Patent ID: 7462588
Filing Date: 2008-12-09
Classification: C11D

Abstract:
1. A machine dishwasher detergent comprising at least one polymer comprising cationic monomer units, at least one anionic polymer modified with phosphorus- and/or sulfur containing groups containing as a monomer at least one unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid, maleic acid and mixtures thereof and at least one monomer containing sulfonic acid groups selected from the group consisting of 1-acrylamido-1-propanesulfonic acid, 2-acrylamido-2-propanesulfonic acid, 2-acrylamido-2-methyl-1-propanesulfonic acid, 2-methacrylamido-2-methyl-1-propanesulfonic acid, 3-methacrylamido-2-hydroxypropanesulfonic acid, allylsulfonic acid, methallylsulfonic acid, allyloxybenzenesulfonic acid, methallyloxybenzenesulfonic acid, 2-hydroxy-3-(2-propenyloxy)-propanesulfonic acid, 2-methyl-2-propene-1-sulfonic acid, vinylsulfonic acid, 3-sulfopropylacrylate, 3-sulfopropylmethacrylate, sulfomethacrylamide, sulfomethylmethacrylamide, water-soluble salts of the above-identified acids and mixtures thereof, and at least one non-ionic surfactant having a content below 5% by weight based on the total weight of the dishwasher detergent, wherein the pH value of a 1% by weight solution of the anionic polymer in distilled water is below 6 at 20° C.