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Polymerization process for polyesteramide

A technology of polyester amide and polymerization process, applied in the field of engineering plastics, can solve the problems of difficult continuous production of polyester amide and long reaction time, and achieve the effects of improving temperature resistance, high mixing efficiency and improving production efficiency

Active Publication Date: 2020-07-03
CHENGDU 401 TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings of traditional polyester amide that are difficult to produce continuously and the reaction time is long, the present invention provides a polymerization process for polyester amide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A polyester amide polymerization process, the polymerization raw materials, by mass, include 5 parts of polymerized monomer dibasic acid, 5 parts of diamine and 90 parts of reactive dispersion medium polyester; uniformly disperse the polymerized monomer into the molten In a reactive dispersion medium, a polymerization reaction occurs to obtain a polyester amide with a suitable molecular weight.

Embodiment 2

[0042] A polyester amide polymerization process, the polymerization raw materials, by mass, include 60 parts of polymeric monomer dibasic acid esters, 30 parts of diamines and 10 parts of reactive dispersion medium polyester; the raw materials are added to the screw extruder by weight measurement out of the device for melting reaction and mixing evenly, and then enter the tank reaction device to complete continuous polymerization reaction and obtain polyester amide with suitable molecular weight.

[0043] The dibasic acid ester raw material contains aromatic dibasic acid ester, and the aromatic dibasic acid ester accounts for 60% of the molar ratio of the dibasic acid ester raw material.

[0044] The moisture content in the polymerization raw material does not exceed 5%.

Embodiment 3

[0046] A polyester amide polymerization process, the polymerization raw materials are calculated by mass, including 10 parts of polymerized monomer dibasic acid, 3 parts of diamine and 15 parts of reactive dispersion medium polyester amide; the raw materials are added to the screw extruder by weight measurement out of the device for melt reaction and mixing evenly, and then enter the subsequent screw extrusion device to complete the continuous polymerization reaction, and then extrude and granulate from the screw extrusion device to obtain polyester amide with a suitable molecular weight.

[0047] The screw of the screw extrusion device is sequentially divided into a feeding section and a melting and dispersing section. The material does not melt in the feeding section, and the temperature of the melting and dispersing section is not lower than the melting point of the polyester amide raw material.

[0048] First put the dibasic acid and polyester amide into the screw extrusion...

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Abstract

The invention provides a polymerization process for polyesteramide. The polymerization process is characterized by comprising the following polymerization raw materials by mass: 5-60 parts of a polymerization monomer, namely dibasic acid / dibasic acid ester, 3-50 parts of diamine, and 10-90 parts of a reactive dispersion medium, namely polyester / polyesteramide. The polymerization process comprisesthe following steps: uniformly dispersing the polymerization monomer into a molten reactive dispersion medium, and carrying out a polymerization reaction so as to obtain the polyesteramide with a proper molecular weight. The production efficiency of the polyesteramide can be significantly improved.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a polyester amide polymerization process. Background technique [0002] Polyester and polyamide are widely used engineering plastics, and both have their own advantages. Polyamide has excellent mechanical properties and heat resistance, but because of its large molecular polarity, it is easy to absorb water and cause poor dimensional stability. Polyester also has excellent mechanical properties, but its temperature resistance is not as good as that of polyamide, and because ester bonds are more easily hydrolyzed than amide bonds, polyester is prone to degradation in long-term humid environments. Ester bonds have lower water absorption relative to amide bonds, so polyesters have lower water absorption and better dimensional stability than polyamides. In order to combine the advantages of the two, the copolymer polyester amide of the two has also become an important ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/44
CPCC08G69/44
Inventor 李洋
Owner CHENGDU 401 TECH CO LTD
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