Acrylated polyurethanes based on polyoxytetramethylene glycol ch

Details Acrylated polyurethanes based on polyoxytetramethylene glycol ch Acrylated polyurethanes based on polyoxytetramethylene glycol ch

1988-01-04

1988-11-01

Welsh, Maurice J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

525242, 525279, 525298, 526263, 526301, 528 66, C08G 1804

Patent

active

047821299

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. 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, this modified diol being the diester reaction product of polyoxytetramethylene glycol having a molecular weight of from about 200 to about 2000 with a stoichiometric deficiency of a long chain ester-forming hydrocarbon-substituted dicarboxylic acid or ester-forming substitution product thereof. This provides a higher molecular weight polyoxytetramethylene glycol which includes ester groups and a long chain hydrocarbon substituent to improve microbending resistance while taking advantage of the better water resistance provided by the polyoxytetramethylene glycol component.

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

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