WO2021039555A1 - 室温硬化性樹脂組成物、コーティング剤、接着剤及びシーリング剤、並びに物品 - Google Patents
室温硬化性樹脂組成物、コーティング剤、接着剤及びシーリング剤、並びに物品 Download PDFInfo
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- WO2021039555A1 WO2021039555A1 PCT/JP2020/031363 JP2020031363W WO2021039555A1 WO 2021039555 A1 WO2021039555 A1 WO 2021039555A1 JP 2020031363 W JP2020031363 W JP 2020031363W WO 2021039555 A1 WO2021039555 A1 WO 2021039555A1
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- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
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- MABAWBWRUSBLKQ-UHFFFAOYSA-N ethenyl-tri(propan-2-yloxy)silane Chemical compound CC(C)O[Si](OC(C)C)(OC(C)C)C=C MABAWBWRUSBLKQ-UHFFFAOYSA-N 0.000 description 1
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 description 1
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- 125000006610 n-decyloxy group Chemical group 0.000 description 1
- 125000001298 n-hexoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
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- NCCHARWOCKOHIH-UHFFFAOYSA-N n-methylbenzamide Chemical group CNC(=O)C1=CC=CC=C1 NCCHARWOCKOHIH-UHFFFAOYSA-N 0.000 description 1
- 125000003935 n-pentoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000003506 n-propoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 1
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 description 1
- 125000001181 organosilyl group Chemical group [SiH3]* 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical class [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- NAYYNDKKHOIIOD-UHFFFAOYSA-N phthalamide Chemical compound NC(=O)C1=CC=CC=C1C(N)=O NAYYNDKKHOIIOD-UHFFFAOYSA-N 0.000 description 1
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- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
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- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 235000011056 potassium acetate Nutrition 0.000 description 1
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical compound CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 description 1
- 229940080818 propionamide Drugs 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
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- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000012508 resin bead Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical class [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical group [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 1
- WSFQLUVWDKCYSW-UHFFFAOYSA-M sodium;2-hydroxy-3-morpholin-4-ylpropane-1-sulfonate Chemical compound [Na+].[O-]S(=O)(=O)CC(O)CN1CCOCC1 WSFQLUVWDKCYSW-UHFFFAOYSA-M 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 125000003107 substituted aryl group Chemical group 0.000 description 1
- TXDNPSYEJHXKMK-UHFFFAOYSA-N sulfanylsilane Chemical class S[SiH3] TXDNPSYEJHXKMK-UHFFFAOYSA-N 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- WYXIGTJNYDDFFH-UHFFFAOYSA-Q triazanium;borate Chemical compound [NH4+].[NH4+].[NH4+].[O-]B([O-])[O-] WYXIGTJNYDDFFH-UHFFFAOYSA-Q 0.000 description 1
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 1
- WEAPVABOECTMGR-UHFFFAOYSA-N triethyl 2-acetyloxypropane-1,2,3-tricarboxylate Chemical compound CCOC(=O)CC(C(=O)OCC)(OC(C)=O)CC(=O)OCC WEAPVABOECTMGR-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- IXSPLXSQNNZJJU-UHFFFAOYSA-N trimethyl(silyloxy)silane Chemical compound C[Si](C)(C)O[SiH3] IXSPLXSQNNZJJU-UHFFFAOYSA-N 0.000 description 1
- OLTVTFUBQOLTND-UHFFFAOYSA-N tris(2-methoxyethoxy)-methylsilane Chemical compound COCCO[Si](C)(OCCOC)OCCOC OLTVTFUBQOLTND-UHFFFAOYSA-N 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
- 239000011667 zinc carbonate Substances 0.000 description 1
- 229910000010 zinc carbonate Inorganic materials 0.000 description 1
- 235000004416 zinc carbonate Nutrition 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Classifications
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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
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- 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
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
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- C08G65/329—Polymers modified by chemical after-treatment with organic compounds
- C08G65/336—Polymers modified by chemical after-treatment with organic compounds containing silicon
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K3/36—Silica
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5435—Silicon-containing compounds containing oxygen containing oxygen in a ring
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L101/10—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing hydrolysable silane groups
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
- C08L71/02—Polyalkylene oxides
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- 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
- C08L83/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
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- 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
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- C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
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- C09J201/00—Adhesives based on unspecified macromolecular compounds
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1006—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
- C09K3/1018—Macromolecular compounds having one or more carbon-to-silicon linkages
Definitions
- a silicon group (hereinafter, also referred to as "reactive silicon group”) that can be crosslinked by forming a siloxane bond (Si—O—Si bond) at room temperature due to moisture (moisture) in the atmosphere is a molecule. It relates to a room temperature curable resin composition containing an organic polymer (base polymer) having both ends of the chain, and in particular, has an organosiloxane structure, a hydrolyzable silyl group and a hindered amine skeleton in the molecule with the above organic polymer.
- the room temperature curable resin composition containing an organic silicon compound further, it is coated and adhered with a coating agent, an adhesive and a sealing agent composed of the room temperature curable resin composition, and a cured product of the room temperature curable resin composition. , And articles with at least one of the seals.
- Organic polymers having reactive silicon groups such as hydrolyzable silyl groups typified by alkoxysilyl groups and silanol groups (Si—OH groups) are hydrolyzed and condensed in the presence of water (condensation in the case of silanol groups). To do.
- the organic polymer having this reactive silicon group at the terminal of the molecular chain is crosslinked and cured in the presence of moisture, and can be used as a curable resin composition.
- those whose main chain structure is a silicon-containing compound are generally silicone polymers (organopolysiloxane) and their main chains.
- those having a polyoxyalkylene structure are generally known as modified silicone polymers and silylated urethane polymers, and those having a main chain structure of polyacrylate are generally known as silylated acrylate polymers and the like.
- the curable resin composition using these has a characteristic that it is liquid at room temperature (23 ° C. ⁇ 15 ° C.) and becomes a rubber elastic body by curing, and by utilizing this characteristic, a coating agent, an adhesive, etc. It is widely used as a sealant for building sealants.
- the curable resin composition has a problem that it deteriorates with time due to the action of light such as ultraviolet rays.
- Such deterioration over time appears as deterioration of the physical properties and appearance of the resin, for example, deterioration of appearance such as deterioration of rubber elasticity and cracking or whitening of the cured product.
- UV absorbers such as benzotriazole and benzophenone
- stabilizers such as nickel complexes
- antioxidants of hindered phenols especially 2,6-bis (tert-butyl) -hydroxytoluene, etc.
- a hindered amine-based light stabilizer which is known to have an excellent effect of photostabilizing, particularly imparting weather resistance, is generally blended.
- This hindered amine-based light stabilizer is a resin modifier that can suppress deterioration over time due to the action of light such as ultraviolet rays on resins, especially organic resins, and impart weather resistance and light resistance to organic resins.
- Various compounds containing mainly 2,2,6,6-tetramethylpiperidinyl group and 1,2,2,6,6-pentamethylpiperidinyl group have been proposed and conventionally used. It has been considered.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-336118 discloses a method of directly binding a hindered amine-based light stabilizer to a resin material or a polymer compound
- Patent Document 2 Japanese Patent Laid-Open No. 2005 discloses a method of binding a plurality of hindered amine-based light stabilizers into one molecule to increase the molecular weight.
- the weather resistance of these hindered amine-based light stabilizers is not yet sufficient, and further improvement is desired.
- Patent Document 3 Patent No. 2961541
- a hindered amine light stabilizer in which a hydrolyzable silyl group is introduced into the hindered amine light stabilizer and a hinder A silicone polymer containing a doamino group is disclosed. Since the hydrolyzable silyl group-introduced hindered amine-based light stabilizer of Patent Document 3 reacts with the resin and integrates with the resin, the bleed-bloom phenomenon of the light stabilizer can be suppressed as compared with the existing hindered amine-based light stabilizer. Since the compatibility with the resin material is too high, it is difficult to suppress ultraviolet deterioration on the surface of the resin material.
- the present invention has been made in view of the above circumstances, and provides a room temperature curable resin composition, a coating agent, an adhesive and a sealing agent, and an article, which provide a cured product capable of suppressing deterioration over time due to the action of light such as ultraviolet rays.
- the purpose is.
- a room-temperature curable resin composition containing a specific organic silicon compound having a hydrolyzable silyl group and a hindered amine skeleton as a light stabilizer suppresses deterioration over time due to the action of light such as ultraviolet rays, and exhibits good weather resistance.
- the present invention has been completed by finding that it is suitable as a room temperature curable resin composition having high weather resistance in order to give a cured product to be obtained.
- the present invention provides the following room temperature curable resin compositions, coating agents, adhesives and sealing agents, articles and the like.
- 1. A room temperature curable resin composition containing an organopolymer having both ends of the molecular chain sealed with silanol groups and / or hydrolyzable silyl groups as the main component and containing an organosilicon compound represented by the following average structural formula (1). .. (In the formula, Z represents a 2- to 20-valent group containing an organosiloxane structure, and R 1 is an unsubstituted or substituted alkyl group having 1 to 10 carbon atoms, or an unsubstituted or substituted group, respectively.
- R 2 is independently an alkyl group having 1 to 10 unsubstituted or substituted carbon atoms, or an unsubstituted or substituted alkyl group having 6 to 10 carbon atoms.
- R 3 independently represents a hydrogen atom, an unsubstituted or substituted alkyl group having 1 to 20 carbon atoms, an unsubstituted or substituted alkoxy group having 1 to 20 carbon atoms, or O.D.
- R 4 independently represents a hydrogen atom or an unsubstituted or substituted alkyl group having 1 to 10 carbon atoms
- a 1 independently represents a single bond or a hetero. It represents an atom-free, unsubstituted or substituted alkylene group having 1 to 20 carbon atoms
- a 2 represents a divalent linking group containing a single bond or a hetero atom, respectively
- a 3 Each independently represents a heteroatom-free, unsubstituted or substituted alkylene group having 2 to 20 carbon atoms, m is a number of 1 to 3, and p is a number of 1 to 10.
- R 1 , R 2 , R 3 , R 4 , A 1 , A 2 , A 3 and m have the same meanings as described above, and R 5 and R 6 are independently unsubstituted or substituted, respectively. It represents an alkyl group having 1 to 20 carbon atoms or an aryl group having 6 to 10 carbon atoms, and n represents a number of 1 or more.
- the organosilicon compound represented by the average structural formula (2) is an organosilicon compound represented by the following structural formulas (3) and / or (4).
- R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , A 1 , A 2 , A 3 and m have the same meanings as described above.
- R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , A 2 , A 3 , m and n have the same meanings as described above.
- (G) Plasticizer The room temperature curable resin composition according to any one of 2 to 4, which contains one or more components selected from 1 to 1,000 parts by mass. 6.
- a coating agent comprising the room temperature curable resin composition according to any one of 1 to 5.
- An adhesive comprising the room temperature curable resin composition according to any one of 1 to 5.
- a sealing agent comprising the room temperature curable resin composition according to any one of 1 to 5.
- the room temperature curable resin composition of the present invention contains an organosiloxane modified hindered amine-based photostabilizer having a specific molecular structure having an organosiloxane structure, a highly reactive hydrolyzable silyl group, and a hindered amine skeleton in the molecule. As a result, it has the characteristics of being excellent in weather resistance and crack resistance as compared with the conventional room temperature curable resin composition to which a hindered amine-based light stabilizer is added.
- the room temperature curable resin composition of the present invention having such properties can be suitably used for applications such as coating agents, adhesives, and sealing agents.
- the room temperature curable resin composition of the present invention contains an organic polymer having both ends of the molecular chain sealed with silanol groups and / or hydrolyzable silyl groups as a main component, and is an organic represented by the following average structural formula (1). It contains a silicon compound.
- Z represents a 2- to 20-valent group containing an organosiloxane structure
- R 1 is an unsubstituted or substituted alkyl group having 1 to 10 carbon atoms, or an unsubstituted or substituted group, respectively.
- R 2 is independently an alkyl group having 1 to 10 unsubstituted or substituted carbon atoms, or an unsubstituted or substituted alkyl group having 6 to 10 carbon atoms.
- R 3 independently represents a hydrogen atom, an unsubstituted or substituted alkyl group having 1 to 20 carbon atoms, an unsubstituted or substituted alkoxy group having 1 to 20 carbon atoms, or O.D.
- R 4 independently represents a hydrogen atom or an unsubstituted or substituted alkyl group having 1 to 10 carbon atoms
- a 1 independently represents a single bond or a hetero. It represents an atom-free, unsubstituted or substituted alkylene group having 1 to 20 carbon atoms
- a 2 represents a divalent linking group containing a single bond or a hetero atom, respectively
- a 3 Each independently represents a heteroatom-free, unsubstituted or substituted alkylene group having 2 to 20 carbon atoms
- m is a number of 1 to 3
- p is a number of 1 to 10.
- q is a number from 1 to 10, and p + q satisfies 2 to 20 corresponding to the valence of Z.
- the room temperature curable resin composition of the present invention preferably contains the following components (A) to (D).
- the component (A) used in the present invention is an organic polymer in which both ends of the molecular chain are sealed with a silanol group (hydroxyl group bonded to a silicon atom) and / or a hydrolyzable silyl group, and the room temperature curable resin of the present invention. It acts as a main agent (base polymer) in the composition.
- a base polymer a modified silicone polymer, a silylated urethane polymer, a silylated acrylate polymer, or a silicone polymer is preferable.
- modified silicone polymer examples include polypropylene oxides, polyethylene oxides, propylene oxide-ethylene oxide copolymers, etc., in which both ends of the molecular chain are sealed with silanol groups and / or hydrolyzable silyl groups (for example, alkoxysilyl groups).
- silanol groups and / or hydrolyzable silyl groups for example, alkoxysilyl groups.
- a polyether-modified silicone polymer in which both ends of the molecular chain of the above are sealed with silanol groups and / or hydrolyzable silyl groups is used.
- the main chain is polypropylene oxide in which both ends of the molecular chain are closed with a hydrolyzable silyl group, and the number average molecular weight is 5,000 to 50,000, preferably 10,000 to 40,000.
- modified silicone polymer such as the polyether modified silicone polymer
- examples of the modified silicone polymer include Kaneka MS Polymer Series (S203, S203H, S303, S303H) manufactured by Kaneka Corporation and Exester Series (ES-S2410) manufactured by AGC Corporation. , ES-S2420, ES-S3430, ES-S3630) and the like.
- the molecular weight (or degree of polymerization) is, for example, a number average molecular weight (or number average degree of polymerization) in terms of polystyrene in gel permeation chromatography (GPC) analysis using tetrahydrofuran (THF), toluene or the like as a developing solvent.
- GPC gel permeation chromatography
- THF tetrahydrofuran
- THF tetrahydrofuran
- toluene toluene or the like as a developing solvent.
- it can be determined as a weight average molecular weight (or weight average degree of polymerization) or the like (hereinafter, the same applies).
- the silylated urethane polymer has a main chain composed of polypropylene oxide, polyethylene oxide, a propylene oxide-ethylene oxide copolymer, or the like, and has a urethane bond reaction structure with isocyanate as a part of the main chain structure. Moreover, it is a polymer having a structure in which both ends of the molecular chain are sealed with a silanol group and / or a hydrolyzable silyl group.
- both ends of the molecular chain such as polyacrylate and polymethacrylate in which both ends of the molecular chain are sealed with a silanol group and / or a hydrolyzable silyl group are silanol groups and / or hydrolyzable.
- a silylated acrylate polymer sealed with a silyl group is used.
- a polyacrylate copolymer having a polyacrylate having both ends of the molecular chain sealed with a hydrolyzable silyl group as the main chain is preferable because of its easy availability.
- Examples of such a silylated acrylate polymer include Kaneka XMAP or Kaneka TA polymer manufactured by Kaneka Corporation.
- silicone polymer specifically, a diorganopolysiloxane in which both ends of the molecular chain represented by the following general formula (I) or (II) are sealed with a silanol group and / or a hydrolyzable silyl group is used. Be done.
- R is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 12 carbon atoms, preferably 1 to 8, and X is an oxygen atom or 1 to 8 carbon atoms, preferably 1 to 6. It is a divalent hydrocarbon group (for example, an alkylene group), Y is a hydrolyzable group, a is 2 or 3, and m is the viscosity of this diorganopolysiloxane at 23 ° C. of 100 to 1,000. This is a number of 000 mPa ⁇ s.)
- the unsubstituted or substituted monovalent hydrocarbon group of R includes a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a tert-butyl group and a pentyl.
- Alkyl group such as group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, octadecyl group, cycloalkyl group such as cyclopentyl group and cyclohexyl group, vinyl group, allyl group, butenyl group, pentenyl group, hexenyl group and the like.
- the groups and the like can be exemplified. Among these, a methyl group, an ethyl group and a phenyl group are preferable, and a methyl group is particularly preferable.
- X is a divalent hydrocarbon group having an oxygen atom or a carbon atom number of 1 to 8, and the divalent hydrocarbon group is represented by ⁇ (CH 2 ) q ⁇ (q represents an integer of 1 to 8).
- the alkylene group is preferable. Among these, an oxygen atom, ⁇ CH 2 CH 2 ⁇ , is preferable.
- Y is a hydrolyzable group at the terminal of the molecular chain of the diorganopolysiloxane.
- an alkoxy group having 1 to 10 carbon atoms such as a methoxy group, an ethoxy group and a propoxy group, a methoxyethoxy group and an ethoxyethoxy group
- An alkoxyalkoxy group having 2 to 10 carbon atoms such as a methoxypropoxy group
- an asyloxy group having 1 to 10 carbon atoms such as an acetoxy group, an octanoyloxy group, and a benzoyloxy group
- a vinyloxy group an isopropenyloxy group, and 1-ethyl.
- An alkenyloxy group having 2 to 10 carbon atoms such as a -2-methylvinyloxy group, a dimethylketooxime group, a methylethylketooxime group, a ketooxime group having 3 to 8 carbon atoms such as a diethylketooxime group, a dimethylamino group and a diethylamino group.
- Substituent amino groups having 2 to 6 carbon atoms such as groups, butylamino groups and cyclohexylamino groups, aminoxi groups having 2 to 6 carbon atoms such as dimethylaminoxi groups and diethylaminoxi groups, N-methylacetamide groups, N- Examples thereof include a substituted amide group having 3 to 8 carbon atoms such as an ethylacetamide group and an N-methylbenzamide group.
- an alkoxy group is preferable, a methoxy group and an ethoxy group are more preferable, and a methoxy group is particularly preferable.
- m indicating the number of repetitions (or degree of polymerization) of the bifunctional diorganosiloxane unit ((R) 2 SiO 2/2) constituting the main chain is this diorgano.
- the viscosity of the polysiloxane at 23 ° C. is 100 to 1,000,000 mPa ⁇ s, and usually m is 20 to 2,000, preferably 22 to 1,600, and more preferably 23 to 1,000. More preferably, it is an integer of about 24 to 500.
- the viscosity is a numerical value measured by a rotational viscometer (for example, BL type, BH type, BS type, cone plate type, etc.) (hereinafter, the same applies).
- the organic polymer in which both ends of the molecular chain of the component (A) are sealed with a silanol group and / or a hydrolyzable silyl group can be used alone or in combination of two or more having different structures and degrees of polymerization as required. can do.
- the content of the organic polymer in which both ends of the molecular chain as the main agent are sealed with silanol groups and / or hydrolyzable silyl groups is not particularly limited, but the composition.
- about 1 to 99% by mass is preferable, about 30 to 90% by mass is more preferable, and about 45 to 65% by mass is further preferable.
- the hydrolyzable (organo) silane compound and / or its partially hydrolyzed condensate which is the component (B) used in the present invention, is a component that acts as a cross-linking agent (hardener), and water such as an alkoxy group is added to the molecule. It is obtained by partially hydrolyzing and condensing a (organo) silane compound having three or more, preferably three or four degradable groups and a partially hydrolyzed condensate thereof (that is, the (organo) silane compound). Examples thereof include (organo) siloxane oligomers having three or more residual hydrolyzable groups in the molecule.
- Examples of the hydrolyzable group include a ketooxime group, an alkoxy group, an acetoxy group, an isopropenoxy group and the like, and an alkoxy group is preferable, and a methoxy group is particularly preferable.
- the ketooxime group, the alkoxy group, and the acetoxy group the same ones as the ketooxym group, the alkoxy group, and the acetoxy group exemplified by Y of the above-mentioned formula (II) can be exemplified.
- Examples of the group (organo group) other than the hydrolyzable group bonded to the silicon atom include unsubstituted or halogen-substituted carbon atoms 1 to 12, which do not contain heteroatoms such as nitrogen atom, oxygen atom and sulfur atom.
- Preferred are 1 to 8 monovalent hydrocarbon groups, and specifically, methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, tert-butyl group, pentyl group, hexyl group and heptyl.
- Alkyl group such as group, octyl group, nonyl group, decyl group, octadecyl group, cycloalkyl group such as cyclopentyl group and cyclohexyl group, vinyl group, allyl group, butenyl group, pentenyl group, alkenyl group such as hexenyl group, phenyl group.
- Aryl groups such as trill group, xsilyl group, ⁇ -, ⁇ -naphthyl group, aralkyl groups such as benzyl group, 2-phenylethyl group and 3-phenylpropyl group, and some of the hydrogen atoms of these groups or Groups in which all are substituted with halogen atoms such as F, Cl, Br, for example, 3-chloropropyl group, 3,3,3-trifluoropropyl group and the like can be exemplified, among which the methyl group, A vinyl group is preferred.
- tetraalkoxysilanes such as tetramethoxysilane, tetraethoxysilane, methylsilicate and ethylsilicate, partially hydrolyzed condensates thereof, methyltrimethoxysilane, methyltriethoxysilane and vinyltrimethoxy
- Organotrialkoxysilanes such as silane, vinyltriethoxysilane, vinyltriisopropoxysilane, methyltris (methoxyethoxy) silane, vinyltris (methoxyethoxy) silane, methyltripropenoxysilane, vinyltriisopropenoxysilane, phenyltriisopropeno Examples thereof include trifunctional hydrolyzable (organo) silane compounds such as organotrialkenyloxysilanes such as xysilanes, organotriacetoxysilanes, and organotriacyloxysilanes such as vinyltri
- methyltrimethoxysilane or vinyltrimethoxysilane is preferably used, but the present invention is not limited thereto. In addition, these can be used alone or in combination of two or more.
- the hydrolyzable (organo) silane compound of the component (B) and / or its partially hydrolyzed condensate has a heteroatom such as a nitrogen atom, an oxygen atom, and a sulfur atom in the molecule in addition to the hydrolyzable group. It does not contain a monovalent hydrocarbon group containing a functional group, and in this respect, it is clearly distinguished from the adhesion promoter (carbon functional silane or silane coupling agent) of the component (F) described later. It is a thing.
- the blending amount of the component (B) is preferably 0.1 to 30 parts by mass, particularly 0.5 to 30 parts by mass, and particularly preferably 1 to 10 parts by mass with respect to 100 parts by mass of the component (A). If it is less than 0.1 part by mass, the cured product of this composition is inferior in mechanical strength, and if it exceeds 30 parts by mass, the mechanical properties of the obtained rubber physical properties are also deteriorated, which causes a problem that it is economically disadvantageous. To do.
- the component (C) used in the present invention is a curing catalyst (non-metallic organic catalyst and / or metal-based catalyst), and acts to accelerate the curing of the room temperature curable resin composition of the present invention.
- non-metallic organic catalyst of the curing catalyst a known one as a curing accelerator of the room temperature curable resin composition can be used, and is not particularly limited.
- phosphazene-containing compounds such as N, N, N', N', N'', N''-hexamethyl-N'''- (trimethylsilylmethyl) -phosphorimidic triamide, hexylamine, dodecylamine phosphate.
- Amine compounds such as or salts thereof, quaternary ammonium salts such as benzyltriethylammonium acetate, dialkylhydroxylamines such as dimethylhydroxylamine and diethylhydroxylamine, tetramethylguanidylpropyltrimethoxysilane, tetramethylguanidylpropylmethyl Examples thereof include silanes and siloxanes containing a guanidyl group such as dimethoxysilane and tetramethylguanidylpropyltris (trimethylsiloxy) silane, but non-metallic organic catalysts are not limited thereto. Further, the non-metallic organic catalyst may be used alone or in combination of two or more.
- alkyl tin ester compounds such as dibutyl tin diacetate, dibutyl tin dilaurate, dibutyl tin dioctate, dibutyl tin bis (acetylacetonate), dioctyl tin dineodecanoate, di-n-butyl-dimethoxytin, tetraisopropoxy.
- Titanium esters or titanium chelate compounds such as titanium, tetra-n-butoxytitanium, tetrakis (2-ethylhexoxy) titanium, dipropoxybis (acetylacetonato) titanium, titanium isopropoxyoctylene glycol, zinc naphthenate, zinc stearate , Zinc-2-ethyloctate, iron-2-ethylhexoate, cobalt-2-ethylhexoate, manganese-2-ethylhexoate, cobalt naphthenate, aluminum isopropylate, aluminum secondary butyrate, etc.
- titanium chelate compounds such as titanium, tetra-n-butoxytitanium, tetrakis (2-ethylhexoxy) titanium, dipropoxybis (acetylacetonato) titanium, titanium isopropoxyoctylene glycol, zinc naphthenate, zinc stearate , Zinc-2-e
- Aluminum chelate compounds such as alcoholate aluminum compounds, aluminum alkyl acetate diisopropilate, aluminum bisethyl acetoacetate monoacetyl acetonate, bismuth neodecanoate (III), bismuth 2-ethylhexanoate (III), bismuth citrate ( III), organic metal compounds such as bismuth octylate, and lower fatty acid salts of alkali metals such as potassium acetate, sodium acetate, and lithium oxalate are exemplified, but the metal-based catalyst is not limited thereto. Further, the metal catalyst may be used alone or in combination of two or more.
- the blending amount of the curing catalyst of the component (C) is 0.001 to 20 parts by mass, preferably 0.01 to 10 parts by mass with respect to 100 parts by mass of the component (A). If the amount of the component (C) is too small, sufficient curability cannot be obtained, and if it is too large, the curability is too fast, resulting in insufficient working time, which is economically disadvantageous.
- the room temperature curable resin composition of the present invention contains an organosilicon compound (D) having an organosiloxane structure, a hydrolyzable silyl group and a hindered amine skeleton in the molecule represented by the following average structural formula (1), such as ultraviolet rays. It is characterized by being contained as a light stabilizer for suppressing deterioration over time due to the action of light.
- organosilicon compound (D) having an organosiloxane structure, a hydrolyzable silyl group and a hindered amine skeleton in the molecule represented by the following average structural formula (1), such as ultraviolet rays. It is characterized by being contained as a light stabilizer for suppressing deterioration over time due to the action of light.
- R 1 and R 2 independently represent an unsubstituted or substituted alkyl group having 1 to 10 carbon atoms, or an unsubstituted or substituted aryl group having 6 to 10 carbon atoms.
- R 1 and R 2 are preferably alkyl groups having 1 to 3 carbon atoms.
- the alkyl group having 1 to 10 carbon atoms may be linear, cyclic or branched, and is preferably a linear alkyl group.
- alkyl groups having 1 to 10 carbon atoms include methyl group, ethyl group, n-propyl group, n-butyl group, n-pentyl group, n-hexyl group, n-heptyl group and n-octyl group. , N-nonyl group, n-decyl group and the like. Among these, methyl group, n-propyl group, n-hexyl group and n-octyl group are preferable, and methyl group is more preferable.
- Specific examples of the aryl group having 6 to 10 carbon atoms include a phenyl group and a naphthyl group, but a phenyl group is preferable.
- R 3 independently contains a hydrogen atom, an unsubstituted or substituted alkyl group having 1 to 20 carbon atoms, an unsubstituted or substituted alkoxy group having 1 to 20 carbon atoms, or an O. (oxyradical).
- R 3 is preferably an alkyl group having a hydrogen atom and 1 to 3 carbon atoms from the viewpoint of weather resistance and crack resistance.
- the alkyl group having 1 to 20 carbon atoms may be linear, cyclic or branched, and is preferably a linear alkyl group.
- alkyl groups having 1 to 20 carbon atoms include methyl group, ethyl group, n-propyl group, n-butyl group, n-pentyl group, n-hexyl group, n-heptyl group and n-octyl group. , N-nonyl group, n-deci group, undecyl group, dodecyl group, icosyl group and the like. Among these, methyl group and n-propyl group are preferable, and methyl group is more preferable.
- the alkyl group thereof may be linear, cyclic or branched.
- alkoxy group having 1 to 20 carbon atoms include a methoxy group, an ethoxy group, an n-propoxy group, an n-butoxy group, an n-pentoxy group, an n-hexoxy group, an n-heptoxy group and an n-octoxy group. , N-nonyloxy group, n-decyloxy group, undecyloxy group, dodecyloxy group, icosiloxy group and the like. Among these, methoxy group and ethoxy group are preferable, and methoxy group is more preferable.
- R 4 independently represents a hydrogen atom or an unsubstituted or substituted alkyl group having 1 to 10 carbon atoms.
- the alkyl group include the same groups as those exemplified in R 1 above, but among them, a methyl group, an n-propyl group, an n-hexyl group and an n-octyl group are preferable, and a methyl group is more preferable.
- a part or all of hydrogen atoms of an alkyl group, an aryl group, and an alkoxy group in these R 1 to R 4 are an alkyl group having 1 to 10 carbon atoms, a halogen atom such as F, Cl, Br, and a cyano group.
- Such a group examples include 3-chloropropyl group, 3,3,3-trifluoropropyl group, 2-cyanoethyl group, tolyl group, xsilyl group and the like. , 3,3,3-trifluoropropyl group is preferable from the viewpoint of weather resistance and crack resistance.
- a 1 independently represents a single-bonded or heteroatom-free, unsubstituted or substituted alkylene group having 1 to 20 carbon atoms.
- the alkylene group having 1 to 20 carbon atoms that does not contain the hetero atom of A 1 may be linear, cyclic, or branched, and specific examples thereof include a methylene group, an ethylene group, a trimethylene group, and a propylene group.
- a 1 is preferably a single bond, an ethylene group, a trimethylene group or an octamethylene group, and more preferably a single bond, an ethylene group or a trimethylene group.
- a part or all of the hydrogen atoms of the alkylene group of A 1 may be substituted with an aryl group having 6 to 20 carbon atoms such as a phenyl group.
- a 2 independently represents a divalent linking group containing a single bond or a heteroatom.
- a 2 is preferably a single bond, an ether bond (-O-), or a silicon bond (-SiR 5 R 6- ). It should be noted that, in the group formed from A 1 , A 2 and Z, a combination having a structure in which oxygen atoms are continuous "-O-O-" and a combination in which a structure in which silicon atoms are continuous "-Si-Si-" is formed. Do not take.
- a 3 independently represents a heteroatom-free, unsubstituted or substituted alkylene group having 2 to 20 carbon atoms.
- the alkylene group having 2 to 20 carbon atoms that does not contain the hetero atom of A 3 may be linear, cyclic, or branched, and specific examples thereof include ethylene group, trimethylene group, propylene group, and isopropylene.
- tetramethylene group isobutylene group, pentamethylene group, hexamethylene group, heptamethylene group, octamethylene group, nonamethylene group, decamethylene group, undecamethylene group, dodecamethylene group, tridecamethylene group, tetradecamethylene group, Alkylene groups such as pentadecamethylene group, hexadecamethylene group, heptadecamethylene group, octadecamethylene group, nonadecamethylene group and eikosadesilene group; cycloalkylene group such as cyclopentylene group and cyclohexylene group can be mentioned. ..
- a 3 is preferably an ethylene group, a trimethylene group, a tetramethylene group or an octamethylene group, and more preferably a trimethylene group, a tetramethylene group or an octamethylene group.
- p is a number from 1 to 10
- q is a number from 1 to 10
- p + q is a number satisfying 2 to 20 corresponding to the valence of Z.
- p is preferably 1 to 5, more preferably 1 to 2, and even more preferably 1.
- q is preferably 1 to 5, more preferably 1 to 2, and even more preferably 1. Therefore, p + q is preferably 2 to 10, more preferably 2 to 4, and even more preferably 2 from the viewpoint of weather resistance and crack resistance.
- Z represents a divalent to 20 valent, preferably 2 to 10 valent, more preferably 2 to 4 valent, and even more preferably divalent group containing an organosiloxane structure.
- Z is not particularly limited as long as it is a group containing an organosiloxane structure, and may have a linear structure, a branched structure, or a crosslinked structure therein. More specifically, an organo (poly) siloxane composed of D unit (R 5 R 6 SiO 2/2 unit), T unit (R 1 SiO 3/2 unit) and / or Q unit (SiO 4/2 unit).
- the structure can be mentioned (R 1 has the same meaning as above.
- R 5 and R 6 have the same meaning as the formula (2) described later).
- Each of these units may be used alone (only D unit, only T unit, or only Q unit), or may consist of a combination of a plurality of units.
- an organopolysiloxane structure containing D units is preferable, and a divalent organopolysiloxane structure containing D units alone is more preferable.
- organosilicon compound of the component (D) a compound having an average structural formula represented by the following formula (2) is preferable, and by using such a compound, better weather resistance and crack resistance are exhibited. Will be done.
- R 1 to R 4 , A 1 , A 2 , A 3 and m have the same meanings as described above.
- R 5 and R 6 have independent or substituted carbon atoms of 1 respectively. It represents an alkyl group of up to 20 or an aryl group having 6 to 10 carbon atoms, and n represents a number of 1 or more.
- R 5 and R 6 independently represent an unsubstituted or substituted alkyl group having 1 to 20 carbon atoms or an aryl group having 6 to 10 carbon atoms, and these alkyl groups, Examples of the aryl group include the same groups as those exemplified in R 3 and R 1 above.
- R 5 and R 6 are preferably an alkyl group having 1 to 3 carbon atoms, and more preferably a methyl group, from the viewpoint of weather resistance and crack resistance.
- n represents a number of 1 or more, and from the viewpoint of weather resistance and crack resistance, a number of 1 to 1,000 is preferable, a number of 1 to 100 is more preferable, and a number of 1 to 50 is further more preferable.
- a number from 1 to 35 is even more preferred.
- the weight average molecular weight of the organosilicon compound as the component (D) is not particularly limited, but the cured product obtained by curing the curable composition containing the compound has sufficient weather resistance and crack resistance.
- the weight average molecular weight is preferably 400 to 100,000, more preferably 400 to 10,000, even more preferably 400 to 5,000, and even more preferably 400 to 3,000.
- organosilicon compound of the component (D) those represented by the following structural formula (3) or (4) are particularly preferable, and by using such an organosilicon compound, weather resistance and crack resistance are further improved. It will be good. (In the formula, R 1 to R 6 , A 1 , A 2 , A 3 , m and n have the same meanings as above.)
- organosilicon compound as the component (D) include the following compounds.
- the organosilicon compound represented by the above formula (1) can be produced by a conventionally known method.
- the organosilicon compound represented by the above formula (2) has an amine compound having an alkenyl group represented by the following structural formula (5) and an organosiloxane structure represented by the average structural formula (6). It can be obtained by reacting with a silane compound having. More specifically, the alkenyl group of the amine compound (5) having an alkenyl group and the hydrosilyl group (Si—H group) of the silane compound (6) having an organosiloxane structure are hydrosilyled in the presence of a platinum compound-containing catalyst. A chemical reaction is carried out to add a hydrosilyl group to the alkenyl group to form a carbon-silicon bond.
- R 1 to R 6 , A 1 , A 2 , m and n have the same meanings as above.
- a 4 is an unsubstituted or substituted carbon atom number 1 containing no single bond or heteroatom. Represents ⁇ 18 alkylene groups.
- a 4 represents an unsubstituted or substituted alkylene group having 1 to 18 carbon atoms which does not contain a single bond or a hetero atom, and has 1 to 18 carbon atoms which do not contain a hetero atom of A 4.
- the alkylene group of 18 may be linear, cyclic or branched, and specific examples thereof include methylene group, ethylene group, trimethylene group, propylene group, isopropylene group, tetramethylene group, isobutylene group and penta.
- a 4 is preferably a methylene group, an ethylene group, or a hexamethylene group.
- amine compound having an alkenyl group represented by the above formula (5) include those represented by the following structural formulas, but are not limited thereto.
- silane compound having an organosiloxane structure represented by the above formula (6) include, but are not limited to, those represented by the following structural formula.
- the number of repetitions of the siloxane unit in parentheses represents an average number, and when the siloxane unit is composed of a plurality of different types of siloxane units, the arrangement order of each siloxane unit in parentheses is arbitrary.
- the platinum compound-containing catalyst used in the above hydrosilylation is not particularly limited, and specific examples thereof include platinum chloride, an alcohol solution of platinum chloride, and platinum-1,3-divinyl-1,1,3. Toluene or xylene solution of 3-tetramethyldisiloxane complex, tetraxtriphenylphosphine platinum, dichlorobistriphenylphosphine platinum, dichlorobisacetoplatinum, dichlorobisbenzonitrile platinum, dichlorocyclooctadiene platinum, platinum-carbon, platinum-alumina, Examples include a carrying catalyst such as platinum-silica.
- a zero-valent platinum complex is preferable from the viewpoint of selectivity, and a toluene or xylene solution of a platinum-1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex is more preferable.
- the amount of the platinum compound-containing catalyst used is not particularly limited, but from the viewpoint of reactivity and productivity, the platinum atom contained in 1 mol of the amine compound having an alkenyl group represented by the formula (5) is contained.
- the amount of 1 ⁇ 10 -7 to 1 ⁇ 10 ⁇ 2 mol is preferable, and the amount of 1 ⁇ 10 -7 to 1 ⁇ 10 -3 mol is more preferable.
- a co-catalyst may be used to improve the reactivity of hydrosilylation.
- a co-catalyst generally used for hydrosilylation can be used, but in the present invention, ammonium salts of inorganic acids, acid amide compounds, and carboxylic acids are preferable.
- ammonium salts of inorganic acids include ammonium chloride, ammonium sulfate, ammonium amide sulfate, ammonium nitrate, monoammonium dihydrogen phosphate, diammonium hydrogen phosphate, triammonium phosphate, ammonium diaphosphate, ammonium carbonate, and hydrogen carbonate.
- ammonium, ammonium sulfide, ammonium borate, and ammonium borofluoride examples thereof include ammonium, ammonium sulfide, ammonium borate, and ammonium borofluoride.
- ammonium salts of inorganic acids having a pKa of 2 or more are preferable, and ammonium carbonate and ammonium hydrogencarbonate are more preferable.
- the acid amide compound examples include formamide, acetamide, N-methylacetamide, N, N-dimethylacetamide, propionamide, acrylamide, malonamide, succinamide, maleamide, fumalamide, benzamide, phthalamide, palmitate amide, stearate amide and the like.
- formamide and stearic acid amide are preferable, and formamide is more preferable.
- carboxylic acids include formic acid, acetic acid, propionic acid, butyric acid, methoxyacetic acid, pentanoic acid, caproic acid, heptanic acid, octanoic acid, lactic acid, glycolic acid, trifluoroacetic acid, maleic acid, fumaric acid, and succinic acid.
- carboxylic acids include formic acid, acetic acid, propionic acid, butyric acid, methoxyacetic acid, pentanoic acid, caproic acid, heptanic acid, octanoic acid, lactic acid, glycolic acid, trifluoroacetic acid, maleic acid, fumaric acid, and succinic acid.
- formic acid, acetic acid, lactic acid, maleic acid, fumaric acid, succinic acid and trifluoroacetic acid are preferable, and acetic acid and trifluoroacetic acid are more preferable.
- the amount of the co-catalyst used is not particularly limited, but from the viewpoint of reactivity, selectivity, cost, etc., 1 ⁇ 10 -5 per 1 mol of the amine compound having an alkenyl group represented by the formula (5). ⁇ 1 ⁇ 10 -1 mol is preferable, and 1 ⁇ 10 -4 to 5 ⁇ 10 -1 mol is more preferable.
- the hydrosilylation reaction proceeds without a solvent, but a solvent can also be used.
- a solvent can also be used.
- usable solvents include hydrocarbon solvents such as pentane, hexane, cyclohexane, heptane, isooctane, benzene, toluene and xylene; ether solvents such as diethyl ether, tetrahydrofuran and dioxane; ethyl acetate, butyl acetate and the like.
- Ester-based solvents such as N, N-dimethylformamide; chlorinated hydrocarbon-based solvents such as dichloromethane and chloroform, and the like, even if one of these solvents is used alone, 2 You may use a mixture of seeds or more.
- the reaction temperature in the hydrosilylation reaction is not particularly limited and can be carried out from 0 ° C. under heating, but 0 to 200 ° C. is preferable. In order to obtain an appropriate reaction rate, the reaction is preferably carried out under heating, and from such a viewpoint, the reaction temperature is more preferably 40 to 110 ° C., and even more preferably 40 to 90 ° C.
- the reaction time is also not particularly limited, and is usually about 1 to 60 hours, preferably 1 to 30 hours, more preferably 1 to 20 hours.
- the reaction ratio of the alkenyl group of the amine compound (5) having an alkenyl group to the hydrosilyl group of the silane compound (6) having an organosiloxane structure suppresses by-products during the hydrosilylation reaction and the obtained organosilicon compound.
- the ratio of the alkenyl group to 0.8 to 1.3 mol is preferable, and the ratio of 0.9 to 1.2 mol is more preferable with respect to 1 mol of the hydrosilyl group. ..
- the room temperature curable resin composition of the present invention contains at least one organosilicon compound represented by the above-mentioned average structural formula (1) (hereinafter referred to as an organosilicon compound (1)).
- the organosilicon compound (1) can be used alone as a light stabilizer, but it can also be used as a light stabilizer composition in which an additive such as a stabilizer and an arbitrary component such as a solvent are appropriately mixed. ..
- the content of the organosilicon compound (1) in this composition is not particularly limited, but is, for example, 90% by mass or more, 70% by mass or more, 50% by mass or more, 30% by mass or more, and 10% by mass or more. 5, 5% by mass or more, 1% by mass or more, and the like can be appropriately set.
- the organosilicon compound (1) contained in the room-temperature curable resin composition of the present invention is derived from the structure of the organosilicon compound, and a room-temperature curable resin composition containing the organosilicon compound is used as compared with a conventional light stabilizer.
- the weather resistance and crack resistance of the obtained cured product are improved.
- the content of the organosilicon compound (1) is not particularly limited, but is preferably about 0.1 to 10% by mass, preferably about 0.5% by mass in the composition. More preferably ⁇ 5% by mass.
- the above-mentioned content means a non-volatile component excluding the solvent.
- the blending amount as the component (D) in the room temperature curable resin composition of the present invention containing at least the components (A) to (D) is 0.01 to 100 parts by mass with respect to the component (A). It is 10 parts by mass, preferably 0.05 to 7.5 parts by mass, and more preferably 0.1 to 5 parts by mass. If the blending amount is too small, the cured product of the present composition will be inferior in weather resistance, and if it is too large, curing failure will occur or it will be economically disadvantageous.
- the component (E) is a filler (inorganic filler and / or organic resin filler), and is an optional component to be blended in the room temperature curable resin composition of the present invention as needed, and is formed from this composition. It is used to give the cured product sufficient mechanical strength.
- Known fillers can be used, for example, fine powder silica, fumigant silica, precipitated silica, silica whose surface is hydrophobized with an organic silicon compound, glass beads, glass balloons, and the like.
- Transparent resin beads silica aerogel, diatomaceous earth, metal oxides such as iron oxide, zinc oxide, titanium oxide, fuming metal oxides, wet silica or those whose surfaces are silane treated, quartz powder, carbon black, talc, zeolite And reinforcing agents such as bentonite, asbestos, glass fibers, carbon fibers, metal carbonates such as calcium carbonate, magnesium carbonate, zinc carbonate, glass wool, fine powder mica, molten silica powder, polystyrene, polyvinyl chloride, synthetic resins such as polypropylene. Powder or the like is used.
- inorganic fillers such as silica, calcium carbonate, and zeolite are preferable, and fumes silica and calcium carbonate whose surface is hydrophobized are particularly preferable. These can be used alone or in combination of two or more.
- the blending amount is preferably 1 to 1,000 parts by mass, particularly 5 to 400 parts by mass with respect to 100 parts by mass of the component (A).
- the cured product obtained from this composition tends to exhibit sufficient mechanical strength when it is blended than when it is not blended, and when it is used in a larger amount than 1,000 parts by mass, the viscosity of the composition increases. Not only does the workability deteriorate, but the rubber strength after curing tends to decrease, making it difficult to obtain rubber elasticity.
- the component (F) is an adhesion accelerator other than the component (B), and is an optional component to be blended in the room temperature curable resin composition of the present invention as needed, and can be used as a cured product formed from this composition. Used to provide sufficient adhesion. Specifically, aminosilanes such as ⁇ -aminopropyltriethoxysilane and 3-2- (aminoethylamino) propyltrimethoxysilane, ⁇ -glycidoxypropyltrimethoxysilane, ⁇ - (3,4-epoxycyclohexyl).
- aminosilanes such as ⁇ -aminopropyltriethoxysilane and 3-2- (aminoethylamino) propyltrimethoxysilane, ⁇ -glycidoxypropyltrimethoxysilane, ⁇ - (3,4-epoxycyclohexyl).
- Epoxysilanes such as ethyltrimethoxysilane, (meth) acrylicsilanes such as ⁇ - (meth) acryloxipropyltrimethoxysilane, ⁇ - (meth) acryloxipropyltriethoxysilane, ⁇ -mercaptopropyltrimethoxysilane
- mercaptosilanes isocyanatesilanes such as ⁇ -isocyanuspropyltrimethoxysilane, and other functional groups having heteroatoms such as nitrogen atom, oxygen atom, and sulfur atom in addition to hydrolyzable groups (provided that guanidyl group is used.
- a hydrolyzable organosilane compound (so-called carbon functional silane or silane coupling agent) having a monovalent hydrocarbon group in the molecule containing (excluding).
- the adhesion accelerator (carbon functional silane or silane coupling agent) of the component (F) contains a functional group having a hetero atom such as a nitrogen atom, an oxygen atom, and a sulfur atom in addition to the hydrolyzable group. It is clearly distinguished from the above-mentioned hydrolyzable (organo) silane compound of the component (B) and / or its partially hydrolyzed condensate in that it has a monovalent hydrocarbon group in the molecule. ..
- the blending amount is preferably 0.1 to 30 parts by mass, particularly 0.5 to 20 parts by mass with respect to 100 parts by mass of the component (A). If it exceeds 30 parts by mass, the curability may be insufficient or it may be economically disadvantageous.
- the component (G) component is a plasticizer, which is an optional component to be blended in the room temperature curable resin composition of the present invention as needed, and has the mechanical properties and flame retardancy of the cured product formed from this composition.
- the viscosity can be adjusted so that it is easy to handle in construction without damaging it.
- plasticizer used in the room temperature curable resin composition of the present invention examples include dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DBP), and diheptyl phthalate (DHP).
- DMP dimethyl phthalate
- DEP diethyl phthalate
- DBP di-n-butyl phthalate
- DHP diheptyl phthalate
- Dioctyl phthalate DOP
- Diisononyl phthalate DINP
- Diisodecyl phthalate DIDP
- Ditridecyl phthalate DTDP
- Butyl benzyl phthalate BBP
- Dicyclohexyl phthalate DCHP
- Tetrahydrophthalate ester Dioctyl adipate (DOA), diisononyl adipate (DINA), diisodecyl adipate (DIDA), di-n-alkyl adipate, dibutyl diglycol adipate (BXA), bis (2-ethylhexyl) azelate (DOZ), sebacin Dibutyl Acid Acid (DBS), Dioctyl Sevacinate (DOS), Dibutyl Maleate (DBM), Di-2-ethylhexyl Maleate (DOM), Dibutyl Fumarate (DBF), Tricrecil Phthalate
- trimellitic acid-based plasticizers include trimellitic acid-based plasticizers, polyester-based plasticizers, chlorinated paraffins.
- Steeric acid-based plasticizers silicone oils such as dimethylpolysiloxane (non-functional organopolysiloxane), and recently, petroleum-based high-boiling solvents such as polyoxypropylene glycol-based, paraffin-based, naphthen-based, and isoparaffin-based Can be mentioned. These are used alone or in combination of two or more.
- the blending amount thereof is preferably 1 to 1,000 parts by mass, more preferably 2 to 500 parts by mass, still more preferably 2 parts by mass with respect to 100 parts by mass of the component (A). Is 5 to 200 parts by mass.
- the amount of the component (G) is within the above range, the viscosity can be adjusted to be easy to handle in construction without impairing the mechanical properties and flame retardancy of the room temperature curable resin composition of the present invention, which is preferable.
- the room temperature curable resin composition of the present invention may contain pigments, dyes, antioxidants, antioxidants, antistatic agents, antimony oxides, chlorinated paraffins and the like as additives within the range not impairing the object of the present invention.
- Known additives such as flame retardants can be blended.
- a thixophilic improver, a fungicide, and an antibacterial agent can be blended.
- the room temperature curable resin composition of the present invention may use an organic solvent if necessary.
- the organic solvent include aliphatic hydrocarbon compounds such as n-hexane, n-heptane, isooctane, and isododecane, aromatic hydrocarbon compounds such as toluene and xylene, hexamethyldisiloxane, octamethyltrisiloxane, and decamethyltetra.
- Siloxane dodecamethylpentasiloxane
- chain siloxane such as 2- (trimethylsiloxy) -1,1,1,2,3,3,3-heptamethyltrisiloxane, octamethylcyclopentasiloxane, decamethylcyclopentasiloxane, etc. Cyclic siloxane and the like.
- the amount of the organic solvent may be appropriately adjusted within a range that does not interfere with the effects of the present invention.
- the room temperature curable resin composition of the present invention can be obtained by uniformly mixing the above-mentioned components and predetermined amounts of the above-mentioned various additives in a dry atmosphere. Further, the room temperature curable resin composition of the present invention is cured by being left at room temperature, and known methods and conditions depending on the type of the composition can be adopted as the molding method, curing conditions and the like. ..
- the obtained cured product shows good flexibility and has rubber elasticity, so that it is useful as a coating agent, an adhesive, and a sealing agent (for example, a building sealant).
- a coating agent for example, a building sealant.
- the method of using the room temperature curable resin composition of the present invention as a coating agent, an adhesive, and a sealing agent may be in accordance with conventionally known usage methods, and is not particularly limited.
- Examples of articles on which a coating layer made of a cured product of the room temperature curable resin composition of the present invention is formed include articles composed of glasses, various resins, various metals, and the like.
- the material and shape of the above are not particularly limited.
- Examples of the article to be adhered and / or sealed with the cured product of the room temperature curable resin composition of the present invention include articles composed of glass, various metals and the like, and the material and shape of the base material. Is not particularly limited.
- part means “part by mass”.
- the viscosity of each product is a value measured at 23 ° C. by an Ostwald viscometer, and the molecular weight is a polystyrene-equivalent weight average molecular weight determined by GPC (gel permeation chromatography) measurement.
- the silicone average composition of each product was calculated from the integrated values of the detection spectra in 1 H-NMR and 29 Si-NMR using a 300 MHz-NMR measuring device manufactured by JEOL Ltd.
- MS Polymer S-303H Metaldimethoxysilyl group-blocking polyoxypropylene polymer at both ends of molecular chain, number average molecular weight: about 17,000, manufactured by Kaneka Co., Ltd.
- Carlex 300 light calcium carbonate, Maruo calcium
- 60 parts manufactured by Maruo Calcium Co., Ltd.
- 40 parts of MC coat P-20 heavy calcium carbonate, manufactured by Maruo Calcium Co., Ltd.
- Example 2 The composition 2 was prepared in the same manner as in Example 1 above except that the organosilicon compound 1 was changed to the organosilicon compound 2 obtained in Synthesis Example 2.
- Example 3 The composition 3 was prepared in the same manner as in Example 1 above except that the organosilicon compound 1 was changed to the organosilicon compound 3 obtained in Synthesis Example 3.
- Example 4 The composition 4 was prepared in the same manner as in Example 1 above except that the organosilicon compound 1 was changed to the organosilicon compound 4 obtained in Synthesis Example 4.
- composition 5 was prepared in the same manner as in Example 1 above except that the organosilicon compound 1 was not added.
- compositions of Examples 1 to 4 in which the organosilicon compounds 1 to 4 were used as the light stabilizers were used in Comparative Example 1 in which the light stabilizer was not used, and the light stability used for general purposes. It can be seen that it has high crack resistance and weather resistance as compared with the compositions of Comparative Examples 2 and 3 using the agent.
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Abstract
Description
上記の経時劣化の対応策として、ベンゾトリアゾールやベンゾフェノン等の紫外線吸収剤、ニッケル錯体等の安定化剤、ヒンダードフェノール系、特に2,6-ビス(tert-ブチル)-ヒドロキシトルエン等の酸化防止剤と共に、光安定化、特に耐候性付与に優れた効果を示すことが知られているヒンダードアミン系光安定剤が一般的に配合されている。
1.
分子鎖両末端がシラノール基及び/又は加水分解性シリル基で封鎖された有機ポリマーを主剤とし、かつ、下記平均構造式(1)で表される有機ケイ素化合物を含有する室温硬化性樹脂組成物。
2.
(A)分子鎖両末端がシラノール基及び/又は加水分解性シリル基で封鎖された有機ポリマー:100質量部、
(B)加水分解性(オルガノ)シラン化合物及び/又はその部分加水分解縮合物:0.1~30質量部、
(C)硬化触媒:0.001~20質量部、
(D)平均構造式(1)で表される有機ケイ素化合物:0.01~10質量部
を含有するものである1に記載の室温硬化性樹脂組成物。
3.
平均構造式(1)で表される有機ケイ素化合物が、下記平均構造式(2)で表される有機ケイ素化合物である1又は2に記載の室温硬化性樹脂組成物。
4.
平均構造式(2)で表される有機ケイ素化合物が、下記構造式(3)及び/又は(4)で表される有機ケイ素化合物である3に記載の室温硬化性樹脂組成物。
5.
更に、(A)成分100質量部に対して、
(E)充填剤:1~1,000質量部、
(F)(B)成分以外の接着促進剤:0.1~30質量部、
(G)可塑剤:1~1,000質量部
から選ばれる1種又は2種以上の成分を含有するものである2~4のいずれかに記載の室温硬化性樹脂組成物。
6.
1~5のいずれかに記載の室温硬化性樹脂組成物からなるコーティング剤。
7.
1~5のいずれかに記載の室温硬化性樹脂組成物からなる接着剤。
8.
1~5のいずれかに記載の室温硬化性樹脂組成物からなるシーリング剤。
9.
1~5のいずれかに記載の室温硬化性樹脂組成物の硬化物からなる被覆層を有する物品。
10.
1~5のいずれかに記載の室温硬化性樹脂組成物の硬化物で接着及び/又はシールされた物品。
本発明の室温硬化性樹脂組成物は、分子鎖両末端がシラノール基及び/又は加水分解性シリル基で封鎖された有機ポリマーを主剤とし、かつ、下記平均構造式(1)で表される有機ケイ素化合物を含有するものである。
(A)分子鎖両末端がシラノール基及び/又は加水分解性シリル基で封鎖された有機ポリマー、
(B)加水分解性(オルガノ)シラン化合物及び/又はその部分加水分解縮合物、
(C)硬化触媒、
(D)上記平均構造式(1)で表される有機ケイ素化合物。
以下に、各成分について説明する。
本発明に用いられる(A)成分は、分子鎖両末端がシラノール基(ケイ素原子に結合した水酸基)及び/又は加水分解性シリル基で封鎖された有機ポリマーであり、本発明の室温硬化性樹脂組成物において主剤(ベースポリマー)として作用するものである。このようなベースポリマーとしては、変成シリコーンポリマー、シリル化ウレタンポリマー、シリル化アクリレートポリマー、又はシリコーンポリマーが好ましい。
なお、本発明において、分子量(又は重合度)は、例えば、テトラヒドロフラン(THF)、トルエン等を展開溶媒として、ゲルパーミエーションクロマトグラフィ(GPC)分析におけるポリスチレン換算の数平均分子量(又は数平均重合度)又は重量平均分子量(又は重量平均重合度)等として求めることができる(以下、同じ)。
ここで、該ジオルガノポリシロキサンの23℃における粘度は、100~1,000,000mPa・sが好ましく、より好ましくは300~500,000mPa・s、特に好ましくは500~100,000mPa・s、とりわけ1,000~80,000mPa・sである。なお、粘度は回転粘度計(例えば、BL型、BH型、BS型、コーンプレート型等)による数値である(以下、同じ。)。
本発明に用いられる(B)成分である加水分解性(オルガノ)シラン化合物及び/又はその部分加水分解縮合物は架橋剤(硬化剤)として作用する成分であり、分子中にアルコキシ基等の加水分解性基を3個以上、好ましくは3個又は4個有する(オルガノ)シラン化合物及びそれらの部分加水分解縮合物(即ち、該(オルガノ)シラン化合物を部分的に加水分解縮合して得られる、分子中に残存加水分解性基を3個以上有する(オルガノ)シロキサンオリゴマー)等が挙げられる。
ここで、ケトオキシム基、アルコキシ基、アセトキシ基としては、上述した式(II)のYで例示したケトオキシム基、アルコキシ基、アセトキシ基と同様のものを例示することができる。
なお、(B)成分の加水分解性(オルガノ)シラン化合物及び/又はその部分加水分解縮合物は、加水分解性基以外に、分子中に窒素原子、酸素原子、硫黄原子等のヘテロ原子を有する官能性基を含有する1価炭化水素基を含有しないものであって、この点において後述する(F)成分の接着促進剤(カーボンファンクショナルシラン又はシランカップリング剤)とは明確に区別されるものである。
本発明に用いられる(C)成分は、硬化触媒(非金属系有機触媒及び/又は金属系触媒)であり、本発明の室温硬化性樹脂組成物の硬化を促進するために作用する。
本発明の室温硬化性樹脂組成物は、下記平均構造式(1)で表される、分子中にオルガノシロキサン構造と加水分解性シリル基とヒンダードアミン骨格を有する有機ケイ素化合物(D)を、紫外線等の光の作用による経時劣化を抑制するための光安定剤として含むことを特徴とする。
炭素原子数6~10のアリール基の具体例としては、フェニル基、ナフチル基等が挙げられるが、フェニル基が好ましい。
R3としては、耐候性及び耐クラック性の観点から、好ましくは、水素原子、炭素原子数1~3のアルキル基である。炭素原子数1~20のアルキル基は、直鎖状、環状、分枝状のいずれでもよく、好ましくは直鎖状のアルキル基である。
炭素原子数1~20のアルキル基の具体例としては、メチル基、エチル基、n-プロピル基、n-ブチル基、n-ペンチル基、n-ヘキシル基、n-ヘプチル基、n-オクチル基、n-ノニル基、n-デシ基、ウンデシル基、ドデシル基、イコシル基等が挙げられるが、これらの中でも、メチル基、n-プロピル基が好ましく、メチル基がより好ましい。
炭素原子数1~20のアルコキシ基において、その中のアルキル基は、直鎖状、環状、分枝状のいずれでもよい。
炭素原子数1~20のアルコキシ基の具体例としては、メトキシ基、エトキシ基、n-プロポキシ基、n-ブトキシ基、n-ペントキシ基、n-ヘキソキシ基、n-ヘプトキシ基、n-オクトキシ基、n-ノニロキシ基、n-デシロキシ基、ウンデシロキシ基、ドデシロキシ基、イコシロキシ基等が挙げられるが、これらの中でも、メトキシ基、エトキシ基が好ましく、メトキシ基がより好ましい。
なお、これらR1~R4における、アルキル基、アリール基、アルコキシ基の水素原子の一部又は全部は、炭素原子数1~10のアルキル基、F、Cl、Br等のハロゲン原子、シアノ基等で置換されていてもよく、そのような基の具体例としては、3-クロロプロピル基、3,3,3-トリフルオロプロピル基、2-シアノエチル基、トリル基、キシリル基等が挙げられ、耐候性、耐クラック性の観点から、3,3,3-トリフルオロプロピル基が好ましい。
A1のヘテロ原子を含まない炭素原子数1~20のアルキレン基は、直鎖状、環状、分枝状のいずれでもよく、その具体例としては、メチレン基、エチレン基、トリメチレン基、プロピレン基、イソプロピレン基、テトラメチレン基、イソブチレン基、ペンタメチレン基、ヘキサメチレン基、ヘプタメチレン基、オクタメチレン基、ノナメチレン基、デカメチレン基、ウンデカメチレン基、ドデカメチレン基、トリデカメチレン基、テトラデカメチレン基、ペンタデカメチレン基、ヘキサデカメチレン基、へプタデカメチレン基、オクタデカメチレン基、ノナデカメチレン基、エイコサデシレン基等のアルキレン基;シクロペンチレン基、シクロヘキシレン基等のシクロアルキレン基などが挙げられる。
これらの中でも、A1は、単結合、エチレン基、トリメチレン基、オクタメチレン基が好ましく、単結合、エチレン基、トリメチレン基がより好ましい。
なお、A1のアルキレン基の水素原子の一部又は全部は、フェニル基等の炭素原子数6~20のアリール基等で置換されていてもよい。
A2のヘテロ原子を含有する2価の連結基の具体例としては、エーテル結合(-O-)、チオエーテル結合(-S-)、アミノ結合(-NH-)、スルホニル結合(-S(=O)2-)、ホスフィニル結合(-P(=O)OH-)、オキソ結合(-C(=O)-)、チオオキソ結合(-C(=S)-)、エステル結合(-C(=O)O-)、チオエステル結合(-C(=O)S-)、チオノエステル結合(-C(=S)O-)、ジチオエステル結合(-C(=S)S-)、炭酸エステル結合(-OC(=O)O-)、チオ炭酸エステル結合(-OC(=S)O-)、アミド結合(-C(=O)NH-)、チオアミド結合(-C(=S)NH-)、ウレタン結合(-OC(=O)NH-)、チオウレタン結合(-SC(=O)NH-)、チオノウレタン結合(-OC(=S)NH-)、ジチオウレタン結合(-SC(=S)NH-)、尿素結合(-NHC(=O)NH-)、チオ尿素結合(-NHC(=S)NH-)、ケイ素結合(-SiR5R6-、R5及びR6は、後述のR5及びR6と同じ意味を表す。)等が挙げられる。
これらの中でも、A2は、単結合、エーテル結合(-O-)、又はケイ素結合(-SiR5R6-)が好ましい。
なお、A1、A2及びZから形成される基において、酸素原子が連続する構造「-O-O-」となる組み合わせや、ケイ素原子が連続する構造「-Si-Si-」となる組み合わせはとらない。
A3のヘテロ原子を含まない炭素原子数2~20のアルキレン基は、直鎖状、環状、分枝状のいずれでもよく、その具体例としては、エチレン基、トリメチレン基、プロピレン基、イソプロピレン基、テトラメチレン基、イソブチレン基、ペンタメチレン基、ヘキサメチレン基、ヘプタメチレン基、オクタメチレン基、ノナメチレン基、デカメチレン基、ウンデカメチレン基、ドデカメチレン基、トリデカメチレン基、テトラデカメチレン基、ペンタデカメチレン基、ヘキサデカメチレン基、へプタデカメチレン基、オクタデカメチレン基、ノナデカメチレン基、エイコサデシレン基等のアルキレン基;シクロペンチレン基、シクロヘキシレン基等のシクロアルキレン基などが挙げられる。
これらの中でも、A3は、エチレン基、トリメチレン基、テトラメチレン基、オクタメチレン基が好ましく、トリメチレン基、テトラメチレン基、オクタメチレン基がより好ましい。
pは、1~10の数、qは、1~10の数、かつ、p+qは、Zの価数に対応して2~20を満たす数を表す。
pは、耐候性、耐クラック性の観点から1~5が好ましく、1~2がより好ましく、1がより一層好ましい。
qは、耐候性、耐クラック性の観点から1~5が好ましく、1~2がより好ましく、1がより一層好ましい。
したがって、p+qは、耐候性、耐クラック性の観点から2~10が好ましく、2~4がより好ましく、2がより一層好ましい。
Zは、オルガノシロキサン構造を含む基であれば特に限定されるものではなく、その中に直鎖状構造、分岐状構造、又は架橋構造を有していてもよい。
より具体的には、D単位(R5R6SiO2/2単位)、T単位(R1SiO3/2単位)及び/又はQ単位(SiO4/2単位)からなるオルガノ(ポリ)シロキサン構造が挙げられる(R1は、上記と同じ意味を表す。R5、R6は、後述の式(2)と同じ。)。
これらの単位は、それぞれ単独(D単位のみ、T単位のみ、又はQ単位のみ)でも、複数単位の組み合わせからなるものでもよい。
特に、耐候性及び耐クラック性の観点から、D単位を含むオルガノポリシロキサン構造が好ましく、D単位単独の2価のオルガノポリシロキサン構造がより好ましい。
特に、R5及びR6は、耐候性、耐クラック性の観点から、好ましくは、炭素原子数1~3のアルキル基、より好ましくはメチル基である。
また、nは、1以上の数を表すが、耐候性、耐クラック性の観点から、1~1,000の数が好ましく、1~100の数がより好ましく、1~50の数がより一層好ましく、1~35の数が更に好ましい。
例えば、上記式(2)で表される有機ケイ素化合物は、下記構造式(5)で表される、アルケニル基を有するアミン化合物と、平均構造式(6)で表される、オルガノシロキサン構造を有するシラン化合物とを反応させて得ることができる。
より具体的には、アルケニル基を有するアミン化合物(5)のアルケニル基と、オルガノシロキサン構造を有するシラン化合物(6)のヒドロシリル基(Si-H基)を、白金化合物含有触媒の存在下でヒドロシリル化反応を行い、アルケニル基にヒドロシリル基を付加させて炭素-ケイ素結合を形成する。
これらの中でも、選択性の面から、0価の白金錯体が好ましく、白金-1,3-ジビニル-1,1,3,3-テトラメチルジシロキサン錯体のトルエン又はキシレン溶液がより好ましい。
無機酸のアンモニウム塩の具体例としては、塩化アンモニウム、硫酸アンモニウム、アミド硫酸アンモニウム、硝酸アンモニウム、リン酸二水素一アンモニウム、リン酸水素二アンモニウム、リン酸三アンモニウム、ジ亜リン酸アンモニウム、炭酸アンモニウム、炭酸水素アンモニウム、硫化アンモニウム、ホウ酸アンモニウム、ホウフッ化アンモニウム等が挙げられるが、中でも、pKaが2以上の無機酸のアンモニウム塩が好ましく、炭酸アンモニウム、炭酸水素アンモニウムがより好ましい。
カルボン酸の具体例としては、ギ酸、酢酸、プロピオン酸、酪酸、メトキシ酢酸、ペンタン酸、カプロン酸、ヘプタン酸、オクタン酸、乳酸、グリコール酸、トリフルオロ酢酸、マレイン酸、フマル酸、コハク酸、酒石酸、シュウ酸等が挙げられ、これらの中でも、ギ酸、酢酸、乳酸、マレイン酸、フマル酸、コハク酸、トリフルオロ酢酸が好ましく、酢酸、トリフルオロ酢酸がより好ましい。
使用可能な溶媒の具体例としては、ペンタン、ヘキサン、シクロヘキサン、ヘプタン、イソオクタン、ベンゼン、トルエン、キシレン等の炭化水素系溶媒;ジエチルエーテル、テトラヒドロフラン、ジオキサン等のエーテル系溶媒;酢酸エチル、酢酸ブチル等のエステル系溶媒;N,N-ジメチルホルムアミド等の非プロトン性極性溶媒;ジクロロメタン、クロロホルム等の塩素化炭化水素系溶媒などが挙げられ、これらの溶媒は、1種を単独で用いても、2種以上を混合して用いてもよい。
適度な反応速度を得るためには加熱下で反応させることが好ましく、このような観点から、反応温度は40~110℃がより好ましく、40~90℃がより一層好ましい。
また、反応時間も特に限定されるものではなく、通常、1~60時間程度であるが、1~30時間が好ましく、1~20時間がより好ましい。
有機ケイ素化合物(1)は、それ単独で光安定剤として使用することもできるが、安定化剤等の添加剤、溶媒等の任意成分を適宜混合した光安定剤組成物として使用することもできる。
この組成物において、有機ケイ素化合物(1)の含有量は特に限定されるものではないが、例えば、90質量%以上、70質量%以上、50質量%以上、30質量%以上、10質量%以上、5質量%以上、1質量%以上等で適宜設定できる。
本発明の室温硬化性樹脂組成物において、有機ケイ素化合物(1)の含有量は、特に限定されるものではないが、組成物中に、0.1~10質量%程度が好ましく、0.5~5質量%がより好ましい。なお、光安定剤が溶剤を含む場合、上記含有量は、溶剤を除いた不揮発分を意味する。
また、上記(A)~(D)成分を少なくとも含有する本発明の室温硬化性樹脂組成物における(D)成分としての配合量は、前記(A)成分100質量部に対して0.01~10質量部であり、好ましくは0.05~7.5質量部であり、より好ましくは0.1~5質量部である。配合量が少なすぎると本組成物の硬化物が耐候性に劣るものとなり、多すぎると硬化不良を起こしたり経済的に不利になる。
(E)成分は充填剤(無機質充填剤及び/又は有機樹脂充填剤)であり、必要に応じて本発明の室温硬化性樹脂組成物に配合される任意成分であって、この組成物から形成される硬化物に十分な機械的強度を与えるために使用される。この充填剤としては公知のものを使用することができ、例えば、微粉末シリカ、煙霧質シリカ、沈降性シリカ、これらのシリカ表面を有機ケイ素化合物で疎水化処理したシリカ、ガラスビーズ、ガラスバルーン、透明樹脂ビーズ、シリカエアロゲル、珪藻土、酸化鉄、酸化亜鉛、酸化チタン、煙霧状金属酸化物などの金属酸化物、湿式シリカあるいはこれらの表面をシラン処理したもの、石英粉末、カーボンブラック、タルク、ゼオライト及びベントナイト等の補強剤、アスベスト、ガラス繊維、炭素繊維、炭酸カルシウム、炭酸マグネシウム、炭酸亜鉛などの金属炭酸塩、ガラスウール、微粉マイカ、溶融シリカ粉末、ポリスチレン、ポリ塩化ビニル、ポリプロピレンなどの合成樹脂粉末等が使用される。これらの充填剤のうち、シリカ、炭酸カルシウム、ゼオライトなどの無機質充填剤が好ましく、特に表面を疎水化処理した煙霧質シリカ、炭酸カルシウムが好ましい。これらは1種単独でも2種以上を組み合わせても使用することができる。
(F)成分は(B)成分以外の接着促進剤であり、必要に応じて本発明の室温硬化性樹脂組成物に配合される任意成分であって、この組成物から形成される硬化物に十分な接着性を与えるために使用される。具体的には、γ-アミノプロピルトリエトキシシラン、3-2-(アミノエチルアミノ)プロピルトリメトキシシラン等のアミノシラン類、γ-グリシドキシプロピルトリメトキシシラン、β-(3,4-エポキシシクロヘキシル)エチルトリメトキシシラン等のエポキシシラン類、γ-(メタ)アクリロキシプロピルトリメトキシシラン、γ-(メタ)アクリロキシプロピルトリエトキシシラン等の(メタ)アクリルシラン類、γ-メルカプトプロピルトリメトキシシラン等のメルカプトシラン類、γ-イソシアネートプロピルトリメトキシシラン等のイソシアネートシラン類などの、加水分解性基以外に窒素原子、酸素原子、硫黄原子等のヘテロ原子を有する官能性基(但し、グアニジル基を除く)を含有する1価炭化水素基を分子中に有する加水分解性オルガノシラン化合物(いわゆるカーボンファンクショナルシラン又はシランカップリング剤)等を配合することが好ましい。なお、(F)成分の接着促進剤(カーボンファンクショナルシラン又はシランカップリング剤)は、加水分解性基以外に、窒素原子、酸素原子、硫黄原子等のヘテロ原子を有する官能性基を含有する1価炭化水素基を分子中に有するものである点において上述した上記(B)成分の加水分解性(オルガノ)シラン化合物及び/又はその部分加水分解縮合物とは明確に区別されるものである。
(G)成分は可塑剤であり、必要に応じて本発明の室温硬化性樹脂組成物に配合される任意成分であって、この組成物から形成される硬化物の機械特性や難燃性を損なうことなく、施工上取り扱い易い粘度に調整することができる。
また、本発明の室温硬化性樹脂組成物には、本発明の目的を損なわない範囲で添加剤として、顔料、染料、老化防止剤、酸化防止剤、帯電防止剤、酸化アンチモン、塩化パラフィン等の難燃剤など公知の添加剤を配合することができる。更に、チクソ性向上剤、防かび剤、抗菌剤を配合することもできる。
撹拌機、還流冷却器、滴下ロート及び温度計を備えた300mLセパラブルフラスコに、下記式(7)で表されるアルケニル基を有するアミン化合物65.0g、白金-1,3-ジビニル-1,1,3,3-テトラメチルジシロキサン錯体のトルエン溶液0.58g(アルケニル基を有するアミン化合物1molに対し白金原子として5.0×10-5mol)を納め、80℃に加熱した。その中に、下記式(8)で表されるオルガノシロキサン構造を有するシラン化合物83.8gを滴下投入し、80℃にて2時間加熱撹拌した。1H-NMR測定により原料のアルケニル基及びヒドロシリル基由来のピークが完全に消失したことを確認し、反応終了とした。反応終了後の混合物について減圧留去(80℃、5mmHg)を1時間実施し、濾過することで、対応する有機ケイ素化合物1を148g得た。
得られた有機ケイ素化合物1は、淡黄色透明液体であり、粘度13mm2/s、重量平均分子量480、また下記式(9)で表されるものであった。
撹拌機、還流冷却器、滴下ロート及び温度計を備えた300mLセパラブルフラスコに、下記式(10)で表されるアルケニル基を有するアミン化合物69.6g、白金-1,3-ジビニル-1,1,3,3-テトラメチルジシロキサン錯体のトルエン溶液0.58g(アルケニル基を有するアミン化合物1molに対し白金原子として5.0×10-5mol)を納め、80℃に加熱した。その中に、上記式(8)で表されるオルガノシロキサン構造を有するシラン化合物83.8gを滴下投入し、80℃にて2時間加熱撹拌した。1H-NMR測定により原料のアルケニル基及びヒドロシリル基由来のピークが完全に消失したことを確認し、反応終了とした。反応終了後の混合物について減圧留去(80℃、5mmHg)を1時間実施し、濾過することで、対応する有機ケイ素化合物2を152g得た。
得られた有機ケイ素化合物2は、黄色透明液体であり、粘度15mm2/s、重量平均分子量490、また下記式(11)で表されるものであった。
上記式(8)で表されるオルガノシロキサン構造を有するシラン化合物83.8gを、下記平均構造式(12)で表されるオルガノポリシロキサン構造を有するシラン化合物717.9gに変更し、300mLセパラブルフラスコを1Lセパラブルフラスコに変更した以外は、合成例1と同様の手順で合成し、対応する有機ケイ素化合物3を775g得た。
得られた有機ケイ素化合物3は、淡黄色透明液体であり、粘度165mm2/s、重量平均分子量2,590、また下記平均構造式(13)で表されるものであった。
上記式(8)で表されるオルガノシロキサン構造を有するシラン化合物83.8gを、上記式(12)で表されるオルガノポリシロキサン構造を有するシラン化合物717.9gに変更し、300mLセパラブルフラスコを1Lセパラブルフラスコに変更した以外は、合成例2と同様の手順で合成し、対応する有機ケイ素化合物4を780g得た。
得られた有機ケイ素化合物4は、淡黄色透明液体であり、粘度150mm2/s、重量平均分子量2,630、また下記平均構造式(14)で表されるものであった。
MSポリマーS-303H(分子鎖両末端メチルジメトキシシリル基封鎖ポリオキシプロピレン重合体、数平均分子量:約17,000、(株)カネカ製)100部と、カーレックス300(軽質炭酸カルシウム、丸尾カルシウム(株)製)60部、MCコートP-20(重質炭酸カルシウム、丸尾カルシウム(株)製)40部を減圧条件下均一になるまで混合した。次いで、ビニルトリメトキシシラン2部、ネオスタンU-220H(ジブチル錫系硬化触媒、日東化成(株)製)1部、合成例1で得られた有機ケイ素化合物1 1部を湿気遮断下で均一になるまで混合して組成物1を調製した。
有機ケイ素化合物1を合成例2で得られた有機ケイ素化合物2に変えた以外は上記実施例1と同様にして、組成物2を調製した。
有機ケイ素化合物1を合成例3で得られた有機ケイ素化合物3に変えた以外は上記実施例1と同様にして、組成物3を調製した。
有機ケイ素化合物1を合成例4で得られた有機ケイ素化合物4に変えた以外は上記実施例1と同様にして、組成物4を調製した。
有機ケイ素化合物1を添加しなかった以外は上記実施例1と同様にして、組成物5を調製した。
有機ケイ素化合物1を汎用の紫外線吸収剤であるTINUVIN765(分子中にオルガノシロキサン構造及び加水分解性シリル基を有さないヒンダードアミン化合物、BASFジャパン(株)製)に変えた以外は上記実施例1と同様にして、組成物6を調製した。
有機ケイ素化合物1を汎用の紫外線吸収剤であるTINUVIN770DF(分子中にオルガノシロキサン構造及び加水分解性シリル基を有さないヒンダードアミン化合物、BASFジャパン(株)製)に変えた以外は上記実施例1と同様にして、組成物7を調製した。
実施例1~4及び比較例1~3で調製された各組成物1~7を厚さ2mmのシート状に押し出し、23℃,50%RHの空気中に7日間放置して、硬化物を得た。次いで、得られた硬化物をJIS A 1415の表1に規定するWS-Aによるオープンフレームカーボンアークランプによるウエザーメーター試験条件に暴露し、暴露2,000時間まで表面クラックの成長によって硬化物が破断するまでの時間を確認した。暴露2,000時間の試験で破断が無い場合は〇を記録した。
以上の結果を組成物の配合量と共に表1に示す。
Claims (10)
- 分子鎖両末端がシラノール基及び/又は加水分解性シリル基で封鎖された有機ポリマーを主剤とし、かつ、下記平均構造式(1)で表される有機ケイ素化合物を含有する室温硬化性樹脂組成物。
- (A)分子鎖両末端がシラノール基及び/又は加水分解性シリル基で封鎖された有機ポリマー:100質量部、
(B)加水分解性(オルガノ)シラン化合物及び/又はその部分加水分解縮合物:0.1~30質量部、
(C)硬化触媒:0.001~20質量部、
(D)平均構造式(1)で表される有機ケイ素化合物:0.01~10質量部
を含有するものである請求項1に記載の室温硬化性樹脂組成物。 - 更に、(A)成分100質量部に対して、
(E)充填剤:1~1,000質量部、
(F)(B)成分以外の接着促進剤:0.1~30質量部、
(G)可塑剤:1~1,000質量部
から選ばれる1種又は2種以上の成分を含有するものである請求項2~4のいずれか1項に記載の室温硬化性樹脂組成物。 - 請求項1~5のいずれか1項に記載の室温硬化性樹脂組成物からなるコーティング剤。
- 請求項1~5のいずれか1項に記載の室温硬化性樹脂組成物からなる接着剤。
- 請求項1~5のいずれか1項に記載の室温硬化性樹脂組成物からなるシーリング剤。
- 請求項1~5のいずれか1項に記載の室温硬化性樹脂組成物の硬化物からなる被覆層を有する物品。
- 請求項1~5のいずれか1項に記載の室温硬化性樹脂組成物の硬化物で接着及び/又はシールされた物品。
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