Organosiloxane gels
US4072635A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1975 |
| Grant date | Feb 7, 1978 |
| Priority date | — |
| Expiry date | Jun 6, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2483/05
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An organosiloxane gel is made by reacting (1) an organosiloxane having a viscosity of from 10 to 10,000 centistokes at 25.degree. C. and being a copolymer consisting essentially of units of the formula R.sub.2 ViSiO.sub.0.5, RViSiO, R.sub.2 SiO and MeR.sub.2 SiO.sub.0.5, where each R is individually selected from the group consisting of methyl and phenyl radicals, Vi represents a vinyl radical and Me represents a methyl radical, at least 0.50 molar percent of the units in said copolymer being R.sub.2 ViSiO.sub.0.5 units and RViSiO units where the terminal groups are at least 50 mole percent of R.sub.2 ViSiO.sub.0.5 units and may have as the rest of the total terminal units MeR.sub.2 SiO.sub.0.5 units, (2) a liquid hydrogen siloxane of the average general formula XRMeSIO(R.sub. 2 SiO).sub.n (RHSiO).sub.m SiMeRX, where each R is as above defined and X is selected from the group consisting of H and R and n and m have such average values that the viscosity of the hydrogen siloxane is no more than 10,000 centistokes at 25.degree. C. and m is at least 1, no more than 25 molar percent of the total R radicals present in (1) and (2) being phenyl and (3) a platinum or platinum compound catal…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.