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Method for preparing clutch facing through taking water soluble phenol-formaldehyde resin as adhesion agent

A technology of water-soluble phenolic resin and clutch face, which is applied in the field of preparing high-performance motor vehicle clutch face, which can solve the problems of cumbersome preparation process of modified phenolic resin, high price of powdered nitrile rubber, and increased cost, so as to enhance toughness , Improve heat resistance, increase the effect of bonding performance

Active Publication Date: 2013-03-27
浙江科马摩擦材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the patent application whose publication number is CN101655128A, water-soluble phenolic resin is used as a binder, and nitrile rubber is added as a toughening agent in order to improve its brittleness, but powdered nitrile rubber is expensive, resulting in an increase in cost, and a certain amount of Organic reagents dissolve nitrile rubber, thus causing environmental pollution and inconvenient use
In the patent application whose publication number is CN101285512A, a kind of latex modified water-soluble phenolic resin is used as an adhesive for preparing clutch face sheets, but due to the existence of latex, it is necessary to add anti-delamination agents, surfactants and other auxiliary agents to prevent modification. The phenolic resin is delaminated, so the preparation process of the modified phenolic resin is cumbersome and also increases the cost

Method used

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  • Method for preparing clutch facing through taking water soluble phenol-formaldehyde resin as adhesion agent

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Experimental program
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Effect test

Embodiment 1

[0032] In this embodiment, the clutch face uses water-soluble phenolic resin solution as a binder, and its preparation method includes the following steps:

[0033](1) Preparation of water-soluble phenolic resin solution:

[0034] Add 100 parts by mass of phenol, 5 parts by mass of polyvinyl alcohol and 5 parts by mass of NaOH into the reaction vessel, then add 115 parts by mass of formaldehyde solution into the reaction vessel, heat up to 93°C, and stir for 40 minutes to obtain Aqueous solution of polyvinyl alcohol-modified phenolic resin; stop heating, and after the temperature drops below 50°C, add 4 parts by mass of nano-sized attapulgite and 1 part by mass of micron-sized copper powder particles into the reaction vessel, and stir for 25 minutes Stop stirring, collect the reaction solution, place it in an ultrasonic dispersion device, control the temperature at about 40°C, and disperse it by ultrasonic wave at a frequency of 45 Hz for 90 minutes to obtain a water-soluble p...

Embodiment 2

[0043] In this embodiment, the clutch face uses water-soluble phenolic resin solution as a binder, and its preparation method includes the following steps:

[0044] (1) Prepare the first water-soluble phenolic resin solution:

[0045] 100 parts by mass of phenol, 4 parts by mass of polyvinyl alcohol and 8 parts by mass of Ba(OH) 2 Add it into the reaction container, then add 116 parts by mass of formaldehyde solution into the reaction container, raise the temperature to 90°C, stir and react for 45 minutes to obtain an aqueous solution of polyvinyl alcohol-modified phenolic resin; stop heating, and wait until the temperature drops to 50°C After the following, 2 mass parts of nano-scale attapulgite and 1.5 mass parts of micron-sized copper powder particles were added to the reaction vessel, and stirred for 30 minutes; the stirring was stopped, and the reaction solution was collected, placed in an ultrasonic dispersion device, and the temperature was controlled at 45 At about ℃,...

Embodiment 3

[0054] In this embodiment, the clutch face uses water-soluble phenolic resin solution as a binder, and its preparation method includes the following steps:

[0055] (1) Preparation of water-soluble phenolic resin solution:

[0056] Add 100 parts by mass of phenol, 6 parts by mass of polyvinyl alcohol and 6 parts by mass of NaOH into the reaction vessel, then add 112 parts by mass of formaldehyde solution into the reaction vessel, raise the temperature to 95°C, and stir the reaction for 48 minutes to obtain Aqueous solution of polyvinyl alcohol-modified phenolic resin; stop heating, and after the temperature drops below 50°C, add 3 parts by mass of nano-sized attapulgite and 1.5 parts by mass of micron-sized copper powder particles into the reaction vessel, and stir for 25 minutes Stop stirring, collect the reaction solution, place it in an ultrasonic dispersion device, control the temperature at about 40°C, and disperse it ultrasonically at a frequency of 45 Hz for 120 minutes...

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Abstract

The invention discloses a method for preparing a clutch facing through taking water soluble phenol-formaldehyde resin as an adhesion agent. The method adopts the water soluble phenol-formaldehyde resin which is multiply modified by polyvinyl alcohol, nanoscale attapulgite and micron-order copper powder as the adhesion agent, the water soluble phenol-formaldehyde resin, a friction performance conditioning agent and water are mixed to produce slurry, fibers are soaked in the slurry, are dried and are wound to form a parison, the parison is then subjected to hot-press forming to form the facing, grinding and drilling are carried out after the thermal treatment, the clutch facing is obtained. The modified adhesion agent has high solubility, cohesiveness, toughness, heat resistance, thermal fading resistance and abrasion resistance; and the clutch facing which is produced through the adhesion agent is low in cost, green and environment-friendly, can bear impact force during the processing and using processes, cannot crack and has high thermal stability, high and stable friction coefficient and low abrasion resistance.

Description

technical field [0001] The invention relates to the technical field of a clutch face used in a motor vehicle transmission system, in particular to a method for preparing a high-performance motor vehicle clutch face by using a water-soluble phenolic resin solution as a binder. Background technique [0002] As a friction material for motor vehicle transmission, the clutch face mainly uses phenolic resin, rubber, etc. as binders, reinforcing fibers, etc. constitute. The traditional clutch production process is mainly wet process, the process is as follows: (1) dissolve phenolic resin, rubber and other binders with organic solvents, add fillers and stir to make slurry; (2) impregnate long fiber slurry (3) Through hot pressing, heat treatment, end face grinding, punching or drilling processing to obtain clutch face products. [0003] With the development of modern industry, higher performance requirements are put forward for the clutch face used in motor vehicles. For example, ...

Claims

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Application Information

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IPC IPC(8): C08L61/14C08K3/34C08K3/08C08K3/04C08K3/22C08J5/14C08J5/04C08G8/28
Inventor 黄勇王宗和程慧玲乌学东曹慧军
Owner 浙江科马摩擦材料股份有限公司
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