DOT4 boric acid ester type brake fluid
A technology of brake fluid and borate, which is applied in the field of DOT4 borate brake fluid, can solve the problems of unresolved borate hydrolysis stability, alcohol ether technology is difficult to meet the requirements of the new national standards, etc., to achieve Addresses the effect of long-term storage hydrolytic stability
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[0013] Add successively 44.9 kilograms of triethylene glycol methyl ether, 158 kilograms of tetraethylene glycol methyl ether, 20 kilograms of diethylene glycol, and 750 kilograms of alcohol ether borate (wet balance reflux boiling point) in the reactor of 1.5T : 220°C, -40°C low temperature kinematic viscosity: 1000CST, PH: 5.0), start stirring, and add 2 kg of benzotriazole, 3.5 kg of N-ethylmorpholine, 6 kg every 10 minutes in the following order Bisphenol A, 0.6 kg of dodecyl thiodipropionate, 2 kg of 2.6-di-tert-butyl-4-methylphenol, 4 kg of T746, 1 kg of mercaptobenzothiazole, stirred for 2 hours Finally, add 8 kg of tri-n-butylamine, continue to stir for 4 hours and then filter and pack through a 0.1-0.5um filter.
[0014] The test results of the main technical indicators are as follows (using the special durability test requirements for testing hydrolytic stability):
[0015]
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