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Water-based free radical photo-initiation and preparation method thereof

A technology of photoinitiator and free radical, which is applied in the direction of coating, etc., can solve the problems of photoinitiator pollution, poor miscibility with water, complicated preparation methods, etc., and achieve the effects of easy procurement, increased solubility, and improved reaction conditions

Inactive Publication Date: 2008-08-06
范俊
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a water-based free radical photoinitiator and its preparation method, to solve the technical problems of serious pollution of existing photoinitiators, poor miscibility with water, and complex preparation methods; also solve the problem of reducing product cost and realizing industrialized production The problem

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  • Water-based free radical photo-initiation and preparation method thereof
  • Water-based free radical photo-initiation and preparation method thereof

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Embodiment

[0029] Embodiment: the compound of aqueous radical photoinitiator is 2-hydroxyl-(2'-thioxanthone oxy)-sodium propylsulfonate, prepares 2-hydroxyl-(2'-thioxanthone oxy) -The required raw material and mass ratio embodiment of sodium propylsulfonate:

[0030] o-mercaptobenzoic acid: 0.1mol;

[0031] Phenol: 0.15~0.2mol;

[0032] Concentrated sulfuric acid: 10.0mol;

[0033] Sodium salt of halosulfonic acid: 0.12mol;

[0034] THF: 0.6mol;

[0035] Anhydrous methanol: 0.6mol.

[0036] The embodiment of preparation method of the present invention sees figure 1 Shown:

[0037] Step 1: Slowly add 60 mL of concentrated sulfuric acid to 0.1 mol of o-mercaptobenzoic acid, and stir the mixture fully at 25-30° C. for 5-7 minutes.

[0038] Step 2: Divide 0.15-0.2 mol of phenol into three equal parts, and add each equal part to the above mixture under stirring at room temperature at intervals of 15-20 minutes, stir and react, and react at room temperature for 35-40 minutes after addit...

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Abstract

The invention relates to an aqueous free radical photo initiator and a corresponding preparation method, wherein the initiator is 2-hydroxy-(2'-thioxanthone oxyl)-propyl sulfonate. The preparation method comprises adding concentrated sulfuric acid into o-sulfhydrylbenzoic acid solution to be reacted, mixing, adding fenol to extract, mixing, increasing temperature to 75-80 DEG C when the reaction solution is orange-red turbid solution, reducing temperature T under 45 DEG C after complete reaction, washing and filtering the reaction solution, drying to obtain 2-hydroxy thioxanthone dry product, adding 2-hydroxy thioxanthone dry product and sodium-hydroxide into tetrahydrofuran solution, increasing temperature to refluxing state, mixing and reacting to obtain red suspending liquid, adding halogenated sulfonate into the red suspension liquid, adding phase transfer catalyst, refluxing, mixing and reacting completely, quenching the reaction liquid into solvent, drying and filtering to obtain final product. The preparation method can avoid environment pollution, improve water solubility and reduce product cost with simple preparation.

Description

(1) Technical field [0001] The invention relates to a photoinitiator, especially a water-soluble photoinitiator. (2) Background technology [0002] Photoinitiator is a key component of photocurable materials and plays a decisive role in the photocuring speed of materials. Traditional photoinitiators are oil-soluble, and their volatile organic solvents have large VOC emissions, which have the disadvantage of polluting the environment. In order to solve this problem, the development of water-based photoinitiators is attracting great attention. The solubility of existing water-based photoinitiators in water needs to be improved, and the absorption wavelength needs to be increased. However, it does not meet the development needs of photosensitive coatings. There is an urgent need to develop an environmentally friendly, low-VOC emission water-based photoinitiator. (3) Contents of the invention [0003] The purpose of the present invention is to provide a water-based free rad...

Claims

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Application Information

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IPC IPC(8): C07D335/16C08F2/50C09D7/00
Inventor 潘想春杜树荣范忠
Owner 范俊
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