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Cold-resistant hydrogenated nitrile rubber

A technology of hydrogenated nitrile rubber and oxidative hydrogenated nitrile, which is applied to pressure vessels used in chemical processes, etc., can solve problems such as being unable to cope with the requirements of high-cold use environments, achieve excellent compression cold resistance, improve low temperature resistance, and improve safety. level effect

Pending Publication Date: 2022-04-12
杭州爱力智控技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the present invention proposes a cold-resistant hydrogenated nitrile butadiene rubber, which solves the defect that the existing hydrogenated nitrile butadiene rubber cannot meet the requirements of the high cold environment

Method used

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  • Cold-resistant hydrogenated nitrile rubber
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  • Cold-resistant hydrogenated nitrile rubber

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A cold-resistant hydrogenated nitrile rubber, the formula of which includes the following materials: 100 parts of hydrogenated nitrile rubber, 3 to 5 parts of zinc oxide, 1 to 2 parts of stearic acid, 1 to 2 parts of palmitic acid; 0.5 to 4 parts of disperse agent, 10-12 parts of zinc borate, wherein the acrylonitrile content of the hydrogenated nitrile rubber is 39-41%. It includes 20-40 parts of aliphatic phosphate, 1-5 parts of vulcanizing agent and 4-6 parts of vulcanizing assistant. It includes 20-40 parts of aliphatic phosphate, 1-5 parts of vulcanizing agent and 4-6 parts of vulcanizing assistant.

[0032] It includes: the Mooney viscosity of the hydrogenated nitrile rubber is ML1+4, @100°C 60-70.

[0033] The present embodiment detects according to the following national standards:

[0034] GB / T 6034-1985 Determination of compression cold resistance coefficient of vulcanized rubber;

[0035] GB / T 6035-1985 Determination of tensile cold resistance coefficient ...

Embodiment 2

[0051] The preparation method of its hydrogenated nitrile rubber comprises the following steps:

[0052] 1) Epoxidation reaction: nitrile rubber is dissolved in xylene to make a nitrile rubber solution with a mass concentration of 11wt%, to which acetic acid and hydrogen peroxide are added successively, and the epoxidation reaction is carried out at 40° C. for 6 hours to obtain the epoxidation reaction Epoxidized nitrile rubber with an oxygen degree of 30%;

[0053] 2) hydrogenation reaction: the prepared epoxidized nitrile rubber is dissolved in xylene to make a mass concentration of 10% epoxidized nitrile rubber solution and put it into a hydrogenation kettle, to which Wilkinson Catalyst and ligand triphenylphosphine, at a temperature of 80 ° C and a hydrogen pressure of 1-3 MPa, hydrogenation reaction for 10 hours to obtain epoxidized hydrogenated nitrile rubber;

[0054] 3) ring-opening grafting reaction: add an acid anhydride and an epoxy group ring-opening catalyst to t...

Embodiment 3

[0056] The preparation method of its hydrogenated nitrile rubber comprises the following steps:

[0057] 1) Epoxidation reaction: nitrile rubber is dissolved in xylene to make a nitrile rubber solution with a mass concentration of 15 wt%, to which acetic acid and hydrogen peroxide are added successively, and epoxidation reaction is carried out at 40° C. for 8 hours to obtain epoxidation Epoxidized nitrile rubber with an oxygen degree of 50%;

[0058] 2) hydrogenation reaction: the prepared epoxidized nitrile rubber is dissolved in xylene to make a mass concentration of 16% epoxidized nitrile rubber solution and put it into a hydrogenation kettle, adding Wilkinson Catalyst and ligand triphenylphosphine, at a temperature of 120°C, hydrogen pressure slowly increased from 1MPa to 3MPa, hydrogenation reaction for 12h, to obtain epoxidized hydrogenated nitrile rubber;

[0059] 3) ring-opening grafting reaction: add an acid anhydride and an epoxy group ring-opening catalyst to the p...

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Abstract

The formula of the cold-resistant hydrogenated nitrile rubber comprises the following materials: 100 parts of hydrogenated nitrile rubber, 3-5 parts of zinc oxide, 1-2 parts of stearic acid and 1-2 parts of palmitic acid. The content of acrylonitrile in the hydrogenated butadiene-acrylonitrile rubber is 39%-41%, and the acrylonitrile content in the hydrogenated butadiene-acrylonitrile rubber is 40%-60%. The invention solves the defect that the existing hydrogenated butadiene-acrylonitrile rubber cannot meet the requirements of high and cold use environments.

Description

technical field [0001] The invention relates to the field of nitrile rubber production, in particular to a cold-resistant hydrogenated nitrile rubber. Background technique [0002] At present, rubber material sealing is widely used in various parts and parts of automobiles. Due to the working environment and road conditions of automobiles, there are many uncertainties. The high and low temperature resistance, air aging resistance, medium oil aging resistance and sealing service life of sealing materials High demands were made. At present, there are two main types of rubber sealing materials used in the automotive industry, namely fluorine rubber FKM and nitrile rubber NBR. Fluorine rubber is mainly suitable for high temperature environments, and its temperature range is generally -20°-200°. It is better than fluororubber, and its temperature range is generally -40°-120°, so the applicable temperature range of fluororubber and nitrile rubber materials has its limitations. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L15/00C08K3/22C08K5/09C08K3/38B01J3/04
Inventor 朱耀义陈威
Owner 杭州爱力智控技术有限公司
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