Continuous inorganic fibers and process for production thereof

Details Continuous inorganic fibers and process for production thereof Continuous inorganic fibers and process for production thereof

D - Textiles, Paper

01

F

18/576

D01F 9/08 (2006.01) C01B 31/36 (2006.01) C03C 13/00 (2006.01) C04B 35/571 (2006.01) C04B 35/622 (2006.01) C08G 77/42 (2006.01) C08G 77/60 (2006.01) C08G 79/00 (2006.01) C08G 81/00 (2006.01) D01F 9/10 (2006.01)

Patent

CA 1142721

ABSTRACT OF THE DISCLOSURE: Continuous inorganic fibers consisting sub- stantially of Si, Ti and C and optionally of 0, said fibers being composed of (1) an amorphous material con- sisting substantially of Si, Ti and C and optionally of 0, or (2) an aggregate consisting substantially of ultra- fine crystalline particles of .beta.-SiC, TiC, a solid solu- tion of .beta.-SiC and TiC and TiCl-x wherein 0<x<1 and having a particle diameter of not more than 500 .ANG., in which amorphous SiO2 and TiO2 sometimes exist in the neighborhood of these ultrafine crystalline particles, or (3) a mixture of said amorphous material (1) and said aggregate (2) of ultrafine crystalline particles. The aforesaid continuous inorganic fibers can be produced by the following steps: a first step of preparing a semi- inorganic block copolymer comprising polycarbosilane blocks having a main chain skeleton composed mainly of carbosilane units of the formula ?Si-CU2?, each silicon atom of said carbosilane units having bonded thereto a side-chain group selected from the class consisting of hydrogen, lower alkyl and phenyl, and titanoxane units of the formula ?Ti-O?; a second step of preparing a spinning dope of said semi-inorganic block copolymer; a third step of subjecting the resulting fibers to a treatment of rendering them infusible under tension or under no tension; and a fourth step of firing the in- fusible fibers at a temperature of 800 to 1800°C in vacuum or in an atmosphere of an inert gas or a reducing gas.

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