Process for production of photochromic cured product
US5910516A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1997 |
| Grant date | Jun 8, 1999 |
| Priority date | — |
| Expiry date | Jan 23, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S522/91
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photochromic cured product is produced by subjecting a photopolymerizable composition containing PA1 (A) a radical-polymerizable monomer, PA1 (B) an ultraviolet polymerization initiator having the main absorption in an ultraviolet region and a molar extinction coefficient at 400 nm of 150 lit./(mol.multidot.cm) or more, and PA1 (C) a photochromic compound, to an irradiation with an active energy ray having, as the main spectrum, an emission spectrum of 400 nm or more, to cure the composition, whereby the polymerization can be performed easily in a short time and a cured product having an excellent photochromic property can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.