Heat-curable fluorosilicone rubber composition and cured product thereof
US5264522A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1992 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Sep 10, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L83/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a heat-curable fluorosilicone rubber composition to be cured by hydrosilation reactions and having outstanding physical properties, especially improved transparency and processability, 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 atoms in a molecule and represented by the general formula: ##STR1## wherein R.sup.2, R.sup.3 and R.sup.4 independently represents a substituted or unsubstituted monovalent hydrocarbon group, X represents CF.sub.2 or C.sub.3 F.sub.6 O, b is equal to 2 or 3, c is equal to 1 or 2, b+c=3, m is an integer of 2 or more, n is an integer of 1 or more, and k is an integer of 2 or more, PA0 (C) a silica filler having a specific surface area of at least 50 m.sup.2 /g, and P…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.