Hydrolyzable diffusion control layers in photographic products

Details Hydrolyzable diffusion control layers in photographic products Hydrolyzable diffusion control layers in photographic products

1985-02-21

1985-10-15

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Transfer procedure between image and image layer, image...

Diffusion transfer process, element, or identified image...

430227, 430505, 430536, 430955, G03C 140, G03C 554, G03C 720

Patent

active

045474516

ABSTRACT:
Photographic diffusion transfer film units including polymeric diffusion control layers are disclosed. The diffusion control layers comprise polymers which are hydrolyzable in an alkaline medium so as to convert a layer comprising one or more of the polymers from a condition of impermeability to alkali or materials soluble in or solubilized by an aqueous alkaline processing composition to a condition of substantial permeability thereto.

REFERENCES:
patent: 3925083 (1975-12-01), Fitzgerald
patent: 4120727 (1978-10-01), Fitzgerald
patent: 4288523 (1981-09-01), Taylor
patent: 4297431 (1981-10-01), Sullivan
patent: 4323644 (1982-04-01), Nakamura et al.
Haas et al., J. of Polymer Science, vol. XXXVII, issue 131, pp. 317-319, 1959.
Schaetzle et al., Helvetica Chimica Acta, 46, pp. 2418-2424, translation, pp. 1-8, 1963.
Yonezawa, Yuki Gosei Kagaku Hyokaishi, 27(12), 1969, pp. 1218-1223, translation, pp. 1-9.

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