Barrier layer between reactants in photographic products comprising a mixture of vinylidene chloride terpolymer and polymeric carboxy-ester-lactone
US4317892A · kind A · utility
6Cited by
3References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1980 |
| Grant date | Mar 2, 1982 |
| Priority date | — |
| Expiry date | Aug 4, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L37/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition comprising a mixture of (1) from 5 to 95 percent by weight of a copolymer comprising from 55 to 85 percent by weight of vinylidene chloride, 5 to 35 percent by weight of an ethylenically unsaturated monomer, and 0 to 20 percent by weight of an ethylenically unsaturated carboxylic acid, and (2) from 5 to 95 percent by weight of a polymeric carboxy-ester-lactone, is useful as a temporary barrier between reactants in photographic products. The barrier is particularly useful as a process timing layer in color image transfer film units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.