Method for preparing N-hydroxymethyl alkyl acrylamide

A technology of methylol alkyl acrylamide and alkyl acrylamide, which is applied in the field of preparation of N-methylol alkyl acrylamide, can solve the problems such as no product preparation method has been found, and achieve easy polymerization and good storage stability , the effect of low energy consumption

Inactive Publication Date: 2008-01-16
FEIXIANG CHEM ZHANGJIAGANG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Method for preparing N-hydroxymethyl alkyl acrylamide
  • Method for preparing N-hydroxymethyl alkyl acrylamide

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Take 188g of deionized water, add it into a 2000ml four-necked bottle, and start stirring. Add 485g of methacrylamide, control the temperature at 38-40°C, adjust the pH to 10.0-11.0 with an alkali solution with a mass concentration of 5%, and add 320g of formaldehyde aqueous solution. Constantly replenish the alkaline solution to keep the pH between 9.0 and 11.0, and react until the solution is clear. Then, keep warm at 40° C. for 2 to 2.5 hours. Add a certain amount of H 2 SO 4 , adjust the pH to 6-7, and stir for 5 minutes. Finally, 0.2 g of polymerization inhibitor was added and stirred thoroughly to obtain a uniform and stable aqueous solution product.

Embodiment 2

[0018] Take 390g of deionized water, add it into a 2000ml four-necked bottle, and start stirring. Add 490 g of methacrylamide, control the temperature at 20-25° C., and adjust the pH to 9.0-11.0 with an alkali solution with a mass concentration of 5%. The temperature was raised to 30-35°C, and 137g of paraformaldehyde was added. Raise the temperature to 38-40°C. Constantly replenish the alkaline solution to keep the pH between 9.0 and 11.0, and react until the solution is clear. Then keep it warm at 38°C for 2-3 hours, add H 2 SO 4 , adjust the pH to 6-7, and stir for 5 minutes. Finally, 0.15 g of polymerization inhibitor was added and stirred thoroughly to obtain a uniform and stable aqueous solution product.

Embodiment 3

[0020] Take 390g of deionized water, add it into a 2000ml four-necked bottle, and start stirring. Add 490g of methacrylamide, control the temperature at 30-35°C, and add 137g of paraformaldehyde. Raise the temperature to 38-40°C. Adjust the pH to between 9.0 and 11.0 with an alkali solution with a mass concentration of 5%, and react until the solution is clear. Then keep it warm at 38°C for 2-3 hours, add H 2 SO 4 , adjust the pH to 6-7, and stir for 5 minutes. Finally, 0.15 g of polymerization inhibitor was added and stirred thoroughly to obtain a uniform and stable aqueous solution product.

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Abstract

The present invention discloses an environmental-friendly preparation method of N-hydroxymethyl-alkyl acrylamide, which is simple in process and mainly comprises the following steps: formaldehyde generating agent is added to the aqueous solution of alkyl acrylamide for reaction; in the reaction process, alkaline substances are used to control the pH value of the reaction solution between 9.0 and 11.0, and the reaction temperature is controlled to 20-50 DEG C; after the reaction solution is clarified, acidic substances are added to adjust the pH value of the reaction solution between 6 to 7; finally a proper amount of polymerization inhibitor is added to the solution, so that the transparent N-hydroxymethyl-alkyl acrylamide aqueous solution product. The product prepared through the method of the invention can be used to prepare acrylic resin dry strengthening agent and humidification strengthening agent.

Description

technical field [0001] The invention relates to a preparation method of N-methylol alkyl acrylamide. Background technique [0002] N-Methylolalkylacrylamide is a cross-linking agent for ethylenic monomers. Its product forms include powder and aqueous solution. It can be copolymerized with other acrylic monomers to prepare acrylic resin drying and strengthening agents with higher binding activity. and moisturizer. Used as a cross-linking monomer in coating agents, it can improve the water resistance and solvent resistance of the film. At present, there is no relevant report on the preparation method of the product. Contents of the invention [0003] The purpose of the present invention is to provide a simple process, and the preparation method of N-methylol alkylacrylamide which is green and environment-friendly. [0004] In order to achieve the above object, the technical solution adopted in the present invention is: the preparation method of the N-methylol alkylacrylam...

Claims

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Application Information

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IPC IPC(8): C07C233/20C07C231/12
Inventor 黄德周易先春李胜兵陈军冯志德
Owner FEIXIANG CHEM ZHANGJIAGANG
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