Preparation method of alcohol ether borate brake fluid

Abstract

A preparation method of an alcohol ether borate brake fluid comprises the following steps: adding raw materials to a reaction kettle, stirring the raw materials at a temperature from room temperature to 90 DEG C until all the raw materials are fully dissolved, and filtering the obtained mixture to obtain the brake fluid, wherein the raw materials comprise, by weight, 20-50% of triethylene glycol monomethyl ether borate, 10-45% of polyethylene glycol monobutyl ether borate with the number-average molecular weight of 780, 10-40% of polyethylene glycol monoalkyl ether, 10-40% of polyethylene glycol, 0-15% of triethylene glycol dimethyl ether, 0-3% of an antioxidant, 0-5% of a pH regulator and 0-5% of a corrosion inhibitor. The preparation method disclosed in the invention solves the instability problem of common borate brake liquids, and allows the alcohol ether borate brake fluid to have the advantages of strong air blockage resistance, good low-temperature fluidity, rust prevention, corrosion prevention, good adaptability to rubber members, and excellent thermal stability.

Description

technical field [0001] The invention relates to a preparation method of brake fluid, in particular to a preparation method of alcohol ether borate type brake fluid comprising triethylene glycol monomethyl ether borate and polyethylene glycol monobutyl ether borate. Background technique [0002] Automobile brake fluid is commonly known as brake oil. Adding brake fluid to automobile brakes is based on the famous Pascal's principle: when pressure is applied to the liquid, the pressure transmitted by the liquid in all directions is equal. By applying pressure to the brake fluid of the car, the main pump and the slave pump interact to the piston of the brake pump, and then apply it to the brake shoe (caliper) to achieve car braking. With the rapid development of the automobile industry in the past two decades, the technology of automobile braking systems has also been greatly improved. The use of anti-lock brakes (ABS) and four-wheel braking electronic balance stabilization syste...

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Problems solved by technology

The above patents and some borate brake fluids on the market have the following problems to varying degrees: the selected dialkyl ether contains tert-butyl ether or dibutyl ether, poor water capacity, and large rubber expansion , The boric acid ester in the brake fluid is sensitive to water. When storing or absorbing water, it is easy to precipitate sediment, which brings the hidden danger of unsafe braking.

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