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A kind of preparation method of high ethylene oxide polyether

A high ethylene oxide polyether and polyether technology, which is applied in the field of polymer synthesis, can solve the problems of poor mechanical properties, poor activity stability, and many side reactions, and achieves reduced water content, good physical and chemical properties, and improved activity. Effect

Active Publication Date: 2016-05-11
浙江永杰汽车电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of the automobile industry, metal and PVC materials are likely to cause occupants to be injured. Therefore, a large number of lightweight, composite materials, and polymer materials such as plastics are used in automobile dashboard frames and sealants. Poor activity stability and high water content lead to many side reactions in the production process, poor mechanical properties, poor dimensional stability, low tensile strength and elongation at break, and poor weather resistance. How to improve the stability of polyether products Sex and reduce the water content of the product is the problem to be solved in this application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A. Preparation of Intermediates

[0019] (1) Put 150kg of KOH into the 5-square kettle and replace it with nitrogen once, then put 1723kg of glycerin into it.

[0020] (2) Nitrogen replacement 5 times (after the vacuum reaches -0.098MPa, nitrogen is added until the pressure is 0MPa), the steam valve is opened, and the temperature rises to 95~105℃.

[0021] (3) When the pressure reaches -0.098Mpa, nitrogen blowing dehydration starts. The nitrogen blowing dehydration temperature is controlled at 145~155°C, and the nitrogen blowing dehydration time is 5 hours. The opening controls the size of the steam to control).

[0022] (4) Close the vacuum valve, fill nitrogen to positive pressure (0.03-0.5Mpa), sample analysis, moisture ≤ 0.05%, if the moisture is unqualified, continue nitrogen dehydration until it is qualified (the positive pressure in the kettle must be maintained during sampling); after the moisture is qualified , The pressure of the 5-square kettle is increased...

Embodiment 2

[0048] A. Preparation of Intermediates

[0049] (1) Put 106kg of KOH into the 5-square kettle, replace with nitrogen once, and then put in 1498kg of glycerin.

[0050] (2) Nitrogen replacement 5 times (after the vacuum reaches -0.098MPa, nitrogen is added until the pressure is 0MPa), the steam valve is opened, and the temperature rises to 95~105℃.

[0051] (3) When the pressure reaches -0.098Mpa, nitrogen blowing dehydration starts. The nitrogen blowing dehydration temperature is controlled at 145~155°C, and the nitrogen blowing dehydration time is 4 hours. The opening controls the size of the steam to control).

[0052] (4) Close the vacuum valve, fill nitrogen to positive pressure (0.03-0.5Mpa), sample analysis, moisture ≤ 0.05%, if the moisture is unqualified, continue nitrogen dehydration until it is qualified (the positive pressure in the kettle must be maintained during sampling); after the moisture is qualified , The pressure of the 5-square kettle is increased to 0.1...

Embodiment 3

[0078] A. Preparation of Intermediates

[0079] (1) Put 413kg of KOH into the 5-square kettle, replace with nitrogen once, and then put in 3055kg of glycerin.

[0080] (2) Nitrogen replacement 5 times (after the vacuum reaches -0.098MPa, nitrogen is added until the pressure is 0MPa), the steam valve is opened, and the temperature rises to 100~105°C.

[0081](3) When the pressure reaches -0.098Mpa, nitrogen blowing dehydration starts. The nitrogen blowing dehydration temperature is controlled at 145~155°C, and the nitrogen blowing dehydration time is 6 hours. The opening controls the size of the steam to control).

[0082] (4) Close the vacuum valve, fill nitrogen to positive pressure (0.03-0.5Mpa), sample analysis, moisture ≤ 0.05%, if the moisture is unqualified, continue nitrogen dehydration until it is qualified (the positive pressure in the kettle must be maintained during sampling); after the moisture is qualified , The pressure of the 5-square kettle is increased to 0....

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Abstract

The invention relates to a preparation method of high ethylene oxide polyether, which belongs to the technical field of high polymer synthesis. Using glycerol as a starting agent and alkaline hydroxide as a catalyst, an intermediate is first synthesized, and then a high ethylene oxide polyether is synthesized based on the intermediate, and the addition method and preparation method provided by the present invention can be The distribution of ethylene oxide in the polyether molecular structure is more, the ethylene oxide group is more distributed on the main chain, the molecular weight distribution becomes better, the mechanical properties and thermal decomposition properties are better than conventional products, and the reactivity is greatly improved , reducing the difficulty of the reaction.

Description

technical field [0001] The invention relates to a preparation method of high ethylene oxide polyether, which belongs to the technical field of high polymer synthesis. Background technique [0002] With the development of the automobile industry, metal and PVC materials are likely to cause occupants to be injured. Therefore, a large number of lightweight, composite materials, and polymer materials such as plastics are used in automobile instrument panel skeletons and sealants. Poor activity stability and high water content lead to many side reactions in the production process, poor mechanical properties, poor dimensional stability, low tensile strength and elongation at break of the product, and poor weather resistance. How to improve the stability of polyether products Sexuality and reducing the water content of the product are the problems to be solved in this application. [0003] Based on this, this application is made. Contents of the invention [0004] In order to o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/28C08G65/30
Inventor 成莉莉欧文武
Owner 浙江永杰汽车电子有限公司
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