| 摘要 |
PURPOSE:To coat a core without solvents and to entirely eliminate the fiber defects occurring in solvent evaporation by using the addition curing fluorosilicone which has specific cps or below at room temp. and is expressed by specific formula as a clad material. CONSTITUTION:The high-NA optical fiber clad material which consists of the compsn. contg. the following components, has <=10,000cps at room temp and is curable by heat is provided. A. The vinyl group-contg. fluorosilicone expressed by formula (where Vi denotes a vinyl group; Rf denotes a perfluoroalkyl group or perfluoroether group; l, m denote positive integers; n denotes 0 or positive integer and satisfies n/l+m+n<0.02). B. The silicone having average >=2 pieces of silicon-bonded hydrogen in one molecule of the amt. sufficient to cure the above-mentioned compsn. C. The silicone resin, etc., essentially consisting of at least one kind of an RSiO1.5 unit (R is a substd. or unsubstd. univalent satd. or unsatd. group) and SiO2 unit. D. The transition metal catalyst of the amt. sufficient to accelerate the curing of the above-mentioned compsn. |
