Method of preparing polycarbosilanes

Details Method of preparing polycarbosilanes Method of preparing polycarbosilanes

1981-11-05

1983-03-22

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 16, 528 18, 528 24, 528 33, 556430, 556435, C08G 7760

Patent

active

043776779

ABSTRACT:
A method of preparing polycarbosilanes having high molecular weight and also having the major structural unit of silicon-carbon linkage. The method comprises heating a polysilane at 50.degree.-600.degree. C. in atmosphere of an inert gas and distilling out a low molecular weight polycarbosilane fraction having the number mean molecular weight of 300-600, followed by polymerizing the fraction by heating it at 250.degree.-500.degree. C. in atmosphere of an inert gas. The polycarbosilane obtained by the method of the present invention is useful for the precursor of preparing silicon carbide fibres and shaped articles.

REFERENCES:
patent: 4310482 (1982-01-01), Baney
Patents Abstracts of Japan vol. 3, No. 104 (Sep. 4, 1979), p. 76 C 57 which is an abridgement of JP-A-54-83099, Feb./1978.

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