Silicone foam masses
US4888217A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 14, 1989 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Apr 14, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2383/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The specification describes and claims a method of producing a foamed mass having a density of less than 150 kg/m.sup.3 adherent to surfaces of a cavity which comprises inserting into the cavity a foamable composition formed by mixing impinging jets of two or more parts of a foamable silicone composition capable of curing at 20.degree. C. within 2 minutes to provide a foamed mass having a density of less than 150 kg/m.sup.3. The Compositions comprises (a) one or more polysiloxanes having not less than three alkylhydrogensiloxane units per molecular, (b) one or more polysiloxanes having not less than two silicon-bonded hydroxyl groups per molecule, (c) one or more compounds having carbon-bonded hydroxyl groups present in a proportion to provide from 0 to 2% by weight of the composition, (d) a polyorganosiloxane compriing [F(CF.sub.2).sub.m (CH.sub.2).sub.n O].sub.p SiO.sub.4-p/2, R.sub.3 SiO.sub.1/2 and SiO.sub.4/2 units and silicon-bonded hydroxyl groups wherein each R represents a monovalent hydrocarbon group containing from 1 to 20 carbon atoms, m is an integer having an average value from 1 to 20, n has the value 1 or 2, p has the value 1, 2 or 3 and (e) a platinum catalyst for …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.