Method for preparing biodegradable polyesteramide through chain extension

A polyester amide, biodegradable technology, applied in the field of high molecular weight biodegradable polyester amide, can solve the problems of high equipment requirements, high vacuum degree, low content of polyester amide amide bonds, etc., to achieve time-saving reaction level, easy Easy to control and respond to the effect
CN101585915BInactive Publication Date: 2011-04-20BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2011-04-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing biodegradable polyesteramide through chain extension, and relates to a method for preparing polyesteramide. The prior method for preparing the polyesteramide has the defects of environmental pollution, high requirements on equipment and vacuity, difficult control of material input ratio and the like. The method of the invention comprises the followingsteps: performing melt polycondensation on diamide-diols, dibasic acid and aliphatic diol to prepare polyesteramide prepolymer provided with terminal carboxyl group and terminal hydroxy group structures simultaneously; and performing chain extension with chain extenders of diacyl dilactam and bis-2-oxazoline to prepare the biodegradable polyesteramide of which the limiting viscosity is between 0.42 and 1.05dL / g. The method has low requirement on the vacuity, simplicity and convenience, high efficiency, time conservation, and rich and easily-obtained raw materials, and can prepare polyesteramide with different amide contents to control structures and performance of products by changing the ratio of the diamide-diols to the aliphatic diol to the dibasic acid.
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Description

technical field

[0001] The invention relates to a preparation method of polyester amide, in particular to a method for preparing high-molecular-weight biodegradable polyester amide with an intrinsic viscosity of 0.42-1.05 dL / g by adopting a two-step method of polycondensation and chain extension. Background technique

[0002] Polyester amides (PEAs) are a new type of biodegradable polymer materials. Compared with aliphatic polyesters, due to the introduction of amide groups and the formation of hydrogen bonds between amide groups, the polymers have better mechanical properties and strength, while the presence of ester bonds endows the material with good biodegradability, making it have a wide range of application prospects.

[0003] U.S. Patent No. 4,343,931 (1982) reported the synthesis of diamide diol by the reaction of glycolic acid or lactic acid and aliphatic diamines, and reacted it with dibasic acid chlorides to prepare bioabsorbable polyester amides. 3M Company has ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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