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Method for preparing boric acid ester automobile braking fluid with high performance

A technology of automobile brakes and boric acid esters, which is applied in the petroleum industry, additives, lubricating compositions, etc., can solve the problems of unconsidered boric acid hydrolysis stability, insufficient consideration of corrosion resistance, low temperature viscosity increase, etc., to achieve optimization Brake fluid performance, good anti-corrosion effect, stable color effect

Inactive Publication Date: 2014-05-14
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Alcohol ether synthetic brake fluid was successfully developed in the 1950s. The synthesis process is simple and the product has good lubricating performance, but its water resistance is poor, which makes the balance return boiling point of the brake fluid itself drop (the balance return boiling point is the most important brake fluid. The quality index is used to judge the high-temperature air resistance performance of the brake fluid), and the low-temperature viscosity increases
The anticorrosion agent propylene oxide or ammonium sulfonate used did not fully consider the corrosion resistance of various metals, and the formulation did not consider the hydrolytic stability of boric acid

Method used

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  • Method for preparing boric acid ester automobile braking fluid with high performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 60g of propanol, 232g of propylene oxide, and 0.6g of sodium hydroxide into the autoclave, blow nitrogen gas, keep the pressure in the autoclave at 0.4-0.5Mpa, set the temperature of the autoclave at 150°C, heat and stir, and the pressure will reach the highest value with time , and then the pressure drops rapidly. When the pressure drops to about 0.5Mpa, the polymerization is completed. After standing for 1 hour, add lactic acid to adjust the pH value to 7-8, and obtain a clear, transparent, light yellow liquid polypropanol propyl ether;

[0026] Take 64g of methanol, 580g of propylene oxide, and 0.64g of sodium hydroxide and put them into the autoclave, set the temperature of the kettle to 165°C, the method is the same as that of polypropanol propyl ether, and the product obtained is polymethanol propyl ether.

[0027] Take 221g of polypropanol propyl ether and 6.0g of boric acid into a three-neck flask, add the enhanced distillation agent zeolite molecular sieve,...

Embodiment 2

[0031] Take 40g of propanol, 200g of propylene oxide, and 0.40g of sodium hydroxide into the autoclave, blow nitrogen gas, keep the pressure in the autoclave at 0.4-0.5Mpa, set the temperature of the autoclave at 150°C, heat and stir, and the pressure will reach the highest value with time , and then drop rapidly. When the pressure drops to about 0.5Mpa, the polymerization is completed. After standing for 1 hour, add lactic acid to adjust the pH value to 7-8, and obtain a clear, transparent, light yellow liquid polypropanol propyl ether;

[0032] Take 25g of methanol, 250g of propylene oxide, and 0.25g of sodium hydroxide and put them into an autoclave. Set the temperature of the kettle to 165°C. The method is the same as that of polypropanol propyl ether, and the product obtained is polymethanol propyl ether.

[0033] Take 100 g of polypropanol propyl ether and 2.5 g of boric acid into a three-neck flask, add the enhanced distillation agent zeolite molecular sieve, pass coolin...

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Abstract

The invention discloses a method for preparing boric acid ester automobile braking fluid with high performance, which comprises the following three steps: taking propyl alcohol as a raw material to compound polyol ether; compounding esterified fluid; and preparing the braking fluid, wherein the polyol ether compounded by adopting the propyl alcohol as the raw material improves the yield of a main component of braking fluid main body oil; the esterified fluid produced by proper boron content improves the high temperature air resistance and the low temperature mobility of the braking fluid, overcomes the adverse effects brought by low boiling point, incomplete boric acid esterification and unstable hydrolysis of the prior braking fluid and provides the better anticorrosive effect for metal in a brake system.

Description

technical field [0001] The invention relates to a method for preparing automobile brake fluid, in particular to a method for preparing borate-type brake fluid. Background technique [0002] Automobile brake fluid is the working medium for transmitting pressure in hydraulic transmission. Since the beginning of the 1930s when automobiles began to use brake fluid, the development of brake fluid has gone through three types, namely castor oil type, mineral oil type and synthetic type. Alcohol-type brake fluid and mineral oil-type brake fluid have been eliminated due to their low boiling point and high freezing point, and synthetic brake fluid has emerged as the times require. [0003] Alcohol ether synthetic brake fluid was successfully developed in the 1950s. The synthesis process is simple and the product has good lubricating performance, but its water resistance is poor, which makes the balance return boiling point of the brake fluid itself drop (the balance return boiling p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M155/04C10N40/08
Inventor 刘跃进李蕊王世青
Owner XIANGTAN UNIV
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