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US 6,558,569 B1Granted
Low viscosity functional fluids compositions
AssigneeUnion Carbide Chemicals & Plastics Technology Corporation
InventorsTammy Tyler Shannon, Brian Terry Keen, James Leonard Hansen, Pearl Lesley Crossen
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Abstract
Low viscosity functional fluid compositions particularly useful as brake fluids in anti-lock brake systems comprising a borate ester component, an alkoxy glycol component and an additive package which includes a corrosion inhibitor.
Claims14
A functional fluid composition comprising
- (a) from 35 to 70 percent by weight, based on the weight of the total composition, of an alkoxy glycol borate ester having the formula
- [RO(CH2CH2O)n]3—B
- wherein R is methyl, ethyl, propyl or butyl, or mixtures thereof, n is essentially 2 to 4, and n=3 is greater than about 90 percent by weight, based on the total weight of the borate ester component,
- (b) from about 25 to about 65 percent by weight, based on the total weight of the composition of an alkoxy glycol component having the formula
- RO(CH2CH2O)nH
- wherein R is an alkyl group containing 1 to 8 carbon atoms or mixtures thereof, n is essentially 2 to 4, alkoxy glycol in which n=2 is present in an amount of from about 1 to about 88 percent by weight, based on the total weight of the alkoxy glycol component, alkoxy glycol in which n=4 is present in an amount of from about 0 to about 20 percent by weight, based on the total weight of the alkoxy glycol component, and
- (c) from 0.3 to about 10 percent by weight, based on the total weight of the composition of an additive package containing corrosion inhibitors,
- wherein the total of components (a) and (b) in which n=2 is from about 1 to about 45 percent by weight, based on the total weight of the composition and the total of components (a) and (b) in which n=4 is from about 0 to about 10 percent by weight, based on the total weight of the composition.
5 more elements
Dependencies are inferred from the claim text.