# US 5,344,880 A · Thermosetting composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,344,880 A - Document ID: US5344880A - Status: Granted - Kind: A - Application number: 08/013,186 - Filed: 1993-01-29 - Granted: 1994-09-06 - Earliest claimed: 1989-04-06 - Assignees: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha - Inventors: Toshiro Nambu; Hirotoshi Kawaguchi; Hisao Furukawa; Yasushi Kato - Web page: https://patentgrep.com/patent/US5344880A ## CPC - C08L 33/066: {containing -OH groups} - C08L 43/04: Homopolymers or copolymers of monomers containing silicon - C08L 83/04: Polysiloxanes - C08G 77/12: containing silicon bound to hydrogen - C08G 77/14: containing silicon bound to oxygen-containing groups - C08G 77/16: to hydroxy groups - C08G 77/18: to alkoxy or aryloxy groups - C08G 77/20: containing silicon bound to unsaturated aliphatic groups - C08G 77/26: nitrogen-containing groups - C08G 77/28: sulfur-containing groups - C08G 77/70: {Siloxanes defined by use of the MDTQ nomenclature} - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS ## Abstract A composition including (A) a hydroxyl group-containing acrylic resin, (B) an acrylic copolymer containing an alkoxysilyl group having the formula (I): ##STR1## (C) a polyorganosiloxane and (D) a curing catalyst. The composition can give the film with excellent weatherability, stain resistance, acid resistance, water repellency and durability and with no bad-smelling odor. ## Claims ### Claim 1 A composition comprising a blend of components (A), (B) and (C), wherein (A) is a hydroxyl group-containing acrylic resin which does not contain an alkoxysilyl group, (B) is an acrylic copolymer containing an alkoxysilyl group having the formula (I): ##STR10## wherein R.sup.1 is an alkyl group having 1 to 10 carbon atoms, R.sup.2 is a hydrogen atom, an alkyl group, an aryl group or an aralkyl group, and a is 0, 1 or 2, (C) is a polyorganosiloxane bearing one or more reactive groups selected from the group consisting of a silano group, an alkoxysilyl group, an alcoholic hydroxyl group, a glycidyl group, an amino group, a mercapto group a carboxyl group, an amide group, a vinyl group, an acryloyloxy group and a methacryloyloxy group and further comprising (D) a curing catalyst. ### Claim 2 (depends on 1) The composition of claim 1, wherein said resin (A) has a hydroxyl value of 10 to 300 mgKOH/g. ### Claim 3 (depends on 1) The composition of claim 1, wherein said resin (A) has a number average molecular weight of 1,500 to 40,000. ### Claim 4 (depends on 1) The composition of claim 1, wherein said formula (I) is the formula: ##STR11## wherein R.sup.3 is hydrogen atom, an alkyl group, an aryl group or an aralkyl group and R.sup.1, R.sup.2 and a are as defined above. ### Claim 5 (depends on 1) The composition of claim 1, wherein said copolymer (B) is a copolymer having 5 to 90% by weight of units of an alkoxysilyl vinyl monomer having a polymerizable unsaturated double bond and an alkoxysilyl group. ### Claim 6 (depends on 1) The composition of claim 1, wherein said polyorganosiloxane (C) is a polyorganosiloxane having a reactive functional group at its one or both ends, or its side chain. ### Claim 7 (depends on 1) The composition of claim 1, wherein said curing catalyst (D) is at least one member selected from the group consisting of an organotin compound, an acid phosphate, a mixture of an acid phosphate and an amine a reaction product of an acid phosphate and an amine, a saturated polyvalent carboxylic acid, an unsaturated polyvalent carboxylic acid, a saturated polyvalent carboxylic acid anhydride, an unsaturated polyvalent carboxylic acid anhydride, an organic titanium compound and an organic aluminum compound. ### Claim 8 (depends on 1) The composition of claim 1, which further comprises a hydrolyzable ester compound as a dehydrating agent and an alkyl alcohol as solvent. ### Claim 9 (depends on 1) The composition of claim 1, which further comprises at least one compound selected from the group consisting of methyl silicate, alkoxy substituted silanes, a condensation product of methylsilicate or an alkoxy substituted silane, a reaction product of a silane coupling agent containing an amino group with a silane coupling agent containing an epoxy group, a reaction product of a silane coupling agent containing an amino group with a compound containing an epoxy group, and a reaction product of a silane coupling agent containing an epoxy group with an amine-containing compound. ### Claim 10 (depends on 1) The composition of claim 1, which further comprises an ultraviolet absorber and a light stabilizer. ### Claim 11 A composition comprising a blend of components (A), (B) and (C), wherein (A) is a hydroxyl group-containing acrylic resin which does not contain an alkoxysilyl group, (B) is an acrylic copolymer containing an alkoxysilyl group having the formula (I): ##STR12## wherein R.sup.1 is an alkyl group having 1 to 10 carbon atoms, R.sup.2 is a hydrogen atom, an alkyl group, an aryl group or an aralkyl group, and a is 0, 1 or 2, (C) is a polyorganosiloxane bearing one or more reactive groups selected from the group consisting of a silanol group, an alkoxysilyl group, an alcoholic hydroxyl group, a glycidyl group, an amino group, a mercapto group, a carboxyl group, an amide group, a vinyl group, an acryloyloxy group and a methacryloyloxy group and further comprising (D) a curing catalyst, wherein said acrylic resin (A) is an acrylic copolymer which contains a hydroxyl group derived from at least one member selected from the group consisting of an acrylic monomer containing a hydroxyl group, a methacrylic monomer containing a hydroxyl group, a polycaprolactone containing an acryloyl group and a polycaprolactone containing a methacryloyl group. ### Claim 12 (depends on 1) The composition of claim 1, wherein the ratio of the component (A) to the component (B) is from 9/1 to 1/9 by weight. ### Claim 13 (depends on 1) The composition of claim 1, wherein the ratio of the component (A) to the component (B) is from 8/2 to 2/8 by weight. ### Claim 14 (depends on 1) The composition of claim 1, wherein said polyorganosiloxane (c) is present in an amount of 0.01 to 100 parts by weight per 100 parts by weight of the total of the components (A) and (B).