Cationic catalysis process for the treatment of a polysilazane c

Details Cationic catalysis process for the treatment of a polysilazane c Cationic catalysis process for the treatment of a polysilazane c

1988-02-22

1989-08-29

Bleutge, John C.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525474, 528 12, 528 15, 528 19, 528 21, 528 23, 528 25, 528 26, 528 28, C08G 7708, C08G 7706

Patent

active

048618446

ABSTRACT:
A process for the catalytic treatment of a polysilazane containing an average of at least two, preferably at least three, .tbd.SiH groups per molecule with a catalytically effective quantity of a strong inorganic or organic acid catalyst. The other organic radicals in the polysilazane that are bonded to the silicon or nitrogen atoms are hydrocarbon radicals free from alkene or alkyne unsaturations. The polysilazanes treated in this manner can be characterized by good thermal behavior and can be used, in particular, as precursors of ceramic products with a high yield of inorganic products.

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patent: 3187030 (1965-06-01), Boyer et al.
patent: 3853567 (1974-12-01), Verbeek
patent: 4482689 (1984-11-01), Haluska
patent: 4656300 (1987-04-01), Lebrun et al.
patent: 4689252 (1987-08-01), Lebrun et al.
patent: 4689382 (1987-08-01), Lebrun et al.
patent: 4694060 (1987-09-01), Porte et al.
patent: 4722988 (1988-02-01), Porte et al.
Vanderwerf, Acids, Bases and the Chemistry of the Covalent Bond, 1961, p. 71.
EPO Search Report, EP 86 42 0162, dated 9/30/86.

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