Pyrrolidyl amino bidentate ligand aluminum complex and preparation method and application thereof

A technology of pyrrolidinylamine and bidentate ligand is applied to the application field of lactone ring-opening polymerization, which can solve the difficulty of industrial production, ε-caprolactone does not have any catalytic activity, and the catalytic activity and selectivity are relatively affected. It can achieve the effect of highly controllable molecular weight, stable properties and simple preparation method.
CN102199167AInactive Publication Date: 2011-09-28EAST CHINA UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
EAST CHINA UNIV OF SCI & TECH
Publication Date
2011-09-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a pyrrolidyl amino bidentate ligand aluminum complex, a preparation method thereof and application thereof in catalyzing polymerization of lactone. The preparation method comprises the following steps of: directly reacting a neutral pyrrolidyl amino bidentate ligand with an alkyl aluminum compound; and filtering, concentrating and recrystallizing to obtain the target compound from reaction products. The pyrrolidyl amino bidentate ligand aluminum complex is a high-efficiency catalyst for ring-opening polymerization of the lactone, can be used for polymerization reaction of lactide, epsilon-caprolactone and the like. The pyrrolidyl amino bidentate ligand aluminum complex has the obvious advantages that: raw materials are readily available; the synthetic route is simple; the product has high yield, stable properties and higher catalytic activity; poly(L-lactide) and poly(epsilon-caprolactone) with high molecular weight and narrow molecular weight distribution can be obtained; and the requirement of the industrial department can be met. The structural formula of the complex is shown as the description.
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Description

technical field

[0001] The invention relates to a novel pyrrolidinyl amino bidentate ligand aluminum metal complex and the application of the compound in lactone ring-opening polymerization. Background technique

[0002] Due to their good biodegradability, biocompatibility and mechanical processing properties, polylactide, polycaprolactone and their copolymers are widely used in medical and health fields such as drugs, drug sustained-release materials, tissue scaffolds, and gene antibody carriers. It has a wide range of uses, and its potential application value as a substitute for polyolefin products is increasingly emerging (Adv. Mater. 1996, 8, 305-313). The preparation of polylactide, polycaprolactone and other aliphatic polyesters by ring-opening polymerization of lactones catalyzed by metal-organic complexes has the characteristics of high catalytic activity, controllable molecular weight and three-dimensional structure of polymers, and has a strong position in the fiel...

Claims

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