Preparation method of borate ester braking fluid with nitrogen-containing hexatomic ring structure

A technology of borate ester and six-membered ring, which is applied in the field of preparation of nitrogen-containing six-membered ring structure borate ester brake fluid, can solve the problems that the hydrolysis ability cannot be significantly improved, has not been achieved, and the coordination ability is not as good as N atoms. , to achieve low and low temperature viscosity, increased steric hindrance, and improved hydrolysis resistance

Inactive Publication Date: 2016-12-07
广东三和控股有限公司
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Problems solved by technology

[0005] In the patent publication number CN102796600A, a method for preparing a high-grade borate type automobile brake fluid, 1,3 glycerol is esterified with borate to obtain a six-membered cyclic propanol propyl ether borate to form an O→B complex position bond, and the coordination ability of the O atom is far inferior to that of the N atom, and the hydrolysis ability cannot be significantly improved; and in the preparation method of a borate-type brake fluid with a nitrogen structure in the publication number CN104152223A, although the nitrogen atom and the boron atom A coordination bond is formed, but a stable six-membered ring structure is not formed, and an amine anti-hydrolysis stabilizer must be added, and its low-temperature kinematic viscosity (-40°C) is 1561mm 2 / s, did not meet the requirements of the national standard GB12981-2012

Method used

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  • Preparation method of borate ester braking fluid with nitrogen-containing hexatomic ring structure

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Embodiment 1

[0030] (1) Mix 129 parts of cyclohexylamine and 122 parts of salicylaldehyde in a heating device equipped with a reflux condenser, react at 100-105°C for 2 hours, and distill off under reduced pressure at a vacuum degree of 0.01-0.05MPa Moisture in the reaction, the product NA is obtained;

[0031] (2) Add 62 parts of boric acid and n-dodecyl alcohol (C 12 h 25 OH) 373 parts, continue heating to 100-110°C in the above-mentioned device for 2-4 hours to react, during the reaction process, the water in the reaction is removed by distillation under reduced pressure at a vacuum degree of 0.01-0.05MPa, and the nitrogen-containing six-membered ring structure is obtained. Borate product NB;

[0032] (3) Preparation of borate brake fluid with nitrogen-containing six-membered ring structure: Add 82 parts of diluent triethylene glycol monobutyl ether, 427 parts of polyethylene glycol ether, corrosion inhibitor benzo 5.4 parts of triazole, 33.5 parts of triethanolamine, 1.96 parts of a...

Embodiment 2

[0034] Steps (1) and (2) are the same as in Example 1, adding 46.2 parts of diluent triethylene glycol monobutyl ether, 235 parts of polyethylene glycol ether, corrosion inhibitor benzotriazole to the above borate product NB 1.2 parts, 7.45 parts of triethanolamine, 3.94 parts of antioxidant dialkylated diphenylamine, 2.0 parts of 2,6-di-tert-butyl-p-cresol, heated to 90-110°C and stirred for 1 hour. ~0.05MPa negative pressure vacuuming, cooling and cooling, filtering to obtain nitrogen-containing six-membered ring structure borate brake fluid.

Embodiment 3

[0036] Steps (1) and (2) are the same as in Example 1, adding 66 parts of diluent triethylene glycol monobutyl ether, 336 parts of polyethylene glycol ether, corrosion inhibitor benzotriazole to the above borate product NB 5.4 parts, 33.5 parts of triethanolamine, 1.96 parts of antioxidant dialkylated diphenylamine, 1.1 parts of 2,6-di-tert-butyl-p-cresol, heated to 90-110°C and stirred for 1 hour. ~0.05MPa negative pressure vacuuming, cooling and cooling, filtering to obtain nitrogen-containing six-membered ring structure borate brake fluid.

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Abstract

The invention discloses a preparation method of borate ester braking fluid with a nitrogen-containing hexatomic ring structure. The braking fluid is prepared from orate ester, a diluent, a corrosion inhibitor and an antioxidant, wherein the borate ester is of the nitrogen-containing hexatomic ring structure and is a product formed by performing esterification reaction on a dehydration product, obtained by reacting cyclohexyl amine with salicylaldehyde, boric acid and normal alcohol with over ten carbon atoms. The preparation method disclosed by the invention has the advantages that a nitrogen atom is introduced into a molecular structure of a product and a stable hexatomic internal ligand is formed; a long carbon chain is introduced into a molecule, triester is formed, and steric hindrance is increased, so that the attack of water molecules is favorably hindered, and further the hydrolysis resistance of the product is improved; the braking fluid prepared by the preparation method disclosed by the invention has higher dry and wet boiling points and proper low-temperature viscosity, and is beneficial to prolonging the service life of an engine.

Description

technical field [0001] The invention relates to the field of brake fluid, in particular to a preparation method of a borate brake fluid with nitrogen-containing six-membered ring structure and strong hydrolysis resistance. Background technique [0002] Motor vehicle brake fluid, also commonly known as automobile brake fluid, is a functional liquid used to transmit pressure in the hydraulic braking system of automobiles, so that the wheel brakes can achieve the braking effect. And so on, its development has gone through several stages. With the development of the modern automobile industry and people's gradual cognition of safety performance, the development of a new generation of synthetic brake fluid with high dry and wet equilibrium reflux boiling point and low low temperature viscosity has become a hot spot in brake fluid research, and among them In addition to the general performance characteristics of ordinary brake fluids, the ester type, especially the borate type br...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10M105/78C07F5/02C10N30/02C10N30/06C10N30/10C10N40/08
CPCC07F5/04C10M105/78C10M169/044C10M2207/026C10M2207/046C10M2209/104C10M2215/042C10M2215/223C10M2227/0615C10N2030/02C10N2030/06C10N2030/10C10N2030/26C10N2040/08
Inventor 陈炳耀杨善杰
Owner 广东三和控股有限公司
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