| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiation-curable resin composition which has characteristics suitable as a clad material for polymer clad optical fibers, and has especially a low refractive index, stable transparency, good coatability, and excellent strength, flexibility and adhesiveness to core layers. SOLUTION: This radiation-curable resin composition comprises (A) 20 to 65 mass% of an ethylenically unsaturated group-containing fluorocopolymer, (B) 20 to 60 mass% of a compound represented by formula: CH<SB>2</SB>=CR<SP>8</SP>COO(CH<SB>2</SB>)<SB>x</SB>(CF<SB>2</SB>)<SB>y</SB>X [wherein, R<SP>8</SP>is H or methyl; X is H or F; (x) is 1 or 2; (y) is 2 to 8], and (C) 10 to 35 mass% of a compound not having an aromatic structure and a polar group and having two or more ethylenically unsaturated groups except the components (A) and (B), wherein the total amount of the composition is 100 mass%. COPYRIGHT: (C)2008,JPO&INPIT |
