Production method for clutch surface adopting formaldehyde-phenol resin as cementing compound

A clutch face, phenolic resin technology, applied in the direction of adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., can solve the problems of inability to meet the requirements of use, brittleness of the clutch face, and rising operating costs. , to achieve the effect of increasing equipment investment and operating costs, improving process stability, and stabilizing friction coefficient

Inactive Publication Date: 2008-10-15
海盐华强树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the ratio of adhesive (phenolic resin and rubber) to solvent is 1: (2~3), therefore, a large amount of organic solvents need to be consumed in the manufacture of clutch faces by wet process
In addition, these solvents volatilize into the air, which will cause great environmental pollution
Although a solvent recovery device can be used, the solvent recovery device can only recover part of the solvent, and 20% to 50% of the solvent still evaporates into the air
In addition, the solvent recovery unit will lea

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 A clutch face was prepared by using nitrile latex, cashew nut shell liquid and melamine-modified water-soluble phenolic resin

[0019] Add 100Kg of phenol, 15Kg of cashew nut shell oil, 10Kg of melamine, 8Kg of ethylene glycol, 134Kg of formaldehyde with a content of 37%, 2.5Kg of potassium hydroxide, 1.5Kg of triethanolamine, 0.6Kg of sorbitan fatty acid ester, and 35Kg of clear water to the reaction React in the kettle for 2 hours at a temperature of 85°C, add 68Kg of nitrile latex with a solid content of 45%, continue to react for 1 hour at a temperature of 80°C, and then discharge. The miscibility ratio of the modified water-soluble phenolic resin and water is 1:2.

[0020] Add 80Kg of liquid resin prepared above, 0.6Kg of vulcanizing agent, 0.1Kg of accelerator, 0.2Kg of anti-aging agent, 18Kg of clear water, 0.5Kg of 30% aqueous sodium hydroxide solution and 70Kg of powdery filler into the beater, and stir for 30 minutes to form a slurry . Powder fille...

Embodiment 2

[0023] Example 2 Clutch face made of carboxylated nitrile latex, cashew nut shell oil and polyvinyl alcohol modified water-soluble phenolic resin

[0024] Add 100Kg of phenol, 10Kg of cashew nut shell oil, 7.5Kg of polyvinyl alcohol, 125Kg of formaldehyde with a content of 37%, 2.5Kg of sodium hydroxide, and 20Kg of clear water into the reaction kettle, and react at 90°C for 3 hours to become latex-free Cashew nut shell liquid, polyvinyl alcohol modified water-soluble phenolic resin. Stir the modified water-soluble phenolic resin without latex, 105Kg of carboxylated nitrile latex, and 1.0Kg of nonylphenol polyoxyethylene ether in the reaction kettle for 1 hour, and then the material can be discharged. The miscibility ratio of the modified water-soluble phenolic resin and water is 1:3.

[0025] Add 80Kg of liquid resin prepared above, 0.6Kg of vulcanizing agent, 0.15Kg of accelerator, 0.2Kg of anti-aging agent, 20Kg of clear water, 1.5Kg of 30% aqueous sodium hydroxide solutio...

Embodiment 3

[0028] Example 3 Clutch face made of styrene-butadiene latex, larch extract, and urea-modified water-soluble phenolic resin

[0029] 100Kg of phenol, 15Kg of larch extract, 6Kg of urea, 140Kg of styrene-butadiene latex with a content of 45%, 130Kg of formaldehyde with a content of 37%, and 4Kg of sodium hydroxide were added to the reactor, and reacted for 1 hour at a temperature of 80°C. React at 85°C for 1 hour, react at 90°C for 1.5 hours, cool to below 60°C, and then discharge. It becomes latex-containing larch extract and urea modified water-soluble phenolic resin, and the miscibility ratio of water-soluble phenolic resin and water is 1:5.

[0030] Add 76Kg of liquid resin prepared above, 0.7Kg of vulcanizing agent, 0.2Kg of accelerator, 0.2Kg of anti-aging agent, 24Kg of clear water, 1.5Kg of 30% aqueous sodium hydroxide solution and 100Kg of powdery filler into the beater, and stir for 30 minutes to form a slurry . Powder fillers are barium sulfate, talc powder, calciu...

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PUM

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Abstract

The invention discloses a method for making a clutch facing by using phenolic resin as adhesive. The method comprises the following steps that: (1) the latex modified water soluble phenolic resin is used as the adhesive to make the clutch facing, and water is used as solvent, and the adhesive and the solvent are mixed by stirring and prepared into pulp; (2) fibers are impregnated in the pulp; (3) fibers containing the pulp are dried; (4) the dried fibers containing the pulp are wound to become blanks; (5) blanks are heat moulded; (6) the clutch facing is obtained after subsequent treatments. The method of the invention has the advantages of saving a large amount of organic solvent, avoiding the environmental pollution caused by the consumption and the volatilization of the solvent, greatly saving the energy used for the preparation of the pulp and saving equipment cost on aspects of safety, fire fighting and environmental protection and management cost; moreover, the clutch facing made by the method of the invention is excellent in performance.

Description

technical field [0001] The invention relates to a production method of using phenolic resin as an adhesive to prepare a clutch face, in particular to a production method of using a modified phenolic resin as an adhesive and a wet process to prepare a clutch face. Background technique [0002] At present, the use of wet process to manufacture clutch face is still the mainstream technology of domestic clutch face manufacturers. The process flow of wet process manufacturing clutch face is as follows: (1) stirring and mixing phenolic resin, rubber, filler and solvent to prepare a slurry; (2) impregnating continuous fibers in the slurry; (3) mixing Continuous fiber drying of slurry; (4) winding the dried fiber containing slurry into blank; (5) hot-pressing the blank on a press and a mold; (6) heat treatment, end grinding Cutting, punching or drilling, that is, to make the finished clutch face. Wherein, an organic solvent needs to be used in the process of preparing the slurry, ...

Claims

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Application Information

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IPC IPC(8): F16D69/02C09J161/14C09J9/00C09J109/10
Inventor 胡以强钟山霞金钟
Owner 海盐华强树脂有限公司
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