Acrylated polyurethanes based on polyoxytetramethylene glycols e

Details Acrylated polyurethanes based on polyoxytetramethylene glycols e Acrylated polyurethanes based on polyoxytetramethylene glycols e

1988-01-04

1988-12-27

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524718, 525185, 525455, 528 73, 528 75, C08G 1842

Patent

active

047941332

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.

REFERENCES:
patent: 4629287 (1986-12-01), Bishop

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