Borate type automobile brake fluid

Abstract

The invention discloses a borate type automobile brake fluid. The borate type automobile brake fluid is prepared from the following components in percentage by mass: 0 to 15 percent of polyethylene glycol ether composition, 80 to 97 percent of triethylene glycol methyl ether borate, 0.02 to 0.15 percent of 6-methyl-2-mercaptobenzothiazole, 0.02 to 0.15 percent of methyl benzotriazole, 0.05 to 0.20percent of antioxidant BHT, 0.01 to 0.20 percent of acrylic acid-2-ethylhexyl ester, 0.01 to 0.05 percent of 4,4'-butylenebis(6-tert-butylm-cresol). 0.05 to 0.5 percent of 2,2-[methyl-1H-benzotriazole-1-yl]methyl]imino]diethanol, 0.001 to 0.05 percent of nipagin ester and 0.3 to 1.0 percent of alkalinity regulator, wherein the polyethylene glycol ether composition is one or a combination of polyethylene glycol monomethyl ether and polyethylene glycol monobutyl ether. The brake fluid disclosed by the invention meets the requirement of higher dry-wet boiling point, and has excellent low-temperature driving performance, thereby making braking more sensitive and driving safe.

Description

Technical field [0001] The invention relates to the technical field of brake fluids for automobile brake systems, in particular to a borate type automobile brake fluid. Background technique [0002] Since the 1970s, a new generation of synthetic brake fluids with higher dry and wet boiling points, lower low-temperature kinematic viscosity and low water sensitivity have become a research focus in various countries. Subsequently, automobile brake fluids have been extensively developed. At present, the mainstream products in the world are DOT4 and DOT5.1 brake fluids with alcohol ether borate as the main raw material, and the newly launched DOT6 brake fluid. DOT4 borate type synthetic brake fluids are already in the world It has been widely used. The use of DOT5.1 type brake fluid is less, the main reason is its higher price. For DOT6 brake fluid, its cost is controllable, and its low temperature performance is more excellent, which can be widely used. To meet the needs of ABS brak...

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Problems solved by technology

[0005] Chinese patent CN 03111223.4 relates to a motor vehicle brake fluid and its production method, and discloses a method of producing brake fluid from a polymer mixture produced by diethylene glycol and 1,1-dichloroethane under the action of a catalyst. method, but the DOT4 brake fluid technical indicators described in the patent can only meet the general standard requirements, and there is still a big gap from the technical indicators of the super DOT4 brake fluid and DOT5.1 brake fluid required by some automobile manufacturers. Its low-temperature kinematic viscosity at -40°C reaches 1217mm 2 /s, it cannot meet the requirement of DOT5.1 brake fluid ≤900mm 2 /s technical requirements, let alone meet the requirements of DOT6 ≤750mm 2 The specification of /s requires a

[0006] Chinese patent CN201611072418.9 relates to a brake fluid, which includes the following raw materials in mass percentage: 40% to 50% of deionized water, 38% to 55% of antifreeze, 0.5% to 1.5% of stabilizer, and 1.5% of antioxidant % to 3%, preservative 1% to 4%, passivator 2% to 3.5%, the brake fluid of the present invention effectively reduces the temperature rise of the brake fluid, and weakens electrochemical corrosion, effectively meeting the requirements of large Energy-level brakes have strict requirements on the performance of brake fluid, but the brake fluid described in the brake fluid technology of this invention is

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