| 摘要 |
PURPOSE:To provide the title treating agent capable of significantly improving the wear resistance at high temperatures and flexural resistance of silica fiber, containing, as the active ingredient, at least one kind of substance selected from silane coupling agents, silicone oils, graphite, fluororesins and fluororubbers. CONSTITUTION:The objective surface-treating agent containing as the active ingredient, at least one kind of substance selected from (A) silane coupling agents, (B) silicone oils, (C) graphite, (D) fluororesins, and (E) fluororubbers, esp. A+B, A+B+D, A+B+E etc. Silica fiber is treated with this agent (solution) followed by heat treatment, thereby protecting said fiber from deterioration in the physical properties at high temperatures. Said silane coupling agent is, e.g., a compound of formula I [Y is CH2=CH-, eH2=C(CH2)COO-, etc.; R is CnH2n- (n is 0-4); X is Cl or OR' (R' is alkyl)], while said silicone oil is, e.g., a compound of formula II [R<1>-R<10> are each monovalent hydrocarbon group (alkyl, polyfluoroalkyl such as CF3C2H4-)]. |
