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Method for preparing self-emulsification aqueous epoxy resin emulsion

A water-based epoxy resin and epoxy resin technology, applied in the field of preparation of self-emulsifying water-based epoxy resin emulsion, can solve the problems of high corrosion, complicated preparation process, large particle size, etc., and achieve improved flexibility and storage stability Good, small particle size effect

Active Publication Date: 2008-05-14
上海华谊涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to be able to more effectively replace the usual solvent-based epoxy resin coatings, people are making continuous progress in the development and research of water-based epoxy resins in the field of coatings. At present, the most common water-based epoxy resins are obtained by external emulsification. That is, in the presence of an emulsifier, the resin is dispersed in the water phase by external force, but this method has its own inherent limitations: the production equipment requires high requirements (high-speed dispersion equipment is required), and the particle size is large, storage stability and Application performance is not ideal
The shortcoming of this invention is that preparation process is complicated likewise, need to use concentrated HNO 3 oxidized, highly corrosive

Method used

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  • Method for preparing self-emulsification aqueous epoxy resin emulsion
  • Method for preparing self-emulsification aqueous epoxy resin emulsion
  • Method for preparing self-emulsification aqueous epoxy resin emulsion

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) After drying the liquid epoxy resin E-5095g and bisphenol A 11.4g, heat it to 90°C, stir evenly, then add polypropylene glycol glycidyl ether DY3601 (produced by Vantico) 7g and triphenylphosphine 0.17g, Slowly heat up to 150°C, and after the obvious heating around 160°C ends, take 1 hour to raise the temperature to 190°C. Then slowly cool to 150°C, add 12.8 g of propylene glycol methyl ether acetate, reflux for 1 hour, stop the reaction, and set aside.

[0033] (2) Add 230 g of liquid polyethylene glycol monomethyl ether into a four-necked reaction flask, add 0.2 g of dibutyltin dilaurate as a catalyst, and add 100 g of HDI dropwise, and the reaction does not exceed 70°C. After reacting for 3 hours, stop the reaction and keep it for use.

[0034] (3) 133.4 g of the reaction product of the above (1) is added in a four-necked reaction flask, 0.15 g of the catalyst dibutyltin dilaurate is added, and 35.9 g of the reaction product of the above (2) is added dropwise in...

Embodiment 2

[0037] (1) After drying 600g of liquid epoxy resin E-44 and 61.5g of bisphenol A, heat it to 90°C, stir evenly, then add 37.8g of polypropylene glycol glycidyl ether DY3601 (produced by Vantico) and 1.5 g of triphenylphosphine g. Slowly heat up to 150°C. After the obvious heating phenomenon around 160°C ends, raise the temperature to 190°C in 1 hour. Then slowly cool to 150° C., add 123.7 g of propylene glycol methyl ether acetate, reflux for 1 hour, stop the reaction, and set aside.

[0038] (2) Add 500 g of liquid polyethylene glycol monoglycidyl ether into a four-necked reaction flask, add 0.36 g of catalyst dibutyltin dilaurate, add 134.4 g dropwise, and the reaction does not exceed 70°C. After reacting for 3 hours, stop the reaction and keep it for use.

[0039] (3) 321.6 g of the reaction product of (1) is added in a four-necked reaction flask, 0.3 g of the catalyst dibutyltin dilaurate is added, 110 g of the reaction product of (2) is added dropwise in the reaction fla...

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Abstract

The invention relates to a method for preparing self-emulsifying aqueous epoxy resin emulsion, which is characterized in that the emulsion is made through the following two steps: (1) introducing hydrophilic groups to both ends of the main chain and the side chain through chain extending and grafting reaction to form aqueous epoxy resin; (2) Adding water to the produced aqueous epoxy resin and aqueous epoxy resin emulsion is obtained through self-emulsifying reaction. The self-emulsifying aqueous epoxy resin emulsion has excellent water dispersibility and processability. After film-forming by the firming agent, the self-emulsifying aqueous epoxy resin emulsion has excellent decoration effect and certain flexibility.

Description

technical field [0001] The invention relates to a preparation method of a polymer water emulsion, in particular to a preparation method of a self-emulsifying water-based epoxy resin emulsion, and the emulsion can be used as a basic raw material for preparing water-based paint. Background technique [0002] In recent years, with the development of science and technology and the continuous improvement of people's living standards, the requirements for environmental protection are getting higher and higher, and the relevant laws and regulations are becoming stricter. Correspondingly, the coating system is developing in the direction of high performance and low pollution. Environmentally friendly water-based coatings will gradually replace traditional solvent-based coatings in the next few years. Because of its excellent physical and mechanical properties, epoxy resin has been widely used in various sectors of the national economy involving military and civilian use, especially ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/14
Inventor 孙凌姚唯亮
Owner 上海华谊涂料有限公司
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