US 12,435,240 B2
Coating composition for an outer wall or exterior of building, and an article comprising the coating composition
Kentaro Watanabe, Echizen (JP)
Assigned to NISSIN CHEMICAL INDUSTRY CO., LTD., Echizen (JP)
Filed by Nissin Chemical Industry Co., Ltd., Echizen (JP)
Filed on Jan. 27, 2022, as Appl. No. 17/585,975.
Claims priority of application No. 2021-011998 (JP), filed on Jan. 28, 2021.
Prior Publication US 2022/0243092 A1, Aug. 4, 2022
Int. Cl. C09D 183/04 (2006.01); C08G 77/20 (2006.01); C08L 83/04 (2006.01); C09D 7/40 (2018.01); C09D 7/61 (2018.01); E04F 13/08 (2006.01)
CPC C09D 183/04 (2013.01) [C08G 77/20 (2013.01); C08L 83/04 (2013.01); C09D 7/40 (2018.01); C09D 7/61 (2018.01); E04F 13/08 (2013.01); C08L 2201/02 (2013.01); C08L 2201/52 (2013.01); C08L 2205/02 (2013.01); Y10T 428/31663 (2015.04)] 7 Claims
 
1. A water-based coating composition for an outer wall or exterior of building, wherein the coating composition comprises water and the following components (A) to (D),
(A) an emulsion of a silicone acrylic copolymer resin having a glass transition temperature of 0° C. or higher, and formed by copolymerization of 70 to 90 parts by mass of (a1) a polyorganosiloxane represented by the following formula (1) and 10 to 30 parts by mass of (a2) an acrylic acid alkyl ester monomer and/or a methacrylic acid alkyl ester monomer, a total amount of components (a1) and (a2) is 100 parts by mass, wherein the emulsion particles of the emulsion of the silicone acrylic copolymer resin (A) have an average particle diameter of 230 nm to 350 nm, and, in the acrylic acid alkyl ester monomer and/or a methacrylic acid alkyl ester monomer, the alkyl ester is a 1 to 6 carbon alkyl ester,

OG Complex Work Unit Chemistry
wherein R1 is, independently of each other, a substituted or unsubstituted monovalent hydrocarbon group having 1 to 6 carbon atoms, precluding the groups defined for R2 and a phenyl group; R2 is, independently of each other, an alkyl group which has 1 to 6 carbon atoms and of which a part of the hydrogen atoms bonded to the carbon atom is substituted with a methacryloxy group; R1 bonded to the siloxane unit in the square bracket b is a methyl group; R3 is, independently of each other, a phenyl group or the group defined for R1, and at least one of R3s bonded to the same silicon atom is a phenyl group; and X is, independently of each other, an alkoxy group having 1 to 4 carbon atoms, or a hydroxyl group; a, b, c and d are the number satisfying equations, 0.6722≤a/(a+b+c+d)<0.9993, 0.0003≤b/(a+b+c+d)≤0.0048, 0≤c/(a+b+c+d)≤0.285, and 0.0004≤d/(a+b+c+d)≤0.038;
wherein (a1) the polyorganosiloxane is obtained by a reaction of a silane coupling agent and a cyclic organopolysiloxane, in a ratio such that the silane coupling agent is 0.08 to 0.32 part by mass, relative to 100 parts by mass of the cyclic organopolysiloxane, the emulsion being in an amount of 3.8 to 15.4 parts by mass as a solid content,
(B) at least one resin emulsion in an amount of 61.6 to 73.2 parts by mass as a solid content, selected from the group consisting of an acrylic resin emulsion, a urethane resin emulsion, and an alkyd resin emulsion,
(C) pigment in an amount of 5 to 19.2 parts by mass as a solid content, and
(D) a flame retardant in an amount of 1 to 3.8 parts by mass as a solid content,
provided that a total mass of the solid contents of components (A) and (B) and the amounts of components (C) and (D) is 100 parts by mass.