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US 4,543,199 AGranted
Water base hydraulic fluid
AssigneeTexaco Inc.
InventorsLawrence F. Kuntschik, Claudia L. Dowe
Life of this patent
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Abstract
A water base hydraulic fluid is disclosed. The fluid comprises 40 wt % of an amphoteric surfactant of the formula: ##STR1## wherein R is a mixture C.sub.12 alkyl groups and 10 wt % polypropylene glycol in water. The diluted hydraulic fluid is noted for its good wear characteristics, anticorrosiveness and non foaming nature.
Claims10
A water base fluid composition comprising:
- (a) 35 to 45 wt % of an amphoteric surfactant of the formula:
- ##STR6## wherein R is a C.sub.12 alkyl group;
- (b) a minor amount of polypropylene glycol of molecular weight 200 to 600;
- and
- (c) water.
2 more elements
A water base fluid composition comprising:
- (a) 35 to 45 wt % of an amphoteric surfactant of the formula:
- ##STR7## wherein R is a C.sub.12 alkyl group;
- (b) 5 to 15 wt % polypropylene glycol of molecular weight 200 to 600;
- and
- (c) water.
2 more elements
A concentrated hydraulic fluid comprising:
- (a) 35 to 45 wt % of an amphoteric surfactant of the formula:
- ##STR8## wherein R is a C.sub.12 alkyl group;
- (b) 8 to 12 wt % polypropylene glycol of molecular weight 200 to 600;
- (c) triethanolamine, diethanolamine and modified phosphate ester in an amount sufficient to inhibit rust;
- (d) phosphoric acid in an amount sufficient to inhibit aluminum corrosion;
- (e) benzotriazole in an amount sufficient to inhibit copper corrosion;
- and
- (f) water.
5 more elements
A hydraulic fluid comprising:
- (a) 40 wt % of an amphoteric surfactant of the formula:
- ##STR9## wherein R is a C.sub.12 alkyl group;
- (b) 10 wt % polypropylene glycol of molecular weight 400;
- (c) 10 wt % triethanolamine;
- (d) 5 wt % diethanolamine;
- (e) 4 wt % modified phosphate ester;
- (f) 1 wt %, 85% phosphoric acid;
- (g) 1 wt % benzotriazole;
- and
- (h) water.
7 more elements
Dependencies are inferred from the claim text.