Preparation method of modified phenolic resin-base friction material

A technology of phenolic resin and friction material, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of heat resistance, poor toughness, brittleness of phenolic resin, etc., and achieve heat resistance and toughness improvement, heat fading Improved effect

Inactive Publication Date: 2013-11-20
南京市荣达树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the weak link in the structure of phenolic resin is that the phenolic hydroxyl group and methylene are easily oxidized, and the heat resistance is affected.
The use of pure phenolic resin as a friction material is far from being able to meet the require

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1:

[0027] Modified phenolic resin composition: the molar ratio of phenol and formaldehyde is 1.5:1.0, and the mass of bismaleimide is 0.7 times the total mass of phenol and formaldehyde.

[0028] The preparation method of the above modified phenolic resin includes the following steps:

[0029] (1) Weigh the raw material components according to the composition ratio, put phenol and formaldehyde into the reaction kettle, stir and mix the two, and heat to 80°C.

[0030] (2) Add the catalyst, keep stirring, and keep the temperature for 5 hours.

[0031] (3) Add the prescribed amount of bismaleimide to the product obtained in step (2), and stir and mix while adding.

[0032] (4) Adjust the temperature to 80°C, keep it warm and react for 2 hours.

[0033] (5) Heat to 130°C for dehydration for 0.5 hours, cool down to below 50°C, and get ready.

[0034] The weight parts of the modified phenolic resin-based friction material composition are: 20 parts of the above modified phenolic ...

Example Embodiment

[0041] Example 2:

[0042] Modified phenolic resin composition: the molar ratio of cresol and butyraldehyde is 1.2:1.0, and the mass of bismaleimide is 0.5 times the total mass of cresol and butyraldehyde.

[0043] The preparation method of the above modified phenolic resin includes the following steps:

[0044] (1) Weigh the raw material components according to the formula, put the cresol and butyraldehyde into the reaction kettle, stir and mix the two, and then heat to 70°C.

[0045] (2) Add the catalyst, keep stirring, keep the temperature and react for 3 hours.

[0046] (3) Add the prescribed amount of bismaleimide to the product obtained in step (2), and stir and mix while adding.

[0047] (4) Adjust the temperature to 80°C, keep it warm and react for 3 hours.

[0048] (5) Heat to 140°C for dehydration for 1 hour, and cool down to below 50°C to obtain.

[0049] The weight parts of the modified phenolic resin-based friction material are: 15 parts of the above-mentioned modified phenoli...

Example Embodiment

[0056] Example 3:

[0057] Modified phenolic resin composition: the molar ratio of bisphenol and acrolein is 1.7:1.0, and the mass of bismaleimide is 1 time of the total mass of bisphenol and acrolein.

[0058] The preparation method of the above modified phenolic resin includes the following steps:

[0059] (1) Weigh the raw material components according to the composition ratio, put the bisphenol and acrolein into the reactor, stir and mix the two, and then heat to 100°C.

[0060] (2) Add the catalyst, keep stirring, keep the temperature and react for 7 hours.

[0061] (3) Add the prescribed amount of bismaleimide to the product obtained in step (2), and stir and mix while adding.

[0062] (4) Adjust the temperature to 80°C, keep it warm and react for 2 hours.

[0063] (5) Heat to 130°C for dehydration for 0.8 hours, and cool down to below 50°C to obtain.

[0064] The weight parts of the modified phenolic resin-based friction material are: 25 parts of the above modified phenolic resin, 3...

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PUM

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Abstract

The invention discloses a preparation method of a modified phenolic resin-base friction material, which comprises the following steps: mixing, hot pressing, heat treatment and grinding to obtain the end product. The modified phenolic resin-base friction material is mainly prepared from 15-25 parts of modified phenolic resin, 25-35 parts of reinforcing material, 5-15 parts of friction regulator and 5-15 parts of filler. Compared with the prior art, the heat resistance and toughness of the modified phenolic resin-base friction material are greatly enhanced, the heat fading is obviously improved, and thus, the modified phenolic resin-base friction material with excellent properties is completely suitable for specific applications.

Description

technical field [0001] The invention relates to a preparation method of a friction material, in particular to a preparation method of a modified phenolic resin-based friction material. The obtained material is widely used in high-tech fields such as automobiles, electronics, aviation, aerospace and national defense industries. Background technique [0002] Friction material is a key component in automobile brakes, clutches and friction transmission devices. As an indispensable material for power transmission and braking deceleration, it is directly related to the reliability and stability of the system operation. It has an important impact on the safety of the car and the comfort of braking. [0003] Due to the easy availability of phenolic resin raw materials, low price, simple production process and equipment, and the product has excellent mechanical properties, heat resistance, cold resistance, electrical insulation, dimensional stability, molding processability, flame re...

Claims

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Application Information

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IPC IPC(8): C08L61/14C08K13/04C08K7/06C08K3/08C08K7/04C08K7/14C08K3/04C08K3/30C08K3/34C08K3/22C08K3/24C08K3/26C08G8/28C09K3/14
Inventor 刘荣春
Owner 南京市荣达树脂有限公司
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