Heat-curable silicone rubber composition and cured product thereof
US5312860A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1992 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Sep 10, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/70
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a heat-curable silicone rubber composition to be cured by hydrosilation reactions and having outstanding physical properties, especially a high tear strength, said composition comprising PA0 (A) a polydiorganosiloxane having at least two unsaturated aliphatic hydrocarbon groups and represented by the general formula (1): EQU R.sub.a.sup.1 SiO.sub.(4-a)/2 ( 1) PA0 wherein R.sup.1 represents a substituted or unsubstituted monovalent hydrocarbon group containing 0.01 to 15 mole % of an unsaturated aliphatic hydrocarbon group, a is a positive number of from 1.95 to 2.05. PA0 (B) a polyorganohydrogensiloxane having at least three hydrogen atoms directly bonded to silicon atom in a molecule, PA0 (C) silica filler having a specific surface area of at least 50 m.sup.2 /g, and PA0 (D) an addition reaction catalyst, PA0 (E) water, and preferably PA0 (F) an organosilane represented by the general formula: EQU R.sub.m.sup.2 Si(OR).sub.4-m PA0 wherein R.sup.2 represents a substituted or unsubstituted monovalent hydrocarbon group, R represents a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, and m is 0, 1 or 2, or a polysil…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.