Patent ID: 8038014
Filing Date: 2011-10-18
Classification: B01D,B44C,C09D,D21H,Y10T

Abstract:
1. A process for impregnating or coating base paper or filter material comprising resinating by impregnating the paper or the filter material with an aqueous polymer dispersion obtainable by free-radical emulsion polymerization, wherein the polymer of said aqueous polymer dispersion is comprised of monomer units as follows: a) 0.1-5% by weight of methacrylic acid, c) 0.1-4% by weight of N-methylolacrylamide, d) 30-98.8% by weight of principal monomers M, and e) 0-20% by weight of monomers other than a, c-d wherein said polymer comprise 1-10% by weight of methyl methacrylate wherein the principal monomers M are selected from the group consisting of C