Polaroid Corporation

Polaroid Corporation, Patent Dept.

Louis Locatell, Jr

Charles M Zepp

Ronald F Cieciuch

James W Foley

Howard G Rogers

Ruth C Bilofsky

There are disclosed diffusion transfer color processes and products which employ novel image dye-providing materials which provide image dyes having the chromophoric system represented by the formula ##STR1## X is H, alkyl, aryl or substituted aryl; W is H or alkyl, R is H or alkyl; m and n are each integers of from 2 to 6. The image dye-providing material includes a diffusion control moiety such as a hydroquinonyl group and may be diffusible or nondiffusible as a function of the diffusion control moiety.

Image dye-providing materials

A class of quaternary nitrogen-containing polymeric materials, which upon contact with alkali provide substantial light-absorbing or opacifying properties, is disclosed. The polymeric materials comprise repeating units of the formula: ##STR1## wherein the cyclic quaternary nitrogen-containing moiety is a 2-, 3-, or 4-pyridinium moiety; R.sup.1 and R.sup.2 are independently hydrogen, alkyl, substituted alkyl, cycloalkyl, aryl, aralkyl, alkaryl, halo, or R.sup.1 and R.sup.2 together comprise the atoms necessary to complete a six-membered, substituted or unsubstituted benzenoid ring; R.sup.3 is hydrogen or alkyl; X is an anion; and Y is hydrogen, alkyl, substituted alkyl, cycloalkyl, aryl, aralkyl, alkaryl or halo.

Quaternary nitrogen-containing polymers and articles including same

There are described novel dye compounds which are represented by the formula ##STR1## wherein A is ##STR2## X is H, alkyl, aryl such as phenyl or naphthyl, or substituted aryl; W is H or alkyl; R is H or alkyl; Z and Y are each H or monovalent radicals; l and p are each 1 or 2 and m and n are each integers of from 2-6.

Bicyclo nitrogenheterocyclic substituted sulfofluoresceins, fluoresceins

Diffusion transfer color processes and products are disclosed employing image-dye providing materials providing magenta image dyes having the chromophoric system represented by the formula ##STR1## wherein each R is the same or different and is an alkyl group, and each X is the same or different and is hydrogen or an alkyl group (including substituted alkyl). The dye image-providing material includes a diffusion control moiety, such as a hydroquinonyl group, and may be diffusible or nondiffusible as a function of the diffusion control moiety.

Magenta dye developers

The present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein R is hydrogen or alkyl, which compounds are useful in photographic products and processes.

Xanthene compounds

In one embodiment, the present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein X is ##STR2## wherein R' is alkyl; Y is an electron-withdrawing group and A is an anion. In another embodiment, the present invention is concerned with photographic products and processes employing these xanthene compounds.

3,6-Di(N-indolinyl)-9-sulfonamidophenyl-xanthenes

There are disclosed diffusion transfer color processes and products which employ novel image dye-providing materials which provide image dyes having the chromophoric system represented by the formula ##STR1## wherein A is ##STR2## X is H, alkyl, aryl or substituted aryl; W is H or alkyl, R is H or alkyl; m and n are each integers of from 2 to 6. The image dye-providing material includes a diffusion control moiety such as a hydroquinonyl group and may be diffusible or nondiffusible as a function of the diffusion control moiety.

Novel image dye-providing materials, photographic products and processes

In one embodiment, the present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein R' is alkyl; Y is an electron-withdrawing group and A is an anion. In another embodiment, the present invention is concerned with photographic products and processes employing these xanthene compounds.

Novel xanthene compounds and photographic products and processes

This invention relates to styrene polymers containing pendant aminoethanethiol moieties which are useful as complexing agents for silver ions and/or soluble silver complex in photography.

Growing community of inventors

Wellesley Hills, MA, United States of America

Louis Locatell, Jr