Vinyl-ester polymeric timing layer for color transfer assemblages
US4440848A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1983 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Jan 31, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F218/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Photographic assemblages, elements, receiving elements and cover sheets are described employing a novel timing layer comprising the following recurring units: ##STR1## wherein R.sup.1 is a straight or branched chain alkyl group of from 1 to about 10 carbon atoms or aralkyl group of from about 7 to about 10 carbon atoms; PA0 R.sup.2 is a substituted or unsubstituted aryl group of from 6 to about 12 carbon atoms; PA0 R.sup.3 is a straight or branched aliphatic group having from 1 to about 20 carbon atoms or an aromatic group having from about 6 to about 20 carbon atoms, the group being substituted with at least one free carboxylic acid group, free sulfonic acid group, free phosphoric acid group or salt thereof; PA0 x is from about 1 to about 30 weight percent; and PA0 y+z is from about 99 to about 70 weight percent, the ratio of y:z ranging from about 15:85 to about 70:30. The timing layer has a high activation energy and provides improved processing temperature latitude.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.