Boron/nitrogen preceramic polymers and boron nitride ceramic mat

Details Boron/nitrogen preceramic polymers and boron nitride ceramic mat Boron/nitrogen preceramic polymers and boron nitride ceramic mat

1991-01-22

1992-06-02

Marquis, Melvyn I.

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

Synthetic resins

From boron reactant having at least one boron to hydrogen or...

528 5, 556402, 556403, C08G 7908

Patent

active

051187744

ABSTRACT:
Crosslinked random boron
itrogen preceramic polymers are prepared by reacting (a) admixture of a trihalogenoborane A and a cyclic boron
itrogen compound B containing recurring structural units of the following general formula (1): ##STR1## in which A is a halogen atom and R is a hydrogen atom, or a hydrocarbyl, organosilyl or hydrogenoorganosilyl radical, with (b) an amino compound C containing at least one --NH.sub.2 group; the resulting polymers are facilely pyrolyzed into boron nitride ceramic materials.

REFERENCES:
patent: 4581468 (1986-04-01), Paciorek et al.
patent: 4707556 (1987-11-01), Paciorek et al.
patent: 4939222 (1990-07-01), Mignani et al.
patent: 5068154 (1991-11-01), Mignani et al.

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