Coating mass for the back of photographic support materials

Details Coating mass for the back of photographic support materials Coating mass for the back of photographic support materials

1991-01-25

1993-08-03

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified backing or protective layer containing

430523, 430527, G03C 185

Patent

active

052328244

ABSTRACT:
A coating mass for the production of a layer on the reverse side of photographic support materials of plastic foils or plastic coated papers is particularly distinguished by extraordinarily low dirt absorption and discoloration, even from greatly aged development baths. This is obtained through a mixture of colloidal aluminum modified silica, the alkali salt of an organic polyacid, a styrene/butadiene latex with a low content of free carboxyl groups and residual monomers, and a surface tension of >45 dyn/cm. The coating mass is so composed that the dried back coating has an interfacial surface tension of >50 dyn/cm.

REFERENCES:
patent: 4908155 (1990-03-01), Leemans et al.
patent: 5045394 (1991-09-01), Saverin et al.
Patent Abstract of Japan, vol. 12, No. 422 (P-783) [3269] Nov. 9, 1988, JP-A-63-157149 Oji Paper Co. Ltd. Jun. 30, 1988.

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