Patent ID: 9115236
Filing Date: 2015-08-25
Classification: C02F,C08F,C09K,C23F

Abstract:
1. Copolymer comprising: A) at least one monomer unit a) derived from at least one ethylenically unsaturated aliphatic monocarboxylic or polycarboxylic acid, a corresponding anhydride, or a corresponding water-soluble salt; B) at least one monomer unit b) derived from an ethylenically unsaturated sulfonated or sulfated monomer unit b) with the formula (I) in which formula the various symbols have the following meaning: or at least one monomer unit b′) derived from an ethylenically unsaturated sulfonated monomer unit other than (b) with the formula (II) in which formula the various symbols have the following meaning: C) at least one monomer unit (c), wherein the at least one monomer unit (c) comprises a diphosphate ester derived from polyoxyethylene alkyl ether phosphate, wherein the polyoxyethylene alkyl ether phosphate has the general formula Wherein: