Patent ID: 7998279

Claim:
A method of cleaning a dishware with a liquid detergent composition comprising an amphiphilic graft polymer; said method comprising the steps of contacting said composition with said dishware, wherein said polymer is a random graft copolymer having a hydrophilic backbone comprising monomers selected from the group consisting of ethers, alcohols, aldehydes, ketones or esters, sugar units, alkoxy units, and saturated polyalcohols, and mixtures thereof, and hydrophobic side chains selected from the group consisting of a C 4-25 alkyl group, polypropylene, polybutylene, and a mixture thereof; wherein the graft polymer is further characterized by being based on water-soluble polyalkylene oxides comprising alkylene oxide units (A) as backbone and side chains formed by polymerization of a vinyl ester component (B), said polymer having an average of ≦1 graft site per 50 alkylene oxide units and mean molar masses M w of from about 3,000 to about 100,000; wherein the graft polymer has (A) from about 20% to about 70% by weight of the water-soluble polyalkylene oxide as a backbone, wherein the polyalkylene oxide is capped at least at one end by a C1-C25 alkyl group having a mean molar mass Mn from 1500 to 20,000; (B) side chains formed by free-radical polymerization in the presence of (A) of from about 30% to about 80% by weight of a vinyl ester component composed of (B1) from about 70% to about 100% by weight of vinyl acetate and/or vinyl propionate and (B2) from 0 to about 30% by weight of a further ethylenically unsaturated monomer in the presence of (A); wherein the composition further comprises from about 0.01% to about 10% by weight of the composition of an alkoxylated polyethyleneimine polymer comprising a polyethyleneimine backbone having from about 400 to about 10,000 weight average molecular weight and the alkoxylated polyethyleneimine polymer further comprises: (1) one or two alkoxylation modifications per nitrogen atom of the polyethyleneimine backbone by a polyalkoxylene chain having an average of about 1 to about 30 alkoxy moieties per modification, wherein the terminal alkoxy moiety of the alkoxylation modification is capped with hydrogen, a C 1 -C 4 alkyl or mixtures thereof; (2) a substitution of one C 1 -C 4 alkyl moiety or a benzyl moiety and one or two alkoxylation modifications per nitrogen atom of the polyethyleneimine backbone by a polyalkoxylene chain having an average of about 1 to about 40 alkoxy moieties per modification wherein the terminal alkoxy moiety is capped with hydrogen, a C 1 -C 4 alkyl or mixtures thereof; or (3) a combination thereof.