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US 4,233,170 AGranted
Water-glycol hydraulic fluid containing polyoxyalkylene ethers
AssigneeSanyo Chemical Industries, Ltd.
InventorsFumihide Genjida, Toyoaki Nasuno, Hideo Kobayashi, Motohiko Ii
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Abstract
A non-flammable hydraulic fluid comprises a water soluble alkylene oxide adduct of a nitrogen-free polyhydric alcohol having at least five hydroxyl groups, water and a glycol.
Claims20
A non-flammable hydraulic fluid, which comprises:
- 5-30% of a water soluble polymer comprising a polyoxyalkylene ether of a polyhydric alcohol having at least five hydroxyl groups and having no nitrogen atom, 30-60% of water and 15-60% of a glycol;
- wherein said polyoxyalkylene ether has oxalkylene groups comprising both oxyethylene groups and other oxyalkylene groups in random form.
Dependencies are inferred from the claim text.