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Synthetic friction material suitable for high braking energy and preparation method of synthetic friction material

A friction material and braking energy technology, applied in the field of friction materials, can solve problems such as unfavorable driving safety, friction coefficient decline, unfavorable environmental protection, etc., and achieve the effects of improving thermal stability, reducing high temperature wear, and reducing friction coefficient thermal decline.

Active Publication Date: 2018-08-17
METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, nitrile rubber and partially modified phenolic resin are often used as the synthetic friction material of the adhesive system. Under high braking energy, the friction coefficient declines seriously, which is not conducive to ensuring the safety of driving; at the same time, when using A large amount of copper-containing dust is produced in the process, which is not conducive to environmental protection

Method used

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  • Synthetic friction material suitable for high braking energy and preparation method of synthetic friction material
  • Synthetic friction material suitable for high braking energy and preparation method of synthetic friction material
  • Synthetic friction material suitable for high braking energy and preparation method of synthetic friction material

Examples

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Effect test

Embodiment 1

[0064] Example 1: Preparation of the synthetic friction material of the present invention

[0065] Raw materials: carboxylated nitrile rubber N41 400g, montmorillonite modified phenolic resin 500g, steel fiber 150g, inorganic mineral fiber 450g, iron sulfide 250g, diatomite 400g, foam iron powder 150g, potassium feldspar powder 200g, nano-precipitated barium silicate 2475g, granulated sulfur 5g, stearic acid 7.5g, accelerator CZ 7.5g, zinc oxide 5g;

[0066] Preparation:

[0067] (1) Carboxylated nitrile rubber is mixed with montmorillonite modified phenolic resin, zinc oxide, accelerator CZ, granulated sulfur, and stearic acid, and masticated by an open mill for 6 minutes at a temperature of 30°C;

[0068] (2) Place the material obtained in step (1) for 24h, then mix the material with iron sulfide, diatomaceous earth, steel fiber, inorganic mineral fiber, foam iron powder, potassium feldspar powder, and nano-precipitated barium silicate. The 50E internal mixer of HF Compan...

Embodiment 2

[0075] Example 2: Preparation of the synthetic friction material of the present invention

[0076] Raw materials: carboxylated nitrile rubber N41 500g, montmorillonite modified phenolic resin 450g, steel fiber 175g, inorganic mineral fiber 500g, iron sulfide 350g, diatomite 450g, foam iron powder 150g, potassium feldspar powder 150g, nano-precipitated barium silicate 2250g, granulated sulfur 5g, stearic acid 7.5g, accelerator CZ 7.5g, zinc oxide 5g;

[0077] Preparation:

[0078] (1) Carboxylated nitrile rubber is mixed with montmorillonite modified phenolic resin, zinc oxide, accelerator CZ, granulated sulfur, and stearic acid, and masticated by an open mill for 6 minutes at a temperature of 60°C;

[0079] (2) Place the material obtained in step (1) for 24h, then mix the material with iron sulfide, diatomaceous earth, steel fiber, inorganic mineral fiber, foam iron powder, potassium feldspar powder, and nano-precipitated barium silicate. HF company 50E banbury mixer for b...

Embodiment 3

[0086] Example 3: Preparation of the synthetic friction material of the present invention

[0087]Raw materials: Carboxylated nitrile rubber N41 550g, montmorillonite modified phenolic resin 400g, steel fiber 200g, inorganic mineral fiber 550g, iron sulfide 400g, diatomite 500g, foam iron powder 200g, potassium feldspar powder 200g, nano-precipitated barium silicate 2525g, granulated sulfur 5g, stearic acid 7.5g, accelerator CZ 7.5g, zinc oxide 5g;

[0088] Preparation:

[0089] (1) Carboxylated nitrile rubber is mixed with montmorillonite modified phenolic resin, zinc oxide, accelerator CZ, granulated sulfur, and stearic acid, and masticated by an open mill for 6 minutes at a temperature of 70°C;

[0090] (2) Place the material obtained in step (1) for 24h, then mix the material with iron sulfide, diatomaceous earth, steel fiber, inorganic mineral fiber, foam iron powder, potassium feldspar powder, and nano-precipitated barium silicate. The 50E internal mixer of HF Compan...

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Abstract

The invention provides a synthetic friction material suitable for high braking energy. The synthetic friction material comprises the following components in percentages by mass: 8-11% of carboxylatednitrile rubber, 8-10% of nano montmorillonite modified phenolic resin, 5-8% of an iron sulfide mineral, 8-10% of diatomite, 3-4% of steel fibers, 9-11% of inorganic mineral fibers, 3-4% of foam iron powder, 3-4% of potassium feldspar powder, 40-51% of nano precipitated barium silicate, 0.05-0.15% of granulating sulphur, 0.06-0.20% of stearic acid, 0.06-0.20% of an accelerant CZ, and 0.05-0.15% ofzinc oxide. According to the synthetic friction material provided by the invention, the carboxylated nitrile rubber and the nano montmorillonite modified phenolic resin are used as binders, a synergistic effect of the carboxylated nitrile rubber and the nano montmorillonite modified phenolic resin is fully played, and the heat insulation efficiency and thermal stability of the synthetic friction material are significantly improved.

Description

technical field [0001] The invention belongs to the field of friction materials, and in particular relates to a synthetic friction material suitable for high braking energy and a preparation method thereof. Background technique [0002] The existing straddle-type monorail trains adopt electric control braking and air braking, and the two are used together. The friction properties of synthetic brake pads and brake discs determine the safety and braking energy efficiency of monorail trains. Under normal braking conditions, the electronic control braking and air-based braking are used together, requiring high parking accuracy and comfort during the braking process. In the case of emergency braking, the train can be kept within a safe distance. parking. However, the existing monorail train has a large slope and high braking energy. At the same time, due to the special structure and size of the monorail brake pad, which is different from the size stipulated in the UIC541-3 and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L13/00C08L61/06C08K13/04C08K3/34C08K3/30C08K7/26C08K7/04C09K3/14
CPCC08K2003/3009C08K2201/003C08K2201/004C08K2201/011C08K2201/014C08L13/00C08L61/06C08L2201/08C09K3/149C08K13/04C08K3/346C08K3/30C08K7/26C08K7/04
Inventor 张国文张静贺春江裴顶峰吴智强靳明旭
Owner METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI
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