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A resin-based friction material for brake pads and its preparation process

A friction material and resin-based technology, applied in the field of friction materials, can solve the problems of low thermal decomposition temperature, high free phenol content, poor compactness of friction plates, etc., and achieves easy operation of the synthesis process route, simple synthesis process route, and friction resistance performance. excellent effect

Inactive Publication Date: 2016-11-30
珠海市正鑫精密机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing friction materials usually include binders, reinforcing materials, friction modifiers, fillers and mixtures. The binders generally use phenolic resins as raw materials. The disadvantages are: poor heat resistance, thermal decomposition temperature Low, not suitable for the production of high-temperature friction plates; low cohesive strength of the resin, resulting in high wear rate of friction products and short service life; poor toughness of the resin, the vehicle will produce noise when braking, and the friction plates are fragile and damaged; free phenol If the content is high, the density of the produced friction disc is poor
This type of friction material can no longer meet market requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: The present invention provides a resin-based friction material for brake pads, which consists of the following parts, all of which are parts by weight:

[0028] 40 parts of phenolic resin;

[0029] 6 parts of tin sulfide;

[0030] 2 parts calcium carbonate;

[0031] 5 parts of aluminum oxide;

[0032] 4 parts of white carbon black;

[0033] 6 parts of polyacrylonitrile fiber;

[0034] Aramid fiber 8 parts.

[0035] The preparation process of the resin-based friction material used for brake pads in the present invention is as follows:

[0036] (1) At room temperature, add 0.8kg of phenol, 2L of dioxane, and 0.5kg of paraformaldehyde to the reactor in turn, stir for 1 hour and then raise the temperature to 80°C. After 4 hours of reaction, pour it into a vacuum distillation device, and decompress Distill off the excess solvent, pour it out and cool it to harden, then grind it into powder with a mill for later use.

[0037] (2) Add the phenolic resin an...

Embodiment 2

[0038] Embodiment 2: The present invention provides a resin-based friction material for brake pads, which consists of the following parts, all of which are parts by weight:

[0039] 50 parts of phenolic resin;

[0040] 10 parts of tin sulfide;

[0041] 4 parts calcium carbonate;

[0042] 8 parts of aluminum oxide;

[0043] White carbon black 5 parts;

[0044] 7 parts of polyacrylonitrile fiber;

[0045] Aramid fiber 10 parts.

[0046] The preparation process of the resin-based friction material used for brake pads in the present invention is as follows:

[0047] (1) At room temperature, add 0.9kg of phenol, 2.5L of dioxane, and 0.6kg of paraformaldehyde to the reactor in sequence, stir for 1.5 hours, then raise the temperature to 90°C, react for 4.5 hours, pour into a vacuum distillation device, The excess solvent was removed by distillation under reduced pressure, poured out, cooled and hardened, and then pulverized by a mill for use.

[0048] (2) Add the phenolic resi...

Embodiment 3

[0049] Embodiment 3: The present invention provides a resin-based friction material for brake pads, which consists of the following parts, all of which are parts by weight:

[0050] 60 parts of phenolic resin;

[0051] 13 parts of tin sulfide;

[0052] 6 parts of calcium carbonate;

[0053] 10 parts of aluminum oxide;

[0054] 6 parts of white carbon black;

[0055] 8 parts of polyacrylonitrile fiber;

[0056] Aramid fiber 12 parts.

[0057] The preparation process of the resin-based friction material used for brake pads in the present invention is as follows:

[0058] (1) At room temperature, add 1 kg of phenol, 3 L of dioxane, and 0.8 kg of paraformaldehyde to the reactor in sequence, stir for 2 hours and then raise the temperature to 100 ° C. After reacting for 5 hours, pour it into a vacuum distillation device and conduct vacuum distillation Remove the excess solvent, pour it out, cool and harden, and grind it with a mill for later use.

[0059] (2) Add the phenolic...

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PUM

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Abstract

The invention discloses a resin-based friction material for a brake block and a preparation process of the resin-based friction material, belonging to the field of materials. The resin-based friction material for the brake block disclosed by the invention takes phenolic resin as a raw material; a plurality of components achieve synergistic effect, so that the resin-based friction material for the brake block disclosed by the invention has the advantages such as good stability, high hardness and excellent friction resistance. The components achieve the synergistic effect, so that the resin-based friction material for the brake block is not only high in hardness, but also relatively good in toughness. The preparation method of the resin-based friction material is simple and convenient in process flow, improved in production efficiency and convenient to operate.

Description

technical field [0001] The present invention relates to a friction material, in particular, to a resin-based friction material for a brake pad for a brake pad. Background technique [0002] In 1897, the world's first brake pad was invented, and it was used in carriages and early cars. Then, in 1909, the first solidified asbestos-based brake pad was invented. In 1968, the world's first semi-metal-based brake pad was invented. Since then, Friction materials began to develop towards non-asbestos. The application of various asbestos substitute fibers such as steel fibers, glass fibers, aramid fibers, and carbon fibers in friction materials has been studied at home and abroad. Although there are many types of reinforcing fibers, none of them can completely replace asbestos in terms of cost and performance. Therefore, research at home and abroad in recent years has gradually shifted from single fibers to hybrid fibers. [0003] The main function of the binder is to tightly bond ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/14C08G8/10
Inventor 王栩
Owner 珠海市正鑫精密机械有限公司