Elastomeric silicone sponge
US4391921A · kind A · utility
15Cited by
9References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1982 |
| Grant date | Jul 5, 1983 |
| Priority date | — |
| Expiry date | Jun 25, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2383/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of producing silicone elastomeric sponge is disclosed. The method comprises freezing an aqueous silicone emulsion, then thawing and drying to produce a silicone sponge containing irregular closed cells. The aqueous silicone emulsion comprises water, an anionically stabilized hydroxyl endblocked polydiorganosiloxane, an organic tin compound, and a colloidal silica, the emulsion having a pH of from 9 to 11.5 inclusive. The sponge produced by the method is useful as insulation and gasketing at high and low temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.