Patent ID: 6451899
Filing Date: 2002-09-17
Classification: C08L,C09D

Abstract:
An aqueous formulation comprising a blend of an aqueous dispersion comprising:i. at least one hydrophilic particulate polymer P1, as an aqueous dispersion, which is composed of ethylenically unsaturated monomers M comprising: from 20 to 100% by weight of at least one monoethylenic ally unsaturated monomer M1 having a water-solubility in the range from 10 to 100 g/l (at 25Â° C. and 1 bar), from 0 to less than 80% by weight of one or more monoethylenically unsaturated monomers M2 having a water-solubility below 10 g/l (at 25Â° C. and 1 bar), and from 0 to 20% by weight of one or more monomers M3 which are different from the monomers M1 and M2, and ii. at least one hydrophobic particulate polymer P2, as an aqueous dispersion, which is composed of ethylenically unsaturated monomers Mâ€² comprising: from 0 to less than 20% by weight of one or more monoethylenically unsaturated monomers M1â€² having a water-solubility in the range from 10 to 100 g/l (at 25Â° C. and 1 bar), from 80 to 100% by weight of at least one monoethylenically unsaturated monomer M2â€² having a water-solubility below 10 g/l (at 25Â° C. and 1 bar), and from 0 to 20% by weight of one or more monomers M3â€² which are different from the monomers M1â€² and M2â€², and where the glass transition temperature Tg1 of the polymer P1 is less than 10 K different from the glass transition temperature Tg2 of the polymer P2 and where the proportions by weight of the monomers M1, M2 and M3 and of the monomers M1â€², M2â€² and M3â€² respectively add up in each case to 100 by weight.