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Preparation method of borate-type brake fluid

A boric acid ester and brake fluid technology, applied in the petroleum industry, additives, lubricating compositions, etc., can solve the problems of poor water resistance, easy hydrolysis, heavy odor, etc., achieve good water compatibility, suitable for high and low temperature The effect of high viscosity and purity

Inactive Publication Date: 2017-05-17
唐林元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is: Aiming at the problems of easy hydrolysis, darker color, heavy odor and poor water resistance of traditional borate brake fluid, a preparation of borate brake fluid is provided. The method, in the present invention, 1,2-propanediol and thionyl chloride are subjected to lipidation and amide reaction in the environment of linseed oil, and the reactant is opened with dimethylamine and pyrazole under the action of sodium hydride. ring and other reactions to form ketoxime compounds, which increase the amino group and hydroxyl group, and then combine with the platinum ion in the platinum nitrate solution in an alkaline environment to form a steric hindrance group of the platinum complex, and then use propanol , propylene oxide and boric acid as raw materials to prepare boric acid esters, use sodium acid pyrophosphate as a chelating agent, and combine the steric hindrance group of the platinum complex with boric acid esters to increase the space of boric acid esters Steric hindrance, resists the attack of water molecules, increases water resistance, is not easy to hydrolyze, and finally mixes with thinner triethylene glycol methyl ether and other additives to obtain borate-type brake fluid

Method used

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Examples

Experimental program
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Effect test

example 1

[0018]Take 1,2-propanediol and put it into a three-necked flask equipped with a stirrer, a reflux condenser and a dropping funnel, place the three-necked flask in a water bath, use nitrogen protection, and then add 1,2-propanediol twice the volume The mixed solution was added dropwise into the three-neck flask at 2 drops / s using a dropping funnel. After the addition was completed, the temperature of the water bath was set at 80°C, and the reaction was stirred at 110 r / min for 2 hours; the mixed solution was thionyl chloride and flax The oil is mixed at a volume ratio of 1:1; after the above reaction is completed, the mixture in the three-necked flask is put into a high-pressure reactor, and 20% of the mass of the above-mentioned thionyl chloride is added to pyrazole and the mass of the above-mentioned thionyl chloride 2% sodium hydride, use the mixed gas to discharge the air in the reactor, and raise the pressure to 0.3MPa, set the temperature to 60°C, and stir the reaction at ...

example 2

[0021] Take 1,2-propanediol and put it into a three-necked flask equipped with a stirrer, a reflux condenser and a dropping funnel, place the three-necked flask in a water bath, use nitrogen protection, and then add 1,2-propanediol twice the volume The mixed solution was added dropwise into the three-necked flask at 2 drops / s using the dropping funnel. After the dropwise addition, the temperature of the water bath was set at 85°C, and the reaction was stirred at 110 r / min for 3 hours; the mixed solution was thionyl chloride and flax The oil is mixed at a volume ratio of 1:1; after the above reaction is completed, the mixture in the three-necked flask is put into a high-pressure reactor, and 30% of the mass of the above-mentioned thionyl chloride is added to pyrazole and the mass of the above-mentioned thionyl chloride is added. 4% sodium hydride, use the mixed gas to discharge the air in the reactor, and raise the pressure to 0.6MPa, set the temperature to 65°C, stir and react ...

example 3

[0024] Take 1,2-propanediol and put it into a three-necked flask equipped with a stirrer, a reflux condenser and a dropping funnel, place the three-necked flask in a water bath, use nitrogen protection, and then add 1,2-propanediol twice the volume The mixed solution was added dropwise into the three-neck flask at 2 drops / s using a dropping funnel. After the drop was completed, the temperature of the water bath was set at 83°C, and the reaction was stirred at 110r / min for 3h; the mixed solution was thionyl chloride and flax The oil is mixed at a volume ratio of 1:1; after the above reaction is completed, the mixture in the three-necked flask is put into a high-pressure reactor, and 25% of the mass of the above-mentioned thionyl chloride is added to pyrazole and the mass of the above-mentioned thionyl chloride is added. 3% sodium hydride, use the mixed gas to discharge the air in the reactor, and raise the pressure to 0.4MPa, set the temperature to 63°C, stir and react at 300r / m...

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Abstract

The invention relates to a preparation method of a borate-type brake fluid, belonging to the technical field of automobile brake fluids. The method comprises the following steps: carrying out esterification and amide reaction on 1,2-propanediol and thionyl chloride in a flaxseed oil environment, and carrying out ring opening and other reactions on the reaction product, dimethylamine and pyrazole under the action of sodium hydride to form ketoximes, thereby increasing amino and hydroxy groups; combining the ketoximes with platinum ions in a platinum nitrate solution in an alkaline environment to form steric hindrance groups of platinum coordination compounds; in the process of preparing borate from propanol, epoxypropane and boric acid, combining the steric hindrance groups of platinum coordination compounds with borate by using sodium acid pyrophosphate as a chelator to increase the steric hindrance of borate, thereby resisting the attack of water molecules and enhancing the water resistance; and mixing with a diluter triethylene glycol methyl ether and other aids, thereby obtaining the borate-type brake fluid. The preparation method solves the problems of high hydrolysis tendency and poor water resistance in the traditional borate-type brake fluid.

Description

technical field [0001] The invention relates to a preparation method of borate-type brake fluid, which belongs to the technical field of automobile brake fluid. Background technique [0002] Automobile brake fluid is the working medium for transmitting pressure in hydraulic transmission, which affects the braking control of automobiles. Since the beginning of the 1930s when automobiles began to use brake fluid, the development of brake fluid has experienced three types, namely castor oil alcohol Type, mineral oil type and synthetic type, alcohol type brake fluid and mineral oil type brake fluid have been eliminated because of their low boiling point and high freezing point, and synthetic brake fluid has just been produced. Alcohol ether synthetic brake fluid has a simple synthesis process and good lubricating performance, but its water resistance is poor, which makes the equilibrium reflux boiling point of the brake fluid itself decrease, and the viscosity at low temperature...

Claims

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Application Information

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IPC IPC(8): C10M141/12C10N40/08C10N30/02
CPCC10M141/12C10M2201/06C10M2201/083C10M2207/022C10M2207/024C10M2207/04C10M2215/042C10M2215/223C10M2227/061C10N2010/02C10N2030/02C10N2040/08
Inventor 唐林元邹玉赵玲玲
Owner 唐林元
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