| 摘要 |
PURPOSE: To easily prepare a resin composite having such viscosity that satisfies requirements of coating facilities and coating thickness for core wires, and moreover, to enable production of an optical transmission fiber having a larger aperture and a large diameter by adjusting the polymn. degree and/or amt. of a fluorine-contg. polymer so as to control the viscosity of the resin composite to a desired value. CONSTITUTION: The resin composite for the sheath consists of a fluorine-contg. copolymer of fluorine-contg. (meth)acrylate expressed by formula I and mono(meth)acrylate having one or more substituents of >3 carbon number for ester part. Or, the resin composite for the sheath consists of a fluorine-contg. (meth) acrylate expressed by formula II, mono(meth)acrylate having on or more substituents having >3 carbon number for ester part, and polyfunctional monomers having two (meth)acryloyl groups and contains >30wt.% fluorine atoms. In formula, Rf is a fluorinated aliphatic group having 1-20 carbon number, (n) is an integer 0-6, R is H, CH3 , or F. |
