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Resin grinding wheel and preparation method thereof

A resin grinding wheel and boric acid phenolic resin technology, applied in the field of grinding wheels, can solve the problems of high brittleness of pure phenolic resin, affecting the performance of friction materials, insufficient heat resistance, etc., achieving less volatile substances, reducing porosity, and improving heat resistance. Effect

Inactive Publication Date: 2016-01-13
WUHU HONGKUN AUTO PARTS
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AI Technical Summary

Problems solved by technology

However, pure phenolic resin has defects such as high brittleness, poor toughness, high hardness, insufficient heat resistance, low strength, and high noise during use, which greatly affect the performance of friction materials. Therefore, modifying phenolic resin is to improve its comprehensive performance. effective method

Method used

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Embodiment Construction

[0019] A kind of resin emery wheel, it is made up of the raw material of following parts by weight:

[0020] CBN abrasive 570, phenol 90, 35% formaldehyde solution 96, boric acid 5, hexamethylenetetramine 2, aniline 13, kaolin powder 47, chlorinated paraffin 18.

[0021] A kind of preparation method of described resin emery wheel, comprises the following steps:

[0022] (1) Mix 68% of the above-mentioned phenol weight and 70% of the 35% formaldehyde solution weight, stir evenly, add sodium hydroxide, adjust the pH to 8, raise the temperature to 70°C, keep stirring for 1.6 hours, add boric acid, and The maximum temperature is 110°C, dehydration under reduced pressure for 50 minutes, add 2% absolute ethanol by weight of the mixed system, stir evenly, first heat at 80°C for 8 hours, then heat at 110°C for 8 hours, and cool to obtain boric acid phenolic resin ;

[0023] (2) Mix the above-mentioned hexamethylenetetramine and boric acid phenolic resin, grind them into fine powder,...

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Abstract

The invention discloses a resin grinding wheel. The resin grinding wheel is composed of the following raw materials in parts by weight: 570-600 parts of CBN grinding material, 90-100 parts of phenol, 96-110 parts of 35-40% formaldehyde solution, 5-7 parts of boric acid, 2-6 parts of hexamethylenetetramine, 13-20 parts of aniline, 47-60 parts of kaolin powder, and 18-20 parts of chlorinated paraffin. According to the grinding wheel disclosed by the invention, the comprehensive performance of the finished product is improved by introducing boron in phenolic resin, due to that phenolic resin is connected with a benzene ring by a C-C bond, boron-containing phenolic resin is connected with a benzene ring by a B-' bond, wherein the bond energy of the C-C bond is 347KJ / mol, and the bond energy of a B-O bond is 523KJ / mol, and far higher than the bond energy of the C-C bond, thus forming a boron-containing three-dimensional cross-linked structure; therefore, the heat resistance, instantaneous high-temperature resistance and ablation resistance of the grinding wheel can be obviously improved.

Description

technical field [0001] The invention relates to the technical field of grinding wheels, in particular to a resin grinding wheel and a preparation method thereof. Background technique [0002] With the continuous improvement of the speed of automobiles and airplanes, the requirements for friction materials such as transmission and braking are more stringent, and the matrix, as an important part of friction materials, has always been the focus of development and research. Phenolic resin, epoxy resin, styrene-butadiene rubber and polytetrafluoroethylene can be used as the matrix of friction materials, but epoxy resin, styrene-butadiene rubber and polytetrafluoroethylene have poor wear resistance, heat resistance and Adhesive properties limit its application in friction materials. The advantages of phenolic resin in heat resistance, bonding performance, mechanical properties, molding performance and cost make it the most commonly used binder matrix material for composite fricti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D3/02B24D3/34B24D18/00C08G8/28
Inventor 黄浩
Owner WUHU HONGKUN AUTO PARTS
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