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Modified phenolic resin for friction material and preparation method thereof

A technology of friction materials and phenolic resins, applied in chemical instruments and methods, and other chemical processes, can solve the problems of low molecular weight of phenolic resins, low cardanol activity, performance improvement constraints, etc., to achieve simple production equipment and improve heat resistance And toughness, the effect that industrialization is easy

Inactive Publication Date: 2017-12-12
WUHAN YOUFIN FRICTION MATERIAL +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently cardanol-modified phenolic resin has low activity of cardanol, incomplete reaction, low molecular weight of phenolic resin, and performance improvement is restricted

Method used

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  • Modified phenolic resin for friction material and preparation method thereof
  • Modified phenolic resin for friction material and preparation method thereof
  • Modified phenolic resin for friction material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Add 0.01 parts of cardanol, 80 parts of 37% formaldehyde solution, and 1 part of sodium hydroxide in parts by weight, react at a temperature of 50°C for 0.5h, then add 100 parts of phenol in batches, and react for 3 hours. Under MPa, at a temperature of 60° C., dehydration under reduced pressure was performed for 0.5 h. Then add 0.01 parts of barium chloride, 7 parts of boric acid, 5 parts of nano-ZrO modified by dopamine 2 , at a temperature of 100-110°C and a vacuum of 0.05MPa, dehydration reaction under reduced pressure for 2.5h, and the temperature is raised to 150°C to discharge, and then boron and cardanol double-modified phenolic resin can be obtained.

Embodiment 2

[0041] Add 12 parts of cardanol, 105 parts of 37% formaldehyde solution, 1 part of lithium hydroxide, and 1 part of potassium hydroxide in parts by weight, react at 60°C for 1 hour, then add 100 parts of phenol in batches, and react for 1 hour , under a vacuum of 0.03MPa and a temperature of 70°C, dehydration reaction under reduced pressure for 1.2h. Then add 1 part of manganese sulfate, 2 parts of calcium chloride, 15 parts of boric acid, 12 parts of nano ZrO modified by dopamine 2 , at a temperature of 100-110°C and a vacuum of 0.065MPa, perform a dehydration reaction under reduced pressure for 1 hour, then raise the temperature to 150°C and discharge to obtain boron-cardanol double-modified phenolic resin.

Embodiment 3

[0043] Add 33 parts by weight of cardanol, 156 parts of 37% formaldehyde solution, 2 parts of calcium hydroxide, 4 parts of ammonia water, react at 80 °C for 5 hours, then add 100 parts of phenol in batches, and react for 5 hours , under a vacuum of 0.04MPa and a temperature of 90°C, dehydration reaction under reduced pressure for 1.5h. Then add 1 part of copper sulfate, 6 parts of zinc chloride, 22 parts of boric acid, 8 parts of nano ZrO modified by dopamine 2 , at a temperature of 100-110°C and a vacuum of 0.08MPa, perform a dehydration reaction under reduced pressure for 5 hours, then raise the temperature to 150°C and discharge the material to obtain boron and cardanol double-modified phenolic resin.

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Abstract

The invention discloses a modified phenolic resin for friction materials and a preparation method thereof, belonging to the technical field of modified phenolic resins. The preparation method comprises the following steps: (1) cardanol-formaldehyde reaction: mixing cardanol, catalyst A and formaldehyde , react at a temperature of 50-80°C for 0.5-5h, then add phenol in batches, after reacting for 1-5h, under a vacuum of 0.02-0.04MPa and a temperature of 60-90°C, dehydration under reduced pressure for 0.5-2h; (2) Polymerization reaction: add boric acid, nano ZrO2 and catalyst B to the product obtained in step (1), at a temperature of 100-110°C, a vacuum of 0.05-0.08MPa, dehydration reaction under reduced pressure for 1-5h, and heat up After reaching 120-160°C, the material is discharged to obtain the finished product. The modified phenolic resin prepared by this method is applied to friction materials, which can make the friction materials have excellent thermal properties, mechanical properties and friction properties.

Description

technical field [0001] The invention relates to the technical field of modified phenolic resins, in particular to a modified phenolic resin for friction materials and a preparation method thereof, in particular to a boron / cardanol / nano ZrO used for friction materials 2 Modified phenolic resin and its preparation method. Background technique [0002] As one of the three synthetic thermosetting resins, phenolic resin has the characteristics of easy to obtain raw materials, convenient synthesis, and low price. It has good mechanical properties, weather resistance, corrosion resistance, water resistance, and certain heat resistance. It is widely used and Transportation, aviation industry, military equipment, electronic appliances and other industries. However, with the development of industry, especially technological innovations such as the automobile industry and high-speed trains, new requirements have been put forward for high-performance phenolic resins. Traditional pure ...

Claims

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Application Information

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IPC IPC(8): C08G8/28C08K9/04C08K3/22C09K3/14
Inventor 黄进夏涛王瑾沈家骕刘昌华刘扬石晓敏
Owner WUHAN YOUFIN FRICTION MATERIAL
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