Optical silica-containing polysiloxane resin
US5905108A · kind A · utility
3Cited by
2References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1998 |
| Grant date | May 18, 1999 |
| Priority date | — |
| Expiry date | Mar 18, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/36
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An optical silica-containing polysiloxane resin comprises colloidal silica and a polysiloxane resin. The polysiloxane resin has the formula RSiO.sub.3/2, where R is selected from the group consisting of hydrocarbon groups of 1 to 4 carbon atoms and fluorohydrocarbon groups of 3 to 10 carbon atoms. The fluorohydrocarbon groups have the general formula C.sub.n F.sub.(2n+1) C.sub.2 H.sub.4 --, where n is an integer of 1 to 8. The optical silica-containing polysiloxane resin has high light transmissivity and high surface hardness, and can be used for optical elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.