Minnesota Mining and Manufacturing Company

S Prabhakara Rao

Terrance P Smith

David W Macomber

Valdis Mikelsons

Polymeric dyes that comprise (a) segments that render the dyes soluble or dispersible in hydrocarbon solvents and (b) segments that impart color. The polymeric dyes can be introduced into hydrocarbon solvents or formed in hydrocarbon solvents to form stable colored dispersions, which can be used as toners for electrophotography. In these toners, the polymeric dye contains macromeric moieties that render the polymeric dye dispersible in hydrocarbon solvents. The polymeric dye may contain either a charge-directing chelating moiety or a surface-release promoting moiety or both of these moieties.

Liquid toners with hydrocarbon solvents

Electrostatic toners comprising polymeric dyes comprising of (1) discrete segments that are dispersible in highly fluorinated solvents and (2) discrete color-imparting segments. These toners can be prepared by a means of a polymerization process, wherein macromers containing highly fluorinated dispersible segments are grafted onto a polymer having chromophores attached thereto.

Liquid toners utilizing highly fluorinated solvents

A liquid toner composition for use in electrographic imaging comprises a non-aqueous solvent and a soluble dispersant made from thermodynamically compatible polymers containing functional groups with good adsorption properties for cyan, magenta, yellow and black pigments. The invention also describes the incorporation of reactive functional groups that crosslink on heat treatment to improve modulus and scratch resistance.

Liquid toners from soluble polymeric dispersants with reactive groups

The receptor sheet of the present invention includes a substrate on which is coated an image-receiving layer formed from a water-based coating composition. The water-based coating composition includes a major amount of a latex polymer having a Tg of no greater than about 30.degree. C.; a minor amount of a water-soluble low molecular weight compound or salt having reactive functional groups; and a minor amount of a water-soluble carbodiimide.

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Maplewood, MN, United States of America

S Prabhakara Rao