Patent ID: 7645345
Filing Date: 2010-01-12
Classification: C11D

Abstract:
1. A method of machine washing dishes, comprising machine washing dishes with a composition comprising a copolymer containing sulfonic acid groups which comprises: (a) 30 to 95 mol % of at least one monoethylenically unsaturated carboxylic acid, one monoethylenically unsaturated carboxylic ester or one water-soluble salt of a monoethylenically unsaturated carboxylic acid, (b) 3 to 35 mol % of at least one monomer containing sulfonic acid groups of the formula I wherein R is hydrogen or methyl; X is —COO—R R M is hydrogen, alkali metal or ammonium, and (c) 2 to 35 mol % of at least one nonionic monomer of the formula II wherein R R R R n is 3 to 50, in random or block copolymerized form.