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AssigneePolaroid Corporation
InventorsJ. Michael Grasshoff, Lloyd D. Taylor, John C. Warner
Estimating the term…
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.
An image-receiving element which comprises a support carrying an image-receiving layer comprising a copolymeric mordant having recurring units according to the formula ##STR12## wherein each of R.sup.1, R.sup.2 and R.sup.3 is independently alkyl;
A diffusion transfer film unit which comprises a photosensitive system comprising at least one photosensitive silver halide emulsion layer having associated therewith a diffusion transfer process image dye-providing material and an image-receiving layer adapted to receive an image dye-providing material after photoexposure and processing, said image-receiving layer comprising a copolymeric mordant having recurring units according to formula ##STR13## wherein each of R.sup.1, R.sup.2 and R.sup.3 is independently alkyl;
A process for forming a diffusion transfer image which comprises in combination, the steps of exposing a photosensitive system comprising at least one photosensitive silver halide emulsion layer having associated therewith a diffusion transfer image dye-providing material;
Dependencies are inferred from the claim text.