Polymeric couplers for heat image separation systems
US5354642A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1992 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Aug 10, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/4066
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process is disclosed for forming a dye image including the steps of: PA1 exposing a photographic element comprising a support bearing a light sensitive silver halide emulsion layer containing a polymeric color coupler compound capable of forming a heat transferable dye upon development, wherein the polymeric color coupler compound is of the formula: EQU COUP-L-B PA1 wherein COUP represents a coupler moiety capable of forming a heat transferable dye upon reaction of the moiety with an oxidation product of a color developer; L is a divalent linking group which is separated from COUP upon reaction of the coupler moiety with said oxidation product of a color developer; and B represents the polymeric backbone; PA1 developing said exposed element with a color developer solution to form a heat transferable dye image; PA1 heating said exposed, developed element to thereby transfer the dye image from the emulsion layer to a dye receiving layer, where said receiving layer is part of the photographic element or part of a separate dye receiving element brought into contact with the photographic element; and PA1 separating the emulsion layer from the dye receiving layer containing the transfe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.