Ultraviolet curable buffer coatings for optical glass fiber base

Details Ultraviolet curable buffer coatings for optical glass fiber base Ultraviolet curable buffer coatings for optical glass fiber base

1985-05-08

1986-09-02

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...

526301, 560 25, 560125, 560158, C08G 1830

Patent

active

046097180

ABSTRACT:
An ultraviolet curing liquid coating composition is provided which, when cured with ultraviolet light in the presence of an appropriate photoinitiator, provides a buffer coating for optical glass fiber having adequate strength at room or expected elevated temperature and stability at such elevated temperature, a high index of refraction above 1.48, and a low tensile modulus which remains low to resist microbending difficulties down to around -60.degree. C. This coating composition consists essentially of a linear acrylate-terminated polyurethane oligomer including urea groups introduced by the presence in the oligomer of the reaction product with isocyanate functionality of about 30% to about 90% by weight of the acrylate-terminated oligomer of a polyoxyalkylene diamine having a molecular weight in the range of from about 1000 to about 8000 in which the alkylene group contains from 2-4 carbon atoms.

REFERENCES:
patent: 4097439 (1978-06-01), Darling
patent: 4198200 (1980-04-01), Fonda et al.
patent: 4246379 (1981-01-01), Howard
patent: 4254230 (1981-03-01), Howard

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