Coating composition
AssigneeDow Corning Toray Co., Ltd.
InventorsToru Masatomi, Motoshi Sasaki, Hideki Kobayashi
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Abstract
A coating agent composition of the present invention consists of: (A) an acrylic-type copolymer that has a weight-average molecular weight within the range of 3,000 to 100,000 and contains in its side molecular chains hydrolysable silyl groups of the following formula: —COO-Q-SiR2n(OR3)3-n and organosiloxysilyl groups of the following formula: —COO-Q-Si(OSiR43)3; and (B) a condensation-reaction accelerating catalyst. Prior to curing, the composition demonstrates excellent storage stability and coating properties, while after curing the composition produces a coating film of high hardness that has excellent water-repellent properties and durability.
Claims21
A coating agent composition comprising:
- (A) 100 parts by weight of an acrylic-type copolymer that has a weight-average molecular weight within the range of 3,000 to 100,000 and is obtained by radical-polymerization of the following constituents:
- (A1) 100 parts by weight of a silane compound represented by the following general formula (1):
- CH2=C(R1)—COO-Q-SiR2n(OR3)3-n (1)
- (where R1 is a hydrogen atom or a methyl group, Q is a bivalent aliphatic hydrocarbon group with 2 to 6 carbon atoms, R2 is a non-substituted or substituted univalent hydrocarbon group having 1 to 8 carbon atoms, R3 is an aliphatic hydrocarbon group having 1 to 4 carbon atoms, and n is an integer from 0 to 2);
- (A2) 80 to 250 parts by weight of one or more types of vinyl-polymerizable compounds with unsaturated bonds selected from an acrylic-type compound (except for constituent (A1)), a vinyl-type compound, and styrene-type compound;
- (A3) 10 to 50 parts by weight of a siloxysilane compound represented by the following general formula (2):
- CH2=C(R1)—COO-Q-Si(OSiR43)3. (2)
- (where R1 and Q are the same as defined above, and R4 is an alkyl group with 1 to 4 carbon atoms);
- and
- (B) a catalytic quantity of a condensation-reaction accelerating catalyst.
Dependencies are inferred from the claim text.