Patent ID: 6180589
Filing Date: 2001-01-30
Classification: C08G,C11D

Abstract:
A polyether hydroxycarboxylate copolymer comprising ##STR8##wherein M.sup.+ is a cation having a +1 charge, or M.sup.+ is a (M.sup.+2).sub.1/2, wherein M is independently selected from the group consisting of hydrogen, ammonia, alkali metals, alkaline earth metals, zinc, copper, organic amines, amino acids, and amino saccharides; R.sub.1 is the residue of an ethylenically unsaturated comonomer having at least one functional group which is selected from the group consisting of carboxylic acid, sulfonic acid and phosphonic acid; R.sub.2 and R.sub.3 are independently selected from the group consisting of hydrogen, and a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms; n is from about 2 to about 100: x.sub.1 and x.sub.2 are 1; a is from 1 to 99 mole percent; and b is from 99 to 1 mole percent, provided that (a+b) is 100 mole percent.