Perfluorinated stripping agents for diffusion transfer assemblages
US4459346A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1983 |
| Grant date | Jul 10, 1984 |
| Priority date | — |
| Expiry date | Mar 25, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/52
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Photographic assemblages and processes are described wherein a certain stripping agent is employed to enable an image-receiving layer to be separated from the rest of the assemblage after processing. The stripping agent comprises a straight chain alkyl or polyethylene oxide perfluoroalkylated ester or perfluoroalkylated ether, and preferably has the following formula: ##STR1## wherein R.sup.1 is an alkyl or substituted alkyl group having from 1 to about 6 carbon atoms or an aryl or substituted aryl group having from about 6 to about 10 carbon atoms; ##STR2## R.sup.3 is H or R.sup.1 ; n is an integer of from about 4 to about 20; and PA1 x and y each independently represents an integer of from about 2 to about 50, and PA1 z represents an integer of from 1 to about 50. Less bulky black-and-white or color prints or transparencies can thereby be obtained from integral assemblages. Materials from the discarded layers may also be recycled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.