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Method for improving cold-thermal fatigue resistance of rubber sealing part

A rubber seal and fatigue-resistant technology, applied in the field of rubber seal processing, can solve problems such as unsatisfactory performance, and achieve the effects of improving compactness and thermal fatigue resistance, strengthening rubber properties, and improving strength and toughness.

Inactive Publication Date: 2017-12-01
宁国市润丰金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Rubber seals are widely used. In many occasions, they are required to be resistant to high and low temperatures. When alternating between high and low temperatures, it is time to test the resistance of rubber to cold and heat fatigue. Existing synthetic rubber, when dealing with cold and hot changes , showing unsatisfactory performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A method for improving the cold and heat fatigue resistance of rubber seals, comprising adding nano-alumina with a mass fraction of 0.10% to the raw materials for the preparation of rubber seals, the preparation method of the nano-alumina is: using a gel-sol method for preparation , using aluminum ethoxide as the raw material, dissolved in n-butane, adding distilled water and slowly raising the temperature to 60°C, and keeping the mixture in a closed incubator. After the gel was formed, it was aged at room temperature for 2 days, and the obtained gel was After lowering the temperature and removing the solvent, dry it in a vacuum oven at 70°C for 2 hours. After drying, put it into a preheated muffle furnace and calcinate for 1 hour to obtain ultrafine dispersed nano-alumina powder, which can be further dried.

[0015] As a further description of the above solution, the mixing method of the nano-alumina and the rubber is that during vulcanization, they are added to the vul...

Embodiment 2

[0020] A method for improving the cold and heat fatigue resistance of rubber seals, adding nano-alumina with a mass fraction of 0.12% to the raw materials for the preparation of rubber seals, the preparation method of the nano-alumina is: using a gel-sol method for preparation , using aluminum ethoxide as raw material, dissolved in n-butane, adding distilled water and slowly raising the temperature to 65°C, putting the mixed solution in a closed incubator to keep warm, after the gel was formed, aged at room temperature for 2 days, and the obtained gel was After lowering the temperature and removing the solvent, dry in a vacuum oven at 75°C for 2.5 hours. After drying, put it into a preheated muffle furnace and calcinate for 1.5 hours to obtain ultrafine dispersed nano-alumina powder, which can be further dried.

[0021] As a further description of the above solution, the mixing method of the nano-alumina and the rubber is that during vulcanization, they are added to the vulcani...

Embodiment 3

[0026] A method for improving the cold and heat fatigue resistance of rubber seals, adding nano-alumina with a mass fraction of 0.15% to the raw materials for the preparation of rubber seals, the preparation method of the nano-alumina is: using a gel-sol method for preparation , using aluminum ethoxide as raw material, dissolved in n-butane, adding distilled water and slowly raising the temperature to 70°C, putting the mixed solution in a closed incubator to keep warm, after the gel was formed, aged at room temperature for 3 days, and the obtained gel was After lowering the temperature and removing the solvent, dry in a vacuum oven at 80°C for 3 hours, and then put it into a preheated muffle furnace for calcination for 2 hours to obtain ultrafine dispersed nano-alumina powder, which can be further dried.

[0027] As a further description of the above solution, the mixing method of the nano-alumina and the rubber is that during vulcanization, they are added to the vulcanizer tog...

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PUM

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Abstract

The invention relates to the technical field of processing rubber seals, and discloses a method for improving the resistance to cold and heat fatigue of rubber seals. The sol-gel method is used to prepare alumina, and the aluminum oxide with high strength, heat resistance and heat resistance is prepared under high temperature calcination. The corroded nano-alumina is compounded with the rubber seal material, which can strengthen the rubber performance, reduce the friction coefficient of the rubber seal, improve the service life, and has good electrical insulation and chemical durability. The present invention adds nano The method of aluminum oxide improves the compactness of the rubber seal and the resistance to cold and heat fatigue, and further improves the strength and toughness.

Description

technical field [0001] The invention belongs to the technical field of processing rubber seals, and in particular relates to a method for improving the cold and heat fatigue resistance of rubber seals. Background technique [0002] Rubber seals are a common basic component in sealing devices, and play a very important role in the contradiction between leakage and sealing. Rubber, together with plastic and fiber, is called the three major synthetic materials, and is the only polymer material with high elasticity and excellent elasticity. The biggest feature of rubber is that the modulus of elasticity is very small and the elongation is very high. The second is that it has fairly good gas permeability resistance, resistance to various chemical media and electrical insulation properties. Some special synthetic rubbers have good oil resistance and temperature resistance, and can resist the swelling of fatty oil, lubricating oil, hydraulic oil, fuel oil and solvent oil; cold re...

Claims

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Application Information

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IPC IPC(8): C08L21/00C08K3/22C09K3/10C01F7/02B82Y40/00
CPCC08K3/22B82Y40/00C01F7/02C08K2003/2227C08K2201/011C08K2201/014C08L2201/08C09K3/10
Inventor 文有余
Owner 宁国市润丰金属制品有限公司