WATER-GLYCOL HYDRAULIC FLUID COMPOSITION AND SUPPLEMENTARY ADDITIVE THEREFOR
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United States of America Patent
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May 11, 2023
app pub date -
Apr 1, 2021
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Apr 3, 2020
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Abstract
The present invention provides a water-glycol hydraulic fluid composition comprising an alkanolamine compound according to the general formula (1), wherein the water-glycol hydraulic fluid composition comprises 20-60% by mass water, 20-60% by mass glycol, 0.6-1.2% by mass fatty acid lubricant, and 0.01-0.06% by mass alkaline hydroxide compound selected from potassium hydroxide and/or sodium hydroxide, and has an alkali reserve of 10-25, wherein R1 and R2 are hydrocarbon groups having from 1 to 8 carbon atoms, and R3 is a hydrocarbon group having 2 or more carbon atoms.
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