Hydrogenated nitrile rubber raw material composition, hydrogenated nitrile rubber, and method for producing the same

Functionalized nitrile butadiene rubber was prepared by copolymerizing functionalized monomers with acrylonitrile and butadiene monomers. This solved the problem of balancing the low-temperature resistance and oil resistance of hydrogenated nitrile butadiene rubber, and improved both properties, making it suitable for petroleum exploration equipment.

CN122103470APending Publication Date: 2026-05-29PETROCHINA SHANGHAI ADVANCED MATERIALS RESEARCH INSTITUTE CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PETROCHINA SHANGHAI ADVANCED MATERIALS RESEARCH INSTITUTE CO LTD
Filing Date
2024-11-29
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technologies struggle to improve the low-temperature resistance of hydrogenated nitrile butadiene rubber without compromising its oil resistance, and existing modification methods are complex, costly, and ineffective.

Method used

Functionalized nitrile rubber was prepared by copolymerizing functionalized monomers with acrylonitrile and butadiene monomers. The crystallinity was reduced by ester groups and long-chain alkyl branching structures on the main chain, and the group effects of ester and cyano groups were combined to achieve a balance between low-temperature resistance and oil resistance.

Benefits of technology

It significantly improves the low-temperature resistance of hydrogenated nitrile butadiene rubber without sacrificing its oil resistance, and the modification effect is remarkable, making it suitable for use in oil exploration equipment.

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Abstract

The application provides a hydrogenated nitrile rubber raw material composition, a hydrogenated nitrile rubber and a preparation method thereof. The hydrogenated nitrile rubber raw material composition comprises acrylonitrile, butadiene monomers and functional monomers. The functional monomers contain ester groups and long-chain alkyl branched structures on the main chain structure. In the hydrogenation process, the structures can reduce the crystallinity of the hydrogenated nitrile rubber, lower the glass transition temperature of the hydrogenated nitrile rubber, improve the low-temperature resistance of the hydrogenated nitrile rubber, further improve the oil resistance of the hydrogenated nitrile rubber, and achieve the balance between the low-temperature resistance and the oil resistance of the hydrogenated nitrile rubber.
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