Carpet cleaning composition
OwnerJames A. Smith, Betty J. Murphyinventors
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Abstract
A dry-type carpet cleaning composition is disclosed which comprises shreds of a hydrophilic polyurethane foam which incorporates abrasive particles surfactants, and adjuvants such as fragrance, solvents, anti-static agents and fiber emollients. The foam shreds are effective to clean both wet and dry carpeting since they are highly water-absorbent and can be readily removed from the carpet surface when wet.
Claims22
A water absorbent carpet cleaning composition comprising shreds of a hydrophilic, polyurethane foam having substantially closed cells, wherein the walls of said cells incorporate abrasive particles and an aqueous phase, and wherein said shreds are obtained from a friable foam bun having a tensile strength of less than about 10 psi.
A water absorbent carpet cleaning composition prepared by a process comprising:
- (a) foaming an aqueous reactant phase comprising about 45-70% of abrasive solid particles, about 0.1-5% by weight of a clay suspending agent, about 0.1-10% of a nonionic surfactant about 0.05-10% of a cationic amine anti-static agent, about 1-10% silicone fluid and about 15-65% water;
- (b) mixing said aqueous reactant phase with a water-foamable prepolymer resin which contains at least 2 free isocyanate groups per resin molecule so that the final mole ratio of water to total free isocyanate groups is within the range of about 5-100:1, thereby converting said resin into a hydrophilic, polyurethane foam bun;
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- (c) shredding said foam bun.
A water absorbent carpet cleaning composition prepared by a process comprising:
- (a) forming an aqueous reactant phase comprising about 20-55% by weight of water, about 0.1-10% of a nonionic surfactant, about 0.1-5% by weight of a cationic amine anti-static agent, about 1-10% by weight of a polysiloxane silicone fluid, about 1-15% of an organic solvent, about 25-60% of abrasive mineral particles, about 0.1-5% of a clay suspending agent, and about 0.01-10% fragrance;
- (b) mixing said aqueous reactant phase with a water-foamable prepolymer resin in a weight ratio of aqueous phase to prepolymer of about 20-1:1, said prepolymer resin comprising a toluene diisocyanate-capped polyalkoxylene ether polyol having a molecular weight within the range of about 1300-1400 and comprising about 1.5-2.5 mEq/g of isocyanate groups, so as to convert such resin into a hydrophilic, friable polyurethane foam bun having a tensile strength of less than about 8 psi;
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- (c) shredding said bun into foam shreds having a free-flow density of about 0.15-0.25 g/cc.
Dependencies are inferred from the claim text.