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Fluorosilicon modified epoxy resin and preparation method thereof and powder coating

An epoxy resin, fluorosilicon modification technology, used in epoxy resin coatings, powder coatings, anti-corrosion coatings, etc., can solve problems such as the inability to obtain the ideal water contact angle value, the inability to achieve fouling resistance and self-cleaning, etc.

Active Publication Date: 2018-04-20
ANHUI SHANFU NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these improved methods in the prior art still cannot obtain the ideal water contact angle value, which is about 105°, and cannot achieve the ideal stain resistance and self-cleaning effect

Method used

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  • Fluorosilicon modified epoxy resin and preparation method thereof and powder coating
  • Fluorosilicon modified epoxy resin and preparation method thereof and powder coating
  • Fluorosilicon modified epoxy resin and preparation method thereof and powder coating

Examples

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preparation example Construction

[0033] The present invention provides a preparation method of fluorosilicon modified epoxy resin, which comprises the following steps:

[0034] (1) The fluorine-containing acrylate, γ-(methacryloxy)propyltrimethoxysilane, epoxy reactive diluent and initiator are mixed and then prepolymerized to obtain a fluorosilicone prepolymer;

[0035] (2) After mixing the fluorosilicone prepolymer, bisphenol A epoxy resin, bisphenol A and a phase transfer catalyst, perform a first-level polymerization reaction to obtain a first-level polymer;

[0036] (3) After mixing the primary polymer, bisphenol A and the phase transfer catalyst, a secondary polymerization reaction is performed to obtain a fluorosilicone modified epoxy resin.

[0037] In the preparation method of the present invention, all the raw materials used are commercially available products that are well known to those skilled in the art, and will not be repeated one by one below.

[0038] In the present invention, fluorine-containing acry...

Embodiment 1

[0078] In a 100mL four-necked flask equipped with mechanical stirring, thermometer, reflux condenser, nitrogen introduction and vacuum device, add 10g hexafluorobutyl methacrylate, 10g γ-(methacryloxy)propyltrimethoxysilane and 8g Propylene oxide benzyl ether, stir and mix uniformly, add 0.15g benzoyl peroxide to slowly raise the temperature of the oil bath to 100℃, react for 30min, it can be observed that the viscosity of the reaction system rises slightly, after the reaction is cooled, fluorine is obtained Silicon prepolymerized product.

[0079] Add 50g of liquid bisphenol A epoxy resin (E-54) and 5g of bisphenol A into a 250ml four-necked flask equipped with mechanical stirring, thermometer, reflux condenser and nitrogen introduction device. After heating to 50℃, stir for bisphenol A is completely dissolved, add 20g of the obtained fluorosilicone prepolymerized product, increase the temperature to 100℃ and keep it for 15min, add 0.2g benzyltrimethylammonium bromide, then incr...

Embodiment 2

[0085] Add 11.5g of hexafluorobutyl methacrylate and 8.5g of γ-(methacryloxy)propyltrimethoxysilane into a 100mL four-necked flask equipped with mechanical stirring, thermometer, reflux condenser, nitrogen introduction and vacuum device And 8g of propylene oxide benzyl ether, stir and mix well, add 0.15g of benzoyl peroxide to slowly raise the temperature of the oil bath to 100°C, and react for 30 minutes. A slight increase in the viscosity of the reaction system can be observed. Cool after the reaction. The fluorosilicone prepolymerized product is obtained.

[0086] Add 50g of liquid bisphenol A epoxy resin (E-54) and 5g of bisphenol A into a 250ml four-necked flask equipped with mechanical stirring, thermometer, reflux condenser and nitrogen introduction device. After heating to 50℃, stir for bisphenol A is completely dissolved, add 20g of the obtained fluorosilicone prepolymerized product, increase the temperature to 100℃ and keep it for 15min, add 0.2g benzyltrimethylammonium...

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Abstract

The invention provides a preparation method of fluorosilicon modified epoxy resin. The preparation method comprises the following steps: firstly, pre-polymerizing fluorine-containing acrylate and gamma-(methacryloxy)propyltrimethoxysilane, wherein the fluorine-silicon ratio and the branch chain length can be adjusted; dividing an epoxy resin synthesizing process into two steps, namely firstly grafting a fluorosilicon prepolymer, and then performing chain extension by using bisphenol A, so that a fluorosilicon structure can be uniformly distributed in a molecular structure of epoxy resin. The fluorosilicon modified epoxy resin provided by the invention comprises fluorosilicon polymer grafted side chains, and can significantly improve the surface properties of powder coating, so that the powder coating has the characteristics of hydrophobicity, oleophobicity and low surface energy. The invention further provides the powder coating. Experimental results of the embodiment show that the powder coating has the water contact angle being higher than 140 degrees, and can maintain unchanged for 30 days under corrosion of hydrochloric acid with the concentration of 10%, sodium hydroxide withthe concentration of 20% and sodium chloride with the concentration of 3.5%.

Description

Technical field [0001] The invention relates to the technical field of functional epoxy resins, in particular to a fluorosilicon modified epoxy resin, a preparation method thereof and a powder coating. Background technique [0002] Epoxy resin is an important type of thermosetting resin. It has excellent bonding properties, wear resistance, mechanical properties, electrical insulation properties, chemical stability, high and low temperature resistance, low shrinkage, easy processing and low cost, etc. advantage. Epoxy resins can be divided into liquid epoxy resins and solid epoxy resins at room temperature due to the difference in their molecular weights. The solid epoxy resins can be widely used in the field of powder coatings. [0003] With the continuous expansion of the application field of epoxy powder coatings, especially in dusty, haze, oil mist and crowded areas, powder coatings have not only played a decorative role, but also have higher and higher functional requirements...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/03C09D5/08C09D7/61C08F220/22C08F230/08C08G59/16
Inventor 任华包秀群叶琳
Owner ANHUI SHANFU NEW MATERIAL TECH
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