Extrudable pre-ceramic polycarbosilanes

Details Extrudable pre-ceramic polycarbosilanes Extrudable pre-ceramic polycarbosilanes

1989-11-27

1991-07-02

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 35, C08G 7700

Patent

active

050286781

ABSTRACT:
Extrudable pre-ceramic polycarbosilanes are prepared by intimately contacting a crude polycarbosilane containing a fraction of high molecular weight polymers (e.g., molecular weights greater than about 25,000) with ethyl acetate, whereby selectively dissolving desired extrudable polycarbosilane essentially devoid of such fraction of high molecular weight polymers in the ethyl acetate, and then recovering such dissolved polycarbosilane from the ethyl acetate solvent.

REFERENCES:
patent: 4100233 (1978-07-01), Yajima et al.
patent: 4939197 (1990-07-01), Su

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