Patent ID: 8309648

Claim:
A coating composition comprising a resin binder component and a defoamer formulation, wherein the defoamer formulation comprises a), b), and c) defined below: a) a graft copolymer of the Formula wherein A are polymerizable monomers or comonomers selected from the group consisting of alkyl vinyl ether, phenyl vinyl ether, allyl ether, acrylate, methacrylate, olefin, maleic anhydride and styrene; [A] m represents a homopolymer or copolymer or a mixture thereof containing one or more monomers A and being a graft backbone and being selected from the group consisting of poly alkyl vinyl ether, poly phenyl vinyl ether, poly allyl ether, polyacrylate, poly methacrylate, poly(alkyl vinyl ether-co-acrylate), polypropylene, polybutadiene, alkyl vinyl ether-maleic anhydride copolymer, polystyrene, copolymers thereof and mixtures thereof; [B] n resents units in the backbone [A] m+n where a branch is grafted from a unit in the backbone; Y are polymerizable monomers or comonomers selected from the group consisting of (meth)acrylate, styrene and vinyl acetate; [Y] p is a grafting chain which is a homo/copolymer of one or more monomers selected from the group consisting of (meth)acrylate, styrene and vinyl acetate; p=1-5000, m is a number between 1-5000, n is a number of 1-5000; and m+n is a number of 30-5000; b) polymer, mixed polymers or copolymer [A] m+n ; and c) polymer, mixed polymer or copolymer of the monomer(s) Y.