Thermosetting silicone resins
US5614603A · kind A · utility
10Cited by
7References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1996 |
| Grant date | Mar 25, 1997 |
| Priority date | — |
| Expiry date | Jan 31, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The introduction of a highly spin-coatable silicone resin that does not produce large amounts of volatiles during its cure, and that is a precursor to highly heat-resistant, optically transparent cured products that exhibit an excellent hardness. The silicone resin comprises a silicone polymer of the general formula: EQU (Ph.sub.2 SiO).sub.a (HSiO.sub.3/2).sub.b (R.sup.1 SiO.sub.3/2).sub.c in which R.sup.1 is hydrogen or C.sub.1 to C.sub.8 hydrocarbon group, possibly containing a heteroatom, Ph is a phenyl group and 6.ltoreq.a+b+c.ltoreq.1,000, 0.6>a/(a+b+c).gtoreq.0.4, and 1.0.gtoreq.b/(b+c).gtoreq.0.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.