Patent ID: 7361407

Claim:
A stain resistant coating composition, which comprises: from 3 to 80 percent by weight of (F′) a modified resin having an organosilicate structure part and an acrylic resin structure part that is prepared by polymerizing a mixture of polymerizable monomers for constructing the acrylic resin structure part in the presence of a non-radical polymerizable organosilicate for constructing the organosilicate structure part, wherein the mixture of polymerizable monomers for constructing the acrylic resin structure part includes (i) one or more hydroxyl group-containing radical polymerizable monomers, (ii) one or more epoxy group-containing radical polymerizable monomers and (iii) a radical polymerizable monomer having one or more organic groups represented by the formula (3): wherein R 8 is hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R 9 is an alkyl group having 1 to 4 carbon atoms and y is an integer from 1 to 10, wherein the content of the (i) hydroxyl group-containing radical polymerizable monomers is from 1 to 15 percent by weight of all monomers for constructing the acrylic resin structure part, wherein the content of the (ii) epoxy group-containing radical polymerizable monomers is from 5 to 60 percent by weight of all monomers for constructing the acrylic resin structure part, wherein the content of the (iii) radical polymerizable monomer having one or more organic groups represented by the formula (3) is from 1 to 40 percent by weight of all monomers for constructing the acrylic resin structure part, and wherein the non-radical polymerizable organosilicate is represented by formula (2): (R 3 ) n —Si—(OR 4 ) 4-n (2), wherein R 3 and R 4 are each hydrogen atom, an alkyl group having 1 to 10 carbon atoms or an aryl group having 1 to 10 carbon atoms and n is 0 or 1, and/or a condensate thereof, and from 3 to 80 percents by weight of (B) a compound having in the molecule at least one functional group selected from the group consisting of a carboxyl group, a carboxylic acid anhydride group and a carboxyl group blocked with an alkylvinyl ether compound, and from 0.1 to 30 percents by weight of (C) an organosilicate represented by formula (1): (R 1 ) m —Si—(OR 2 ) 4-m (1), wherein R 1 and R 2 are each hydrogen atom, an alkyl group having 1 to 10 carbon atoms or an aryl group having 1 to 10 carbon atoms and m is 0 or 1, and/or a condensate thereof.