An olefin-acrylate polymer and a method for preparing the same

CN117659291BActive Publication Date: 2026-06-19PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PETROCHINA CO LTD
Filing Date
2022-08-29
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

In the existing technology, the production of copolymers of olefins and acrylate monomers suffers from problems such as low polymerization activity and low molecular weight of products in low-pressure methods, and harsh conditions in high-pressure methods.

Method used

A two-stage polymerization method is adopted. First, acrylate monomers are subjected to atmospheric pressure free radical polymerization under the action of an initiator in an inert atmosphere to form macromolecular prepolymers. Then, under low pressure, a diimine nickel complex catalyst system is added to copolymerize with olefin monomers.

Benefits of technology

It achieves efficient copolymerization under mild, low-pressure conditions, improves catalytic activity, increases polymer molecular weight, reduces equipment requirements and energy consumption, and is suitable for industrial production.

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Abstract

This invention provides an olefin-acrylate polymer and its preparation method. The preparation method includes the following steps: under an inert atmosphere, a first monomer and an initiator undergo a first-stage polymerization reaction in a solvent to obtain a post-polymerization system; a second monomer and a nickel diimide complex catalyst system are added to the post-polymerization system to conduct a second-stage polymerization reaction; after the reaction, the olefin-acrylate polymer is obtained; wherein the first monomer is an acrylate monomer and the second monomer is an olefin monomer. The olefin-acrylate polymer provided by this invention is prepared by this method. The preparation method of the olefin-acrylate polymer provided by this invention can solve the problems of low activity and low molecular weight of existing low-pressure polymerization methods and harsh conditions of high-pressure methods, and has the advantages of mild process conditions, high polymerization activity, and high molecular weight of the prepared polymer.
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