Photographic film unit with crosslinked neutralization layer

Claim 1

A photographic film unit for the production of colored transfer images, comprising a dimensionally stable layer support, an image receptor layer, a light-sensitive element having at least one light-sensitive silver halide emulsion layer and a non-diffusible dye-providing compound associated therewith, and a neutralisation system consisting of a neutralisation layer having a polymer which contains free acid groups and a barrier layer which retards neutralisation, said neutralisation system being located on one side of a laminate consisting of said light sensitive element and said image receptor layer with said barrier layer of said system arranged between said laminate and said neutralisation layer, wherein the improvement comprises the neutralisation layer contains a crosslinked copolymer consisting of 30 to 99 mol % of copolymerized acrylic acid or methacrylic acid units and 1 to 30 mol % of copolymerized units of a cross-linking agent having at least two copolymerizable carbon-carbon double bonds, the balance being copolymerised units selected from the group consisting of copolymerizable monomeric compounds containing a copolymerizable carbon-carbon-double bond and a sulfonic acid group and copolymerizable monomeric compounds free from acid groups, selected from alkyl acrylates, cycloalkyl acrylates, alkyl methacrylates and cycloalkyl methacrylates, said copolymer being crosslinked through said crosslinking agent having at least two copolymerizable double bonds.