Abstract:
Ionic copolymers of styrene sulfonic acid and maleic acid improve covering power when added to the gelatin binder employed in medical silver halide X-ray emulsions.
Abstract:
A silver halide photographic material having a hydrophilic colloid layer comprising fine polymer particles loaded with a hydrophobic photographic addenda provided on a support wherein the polymer has repeating units formed from a nonionic hydrophobic monomer. The nonionic hydrophobic monomer has the formula ##STR1## R.sub.1 and R.sub.2 individually are a hydrogen atom or methyl group, R.sub.3 is a hydrogen atom, an alkyl or aryl group, and m and n are integers of from 2 to 100 individually.
Abstract:
A photographic element having a photographic layer such as silver halide emulsion layer, protective layer, intermediate layer, subcoat layer, diffusion transfer image-receiving layer, antihalation layer and backing layer, can be improved in the adhesion between the layer and support, little curling on drying, and flexibility of the layer, by incorporating into the photographic layer a conversion mixture of a polyvinyl alcohol having a saponification degree of 96% or more and an ethylene-maleic anhydride copolymer.
Abstract:
Polymers, containing polymerized units of at least one compound of the formula ##STR1## and at least one compound of the formula ##STR2## are useful for the preparation of silver halide emulsions.
Abstract:
Compounds useful in making crosslinkable polymers having the formula (I): ##STR1## wherein R is hydrogen or methyl; R.sup.1 is cyano or ##STR2## wherein R.sup.2 is alkyl; Z is --X--R.sup.3 --X-- or ##STR3## wherein each --X-- is --O-- or --NR.sup.4 --, provided at least one --X-- is --NR.sup.4 -- wherein R.sup.4 is hydrogen or alkyl, R.sup.3 is divalent hydrocarbon and D.sub.1 and D.sub.2 together are the carbon atoms necessary to complete a 5 to 7 membered ring. These compounds can be homopolymerized or copolymerized with each other or with other polymerizable ethylenically unsaturated monomers to give crosslinkable polymers. Such polymers can be purified by conventional purification techniques such as dialysis, diafiltration, ultrafiltration without losing their capability of crosslinking. The resulting purified polymers are particularly useful in photographic materials as gelatin extenders, binders or polymeric color couplers.
Abstract translation:可用于制备具有式(I)的交联聚合物的化合物:其中R是氢或甲基; R 1是氰基或者其中R 2是烷基; Z是-X-R3-X-或,其中每个-X-是-O-或-NR4-,提供至少一个-X-是-NR4-,其中R4是氢或烷基,R3是二价烃和 D1和D2一起是完成5至7元环所必需的碳原子。 这些化合物可以彼此均聚或共聚,或与其它可聚合的烯属不饱和单体共聚以产生可交联的聚合物。 这样的聚合物可以通过常规的纯化技术如透析,渗滤,超滤而不失去其交联能力而被纯化。 所得到的纯化聚合物特别可用于照相材料,如明胶增量剂,粘合剂或聚合物色素。
Abstract:
A method for dispersing an oil-soluble photographic additive which comprises dissolving the additive in an organic solvent and dispersing the resulting solution of the photographic additive in water or a hydrophilic colloid composition in the presence of a surface active polymer comprising (a) a homopolymer of units represented by the formula (I): ##STR1## wherein R is an aliphatic hydrocarbon group having 4 to 22 carbon atoms; m.sub.1 and m.sub.2 each is 0 or 1; B is --O-- or --NH--; A is a divalent aliphatic group having 1 to 50 carbon atoms; and M is a hydrogen atom or a cation group capable of forming a salt with a sulfonic acid group, or (b) a copolymer containing at least 5 mol% of units represented by the formula (I) above and the balance of divalent units copolymerizable therewith and comprising at least one of a benzene ring having a methylene group attached thereto and a naphthalene ring having a methylene group attached thereto.
Abstract:
Disclosed herein are compositions useful for the preparation of flexible coatings, particularly to photographic materials, which have improved stability to organic solvents and dissolved salts. The compositions comprise an aqueous dispersion of a hydrophilic colloid and a copolymer having a glass transition temperature less than or equal to 60.degree. C. comprising: from about 50 to about 70 percent by weight of an ester of an ethylenically unsaturated carboxylic acid; from about 2 to about 18 percent by weight of an amide of an ethylenically unsaturated carboxylic acid; from about 10 to about 30 percent by weight of a vinyl benzene; and from about 2 to about 18 percent by weight of a sulfonate monomer having the formula ##STR1## wherein R is hydrogen or alkyl; R.sup.1 is selected from the group consisting of alkylene and ##STR2## R.sup.2 is amino substituted with alkyl or hydrogen, or --CH.sub.2).sub.n O-- wherein n is an integer from 0 to 5; m is either 0 or 1; and X is hydrogen or a monovalent cation.
Abstract:
A photographic element is disclosed having coated on a support a hydrophilic colloid layer containing an activator precursor and loaded polymer particles of from 0.02 to 0.2 micron in average diameter. The polymer particles consist essentially of a hydrophobic polymer of which at least 2 percent by weight is comprised of ionizable repeating units, at least half being cationically ionizable, and a hydrophobic developing agent present in a weight ratio to the polymer of from about 1:4 to 3:1. Silver halide is present in the hydrophilic colloid layer or in an adjacent layer, and the activator precursor is present in a concentration of from 1 to 4 equivalent for each mole of silver halide. The photographic element is capable of being thermally processed.
Abstract:
A photographic binder prepared by heating a mixed aqueous solution of styrene-maleic anhydride copolymer, isobutylene-maleic anhydride copolymer and polyvinyl alcohol in acidic state makes it possible to coat a photographic coating liquid for forming photographic layers in the same manner as in the case of using gelatin and furthermore gives excellent physical properties to the resultant photographic layers.
Abstract:
A photographic silver halide emulsion wherein the emulsion binder comprises the reaction product of 1) a reactant having an amino, mercapto or hydroxy functionality and a cationic active group with 2) a copolymer of maleic anhydride and an ethylenically unsaturated copolymerizable monomer.