Synergistic polyether thickeners for water-based hydraulic fluid

Compositions – Electrolytes for electrical devices

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252 493, 252 495, 252 73, 252 74, 252 75, 252 76, 252 52A, 252389R, 252390, 252391, 568624, C09K 300, C10M 304, C10M 306, C10M 316

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043127681

ABSTRACT:
Water-based hydraulic fluids and metalworking lubricants are disclosed which are thickened with a polyether polyol having a molecular weight of about 1000 to about 75,000 modified with an alpha-olefin epoxide having about 12 to about 18 carbon atoms. Unexpectedly, synergistic thickening results from a combination of said polyether polyol with the components of a water-based hydraulic fluid or metalworking lubricant. The particularly effective components of the hydraulic fluid or metalworking lubricant are the phosphate ester and water-soluble amine corrosion inhibitor components. The hydraulic fluid and metalworking fluids of the invention also contain a water-soluble polyoxyethylated ester of an aliphatic acid and a monohydric or polyhydric aliphatic alcohol, either one or both said acid and said alcohol being polyoxyethylated, a sulfurized molybdenum or antimony compound and a metal deactivator as well as other adjuvants conventional in this art.

REFERENCES:
patent: 3249538 (1966-05-01), Freier
patent: 3748276 (1973-07-01), Schmolka
patent: 3933658 (1976-01-01), Beiswanger et al.
patent: 3970569 (1976-07-01), Sturwold et al.
patent: 4138346 (1979-02-01), Nassry et al.
patent: 4151099 (1979-04-01), Nassry et al.

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