Preceramic polysilazane compositions

Details Preceramic polysilazane compositions Preceramic polysilazane compositions

1991-01-15

1993-05-04

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 88, 501 95, 501 96, 428688, 264 62, 264 65, 524442, C04B 3552, C04B 3556, C04B 3558

Patent

active

052081923

ABSTRACT:
A crosslinkable composition suitable for use as an infiltrant or as a binder for ceramic powders, such as silicon carbide and/or silicon nitride, in a formulation intended to be injection molded or extruded comprises about 40-70% by weight of a low molecular weight polysilazane, about 15-35% by weight of a medium molecular weight polysilazane, and about 5-30% by weight of an unsaturated organic or organosilicon compound containing at least two alkenyl groups. A preferred unsaturated compound is methylvinylcyclosilazane.

REFERENCES:
patent: 4482669 (1984-12-01), Seyferth et al.
patent: 4645807 (1987-02-01), Seyferth et al.
patent: 4650837 (1987-03-01), Seyferth et al.
patent: 4689252 (1987-08-01), Lebrun et al.
patent: 4719273 (1988-01-01), Seyferth et al.
patent: 4835207 (1989-05-01), Semen et al.
patent: 4869854 (1989-09-01), Takeda et al.
patent: 4891340 (1990-01-01), Semen et al.

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