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Preparation method of silicon modified waterborne epoxy resin

A water-based epoxy resin, epoxy resin technology, applied in the coating and other directions, can solve the problems of water-based epoxy resin drying, poor weather resistance, environmental protection people's health threats, easy to produce precipitation and other problems, to achieve excellent acid and alkali resistance high hardness and good stability

Inactive Publication Date: 2016-01-13
佛山市高明同德化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the traditional epoxy resins are insoluble in water, so they need to be diluted with a large amount of organic solvents during construction. The volatilization of organic solvents will pose a serious threat to environmental protection and people's health. Therefore, water-based epoxy resins are more and more popular among people. I like it, but the dryness and poor weather resistance of water-based epoxy resin limit its application
Most of the silicon-modified epoxy resin coatings prepared by researchers at home and abroad adopt the method of physical mixing. Although the method is simple and easy to implement, it has poor stability and is prone to precipitation.

Method used

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  • Preparation method of silicon modified waterborne epoxy resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 60 parts of methyltriethoxysilane, 64 parts of absolute ethanol, 20 parts of distilled water and 20 parts of 3-triethoxysilyl-1-propylamine, mix and adjust to an acidic system, at 50~75℃ Under reaction for 8h, the modified silica sol is obtained.

[0022] Esterify 70 parts of epoxy resin E-06 (epoxy equivalent 800-3000), 50 parts of linoleic acid and 1 part of zinc oxide at 220°C, add ethylene glycol butyl ether to dilute after esterification, and cool down Slowly add a mixed solution of 12 parts of n-butyl acrylate, 14 parts of styrene, 8 parts of acrylic acid and 20 parts of silica sol (synthesized in this experiment, with a solid content of 20%), and react under the action of the catalyst benzoyl peroxide, After the reaction is completed, the silicon-modified water-based epoxy resin can be obtained.

Embodiment 2

[0024] Weigh 60 parts of methyltriethoxysilane, 64 parts of absolute ethanol, 20 parts of distilled water and 20 parts of 3-triethoxysilyl-1-propylamine, mix and adjust to an acidic system, at 50~75℃ Under reaction for 8h, the modified silica sol is obtained.

[0025] Esterify 70 parts of epoxy resin E-06 (epoxy equivalent 800-3000), 50 parts of linoleic acid and 1 part of zinc oxide at 220°C, add ethylene glycol butyl ether to dilute after esterification, and cool down Slowly add a mixed solution of 12 parts of n-butyl acrylate, 14 parts of styrene, 8 parts of acrylic acid and 30 parts of silica sol (synthesized in this experiment, with a solid content of 20%), and react under the action of the catalyst benzoyl peroxide, After the reaction is completed, the silicon-modified water-based epoxy resin can be obtained.

Embodiment 3

[0027] Weigh 60 parts of methyltriethoxysilane, 54 parts of absolute ethanol, 22 parts of distilled water and 22 parts of 3-triethoxysilyl-1-propylamine, mix and adjust to an acidic system, at 50~75℃ Under reaction for 8h, the modified silica sol is obtained.

[0028] Esterify 70 parts of epoxy resin E-06 (epoxy equivalent 800-3000), 30 parts of linoleic acid and 1 part of zinc oxide at 220°C. After the esterification is completed, add ethylene glycol butyl ether for dilution. Slowly add a mixed solution of 18 parts of n-butyl acrylate, 21 parts of styrene, 12 parts of acrylic acid and 20 parts of silica sol (synthesized in this experiment, with a solid content of 20%), and react under the action of the catalyst benzoyl peroxide, After the reaction is completed, the silicon-modified water-based epoxy resin can be obtained.

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Abstract

The invention relates to a preparation method of silicon modified waterborne epoxy resin. The preparation method comprises the following steps: (1) modifying organosilicon with a silane coupling agent to prepare silica sol; and (2) carrying a reaction between silica sol and waterborne epoxy resin under the action of a catalyst, and adding a neutralizer to prepare silicon modified waterborne epoxy resin. By combining silica sol and water-borne epoxy resin by a chemical bond, the silicon modified waterborne epoxy resin with excellent performance is obtained. The silicon modified waterborne epoxy resin is a novel resin coating having excellent properties of both an organic polymer and an inorganic material. The silicon modified waterborne epoxy resin is a combination of an organic polymer and an inorganic phase at the nanoscale, producing a strong interfacial interaction between the organic polymer and the inorganic phase. The prepared silicon modified waterborne epoxy resin has superior organic and inorganic properties, has characteristics of high strength, high toughness, good adhesive force, good high temperature resistance, good ageing resistance and the like, and overcomes performance defects of traditional waterborne epoxy resin.

Description

technical field [0001] The invention relates to the field of water-based paints, in particular to a method for preparing a silicon-modified water-based epoxy resin with good dryness and weather resistance. Background technique [0002] Epoxy resin has excellent characteristics such as good adhesion, strong adhesion, and outstanding chemical resistance, and is widely used in the field of coatings. Most of the traditional epoxy resins are insoluble in water, so they need to be diluted with a large amount of organic solvents during construction. The volatilization of organic solvents will pose a serious threat to environmental protection and people's health. Therefore, water-based epoxy resins are more and more popular among people. I like it, but the dryness and poor weather resistance of water-based epoxy resin limit its application. Most of the silicon-modified epoxy resin coatings prepared by researchers at home and abroad adopt the method of physical mixing. Although the ...

Claims

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Application Information

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IPC IPC(8): C08G81/02C08F283/10C09D187/00
Inventor 陈鹏张洪刚彭永标
Owner 佛山市高明同德化工有限公司
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