Multilayer photographic elements having improved coating quality

Details Multilayer photographic elements having improved coating quality Multilayer photographic elements having improved coating quality

1990-09-19

1991-08-06

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified backing or protective layer containing

430523, 430531, 430537, 430961, G03C 176

Patent

active

050377299

ABSTRACT:
A multilayer photographic element comprising at least one light-sensitive emulsion layer comprising silver halide grains dispersed in a hydrophilic colloid and at least one auxiliary hydrophilic colloid layer, said plurality of layers of different composition being simultaneously coated onto a hydrophobic support from aqueous hydrophilic colloid compositions, presents improved coating quality if at least one auxiliary hydrophilic colloid layer comprises a) an anionic surface active agent, b) at least one of betaine, N-oxide or amide surface active agent the and c) at least one of dispersed droplets of a water-immiscible high-boiling organic solvent, a vinyl addition polymer latex or a highly deionized gelatin.
All the layers can be simultaneously coated from said different hydrophilic colloid aqueous compositions while maintaining a distinct layer relationship and avoiding any coating defects.

REFERENCES:
patent: 4146398 (1979-03-01), Arase et al.
patent: 4495273 (1985-01-01), Pannocchia et al.
patent: 4513080 (1985-04-01), Helling
patent: 4840881 (1989-06-01), Watanabe et al.
patent: 4891308 (1990-01-01), Cho

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