Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Patent
1988-12-12
1990-09-04
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
528 28, 528 38, C08G 7706
Patent
active
049545965
ABSTRACT:
A process for manufacturing an organic silazane polymer which comprises: reacting ammonia with a mixture of organosilicic compounds (I) and (II) wherein R is a methyl group, an ethyl group, or a phenyl group, and R.sub.1 is a hydrogen atom or a vinyl group, and X is a chlorine or a bromine atom; then polymerizing the thus obtained silazane compound in the presence of an alkali catalyst. A process for manufacturing a ceramic fiber which comprises melting, spinning, and rendering the organic silazane polymer infusible and then baking the same is also disclosed, as are improved silazane polymers and ceramic articles made therefrom. ##STR1##
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Takamizawa Minoru
Takeda Yoshifumi
Takeno Tsutomu
Marquis Melvyn I.
Shin-Etsu Chemical Col, Ltd.
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