Metallic dithiophosphates and their applications as...

C - Chemistry – Metallurgy – 07 – F

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253/34, 260/386.

C07F 9/173 (2006.01) C07F 9/02 (2006.01) C07F 9/165 (2006.01) C10M 137/10 (2006.01)

Patent

CA 1132997

PRECIS DE LA DIVULGATION: La présente invention concerne de nouveaux dithio- phosphates métalliques de formule: Image où R1 est un radical alcoyle, alcényle, cycloaliphatique, aryle ou hétérocyclique R2 et R3 sont des radicaux alcoyles de préférence en C1-C4. Ils sont obtanus par action de P2S5 sur un monoesteralcool de formule: Image puis par action de l'oxyde de zinc sur l'acide dithiophospho- rique forme. Ces nouveaux dithiophosphates métalliques sont utilisés comme additifs extrême-pression et anti-usure pour huiles lubrifiantes, quantités comprises entre 0,2 et 10 % par rapport au poids d'huiles lubrifiantes.

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