C - Chemistry – Metallurgy – 11 – D
Patent
C - Chemistry, Metallurgy
11
D
134/16
C11D 1/00 (2006.01) C11D 3/00 (2006.01) C11D 7/00 (2006.01)
Patent
CA 1044107
METHOD OF CLEANING GLASS WINDOWS AND MIRRORS Abstract of the Disclosure Glass surfaces having undesirable foreign substances thereon are cleaned with an aqueous cleaning composition containing water and a catalytically effective amount of a novel catalyst. The invention is especially effective in cleaning glass windows and mirrors, and glass surfaces in general where it is important that the cleaned glass not have a film or residue thereon. In practicing the method, the aqueous cleaning composition containing water and the catalyst is applied to the glass surface and intimately contacted therewith until the foreign substances may be removed by a wiping action. Thereafter, the glass surface is wiped to remove the foreign substances and any excess aqueous cleaning composition without leaving a film or residue on the clean glass surface. When desirable, the aqueous cleaning composition may also contain a surface active agent or a combination of a surface active agent and a water softening agent. The novel catalyst which is used in preparing the aqueous cleaning composition is prepared by steps including admixing a water soluble alkali metal silicate with an aqueous medium containing carefully controlled amounts of dissolved water soluble substances which are sources of calcium ion and magnesium ion, reacting the same to produce an aqueous finely divided or colloidal suspension of the reaction product, admixing a micelle-forming surfactant with the aqueous medium, and agitating the aqueous medium containing the finely divided or colloidal particles and surfactant to form catalyst containing micelles.
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