Diffusion transfer photographic materials comprising polyvinyl e

Details Diffusion transfer photographic materials comprising polyvinyl e Diffusion transfer photographic materials comprising polyvinyl e

1977-06-22

1979-04-17

Schilling, Richard L.

Gas separation: apparatus

Electric field separation apparatus

Plural diverse electric fields

96 3, 96 29D, 96 77, 96119R, 428500, 428522, G03C 554, G03C 700, G03C 140, G03C 148

Patent

active

041498917

ABSTRACT:
An improved neutralization layer is disclosed for a diffusion transfer photographic material wherein said layer contains a copolymer having a monomer unit represented by the formula ##STR1## wherein A is a divalent radical selected from the group consisting of an alkylene group, an arylene group and a combination group consisting of at least one alkylene group and at least one arylene group; the alkylene group containing two or more carbon atoms; the alkylene group, the arylene group and the combination group containing at least one --COOR and/or at least one ##STR2## in which R is hydrogen or an alkyl group.

REFERENCES:
patent: 2373782 (1945-04-01), Scheiderbauer
patent: 3880658 (1975-04-01), Lestina et al.

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