Hydraulic silicone crumb with improved heat stability

Details Hydraulic silicone crumb with improved heat stability Hydraulic silicone crumb with improved heat stability

1986-12-19

1988-02-02

Marquis, Melvyn I.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524267, 524394, 524398, 524588, 524730, 524731, 524783, 524862, 525478, 528 15, 528 31, 528 32, C08K 524

Patent

active

047229578

ABSTRACT:
A silicone crumb in a fine particulate form has an extrusion rate of at least 50 grams per minute through an orifice of 0.5 inch diameter under a pressure of 345 kilopascals and compression points of less than 1035 kilopascals. This crumb is made from a vinyl-containing polyorganosiloxane, a silicon-bonded hydrogen containing polysiloxane, a platinum catalyst, and a heat stability additive compound containing zirconium, titanium, or hafnium and organosiloxane. The crumb is useful in hydraulic applications where it is exposed to temperatures above 500.degree. F. for prolonged periods of time.

REFERENCES:
patent: 3843601 (1974-10-01), Bruner
patent: 4070343 (1978-01-01), Kishimoto et al.
patent: 4122109 (1978-10-01), Halm

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