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A kind of epoxy resin for matting powder coating and its preparation method and application

A matting powder coating and epoxy resin technology, applied in powder coatings, epoxy resin coatings, polyester coatings, etc., can solve the problems of matting powder coating matting effect and mechanical performance storage stability can not be satisfied at the same time, to improve storage Stability, gloss reduction, cost saving effects

Active Publication Date: 2021-07-16
ZHUHAI HONGCHANG ELECTRONICS MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to provide a preparation method of epoxy resin for matting powder coatings aiming at the problem that the matting effect, mechanical properties and storage stability of existing matting powder coatings cannot be satisfied at the same time

Method used

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  • A kind of epoxy resin for matting powder coating and its preparation method and application
  • A kind of epoxy resin for matting powder coating and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of epoxy resin for matting powder coating, comprising the following steps:

[0038] Step 1. Dissolution: Under the protection of nitrogen, mix 98g of epichlorohydrin and 200g of bisphenol A; heat up to 60°C to dissolve, and the dissolution time is 60min; add 180g of methyl isobutyl ketone, stir at a speed of 200r / min, and stir for 30min ;

[0039] Step 2, catalytic reaction: 310 g of sodium hydroxide solution with a concentration of 15% was added dropwise, the time of adding was 180 min, and the stirring speed was 200 r / min;

[0040] Step 3, separation and purification: including the following stages:

[0041] Separation section: Add 200g of methyl isobutyl ketone and 100g of water, stir at 85°C for 30min at a stirring speed of 100r / min, remove the lower aqueous solution after stirring;

[0042] Neutralization section: add 60g of water and 70g of neutralizing agent with a concentration of 15%, stir at 85°C for 30min at a stirring speed of 100r / min...

Embodiment 2

[0046] A preparation method of epoxy resin for matting powder coating, comprising the following steps:

[0047] Step 1. Dissolving: under the protection of nitrogen, mix 106g of epichlorohydrin and 200g of bisphenol A; heat up to 60°C to dissolve, and the dissolution time is 60min; add 160g of xylene, stir at a speed of 300r / min, and stir for 30min;

[0048] Step 2, catalytic reaction: adding 305g of sodium hydroxide solution with a concentration of 15% dropwise for 180min, and the stirring speed is 300r / min;

[0049] Step 3, separation and purification: including the following stages:

[0050] Liquid separation section: Add 200g of xylene and 100g of water, stir at 85°C for 30min, the stirring speed is 120r / min, after the stirring is completed, remove the lower aqueous solution;

[0051] Neutralization section: add 60g of water and 70g of neutralizing agent with a concentration of 15%, stir at 85°C for 30min at a stirring speed of 120r / min, and remove the lower aqueous solut...

Embodiment 3

[0055] A preparation method of epoxy resin for matting powder coating, comprising the following steps:

[0056] Step 1. Dissolving: under the protection of nitrogen, mix 103g of epichlorohydrin and 200g of bisphenol A; heat up to 55°C to dissolve, and the dissolution time is 60min; add 160g of toluene, stir at a speed of 250r / min, and stir for 30min;

[0057] Step 2, catalytic reaction: dripping concentration is 225g of potassium hydroxide solution of 20%, dripping time is 240min, and stirring speed is 250r / min;

[0058] Step 3, separation and purification: including the following stages:

[0059] Separation section: Add 200g of toluene and 100g of water, stir at 90°C for 30min at a stirring speed of 100r / min, remove the lower aqueous solution after stirring;

[0060] Neutralization section: add 60g of water and 70g of neutralizing agent with a concentration of 15%, stir at 80°C for 30min, and the stirring speed is 100r / min, and remove the lower aqueous solution;

[0061] Wa...

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Abstract

The invention provides an epoxy resin for matte powder coating, a preparation method and application thereof, and relates to the field of polymer coatings. The preparation method includes the following steps: dissolving: dissolving epichlorohydrin and bisphenol A under the protection of an inert gas at a temperature, then adding a solvent and mixing evenly; catalytic reaction: adding a catalyst to the above mixed solution; separation and purification: including the following stages Separation section, neutralization section, water washing section and desolvation section. The epoxy resin of the present invention has the characteristics of high epoxy equivalent, low viscosity, low softening point, high content of α-diol group, wide range of hydrolyzed chlorine, and low content of low molecular weight n=0 structure, which can ensure the smoothness of the matte powder coating at the same time. Low gloss, good mechanical properties, good storage stability and so on.

Description

technical field [0001] The invention relates to the field of polymer coatings, in particular to an epoxy resin for matting powder coatings and a preparation method and application thereof. Background technique [0002] With the promotion of national environmental protection and related policies, the demand for powder coatings as an environmentally friendly coating is increasing. In recent years, the market sales of thermosetting powder coatings in my country have increased from 1.29 million tons in 2015 to 1.61 million tons in 2017. [0003] With the change of consumer demand in the market, consumers began to choose products with soft light and non-irritating low-gloss appearance. The application fields of matting powder coatings are becoming wider and wider, and there are more and more types. The existing extinction methods are generally physical extinction and chemical extinction. The chemical extinction method has lower gloss and better stability. [0004] The chemical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/06C09D5/03C09D163/00C09D167/00
Inventor 王岳寅陆昆林仁宗
Owner ZHUHAI HONGCHANG ELECTRONICS MATERIAL
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