Patent ID: 6489398
Filing Date: 2002-12-03
Classification: C08G,C09D

Abstract:
An air-drying water-dilutable brushing paint, comprising as a binder, an alkyd resin with a content of from 30 to 70% by weight of fatty acids, which fatty acids comprise unsaturated fatty acids and fatty acid graft copolymers, 10 to 25% by weight of polyalcohols having 2 to 6 hydroxyl groups, 10 to 20% by weight of aromatic or aliphatic dicarboxylic acids, 0% by weight of a polyethylene glycol, and an intrinsic viscosity of from about 7 to 16 ml/g, measured in chloroform at 20Â° C.,wherein said alkyd resin has free carboxyl groups in an amount corresponding to an acid value of from about 25 to 70 mg/g, at least 80% of said carboxyl groups being derived from methacrylic acid units, and wherein from 10 to 40%, based on the weight of the alkyd resin, of said fatty acids are fatty acid graft polymers made by copolymerizing a mixture of 30 to 50% by weight of unsaturated fatty acids, 10 to 25% by weight of methacrylic acid, and 30 to 55% by weight of monomers selected from the group consisting of vinyl monomers and (meth)acryl monomers having no other functional group other than the â€”C&boxH;Câ€” bond, all based on the weight of the resulting graft copolymer, and wherein at least 80% of the comonomers that are grafted together with the methacrylic acid, when polymerized separately, form benzene-soluble homopolymers.