Patent · US Active

Sulfur modified silanes for the elaboration of high refractive index materials

US7867577B2 · kind B2 · utility

4Cited by

2References

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	May 15, 2008
Grant date	Jan 11, 2011
Priority date	—
Expiry date	Aug 15, 2028

Classification

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

Abstract

A composition having a polythiol reactant and an alkenyl silane reactant which are combined to form a polysulfide polysilane. In the process, 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 lenses.

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