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Silane coupling agent modified artificial graphite resin-based brake pad and manufacturing method thereof

A silane coupling agent, artificial graphite technology, applied in chemical instruments and methods, friction linings, mechanical equipment, etc., can solve the problem of less hydroxyl structure on the surface of graphite, porous adsorption structure easy to adhere to pollute the hub, poor thermal recession stability, etc. It can improve the physical and chemical properties of the surface, facilitate large-scale promotion and application, and achieve the effect of small fluctuation of friction coefficient.

Inactive Publication Date: 2015-05-13
HUNAN BOYUN AUTOMOBILE BRAKE MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the biggest problem encountered by automobile friction materials is the serious thermal recession and poor stability of automobile friction materials at this stage
Especially at high temperature (above 350°C), the brake material of the car wears very seriously. In some downhill processes, due to prolonged braking, the temperature of the brake pads rises sharply. In severe cases, the resin will decompose or even carbonize, resulting in Brakes fail, creating serious safety concerns
[0003] Graphite, as the key raw material in automobile brake pads, mainly plays the role of lubrication, noise reduction and stable friction coefficient. However, due to the lack of hydroxyl structure on the surface of graphite and poor compatibility with the resin matrix, it is easy to fall off during braking, resulting in excessive product wear. , especially at high temperature wear, the wear rate increases exponentially, and the porous adsorption structure of graphite is also easy to adhere and pollute the hub

Method used

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  • Silane coupling agent modified artificial graphite resin-based brake pad and manufacturing method thereof
  • Silane coupling agent modified artificial graphite resin-based brake pad and manufacturing method thereof

Examples

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preparation example Construction

[0029] A preparation method of a silane coupling agent modified artificial graphite resin-based brake pad, characterized in that it comprises the following steps:

[0030] 1) Modification: Use hydrochloric acid to prepare a silane coupling agent solution with a pH of 3-5 and a mass fraction of 3-4%, and stir at room temperature for 40-60 minutes to hydrolyze the silane coupling agent; Add the solution dropwise to the artificial graphite at a mass ratio of 3:10 and stir for 8-10 minutes, then dry at 110-130°C for 150-200 minutes to obtain silane coupling agent-modified artificial graphite;

[0031] Preferably, the specific operation of the modification in step 1) is to prepare a silane coupling agent solution with a pH of 4 and a mass fraction of 3% with hydrochloric acid, and stir for 50 minutes at room temperature to hydrolyze the silane coupling agent; The silane coupling agent solution was added dropwise to the artificial graphite at a mass ratio of 3:10, stirred for 9 minu...

Embodiment 1

[0043] A silane coupling agent modified artificial graphite resin-based brake pad, the material formula of which is by mass percentage: 5% resin / rubber, 25% ceramic / mineral fiber, 1% aramid fiber, 18% potassium titanate whisker, 20% steel fiber, 5% copper fiber, 3% antimony sulfide, 6% artificial graphite, 1% chromite, 1% pyrite, 2% modified alumina, 2% organic friction powder, 1 silane coupling agent %, mineral filler 10%. The modified alumina is silane-modified alumina. The mineral filler is a mixture of cryolite (1%), light bentonite (2%), precipitated barium sulfate (6%), and cyanide (1%).

[0044] A preparation method of a silane coupling agent modified artificial graphite resin-based brake pad, comprising the steps of:

[0045] 1) Modification: Use hydrochloric acid to prepare a silane coupling agent solution with a pH of 3 and a mass fraction of 3%, and stir for 60 minutes at room temperature to hydrolyze the silane coupling agent; prepare the prepared silane coupling...

Embodiment 2

[0052] A silane coupling agent modified artificial graphite resin-based brake pad, the material formula of which is calculated by mass percentage: resin / rubber 12%, ceramic / mineral fiber 10%, aramid fiber 4%, potassium titanate whisker 4% %, steel fiber 10%, copper fiber 5%, antimony sulfide 3%, artificial graphite 16%, chromite 2%, pyrite 5%, modified alumina 8%, organic friction powder 5%, silane coupling Agent 1%, mineral filler 15%. The modified alumina is silane-modified alumina. The mineral filler is a mixture of cryolite (2%), light bentonite (3%), precipitated barium sulfate (8%), and cyanide (2%).

[0053] A preparation method of a silane coupling agent modified artificial graphite resin-based brake pad, comprising the steps of:

[0054] 1) Modification: Use hydrochloric acid to prepare a silane coupling agent solution with a pH of 5 and a mass fraction of 4%, and stir at room temperature for 60 minutes to hydrolyze the silane coupling agent; prepare the prepared si...

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Abstract

The invention discloses a silane coupling agent modified artificial graphite resin-based brake pad and a manufacturing method of the silane coupling agent modified artificial graphite resin-based brake pad. Materials comprise phenolic resin, rubber and organic friction powder, short cut steel fibers, red copper fibers, aramid fibers, high-aluminum ceramic fibers, mineral fibers, silane coupling agents, graphite, composite fillers and the like. The manufacturing method of the silane coupling agent modified artificial graphite resin-based brake pad includes the steps that the silane coupling agents are used for modifying the artificial graphite first, the materials are weighed in sequence and added into a high-speed mixer to be uniformly mixed, pressing and heat curing treatment are conducted according to the dry method one-shot forming method for traditional resin-based friction materials, and finally machining, ceramic treatment and inspecting packaging are carried out. The silane coupling agent modified artificial graphite resin-based brake pad manufactured according to the method has the advantages of being large in braking torque, comfortable and stable in emergency braking, free of obvious degeneration and noise and less in dust fall. The production method is simple and environmentally friendly. The silane coupling agent modified artificial graphite resin-based brake pad is especially suitable for urban bus air disk brakes and has broad market prospects.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a silane coupling agent modified artificial graphite resin-based brake pad and a preparation method thereof. Background technique [0002] With the improvement of living standards, automobiles have become an important means of transportation for people to travel, but the development of automobile friction materials has restricted the improvement of automobile speed and the safety of braking systems to a certain extent. The progress of science and technology has promoted the continuous increase of the speed of the car. The speed increase of the car will cause the problem of high temperature thermal degradation of the brake pads. Improving the thermal degradation performance has become the main direction of brake pad research. At present, the biggest problem encountered by automobile friction materials is the severe thermal recession and poor stability of automobi...

Claims

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Application Information

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IPC IPC(8): F16D69/02C09K3/14
Inventor 唐兵刘伯威刘申飞杨阳涂元满
Owner HUNAN BOYUN AUTOMOBILE BRAKE MATERIALS
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