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A kind of friction-increasing coating on the surface of automobile brake pad and preparation method thereof

A friction-increasing coating and brake pad technology, which is applied in the field of automobile brake pads, can solve the problems of unsuitable drum brake pads, abrasive materials that cannot be removed, and scratches on brake drums, so as to achieve no brake noise and little friction dust , The effect of increasing the deceleration braking torque

Active Publication Date: 2018-11-20
杭州吉成汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When used in drum brakes, due to the nearly airtight working environment of drum brakes, the ground abrasive cannot be removed, which often causes abnormal brake noise and scratches the brake drum
Therefore, although there are several commercially available brake pad surface friction-increasing coatings, most of them are not suitable for drum brake pads.

Method used

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  • A kind of friction-increasing coating on the surface of automobile brake pad and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: A friction-increasing coating on the surface of a car brake pad in this example, its composition and mass percentage are: 200 parts of nitrile latex (PAN-32), 1 part of sodium hexametaphosphate, 5% sodium carboxymethyl cellulose 20 parts, 5 parts of sulfur, 2 parts of zinc oxide, 0.5 parts of accelerator M, 100 parts of light magnesium oxide, 10 parts of α-alumina (below 320 mesh), 200 parts of purified water.

[0024] A preparation method for a surface friction-increasing coating for an automobile brake pad, the steps of which are:

[0025] a. Weigh 200 parts of nitrile latex, add 1 part of sodium hexametaphosphate and 20 parts of 5% sodium carboxymethylcellulose prepared in advance, stir to make the latter fully dissolve;

[0026] b. Add 5 parts of sulfur, 0.5 parts of accelerator M, 2 parts of zinc oxide, 100 parts of light magnesium oxide and 10 parts of α-alumina in sequence during stirring, stir until the powder is fully infiltrated, and then grind ...

Embodiment 2

[0032] Embodiment 2: A friction-increasing coating on the surface of a car brake pad in this example, its composition and mass percentage are: 250 parts of nitrile latex (PAN-26), 2 parts of sodium hexametaphosphate, 5% sodium carboxymethyl cellulose 30 parts, 8 parts of sulfur, 3 parts of zinc oxide, 1 part of accelerator DM, 125 parts of light magnesium oxide, zircon powder (320

[0033] Mesh) 20 parts, purified water 250 parts.

[0034] A preparation method for a surface friction-increasing coating for an automobile brake pad, the steps of which are:

[0035] a. Take by weighing 250 parts of nitrile latex, add 2 parts of sodium hexametaphosphate and 30 parts of 5% sodium carboxymethylcellulose prepared in advance, stir, and make the latter fully dissolve;

[0036] b. During stirring, add 8 parts of sulfur, 1 part of accelerator DM, 3 parts of zinc oxide, 125 parts of light magnesium oxide and 20 parts of zircon powder, stir until the powder is fully infiltrated, and then ...

Embodiment 3

[0042]Embodiment 3: A friction-increasing coating on the surface of a car brake pad in this example, its composition and mass percentage are: 300 parts of nitrile latex (PAN-26), 3 parts of sodium hexametaphosphate, 5% sodium carboxymethyl cellulose 40 parts, 10 parts of sulfur, 5 parts of zinc oxide, 2 parts of accelerator DM, 150 parts of light magnesium oxide, 30 parts of chromite powder (36%Cr), 300 parts of purified water.

[0043] A preparation method for a surface friction-increasing coating for an automobile brake pad, the steps of which are:

[0044] a. Take by weighing 300 parts of nitrile latex, add 1 part of sodium hexametaphosphate and 40 parts of 5% sodium carboxymethylcellulose prepared in advance, stir to make the latter fully dissolve;

[0045] b. Add 10 parts of sulfur, 2 parts of accelerator M, 5 parts of zinc oxide, 150 parts of light magnesium oxide and 30 parts of chromite powder (36%Cr) in turn during stirring, stir until the powder is fully infiltrated...

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Abstract

The invention relates to an automobile brake pad, in particular to a friction-increasing coating on the surface of an automobile brake pad and a preparation method thereof. It mainly solves the technical problems existing in the prior art such as the deceleration and braking of a drum brake vehicle in a new vehicle state, especially insufficient parking torque on a slope. Nitrile latex of the present invention first adds surfactant and sodium hexametaphosphate, 5% sodium carboxymethylcellulose, stirs, and treats that it fully dissolves; Then add sulfur, zinc oxide, accelerator M or accelerator, Light magnesia and abrasive, stir until the powder is fully infiltrated, then use a colloid mill to grind the material to a fine and uniform state; finally add an appropriate amount of pure water to the stirring, and adjust the material to a suitable viscosity of 300-400mPa. s, that is, the friction-increasing coating on the surface of the finished automobile brake pad.

Description

technical field [0001] The invention relates to an automobile brake pad, in particular to a friction-increasing coating on the surface of an automobile brake pad and a preparation method thereof. Background technique [0002] Drum brake is a kind of traditional automobile brake, which is widely used in various types of passenger and trucks (trucks, pickup trucks and cars, etc.). Its working principle is to make the brake shoes close to the wheels through hydraulic or mechanical tension. The inner surface of the brake drum is used to achieve deceleration braking or parking on a slope by friction. Although the current four-wheel disc brake technology has been widely used in middle and high-end cars, the parking brake of most four-wheel disc cars is realized by so-called "drum-in-disc" brakes. The working principle and structure still belong to the category of drum brakes. [0003] Different from disc brakes, the friction surface of drum brakes is arc-shaped, so the running-i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D109/04C09D7/61C09D7/65B01F13/10
CPCC09D7/61C09D7/63C09D7/65C09D109/04B01F33/82C08L1/286C08K13/02C08K3/32C08K2003/2296C08K2003/222C08K2003/2227
Inventor 章景羲
Owner 杭州吉成汽车零部件有限公司
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