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Preparation method of photoinitiator 2-hydroxy-3-(4-benzoyl phenoxyl) propanesulfonic acid sodium

A technology of benzoylphenoxy and sodium propanesulfonate, which is applied in the preparation of sulfonate, organic chemistry, etc., can solve the problems of long reaction time, high product cost, difficult synthesis, etc., and achieve short reaction time and low production cost. Low, high yield effect

Inactive Publication Date: 2015-05-27
青岛欧美亚橡胶工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its synthetic method has been reported, but one of the raw materials, glycidyl trimethylamine chloride, is relatively difficult to synthesize, and the reaction time is long, and the yield is low, which makes the product cost higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0015] 1. Add sodium bisulfite, sodium sulfite and deionized water into a three-necked flask, add epichlorohydrin dropwise, control the temperature at 25°C, react for 1 hour, settle, filter, wash with water, and dry to obtain white crystals;

[0016] 2. Add powdered anhydrous potassium carbonate, 4-hydroxybenzophenone, the above-mentioned white crystals and N,N-dimethylformamide in sequence in a three-necked flask, stir and heat to 120°C, react for 4 hours, cool, and pour In acetone, a solid precipitated, filtered, washed, dried, recrystallized with a mixed solvent of ethanol and water, and dried in vacuum to obtain white crystals of 2-hydroxy-3-(4-benzoylphenoxy)propanesulfonate sodium .

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PUM

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Abstract

The invention discloses a preparation method of a photoinitiator 2-hydroxy-3-(4-benzoyl phenoxyl) propanesulfonic acid sodium. The method comprises the following steps: 1, adding sodium hydrogen sulfite, sodium sulfite and deionized water in a three-neck flask, dropwise adding epichlorohydrin, controlling the temperature at 25 DEG, reacting 1 h, settling, filtering, washing and drying to obtain white crystal; 2, adding powdered anhydrous potassium carbonate, 4-hydroxy benzophenone, the white crystal and N,N-dimethyl formamide in the three-neck flask, stirring and heating to 120 DEG C, reacting for 4 h, cooling, pouring the mixture into acetone, precipitating solids, filtering, washing, drying, recrystallizing by a mixed solvent of ethanol and water, and conducting vacuum drying to obtain the white crystal of 2-hydroxy-3-(4-benzoyl phenoxyl) propanesulfonic acid sodium. The preparation method provided by the invention has the advantages of easily available raw materials, short reaction time, high yield and low production cost.

Description

[0001] technical field [0002] The invention relates to a preparation method of a photoinitiator, in particular to a preparation method of sodium 2-hydroxy-3-(4-benzoylphenoxy)propanesulfonate. [0003] Background technique [0004] Water-based benzophenone-based photoinitiators have the advantages of high photoinitiation efficiency, colorless and odorless, and are highly water-soluble in a wide range of pH values. They occupy a very important position in water-based photoinitiators, mainly The introduction of ionic groups on the parent core of benzophenone not only maintains the photoinitiation performance of the parent, but also enhances the water solubility. Its synthetic method has been reported, but one of the raw materials, glycidyl trimethylamine chloride, is difficult to synthesize, and the reaction time is long and the yield is low, which makes the product cost higher. [0005] Contents of the invention [0006] The object of the present invention is to provid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/11C07C303/32
Inventor 张国盛
Owner 青岛欧美亚橡胶工业有限公司