A kind of composite salt binder composite friction material and preparation method thereof

A composite friction material and adhesive technology, which is applied in the direction of friction linings, chemical instruments and methods, mechanical equipment, etc., can solve problems such as thermal decay, achieve good flame retardancy, low curing shrinkage, and improve safety Effect

Active Publication Date: 2020-07-28
大连理工(营口)新材料工程中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a binder with high bonding strength, good mechanical properties and high temperature resistance, which can replace the traditional resin binder as a friction material binder, thereby improving the stability of the friction coefficient of the friction material in the middle and high temperature areas, Solve the problem of thermal degradation of materials

Method used

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  • A kind of composite salt binder composite friction material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 10 parts of potassium water glass with the same modulus and Baume degree to 100 parts of sodium water glass with a modulus of 2.8 and a Baume degree of 45, mix and stir evenly to obtain silicic acid with a Na / K ratio of 10 / 1 salt binder.

[0028] Weigh 20 parts of silicate binder with a silicate Na / K ratio of 10 / 1, add 10 parts of liquid aluminum dihydrogen phosphate, 2.5 parts of calcium fluoride additive, mix and stir evenly, at 25~50℃ Heated and stirred for 10 minutes to obtain a compound salt binder.

[0029] Weigh 3 parts of sodium fluorosilicate, 2 parts of copper oxide, 12.5 parts of carbon fiber, 12.5 parts of barite, 5 parts of alumina, 3 parts of silicon carbide, 2 parts of copper powder, 2 parts of graphite, 2 parts of boron carbide and mix and stir for 2 Minutes, then weigh 12.5 parts of nitrile rubber as a toughness modifier, introduce and mix and stir for 1 minute; put the mixed powder in a blast drying oven and dry for 3 hours, and after drying, the ...

Embodiment 2

[0031] Add 30 parts of potassium water glass with the same modulus and Baume degree to 100 parts of sodium water glass with a modulus of 2.8 and a Baume degree of 45, mix and stir evenly to obtain silicic acid with a Na / K ratio of 10 / 3 salt binder.

[0032] Weigh 15 parts of silicate binder with a silicate Na / K ratio of 10 / 3, add 10 parts of liquid aluminum dihydrogen phosphate, 4 parts of calcium fluoride additive, mix and stir evenly, at 25~50℃ Heated and stirred for 10 minutes to obtain a compound salt binder.

[0033] Weigh 3 parts of sodium fluorosilicate, 1 part of copper oxide, 1 part of magnesium oxide, 12.5 parts of carbon fiber, 10 parts of barite, 10 parts of wollastonite, 5 parts of alumina, 3 parts of silicon carbide, 2 parts of copper powder, 2 parts of graphite and 2 parts of boron carbide were mixed and stirred for 2 minutes, then 7.5 parts of nitrile rubber was weighed and introduced as a toughness regulator and mixed and stirred for 1 minute; the mixed powde...

Embodiment 3

[0035] Add 50 parts of potassium water glass with the same modulus and Baume degree to 100 parts of sodium water glass with a modulus of 2.8 and a degree of Baume of 45, mix and stir evenly to obtain silicic acid with a Na / K of 10 / 5 salt binder.

[0036] Weigh 15 parts of silicate binder with a silicate Na / K ratio of 10 / 5, add 15 parts of liquid aluminum dihydrogen phosphate, 5 parts of calcium fluoride additive, mix and stir evenly, at 25~50℃ Heated and stirred for 10 minutes to obtain a compound salt binder.

[0037] Weigh 2 parts of sodium fluorosilicate, 2 parts of copper oxide, 1 part of zinc oxide, 12.5 parts of carbon fiber, 10 parts of barite, 5 parts of wollastonite, 5 parts of alumina, 5 parts of silicon carbide, 2 parts of copper powder, 2 parts of graphite and 2 parts of boron carbide were mixed and stirred for 2 minutes, then 10 parts of nitrile rubber was weighed and introduced as a toughness regulator and mixed and stirred for 1 minute; the mixed powder was dri...

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Abstract

The invention discloses a composite salt binder composite friction material and a preparation method thereof. Main components of the composite friction material are composed of a silicate binder, a phosphate binder, additive, a curing agent, a toughness adjusting agent, reinforced fiber, a friction performance adjuster and filler. The silicate binder mainly takes sodium water glass and potash water glass as raw materials. The phosphate binder mainly takes liquid aluminum dihydrogen phosphate as a raw material, and is mixed with calcium fluoride additive to prepare composite type composite saltbinder serving as a friction material binder. According to the composite friction material, a composite inorganic salt solution mixture serves as a binder, the characteristics of good fire resistance, environmentally friendliness, non-toxicity, simple preparation technology and high temperature resistance of the inorganic salt binder are utilized, and a resin binder is replaced. A silicate and phosphate compound has excellent bonding performance to carbon fiber and powdery materials such as barite and aluminum oxide, the stability of friction coefficients of medium-temperature and high-temperature areas is effectively improved, the problem of heat fading of a common resin-based friction material is solved, and the safety of the friction material in actual use is improved.

Description

technical field [0001] The invention relates to a friction material and a preparation method thereof, and is especially suitable for the preparation method of motor vehicle brake pads, machine tool and electrode brakes, clutch linings and some friction materials that need to work at high temperatures. Background technique [0002] Friction materials for automobile braking, commonly known as brake pads, are one of the most important safety components in the automobile braking system, and are related to the safety of the life and property of automobile drivers. The preparation of brake pads is generally made of binders, reinforcing fibers, friction modifiers and fillers, etc., which are uniformly mixed and then hot-pressed and cured. [0003] At present, resin-based friction materials widely used in the market have the advantages of excellent mechanical properties, low noise and low cost. However, since the binder is mainly composed of organic components such as phenolic resin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D69/02C09K3/14
Inventor 周文龙胡嗣卓付雪松陈国清
Owner 大连理工(营口)新材料工程中心有限公司
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