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US 2004/0116306 A1Published application
Hydraulic fluids with improved anti-corrosion properties
OwnerBernd Wenderoth, Michael Roida +2inventors
InventorsBernd Wenderoth, Michael Roida, Bayram Aydin, Uwe Fidorra
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Abstract
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.
Claims7
A hydraulic fluid 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 said 1H-1,2,3-triazoles must be greater than 4:1.
Dependencies are inferred from the claim text.