Eastman-kodak Company

James A Van Allan

George A Reynolds

Michael T Regan

Joseph Y Kaukeinen

Louis J Rossi

Donald P Specht

Hal E Wright

Melvin S Bloom

Samir Y Farid

Michael P Cunningham

Frank G Webster

William J Staudenmayer

William E Yoerger

Lawrence E Contois

Jerome H Perlstein

Constantine C Petropoulos

Thomas E Goliber

Photoconductive compositions having improved quantum efficiency are disclosed. The compositions comprise:

Photoconductive composition and elements comprising two different

In general, materials having the structure ##STR1## wherein A represents phenylene, napthylene, anthracenediyl, and dibenzothien-diyl;

Electrophoretic migration imaging process

In general, materials having the structure ##STR1## wherein n equals 1 or 2;

Electrophoretic migration imaging dispersion

Electrophotographic papers comprising electrically conducting paper supports and photoconductive insulating compositions in the form of organic photoconductive dispersions are described. Particles of certain polyphenyl organic photoconductors with para-linked phenyl groups, or polyarylated unsaturated organic photoconductors are dispersed in cellulose nitrate to provide useful photoconductive insulating dispersions.

Electrophotographic papers employing organic photoconductors

Pyrylium, thiapyrylium and selenapyrylium salts and derivatives thereof having a trimethine linkage containing an aryl substituent attached to at least one carbon atom of the trimethine linkage are disclosed. Radiation sensitive compositions, e.g., photoconductive compositions, containing such materials are also disclosed.

Radiation sensitive compositions containing pyrylium compounds

Sensitizers for photoconductive compositions and elements are disclosed. The sensitizers are 2,4,6 tri substituted pyrylium dye salts wherein at least one of said substituents is a 5 or 6 membered heterocyclic ring having at least one atom selected from the group consisting of N, O and S.

Pyrylium sensitizers for photoconductive compositions

In general, materials having the structure ##STR1## WHEREIN N EQUALS 1 OR 2;

Novel compounds having the following structure ##STR1## wherein X represents O, S or NR and R is benzyl or butyl;

Heterocyclic ethenyl or vinyl heterocyclic or aromatic compounds for

Materials having the following structure ##STR1## have been found useful in migration imaging processes.

Migration imaging process and compositions

Merocyanine dyes comprising 2-(heterocyclylcarbonylmethylene)thiazolines and selenazolines and 2-[di(heterocyclylcarbonyl)methylene]thiazolines and selenazolines are efficient sensitizers for light-sensitive unsaturated materials such as unsaturated vesiculators which release a gas upon exposure to radiation, photocrosslinkable unsaturated polymers, and azides such as photocrosslinkable polymeric azides used in photomechanical resists and lithographic plates.

Sensitizers for photocrosslinkable polymers

This invention relates to organic compounds useful as sensitizers for organic photoconductive compositions having one of the following formulas: ##SPC1## ##SPC2## Wherein: R.sup.1 represents a hydrogen atom, an alkyl radical having 1 to about 15 carbon atoms, a substituted alkyl radical wherein the alkyl moiety contains from 1 to about 15 carbon atoms and wherein the substituents are phenyl radicals or alkoxy radicals containing 1 to about 4 carbon atoms, a phenyl radical, and a substituted phenyl radical having as substituents alkyl radicals having 1 to about 15 carbon atoms or alkoxy radicals having 1 to about 4 carbon atoms; R.sup.2 represents R.sup.1 and a radical having the following formula: ##EQU1## X represents a hetero atom selected from the group consisting of an oxygen and a sulfur atom; and Z.sup.- is an anionic function.

Growing community of inventors

Rochester, NY, United States of America

James A Van Allan