US 12,760,197 B2 · Coating composition and coated article

Abstract

According to the present invention, a coating composition which contains (A) a hydrolyzable silyl group-containing acrylic resin, (B) an organopolysiloxane that is represented by average unit formula (I), and (C) a curing catalyst is able to be produced by a simple process. The coating composition forms a cured coating film that has excellent cracking resistance, coating film hardness, chemical resistance, alkali resistance, heat resistance and weather resistance. Formula (I) is: (SiO4/2)a (R1SiO3/2) (R12SiO2/2)c (R13SiO1/2)d (R2O1/2)e (I) wherein R1 represents a monovalent hydrocarbon group, and at least one of the R1 moieties represents a substituted or unsubstituted aryl group; R2 represents a hydrogen atom or an alkyl group; a, b, c and d represent numbers that satisfy a=0, 0.5≤b≤0.6, 0.4≤c≤0.5, d=0, and a+b+c+d=1; and e represents a number that satisfies 0<e≤4.

Claims8

Dependent claims

A coating composition comprising

(A) 100 parts by weight of a hydrolyzable silyl group-containing acrylic resin,
(B) 5 to 50 parts by weight of an organopolysiloxane, and
(C) 0.1 to 50 parts by weight of a curing catalyst,
the organopolysiloxane (B) having the average unit formula (I):
(SiO4/2)a (R1SiO3/2)b(R12SiO2/2)c(R13SiO1/2)d(R201/2)e(I)
wherein R1 is each independently a C1-C12 substituted or unsubstituted monovalent hydrocarbon group, at least one R1 being a C6-C12 substituted or unsubstituted aryl group, R2 is hydrogen or a C1-C6 alkyl group, a, b, c and d are numbers satisfying a=0, 0.5≤b≤0.6, 0.4≤c≤0.5, d=0, and a+b+c+d=1, and e is a number satisfying 0<e≤4, and
in formula (I), the C6-C12 substituted or unsubstituted aryl group accounts for 40% to 43% of the total number of R1.

4 more elements

Dependencies are inferred from the claim text.

Coating composition and coated article

Life of this patent

Coating composition and coated article

Life of this patent

Abstract

Claims8