Patent ID: 6362148
Filing Date: 2002-03-26
Classification: C11D

Abstract:
An anti-lime scale cleaning composition which comprises:(a) 0.01% to 10% of at least a surfactant, excluding cationic surfactants; (b) 0.01% to 5% of a polyethylene oxide polycarboxylic acid copolymer having the structure of: wherein R1 is H or methyl group, R2 is H or an alkyl group having from 1 to 4 carbons, the ratio of x to y is about 8:1 to 10:1, m is about 80 to about 100, the weight ratio of polycarboxylate to polyethylene oxide side chains is about 20/80 and the molecular mass is about 90,000 to about 110,000;(c) the balance being water wherein the composition does not contain an amino containing polymer, a silicon containing polymer, a nonionic surfactant containing ethoxylate groups, a copolymer of polyvinyl pyrrolidone or polyvinyl pyrridine N-oxide polymers.