Hydraulic fluids having improved corrosion protection

Details Hydraulic fluids having improved corrosion protection Hydraulic fluids having improved corrosion protection

C - Chemistry, Metallurgy

10

M

C10M 133/44 (2006.01) C10M 105/78 (2006.01) C10M 107/34 (2006.01) C10M 135/36 (2006.01) C10M 137/02 (2006.01) C10M 137/12 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2442697

Hydraulic fluids, in particular brake fluids for motor vehicles, having improved corrosion protection, comprising (a) from 0.005 to 0.125% by weight of 1H-1,2,4-triazole, and (b) from 0 to 10% by weight of one or more further corrosion inhibitors, where, on concomitant use of 1H-1,2,3- benzotriazole and/or 1H-1,2,3-tolutriazole and/or derivatives thereof, the weight ratio between 1H-1,2,4- triazole and the said 1H-1,2,3-triazoles must be greater than 4:1.

L'invention concerne des liquides hydrauliques, en particulier des liquides de frein pour véhicules, à propriétés anticorrosion méliorées, caractérisés en ce qu'ils renferment (a) 0,005 à 0,125 % en poids de 1H-1, 2, 4-triazole, et (b) 0 à 10 % en poids d'un ou de plusieurs autres inhibiteurs de corrosion, et en ce que lors de l'utilisation conjointe de 1H-1, 2, 3 benzotriazole et/ou de 1H-1, 2, 3-tolyltriazole et/ou de leurs dérivés, le rapport pondéral du 1H-1, 2, 4-triazole aux 1H-1, 2, 3-triazoles précités doit être supérieur à 4 :1.

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