Celanese Gmbh

Charles B Rybny

Thomas M Powanda

Eli Levine

Michael T Nowak

John C Trebellas

Charles A DeFazio

Donald E Sargent

This invention provides a substantially transparent curable coating composition which upon curing with ultraviolet radiation converts into a glossy opaque film. The invention ultraviolet radiation curable coating composition comprises a homogeneous blend of (1) polyvinyl butyral, (2) vinyl acetate, (3) trimethylolpropane triacrylate and/or pentaerythritol triacrylate, and (4) a photoinitiator.

Ultraviolet curable self-pigmented coating composition

There is disclosed a process for conveniently preparing polymers having pendant ultraviolet polymerizable groups which involves co-reacting a polymer containing the C-X moiety with a monomer having the general formula ##STR1## wherein X is OH or COOH and Y is OH when X is OH, and OR'OH when X is COOH, wherein R is hydrogen or methyl and R' is C.sub.1 -C.sub.6 alkyl. This process is carried out utilizing a partially solubilized hydrocarbon fraction as the azeotroping medium.

Preparation of acrylated or methacrylated polymers utilizing a partially

The use of terminal trichlorinated, brominated or iodinated hydrocarbons as co-photoinitiators in combination with standard photoinitiators in ultraviolet curable coating compositions is disclosed.

Trihalogenated hydrocarbons as co-photoinitiators

An ultraviolet curable coating composition having improved clarity and resin compatability is prepared by co-reacting an acrylate or methacrylate co-polymer containing hydroxy and carboxy groups with added polyol and maleic anhydride to form an unsaturated polyester, and then blending the unsaturated polyester with polyunsaturated monomers, monounsaturated monomers and a photoinitiator, all of which will cure when exposed to ultraviolet radiation.

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Clifton, NJ, United States of America

Charles B Rybny