Organopolysiloxane composition for viscous fluid coupling

摘要

The instant invention pertains to viscous fluid coupling organopolysiloxane compositions comprised of (A) at least one organopolysiloxane fluid that has the general formula R1aR2bSiO[4-(a+b)]/2 wherein R1 is an alkyl group, R2 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 <IMAGE> wherein each R3 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.