Diffusion control layers in diffusion transfer photographic products

A photosensitive element for use in diffusion transfer photographic processes comprising:

• a support layer;
• at least two selectively sensitized silver halide emulsion layers coated upon said support, each emulsion layer having associated therewith a processing composition soluble and diffusible dye image-forming material;
• and
• an interlayed positioned between at least two of said silver halide emulsion layers, which interlayer comprises a polymerization product of a monomer capable of undergoing .beta.-elimination in an alkaline environment;
• said interlayer being permeable to alkali but substantially impermeable to said processing composition soluble and diffusible dye image-forming material until said .beta.-elimination;
• said polymerization product comprising recurring units of the formula ##STR12## wherein R is the addition polymerization product of an ethylenically unsaturated alkyl group of two or three carbon atoms;
• A, D and E are selected from the group consisting of hydrogen, methyl and phenyl provided that no more than one of A, E or D may be methyl or phenyl;
• and
• Y is an activating group.

A photosensitive element for use in diffusion transfer photographic processes comprising:

• a support layer;
• at least a photosensitive silver halide emulsion layer coated upon said support, said emulsion layer having associated therewith a processing composition soluble and diffusible dye image-forming material;
• and
• an overcoat comprising a polymerization product of a monomer capable of undergoing .beta.-elimination in an alkaline environment, said overcoat being permeable to alkali but substantially impermeable to said processing composition soluble and diffusible dye image-forming material until said .beta.-elimination;
• said polymerization product comprising recurring units of the formula ##STR14## wherein R is the addition polymerization product of an ethylenically unsaturated alkyl group of two or three carbon atoms;
• A, D and E are selected from the group consisting of hydrogen, methyl and phenyl provided that no more than one of A, E or D may be methyl or phenyl;
• and
• Y is an activating group.

A photosensitive element for use in diffusion transfer photographic processes comprising:

• a support layer;
• at least two selectively sensitized silver halide emulsion layers coated upon said support, each emulsion layer having associated therewith a processing composition soluble and diffusible dye image-forming material;
• and
• an interlayer positioned between at least two of said silver halide emulsion layers, which interlayer comprises a mixture of polymers, at least one of which polymers comprises a polymerization product of a monomer capable of underoging .beta.-elimination in an alkaline environment, said interlayer being permeable to alkali but substantially impermeable to said processing composition soluble and diffusible dye image-forming material until said .beta.-elimination, said polymerization product comprising recurring units of the formula ##STR16## wherein R is the addition polymerization product of an ethylenically unsaturated alkyl group of two or three carbon atoms;
• A, D and E are selected from the group consisting of hydrogen, methyl and phenyl provided that no more than one of A, E or D may be methyl or phenyl;
• and
• Y is an activating group.

A photographic film unit comprising in combination a photosensitive element and a diffusion transfer image-receiving element, said combination comprising:

• a support layer;
• at least two selectively sensitized silver halide emulsion layers coated upon said support each emulsion layer having associated therewith a processing composition soluble and diffusible dye image-forming material;
• an interlayer positioned between at least two of said silver halide emulsion layers, which interlayer comprises a polymerization product of a monomer capable of undergoing .beta.-elimination in an alkaline environment, said interlayer being permeable to alkali but substantially impermeable to said processing composition soluble and diffusible dye image-forming material until said .beta.-elimination, said polymerization product comprising recurring units of the formula ##STR17## wherein R is the addition polymerization product of an ethylenically unsaturated alkyl group of two or three carbon atoms;
• A, D and E are selected from the group consisting of hydrogen, methyl and phenyl provided that no more than one of A, E or D may be methyl or phenyl;
• and Y is an activating group;
• and
• an alkaline processing composition permeable and dyeable image-receiving layer.

A photographic film unit comprising in combination a photosensitive element and a diffusion transfer image-receiving element, said combination comprising:

• a support layer;
• at least two selectively sensitized silver halide emulsion layers coated upon said support each emulsion layer having associated therewith a processing composition soluble and diffusible dye image-forming material;
• and
• an interlayer positioned between at least two of said silver halide emulsion layers, which interlayer comprises a mixture of polymers at least one of which polymers comprises a polymerization product of a monomer capable of undergoing .beta.-elimination in an alkaline environment, said interlayer being permeable to alkali but substantially impermeable to said processing composition soluble and diffusible dye image-forming material until said .beta.-elimination, said polymerization product comprising recurring units of the formula ##STR21## wherein R is the addition polymerization product of an ethylenically unsaturated alky group of two or three carbon atoms, A, D and E are selected from the group consisting of hydrogen, methyl and phenyl provided that no more than one of A, E or D may be methyl of phenyl, and Y is an activating group;
• and
• an alkaline processing composition permeable and dyeable image-receiving layer.

An image-receiving element for use in diffusion transfer photographic processes comprising:

• a support layer,
• a polymeric acid layer,
• a polymeric layer comprising a polymerization product of a monomer capable of undergoing .beta.-elimination in an alkaline environment, said polymerization product being substantially impermeable to processing composition until said .beta.-elimination occurs, said polymerization product comprising recurring units of the formula ##STR22## wherein R is the addition polymerization product of an ethylenically unsaturated alkyl group of two or three carbon atoms, A, D and E are selected from the group consisting of hydrogen, methyl and phenyl provided that no more than one of A, E or D may be methyl or phenyl;
• and Y is an activating group, and
• an alkali permeable and dyeable image-receiving layer.

An image-receiving element for use in diffusion transfer photographic processing comprising:

• a support layer,
• a polymeric acid layer,
• a polymeric layer comprising a mixture of polymers, at least one of which polymers comprises a polymerization product of a monomer capable of undergoing .beta.-elimination in an alkaline environment, said polymerization product being substantially impermeable to processing composition until said .beta.-elimination occurs, said polymerization product comprising recurring units of the formula ##STR24## wherein R is the addition polymerization product of an ethylenically unsaturated alkyl group of two or three carbon atoms, A, D and E are selected from the group consisting of hydrogen, methyl, and phenyl provided that no more than one of A, E, or D may be methyl or phenyl;
• and Y is an activating group;
• and
• an alkali permeable and dyeable image-receiving layer.

A photographic film unit comprising in combination a photosensitive element and a diffusion transfer image-receiving element, said image-receiving element comprising:

• a support layer,
• a polymeric acid layer,
• a polymeric layer comprising a polymerization product of a monomer capable of undergoing .beta.-elimination in an alkaline environment, said polymerization product being substantially impermeable to processing composition until said .beta.-elimination occurs, said polymerization product comprising recurring units of the formula ##STR26## wherein R is the addition polymerization product of an ethylenically unsaturated alkyl group of two or three carbon atoms, A, D and E are selected from the group consisting of hydrogen, methyl and phenyl provided that no more than one of A, E or D may be methyl or phenyl;
• and Y is an activating group;
• and
• an alkali permeable and dyeable image-receiving layer.

A photographic film unit comprising in combination a photosensitive element and a diffusion transfer image-receiving element, said photosensitive element comprising:

• a photosensitive element support layer,
• at least two selectively sensitized silver halide emulsion layers coated upon said support each emulsion layer having associated therewith a processing composition soluble and diffusible dye image-forming material, and
• an interlayer comprising a polymerization product comprising 2-cyano-ethyl acrylate;
• said interlayer being permeable to alkali but substantially impermeable to said processing composition soluble and diffusible dye image-forming material until .beta.-elimination of said polymerization product under the alkaline environment of said processing composition;
• and said image-receiving element comprising:
• an image-receiving element support;
• a polymeric acid layer;
• a polymeric layer comprising poly(2-cyano-ethyl acrylate);
• and
• an alkali permeable and dyeable image-receiving layer.

A photographic diffusion transfer film unit comprising:

• a. a photosensitive element comprising at least a photosensitive silver halide emulsion layer having associated therewith a processing composition soluble and diffusible image-forming material;
• b. an image-receiving element;
• c. means for discharging an alkaline processing composition within said film unit;
• and
• d. a diffusion control layer in at least one of said photosensitive element or said image-receiving element;
• said diffusion control layer comprising a polymerization product of a monomer capable of undergoing .beta.-elimination in an alkaline environment, said diffusion control layer being permeable to alkali but substantially impermeable to said diffusible image-forming material until said .beta.-elimination, said polymerization product comprising recurring units of the formula ##STR28## wherein R is the addition polymerization product of an ethylenically unsaturated alkyl group of two or three carbon atoms;
• A, D and E are selected from the group consisting of hydrogen, methyl and phenyl provided that no more than one of A, E, or D may be methyl or phenyl;
• and
• Y is an activating group.

A photographic diffusion transfer film unit comprising:

• a. a photosensitive element comprising at least a photosensitive silver halide emulsion layer having associated therwith a processing composition soluble and diffusible image-forming material;
• b. an image-receiving element;
• c. means for discharging an alkaline processing composition within said film unit;
• and
• d. a diffusion control layer in at least one of said photosensitive element or said image-receiving element;
• said diffusion control layer comprising a polymerization product of a monomer capable of undergoing .beta.-elimination in an alkaline environment, said diffusion control layer being substantially impermeable to alkali until said .beta.-elimination, said polymerization product comprising recurring units of the formula ##STR29## wherein R is the addition polymerization product of an ethylenically unsaturated alkyl group of two or three carbon atoms;
• A, D and E are selected from the group consisting of hydrogen, methyl and phenyl provided that no more than one of A, E, or D may be methyl or phenyl;
• and
• Y is an activating group.