Optical fiber coated with an organopolysiloxane curable actinic

Details Optical fiber coated with an organopolysiloxane curable actinic Optical fiber coated with an organopolysiloxane curable actinic

1990-03-13

1991-11-05

Lesmes, George F.

Optical waveguides

Having particular optical characteristic modifying chemical...

428375, 428391, 428426, 428429, 522 99, 528 26, 528 32, 427163, 427165, G02B 600

Patent

active

RE0337374

ABSTRACT:
The coated optical fiber of the invention is prepared by providing a coating layer of an ultraviolet-curable organopolysiloxane or a composition comprising the same and irradiating the coating layer with ultraviolet. Specifically, each of the terminal silicon atoms of the organopolysiloxane, which preferably has a linear molecular structure, has two or more ethylenically unsaturated polymerizable groups bonded thereto through an oxygen atom, such as CH.sub.2 .dbd.CHCOOCH.sub.2 CH.sub.2 --, [CH.sub.2 .dbd.C(CH.sub.3)COOCH.sub.2 ].sub.3 C--CH.sub.2 -- and (CH.sub.2 .dbd.CHCOOCH.sub.2).sub.2 C(C.sub.2 H.sub.5)CH.sub.2 --. By virtue of this unique molecular structure of the organopolysiloxane, the coating layer is rapidly cured by ultraviolet irradiation to give a cured coating layer exhibiting very low water absorption and small temperature dependency of the Young's modulus at low temperatures.

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