Dialkylene amine polyether and preparation method and application thereof

A technology of dienyl amine polyether and dienyl amine, which is applied in the application field of high molecular polymer synthesis, can solve the problems of difficult performance improvement of polycarboxylate water reducer and single type of polyether macromonomer. , to achieve excellent slump retention performance, high double bond retention rate and easy controllable conditions

Inactive Publication Date: 2014-05-21
联泓新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on polycarboxylate superplasticizers is only limited to the copolymerization of different polyether macromonomers and different unsaturated carboxylic acids, and the types of polyether macromonomers selected are relatively single, making polycarboxylate superplasticizers Difficult to get substantial improvement in performance

Method used

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  • Dialkylene amine polyether and preparation method and application thereof
  • Dialkylene amine polyether and preparation method and application thereof
  • Dialkylene amine polyether and preparation method and application thereof

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preparation example Construction

[0038] The embodiment of the present invention also provides a method for preparing a dienylamine polyether, comprising the following steps:

[0039] (1) Under negative pressure, add dienyl amine and catalyst to the reactor, fill the reactor with nitrogen to replace the air in the reactor, heat the material in the reactor to 90-100°C, slowly add alkylene oxide to Formation reaction, the reaction temperature is 90-130°C, the reaction pressure is less than 0.5MPa, after adding the alkylene oxide, keep the temperature at 90-130°C for at least 30 minutes, and then cool down to 50-80°C; among them, dienylamine and cyclic The molar ratio of oxyalkane is 1: (2-12).

[0040] (2) Add catalyst to the reactor, then fill the reactor with nitrogen to replace the air in the reactor, vacuumize, heat to 90-100°C, then add alkylene oxide for addition reaction, the reaction temperature is 90-130°C, the reaction The pressure is less than 0.5MPa. After adding the alkylene oxide, keep it warm at ...

Embodiment 1

[0044] Diisobutenylamine polyoxyethylene ether, its preparation method is as follows:

[0045]In the first step, put 125 grams of diisobutenylamine and 1.0 grams of sodium methoxide into a clean and dry 4L reaction kettle under negative pressure as a catalyst, replace the air in the kettle with nitrogen, and heat the material to 90-100°C , stop heating, slowly add ethylene oxide to carry out the addition reaction, the reaction temperature is 95 ~ 120 ℃, the reaction pressure is less than 0.5MPa, the addition of ethylene oxide is 275 grams in total, after adding ethylene oxide, at 95 ~120°C heat preservation reaction for at least 30 minutes, until the pressure in the kettle no longer drops, then lower the temperature and cool to 50~80°C.

[0046] In the second step, the reaction kettle of the first step is evacuated, and 4.8 grams of methanol solution of 50% sodium methylate is added under the condition of negative pressure as a catalyst, and then the air in the nitrogen replac...

Embodiment 2

[0048] Diisobutenylamine polyoxyethylene ether, its preparation method is as follows:

[0049] In the first step, put 125 grams of diisobutenylamine and 1.0 grams of sodium methoxide into a clean and dry 4L reaction kettle under negative pressure as a catalyst, replace the air in the kettle with nitrogen, and heat the material to 90-100°C , stop heating, slowly add ethylene oxide to carry out the addition reaction, the reaction temperature is 95 ~ 120 ℃, the reaction pressure is less than 0.5MPa, the addition of ethylene oxide is 275 grams in total, after adding ethylene oxide, at 95 ~120°C heat preservation reaction for at least 30 minutes, until the pressure in the kettle no longer drops, then lower the temperature and cool to 50~80°C.

[0050] In the second step, the reaction kettle of the first step is evacuated, and 9.0 grams of methanol solution of 50% sodium methylate is added as a catalyst under the condition of negative pressure, and then the air in the nitrogen repla...

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Abstract

The invention discloses a dialkylene amine polyether and a preparation method and application thereof. The dialkylene amine polyether is expressed by adopting the following structural formula (1), (img file= 'DSA0000101280160000011.tif' wi= '1420' he= '274' / ), wherein R1 and R2 are alkenyl of which the carbon number is 3-10; m is greater than 1; n is greater than or equal to 0; q is greater than or equal to 0. The dialkylene amine polyether provided by the invention has two unsaturated chain segments and good polymerization activity, and can be applied to synthesis of polymer dispersant and polycarboxylate high-performance water-reducing admixture products, and the dispersibility of each product can be improved. The dialkylene amine polyether provided by the invention is simple in preparation method, easy to control condition, stable and safe in reaction, high in productivity, free of use of an organic solvent, and free of generation of a harmful substance to a human body, and environmental pollution is avoided. Application of the dialkylene amine polyether in synthesis of an industrial high-molecular polymer is also provided by the invention.

Description

technical field [0001] The invention relates to a polyether, in particular to a dienylamine polyether, its preparation method and its application in the synthesis of high molecular polymers used in industry. Background technique [0002] With the rapid development of the concrete industry, more and more people pay attention to the preparation of high-performance concrete by using concrete water-reducing agents. Among them, polycarboxylate water-reducing agents have become a hot research topic at home and abroad. This type of water-reducing agent has many unique features. Advantages, such as high water reducing rate, good slump retention under low water-cement ratio conditions, relatively good adaptability to different cements, etc. [0003] At present, polycarboxylate water reducers are mainly prepared by copolymerizing reactive polyether macromonomers containing unsaturated bonds and unsaturated carboxylic acids. Among them, the most widely used reactive polyether macromon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26
Inventor 来存远牛峰李磊李方
Owner 联泓新材料科技股份有限公司
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