Photographic film unit for the production of colored transfer images
AssigneeAgfa-Gevaert
InventorsGunter Helling, Werner Krafft, Kurt Findeisen, Wolfgang Himmelmann
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Abstract
A photographic film unit for the production of colored transfer images contains an integral neutralization system consisting of an acid polymer layer and a retarding layer. The acid polymer layer consists of a copolymer of 5 to 50 % by weight of polymerized carboxyalkyl (meth)acrylate units together with other acid monomers and optionally nonacid monomers. A preferred carboxyalkyl (meth)acrylate is the dimeric acrylic acid. The acid polymer has high acid number and low glass transition temperature.
Claims4
In a photographic film unit for producing colored transfer images containing on a dimensionally stable support layer an image-receiving layer, a photosensitive element comprising at least one photosensitive silver halide emulsion layer and associated thereto a non-diffusing color-providing compound, and a neutralizing element consisting of a neutralizing layer and of a retarding layer which delays neutralization, the neutralizing layer consisting of a copolymer essentially containing polymerized units of ethylenically unsaturated monomers containing acid groups and, optionally, up to 10% by weight of polymerized units of ethylenically unsaturated monomers free from acid groups, the improvement according to which the copolymer contains from 5 to 50% by weight of polymerized units of ethylenically unsaturated monomers corresponding to the following formula
- in which
- R.sup.1 represents hydrogen or methyl and
- R.sup.2 represents an alkylene group containing from 1 to 3 carbon atoms.
Dependencies are inferred from the claim text.