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Water-based alkyd resin and preparation method thereof

A technology of water-based alkyd resin and acid anhydride, applied in the field of coatings, can solve the problems of air pollution, resource and energy waste, etc., and achieve the effects of improving paint film adhesion, reducing gel phenomenon, and improving economic use value

Active Publication Date: 2020-11-27
TANGSHAN XUYANG CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional solvent-based alkyd resins contain a large amount of organic solvents, which pollute the air and waste resources and energy

Method used

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  • Water-based alkyd resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 29 parts by weight of the reaction raw materials linoleic acid, 12 parts by weight of pentaerythritol, 0.6 parts by weight of glycerol monomethyl ether, 16 parts by weight of isophthalic acid, and 2.11 parts by weight of xylene are added to the reaction with a water separator and a reflux condenser. In the flask, under the protection of nitrogen, stir and be heated to 160~240 ℃ to carry out esterification reaction 1~5 hour, until the acid value of reaction solution drops to 7~15mgKOH / g; Add the trimellitic anhydride of 4 parts by weight again (trimellitic anhydride is Increase the water-soluble functional monomer) and 2.11 parts by weight of xylene, and continue to react at a temperature of 170°C to 190°C until the acid value of the solution drops to 25 to 35mgKOH / g;

[0031] Distill the xylene under reduced pressure at a temperature of 150°C, add a neutralizing agent, control the pH of the reaction solution to 7-8, then add 20 parts by weight of co-solvent dimethyl glyc...

Embodiment 2

[0033] 31.2 parts by weight of the reaction raw materials linoleic acid, 18.55 parts by weight of pentaerythritol, 1.2 parts by weight of glycerol monomethyl ether, 18.42 parts by weight of isophthalic acid, and 3 parts by weight of xylene are added to the reaction with water separator and reflux condenser. In the flask, under the protection of nitrogen, stir and heat to 160-240°C for esterification reaction for 1-5 hours, until the acid value of the reaction solution drops to 7-15 mgKOH / g; then add 5.86 parts by weight of trimellitic anhydride and 3 parts by weight xylene, continue to react at a temperature of 170°C to 190°C until the acid value of the solution drops to 25 to 35mgKOH / g;

[0034] Distill the xylene under reduced pressure at a temperature of 150°C, add a neutralizing agent, control the pH of the reaction solution to 7-8, then add 30 parts by weight of co-solvent dimethyl glycerol, add water to the material and disperse it evenly at a high speed , to obtain wate...

Embodiment 3

[0036] 33 parts by weight of the reaction raw materials linoleic acid, 22 parts by weight of pentaerythritol, 1.8 parts by weight of glycerol monomethyl ether, 22 parts by weight of isophthalic acid, and 4 parts by weight of xylene are added to the reaction with water separator and reflux condenser. In the flask, under the protection of nitrogen, stir and heat to 160-240°C for esterification reaction for 1-5 hours, until the acid value of the reaction solution drops to 7-15 mgKOH / g; then add 8 parts by weight of trimellitic anhydride and 4 parts by weight xylene, continue to react at a temperature of 170°C to 190°C until the acid value of the solution drops to 25 to 35mgKOH / g;

[0037] Distill the xylene under reduced pressure at a temperature of 150°C, add a neutralizing agent, control the pH of the reaction solution to 7-8, then add 40 parts by weight of co-solvent dimethyl ether, and add water to the material and disperse it evenly at a high speed , to obtain water-based al...

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Abstract

The invention provides water-based alkyd resin and a preparation method thereof. The water-based alkyd resin is prepared by taking vegetable oleic acid, polyhydric alcohols except glyceryl monomethylether, glyceryl monomethyl ether and polybasic acid or anhydride as reaction raw materials and taking a water-carrying agent as a reflux solvent through multi-step reactions. The water-based alkyd resin has improved water resistance and adhesive force, and the method realizes the reuse of glycerol and improves the utilization value of glycerol.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a preparation method of water-based alkyd resin. Background technique [0002] Alkyd resin coatings have the characteristics of good film adhesion, brightness, fullness, etc., and have good construction properties, and are widely used in bridges, machinery, vehicles, ships, aircraft, and instruments. Traditional solvent-based alkyd resins contain a large amount of organic solvents, which pollute the air and waste resources and energy. Therefore, the water-based alkyd resin is the development direction of alkyd resin, and it also meets the requirements of environmental protection. Water-based alkyd resin uses water as the dispersion medium, which can save more than 80% of the organic solvent in the solvent-based alkyd resin coating formula. The most effective environment-friendly resin that pollutes and saves resources. [0003] At present, a large amount of glycerin (account...

Claims

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Application Information

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IPC IPC(8): C08G63/668C08G63/78C09D167/06
CPCC08G63/668C08G63/78C09D167/06
Inventor 于洪锋徐海军田红姚俊儒王乐李金鹏高艺斌刘一斌
Owner TANGSHAN XUYANG CHEM IND CO LTD
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