Photochromic epoxy resin coating composition and articles having such a coating
US6268055A · kind A · utility
116Cited by
23References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1998 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Nov 6, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31511
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Described are photochromic epoxy resin coatings that meet commercially acceptable "cosmetic" standards for optical coatings. Also described are articles having such coatings. The coatings exhibit a Fischer microhardness of from 50 to 150 Newtons per mm.sup.2 and desirable photochromic properties, i.e., the formation of darker activated colors and faster rates of photochromic activation and fade when irradiated with ultraviolet light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.