Organopolysiloxane composition for viscous fluid coupling

Details Organopolysiloxane composition for viscous fluid coupling Organopolysiloxane composition for viscous fluid coupling

1992-12-04

1994-06-07

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524254, 524255, 524588, 524861, 528 10, 528 43, C08K 517, C08G 7704, C08L 8304

Patent

active

053190106

ABSTRACT:
The instant invention pertains to viscous fluid coupling organopolysiloxane compositions comprised of (A) at least one organopolysiloxane fluid that has the general formula R.sup.1.sub.a R.sup.2.sub.b SiO.sub.[4-(a+b)]/2 wherein R.sup.1 is an alkyl group, R.sup.2 is an aryl group, a+b has the value of 1.95 to 2.05, and b/(a+b) has the value of 0.05 to 0.30; and (B) 0.01 to 5 weight parts by weight per 100 parts by weight of component (A) of a compound with the general formula ##STR1## wherein each R.sup.3 is independently selected from an alkyl group and C has the value of 0 to 2. The viscous fluid coupling organopolysiloxane compositions of the instant invention are capable of withstanding long-term use and under high-temperature, high-shear conditions with little increase or decrease in viscosity and almost no torque fluctuation.

REFERENCES:
patent: 3432460 (1969-03-01), Spacht
patent: 4637889 (1987-01-01), Kishimoto et al.
patent: 4801642 (1989-01-01), Janik et al.
patent: 5118735 (1992-06-01), Burnier
patent: 5171482 (1992-12-01), Asai
Chemical Abstracts, vol. 85 No. 1 Jul. 5, 1976 Abstract No. 6558q.
Abstract JP 62283194; Shin-Etsu Chemical Co. Ltd. Dec. 9, 1987.

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