US 12,252,571 B2
Vinyl acetate-silicone copolymer resin and method for producing same
Koki Uchida, Echizen (JP); and Kentaro Watanabe, Echizen (JP)
Assigned to NISSIN CHEMICAL INDUSTRY CO., LTD., Fukui-ken (JP)
Filed by Nissin Chemical Industry Co., Ltd., Echizen (JP)
Filed on Feb. 16, 2022, as Appl. No. 17/672,917.
Claims priority of application No. 2021-030514 (JP), filed on Feb. 26, 2021.
Prior Publication US 2022/0275134 A1, Sep. 1, 2022
Int. Cl. C08F 283/12 (2006.01); C08F 218/08 (2006.01)
CPC C08F 283/124 (2013.01) [C08F 283/122 (2013.01); C08F 218/08 (2013.01); C08F 283/12 (2013.01)] 8 Claims
 
1. A vinyl acetate-silicone copolymer resin obtained by graft polymerization of vinyl acetate (B) onto an organopolysiloxane (A) of the following general formula (1), wherein
a weight ratio of the organopolysiloxane (A) to the vinyl acetate (B) is (A):(B)=30:70 to 70:30,

OG Complex Work Unit Chemistry
 wherein R1 is the same or different substituted or unsubstituted monovalent hydrocarbon group of 1 to 20 carbon atoms selected from the group consisting of alkyl groups, cycloalkyl groups, aryl groups, alkenylaryl groups, alkenylaralkyl groups, a substituted one in which a part or all hydrogen atoms of the above groups are substituted with a halogen atom, a carboxyl group, an alkoxy group, an alkenyloxy group, an amino group, and an alkyl-, alkoxy- or (meth)acryloxy-substituted amino group, R2 is a mercapto, acryloxy or methacryloxy group-substituted alkyl group having 1 to 6 carbon atoms, or a vinyl group, X is the same or different substituted or unsubstituted monovalent hydrocarbon group of 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, or a hydroxyl group, Y is the same or different group of X or —[O—Si(X)2]d—X, at least one of Y being a hydroxyl group or —[O—Si(X)2]d-X, at least two of X and Y being hydroxyl groups, Z is an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a hydroxyl group, a is a positive number of 0 to 1,000, b is a positive number of 100 to 10,000, c is a positive number of 1 to 10, and d is a positive number of 1 to 1,000, and wherein the vinyl acetate-silicone copolymer resin is an emulsion having a viscosity (25° C.) of 1 to 500 mPa·s.