A kind of aniline pyridine amino-zinc catalyst and its preparation method and application

By catalyzing the ring-opening polymerization of cyclic esters and lactones using aniline pyridine amino-zinc catalysts, the shortcomings of the catalysts in the prior art in regulating reactivity and controlling polymer performance are solved, and a high-efficiency synthesis of aliphatic polyesters with high molecular weight and low molecular weight distributions are achieved.

CN118878562BActive Publication Date: 2025-04-18TIANJIN UNIV
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Patent Information

Application Number
CN202411185152.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-08-27
Publication Date
2025-04-18
Estimated Expiration
2044-08-27

AI Technical Summary

Technical Problem

In the prior art, organometallic catalysts used for ring-opening polymerization of cyclic ester have shortcomings in regulating reactive activity and controlling the molecular weight, polydispersion index and stereomicrostructure of the polymer, resulting in unstable performance of the polymer.

Method used

A catalyst with high catalytic activity and low biotoxicity is proposed, and a catalyst is obtained by reacting a anisinylpyridine amino ligand with a zinc source, which is used to catalyze the ring-opening polymerization of cyclic esters and lactones.

Benefits of technology

The synthesis of aliphatic polyester is achieved with a monomer conversion rate greater than 90%, and polylactic acid, polycaprolactone and polyvalerolide with high molecular weight and low molecular weight distribution are obtained, which improves the performance stability of the polymer.

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Abstract

The invention discloses an aniline pyridine amino zinc catalyst and a preparation method and application thereof, belonging to the technical field of polyester catalysts. The invention can directly utilize an aniline pyridine amino ligand to react with a zinc source, and directly drain the solvent after the reaction to obtain a corresponding catalyst. The invention also utilizes the synthesized catalyst to catalyze cyclic ester monomers to prepare biodegradable aliphatic polyesters, and the monomer conversion rate is greater than 90%. Compared with the currently commercialized stannous isooctanoate catalyst, the aniline pyridine amino zinc complex provided by the invention has higher catalytic activity and lower biological toxicity, and has good application prospects.
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Citation Information

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