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Method for preparing polyether amide material

A polyether amide and polyether amine technology, which is applied in the field of preparing polyether amide materials, can solve the problems of low glass transition temperature, difficult regulation and optimization, complex reaction system, etc., and achieves excellent performance, simple and easy operation, high The effect of toughness

Active Publication Date: 2012-10-24
WUXI ACRYL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with nylon 66, this modified material has a lower glass transition temperature, stronger impact resistance, and lower modulus, but it will cause phase separation problems and make the reaction system complex, difficult to control and optimize
US5053484 reports a method for preparing polyetheramide from polyetheramine, using the adipate salt of polyetheramine with a larger molecular weight (Mn≥500) and the adipic acid salt of polyetheramine with a small molecular weight (Mn=148 or 192, etc.) Polyether amide products are obtained by copolymerization of acid salts, but the reaction system is complex, requiring a variety of polyether amines to be mixed together for use, the product color is brown, and the practical value is small
In summary, although polyetheramine can play a certain role in improving polyamide modification, the methods reported so far have not fundamentally improved the defects of polyamide products.

Method used

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  • Method for preparing polyether amide material
  • Method for preparing polyether amide material
  • Method for preparing polyether amide material

Examples

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preparation example Construction

[0029] In the method for preparing polyether amide materials described in the present invention, in order to promote the reaction to carry out as far as possible thoroughly and improve the molecular weight of product polyether amide, and reduce the degree of dispersion of macromolecule product, must control the quality of salt, pre- Several key factors such as polycondensation time, stirring speed, post-polycondensation time, and water removal.

[0030] Salt quality: When synthesizing polyetheramine-diacid salt, it is necessary to prepare the ethanol solution of polyetheramine in advance to control the speed of the salt-forming reaction; Stir until the ethanol solution of the diacid is completely dissolved; then use a constant pressure dropping funnel to slowly drop the ethanol solution of polyetheramine into the ethanol solution of the diacid; the whole process is completed under the condition of a constant temperature water bath at 40~50°C , It can be seen that factors such ...

Embodiment 1

[0034] Embodiment one: a kind of method for preparing polyether amide material, comprises the following steps:

[0035] Preparation of polyetheramine-diacid salt:

[0036] (1) Measure 250ml of absolute ethanol in a 500ml container, and keep it in a constant temperature water bath at 40°C for 30 minutes; weigh 46.836g of adipic acid (with a carboxyl content of 0.6mol), and gradually add the adipic acid to the In 250ml absolute ethanol, make it fully dissolve, obtain the ethanol solution of adipic acid, stirring speed is 200 rev / mins;

[0037] (2) Weigh 53.333g of EDR-176 (the content of amine group is 0.6mol), and dilute it with 50mL of absolute ethanol to obtain the ethanol solution of EDR-176;

[0038] (3) Slowly drop the ethanol solution of EDR-176 into the ethanol solution of adipic acid under the condition of stirring with constant pressure dropping funnel, the dropping speed is 1 drop / second, and the dropping temperature is 40°C; , continue to stir for 1 hour, and the s...

Embodiment 2

[0050] Embodiment two: a kind of method for preparing polyether amide material, comprises the following steps:

[0051] Preparation of polyetheramine-diacid salt:

[0052] (1) Measure 250ml of absolute ethanol in a 500ml container and keep it in a constant temperature water bath at 50°C for 30 minutes; weigh 46.836g of adipic acid (with a carboxyl content of 0.6mol), and gradually add the adipic acid to the In 250ml absolute ethanol, make it fully dissolve, obtain the ethanol solution of adipic acid, stirring speed is 300 rev / mins;

[0053] (2) Weigh 53.333g of EDR-176 (the content of amine group is 0.6mol), and dilute it with 50mL of absolute ethanol to obtain the ethanol solution of EDR-176;

[0054] (3) Slowly drop the ethanol solution of EDR-176 into the ethanol solution of adipic acid under the condition of stirring with constant pressure dropping funnel, the dropping speed is 2 drops / second, and the dropping temperature is 50°C; , continue to stir for 1.5 hours at a st...

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Abstract

The invention relates to a method for preparing a polyether amide material, which comprises the following process steps of (1) dripping ethanol solution of polyetheramine to ethanol solution of diacid to obtain ethanol solution of polyetheramine and diacid, removing ethanol with a rotary evaporator, and drying to obtain polyetheramine-diacid salt; (2) mixing the polyetheramine-diacid salt with water to obtain salt solution, and carrying out prepolymerization on the salt solution under the conditions of stirring and nitrogen gas protection to obtain prepolymer; and (3) continuing raising the temperature to carry out heating dewatering and polycondensing on the prepolymer obtained in the step (2), introducing nitrogen gas to bubble and remove residual moisture in the prepolymer during the heating dewatering and polycondensing process, and discharging moisture by a moisture separator to obtain the polyether amide material. According to the invention, an improved process method of salification / pre-polycondensing / polycondensing is adopted, so that the polyether amide material with high molecular weight, low dispersion degree, high heat stability, high toughness and excellent hygroscopicity is prepared.

Description

technical field [0001] The invention relates to a method for preparing a polyether amide material, in particular to a polyether amide material which can be used for melt spinning, preparing fabrics, water vapor permeable membranes, rubber, etc., and belongs to the technical field of new materials. Background technique [0002] Traditional polyamides used in textile fiber materials have defects such as low moisture regain, poor air permeability and dyeability, which limit their application fields. Therefore, research on the modification of polyamide materials has always attracted the attention of scientific researchers. Polyamide modification methods include physical modification and chemical modification. Physical modification includes blending different nylon varieties and adding some additives to nylon materials. Chemical modification is a method of introducing new structural units, polymer chains or functional groups into the main chain or side chain of polyamide molecul...

Claims

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Application Information

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IPC IPC(8): C08G69/40
Inventor 张松林丁玉强施瑛范慧军张文泉尤卫民
Owner WUXI ACRYL TECH
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