Patent ID: 8188029

Claim:
A cleaning article consisting of a foamed hydrophilic polyurethane composition, and at least one layer of a fibrous substrate, wherein said foamed hydrophilic polyurethane composition is formed by a process which comprises the process steps of: providing in the process a reaction mixture consisting of one or more polyurethane prepolymer, a quaternary ammonium compound having germicidal properties according to the structural formula: wherein R 2 and R 3 are the same or different C 8 -C 12 alkyl, or R 2 is C 12-16 alkyl, C 8-18 alkylethoxy, C 8-18 alkylphenolethoxy and R 3 is benzyl, and X is a halide, saccharinate or methosulfate counterion, a polyethylene/polypropylene block copolymer nonionic surfactant having an avg. molecular weight of 11400, one or more further nonionic surfactants, one or more glycol ethers, one or more bulking agents based on inorganic oxides or inorganic silicates, and optionally one or more of: silicone oil, fragrance, coloring agent, organic acid, inorganic acid, zwitterionic surfactant, amphoteric surfactant, silane based coupling agent, organic solvent other than glycol ether, and rubber, and subsequently forming the foamed hydrophilic polyurethane composition, from the reaction mixture, wherein the resultant foamed polyurethane composition is characterized in that, following at least fifty (50) rinse/squeeze cycles an elution of at least about 100 parts per million of germicidal quaternary ammonium compounds in the fluid squeezed or wrung from the article.