Alpha olefin / maleic anhydride alternating copolymer and preparation method thereof

By introducing Lewis acid as a cocatalyst in the preparation process of the alternating copolymer of α olefin/maleic anhydride, the problem of long-term reactions in high temperature is solved, and high-efficiency preparation of high molecular weight copolymers is achieved, reducing energy consumption and improving production efficiency.

CN116396419BActive Publication Date: 2025-08-29CHANGCHUN INSTITUTE OF APPLIED CHEMISTRY CHINESE ACADEMY OF SCIENCES
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Patent Information

Application Number
CN202310519435.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-05-09
Publication Date
2025-08-29
Estimated Expiration
2043-05-09

AI Technical Summary

Technical Problem

It is difficult to efficiently prepare high molecular weight alpha olefin/maleic anhydride alternating copolymers with high molecular weight, and there are problems such as long-term reactions at high temperatures, high energy consumption, and low production efficiency.

Method used

Lewis acid is used as a cocatalyst to conduct radical copolymerization under anhydrous and oxygen-free conditions, combining specific Lewis acids and free radical initiators to improve copolymerization activity, reduce polymerization temperature and reaction time, and inhibit chain transfer.

Benefits of technology

The molecular weight of the α olefin/maleic anhydride alternating copolymer is significantly improved, energy consumption is reduced, reaction time is shortened, and monomer conversion and production efficiency is improved.

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Abstract

The present invention provides an α-olefin / maleic anhydride alternating copolymer obtained by free radical copolymerization of an α-olefin and maleic anhydride; the alternating copolymer has a number average molecular weight of greater than or equal to 10,000. The present invention utilizes a specific Lewis acid as a co-catalyst and introduces it into the copolymerization initiation system, significantly enhancing the copolymerization activity of the α-olefin and maleic anhydride, lowering the polymerization temperature, shortening the polymerization reaction time, reducing energy consumption, and increasing monomer conversion, thereby significantly improving production efficiency. Furthermore, the addition of the Lewis acid as a co-catalyst inhibits chain transfer and increases the molecular weight of the copolymer, but not all Lewis acids have the same specific technical effects.
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Citation Information

Patent Citations

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