Olin Corporation

The Dow Chemical Company

Paul V Grosso

Feagin A Wing, Jr

Roger W Day

Michael J Morgan

Willard F Burt

Richard A Wolf

Renate C Stegmeier

Williard F Burt

Guilford Jones

John C Herbaugh

An electrostatic method is disclosed for providing multicolor imaging from a single toner bath. The toner bath is a blend of individual toners, each of which contains a color precursor different from the others. Also disclosed is a method for the double encapsulation of toner particles to produce toner particles characterized by multiple encapsulation.

Electrostatic method for multicolor imaging from a single toner bath

An electrostatic multicolor imaging system employs a transfer surface which is charged imagewise such that blended microcapsular chromogenic photohardenable toner particles are electrostatically deposited only in those charged regions of a latent image formed on the surface where colors are to be provided for the image.

Electrostatic system for multicolor imaging using microcapsular

Described herein are photopolymerizable compositions comprising at least one polymerizable ethylenically unsaturated compound, and an initiating combination of an organic soluble xanthene dye compound and an organic activator compound. These compositions are useful as radiation-curable coatings, photocurable films, and photoactive films.

Compositions containing organic-soluble xanthene dye photoinitiators

Compounds of the formula: ##STR1## where Q is a polymerizable olefin substituent;

Polymers containing aromatic-azo-aliphatic moieties capable of

A positive or negative latent image can be developed with negatively or positively charged toner particles, respectively, that are microcapsular. The shell material of the toner particles is a melamine-formaldehyde resin or a starch-based material. The core is a liquid solution comprising at least a liquid, ethylenically unsaturated monomer, a leuco dye and a photoinitiator.

Composition and electrophotographic use of microcapsular photoactive

Compounds of the formula: ##STR1## wherein Q is a polymerizable olefin substituent;

Polymerizable aromatic-azo-aliphatic compounds capable of generating

This, invention relates to electrostatic imaging systems, and, more particularly, color-self-developing toner particles and processes for the fabrication and use thereof. A blend of these toner particles is useful in multicolor electrostatic imaging using a single dry or liquid toner bath. Potential applications include full-color xerographic copying, full-color printing, full-color computer-generated imaging, and the like.

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West Hartford, CT, United States of America

Paul V Grosso