Modified phenolic resin, preparation process thereof and brake pad cementing agent prepared by using same

A phenolic resin and preparation technology, which is applied in the field of brake pads, can solve the problems such as the insignificant increase in the thermal decomposition temperature of phenolic resin, and achieve the effects of small variation range of friction coefficient, small thermal decay, and excellent high-temperature friction and wear performance

Active Publication Date: 2010-09-22
SHANDONG GOLD PHOENIX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the thermal decomposition temperature of the single modified phenolic resin is not significantly increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] The preparation technology of modified phenolic resin provided by the invention comprises the following steps:

[0040] 1) Add phenol, formaldehyde aqueous solution, tung oil accounting for 10-15% by weight of phenol and dispersant accounting for 0.5-1.5% by weight of phenol into the reaction vessel, and then add 20-45% of the weight of phenol into the reaction vessel Nanoparticles in parts by weight to obtain the first mixed solution. Wherein, the reaction of phenol and formaldehyde aqueous solution obtains the phenolic resin, and the proportion relationship of its weight is the same as the existing one.

[0041] 2) heating the first mixed solution to obtain a second mixed solution.

[0042] 3) Add an alkali solution to the second mixed solution to adjust the pH to 8-9, and control the temperature at 80-105° C.; vacuum dehydration until the viscosity is 2.0-5.0 Pa. seconds, and then cool to form a solid resin to obtain the modified Phenolic Resin.

[0043] Wherein, ...

Embodiment 1

[0051]Get respectively 8 kilograms of brake pad adhesive (this brake pad adhesive is the brake pad adhesive obtained by the above-mentioned process, the following examples are referred to as brake pad adhesive), reinforcing material (the reinforcing material is copper wool, silicate Fiber or its combination, the following examples are referred to as reinforcing material) 18 kilograms, abrasive (abrasive is iron oxide, zircon or its combination, the following examples are referred to as abrasive) 13 kilograms, lubricant (lubricant is graphite, vulcanized Antimony or its combination, hereinafter referred to as lubricant) 15 kilograms, filler (filler is vermiculite, fluorite, barite or its combination, hereinafter referred to as filler) 25 kilograms. After the materials are uniformly mixed in the mixer, the brake pads are obtained by hot pressing forming technology. When the temperature is higher than 400°C, the phenomenon of thermal decay is not obvious, the braking performance ...

Embodiment 2

[0053] Take 12 kg of brake pad adhesive, 30 kg of reinforcing material, 17 kg of abrasive, 25 kg of lubricant, and 50 kg of filler. After the materials are uniformly mixed in the mixer, the brake pads are obtained by hot pressing forming technology. When the temperature is higher than 400°C, the phenomenon of thermal decay is not obvious, the braking performance is stable, the range of friction coefficient is small, Δμ4 mg / Nm, the high temperature friction and wear performance of the brake pad is excellent.

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PUM

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Abstract

The embodiment of the invention discloses a modified phenolic resin. Phenolic resin is modified by adopting tung oil and nano particles, wherein the tung oil accounts for 10-15 wt% of the weight of the phenolic resin, and the nano particles account for 20-45 wt% of the weight of the phenolic resin. The thermal decomposition of the phenolic resin is remarkably increased by comprehensive modification on the phenolic resin, and a brake pad including the phenolic rein has stable braking performance and less heat fading during emergent braking at high speed. The invention also discloses a preparation process of the modified phenolic resin, a brake pad cementing agent, a preparation process thereof, and a brake pad using the brake pad cementing agent as a cementing agent.

Description

technical field [0001] The invention relates to the technical field of brake pads, more specifically, to a brake pad and its adhesive, a preparation process of the adhesive, a modified phenolic resin and a preparation process thereof. Background technique [0002] Phenolic resin is the first synthetic resin to be industrialized in the world, and it has a history of nearly a hundred years so far. Because of its easy-to-obtain raw materials, low price, good molding processability, excellent mechanical properties, flame retardancy and heat resistance, etc. Therefore, it has become an indispensable raw material in the contemporary industrial sector and has been widely used in various industries. However, with the rapid development of industry, the requirements for various machinery have been greatly improved, so higher requirements are placed on the performance of phenolic resins, such as higher thermal decomposition temperature and high enough viscosity. Bonding strength and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08G8/32C08K3/36C08K3/22C09J161/14C09J109/02C09K3/14F16D69/02
Inventor 孙忠义王春雨徐伟
Owner SHANDONG GOLD PHOENIX
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