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Heat-resistant and oil-resistant sealing ring and preparation method thereof

An oil-resistant sealing ring and heat-resistant technology, applied in the field of heat-resistant and oil-resistant sealing ring and its preparation

Pending Publication Date: 2020-05-08
河北新尔特橡塑密封有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of the automobile industry, people have higher requirements for vehicle safety and comfort, so the operating temperature and service life of auto parts are getting higher and higher, such as the temperature resistance requirements of rubber parts related to automobile engines and surrounding areas When the temperature is increased to 150°C, the general nitrile rubber cannot meet the requirements, so we can only choose acrylic rubber, fluororubber, hydrogenated nitrile rubber, etc. with better temperature resistance, but the price of these rubbers is several times that of nitrile rubber

Method used

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  • Heat-resistant and oil-resistant sealing ring and preparation method thereof
  • Heat-resistant and oil-resistant sealing ring and preparation method thereof
  • Heat-resistant and oil-resistant sealing ring and preparation method thereof

Examples

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preparation example Construction

[0037]The present invention also provides a method for preparing the above-mentioned heat-resistant and oil-resistant sealing ring, comprising the following steps:

[0038] 1) Nitrile rubber, chlorosulfonated polyethylene, vinyl trimethoxysilane, carbon black N330, filler, urethane, polyolefin elastomer, vinyl bis stearamide, diethyl disulfide Substitute zinc carbamate and anti-aging agent into the internal mixer and banbury at 80-100°C for 8-12 minutes;

[0039] 2) Put the rubber material well mixed into the open mill, and then add carbon black N330, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane at 80 Mixing at ~120°C for 4-6 minutes, thinning and sheeting;

[0040] 3) Cut the film in step (3) into the required model products for production, heat the mold to 160-180°C with a vacuum flat vulcanizer, then put the cut film into the mold cavity, close the mold for vulcanization, and pressurize to 160~180Kgf / cm 2 Finally, the vulcanization time is 3 to 5 minutes, the product is ...

Embodiment 1

[0045] The preparation method of filler, comprises the following steps:

[0046] 1) After the filler is pulverized, it is divided into two parts, that is, the first filler and the second filler, for later use; the mass ratio of the first filler to the second filler is 1.3:1; the filler is aluminum hydroxide;

[0047] 2) Chitosan is added in the acetic acid solution, and stirred evenly, obtains the chitosan acetic acid solution;

[0048] 3) Add the first filler obtained in step 1) into the chitosan acetic acid solution and stir evenly, then add sodium hydroxide until the pH value reaches 6, and then stir for 80 minutes;

[0049] 4) Add the second filler to the mixture obtained in step 3), stir for 2 hours, filter and wash to obtain a filter cake, vacuum-dry the filter cake at 40° C., grind it, and pass through a 300-mesh sieve to obtain the filler.

Embodiment 2

[0051] The preparation method of filler, comprises the following steps:

[0052] 1) After the filler is pulverized, it is divided into two parts, that is, the first filler and the second filler, for later use; the mass ratio of the first filler to the second filler is 1.6:1; the filler is magnesium hydroxide and calcium carbonate, magnesium hydroxide and The mass ratio of calcium carbonate is 1:1;

[0053] 2) Chitosan is added in the acetic acid solution, and stirred evenly, obtains the chitosan acetic acid solution;

[0054] 3) Add the first filler obtained in step 1) into the chitosan acetic acid solution and stir evenly, then add sodium hydroxide until the pH value reaches 7, and then stir for 100 min;

[0055] 4) Add the second filler to the mixed solution obtained in step 3), stir for 3 hours, filter and wash to obtain a filter cake, vacuum-dry the filter cake at 60° C., grind it, and pass through a 500-mesh sieve to obtain the filler.

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Abstract

The invention provides a heat-resistant and oil-resistant sealing ring and a preparation method thereof. Nitrile rubber is adopted as a main material and has excellent oil resistance and heat resistance, and the nitrile rubber is adopted as a main raw material for preparing the heat-resistant and oil-resistant sealing ring, so that the sealing ring has excellent oil resistance and heat resistance;a polyolefin elastomer can enable the sealing ring to have high tensile strength and tensile elongation; chlorosulfonated polyethylene is used for improving the heat resistance of the heat-resistantand oil-resistant rubber, so that the sealing ring has excellent aging resistance; and vinyltrimethoxysilane is used for improving the oil resistance of the sealing ring, so that the sealing ring still has high tensile strength and tensile elongation at break after being soaked in oil. Experimental results show that the heat-resistant and oil-resistant sealing ring has excellent heat resistance, oil resistance, mechanical properties and the like. The preparation method is simple, and the prepared heat-resistant and oil-resistant sealing ring has excellent elasticity, oil resistance and heat resistance.

Description

technical field [0001] The invention belongs to the field of sealing rings, in particular to a heat-resistant and oil-resistant sealing ring and a preparation method thereof. Background technique [0002] The seal is generally composed of a moving ring, a static ring and a sealing ring; the sealing ring plays a vital role in the sealing effect of the seal. The sealing ring is used in various industries, and it is fixed in the gap to form an elastic barrier, which plays the role of barrier and seal. It is divided into liquid seal and air seal, and the oil seal is more complicated in the liquid seal. For example, the rubber sealing ring used on the cylinder, piston and other parts of the car engine must not only achieve the barrier sealing effect, but also because the sealed medium is fuel or lubricating oil, the rubber sealing ring must be resistant to oil and high temperature. . The current rubber sealing rings often encounter poor problems such as heat resistance and oil...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L23/34C08K13/06C08K5/5425C08K5/14C08K3/22C08K3/26C08K3/34
CPCC08L9/02C08L2201/08C08L2205/03C08K2003/2227C08K2003/2224C08K2003/265C08K2003/2206C08K2003/2296C08L23/34C08K13/06C08K5/5425C08K5/14C08K3/22C08K3/26C08K3/34
Inventor 宋增胜任晓龙孟令彦马丽霞张雨苏金龙宋金环侯敏苏俊英闫婷婷
Owner 河北新尔特橡塑密封有限公司
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