Polymeric neutralizing layer with temporary crosslinks from an organo-metallic crosslinking agent

Claim 2

An element adapted for use in a film unit of a photographic diffusion transfer process which comprises a sheet-like support and a polymeric neutralizing layer bonded to said support, said polymeric neutralizing layer being a polymeric acid formed by radiation polymerization of a radiation-polymerizable composition and containing, within the polymeric layer, temporary cross-links from an organometallic cross-linking agent which effect resistance to nonalkaline hydrolysis under film unit assembly conditions and which are subject to substantial degradation under conditions of alkali hydrolysis during film unit processing.

Claim 3

The element of claim 1 wherein said organometallic cross-linking agent is an organotin compound.

Claim 4

The element of claim 2 wherein said organotin cross-linking agent is selected from the group consisting of organotin oxides, hydroxides, carboxylates and mixtures thereof.

Claim 5

The element of claim 3 wherein said organotin cross-linking agent is selected from the group consisting of dibutyltin oxide, dioctyltin oxide and butylstannoic acid.

Claim 6

The element of claim 1 wherein said radiation-polymerizable composition comprises an aliphatic ethylenically unsaturated carboxylic acid or anhydride.

Claim 7

The element of claim 5 wherein the radiation-polymerizable carboxylic acid is acrylic acid.

Claim 8

The element of claim 1 wherein said radiation-polymerizable composition comprises a mixture of acrylic acid and a comonomer selected from the group consisting of mono-N-substituted acrylamides, acrylate esters, methacrylate esters, and mixtures thereof.

Claim 9

The element of claim 7 wherein said comonomer is selected from the group consisting of diacetone acrylamide and t-octylacrylamide.

Claim 10

The element of claim 8 wherein the radiation polymerizable composition includes an organotin compound in an amount ranging from about 5 to about 25 mole percent.

Claim 11

The element of claim 9 wherein the radiation-polymerizable composition includes an organotin compound in an amount ranging from about 5 to about 10 mole percent.

Claim 12

The element of claim 10 wherein the organotin compound is selected from the group consisting of organotin oxides, hydroxides, carboxylates and mixtures thereof.

Claim 13

The element of claim 11 wherein the organotin compound is selected from the group consisting of dibutyltin oxide, dioctyltin oxide and butylstannoic acid.

Claim 14

A photographic film unit for forming a diffusion transfer image comprising at least one sheet-like support; an image-receiving layer; at least one photosensitive silver halide emulsion layer, each said silver halide emulsion having associated therewith an image-forming material; and means for providing a processing composition for developing each said silver halide emulsion after photoexposure and for forming a diffusion transfer image in said image-receiving layer; and a polymeric neutralizing layer; said polymeric neutralizing layer, bonded to at least one said sheet-like support, being a polymeric acid formed by radiation polymerization of a radiation-polymerizable composition and containing, within the polymeric layer, temporary cross-links from an organometallic cross-linking agent which effect resistance to nonalkaline hydrolysis and which are subject to substantial degradation under conditions of alkali hydrolysis during film unit processing.

Claim 15

A photographic film unit for forming a diffusion transfer image comprising at least one sheet-like support; an image-receiving layer; at least one photosensitive silver halide emulsion layer, each said silver halide emulsion having associated therewith an image-forming material; and means for providing a processing composition for developing each said silver halide emulsion after photoexposure and for forming a diffusion transfer image in said image-receiving layer; and a polymeric neutralizing layer; said polymeric neutralizing layer, bonded to at least one said sheet-like support, being a polymeric acid formed by radiation polymerization of a radiation-polymerizable composition and containing, within the polymeric layer, temporary cross-links from an organometallic cross-linking agent which effect resistance to nonalkaline hydrolysis and which are subject to substantial degradation under conditions of alkali hydrolysis during film unit processing.

Claim 16

The element of claim 13 wherein said organometallic cross-linking agent is an organotin compound.

Claim 17

The element of claim 14 wherein said organotin cross-linking agent is selected from the group consisting of organotin oxides, hydroxides, carboxylates and mixtures thereof.

Claim 18

The element of claim 14 wherein said organotin cross-linking agent is selected from the group consisting of dibutylin oxide, dioctyltin oxide and butylstannoic acid.

Claim 19

The element of claim 13 wherein said radiation-polymerizable composition comprises an aliphatic ethylenically unsaturated carboxylic acid or anhydride.

Claim 20

The element of claim 17 wherein the radiation-polymerizable carboxylic acid is acrylic acid.

Claim 21

The element of claim 18 wherein said radiation-polymerizable composition comprises a mixture of acrylic acid and a comonomer selected from the group consisting of mono-N-substituted acrylamides, acrylate esters, methacrylate esters and mixtures thereof.

Claim 22

The element of claim 19 wherein said comonomer is selected from the group consisting of diacetone acrylamide and t-octylacrylamide.

Claim 23

The element of claim 20 wherein the radiation-polymerizable composition includes an organotin compounds in an amount ranging from about 5 to about 25 mole percent.

Claim 24

The element of claim 21 wherein the radiation-polymerizable composition includes an organotin compound in an amount ranging from about 5 to about 10 mole percent.

Claim 25

The element of claim 22 wherein the organotin compound is selected from the group consisting of organotin oxides, hydroxides, carboxylates and mixtures thereof.

Claim 26

The element of claim 23 wherein the organotin compound is selected from the group consisting of dibutyltin oxide, dioctyltin oxide and butylstannoic acid.

Claim 27

A photosensitive element adapted for use in a film unit of a photographic diffusion transfer process comprising a sheet-like support and at least one photosensitive silver halide emulsion layer, each said silver halide emulsion having associated therewith an image-forming material; and a polymeric neutralizing layer bonded to said support, said polymeric neutralizing layer being a polymeric acid formed by radiation polymerization of a radiation-polymerizable composition and containing, within the polymeric layer, temporary cross-links from an organometallic cross-linking agent which resist nonalkaline hydrolysis and which are subject to substantial degradation under conditions of alkali hydrolysis during photosensitive element processing.

Claim 28

A photosensitive element adapted for use in a film unit of a photographic diffusion transfer process comprising a sheet-like support and at least one photosensitive silver halide emulsion layer, each said silver halide emulsion having associated therewith an image-forming material; and a polymeric neutralizing layer bonded to said support, said polymeric neutralizing layer being a polymeric acid formed by radiation polymerization of a radiation-polymerizable composition and containing, within the polymeric layer, temporary cross-links from an organometallic cross-linking agent which resist nonalkaline hydrolysis and which are subject to substantial degradation under conditions of alkali hydrolysis during photosensitive element processing.

Claim 29

The element of claim 25 wherein said organometallic cross-linking agent is an organometallic compound.

Claim 30

The element of claim 26 wherein said organotin cross-linking agent is selected from the group consisting of organotin oxides, hydroxides, carboxylates and mixtures thereof.

Claim 31

The element of claim 27 wherein said organotin cross-linking agent is selected from the group consisting of dibutyltin oxide, dioctyltin oxide and butylstannoic acid.

Claim 32

The element of claim 25 wherein said radiation-polymerizable composition comprises an aliphatic ethylenically unsaturated carboxylic acid or anhydride.

Claim 33

The element of claim 29 wherein the radiation-polymerizable carboxylic acid is acrylic acid.

Claim 34

The element of claim 30 wherein said radiation-polymerizable composition comprises a mixture of acrylic acid and a comonomer selected from the group consisting of mono-N-substituted acrylamides, acrylate ester, methacrylate esters, and mixtures thereof.

Claim 35

The element of claim 31 wherein said comonomer is selected from the group consisting of diacetone acrylamide and t-octylacrylamide.

Claim 36

The element of claim 32 wherein the radiation-polymerizable composition includes an organotin compound in an amount ranging from about 5 to about 25 mole percent.

Claim 37

The element of claim 33 wherein the radiation-polymerizable composition includes an organotin compound in an amount ranging from about 5 to about 10 mole percent.

Claim 38

The element of claim 34 wherein the organotin compound is selected from the group consisting of organotin oxides, hydroxides, carboxylates and mixtures thereof.

Claim 39

The element of claim 35 wherein the organotin compound is selected from the group consisting of dibutyltin oxide, dioctyltin oxide and butylstannoic acid.