Polymerizable polyol (allyl carbonate) composition
US5973093A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1996 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Nov 27, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/163
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Describes polymerizable organic compositions of a major amount of a first monomer component which is a polyol(allyl carbonate), e.g., diethylene glycol bis(allyl carbonate), and from about 2 to 35 weight percent of a second monomer component which is an alkoxylated bisphenol (or hydrogenated bisphenol) having acrylate or methacrylate groups, e.g., dimethacrylate of bisphenol A having 25 to 35 ethoxy units. Substantially completely cured polymerizates prepared from such compositions may be used to prepare photochromic articles, e.g., lenses, by incorporating a photochromic substance, e.g., by thermal transfer, into the polymerizate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.