Abstract: New types of polymer latices and their use in photographic materials are disclosed. They are obtained by subjecting to radical emulsion polymerisation one or more radical-polymerisable monomers, whose emulsifier-free homopolymers or copolymers possess a glass transition temperature below 65.degree. C., preferably below 30.degree. C., in the presence of a water-soluble polymer of a particular chemical formula.These new types of latices are preferably used in graphic arts contact materials, e.g. daylight materials. They can be used in relative high amounts thus improving dimensional stability without deteriorating the scratch resistance too strongly.A preferred radical-polymerisable monomer mixture comprises n.-butyl acrylate, methyl methacrylate and acrylic acid.

Abstract: A recording material comprising a sheet, ribbon or web support and a hydrophilic colloid binder layer incorporating an ionic polymer in the form of dispersed particulate material providing to said material an antistatic character, characterized in that (i) said ionic polymer is a cross-linked copolymer of an acrylic and/or methacrylic acid ester including 90-99 mole % of acrylate and/or methacrylate and 1 to 10 mole % of tetraallyloxyethane as polyfunctional crosslinking monomer, wherein in said copolymer at least 75% of the ester groups have been transformed into alkali metal carboxylate groups (ii) said ionic polymer is coated at a coverage of at least 14 g/m.sup.2, and (iii) said ionic polymer is present in admixture with said hydrophilic colloid binder in a weight ratio of at least 10/90.

Abstract: Dye-image receiving element for use according to thermal dye sublimation transfer comprising a support having thereon a dye-image receiving layer and optionally a toplayer wherein the dye-image receiving layer or the toplayer comprises the cured product of a moisture-curable binder composition prepared by mixing the following components (A) and (B):(A) 30 to 99 parts by weight of at least one copolymer of olefinically unsaturated compounds having a weight-average molecular weight [Mw] of at least 1500 and containing chemically incorporated moieties capable of undergoing an addition reaction with amino groups, and(B) 1 to 70 parts by weight of organic substances containing blocked amino groups from which substances under the influence of moisture compounds having free primary and/or secondary amino groups are formed,wherein i) the copolymers of component (A) contain intramolecularly bound carboxylic anhydride moieties, with the anhydride equivalent weight of the copolymers being from 196 to 9800 and ii) the bi

Abstract: Phosphonium mordanting polymer comprising randomly distributed recurring units corresponding to the general formula (I) ##STR1## wherein: A represents a unit that is derived from a copolymerizable monomer having a hydrophobic character e.g. acrylonitrile,n represents an integer of from 1 to about 12;each of R.sub.1, R.sub.2 and R.sub.3 (same or different) represents a C.sub.1 -C.sub.8 alkyl group, a cycloalkyl group or an aryl group;X.sup.-- represents an acid anion e.g. a halogen anion, or an anion derived from an inorganic acid;x+y+z represents from about 2 mole % to about 70 mole % with y+z maximum 15 mole % andw represents from about 30 mole % to about 98 mole %.

Abstract: A recording material comprising a sheet, ribbon or web support and a hydrophilic colloid binder layer incorporating an ionic copolymer in the form of dispersed particulate material providing to said material an antistatic character, characterized in that said ionic copolymer is a cross-linked addition copolymer wherein at least 30 mole % of its recurring units are recurrring units containing a sulphonic acid salt group that has been obtained via a reaction of propane sultone or butane sultone with carboxylate salt groups present originally in recurring units of said copolymer.

Abstract: Dye-donor element for use according to thermal dye sublimation transfer comprising a support having on one side a dye layer and on the other side a slipping layer, characterized in that said slipping layer comprises the cured product of a moisture-curable binder composition prepared by mixing the following components (A) and (B):(A) 30 to 99 parts by weight of at least one copolymer of olefinically unsaturated compounds having a weight-average molecular weight [Mw] of at least 1500 and containing chemically incorporated moieties capable of undergoing an addition reaction with amino groups, and(B) 1 to 70 parts by weight of organic substances containing blocked amino groups from which substances under the influence of moisture compounds having free primary and/or secondary amino groups are formed,wherein i) the copolymers of component (A) contain intramolecularly bound carboxylic anhydride moieties, with the anhydride equivalent weight of the copolymers being from 196 to 9800 and ii) the binder composition con

Abstract: Method of making aqueous dispersions of hydrophobic polymer particles loaded with at least one hydrophobic compound, comprising the consecutive steps of dissolving said at least one hydrophobic compound in a water-immiscible organic solvent medium, dispersing the solution obtained in water or in an aqueous medium to form a dispersed phase having an average droplet size lower than 5 .mu.m, mixing the resulting dispersion with a dispersion of hydrophobic polymer particles in water or in an aqueous medium, said hydrophobic polymer particles being swellable in said water-immiscible solvent medium and having an average particle diameter ranging from 0.02 to 5.0 .mu.m, stirring the mixture obtained to allow said hydrophobic compound to associate with said hydrophobic polymer particles, and removing said water-immiscible organic solvent medium by evaporation.

Abstract: Method of forming thermal transfer dye images comprising exposing a recording element comprising at least one layer of an organic photochemical imaging composition comprising a heat-diffusible dye (precursor) monomer, said layer being permeable to said dye (precursor) monomer, to an image-wise distribution of actinic radiation to create a change in its permeability corresponding to said image-wise distribution of actinic radiation, wherein said change in permeability is brought about by the radiation-induced polymerization or crosslinking reaction of said organic photochemical imaging composition combined with a concurrent copolymerization or crosslinking reaction of said heat-diffusible dye (precursor) monomer, bringing said recording element in contact with an image-receiving element, overall heating at least one of said contacting elements to cause diffusion of the heat-diffusible dye (precursor) monomer from the areas having unchanged permeability and transfer to said image-receiving element, causing in t

Abstract: Method of preparing solvent-resistant polymer beads sizing 0.5-5 pm and having a glass transition temperature of at least 40.degree. C. by dissolving in a solvent mixture of water and water-miscible polar organic solvent an Alpha, Beta-ethylenically unsaturated monomer (1) capable of forming a polymer that is soluble in the monomer(s) present in said solvent mixture but which is insoluble in said solvent mixture, a monomer (2) carrying COOH group(s), a monomer (3) carrying halogen atom(s), a free radical-forming polymerization initiator, and a graft-polymerizable polymer containing hydrophilic groups, heating the solution obtained to a temperature from 50.degree. C. to the reflux temperature thereof with stirring to form said beads, converting said COOH group(s) by reaction with a hydroxide into a carboxylic acid salt group, and causing said carboxylic acid salt group to react with said halogen atom to form ester cross-linkages. The beads can be used as spacing agents in a sheet or web material.

Abstract: Method for the preparation of stable aqueous dispersions of finely divided solid spherical polymer beads having an average particle size between about 0.5 and about 5 .mu.m and having a glass transition temperature of at least 40.degree. C. by dissolving in an aqueous solvent mixture at least one .alpha.,.beta.-ethylenically unsaturated monomer capable of forming a polymer that is soluble in the monomer(s) present in said aqueous solvent mixture but which is insoluble in said aqueous solvent mixture, a free radical-forming polymerization initiator, and a graft-polymerizable polymer containing hydrophilic groups, heating the solution to a temperature from 50.degree. C. to the reflux temperature thereof with stirring so as to form said polymer beads. The polymer beads can be used in an antifriction surface layer, an antihalation surface layer, an antistatic surface layer, or in a protective surface layer of a photographic element or in a top layer of a drafting film containing a photosensitive layer.

Abstract: Phosphonium mordanting polymer, that is capable of fixing acid dyes and that comprises randomly distributed recurring units corresponding to the general formula (I) ##STR1## wherein: A represents a unit that is derived from a copolymerizable monomer capable of quenching singlet oxygen e.g. N-vinylimidazole or 2-methyl-1-vinylimidazole;B represents a unit that is derived from a copolymerizable monomer having a hydrophobic character e.g. acrylonitrile or methacrylonitrile;n represents an integer of from 1 to about 12;each of R.sub.1, R.sub.2 and R.sub.3 (same or different) represents a C.sub.1 -C.sub.8 alkyl group e.g. n-butyl, a substituted C.sub.1 -C.sub.8 alkyl group e.g. a methylol group, a cyanoethyl group or an aralkyl group, a cycloalkyl group, an aryl group e.g. phenyl, or a substituted aryl group;X.sup.- represents an acid anion e.g. a halogen anion e.g. Cl.sup.-, Br.sup.- or I.sup.-, or an anion derived from an inorganic acid e.g. NO.sub.3.sup.-, HSO.sub.4.sup.-, SO.sub.4.sup.--, H.sub.2 PO.sub.4.sup.

Abstract: A sheet or web comprising a substrate which is composed of or coated with a hydrophobic resin and carries an antistatic layer, characterized in that the antistatic layer consists essentially of a blockcopolyetherester of dibasic carboxylic acid(s) esterified with ethylene glycol and with a polyoxyethylene glycol having an average molecular weight in the range 1,000 to 10,000, at least 20% by weight of such blockcopolyetherester being constituted by polyoxyethylene-ester chain parts.

Abstract: The present invention provides a method of hardening a proteinaceous surface layer of a photographic silver halide element by incorporating a dextran derivative in said proteinaceous surface layer, said dextran derivative being the reaction product of dextran and an epihalohydrin. The invention also provides a photographic element comprising at least one silver halide emulsion layer and at least one proteinaceous surface layer comprising the reaction product of dextran and an epihalohydrin.

Abstract: The present invention provides a dye diffusion transfer imaging process comprising transferring image-wise by diffusion an acid dye to an image-receiving layer incorporating a non-polymeric phosphonium mordanting agent and a copolymer latex comprising free weak acid groups as a stabilizer for the mordanting agent, wherein the image-wise transfer of said acid dye is performed in the presence of a heterocyclic compound corresponding to one of the following general formulae I, II, and III: ##STR1## wherein: Y represents the non-metallic atoms needed to complete a saturated or unsaturated 5- or 6-membered heterocyclic nucleus, which may carry a fused-on aromatic ring system, and M represents hydrogen, an alkali metal atom, a quaternary ammonium group, or a negative charge forming an inner salt with a quaternized nitrogen atom of the heterocyclic compound. The invention also provides an image receptor element for dye diffusion transfer imaging processes comprising a support and such image-receiving layer.

Abstract: Method for the preparation of stable aqueous dispersions of finely divided solid spherical polymer beads having an average particle size between about 0.5 and about 5 .mu.m and having a glass transition temperature of at least 40.degree. C. by dissolving in an aqueous solvent mixture at least one .alpha.,.beta.-ethylenically unsaturated monomer capable of forming a polymer that is soluble in the monomer(s) present in said aqueous solvent mixture but which is insoluble in said aqueous solvent mixture, a free radical-forming polymerization initiator, and a graft-polymerizable polymer containing hydrophilic groups, heating the solution to a temperature from 50.degree. C. to the reflux temperature thereof with stirring so as to form said polymer beads. The polymer beads can be used in an antifriction surface layer, an antihalation surface layer, an antistatic surface layer, or in a protective surface layer of a photographic element or in a top layer of a drafting film containing a photosensitive layer.

Abstract: Mordanting agents for anionic organic compounds are described which comprise recurring units of the formula: ##STR1## wherein R.sub.1 is hydrogen or methyl; A is methylene or methylene substituted by C.sub.1 -C.sub.5 alkyl;n is 0 or 1;R.sub.2 is alkyl, andX is an acid radical.They are particularly suitable for hindering diffusion of dyes in hydrophilic colloid media e.g. hydrophilic colloid layers of a photographic silver halide element, for hindering diffusion of color couplers in such layers e.g. layers of a radiographic silver halide color element and for the formation of color images by the relief imbibition process.

Abstract: A method of protecting a toner image on a resin-containing material surface comprising applying to the surface carrying the toner image a liquid fixing composition in which the liquid is a hydrocarbon liquid being mainly composed of (a) liquid aliphatic hydrocarbon(s) and which contains in dissolved form a film-forming copolymer composed of:(A) monomers, of the group consisting of C.sub.1 -C.sub.5 aliphatic esters of methacrylic acid and vinyltoluene,(B) monomers of the group consisting of C.sub.7 -C.sub.24 aliphatic esters of methacrylic acid or acrylic acid and optionally(C) monomers of the group consisting of C.sub.1 -C.sub.5 aliphatic esters of acrylic acid and vinyl esters of C.sub.1 -C.sub.10 aliphatic acids.

Abstract: Abrasion marks by dry-friction and the tendency of producing pressure-scratches in photographic materials is reduced by incorporating in the gelatin silver halide emulsion layers polymeric compounds containing recurring units with semicarbazone or alkoxy carbonyl hydrazone groups in the side-chains. These recurring units are represented by one of the formulae: ##STR1## wherein: A is a single bond or --CONH-alkylene-, --COO-alkylene-, or phenylene,B is a single bond or alkylene,R.sup.1 is hydrogen or methyl,R.sup.2 is hydrogen, phenyl or lower alkyl (1-4 C),R.sup.3 is --NH--COOR or ##STR2## wherein R is lower alkyl (1-4 C) and each of R.sup.4, R.sup.5 and R.sup.6 is hydrogen or lower alkyl (1-4 C).

Abstract: A photographic element is described comprising an emulsion layer of low gelatin to silver halide ratio, the emulsion comprising a polymeric compound containing recurring units with ketoiminoguanidinium groups in the side chain to reduce formation of pressure marks.

Abstract: Mordanting agents for anionic organic compounds are described which comprise recurring units of the formula: ##STR1## wherein R.sub.1 is hydrogen or methyl; A is methylene or methylene sustituted by C.sub.1 -C.sub.5 alkyl;N is 0 or 1;R.sub.2 is alkyl, andX is an acid radical.They are particularly suitable for hindering diffusion of dyes in hydrophilic colloid media e.g. hydrophilic colloid layers of a photographic silver halide element, for hindering diffusion of color couplers in such layers e.g. layers of a radiographic silver halide color element and for the formation of color images by the relief imbibition process.