Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1983-03-02
1985-04-09
Brammer, Jack P.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430628, 430631, G03C 172
Patent
active
045102384
ABSTRACT:
Photographic material containing on a support at least one silver halide emulsion layer which contains as binders both gelatin and a polymer latex, wherein the particle size is less than 0.05 .mu.m, and which is obtained by emulsion polymerizing a monomer or monomer mixture which consists of an alkyl acrylate or an alkyl methacrylate or a monomer mixture comprising both an alkyl acrylate and an alkyl methacrylate or a mixture comprising an alkyl acrylate and/or an alkyl methacrylate together with up to 5% by weight of an ethylenically unsaturated copolymerizable acid and/or up to 30% by weight of other ethylenically unsaturated comonomers in the presence of at least 12% by weight of the monomers present of an anionic surfactant at a temperature of from 15.degree. C. to 90.degree. C. by use of a redox initiator system which is present to the extent of from 0.1% to 3% by weight of the monomers present.
The latexes are of use to partially replace gelatin in photographic materials. These latex/gelatin binders are suitable for highspeed coating and drying processes and confer to the photographic materials an increased dimensional stability.
REFERENCES:
patent: 3632342 (1972-01-01), Salesin et al.
patent: 3700456 (1972-10-01), Smith
patent: 3772032 (1973-11-01), Pearson et al.
patent: 4245036 (1981-01-01), De Winter et al.
Evans Graham
Kingston Samuel B.
Brammer Jack P.
Ciba Geigy AG
Kolodny Joseph G.
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