Patent ID: 7863372
Filing Date: 2011-01-04
Classification: C08F

Abstract:
1. Aqueous secondary copolymer dispersions comprising a copolymer (P) synthesized from a mixture of free-radically polymerizable monomers (M) comprising M1 and M2, and, optionally, M3, M4, M5 and M6, wherein (M1) are cycloaliphatic esters of acrylic and/or methylacrylic acid, (M2) are vinyl esters of branched, aliphatic carboxylic acids of formula (I) wherein R (M3) are hydroxy-functional, free-radically polymerizable monomers, (M4) are carboxyl-functional, free-radically polymerizable monomers, (M5) are hydroxyl- and carboxyl-free (meth)acrylic esters having C1 to C18 hydrocarbon radicals in the alcohol moiety and/or vinylaromatics, and (M6) are monomers different from (M1) to (M5); wherein said copolymer (P) has an OH number of 35 to 200 mg KOH/g solids and an acid number of 10 to 50 mg KOH/g solids.