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Reducing agent monomer for preparing styrene-acrylic emulsion through oxidation reduction at normal temperature and synthesis method thereof

A technology of styrene-acrylic emulsion and synthesis method, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of amino hydroxyl compounds, etc., can solve problems such as poor water resistance of paint films, and achieve low price, high molecular weight, and synthetic raw materials cheap and easy results

Active Publication Date: 2020-07-14
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the stability of the emulsion, a large amount of emulsifier is often added, which will lead to the deterioration of the water resistance of the paint film formed by the emulsion

Method used

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  • Reducing agent monomer for preparing styrene-acrylic emulsion through oxidation reduction at normal temperature and synthesis method thereof
  • Reducing agent monomer for preparing styrene-acrylic emulsion through oxidation reduction at normal temperature and synthesis method thereof
  • Reducing agent monomer for preparing styrene-acrylic emulsion through oxidation reduction at normal temperature and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Reductant Monomer Synthesis

[0034] Add maleic anhydride (4.9 g, 0.05 mol) into a three-necked flask equipped with a thermometer. Add 30ml of chloroform, stir to dissolve at room temperature, after the maleic anhydride is completely dissolved, then dissolve dimethylethanolamine (4.5g, 0.05mol) into 10ml of chloroform, and add it to the reaction flask all at once. After reacting at room temperature for 5 hours, a white suspension was obtained, and the reaction was terminated. Add 40ml of ether, shake well, centrifuge and take the next layer of white solid. It was washed with 40 ml of diethyl ether, filtered twice with suction, and dried in vacuo to constant weight to obtain a white powder. The total yield is 94.5%. For product NMR, please refer to the accompanying drawings figure 1 .

Embodiment 2

[0036] Reductant Monomer Synthesis

[0037] Add maleic anhydride (4.9 g, 0.05 mol) into a three-necked flask equipped with a thermometer. Add 30ml of chloroform, stir and dissolve at room temperature, after the maleic anhydride is completely dissolved, then dissolve dimethylethanolamine (2.3g, 0.025mol) into 8ml of chloroform, and add it to the reaction flask all at once. After reacting at room temperature for 4 hours, a white suspension was obtained, and the reaction was terminated. Add 40ml of ether, shake well, centrifuge and take the next layer of white solid. It was washed with 40 ml of diethyl ether, filtered twice with suction, and dried in vacuo to constant weight to obtain a white powder. The total yield is 65.7%.

Embodiment 3

[0039] Reductant Monomer Synthesis

[0040] Add maleic anhydride (4.9 g, 0.05 mol) into a three-necked flask equipped with a thermometer. Add 30ml of chloroform, stir to dissolve at room temperature, after the maleic anhydride is completely dissolved, then dissolve dimethylethanolamine (9.0g, 0.10mol) into 20ml of chloroform, and add it to the reaction flask all at once. After reacting at room temperature for 8 hours, a white suspension was obtained, and the reaction was terminated. Add 40ml of ether, shake well, centrifuge and take the next layer of white solid. It was washed with 40 ml of diethyl ether, filtered twice with suction, and dried in vacuo to constant weight to obtain a white powder. The total yield is 57.7%.

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Abstract

The invention belongs to the field of polymer synthesis, and particularly discloses a reducing agent monomer for preparing styrene-acrylic emulsion through oxidation reduction at normal temperature and a synthesis method thereof. Maleic anhydride and dimethylethanolamine are used as raw materials to synthesize the reducing agent monomer 4-(2-(dimethylamino)ethoxy)-4-oxetyl-2-olefine acid, the synthesis raw materials are cheap and easy to obtain, the synthesis conditions are simple, and purification is easy. A synthesized reducing agent monomer is used as a reducing agent; potassium persulfateis taken as and oxidant, water is taken as a dispersion medium, the styrene-acrylic emulsion is synthesized at room temperature through free radical microemulsion polymerization by taking sodium dodecyl sulfate as an emulsifier and styrene, butyl acrylate and methyl methacrylate as comonomers, a reaction system is simple and stable, reaction conditions are mild, temperature control is not needed,the influence on the environment is relatively small, the energy consumption is low, and the reducing agent monomer is suitable for industrial large-scale production. The monomer conversion rate of the synthesized styrene-acrylic emulsion is high, and the styrene-acrylic emulsion with high molecular weight and a branched structure can be obtained at normal temperature.

Description

technical field [0001] The invention belongs to the field of polymer synthesis, and in particular relates to a reducing agent monomer used for oxidizing and reducing styrene-acrylic emulsion at normal temperature and a synthesis method thereof. Background technique [0002] Styrene-acrylic emulsion is a copolymerized emulsion of styrene and acrylate monomers. The styrene-acrylic emulsion paint prepared with it as the main film-forming substance is non-toxic, has no environmental pollution, and has good weather resistance, color retention, and water resistance. , Alkali resistance, so it has been widely used in latex paint for interior and exterior walls and other water-based paints. Due to the special synthesis principle and film-forming mechanism of emulsion polymer, its water resistance, gloss and adhesion still have a certain gap compared with polymers obtained by other polymerization methods. [0003] The traditional styrene-acrylic emulsion is mainly composed of styren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C219/08C07C213/06C07C213/10C08F212/08C08F220/18C08F220/14C08F222/22
CPCC07C219/08C07C213/06C07C213/10C08F212/08C08F220/18C08F220/1804C08F220/14C08F222/22C08F2438/02
Inventor 孙邱杰王忠聿赵毅卓范怡黄文艳蒋必彪薛小强杨宏军江力蒋其民
Owner CHANGZHOU UNIV
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