Cyclic dihydrogenpolysiloxanes, hydrogenpolysiloxanes, processes for their production, silica type glass moldings and a process for their production, optical elements and a process for their production
US8097690B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2006 |
| Grant date | Jan 17, 2012 |
| Priority date | — |
| Expiry date | Jul 16, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2218/11
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Cyclic dihydrogenpolysiloxanes, hydrogenpolysiloxanes of specific siloxane unit formulas etc., a process for their production using hydrolysis/condensation, a process for the production of silica type glass moldings with an optical transmittance of 90% to 100% in the vacuum-UV region to UV region and an optical transmittance of 98% to 100% in the visible region to near infrared region by curing said cyclic dihydrogensiloxanes or said hydrogenpolysiloxanes in a mold, said silica type glass moldings, optical elements made up of the silica type glass, a process for the production of optical elements having such a silica type glass film layer by coating an optical element with the hydrogenpolysiloxanes and curing them, and optical elements having such a silica type glass film layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.