Sanyo Chemical Industries, Ltd.

Teruyuki Sato

Kunio Kawakatsu

Motohiko Ii

Hydraulic fluid compositions having improved non-corrosive properties to metals are formed from (A) a hydraulic fluid containing a borate ester and (B) an oxyalkylated alicyclic amine.

Hydraulic fluid comprising a borate ester and corrosion inhibiting

Hydraulic fluid compositions having a high boiling point and a boron content of 0.2 to 1.6% by weight are formed from (a) a reaction product of (i) a polyalkylene glycol monoalkyl ether, (ii) a polyalkylene glycol or (iii) a polyoxyalkylene mono- or poly- ol having a molecular weight of 1000 to 5000, with (iv) a boron compound; (b) a polyalkylene glycol monoalkyl ether; (c) a polyalkylene glycol and (d) a polyoxyalkylene mono- or poly- ol having a molecular weight of 1000 to 5000.

Hydraulic fluid compositions comprising borate esters

DOT 4 grade of hydraulic fluid compositions having a stability to hydrolysis is formed from 40 to 65% by weight of a polyglycol monoether, 16 to 45% by weight of a polyglycol and 10 to 19% by weight of a borate ester.

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Kyoto, Japan

Teruyuki Sato