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Polyether glycol, preparation method thereof, and foam material

A polyether polyol and reaction technology, applied in the field of polyol compounds, can solve problems such as poor flame retardancy, and achieve the effects of good flame retardancy, shortened foaming time, and high reactivity

Inactive Publication Date: 2017-05-17
于天荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This polyether polyol has poor flame retardancy when used as a foaming material, etc.

Method used

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  • Polyether glycol, preparation method thereof, and foam material
  • Polyether glycol, preparation method thereof, and foam material
  • Polyether glycol, preparation method thereof, and foam material

Examples

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preparation example Construction

[0044] The preparation method of polyether polyol of the present invention may further comprise the steps:

[0045] Provide N-hydroxyethyl oxazolidine;

[0046] Mannich bases are provided, said Mannich bases are subjected to Mannich reactions from unsubstituted or alkyl substituted phenols and N-hydroxyethyloxazolidine;

[0047] And, ring-opening addition of the Mannich base and unsubstituted or alkyl-substituted oxirane.

[0048] In the above preparation method, N-hydroxyethyl oxazolidine is formed by dehydration and cyclization reaction of paraformaldehyde and diethanolamine. Its reaction equation is, This reaction is an equilibrium endothermic reaction.

[0049] The temperature of the dehydration cyclization reaction is preferably 50-70° C., and the reaction time is for reference 1.5-2.5 hours, preferably 2 hours. After the reaction is completed, a treatment for separating water may be performed. The separated water is preferably treated until the water content in the...

Embodiment 1

[0061] Put diethanolamine and paraformaldehyde into a three-necked flask, and heat it to about 50 to start the reaction. After 2.5 hours of reaction, dehydration was carried out at 80°C. In the later stage of dehydration, the effect of dehydration can be improved by blowing nitrogen gas. When the tested water content is 0.5%, the dehydration treatment is completed to obtain N-hydroxyethyl oxazolidine, which is ready for use.

[0062] Transfer nonylphenol and N-hydroxyethyl oxazolidine into the reaction kettle (the relevant parameters of the reaction kettle are: negative pressure is -0.10Mpa, with heating, the maximum temperature is 100°C), and the reaction temperature is controlled to be 80°C , Reaction 3h, to obtain Mannich base.

[0063] Transfer the Mannich base of the above product into an autoclave (the relevant parameters of the reactor are: negative pressure is -0.10 ~ 0.4Mpa, with heating, the maximum temperature is 110°C), vacuumize and replace with nitrogen for 3 t...

Embodiment 2

[0065] Put diethanolamine and paraformaldehyde into a three-necked flask, and heat it to about 70°C to start the reaction. After 1.5 hours of reaction, dehydration was carried out at 100°C. In the later stage of dehydration, the effect of dehydration can be improved by blowing nitrogen gas. When the tested water content is 1%, the dehydration treatment is completed, and N-hydroxyethyl oxazolidine is obtained for future use.

[0066] Transfer nonylphenol and N-hydroxyethyl oxazolidine into the reaction kettle (the relevant parameters of the reaction kettle are: negative pressure is -0.10Mpa, with heating, the maximum temperature is 100°C), and the reaction temperature is controlled at 90°C , Reaction 2h, to obtain Mannich base.

[0067] Transfer the Mannich base of the above product into an autoclave (the relevant parameters of the reactor are: negative pressure is -0.10 ~ 0.4Mpa, with heating, the maximum temperature is 110°C), vacuumize and replace with nitrogen for 3 times...

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Abstract

The invention discloses polyether glycol, a preparation method thereof, and a foam material. The polyether glycol is a polymer prepared through ring-opening addition of mannich base and non-substituted or alkyl-substituted ethylene oxide, wherein the mannich base is a product obtained through mannich reaction of non-substituted or alkyl-substituted phenol and N-hydroxyethyl oxazolidine. According to the polyether glycol provided by the invention, a benzene ring is contained in a molecular structure, so that the polyether glycol has better fire resistance. In addition, the polyether glycol provided by the invention has higher reaction activity, and can be beneficial for shortening the foaming time when being used as the foam material. In addition, the preparation method provided by the invention adopts a reaction still as a reaction device, so that the reaction efficiency is greatly improved, and the preparation time is shortened.

Description

technical field [0001] The invention relates to the technical field of polyol compounds, in particular to polyether polyols, a preparation method thereof, and a foaming material. Background technique [0002] Polyether polyol (referred to as polyether) is an oligomer containing ether bonds (-R-O-R-) in the main chain and more than 2 hydroxyl groups (-OH) in the end group or side group. It is prepared by polyaddition reaction of initiator (compound containing active hydrogen group) and ethylene oxide (EO), propylene oxide (PO), butylene oxide (BO) in the presence of a catalyst. Polyether polyols have the following uses: 1. Detergents or defoamers L61, L64, F68 are used to prepare low-foaming, high-detergency synthetic detergents; L61 and L81 are used as defoamers in papermaking or fermentation industries agent; F68 is used as a defoamer in artificial heart-lung machine blood circulation to prevent air from entering. 2. Excipients and emulsifiers. Polyether has low toxicity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26C08G18/50C08G101/00
CPCC08G18/5021C08G65/2618C08G65/2627C08G2101/00
Inventor 于天荣
Owner 于天荣
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