Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF2 Cites 8 Cited by
  • 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 requirements as a base material for luxury cars, motorcycle brake pads and clutch plates.
Traditional unmodified phenolic resins have high brittleness, poor toughness, and insufficient heat resistance, which severely limit the development of high-performance friction materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Modified phenolic resin formula: 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 above-mentioned modified phenolic resin, its preparation comprises the steps:

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

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

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

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

[0033] (5) Heating to 130°C for dehydration for 0.5 hours, cooling down to below 50°C to obtain the product.

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

Embodiment 2

[0042] Modified phenolic resin formula: 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 above-mentioned modified phenolic resin, its preparation comprises the steps:

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

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

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

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

[0048] (5) Heating to 140°C for dehydration for 1 hour, cooling down to below 50°C to obtain the product.

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

Embodiment 3

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

[0058] The preparation method of above-mentioned modified phenolic resin, its preparation comprises the steps:

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

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

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

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

[0063] (5) Heating to 130°C for dehydration for 0.8 hours, cooling down to below 50°C to obtain the product.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com