ORGANOPOLYSILANE, SIC FIBER, POROUS SIC CERAMIC, AND PREPARATION OF PROTECTIVE COVERING

摘要

PURPOSE: To provide an organopolysiliane obtained by reacting specific disilanes in the presence of a specific catalyst and suitable for producing SiC-fibers, porous SiC-ceramic and a protective coating. ;CONSTITUTION: A mixture of at least one disilane represented by formula I (wherein R is H or a monovalent saturated org. group, R³ is a monovalent unsaturated org. group, R¹ is a monovalent alkyl, k is 0, 1, 2 or 3, m is 1, 2, 3 or 4 and the sum total of k and m is 4 or less) (e.g.; 1-phenyl-1,2- dimethyltrimethoxydisilane) and, if necessary, a disilane represented by formula II (n is 0, 1, 2 or 3) (e.g.; 1,1,2-trimethyltrimethoxydisilane) is reacted in the presence of a compd. represented by formula III (wherein R² is a monovalent hydrocarbon and M is an alkali metal atom) (e.g.; sodium methylate). SiC-fibers, porous SiC-ceramic and a protective coating are produced from the obtained organopolysilane.;COPYRIGHT: (C)1992,JPO