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US 5,310,493 AGranted
Stabilized brake fluids containing metal borohydride and butylated hydroxytoluenes
AssigneeThe Dow Chemical Company
InventorsCharles M. Olson, Bart R. Burza
Life of this patent
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Abstract
In a composition having one or more glycol-based diluents, one or more lubricants, and one or more inhibitors, the improvement comprising: (A) 0.001 to 1.0 percent by weight of one or more butylated hydroxytoluenes, and (B) 0.001 to 1.0 percent by weight of one or more metal borohydrides.
Claims22
In a composition having from about 50 to 90 percent by volume of one or more diluents of the formula:
- R.sup.2 [O-R].sub.y OR.sup.3
- and R is a diradical alkylene group of from 2 to 4 carbons, R.sup.2 is hydrogen or an alkyl group of from 1 to 6 carbon atoms, R.sup.3 is hydrogen or an alkyl group of from 1 to 6 carbons, and y is an integer of from 1 to 6, from about 5 to 50 percent by volume of one or more polyoxyalkylene glycol lubricants, from about 0.1 to 5.0 percent by weight of one or more inhibitors,
- the improvement comprising:
- (A) 0.001 to 1.0 percent by weight of one or more butylated hydroxytoluenes, and
- (B) 0.001 to 1.0 percent by weight of one or more metal borohydrides.
2 more elements
In a composition having one or more glycol-based diluents of the formula:
- R.sup.2 [O-R].sub.y OR.sup.3
- and R is a diradical alkylene group of from 2 to 4 carbons, R.sup.2 is hydrogen or an alkyl group of from 1 to 6 carbon atoms, R.sup.3 is hydrogen or an alkyl group of from 1 to 6 carbons, and y is an integer of from 1 to 6, one or more polyoxyalkylene glycol lubricants, and one or more inhibitors,
- the improvement comprising:
- (A) 0.001 to 1.0 percent by weight of one or more butylated hydroxytoluenes, and
- (B) 0.001 to 1.0 percent by weight of one or more metal borohydrides.
2 more elements
Dependencies are inferred from the claim text.