Patent · US Active

Sulfur modified silanes for the elaboration of high refractive index materials

US8063237B2 · kind B2 · utility

2Cited by

3References

20Claims

0Family size

Assignee

Essilor International (Compagnie Generale d'Optique) · FR

Inventors

John Biteau · Dallas, US
Herbert Mosse · St. Petersburg, US

Key dates

Filing date	Dec 1, 2010
Grant date	Nov 22, 2011
Priority date	—
Expiry date	Dec 1, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L81/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for combining a polythiol reactant and an alkenyl silane reactant to form a polysulfide polysilane. The reactants are combined in a thiol-ene addition process driven by UV radiation. The polysulfide polysilane is then hydrolyzed and may be combined with other hydrolyzed compounds. For coatings, the polysulfide polysilane is hydrolyzed and may optionally be combined with nanoparticles. For bulk materials, the polysulfide polysilane is hydrolyzed, concentrated, and heated to form a high refractive index material which can be used to form optical articles such as lenses.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.