Olin Corporation

Arco Chemical Technology, L.p.

Willard F Burt

James M O'Connor

Stephen L Goldstein

Roger W Day

Paul V Grosso

Feagin A Wing, Jr

Henry G Barnowski, Jr

Donald L Lickei

Michael J Morgan

Ronald S Blackwell

Renate C Stegmeier

Augustin T Chen

Benjamin W Tucker

Peter J Whitman

Edward A Barsa

Guilford Jones

The present invention relates to the preparation and use of novel polyurethane polyuretidione crosslinking agents in solvent and water borne coatings systems. These polyuretidione polyurethanes are characterized by their relatively low solution viscosity, and the ability to provide a relatively high crosslink density in the final, cured film, and thereby, coatings with the excellent physical properties and resistance to chemical and environmental exposure of known polyurethane systems without the potential for worker exposure to toxic isocyanates. This invention also relates to a process for the production of these polyuretidiones and their use in pseudo-one and two component coating compositions.

Low viscosity polyuretidione polyurethanes and their use as curatives

Disclosed are new coatings compositions based on an HDI isocyanurate or biuret polyisocyanate and a bis(imine) reaction product of a diaminoalkane containing between two and five carbon atoms with an alkyl aldehyde containing between four and seven carbon atoms (advantageously a bis(imine) product of the reaction of 1,4-diaminobutane and isobutyraldehyde). The latter bis(imine) is completely miscible in HDI isocyanurate and biuret polyisocyanates, and, as a reactive diluent, allows the preparation of high performance coatings formulations that require only small amounts of solvents to achieve a conveniently sprayable viscosity.

Bis(isobutyraldimine) of 1,4-diaminobutane in HDI trimer and

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

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

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.

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Bristol, CT, United States of America

Willard F Burt