Storage-stable aqueous alkali metal silicate/filler adhesive compositions and their use
US4403059A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1982 |
| Grant date | Sep 6, 1983 |
| Priority date | — |
| Expiry date | Feb 18, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/00482
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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 fil…
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