Patent ID: 6790272
Filing Date: 2004-09-14
Classification: C08F,C09D

Abstract:
An emulsion paint, comprising:i) a polymeric binder, which comprises at least one copolymer P of ethylenically unsaturated monomers M in the form of an aqueous polymer dispersion; ii) at least one inorganic pigment; iii) an inorganic filler/extender; and iv) an auxiliary; wherein said copolymer P has a glass transition temperature Tg in the range of from âˆ’10 to +50Â° C.; and wherein said copolymer P consists of the following units in polymerized form a) 20 to 80% by weight of at least one monomer M2a, whose homopolymer has a glass transition temperature of >30Â° C., and which is selected from the group consisting of styrene, &agr;-methylstyrene, methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, iso-propyl-methacrylate, n-butyl methacrylate, iso-butyl methacrylate, tert-butyl metracrylate, vinyl acetate, acrylonitrile and metacrylonitrile; b) 20 to 79.7% by weight of at least one monomer M2b, whose homopolymer has a glass transition temperature of <20Â° C. and which is selected from the group consisting of C1-C12-alkyl acrylates, butadiene, vinyl versatates, ethyl acrylate, n-butyl acrylate, and 2-ethylhexyl acrylate; c) 0.5 to 1.5% by weight of c1) a first acidic monomer M1 selected from the group consisting of itaconic acid, a salt of itaconic acid, an anhydride of itaconic acid, and mixtures thereof, or c2) mixtures of said first acidic monomer with 0 to 0.75% by weight of a second acidic monomer selected from the group consisting of acrylic acid and methacrylic acid, provided that a total amount of said first acidic monomer and said second acidic monomer is from 0.5 to 1.5% by weight, based on a total weight of said copolymer P; and a weight ratio of said second acidic monomer to said fit acidic monomer does not exceed 1:1; and d) 0.2 to 5% by weight of at least one monomer M3 having at least one urea group; wherein a sum of the amounts of monomers M1, M2a, M2b and M3 is 100% by weight; wherein said emulsion paint contains no cross-linking additive.