High-boiling-point high-performance brake fluid composition and preparation method thereof

Abstract

The invention discloses a high-boiling-point high-performance brake fluid composition and a preparation method thereof; and the brake fluid composition comprises boric acid, triethylene glycol butyl ether, a hydroxylamine compound, an organosilicon substance with a hydrophilic and hydrophobic group, an anionic hydroxyl silicone oil emulsion and an azeotropic agent. According to the composition, According to the preparation method, boric acid, triethylene glycol butyl ether and a hydroxylamine compound are used as raw materials, and the hydroxylamine compound can be introduced into the structure of borate after reaction, so that the structure of the borate is more stable and is not easy to hydrolyze, and meanwhile, an organic silicon substance with a hydrophilic and hydrophobic group and ananionic hydroxyl silicone oil emulsion are added; the surface of the composition is coated with the organosilicon substance with hydrophilic and hydrophobic groups and the anionic hydroxyl silicone oil emulsion, external moisture is further prevented from entering the composition, generated moisture is entrained and separated through the entrainer in the reaction process, the moisture in the prepared base solution can be reduced to the maximum extent, and then the use performance of the product is improved.

Description

technical field [0001] The invention relates to the technical field of brake fluid, in particular to a high-boiling high-performance brake fluid composition and a preparation method thereof. Background technique [0002] Automobile brake fluid is a functional liquid used to transmit braking energy in the automobile hydraulic braking system. Its performance and quality are directly related to the driving safety of the vehicle; the brake fluid is composed of base fluid and various additives. As the base fluid is the main direction of high-end and braking. Currently, the disclosed brake fluid uses boric acid ester as the base fluid, such as: the 2009 Chinese patent CN101619258A uses sodium hydroxide as a catalyst, and the reaction is fast, but the polyol ether produced The molecular weight distribution is wide, mono- and dipropanol monoether account for 35% to 45% of the total, and the boiling point of the synthesized boric acid ester is lower than that of only tri- and tetrapr...

AI Technical Summary

Problems solved by technology

However, the polyalcohol ether synthesized by alkaline earth metal catalyst barium hydroxide has a degree of polymerization n≤4, which limits the boiling point range of the brake fluid, and it is impossible to obtain a polyalcohol ether base fluid with a higher degree of polymerization and a higher boiling point.

In addition, the use of alkaline earth metal catalysts requires the use of co-catalysts, an induction period, and low activity. Metal salts are physiologically toxic and their applications are limited.

The recovery cost of toluene-based water-carrying agent is high, and it is easy to cause environmental pollution

In addition, the esterification yield of cyclic boronic esters synthesized by the "one-pot method" is not high, and there are many other chain boronic ester by-products;

[0003] In summary, the existing brake fluids that use borate grease as the base fluid have the following defects: poor air resistance at high temperature; poor corrosion resistance, which will cause serious corrosion to automotive systems; secondly, poor water absorption Strong, there are still problems with hydrolytic stability

Images