One-component optical resin composition
US5942158A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1998 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Mar 9, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/807
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Described is a polymerizable organic composition comprising at least one capped polyisocyanate having nonfugitive capping groups, e.g., a 1H-azole, a polythiol having two or more thiol groups, and optionally a reactive hydrogen compound selected from polyols, compounds having both hydroxy and thiol groups, and mixtures thereof. A polymerizate, having a thickness of at least 0.5 millimeters, e.g., an optical lens, obtained from the composition of the present invention has an initial Barcol hardness of at least 1, a refractive index of at least 1.57 and an Abbe number of at least 33. Also described are photochromic articles prepared from such polymerizates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.