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Preparation method of long-carbon-chain nylon elastomer

A technology of nylon elastomer and long carbon chain, which is applied in the field of preparation of long carbon chain nylon elastomer, can solve the problem of low molecular weight of polyamide elastomer, achieve the effect of increasing molecular weight, saving time and simple process

Active Publication Date: 2020-01-07
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the molecular weight of the polyamide elastomer directly prepared by the reactor is relatively low, and its performance can be further improved by increasing the molecular weight. Therefore, it is necessary to improve the previous preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 300g of undecanedioic acid, 278g of dodecanediamine, 400g of PEG-1000, 2g of tetrabutyl titanate, and 200g of water were weighed and put into the reaction kettle at one time.

[0025] The reaction kettle was replaced with nitrogen to remove the oxygen in the system to prevent oxidation. At the same time, the temperature was raised to 170°C, and the pre-reaction was carried out and kept for 30 minutes to ensure that the reaction was complete.

[0026] After the heat preservation is over, the reaction is exhausted to make the internal pressure of the system become normal pressure, and the heat preservation is carried out for 2 hours to ensure that the reaction is completely completed.

[0027] Afterwards, vacuumize the reaction system to exhaust the water vapor in the system, and at the same time raise the temperature to 280 ° C. At this time, the pressure in the reaction system is 1000 Pa. After continuous reaction for 3 hours, the material is discharged. At this time, th...

Embodiment 2

[0031] Weigh 140g of sebacic acid, 100g of decanediamine, 500g of PTMG-3000, 2g of tetrabutyl titanate, and 100g of water, and put them into the reaction kettle at one time.

[0032] The reaction kettle was replaced with nitrogen to remove the oxygen in the system to prevent oxidation. At the same time, the temperature was raised to 170°C, and the pre-reaction was carried out and kept for 30 minutes to ensure that the reaction was complete.

[0033] After the heat preservation is over, the reaction is exhausted to make the internal pressure of the system become normal pressure, and the heat preservation is carried out for 2.5 hours to ensure that the reaction is complete.

[0034] Afterwards, vacuumize the reaction system to exhaust the water vapor in the system to ensure that the reaction proceeds. At the same time, the temperature is raised to 280 ° C. At this time, the pressure in the reaction system is 1000 Pa. After continuous reaction for 5 hours, the material is discharg...

Embodiment 3

[0038] Weigh 200g of dodecanedioic acid, 180g of undecanediamine, 400g of PTMG-1500, 2g of tetrabutyl zirconate, and 200g of water, and put them into the reaction kettle at one time.

[0039] The reaction kettle was replaced with nitrogen to remove the oxygen in the system to prevent oxidation. At the same time, the temperature was raised to 175°C, and the pre-reaction was carried out and kept for 30 minutes to ensure that the reaction was complete.

[0040] After the heat preservation is over, the reaction is exhausted to make the internal pressure of the system become normal pressure, and the heat preservation is carried out for 2.5 hours to ensure that the reaction is complete.

[0041]Afterwards, vacuumize the reaction system to exhaust the water vapor in the system to ensure that the reaction proceeds. At the same time, the temperature is raised to 260 ° C. At this time, the pressure in the reaction system is 800 Pa. After continuous reaction for 3.5 hours, the material is...

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Abstract

The invention discloses a preparation method of a long-carbon-chain nylon elastomer, and belongs to the technical field of nylon elastomers. The preparation method comprises the following steps: preparing a polyether glycol or polyester glycol terminated long-carbon-chain nylon elastomer oligomer by a one-step method, and carrying out reactive extrusion on the long-carbon-chain nylon elastomer oligomer and a diisocyanate chain extender in a twin-screw extruder to obtain the long-carbon-chain nylon elastomer. The prepared long-carbon-chain nylon elastomer has higher molecular weight, the preparation process is simple, continuous industrial production is easy to realize, and the long-carbon-chain nylon elastomer can be applied to the fields of medical treatment, sports equipment, mechanicalparts and the like.

Description

technical field [0001] The invention relates to the field of preparation of thermoplastic elastomers, in particular to a preparation method of long carbon chain nylon elastomers. [0002] technical background [0003] Thermoplastic elastomers are composed of hard segments and soft segments, which are microphase-separated structures. When the material is subjected to force, the soft segment is in a viscous fluid state, while the hard segment is in a glassy or crystalline state, making the soft segment The molecular chain of the segment can undergo chain motion to a certain extent, while the hard segment acts as a cross-linking point to prevent the material from breaking and limit deformation. After the force disappears, the material can return to the original state due to the chain motion, so it has elasticity. The biggest advantage of thermoplastic elastomers is that when heated, the hard segment can also move, so it has a good processing performance and can be processed rep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/40C08G18/60C08G18/76C08G18/75
CPCC08G18/603C08G18/755C08G18/7614C08G69/40
Inventor 潘凯桂源黄国桃吕玉环
Owner BEIJING UNIV OF CHEM TECH
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