Dihydrocarbyl dithiophosphates

Details Dihydrocarbyl dithiophosphates Dihydrocarbyl dithiophosphates

C - Chemistry, Metallurgy

09

K

31/77, 253/79

C09K 15/32 (2006.01) C07F 9/04 (2006.01) C07F 9/165 (2006.01) C10M 105/74 (2006.01) C10M 137/00 (2006.01) C10M 137/06 (2006.01) C10M 137/10 (2006.01)

Patent

CA 1340717

A mixed zinc/copper dihydrocarbyl dithiophosphate, e.g. of zinc diethyl-hexyl dithiophosphate and cuprous diethyl-hexyl dithiophosphate, is prepared by reacting a dihydrocarbyl dithiophosphoric acid (DDPA) with a mixture of a basic zinc compound eg ZnO, and a basic copper compound eg Cu2O, preferably in the presence of a promoter, eg zinc acetate. The product is a good antioxidant for use in lubricating oils.

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