Boric acid ester brake fluid and its preparing process

A technology of brake fluid and boric acid ester, which is applied in the petroleum industry, base materials, lubricating compositions, etc., can solve the problems of high cost, instability of esterification and hydrolysis, etc., and achieve reduced product cost, good anti-corrosion effect, and improved The effect of market competitiveness

Inactive Publication Date: 2004-11-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a kind of borate brake fluid, overcome the high cost problem and the unstable influence of esterification and hydrolysis of the existing brake fluid because of polyethers and excessive borate esterification, and can Various metals provide excellent corrosion protection, addressing potential unsafe conditions caused by brake fluid hydrolysis

Method used

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  • Boric acid ester brake fluid and its preparing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] use figure 1Diethylene glycol is pumped into the reaction still 1 from the pipeline 6, and then boric acid is added to the reaction still 1 in a ratio of 1:40 to diethylene glycol, the stirring is started, and silica gel or zeolite molecular sieve is added to strengthen the distillation agent . Gradually raise the temperature to 135°C and keep it constant. At the same time, start the vacuum pump through the pipeline 11 and open the condensed water of the reflux condenser 4; adjust the residual pressure in the kettle and the amount of reflux condensed water through the valve to control the temperature at the outlet of the cooling reflux device during the esterification process. higher than 120°C. As the reaction proceeds, gradually increase the vacuum until the residual pressure in the reaction still 1 is maintained at -0.085MPa. When the extract no longer increases at last, close the cooling water of the reflux condenser 4 on the top of the tank, and when the outlet t...

Embodiment 2

[0029] use figure 1 Diethylene glycol is pumped into the reaction still 1 from the pipeline 6, and then boric acid is added to the reaction still 1 in a ratio of 1:55 to diethylene glycol, the stirring is started, and silica gel or zeolite molecular sieve is added to strengthen the distillation agent . Gradually raise the temperature to 128°C and keep it constant. At the same time, start the vacuum pump through the pipeline 11 and open the condensed water in the reflux condenser 4; adjust the residual pressure in the kettle and the amount of reflux condensed water through the valve to control the temperature at the outlet of the cooling reflux device during the esterification process. higher than 120°C. As the reaction proceeds, gradually increase the vacuum until the residual pressure in the reaction still 1 is maintained at -0.095MPa. When the extract no longer increases at last, close the cooling water of the reflux condenser 4 on the top of the tank, and when the outlet ...

Embodiment 3

[0031] use figure 1 Diethylene glycol is pumped into the reaction still 1 from the pipeline 6, and then boric acid is added to the reaction still 1 in a ratio of 1:45 to diethylene glycol, the stirring is started, and silica gel or zeolite molecular sieve is added to strengthen the distillation agent . Gradually raise the temperature to 138°C and keep it constant. At the same time, start the vacuum pump through the pipeline 11 and open the condensed water of the reflux condenser 4; adjust the residual pressure in the kettle and the amount of reflux condensed water through the valve to control the outlet temperature of the cooling reflux device during the esterification reaction. higher than 120°C. As the reaction proceeds, gradually increase the vacuum until the residual pressure in the reaction still 1 is maintained at -0.090MPa. When the extract no longer increases at last, close the cooling water of the reflux condenser 4 on the top of the tank, and when the outlet temper...

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Abstract

The invention relates to a process for preparing boric acid ester brake fluid comprises synthesizing esterification liquid, preparing base liquid, and preparing brake fluid. The process according to the invention can overcome the problem of high cost of the current brake fluid and influence of unstable esterification hydrolysis caused by polyethers and excess boric acid esterification, and can provide fine anti-corrosive protection for various metals.

Description

technical field [0001] The invention relates to an automobile brake fluid technology, in particular to borate type brake fluid. Background technique [0002] With the rapid development of the automobile industry, the relevant state departments have paid great attention to the automobile brake fluid to ensure the braking performance of automobiles. Before the 1990s, alcohol-type brake fluid was mostly used in my country. This alcohol-type brake fluid will produce air resistance when it is less than 100°C. -89 "Technical Conditions for the Use of Automobile Brake Fluid", the brake fluid should be imported from JG 0 to JG 5 Divided into six levels, the brake fluid market will gradually become more formal. In 1998, in view of the new development and demand of the automobile industry, the state revised the old standard and promulgated the new standard GB 10830-1998 "Technical Conditions for the Use of Motor Vehicle Brake Fluid". The implementa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M105/78
Inventor 张腾云钟理
Owner SOUTH CHINA UNIV OF TECH
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