Photochromic curable composition
US5776376A · kind A · utility
46Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1997 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Jan 23, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/325
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A photochromic curable composition obtained by adding (E) an .alpha.-methylstyrene dimer and (F) a photochromic compound to polymerizable monomers comprising (A) a compound having at least one epoxy group in the molecule, such as glycidyl methacrylate or the like, (B) a polypropylene glycol di(meth)acrylate monomer, (C) a polyethylene glycol di(meth)acrylate monomer and (D) a (meth)acrylate monomer and/or a styryl monomer. This composition is superior in moldability when cured and gives a cured product of excellent durability in photochromism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.