Use of carbon adsorption deactivating compounds in image transfer elements
US4450222A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1982 |
| Grant date | May 22, 1984 |
| Priority date | — |
| Expiry date | Dec 20, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/54
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Image transfer photographic elements, assemblages, processes and compositions are described which employ carbon black in an opaque layer and/or alkaline processing composition, the carbon black having a deactivating compound adsorbed thereto so that dye image-providing material can diffuse through the opaque layer and/or processing composition without any substantial adsorption thereof to the carbon black, the deactivating compound being incapable of releasing any dye moiety therefrom. In a preferred embodiment, the deactivating compound has the following formula: ##STR1## wherein: (a) Ballast is an organic ballasting radical; PA0 (b) Z is ##STR2## or is part of Y; (c) G is OR.sup.1 or NHR.sup.2 wherein R.sup.1 is hydrogen or a hydrolyzable moiety and R.sup.2 is hydrogen or a substituted or unsubstituted alkyl group of 1 to about 22 carbon atoms; PA0 (d) Y represents the atoms necessary to complete a benzene nucleus, a naphthalene nucleus or a 5- to 7-membered heterocyclic ring; PA0 (e) X is a moiety which is adsorbed to the carbon black and thus retards adsorption thereto of the dye image-providing material; PA0 (f) J is a bivalent linking group which is non-cleavable by oxidation…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.