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High Performance Friction Material And Application Thereof

A friction material, high-performance technology, applied in the field of thermosetting shape memory polymers and recyclable polymers, to achieve good remodeling properties, outstanding heat resistance, good heat resistance

Active Publication Date: 2020-01-14
江苏立一新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, bismaleimide is a thermosetting resin with excellent mechanical properties and heat resistance, and is widely used in aerospace and other fields. Currently, there are few reports on bismaleimide resin-based wear-resistant materials It is used as a modifier (less than the main resin) for the modification of other substances, and it has good practical significance to prepare Shuangma wear-resistant materials with a reasonable process

Method used

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  • High Performance Friction Material And Application Thereof
  • High Performance Friction Material And Application Thereof
  • High Performance Friction Material And Application Thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The preparation method of the high-performance friction material of the present invention is as follows:

[0034] (1) In the presence of quaternary ammonium salt, react 2-allylphenyl glycidyl ether with terephthalic acid to prepare bis(3-(2-allylphenoxy)-2-hydroxypropyl) terephthalates;

[0035] (2) Stir and mix bis(3-(2-allylphenoxy)-2-hydroxypropyl) terephthalate, bismaleimide, zinc compound and filler system to obtain high performance Friction material system; filler system includes epoxy resin, aluminum phosphate and alumina;

[0036] (3) The high-performance friction material system is subjected to hot-press curing and post-treatment to obtain the high-performance friction material.

Synthetic example

[0038] On a mass basis, mix 120g of 2-allylphenol, 140g of sodium hydroxide, 10g of tetrabutylammonium bromide and 230g of tetrahydrofuran, and insulate and react at 35°C for 1.5h under stirring conditions to obtain solution A; Slowly add 270 g of epichlorohydrin dropwise, and keep stirring at 35° C. for 6 hours to react; after the reaction, vacuum rotary evaporation removes tetrahydrofuran and epichlorohydrin to obtain a crude product. The crude product was washed successively with saturated ammonium chloride solution (200 mL×2), deionized water (200 mL×2), and finally separated and purified by chromatography to obtain a yellow transparent liquid, namely 2-allylphenyl Glyceryl ether, the yield is about 93%, its reaction formula and 1 H-NMR see attached figure 1 and 2 . On a mass basis, mix 120g 2-allylphenyl glycidyl ether, 45g terephthalic acid, 10g tetrabutylammonium bromide and 230g acetonitrile, and keep it under stirring for 8 hours at 70°C; after the reaction, The a...

Embodiment 1

[0040] Example 1 Preparation of High Performance Friction Material

[0041]50g N, N'-4,4'-diphenylmethane bismaleimide, 76.17g bis(3-(2-allylphenoxy)-2-hydroxypropyl)terephthalate Mix with 6.29g (22.3mmol) zinc acetylacetonate hydrate and 5.5g filler system, stir and prepolymerize at 130°C for 90min to obtain a prepolymer, take a sample for DSC test; cool the clear prepolymer to room temperature and add 150°C prepolymer In the heated mold, press and post-process according to the following process: 150 ℃ / 1 h / 1MPa+180 ℃ / 2 h / 3MPa+200 ℃ / 1.5 h / 5MPa+220 ℃ / 1.5 h / 5MPa and 240 ℃ / 2 h; demould after natural cooling to obtain a high-performance friction material, and test TG, DMA, oxygen index, and wear resistance.

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Abstract

The invention discloses a high-performance friction material and an application thereof. 2-allyl phenyl glycidyl ether and terephthalic acid are blended in acetonitrile, and esterification reaction takes place under the condition of quaternary ammonium salt as catalyst to obtain bis (3-(2-allyl phenoxy)-2-hydroxypropyl) terephthalate containing reversible dynamic groups; then bis (3-(2-allyl phenoxy)-2-hydroxypropyl) terephthalate is uniformly mixed with bismaleimide, aluminum phosphate and alumina, and cured to prepare high-performance friction materials. The high-performance friction material prepared by the invention not only has good wear resistance, heat resistance and flame retardant performance, but also can realize remodeling under hot pressing conditions and has broad applicationprospects.

Description

technical field [0001] The invention relates to a high-performance friction material and its preparation and remodeling methods, belonging to the fields of thermosetting shape memory polymers and recyclable polymers. Background technique [0002] Thermosetting resins are considered to be moldable only once and cannot be reused. Once the wear-resistant product has defects such as cracks, it can only be scrapped, which will cause serious waste of resources and environmental pollution. In recent years, the developed remodelable thermoset SMPs cannot combine high heat resistance, flame retardancy, and good shape memory properties, and cannot be used as wear-resistant materials. Oxygen index (OI) refers to the minimum oxygen concentration required for a material to burn flamingly in an oxygen-nitrogen mixed flow under specified conditions. It is expressed by the volume percentage of oxygen; a high oxygen index indicates that the material is not easy to burn, and a low oxygen ind...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08L63/00C08K3/32C08K3/22C07C67/26C07C69/82C07D301/28C07D303/23
CPCC07C67/26C07D301/28C07D303/23C08K2003/2227C08K2003/327C08L79/08C08L2201/12C08L63/00C08K3/32C08K3/22C07C69/82
Inventor 梁国正韩建王志龙
Owner 江苏立一新材料科技有限公司