Patent ID: 6333299
Filing Date: 2001-12-25
Classification: C11D

Abstract:
A liquid acidic composition suitable for removing limescale-containing stains from a hard-surface, wherein said composition has a pH less than 4, comprising from 0.1% to 70% by weight of an acid, from 0.001% to 20% by weight of the total composition of a polysaccharide polymer selected from the group consisting of a substituted cellulose material, succinoglycan, guar gum, locust bean gum, tragacanth gum, and mixtures thereof and from 0.001% to 20% by weight of the total composition of a vinylpyrrolidone homopolymer or copolymer wherein said vinylpyrolidone copolymer is a copolymer of N-vinylpyrrolifone and an alkylenically unsaturated monomer selected from the group consisting of maleic acid, chloromaleic acid, fumaric acid, itaconic acid, citraconic acid, phenylmaleic acid, aconitic acid, acrylic acid, N-vinylimidazole, vinyl acetate and anhydrides thereof, styrene, sulphonated styrene, alpha-methyl styrene, vinyl styrene, t-butyl styrene and mixtures thereof; or said vinylpyrrolidone copolymer is a quaternized or unquaternized vinylpyrrolidone/dialkylaiinoalkyl acrylate or methacrylate copolymer having the following formula: ##STR7##in which n is between about 20 and about 99; m is between about 1 and about 80; R1 represents H or CH.sub.3 ; y denotes 0 or 1; R.sub.2 is --CH.sub.2 --CHOH--CH.sub.2 -- or C.sub.x H.sub.2x, in which x is from 2 to 18; R.sub.3 represents a lower alkyl group of from about 1 to about 4 carbon atoms or ##STR8##R4 denotes a lower alkyl group of from about 1 to about 4 carbon atoms; X-- is chosen from the group consisting of Cl, Br, I, 1/2SO.sub.4, HSO.sub.4, CH.sub.3 SO.sub.3 ; or mixtures of said hompolymer and copolymer, said composition being packaged in a spray dispenser.