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PA6-serial thermoplastic elastomer with high resilience and preparation method thereof

A thermoplastic elastomer and resilience technology, applied in the field of high resilience PA6 series thermoplastic elastomer and its preparation, can solve the problem of weak physical cross-linking point binding force of hard segments, easy slippage of macromolecular chains, and poor product resilience. and other problems, to achieve the effects of excellent resilience, high molecular weight and high production efficiency

Active Publication Date: 2018-02-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The thermoplastic elastomer prepared by the above method, due to the weak binding force of the physical crosslinking point of the hard segment, the macromolecular chain is easy to slip during the stretching process, and the product has poor resilience, which limits its further application in the industrial field

Method used

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  • PA6-serial thermoplastic elastomer with high resilience and preparation method thereof
  • PA6-serial thermoplastic elastomer with high resilience and preparation method thereof
  • PA6-serial thermoplastic elastomer with high resilience and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0055] A high-resilience PA6-based thermoplastic elastomer, the preparation method of which comprises: preparing a double-terminated carboxyl PA6 prepolymer by hydrolytic ring-opening polymerization, then adding diol for esterification, and finally adding polyglycol and a cross-linking agent for reaction, thus preparing high resilience PA6 series thermoplastic elastomers.

[0056] The preparation method of the above-mentioned high resilience PA6 series thermoplastic elastomer is:

[0057] The first step: prepare double-terminal carboxyl PA6 prepolymer by hydrolytic ring-opening polymerization method: add 100g caprolactam, 5g deionized water, 1g 4-aminobutyric acid, 9.1g terephthalic acid, 0.1g phosphoric acid into a 500mL polymerization kettle Triphenyl ester. Nitrogen was introduced into the kettle to replace the air in the kettle, and then the pressure was increased to 8 bar, and the temperature was raised to 270° C. for 1.5 hours at a stirring speed of 200 r / min. Then the...

Embodiment 2

[0061] A high-resilience PA6-based thermoplastic elastomer, the preparation method of which comprises: preparing a double-terminated carboxyl PA6 prepolymer by hydrolytic ring-opening polymerization, then adding diol for esterification, and finally adding polyglycol and a cross-linking agent for reaction, thus preparing high resilience PA6 series thermoplastic elastomers.

[0062] The preparation method of the above-mentioned high resilience PA6 series thermoplastic elastomer is:

[0063] The first step: prepare double-terminal carboxyl PA6 prepolymer by hydrolytic ring-opening polymerization method: add 100g caprolactam, 5g deionized water, 1g 6-aminocaproic acid, 9.1g terephthalic acid, 0.1g phosphoric acid into a 500mL polymerization kettle Triphenyl ester. Nitrogen was introduced into the kettle, and the pressure in the kettle was replaced to 8 bar. At a stirring speed of 200r / min, the temperature was raised to 270°C. After 1.5 hours of reaction, the pressure was reduce...

Embodiment 3

[0067] A high-resilience PA6-based thermoplastic elastomer, the preparation method of which comprises: preparing a double-terminated carboxyl PA6 prepolymer by hydrolytic ring-opening polymerization, then adding diol for esterification, and finally adding polyglycol and a cross-linking agent for reaction, thus preparing high resilience PA6 series thermoplastic elastomers.

[0068] The preparation method of the above-mentioned high resilience PA6 series thermoplastic elastomer is:

[0069] The first step: prepare double-terminal carboxyl PA6 prepolymer by hydrolytic ring-opening polymerization method: add 100g caprolactam, 5g deionized water, 1g 5-aminovaleric acid, 4.7g oxalic acid, 0.1g Irganox1010 into a 500mL polymerization kettle. Nitrogen gas was introduced into the kettle, and the pressure was increased to 6 bar after replacing the air in the kettle. At a stirring speed of 200r / min, the temperature was raised to 270°C. After 1.5 hours of reaction, the pressure was redu...

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Abstract

The invention provides a PA6-serial thermoplastic elastomer with high resilience and a preparation method thereof. The preparation method is characterized by comprising preparing a double terminated-carboxyl PA6 prepolymer through a hydrolysis ring-opening polymerization process, then adding a dibasic alcohol for esterification reaction, and finally adding polyglycol and a crosslinking agent for areaction, so as to prepare the PA6-serial thermoplastic elastomer with high resilience. With introduction of a proper amount of chemical crosslinking sites into the elastomer, the PA6-serial thermoplastic elastomer has excellent resilience while guaranteeing relatively high elongation. The PA6-serial thermoplastic elastomer disclosed by the invention is high in intrinsic viscosity, good in chainregularity, excellent in resilience (the resilience is 95% or more when the enlogation is 100%) and adjustable in Shore hardness. In addition, the caprolactam conversion rate is high and the reactionspeed is fast during elastomer synthesis, and disadvantages of the prior art are made up.

Description

technical field [0001] The invention relates to a high resilience PA6 series thermoplastic elastomer and a preparation method thereof. Specifically, it is a double-terminal carboxyl PA6 prepolymer prepared by hydrolysis ring-opening polymerization, then adding diol for esterification, and finally adding polyglycol and cross-linking agent to prepare PA6 series thermoplastic with appropriate chemical cross-linking points. Elastic approach. Background technique [0002] Polyamide thermoplastic elastomer is a kind of thermoplastic elastomer that is easy to process and has excellent performance. It is a block copolymer composed of polyamide hard segment and polyether soft segment. [0003] PA6 series thermoplastic elastomer is a kind of polyamide thermoplastic elastomer, which is a semi-crystalline block copolymer with PA6 as the hard segment and polyether as the soft segment. The synthesis methods can be generally divided into two categories: one is hydrolytic ring-opening pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00
CPCC08G81/00
Inventor 李发学袁如超吴德群王学利俞建勇
Owner DONGHUA UNIV
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