Ethylene-cycloolefin copolymer and preparation method thereof

By using a catalyst combination of a metallocene compound with a specific structure and a co-catalyst component, the reaction conditions of ethylene-cycloolefin copolymerization are optimized, the problems of insufficient activity and copolymerization performance of existing catalysts are solved, and efficient and low-cost preparation of ethylene-cycloolefin copolymers is achieved.

CN119431665BActive Publication Date: 2025-10-14CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202310961997.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-08-01
Publication Date
2025-10-14
Estimated Expiration
2043-08-01

AI Technical Summary

Technical Problem

Existing metallocene catalysts have deficiencies in catalytic activity, copolymerization performance and polymer molecular weight, and their high synthesis cost limits the widespread application of ethylene-cycloolefin copolymers.

Method used

The copolymerization reaction of ethylene and cycloolefin is carried out using a catalyst composition, which includes a metallocene compound with a specific structure and a co-catalyst component, such as a combination of alkylaluminoxane or an organic boron compound and an organic aluminum compound. The reaction conditions are optimized to improve the catalytic activity and copolymerization performance.

Benefits of technology

The preparation of ethylene-cycloolefin copolymer with high catalytic activity, good copolymerization performance and high molecular weight is achieved, and the synthesis cost of the catalyst is reduced.

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Abstract

The present application relates to the field of olefin copolymerization, and discloses an ethylene-cycloolefin copolymer and a preparation method thereof.The method comprises the following steps: using a catalyst composition to perform copolymerization reaction on ethylene and a cycloolefin, wherein the catalyst composition comprises the following components: a) a metallocene compound with a structure shown in formula (1); and b) a cocatalyst component, wherein, in formula (1), M is a tetravalent transition metal atom; X 1 and X 2 each independently is a halogen atom, an alkyl group with 1-10 carbon atoms, an aromatic group with 6-12 carbon atoms, or an N,N-dihydrocarbylamine group with 2-8 carbon atoms. According to the method, the catalyst has the advantages of high catalytic activity, good copolymerization performance and high molecular weight of the obtained copolymer, and the catalyst is easy to synthesize and has low synthesis cost.
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