Patent ID: 6605182
Filing Date: 2003-08-12
Classification: C08F,C08G,C11D,D06L,D21C

Abstract:
A water soluble alkali metal salt of (co)poly-&agr;-hydroxyacrylic acid based polymer made by free radical polymerization in acidic medium followed by reaction with a base and comprising;(s) at least one carbohydrate unit; and, (a) at least one unit which is an alkali metal salt of 2-hydroxy-2-carboxylic acid ethylene-1,2-unit; and optionally (b) a unit (b), which is a unit derived from polymerization of an &agr;,&bgr;-ethylenically unsaturated aliphatic carboxylic acid monomer having 3 to 6 carbon atoms, and further where unit denoted as (s) in the polymer ranges from 16 mole % to 67 mole %.