Photographic polymeric composition containing a leuco dye cyanide
US4006023A · kind A · utility
14Cited by
4References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1974 |
| Grant date | Feb 1, 1977 |
| Priority date | — |
| Expiry date | Oct 7, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A hard, clear, glassy, smooth polymer with a dry surface having a dye precursor therein which forms a permanent color at those areas of the solid polymer that have been irradiated with ultra-violet or ionizing radiation is formed by combining vinyl and/or acrylic monomers, a triphenylmethane cyanide dye precursor and a chemical initiator that is compatible with the dye cyanide and polymerizing in the presence of a slight excess of hydrogen ions in an inert atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.