Patent ID: 6107403
Filing Date: 2000-08-22
Classification: C08G,C09D

Abstract:
A solvent borne coating composition comprising:(A) at least one component which contains hydroxyl groups, comprising(A1) from 20 to 60% by weight of at least one polyester having an OH number of 90 to 130, a molecular weight of 1300 to 3500 and a polydispersity of from 5 to 50, and(A2) from 40 to 80% by weight of at least one polyacrylate resin which contains hydroxyl groups and has been prepared, at least partially, in the presence of component (A1), from(a) from 5 to 50% by weight of one or more monomers selected from the group consisting of 4-hydroxy-n-butyl acrylate, 4-hydroxy-n-butyl methacrylate, 3-hydroxy-n-butyl acrylate, 3-hydroxy-n-butyl methacrylate and hydroxyethyl methacrylate,and monomers selected from the group consisting of(b) ethylenically unsaturated, copolymerizable monomers containing hydroxyl groups and different from (a) and mixtures of such monomers,(c) aliphatic and cycloaliphatic esters of methacrylic acid, aliphatic and cycloaliphatic esters of acrylic acid which are different from (a) and (b), and mixtures of such monomers,(d) copolymerizable vinyl esters different from (a), (b) and (c), and mixtures of such monomers,(e) aromatic vinyl hydrocarbons different from (a), (b), (c) and (d) and mixtures of such monomers, and(f) additional ethylenically unsaturated monomer which is different from (a), (b), (c), (d) and (e) or a mixture of such monomers, the sum of the proportions by weight of monomers (a) to (f) being in each case 100% by weight,(B) at least one crosslinking agent, and(C) a compound selected from the group consisting of aromatic mono-and polycarboxylic acids, anhdyrides of aromatic polycarboxylic acids and mixtures thereof, wherein said compound (C) is added to component (A) after its preparation or to the coating composition.