High-performance UHMWPE (Ultra High Molecular Weight Polyethylene) and slurry method preparation process thereof

By using a post-transition metal catalyst with 1,10-phenanthroline-5,6-dione as the framework, the problem of insufficient catalyst activity and thermal stability in the UHMWPE manufacturing process was solved, and the efficient preparation of bimodal UHMWPE at high temperature was achieved, which improved the processing performance of the product.

CN119735721AActive Publication Date: 2025-04-01PUXIJING NEW MATERIALS (SHANGHAI) CO LTD
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Patent Information

Application Number
CN202510044689.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-13
Publication Date
2025-04-01
Estimated Expiration
2045-01-13

AI Technical Summary

Technical Problem

There are problems of insufficient catalyst activity and thermal stability in the existing UHMWPE manufacturing process, which leads to a decrease in catalytic activity at high temperatures, limiting the application of UHMWPE in the high-end market.

Method used

Using a post-transition metal catalyst with 1,10-phenanthroline-5,6-dione as the framework, the preparation of bimodal UHMWPE is achieved by increasing the steric hindrance and rigid parent ring framework structure to improve catalytic activity and thermal stability.

Benefits of technology

The catalyst maintains high catalytic activity in a wide temperature range, especially with excellent thermal stability at high temperatures, and can prepare bimodal UHMWPE with a weight average molecular weight of 1.5 to 2 million and a PDI of 5 to 6, and has excellent product processing performance.

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Abstract

The invention relates to the technical field of polyethylene, in particular to high-performance UHMWPE (ultrahigh molecular weight polyethylene) and a slurry method preparation process thereof, monomer ethylene is used as a raw material, a catalyst is added into a solvent, a polymerization reaction is performed under the conditions that the temperature is 60-100 DEG C and the pressure is 0.1-10 MPa, after the reaction is finished, post-treatment is performed to obtain a UHMWPE product, a late transition metal catalyst with 2, 6-diketone as a skeleton is used as a main catalyst. The bimodal UHMWPE is prepared through one-step reaction by utilizing the high activity and thermal stability of the diimine late transition metal catalyst, and the processing performance of the product is improved.
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