Barrier layer between reactants in photographic products compris

Details Barrier layer between reactants in photographic products compris Barrier layer between reactants in photographic products compris

1980-08-04

1982-03-02

Lieberman, Paul

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525185, 525190, C08F 816

Patent

active

043178928

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.

REFERENCES:
patent: 3626031 (1971-12-01), Chambers
patent: 4056394 (1977-11-01), Hannie
patent: 4061496 (1977-12-01), Hannie
Research Disclosure: "Neutralizing Materials in Photographic Elements", #12331, vol. 123, 7/1974, pp. 22-24.

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