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Modified phenolic resin and process for preparing the same

A phenolic resin and modification technology, which is applied in the field of modified phenolic resin and its preparation, can solve the problems of nanoparticle agglomeration, insufficient performance of nanomaterials, and limited effect

Inactive Publication Date: 2004-03-17
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
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Problems solved by technology

This process is difficult to uniformly disperse the nanoparticles in the resin. The main reason is that the synthetic resin must be carried out under high temperature and stirring, and the added nanoparticles are easy to agglomerate, so that the performance of the nanomaterials cannot be fully exerted; in addition, These inorganic nanoparticles have limited role in friction materials

Method used

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Embodiment Construction

[0012] The present invention will be described in detail below in conjunction with the examples given by the inventor.

[0013] At present, people's research on the modification of phenolic resin often improves the heat resistance, but the toughness decreases; on the contrary, the toughness is improved, but the heat resistance decreases, that is, it is difficult to improve the heat resistance and toughness of the resin at the same time. Therefore, the demand for resin binders for high-performance friction materials cannot be met. The invention relates to a new nano-material modified phenolic resin and a preparation method, that is, the combined modification of the phenolic resin by nano-copper powder and nano-alumina fiber and its preparation technology.

[0014] The modified phenolic resin of the invention contains 2%-5% of nano copper powder and 1%-3% of nano alumina fiber.

[0015] The synthesis process route of modified resin: add phenol, formaldehyde, caustic soda, compl...

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Abstract

The present invention discloses one kind of modified phenolic resin and its preparation process. Nano copper powder and nano alumina fiber are used to modify phenolic resin in conjunction. The modified phenolic resin contains nano copper powder in 2-5 wt% and nano alumina fiber in 1-3 wt%, so that it has improved heat resistance, toughness and strength. The modified phenolic resin of the present invention is suitable for making high performance friction material products, especially wet friction material products used in the conditions of high-energy completely absorbing and / or low coolingoil circulation. In addition, the present invention provides one new method of synthesizing phenolic resin, that is nano copper catalyzed method, with low power consumption and low cost.

Description

[0001] One must not, the technical field [0002] The invention belongs to material technology and relates to a phenolic resin, in particular to a modified phenolic resin and a preparation method thereof. 2. Background technology [0003] Phenolic resin is the first synthetic resin to be industrialized in the world, and it has a history of nearly a hundred years so far. Because of its easy-to-obtain raw materials, low price, good molding processability, excellent mechanical properties, flame retardancy and heat resistance, etc. Therefore, it has become an indispensable raw material in the contemporary industrial sector, especially in the friction material industry has been widely used. However, with the rapid development of industry, the load capacity and operating speed of various machines have been greatly improved, thus putting forward higher requirements for the performance of friction materials, such as higher thermal decomposition temperature, sufficiently high Frictio...

Claims

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Application Information

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IPC IPC(8): C08K7/08C08L61/06
Inventor 林荣会方亮孙琨岑启宏
Owner XI AN JIAOTONG UNIV
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