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US 7,745,383 B2Granted
Method for cleaning hard surfaces using a composition comprising a colloidal silica sol
AssigneeHenkel AG & Co. KGaA
InventorsMichael Dreja, Juergen Noglich, Bernhard Guckenbiehl
Life of this patent
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Abstract
Cleaner for hard surfaces, especially glass. Application of the cleaner containing a colloidal silica sol results in a modification of the streaming potential of the surface by −5 to −50 mV. The cleaner can be used to hydrophilize and clean hard surfaces by contact.
Claims18
A method of cleaning a hard surface comprising the steps of contacting a hard surface in need of cleaning with a cleaning-effective amount of a composition comprising:
- (a) an anionic surfactant selected from the group consisting of C8-18 alkylbenzenesulfonates, C8-20 alkanesulfonates, C8-18 fatty alcohol sulfates, C8-18 alkyl polyglycol ether sulfates, mono- and di-C8-18 alkyl sulfosuccinates, and any salts and/or mixtures thereof;
- (b) a nonionic surfactant selected from the group consisting of C8-18 alcohol polyglycol ethers, C8-18 carboxylic acid polyglycol esters, ethoxylated fatty acid amides, C14-20 amine oxides, alkylpolyglycosides, and any mixtures thereof;
- (c) a colloidal silica sol comprised of hydrophilicizing particles that produces a change in streaming potential of a hard surface treated therewith of −5 to −50 mV relative to the untreated surface;
- and
- (d) at least one volatile alkali selected from the group consisting of ammonia, alkanolamines having up to 9 carbon atoms, and mixtures thereof wherein the viscosity of the cleaning composition is from 0.1 to 200 mPa.s.
2 more elements
Dependencies are inferred from the claim text.