The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 1988
Filed:
Jan. 04, 1988
Elias P Moschovis, Des Plaines, IL (US);
Joseph J Stanton, Buffalo Grove, IL (US);
Clive J Coady, Hanover Park, IL (US);
DeSoto, Inc., Des Plaines, IL (US);
Abstract
An ultraviolet-curable coating composition adapted for the buffer coating of optical glass fiber consists essentially of an acrylate-capped polyurethane in admixture with at least about 25% of its weight of liquid monoethylenically unsaturated monomer having a low glass transition temperature below about 0.degree. C. and at least about 3% of N-vinyl pyrrolidone based on the weight of the low glass transition temperature monomer. The acrylate-capped polyurethane is based on a generally linear polyurethane which is the reaction product of organic diisocyanate with a stoichiometric deficiency of a modified diol which is the diester reaction product of polyoxytetramethylene glycol having a molecular weight of from about 200 to about 2000 with a stoichiometric deficiency of an ethylenically unsaturated dicarboxylic acid or substitution product thereof, especially fumaric acid, to provide a higher molecular weight polyoxytetramethylene glycol which includes ester groups and copolymerizable ethylenic unsaturation which minimize crystallinity problems.