Desoto, Inc.

Christopher E Fisher

Timothy Edward Bishop

John Monroe Zimmerman

Gerry K Noren

John J Krajewski

Orvid R Cutler, Jr

Clive J Coady

Joseph J Stanton

Donald W Fieder

An ultraviolet curing liquid coating composition which, when cured with ultraviolet light in the presence of an appropriate photoinitiator, provides a coating adapted for the coating of optical glass fiber. This coating composition comprises as the essential component, an acrylate-terminated polyurethane oligomer based on a polyfunctional core which is at least trifunctional and which supports one branch for each functionality in the core. Each of the branches leads to an acrylate-functional terminal group, with there being from about 150 to about 2500 units of molecular weight in each branch between the trifunctional core and the acrylate-functional terminal group. Depending primarily upon the molecular weight of the branches, one can provide coating compositions for buffer coat, single coat or topcoat use.

Ultraviolet curable coatings for optical glass fiber based on a

A liquid ultraviolet-curable coating composition contains at least 45% up to 95% by weight of acrylated polyurethane-based oligomer comprising at least 10%, based on the total weight of polymerizable material, of an acrylated polyurethane-based ultraviolet-curable oligomer in which the oligomer is the reaction product of an organic diisocyanate with an polyepichlorohydrin polyether diol having a number average molecular weight of from about 1,000 to about 15,000, this reaction product being capped at each end thereof with a monohydric acrylate. At least about 5% up to 55% of the composition is a liquid acrylate-functional compound providing the coating composition with coating viscosity.

Urethane acrylates based on polyepichlorohydrin polyether diols and

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LaGrange, IL, United States of America

Christopher E Fisher