The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 1983
Filed:
Feb. 18, 1982
Henkel Kommanditgesellschaft auf Aktien, Dusseldorf-Holthausen, DE;
Abstract
An adhesive composition based upon an aqueous solution of alkali metal silicate with a content of powdered inorganic filler, having good storage stability, which comprises an aqueous alkali metal silicate solution containing: (a) from 10% to 40% by weight of at least one powdered inorganic filler, (b) a suspension effective amount of at least one zinc soap of a fatty acid having from 12 to 22 carbon atoms and (c) from 0 to about 24% by weight of a 50% by weight stable, aqueous dispersion of an alkali-resistant organic polymer, based on the weight of the total composition. Preferably zinc stearate in amounts of from 1% to 5% by weight are added to the adhesives containing powdered inorganic fillers and optionally organic additives on a base of aqueous water glass solutions, to prevent separation phenomena. Sodium and/or potassium silicate solutions can be used, the sodium silicate solution being preferably present in the ratio by weight of 3.3 to 3.9:1 for SiO.sub.2 /Na.sub.2 O, with a solids content of 38% to 28% by weight and the potassium silicate solution at a ratio by weight of 2 to 2.6:1 for SiO.sub.2 /K.sub.2 O, with a solids content of 40% to 29% by weight. The inorganic filler is preferably powdered crystalline calcium carbonate in the form of metamorphous calcite with particle sizes of up to 25 .mu.m.