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Fabric Color Maintenance Product Patented by P&G



Published July 2, 2014
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US Patent No. 8,728,172 B2; The Procter & Gamble Company has patented a method of delivering a color maintenance and/or rejuvenation benefit to fabric. It entails a fabric care additive composition having an acidic pH comprising, based on total composition weight, from about 5% to about 20% of a cationic polymer, said fabric care additive composition further comprising a cationic surfactant, wherein said cationic polymer has a charge density of from about 0.05 meq/g to about 25 meq/g at a pH of from about 2 to about 11 and said cationic polymer is a polymer selected from the group consisting of alkylamine epichlorohydrin polymers, homopolymers of diallyldimethyl ammonium chloride, copolymers of diallyldimethyl ammonium chloride, and combinations thereof, in the presence of water in a washing machine with a conventional detergent as a source of anionic surfactant to form a mixture having an ACD:CCD ratio of from about 2:1 to about 0.1:1. The method entails washing the fabric, contacting it with the mixture, rinsing it and applying one or more finishing treatments selected from the group consisting of drying, pressing, starching, perfuming, and combinations thereof.


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