Patent ID: 6727316
Filing Date: 2004-04-27
Classification: B05D,C08F,C08L,C09D

Abstract:
A coating composition for use as a surfacer coatings and antistonechip primer coating, comprisingA) a binder comprising at least one copolymer made by free-radical polymerization of a) at least one olefinically unsaturated monomer and b) at least one olefinically unsaturated monomer different than the olefinically unsaturated monomer (a) and of the general formula I R1R2C&boxH;CR3R4â€ƒâ€ƒ(I), in which the radicals R1, R2, R3 and R4 each independently of one another are hydrogen atoms or substituted or unsubstituted alkyl, cycloalkyl, alkylcycloalkyl, cycloalkylalkyl, aryl, alkylaryl, cycloalkylaryl, arylalkyl or arylcycloalkyl radicals, with the proviso that at least two of the variables R1, R2, R3 and R4 are substituted or unsubstituted aryl, arylalkyl or arylcycloalkyl radicals, in an aqueous medium; and(B) at least one pigment and/or filler, said coating composition having a pigment/binder ratio (B):(A) of from 4:1 to 1:4; wherein at least one ofI) the copolymer is obtained by (i) subjecting at least one monomer (a) and at least one monomer (b) to free-radical polymerization in an aqueous medium to provide a reaction product, and then (ii) reacting the reaction product with at least one further monomer (a) under free-radical conditions, II) the substituents in one or more of the radicals R1, R2, R3 or R4 of the compound (b) are electron-donating or electron-withdrawing atoms or organic radicals; III) at least one of the aryl radicals R1, R2, R3 or R4 of the compound (b) comprise phenyl or naphthyl radicals and the substituents in one or more of the radicals R1, R2, R3 or R4 of the compound (b) are selected from the group consisting of halogen atoms, nitrile, nitro, partially or fully halogenated alkyl, cycloalkyl, alkylcycloalkyl, cycloalkylalkyl, aryl, alkylaryl, cycloalkylaryl, arylalkyl and arylcycloalkyl radicals; aryloxy, alkyloxy and cycloalkyloxy radicals; arylthio, alkylthio and cycloalkylthio radicals; hydroxyl groups, primary, secondary and/or tertiary amino groups, and mixtures thereof.