Radiation process for producing colored photopolymer systems
US3954468A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1974 |
| Grant date | May 4, 1976 |
| Priority date | — |
| Expiry date | Aug 27, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/168
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A colored image in a polymer binder is obtained by polymerization of a mixture comprising (1) at least one polymerizable monomer, (2) a halogen containing activator (free radical source), (3) a binder, and (4) at least one normally bleachable dye, dissolved in said mixture; the polymerization being accomplished by imagewise exposure of said composition to a suitable dose of radiation, and is accompanied by fixing of the dye to the photopolymer. As a consequence, the dyes lose their bleaching characteristic and when the exposed areas are developed with a strong acid such as one which would normally bleach the dye, the dye is leached from only the unexposed areas. If the developer also includes an aliphatic alcohol, the unexposed areas may be removed, leaving a relief image with color in the raised portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.