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Calcium carbonate whisker reinforced rubber base friction material and preparation method therefor

A technology of calcium carbonate whiskers and friction materials, applied in friction linings, chemical instruments and methods, mechanical equipment, etc., can solve the problems of unstable friction coefficient, low heat resistance, and high cost, so as to overcome thermal cracks, improve Stable, cost-effective results

Inactive Publication Date: 2015-12-02
GUANGXI UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a calcium carbonate whisker-reinforced rubber-based friction material and a preparation method thereof. The preparation method is a semi-wet production process, which includes technical routes such as compacting, crushing, hot pressing, curing heat treatment, etc., to prepare a new type of calcium carbonate Whisker-reinforced rubber-based friction materials can partially or completely replace organic or inorganic fibers such as aramid fibers and glass fibers in friction materials, and solve the problem of low heat resistance, thermal cracks, and unstable friction coefficients of automotive brake friction materials , the problem of high cost

Method used

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  • Calcium carbonate whisker reinforced rubber base friction material and preparation method therefor
  • Calcium carbonate whisker reinforced rubber base friction material and preparation method therefor

Examples

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Effect test

Embodiment 1

[0033] A calcium carbonate whisker reinforced rubber-based friction material, the content of each component is:

[0034] Nitrile rubber 9kg, styrene-butadiene rubber 3kg, 6224 resin 3kg, 307 resin 4kg, calcium carbonate whisker 5kg, steel fiber 10kg, sepiolite fiber 5kg, mineral fiber 8kg, aramid fiber 2kg, barium sulfate 5kg, magnesium oxide 8.5 kg, alumina 3kg, flake graphite 5kg, carbon black 3kg, petroleum coke 6kg, Cardolite cashew nut shell oil friction powder 3kg, sulfur 0.5kg and vulcanization accelerator 0.75kg.

[0035] Preparation:

[0036] (1) Ingredients: weigh various raw materials with an electronic scale in strict accordance with the above formula requirements;

[0037] (2) Internal mixing: Put the above-mentioned raw materials into a pressurized flip-type internal mixer, and mix for 15 minutes at a speed of 30r / min and a temperature of 80°C, discharge from the discharge port, and cool and dry the discharged materials at room temperature dry to obtain dry mat...

Embodiment 2

[0048] A calcium carbonate whisker reinforced rubber-based friction material, the content of each component is:

[0049] 8kg of nitrile rubber, 7kg of styrene-butadiene rubber, 2kg of 6224 resin, 3kg of 307 resin, 10kg of calcium carbonate whisker, 15kg of steel fiber, 8kg of sepiolite fiber, 1kg of mineral fiber, 6kg of barium sulfate, 5kg of magnesium oxide, 3kg of aluminum oxide, Flake graphite 8kg, carbon black 1kg, petroleum coke 8kg, Cardolite cashew nut shell oil friction powder 4kg, sulfur 0.5kg and vulcanization accelerator 1kg.

[0050] Preparation:

[0051] (1) Ingredients: weigh various raw materials with an electronic scale in strict accordance with the above formula requirements;

[0052] (2) Internal mixing: Put the above-mentioned raw materials into a pressurized flip-type internal mixer, and mix for 15 minutes at a speed of 30r / min and a temperature of 80°C, discharge from the discharge port, and cool and dry the discharged materials at room temperature dry ...

Embodiment 3

[0063] A calcium carbonate whisker reinforced rubber-based friction material, the content of each component is:

[0064] 12kg of nitrile rubber, 6kg of styrene-butadiene rubber, 4kg of 6224 resin, 4kg of 307 resin, 15kg of calcium carbonate whisker, 15kg of steel fiber, 5kg of sepiolite fiber, 6kg of barium sulfate, 10kg of magnesium oxide, 2kg of aluminum oxide, 6kg of flake graphite, Carbon black 5kg, petroleum coke 5kg, Cardolite cashew nut shell oil friction powder 3kg, sulfur 1kg and vulcanization accelerator 0.5kg.

[0065] Preparation:

[0066] (1) Ingredients: weigh various raw materials with an electronic scale in strict accordance with the above formula requirements;

[0067] (2) Internal mixing: Put the above-mentioned raw materials into a pressurized flip-type internal mixer, and mix for 15 minutes at a speed of 30r / min and a temperature of 80°C, discharge from the discharge port, and cool and dry the discharged materials at room temperature dry to obtain dry mat...

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Abstract

The present invention discloses a calcium carbonate whisker reinforced rubber base friction material, and a preparation method therefor. The material comprises: 8-15 parts of nitrile rubber, 10-15 parts of styrene-butadiene rubber, 5-10 parts of phenolic resin, 5-25 parts of calcium carbonate whisker, 10-20 parts of steel fiber, 2-8 parts of sepiolite fiber, 0-8 parts of mineral fiber, 0-3 parts of aramid fiber, 5-8 parts of barium sulfate, 5-10 parts of magnesium oxide, 2-3 parts of aluminum oxide, 5-10 parts of flake graphite, 1-5 parts of carbon black, 5-10 parts of petroleum coke, 3-6 parts of Cardolite cashew nut shell oil friction powder, 0.5-1 parts of sulfur, and 0.5-1 parts of accelerator. The preparation method comprises process steps of such as material collocation, mixing, pressing molding and the like. Brake pads synthesized by the method provided by the invention have the advantages including excellent friction and wear performance, stable braking performance, high heat-resistant property, safe, environmentally-friendly, and low in cost; and is suitable for braking devices for automobiles and motive power machines, thereby achieving a very wide application prospect and applying to industrial production.

Description

technical field [0001] The invention relates to the technical field of transportation materials, in particular to a calcium carbonate whisker-reinforced rubber-based friction material and a preparation method thereof. Background technique [0002] Friction materials are functional accessories used in many sports machinery and equipment for transmission, braking, deceleration, steering, parking, etc. Friction materials are widely used in various means of transportation, such as brake pads and clutch pads of automobiles, trains, airplanes, ships, etc., and various machinery and equipment. Converted to heat and other forms of energy to brake the transmission. Cars are the main means of transportation for people to travel, and the braking materials in the car braking system directly affect the safety performance of the car. The main problems of the automobile brake pads currently used in the market are poor stability of friction coefficient, low heat resistance, and a series o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L9/06C08L61/06C08L77/10C08K13/04C08K7/08C08K7/06C08K7/10C08K7/04C08K3/30C08K3/22C08K3/04C08K3/06B29C43/58C09K3/14C08J5/14F16D69/02
Inventor 廖森尹彩流黄映恒龙琦苇王秀飞朱仁俊文国富
Owner GUANGXI UNIV
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