Foams of silicates and poly(meth)acrylic acids
US4464486A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1983 |
| Grant date | Aug 7, 1984 |
| Priority date | — |
| Expiry date | Jul 20, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B28/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Inorganic-organic foams are obtained by foaming a mixture of PA1 (a) a 5 to 60% by weight aqueous alkali metal silicate or ammonium silicate solution, PA1 (b) a sufficient amount of a conventional hardener for aqueous silicate solutions, PA1 (c) a polymer of (meth)acrylic acid or a copolymer of acrylic acid and methacrylic acid or of (meth)acrylic acid and a copolymerizable monomer containing ethylinic double bonds, the polymer and copolymer being soluble in the aqueous silicate solution, some or all the carboxyl groups of the polymer or copolymer, where relevant, being neutralized by a base and the amount of polymer or copolymer being 0.1 to 30 parts per 100 parts of SiO.sub.2 contained in the aqueous silicate solution, PA1 (d) a blowing agent, PA1 (e) a surfactant having a foaming action and, where relevant, PA1 (f) gelling agent for solidifying the foam before hardening and/or conventional fillers, and allowing the foam to harden. The foams can be used as insulating materials in the construction industry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.