| 摘要 |
PROBLEM TO BE SOLVED: To obtain a fluid composition for a fluid coupling, having an improved viscosity stability, torque stability and gel-preventing property while keeping a rubber compatibility by blending a specific polyorganosiloxane with a specified thiadiazole derivative, thiophosphoric acid ester and a phosphoric acid ester. SOLUTION: This fluid composition for a fluid coupling comprises (A) a polyorganosiloxane having 50-1,000,000mm<2> /s viscosity at 25 deg.C, (B) 0.05-0.15wt.% compound of formula I R<1> and R<2> are each an (un)saturated group or an atom composed of C, H, O, N or S and at least one of R<1> and R<2> is a group of the formula Sx -R3 [R3 is an (un)saturated monofunctional group or an atom composed of C, H, O, N or S; (x) >=1]}, formula II or III based on the amount of the total composition, (C) 0.1-0.3wt.% compound of formula IV (R<4> to R<6> are each a 1-20C hydrocarbon group) and (D) 0.6-0.7wt.% compound of formula V (R<7> to R<9> are R<4> ). |
