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

Active Publication Date: 2009-04-29
张家港迪克汽车化学品有限公司
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  • Abstract
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Problems solved by technology

[0003] As far as the existing technology is concerned, borate brake fluid technology has become a necessary technology for high-performance borate brake fluid products, and the pure alcohol ether technology is difficult to meet the new national standards, espe

Method used

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  • DOT4 boric acid ester type brake fluid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[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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PUM

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Abstract

The invention discloses a DOT4 boric acid ester type brake fluid, which comprises the following components in weight percentage: 4.3 to 4.7 percent of triethylene glycol methyl ether, 15 to 17 percent of tetraethylene glycol methyl ether, 1.9 to 2.1 percent of diethylene glycol, 74 to 76 percent of alcohol ether borate, 0.19 to 0.21 percent of benzotriazole, 0.33 to 0.37 percent of N-phenyl morpholine, 0.76 to 0.84 percent of tri-n-butylamine, 0.57 to 0.63 percent of 2, 2-di (4-hydroxyl phenyl) propane (bisphenol A), 0.057 to 0.063 percent of thiodipropionic acid didodecyl alcohol ester, 0.19 to 0.21 percent of 2.6-di-tert-butyl-4-methyl phenol, 0.095 to 0.105 percent of mercapto styrene-acrylic thiazole, and 0.38 to 0.42 percent of dodecatylene butane diacid (T746). The DOT4 boric acid ester type brake fluid has the advantages that the DOT4 boric acid ester type brake fluid can thoroughly solve the problem of hydrolytic stability of boric acid ester for long term storage by using a formulation technology of combining organic substances and additives.

Description

technical field [0001] The invention relates to brake fluid technology of an automobile brake system, in particular to DOT4 borate type brake fluid. Background technique [0002] Brake fluid is the working medium for transmitting pressure in hydraulic transmission, and its performance is directly related to the safety of people's lives and property. Therefore, the country has strict requirements on the quality of automobile brake fluid. With the abolition of JG3 products in the standard [GB12981-1998], the implementation of the new standard [GB12981-2003] has greatly improved the technical indicators of brake fluid products, and fully adopted the brake fluid products commonly used internationally. According to the standard requirements, the replacement of JG3 products has been completed in terms of safety regulations, and advanced brake fluid products such as DOT3 and DOT4, which are more excellent in evaporation loss and metal corrosion resistance, are completely used as th...

Claims

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Application Information

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IPC IPC(8): C10M105/32C10M129/16C10M129/68C10N40/08
Inventor 陶佃彬曹云龙童秀凤
Owner 张家港迪克汽车化学品有限公司
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