Polaroid Corporation

Polaroid Corporation, Patent Dept.

J Michael Grasshoff

Lloyd D Taylor

John C Warner

Jerome L Reid

Myron S Simon

Multi-functional vinylbenzyl and vinylphenyl pendant thymine (and uracil) groups are disclosed. The monomers can be used for the production of polymers useful in photoresist and other compositions as a function of the crosslinking reactivity of the pendant groups. Images in polymer are provided by exposure to actinic radiation (e.g., UV), containing such polymer and by solvent removal of non-exposed regions.

Copolymers having pendant functional thymine groups

Method of imaging using a polymeric photoresist having pendant

Vinylbenzyl thymine monomers

Copolymeric mordant materials containing recurring units according to the following formula are disclosed: ##STR1## In such copolymers, each of R.sup.1, R.sup.2 and R.sup.3 can independently be alkyl; substituted-alkyl; cycloalkyl; aryl; aralkyl; alkaryl; or at least two of R.sup.1, R.sup.2 and R.sup.3, together with the quaternary nitrogen atom to which they are bonded, can complete a saturated or unsaturated, substituted or unsubstituted nitrogen-containing heterocyclic ring; X is an anion; R.sup.4 is hydrogen or alkyl (e.g. methyl). The pendent 'b' group contain hydrogen-bonding sites for promotion of self-associated aggregation and ring unsaturation for photocyclization and control of physical properties (e.g., water insensitivity) of the image-receiving layer. The copolymeric mordant materials can be utilized as image-receiving layers in photographic products and processes of the diffusion transfer type. The mordants are especially adapted to the production of dye images exhibiting favorable maximum density (D.sub.max) and rates of dye transfer properties.

Copolymeric mordants and photographic products and processes containing

Copolymeric mordants coatable from water into copolymeric mordant layers for photographic products and processes are disclosed. The copolymeric mordants comprise polymerized repeating units from first and second polymerizable vinylbenzyl quaternary ammonium compounds (the first polymerizable compound, if homopolymerized, providing a water-soluble homopolymer and the second polymerizable compound being a micelle-forming compound which, if homopolymerized, forms a water-insoluble homopolymer). The copolymeric mordants are coatable to image-receiving layers for the mordanting of dyes in photographic products and processes.

Polymeric derivatives of tetrazole-5-thiols are useful in conjunction with photosensitive silver halide elements as interlayers to provide interimage control, as dispersants for dye image-forming materials or as silver scavengers.

Photographic uses of polyvinyl-phenylmercapto-tetrazoles

High molecular weight, sulfur containing compounds are prepared by polymerization of their monomeric precursors in an aqueous medium with a tetra-alkylated azo-bis-acetonitrile catalyst.

Polymerization of sulfur containing compounds in aqueous media utilizing

Novel compounds are disclosed which release a photographic reagent in the presence of alkali and are therefore useful in photographic products and processes. The compounds may be defined as quinone- or naphthoquinonemethide precursors containing a mercapto-azole or azine photographic reagent moiety.

Quinone methide photograhpic reagent precursors

A process of forming a dye mordant precursor for a photographic system by reacting a p-amino phenethyl alcohol with a trialkyl phosphate at a controlled temperature, and dehydrating the resultant p-dialkyl amino phenethyl alcohol with a strong alkali in the presence of a polymerization inhibitor.

Preparation of N,N-dialkyl p-vinyl anilines

Novel polymeric derivatives of tetrazole-5-thiols and their metal and ammonium salts, and the preparation of such compounds which are useful as gelatin thickeners or in their production, are disclosed.

Novel polymeric derivatives of tetrazole-5-thiols and their metal and

Novel compounds are disclosed which release a silver halide solvent in the presence of alkali, which compounds may be defined as quinone-or naphthoquinone-methide precursors containing the silver halide solvent moiety. These novel compounds are useful in photographic products and processes.

Growing community of inventors

Hudson, MA, United States of America

J Michael Grasshoff