Process for production of photochromic cured product
US5879591A · kind A · utility
13Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1997 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Jan 24, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/685
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing a photochromic cured product by allowing an unpurified, impurities-containing polyfunctional (meth)acrylate monomer such as unpurified polyalkylene glycol dimethacrylate and a photochromic spirooxazine compound to contain a compound having at least one epoxy group in the molecule such as glycidyl methacrylate and then polymerizing the resulting composition. The process can provide a spirooxazine-based photochromic cured product which hardy undergoes initial coloring and is superior in initial color-developing performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.