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Abstract: The compatibility and tribological properties of friction reducers（epoxy oleate, benzotriazole aliphatic amine, inactive sulfurized fatty acid ester, and boride oleic acid ester amides）in polyether (PAG) oil were investigated by four-ball test and MTM2 test machine. The results indicate that three kinds of friction reducers have a good compatibility and tribological properties with PAG, except benzotriazole aliphatic amine and inactive sulfurized fatty acid ester. The addition of amine phosphate has good effects on bearing capacity and the friction reduction for polyether. Great improvement in bearing capacity and friction reduction, friction factor, and traction coefficient of the PAG are observed after addition of amine phosphate.

Key words: friction reducer additives, friction coefficient, bearing capacity, traction coefficient