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Preparation method for low poly-cationic surfactant

A technology of surfactants and polycations, applied in chemical instruments and methods, dissolution, chemical/physical processes, etc., can solve the problems of cumbersome steps, long reaction cycle, low yield, etc., and achieve good application prospects, high viscosity, The effect of overcoming the chromatographic separation phenomenon

Inactive Publication Date: 2009-02-18
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method overcomes the disadvantages of conventional methods (one-step method and multi-step method) such as cumbersome steps, long reaction cycle, and low yield.

Method used

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  • Preparation method for low poly-cationic surfactant
  • Preparation method for low poly-cationic surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 6.5 grams of DM12 and 0.43 grams of ethyl 2-bromo-2-methylpropionate, put them into 50 ml of a mixed solution of isopropanol and water with a weight ratio of 1:1, stir to dissolve them, and wait until the dissolution is complete Nitrogen gas was passed in for 60 minutes while stirring constantly. Under nitrogen protection, 0.2 g of CuCl and 0.47 g of bipyridine were added and stirred continuously for 3 hours to stop the reaction.

Embodiment 2

[0029] Weigh 6.5 grams of DM12 and 0.43 grams of ethyl 2-bromo-2-methylpropionate, put them into 50 ml of a mixed solution of n-propanol and water with a weight ratio of 1:1, stir to dissolve them, and wait until the dissolution is complete Nitrogen gas was passed through for 30 minutes while stirring constantly. Under nitrogen protection, 0.2 g of CuCl and 0.47 g of bipyridine were added and stirred continuously for 4 hours to stop the reaction.

Embodiment 3

[0031] Weigh 6.5 grams of DM12 and 0.33 grams of methyl 2-bromo-2-methylpropionate, put them into 50 ml of ethanol and water mixed solution with a weight ratio of 2:1, stir to dissolve them, and pass Infuse nitrogen for 40 minutes, stirring constantly. Under the protection of nitrogen, 0.26 g of CuBr and 0.47 g of bipyridine were added, and the mixture was stirred continuously for 5 hours to stop the reaction.

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Abstract

The invention discloses a preparation method for an oligomerization cation surfactant. The method comprises the following steps of: (A) dissolving the prepared acrylamide with a long alkyl chain and a quaternary ammonium salt structure in a mixed liquid of water and alcohol; (B) adding nitrogen gas into the solution to remove oxygen, and adding an initiator, a catalyst and a ligand; and (C) reacting at a room temperature under the protection of the nitrogen gas.

Description

technical field [0001] The invention relates to a preparation method of an oligomeric cationic surfactant, which belongs to the technical field of chemical industry. Background technique [0002] Oligomeric surfactants are a new class of surfactants formed by linking two or more amphiphilic components at or near the head group by a linking group through chemical bonds. , if its hydrophilic group is a quaternary ammonium salt, it is an oligomeric cationic surfactant. Compared with traditional surfactants, it has extremely high surface activity, low Kraft point and good water solubility, and some have thickening properties comparable to polymer surfactants. The molecular weight of oligomeric surfactants is usually between traditional surfactants and polymeric surfactants. Its appearance builds a bridge between the two. It is known as a new generation of surfactants and is most likely to become A class of surfactants widely used in the 21st century. However, the conventional...

Claims

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Application Information

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IPC IPC(8): B01F17/00C09K23/00
Inventor 冯玉军苏鑫
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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