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US 6,602,929 B1Granted
Liquid radiation-curable resin composition, optical fiber coating composition, and optical fiber
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsToshio Ohba, Shouhei Kozakai, Kazunori Kondo
Life of this patent
Estimating the term…
Abstract
A liquid radiation-curable resin composition comprising the reaction product obtained by reacting (A) a polyether having a (meth)acryloyl group and a hydroxyl group at opposite ends with (B) a diisocyanate having two isocyanate groups in a molar ratio from 1.8/1 to 2.2/1 has a low viscosity enough to coat on an optical fiber at a high speed. Upon curing, it forms a coating having a minimized water absorption on the optical fiber.
Claims8
A liquid radiation-curable resin composition comprising the reaction product obtained by reacting (A) a polyether of the following general formula (1):
- CH2═CRCOO(CmH2mO)nH (1)
- wherein R is hydrogen or methyl, m is a number of 2 to 6, and n is a number of 6 to 100, (B) a diisocyanate having two isocyanate groups in a molecule, and (C) a (meth)acrylate compound containing a hydroxyl group and having a molecular weight of up to 300, in a molar ratio of (A)/(B)/(C) of (1.8-1.2)/1/(0.8-1.2).
Dependencies are inferred from the claim text.