N-maleimide-N-sodium isethionate and method for preparing same

A technology of maleimide and sodium ethylsulfonate, applied in the field of material preparation

Inactive Publication Date: 2018-01-30
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional polycarboxylate superplasticizers are mainly anionic superplasticizers, and there are big differences between traditional polycarboxylate superplasticizers and amphoteric polycarboxylate superplasticizers in terms of mechanism and effect

Method used

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  • N-maleimide-N-sodium isethionate and method for preparing same
  • N-maleimide-N-sodium isethionate and method for preparing same
  • N-maleimide-N-sodium isethionate and method for preparing same

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Experimental program
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preparation example Construction

[0025] A kind of preparation method of above-mentioned N-maleimide-N-sodium ethylsulfonate, the steps are as follows:

[0026] Put the ethanol solution of 10wt%-30wt% maleic anhydride in the reactor, heat slowly at a heating rate of 2°C / min, when the temperature rises to 60-70°C, add 10wt%-30wt% 2-aminoethyl The sodium sulfonate aqueous solution and the ethanol solution of 10wt%-30wt% catalyst are slowly dropped into the reactor at the same time, the dropping time is 1-2h, the reaction temperature is 60-70°C; the reaction is 6-8h. After the reaction, excessive ethanol was added to the reactor, and the product was precipitated from the system, and filtered, washed and dried to obtain refined N-maleimide-N-sodium ethylsulfonate; 2- The mass ratio of sodium amino ethyl sulfonate, maleic anhydride and catalyst is 1:0.8-1.2:0.2-0.5.

[0027] In the step, the catalyst is one or both of triethanolamine, sodium hydroxide and potassium hydroxide.

Embodiment 1

[0029] N-maleimide-N-sodium ethylsulfonate is made from the following raw materials in parts by weight:

[0030] Sodium 2-aminoethylsulfonate 10 parts

[0031] 10 parts maleic anhydride

[0032] 10 parts of triethanolamine.

[0033] The preparation method of above-mentioned N-maleimide-N-ethylsulfonate sodium, the steps are as follows:

[0034] Dissolve 10 g of maleic anhydride in 90 g of ethanol, place it in a reactor, and heat it slowly at a heating rate of 2° C. / min. When the temperature rises to 60°C, dissolve 8g of sodium 2-aminoethylsulfonate in 72g of aqueous solution and 2g of triethanolamine in 18g of ethanol solution and slowly drop them into the reactor at the same time, the dropping time is 1h, and the reaction temperature is 60°C ; Reaction 6h. After the reaction is finished, excess ethanol is added into the reactor, and the product is precipitated from the system, filtered, washed and dried to obtain refined N-maleimide-N-ethylsulfonate sodium.

Embodiment 2

[0036] N-maleimide-N-sodium ethylsulfonate is made from the following raw materials in parts by weight:

[0037] Sodium 2-aminoethylsulfonate 20 parts

[0038] 20 parts maleic anhydride

[0039] 20 parts of sodium hydroxide.

[0040] The preparation method of above-mentioned N-maleimide-N-ethylsulfonate sodium, the steps are as follows:

[0041] Dissolve 20g of maleic anhydride in 80g of ethanol, place it in a reactor, and heat it slowly at a heating rate of 2°C / min. When the temperature rises to 65°C, 20g of sodium 2-aminoethylsulfonate dissolved in 80g of aqueous solution and 8g of sodium hydroxide dissolved in 32g of ethanol solution are slowly dropped into the reactor at the same time, the time of dropping is 1.5h, and the reaction temperature is 65°C; Reaction for 7h. After the reaction is finished, excess ethanol is added into the reactor, and the product is precipitated from the system, filtered, washed and dried to obtain refined N-maleimide-N-ethylsulfonate sodium...

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Abstract

The invention discloses N-maleimide-N-sodium isethionate. The N-maleimide-N-sodium isethionate is characterized by comprising, by weight, 10-30 parts of 2-amine ethanesulfonic acid, 10-30 parts of maleic anhydride and 10-30 parts of catalysts. The N-maleimide-N-sodium isethionate has the advantages that anion active groups and cation active groups are simultaneously led into active monomers and can be copolymerized with other active monomers to obtain amphoteric polycarboxylate water reducing agents, effects of repetitive units in polymer molecules can be improved under the synergistic effectsof the anion active groups and the cation active groups in the active monomers, and accordingly the application performance of the polycarboxylate water reducing agents can be improved.

Description

technical field [0001] The present invention relates to the synthesis of a kind of N-maleimide-N-ethylsulfonate sodium and its preparation method, N-maleimide-N-ethylsulfonate sodium can be used as an amphoteric The active monomer is used in the polycarboxylate water reducer, and the invention also relates to a preparation method of this substance. Background technique [0002] Traditional polycarboxylate-based water reducers are mainly anionic water-reducers, and there are big differences between traditional polycarboxylate-based water-reducers and amphoteric polycarboxylate-based water-reducers in terms of mechanism and effect. Amphoteric polycarboxylate water reducer is based on the traditional polycarboxylate water reducer, introducing cationic active groups into polymer molecules. It is an anionic active monomer, such as acrylic acid, methyl methacrylate An amphoteric polymer obtained by copolymerizing monomers such as esters and cationic active monomers such as acrylo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F228/02C08F222/06C04B24/16C04B103/30
Inventor 王海玥李继新郭立颖
Owner SHENYANG POLYTECHNIC UNIV
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