Image-receiving material for use in diffusion transfer reversal

Claim 2

An image-receiving material suited for silver complex diffusion transfer (DTR) processing, wherein a polyvinyl chloride resin support is directly coated with a DTR-image receiving layer that contains developing nuclei in a binder medium, characterized in that said image-receiving layer comprises in percent by weight on its total weight the following ingredients: 1.3% to 80% of proteinaceous colloid, 0% to 85% of colloidal silica, 1.0% to 70% of an ionogenic polyester-polyurethane applied from an aqueous dispersion wherein isocyanate groups still present in its structure have reacted with an inomeric compound containing at least one active hydrogen atom and a carboxylate or sulphonate salt group, the number of said salt groups being sufficient to render said polyester polyurethane dispersible in an aqueous medium, and 0% to 30% of a siloxane forming a reaction product with the colloidal silica, the dry coverage of the image receiving layer being in the range of 0.2 g to 16 g per m2, said siloxane being present when said silica is present in an amount substantially sufficient to form said reaction product with said silica, said resin support being made of a vinyl chloride homopolyer or copolymer, the copolymer containing at least 50% by weight of vinyl chloride units and being free from hydrophilic recurring units.

Claim 3

A material according to claim 1, wherein the proteinaceous colloid is selected from the group of gelatin, caseine and mixtures thereof.

Claim 4

A material according to claim 1, wherein the sulfonate and/or carboxylate groups total about 0.5 to about 15% by weight with respect to the polyester-polyurethane.

Claim 5

A material according to claim 1, wherein the polyester-polyurethane is a polyurethane of an essentially linear polyester compound that has two terminal hydroxyl groups, the polyester having preferably a molecular weight of about 300 to about 20,000.

Claim 6

A material according to claim 1, wherein said polyester-polyurethane contains linear polyester structural parts corresponding with a polyester of a dicarboxylic acid containing up to 6 carbon atoms and a polyhydric aliphatic alcohol containing up to 6 carbon atoms.

Claim 7

A material according to claim 1, wherein the ionogenic polyester-polyurethane is applied from an aqueous dispersion containing in percentage by weight with respect to the total dispersion composition the reaction product of: (1) the polyester of adipic acid and hexanediol with average molecular weight 840, (23%), (2) 4,4'-diisocyanato-dicyclohexylmethane (14%), (3)dimethylolpropionic acid (2%), (4) trimethylamine (1.5%), said reaction product being dispersed in water containing 7.5% by weight of N-methylpyrrolidinone, the balance being water.

Claim 8

A material according to claim 1, wherein the siloxane compound is within the scope of the following general formula: ##STR6## wherein: R 1 represents one of the following groups: ##STR7## wherein A represents a C 1 -C 4 alkylene group, and ##STR8## wherein Y is a bivalent hydrocarbon chain including such chain interrupted by oxygen, or a bivalent hydrocarbon group that is linked at the side of the silicon atom to oxygen, X represents oxygen, each of R 2 , R 3 and R 4 (same or different) represent a hydrocarbon group including a substituted hydrocarbon group, and n is 1.

Claim 9

An image-receiving material suited for silver complex diffusion transfer (DTR) processing, wherein a polyvinyl chloride resin support is directly coated with a DTR-image receiving layer that contains developing nuclei in a binder medium, characterized in that said image-receiver layer comprises in percent by weight on its total weight the following ingredients: 1.3% to 80% of proteinaceous colloid, 0% to 85% of colloidal silica, 1.0% to 70% of an ionogenic polyester-polyurethane applied from an aqueous dispersion wherein isocyanate groups still present in its structure have reacted with an inomeric compound containing at least one active hydrogen atom and a carboxylate or sulphonate salt group, the number of said salt groups being sufficient to render said polyester polyurethane dispersible in an aqueous medium, and 0% to 30% of a siloxane forming a reaction product with the colloidal silica, the dry coverage of the image receiving layer being in the range of 0.2 g to 16 g per m2, said siloxane being present when said silica is present in an amount substantially sufficient to form said reaction product with said silica, said polyvinyl chloride support being provided with an adhesive coating at the side thereof opposite to the DTR-image-receiving layer, the adhesive coating being protected by a strippable temporary support.

Claim 10

An image-receiving material suited for silver complex diffusion transfer (DTR) processing, wherein a polyvinyl chloride resin support is directly coated with a DTR-image receiving layer that contains developing nuclei in a binder medium, characterized in that said image-receiver layer comprises in percent by weight on its total weight the following ingredients: 1.3% to 80% of proteinaceous colloid, 0% to 85% of colloidal silica, 1.0% to 70% of an ionogenic polyester-polyurethane applied from an aqueous dispersion wherein isocyanate groups still present in its structure have reacted with an inomeric compound containing at least one active hydrogen atom and a carboxylate or sulphonate salt group, the number of said salt groups being sufficient to render said polyester polyurethane dispersible in an aqueous medium, and 0% to 30% of a siloxane forming a reaction product with the colloidal silica, the dry coverage of the image receiving layer being in the range of 0.2 g to 16 g per m2, said siloxane being present when said silica is present in an amount substantially sufficient to form said reaction product with said silica, said polyvinyl chloride support being provided with an adhesive coating at the side thereof opposite to the DTR-image-receiving layer, the adhesive coating being protected by a strippable temporary support.

Claim 11

An image-receiving material suited for silver complex diffusion transfer (DTR) processing, wherein a polyvinyl chloride resin support is directly coated with a DTR-image receiving layer that contains developing nuclei in a binder medium, characterized in that said image-receiving layer comprises in percent by weight on its total weight the following ingredients: 1.3% to 80% of proteinaceous colloid, 0% to 85% of colloidal silica, 1.0% to 70% of an ionogenic polyester-polyurethane applied from an aqueous dispersion wherein isocyanate groups still present in its structure have reacted with an inomeric compound containing at least one active hydrogen atom and a carboxylate or sulphonate salt group, the number of said salt groups being sufficient to render said polyester polyurethane dispersible in an aqueous medium, and 0% to 30% of a siloxane forming a reaction product with the colloidal silica, the dry coverage of the image receiving layer being in the range of 0.2 g to 16 g per m2, said siloxane being present when said silica is present in an amount substantially sufficient to form said reaction product with said silica, said image receiving layer containing a black-and-white photograph and being incorporated in a laminate sandwiched between a clear protective resin cover sheet and said polyvinyl chloride support.

Claim 12

An image-receiving material suited for silver complex diffusion transfer (DTR) processing, wherein a polyvinyl chloride resin support is directly coated with a DTR-image receiving layer that contains developing nuclei in a binder medium, characterized in that said image-receiving layer comprises in percent by weight on its total weight the following ingredients: 1.3% to 80% of proteinaceous colloid, 0% to 85% of colloidal silica, 1.0% to 70% of an ionogenic polyester-polyurethane applied from an aqueous dispersion wherein isocyanate groups still present in its structure have reacted with an inomeric compound containing at least one active hydrogen atom and a carboxylate or sulphonate salt group, the number of said salt groups being sufficient to render said polyester polyurethane dispersible in an aqueous medium, and 0% to 30% of a siloxane forming a reaction product with the colloidal silica, the dry coverage of the image receiving layer being in the range of 0.2 g to 16 g per m2, said siloxane being present when said silica is present in an amount substantially sufficient to form said reaction product with said silica, said image receiving layer containing a black-and-white photograph and being incorporated in a laminate sandwiched between a clear protective resin cover sheet and said polyvinyl chloride support.

Claim 13

A material according to claim 9, wherein said cover sheet is a polyethylene terephthalate sheet coated with a polyethylene layer.

Claim 14

A material according to claim 9, wherein said image receiving layer contains a black-and-white photographic image and before being incorporated into said laminate, the image receiving layer has been treated after the image formation therein with a hardening agent for said proteinaceious colloid therein.

Claim 15

A material according to claim 11, wherein the hardening agent is a poly-epoxy compound or compound containing N-methylol groups.

Claim 16

A material according to claim 11, wherein the hardening agent is triglycidyl-triazolidin-3,5-dione.