After completion of the dropping, the mixture was polymerized at 25 ° C. for 2 hours.
- the obtained liquid 20.2 g of Kyoward 500SN (manufactured by Kyowa Chemical Industry Co., Ltd.) was added, and the mixture was stirred at 25 ° C. for 2 hours to neutralize, and then residual methanol and small molecule components were distilled off under reduced pressure to make an organopoly.
- Siloxane 10 was obtained.
- the kinematic viscosity of the obtained organopolysiloxane 10 was 66 mm 2 / s.
- the ratio of the structural unit represented by the formula (1') was 5.3 mol%. Since the ring of the raw material does not remain and the unit of the formula (1') is not generated (the ring is not cleaved), the obtained organopolysiloxane 10 is the cyclic alkoxysiloxane which is the raw material. It is presumed to have the structural unit represented by the above structural formula (8). (In formula (a7), R 1 is a methyl group or a 3-mercaptopropyl group, and R 4 is a methyl group).
- Example 11 Production of Organopolysiloxane 11 Cyclic alkoxysiloxane represented by the above structural formula (3A) obtained in Synthesis Example 1 in a 1,000 mL separable flask equipped with a stirrer, a reflux condenser, a dropping funnel and a thermometer. 325 g, 59 g of vinyltrimethoxysilane, and 384 g of toluene were added, 3.8 g of methanesulfonic acid was added with stirring, and then 13.0 g of ion exchange was added dropwise over 1 hour. After completion of the dropping, the mixture was polymerized at 25 ° C. for 2 hours.
- the ratio of the structural unit represented by the structural formula (1') was 2.9 mol%. Since the ring of the raw material does not remain and the unit of the formula (1') is not generated (the ring is not cleaved), the obtained organopolysiloxane 11 is the cyclic alkoxysiloxane which is the raw material. It is presumed to have the structural unit represented by the above structural formula (8). (In the formula (a8), R 1 is a methyl group or a vinyl group, and R 4 is a methyl group).
- Example 12 Production of Organopolysiloxane 12 Cyclic alkoxysiloxane represented by the above structural formula (3A) obtained in Synthesis Example 1 in a 1,000 mL separable flask equipped with a stirrer, a reflux condenser, a dropping funnel and a thermometer. 325 g, 72 g of 3-aminopropyltrimethoxysilane and 397 g of toluene were added, 4.0 g of methanesulfonic acid was added with stirring, and then 13.0 g of ion exchange was added dropwise over 1 hour. After completion of the dropping, the mixture was polymerized at 25 ° C. for 2 hours.
- the ratio of the structural unit represented by the formula (1') was 5.2 mol%. Since the ring of the raw material does not remain and the unit of the formula (1') is not generated (the ring is not cleaved), the obtained organopolysiloxane 12 is the cyclic alkoxysiloxane which is the raw material. It is presumed to have the structural unit represented by the above structural formula (8). (In formula (a9), R 1 is a methyl group or a 3-aminopropyl group, and R 4 is a methyl group).
- Example 13 Production of Organopolysiloxane 13 Cyclic alkoxysiloxane represented by the above structural formula (3A) obtained in Synthesis Example 1 in a 1,000 mL separable flask equipped with a stirrer, a reflux condenser, a dropping funnel and a thermometer. Add 325 g, (1H, 1H, 2H, 2H-tridecafluorooctyl) trimethoxysilane 187.2 g, and toluene 512 g, add 5.1 g of methanesulfonic acid with stirring, and then add 13.0 g of ion exchange. It was dropped over 1 hour. After completion of the dropping, the mixture was polymerized at 25 ° C.
- the ratio of the structural unit represented by the structural formula (1') was 5.6 mol%. Since the ring of the raw material does not remain and the unit of the formula (1') is not generated (the ring is not cleaved), the obtained organopolysiloxane 13 is the cyclic alkoxysiloxane which is the raw material. It is presumed to have the structural unit represented by the above structural formula (8). (In the formula (a10), R 1 is a methyl group or 1H, 1H, 2H, 2H-tridecafluorooctyl group, and R 4 is a methyl group).
- the ratio of the structural units represented by the structural formula (1') was 42.0 mol%.
- Comparative Example 2 Production of Organopolysiloxane 15
- the same procedure as in Comparative Example 1 was carried out except that the amount of 1N hydrochloric acid used was changed to 21.2 g, to obtain organopolysiloxane 15.
- the kinematic viscosity of the obtained organopolysiloxane 15 was 21 mm 2 / s.
- the ratio of the structural unit represented by the structural formula (1') was 15.3 mol%.
- the organopolysiloxanes obtained in Examples 1 to 13 have the same viscosity as the organopolysiloxanes obtained in Comparative Examples 1 to 3.
- the cured film obtained from the cured composition containing the organopolysiloxane of the example does not crack due to heat aging.
- the cured film obtained from the cured composition containing the organopolysiloxanes of Comparative Examples 1 to 3 is cracked on the entire surface due to heat aging, and the film is peeled off.
- the organopolysiloxane of the present invention has a low viscosity and can provide a cured film having high hardness and excellent heat-resistant crack resistance. Furthermore, it is suitable for applications such as environment-friendly paints that do not use solvents.
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Abstract
Description
特に、SiO2単位(Q単位)やRSiO1.5単位(T単位)(Rは、アルキル基、フェニル基等の有機基)を主成分とする3次元架橋構造を持つオルガノポリシロキサンは、シリコーンレジンやシリコーンアルコキシオリゴマーと呼ばれ、その硬化性を利用して塗料、コーティング剤用途や、バインター用途等に広く使用されている。
また、このアルコキシシリル基は、空気中の湿気により常温でも架橋反応が進む。そのため、アルコキシシリル基を含有するシリコーンアルコキシオリゴマーは、硬化触媒を配合することで、常温あるいは加熱条件下でそのアルコキシシリル基が反応してシロキサンネットワークを形成するため、耐熱性や耐候性に優れた被膜を容易に形成できることから、屋外建造物から電子部品まで、幅広い分野で使用されている。
耐クラック性を改良するために、オルガノポリシロキサンの分子量を増大させ、分子中に含まれるアルコキシシリル基量を少なくする方法が採られている(特許文献1)が、この場合、オルガノポリシルセスキオキサンは固形化、あるいは粘度が高くなり、コーティング組成物とする際に溶剤による希釈が必須となる。また、耐クラック性を改良するために、シリコーンレジンやシリコーンアルコキシオリゴマーの合成時に、ジオルガノシロキサン(R2SiO1.0)単位(D単位)を組み込む方法(特許文献2)が採られているが、この場合、架橋密度が低下するために、オルガノポリシロキサンの長所である優れた表面硬度が低下してしまうという問題点がある。
また、脱アルコールタイプの室温硬化性組成物において有機スズ系化合物等の有機金属系触媒を使用した場合、発生するアルコールによって主鎖のシロキサン結合が切断(クラッキング)され、経時で硬化性が低下したり、増粘したりする等の保存安定性不良を生ずるという問題もある。
本発明に係るオルガノポリシロキサンは、下記平均単位式(1)で表され、25℃における動粘度10~350mm2/sを有するオルガノポリシロキサンであり、下記構造式(1’)で表される構成単位の割合が、該オルガノポリシロキサンを構成する全シロキサン単位のケイ素原子の合計数に対する、該式(1’)で表される単位のケイ素原子の個数割合が10%以下である、オルガノポリシロキサン。
上記式(1)においてa、b、c、dおよびeは、0.2≧a≧0、1≧b>0、0.75≧c≧0、0.2≧d≧0、及び1≧e>0であり、a+b+c+d=1を満たす。硬化膜の硬度及び耐クラック性の観点から、a=0、1≧b>0.25、0.75≧c≧0、d=0、1≧e>0を満たすことが好ましい。更には、a=0、1≧b>0.25、0.75≧c≧0、d=0、及び0.95≧e>0.4を満たすことがより好ましく、a=0、1≧b>0.5、0.5≧c≧0、d=0、及び0.9≧e>0.5を満たすことが特に好ましい。
本発明のオルガノポリシロキサンは、下記構造式(3)で表される環状シロキサンを、酸触媒の存在下で加水分解縮合させる方法により得られる。
本発明の製造方法は、上記式(3)で表される環状シロキサンを原料として加水分解縮合反応させることを特徴とし、これにより、上記式(1’)で示される単位の量を10%以下にすることができる。従来技術であるメチルトリメトキシシラン等を原料とする製造方法では、式(1’)で示される単位の量が多くなり、得られる硬化物は耐クラック性に劣るため好ましくない。また、上述の通り、オルガノポリシロキサンが、式(3)で表される環状シロキサン由来である上記式(2)で表される構造を有することで、さらに良好な硬化膜の硬度、および耐クラック性が発揮されるため好ましい。
本発明はさらに、上記(A)オルガノポリシロキサンと(B)硬化触媒とを含有する硬化性組成物を提供する。本発明のオルガノポリシロキサンを含む硬化性組成物は、粘度が低く、溶媒を用いなくても作業性に優れるため、コーティング剤として好適に使用できる。また、本発明の硬化性組成物を硬化して得られる被膜は、硬度および耐クラック性に優れたものとなる。
なお、これらは1種単独で用いても、2種以上を併用してもよい。
下記において、各生成物の動粘度は、オストワルド粘度計による25℃における測定値であり、シリコーン平均組成(構成単位比)は、日本電子(株)製300MHz-NMR測定装置を用いて、1H-NMRおよび29Si-NMRにおける検出スペクトルの積分値から算出した。鉛筆硬度はJIS K6500-5-4に準じて750g加重にて測定した。
以下において、式(1’)で表される構成単位の割合(%)は、オルガノシロキサンが有する全シロキサン単位のケイ素原子の個数に対する、式(1’)単位のケイ素原子の個数の割合(%)である。
[合成例1]
国際公開第2007/140012号記載の[段落00104]Example26の手順に従って、下記式(3A)で表される、2,4,6,8-テトラメトキシ-2,4,6,8-テトラメチルシクロテトラシロキサンを合成した。
[実施例1]
オルガノポリシロキサン1の製造
撹拌機、還流冷却器、滴下ロートおよび温度計を備えた1,000mLのセパラブルフラスコに、合成例1で得た上記式(3A)で表される環状アルコキシシロキサン361g、及びトルエン361gを入れ、撹拌しながらメタンスルホン酸3.6gを加えた。その後、続けてイオン交換水9.0gを1時間かけて滴下した。滴下終了後、25℃で2時間重合させた。得られた液にキョーワード500SN(協和化学工業(株)製)18.0gを加え、25℃で2時間撹拌して中和した後、残存メタノールと低分子成分を減圧留去し、オルガノポリシロキサン1を得た。
得られたオルガノポリシロキサン1の動粘度は20mm2/sであった。得られたオルガノポリシロキサン1は、下記平均単位式(a1)で表され、各構成単位の比は、Si-NMR測定の結果から算出したところ、b=1、c=0、e=0.72であり、下記式(1’)で表される構成単位の割合は1.5%であった。原料の環状体が残存せず、かつ、式(1’)の単位が生成していない(環状体が開裂していない)ことから、得られたオルガノポリシロキサン1は、原料である環状アルコキシシロキサン由来の下記構造式(8)で表される構成単位を有すると推測される。
オルガノポリシロキサン2の製造
実施例1において、イオン交換水の使用量を13.5gに変更した以外は実施例1と同様の手順を行い、オルガノポリシロキサン2を得た。得られたオルガノポリシロキサン2の動粘度は49mm2/sであった。得られたオルガノポリシロキサン2は、上記平均単位式(a1)で表され、各構成単位の比はSi-NMR測定より、b=1、c=0、及びe=0.64であり、上記式(1’)で表される構成単位の割合は1.0mol%であった。原料の環状体が残存せず、かつ、式(1’)の単位が生成していない(環状体が開裂していない)ことから、得られたオルガノポリシロキサン2は、原料である環状アルコキシシロキサン由来の上記構造式(8)で表される構成単位を有すると推測される。
オルガノポリシロキサン3の製造
撹拌機、還流冷却器、滴下ロートおよび温度計を備えた1,000mLのセパラブルフラスコに、合成例1で得られた上記式(3A)で表される環状アルコキシシロキサン361g、及びトルエン361gを入れ、撹拌しながらメタンスルホン酸3.6gを加えた後、続けてイオン交換水9.0gを1時間かけて滴下した。滴下終了後、67℃で副生するメタノールを常圧留去した。得られた液にキョーワード500SN(協和化学工業(株)製)18.0gを加え、25℃で2時間撹拌して中和した後、残存メタノールと低分子成分を減圧留去し、オルガノポリシロキサン3を得た。
得られたオルガノポリシロキサン3の動粘度は71mm2/sであった。得られたオルガノポリシロキサン3は、上記平均単位式(a1)で表され、各構成単位の比はSi-NMR測定より、b=1、c=0、e=0.62であり、上記式(1’)で表される構成単位の割合は4.4mol%であった。原料の環状体が残存せず、かつ、式(1’)の単位が生成していない(環状体が開裂していない)ことから、得られたオルガノポリシロキサン3は、原料である環状アルコキシシロキサン由来の上記構造式(8)で表される構成単位を有すると推測される。
オルガノポリシロキサン4の製造
撹拌機、還流冷却器、滴下ロートおよび温度計を備えた1,000mLのセパラブルフラスコに、合成例1で得られた上記構造式(3A)で表される環状アルコキシシロキサン324g、ジメチルジメトキシシラン48g、トルエン372gを入れ、撹拌しながらメタンスルホン酸3.6gを加えた後、続けてイオン交換水12.0gを1時間かけて滴下した。滴下終了後、25℃で2時間重合させた。得られた液にキョーワード500SN(協和化学工業(株)製)18.0gを加え、25℃で2時間撹拌して中和した後、残存メタノールと低分子成分を減圧留去し、オルガノポリシロキサン4を得た。
得られたオルガノポリシロキサンの動粘度は40mm2/sであった。得られたオルガノポリシロキサン4は、下記平均単位式(a2)で表され、各構成単位の比はSi-NMR測定より、b=0.91、c=0.09、e=0.72であり、上記構造式(1’)で表される構成単位の割合は5.3mol%であった。原料の環状体が残存せず、かつ、式(1’)の単位が生成していない(環状体が開裂していない)ことから、得られたオルガノポリシロキサン4は、原料である環状アルコキシシロキサン由来の上記構造式(8)で表される構成単位を有すると推測される。
オルガノポリシロキサン5の製造
撹拌機、還流冷却器、滴下ロートおよび温度計を備えた1,000mLのセパラブルフラスコに、合成例1で得られた上記式(3A)で表される環状アルコキシシロキサン289g、ジメチルジメトキシシラン96g、トルエン385gを入れ、撹拌しながらメタンスルホン酸4.0gを加えた後、続けてイオン交換13.0gを1時間かけて滴下した。滴下終了後、25℃で2時間重合させた。得られた液にキョーワード500SN(協和化学工業(株)製)20.0gを加え、25℃で2時間撹拌して中和した後、残存メタノールと低分子成分を減圧留去し、オルガノポリシロキサン5を得た。
得られたオルガノポリシロキサン5の動粘度は31mm2/sであった。得られたオルガノポリシロキサン5は、上記平均単位式(a2)で表され、各構成単位の比はSi-NMR測定より、b=0.84、c=0.16、e=0.81であり、上記式(1’)で表される構成単位の割合は2.9mol%であった。原料の環状体が残存せず、かつ、式(1’)の単位が生成していない(環状体が開裂していない)ことから、得られたオルガノポリシロキサン5は、原料である環状アルコキシシロキサン由来の上記構造式(8)で表される構成単位を有すると推測される。
オルガノポリシロキサン6の製造
撹拌機、還流冷却器、滴下ロートおよび温度計を備えた1,000mLのセパラブルフラスコに、合成例1で得られた上記式(3A)で表される環状アルコキシシロキサン325g、3-(メタクリロイルオキシ)プロピルトリメトキシシラン99g、トルエン424gを入れ、撹拌しながらメタンスルホン酸4.2gを加えた後、続けてイオン交換13.0gを1時間かけて滴下した。滴下終了後、25℃で2時間重合させた。得られた液にキョーワード500SN(協和化学工業(株)製)21.2gを加え、25℃で2時間撹拌して中和した後、残存メタノールと低分子成分を減圧留去し、オルガノポリシロキサン6を得た。
得られたオルガノポリシロキサン6の動粘度は42mm2/sであった。得られたオルガノポリシロキサン6は上記平均単位式(a3)で表され、各構成単位の比はSi-NMR測定より、b=1.0、c=0、e=0.62であり、上記式(1’)で表される構成単位の割合は5.4mol%であった。原料の環状体が残存せず、かつ、式(1’)の単位が生成していない(環状体が開裂していない)ことから、得られたオルガノポリシロキサン6は、原料である環状アルコキシシロキサン由来の上記構造式(8)で表される構成単位を有すると推測される。
オルガノポリシロキサン7の製造
撹拌機、還流冷却器、滴下ロートおよび温度計を備えた1,000mLのセパラブルフラスコに、合成例1で得られた上記式(3A)で表される環状アルコキシシロキサン325g、3-(メタクリロイルオキシ)プロピルメチルジメトキシシラン87g、トルエン424gを入れ、撹拌しながらメタンスルホン酸4.2gを加えた後、続けてイオン交換11.8gを1時間かけて滴下した。滴下終了後、25℃で2時間重合させた。得られた液にキョーワード500SN(協和化学工業(株)製)20.6gを加え、25℃で2時間撹拌して中和した後、残存メタノールと低分子成分を減圧留去し、オルガノポリシロキサン7を得た。
得られたオルガノポリシロキサン7の動粘度は41mm2/sであった。得られたオルガノポリシロキサン7は下記平均単位式(a4)で表され、各構成単位の比はSi-NMR測定より、b=0.91、c=0.09、e=0.69であり、上記式(1’)で表される構成単位の割合は2.3mol%であった。原料の環状体が残存せず、かつ、式(1’)の単位が生成していない(環状体が開裂していない)ことから、得られたオルガノポリシロキサン7は、原料である環状アルコキシシロキサン由来の上記構造式(8)で表される構成単位を有すると推測される。
オルガノポリシロキサン8の製造
撹拌機、還流冷却器、滴下ロートおよび温度計を備えた1,000mLのセパラブルフラスコに、合成例1で得られた上記式(3A)で表される環状アルコキシシロキサン325g、3-グリシジルオキシプロピルトリメトキシシラン94g、トルエン419gを入れ、撹拌しながらメタンスルホン酸4.2gを加えた後、続けてイオン交換13.0gを1時間かけて滴下した。滴下終了後、25℃で2時間重合させた。得られた液にキョーワード500SN(協和化学工業(株)製)21.0gを加え、25℃で2時間撹拌して中和した後、残存メタノールと低分子成分を減圧留去し、オルガノポリシロキサン8を得た。
得られたオルガノポリシロキサン8の動粘度は51mm2/sであった。得られたオルガノポリシロキサン8は下記平均単位式(a5)で表され、各構成単位の比はSi-NMR測定より、b=1.0、c=0、e=0.65であり、上記構造式(1’)で表される構成単位の割合は4.9mol%であった。原料の環状体が残存せず、かつ、式(1’)の単位が生成していない(環状体が開裂していない)ことから、得られたオルガノポリシロキサン8は、原料である環状アルコキシシロキサン由来の上記構造式(8)で表される構成単位を有すると推測される。
オルガノポリシロキサン9の製造
撹拌機、還流冷却器、滴下ロートおよび温度計を備えた1,000mLのセパラブルフラスコに、合成例1で得られた上記式(3A)で表される環状アルコキシシロキサン325g、3-グリシジルオキシプロピルメチルジメトキシシラン88g、トルエン413gを入れ、撹拌しながらメタンスルホン酸4.1gを加えた後、続けてイオン交換11.9gを1時間かけて滴下した。滴下終了後、25℃で2時間重合させた。得られた液にキョーワード500SN(協和化学工業(株)製)20.6gを加え、25℃で2時間撹拌して中和した後、残存メタノールと低分子成分を減圧留去し、オルガノポリシロキサン9を得た。
得られたオルガノポリシロキサン9の動粘度は45mm2/sであった。得られたオルガノポリシロキサン9は下記平均単位式(a6)で表され、各構成単位の比はSi-NMR測定より、b=0.9、c=0.1、e=0.67であり、上記構造式(1’)で表される構成単位の割合は4.3mol%であった。原料の環状体が残存せず、かつ、式(1’)の単位が生成していない(環状体が開裂していない)ことから、得られたオルガノポリシロキサン9は、原料である環状アルコキシシロキサン由来の上記構造式(8)で表される構成単位を有すると推測される。
オルガノポリシロキサン10の製造
撹拌機、還流冷却器、滴下ロートおよび温度計を備えた1,000mLのセパラブルフラスコに、合成例1で得られた上記式(3A)で表される環状アルコキシシロキサン325g、3-メルカプトプロピルトリメトキシシラン78g、トルエン403gを入れ、撹拌しながらメタンスルホン酸4.0gを加えた後、続けてイオン交換13.0gを1時間かけて滴下した。滴下終了後、25℃で2時間重合させた。得られた液にキョーワード500SN(協和化学工業(株)製)20.2gを加え、25℃で2時間撹拌して中和した後、残存メタノールと低分子成分を減圧留去し、オルガノポリシロキサン10を得た。
得られたオルガノポリシロキサン10の動粘度は66mm2/sであった。得られたオルガノポリシロキサン10は下記平均単位式(a7)で表され、各構成単位の比はSi-NMR測定より、b=1.0、c=0、e=0.63であり、上記式(1’)で表される構成単位の割合は5.3mol%であった。原料の環状体が残存せず、かつ、式(1’)の単位が生成していない(環状体が開裂していない)ことから、得られたオルガノポリシロキサン10は、原料である環状アルコキシシロキサン由来の上記構造式(8)で表される構成単位を有すると推測される。
オルガノポリシロキサン11の製造
撹拌機、還流冷却器、滴下ロートおよび温度計を備えた1,000mLのセパラブルフラスコに、合成例1で得られた上記構造式(3A)で表される環状アルコキシシロキサン325g、ビニルトリメトキシシラン59g、トルエン384gを入れ、撹拌しながらメタンスルホン酸3.8gを加えた後、続けてイオン交換13.0gを1時間かけて滴下した。滴下終了後、25℃で2時間重合させた。得られた液にキョーワード500SN(協和化学工業(株)製)19.2gを加え、25℃で2時間撹拌して中和した後、残存メタノールと低分子成分を減圧留去し、オルガノポリシロキサン11を得た。
得られたオルガノポリシロキサン11の動粘度は38mm2/sであった。得られたオルガノポリシロキサン11は下記平均単位式(a8)で表され、各構成単位の比はSi-NMR測定より、b=1.0、c=0、e=0.57であり、上記構造式(1’)で表される構成単位の割合は2.9mol%であった。原料の環状体が残存せず、かつ、式(1’)の単位が生成していない(環状体が開裂していない)ことから、得られたオルガノポリシロキサン11は、原料である環状アルコキシシロキサン由来の上記構造式(8)で表される構成単位を有すると推測される。
オルガノポリシロキサン12の製造
撹拌機、還流冷却器、滴下ロートおよび温度計を備えた1,000mLのセパラブルフラスコに、合成例1で得られた上記構造式(3A)で表される環状アルコキシシロキサン325g、3-アミノプロピルトリメトキシシラン72g、トルエン397gを入れ、撹拌しながらメタンスルホン酸4.0gを加えた後、続けてイオン交換13.0gを1時間かけて滴下した。滴下終了後、25℃で2時間重合させた。得られた液にキョーワード500SN(協和化学工業(株)製)19.8gを加え、25℃で2時間撹拌して中和した後、残存メタノールと低分子成分を減圧留去し、オルガノポリシロキサン12を得た。
得られたオルガノポリシロキサン12の動粘度は61mm2/sであった。得られたオルガノポリシロキサン11は上記平均単位式(a1)で表され、各構成単位の比はSi-NMR測定より、b=1.0、c=0、e=0.59であり、上記式(1’)で表される構成単位の割合は5.2mol%であった。原料の環状体が残存せず、かつ、式(1’)の単位が生成していない(環状体が開裂していない)ことから、得られたオルガノポリシロキサン12は、原料である環状アルコキシシロキサン由来の上記構造式(8)で表される構成単位を有すると推測される。
オルガノポリシロキサン13の製造
撹拌機、還流冷却器、滴下ロートおよび温度計を備えた1,000mLのセパラブルフラスコに、合成例1で得られた上記構造式(3A)で表される環状アルコキシシロキサン325g、(1H,1H,2H,2H-トリデカフルオロオクチル)トリメトキシシラン187.2g、トルエン512gを入れ、撹拌しながらメタンスルホン酸5.1gを加えた後、続けてイオン交換13.0gを1時間かけて滴下した。滴下終了後、25℃で2時間重合させた。得られた液にキョーワード500SN(協和化学工業(株)製)25.6gを加え、25℃で2時間撹拌して中和した後、残存メタノールと低分子成分を減圧留去し、オルガノポリシロキサン13を得た。
得られたオルガノポリシロキサン13の動粘度は81mm2/sであった。得られたオルガノポリシロキサン13は下記平均単位式(a10)で表され、各構成単位の比はSi-NMR測定より、b=1.0、c=0、e=0.60であり、上記構造式(1’)で表される構成単位の割合は5.6mol%であった。原料の環状体が残存せず、かつ、式(1’)の単位が生成していない(環状体が開裂していない)ことから、得られたオルガノポリシロキサン13は、原料である環状アルコキシシロキサン由来の上記構造式(8)で表される構成単位を有すると推測される。
オルガノポリシロキサン14の製造
撹拌機、還流冷却器、滴下ロートおよび温度計を備えた300mLのセパラブルフラスコに、メチルトリメトキシシラン150gを入れ、撹拌しながら、25℃で0.1N塩酸16.7gを滴下し、60℃で2時間加水分解縮合した。これを120℃まで加熱して副生メタノールを常圧留去した後、濾過し、オルガノポリシロキサン14を得た。
得られたオルガノポリシロキサン14の動粘度は4mm2/sであった。得られたオルガノポリシロキサン14は上記平均単位式(a1)で表され、各構成単位の比はSi-NMR測定より、b=1、c=0、e=1.32であった。上記構造式(1’)で表される構成単位の割合は42.0mol%であった。
オルガノポリシロキサン15の製造
比較例1において、1N塩酸の使用量を21.2gに変更した以外は比較例1と同様の手順を行い、オルガノポリシロキサン15を得た。
得られたオルガノポリシロキサン15の動粘度は21mm2/sであった。得られたオルガノポリシロキサン15は上記平均単位式(a1)で表され、各構成単位の比はSi-NMR測定より、b=1、c=0、e=0.86であった。上記構造式(1’)で表される構成単位の割合は15.3mol%であった。
オルガノポリシロキサン16の製造
比較例1において、1N塩酸の使用量を22.6gに変更した以外は比較例1と同様の手順を行い、オルガノポリシロキサン16を得た。
得られたオルガノポリシロキサン16の動粘度は80mm2/sであった。得られたオルガノポリシロキサン16は上記平均単位式(a1)で表され、各構成単位の比はSi-NMR測定より、b=1、c=0、e=0.72であった。上記構造式(1’)で表される構成単位の割合は12.2mol%であった。
[実施例1~13および比較例1~3]
上記実施例1~13及び比較例1~3の各々で得られたオルガノポリシロキサン100質量部と、硬化触媒であるジ-n-ブトキシ(エチルアセトアセテート)アルミニウム5質量部とを撹拌機を用いて均一に混合し、コーティング剤を調製した。得られたコーティング剤を、25℃、50%RHの空気下でバーコーターNo.5を用いてガラス板に塗布し、105℃の空気下で2時間加熱硬化させた。
膜の外観を目視で観察し、クラックが見られないものを〇、基材周辺部にクラックが見られるものを△、全面にクラックが見られるものを×とし、〇を合格、△と×を不合格とした。また、各段階における被膜の鉛筆硬度を、JIS K 5600-5-4記載の鉛筆引掻き試験に準じた方法で750gの荷重をかけて測定した。結果を表1および表2に示した。
また、得られた硬化被膜を150℃の空気下で1時間エージングさせた後、上記と同じく、膜の外観を目視で観察し評価した。また、エージング後の硬化被膜の鉛筆硬度を、上記と同じ方法にて測定した。結果を表1および表2に示した。
Claims (12)
- 下記平均単位式(1)で表され、25℃における動粘度10~350mm2/sを有するオルガノポリシロキサンであり、該オルガノポリシロキサンを構成する全シロキサン単位のケイ素原子の合計数に対する、下記(1’)で表される単位のケイ素原子の個数の割合(%)が10%以下である、オルガノポリシロキサン
(式中、R1、R2、およびR3は、互いに独立に、非置換もしくは置換の、エーテル結合を含んでいても良い、環状または非環状の炭素原子数1~12のアルキル基、または非置換もしくは置換の炭素原子数6~12のアリール基であり、R4は水素原子、または炭素原子数1~10のアルキル基であり、かつ、a、b、c、d、及びeは、0.2≧a≧0の数、1≧b>0の数、0.75≧c≧0の数、0.2≧d≧0の数、及び1≧e>0の数であり、但し、a+b+c+d=1である)。 - 前記式(1)で表されるオルガノポリシロキサンを構成する全シロキサン単位のケイ素原子の合計数に対する、上記式(1’)で表される単位のケイ素原子の個数の割合が6%以下である、請求項1記載のオルガノポリシロキサン。
- 上記式(1)において、a=0、及びd=0である、請求項1~3のいずれか1項記載のオルガノポリシロキサン。
- 下記平均単位式(1)で表され、25℃における動粘度10~350mm2/sを有するオルガノポリシロキサンであり、該オルガノポリシロキサンを構成する全シロキサン単位のケイ素原子の合計数に対する、下記式(1’)で表される単位のケイ素原子の個数の割合(%)が10%以下である、オルガノポリシロキサンの製造方法において、
(式中、R1、R2、およびR3は、互いに独立に、非置換もしくは置換の、エーテル結合を含んでいても良い、環状または非環状の炭素原子数1~12のアルキル基、または非置換もしくは置換の炭素原子数6~12のアリール基であり、R4は水素原子、または炭素原子数1~10のアルキル基であり、かつ、a、b、c、d、及びeは、0.2≧a≧0の数、1≧b>0の数、0.75≧c≧0の数、0.2≧d≧0の数、及び1≧e>0の数であり、但し、a+b+c+d=1である)
下記一般式(3)で表される環状シロキサンを
(式中、R1、R4及びnは上述の通りである)
酸触媒の存在下で加水分解縮合させて上記式(1)で表されるオルガノポリシロキサンを得る工程を含む、前記オルガノポリシロキサンの製造方法。 - 上記式(4)においてmが2又は3であり、上記式(1)においてa=0及びd=0であるオルガノポリシロキサンを得る工程を含む、請求項6記載の製造方法。
- (A)請求項1~4のいずれか1項記載のオルガノポリシロキサンおよび(B)硬化触媒を含有する硬化性組成物。
- 前記(B)硬化触媒が、アルミニウム化合物、チタン化合物、ブレンステッド酸、及びアミン化合物から選択される1種以上である、請求項8記載の硬化性組成物。
- 請求項8または9記載の硬化性組成物が硬化してなる硬化物。
- 請求項8または9記載の硬化性組成物からなるコーティング剤。
- 請求項10記載の硬化物からなる被覆層を有する物品。
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