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Method for preparing powder coating

A technology of powder coatings and products, applied in powder coatings, anti-corrosion coatings, coatings, etc., can solve the problems of poor peelability, single protective performance, low coating film strength, etc., to prevent pollution, improve appearance, and high coating film strength Effect

Inactive Publication Date: 2017-06-27
宋容
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing protective coatings still have the disadvantages of low film strength, poor peelability and single protective performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of powder coating comprises the following steps:

[0028] 1) Add isophorone diisocyanate, polypropylene glycol, polyethylene glycol, dibutyltin dilaurate and butanone to the first reaction kettle at room temperature, and then raise the temperature to 58~80°C to make them Mix and react in the reactor until the value of -NCO% in the system does not change, and obtain the primary product for subsequent use;

[0029] 2) Control the temperature at 80°C, add dimethylol propionic acid to the primary product obtained in step 1) and react for 220~260min, then lower the temperature to 38~43°C, add triethylamine to obtain the secondary product ; Add secondary products to the second reaction kettle filled with distilled water and disperse the secondary products in distilled water, then add diethylenetriamine aqueous solution to obtain aliphatic powder emulsion;

[0030] 3) Add propyltrimethoxysilane to the flask filled with ethanol, stir and mix at a speed o...

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PUM

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Abstract

The invention discloses a method for preparing a powder coating. The method comprises the following steps: 1) adding isophorone diisocyanate and the like into a first reactor at room temperature so as to obtain a primary product; 2) adding dimethylolpropionic acid into the primary product, and adding triethylamine so as to prepare aliphatic powder emulsion; 3) preparing modified silica sol; 4) adding the aliphatic powder emulsion and the modified silica sol into a third reactor at room temperature so as to obtain mixed emulsion; 5) adding a proper amount of acrylic copolymer potassium salt and the like into a fourth reactor filled with distilled water so as to obtain a mixed base solution; and 6) adding the mixed emulsion into the mixed base solution, thereby obtaining the powder coating. According to the coating prepared by the invention, a protected object can be subjected to effective enclosed protection, and is prevented from being polluted, corroded and damaged. Meanwhile, the coating has the advantages of strippable property, high coating strength, high cohesion and high stability.

Description

technical field [0001] The invention relates to the field of packaging and decoration, in particular to a preparation method of powder coating. Background technique [0002] In order to prevent the materials or semi-products exposed to the atmosphere from being polluted, corroded and damaged, and prolong their service life, they are usually coated with good protective and peelable coatings on their surfaces for effective and temporary maintenance. Archive protection. In this way, it can not only isolate the invasion of air, salt spray, and microorganisms from the outside to achieve anti-corrosion effect; but also achieve the effect of cleaning and decontamination by adsorbing pollutants. Compared with solvent-based protective coatings, protective coatings are safer and more environmentally friendly, so they are widely used in the field of product packaging and decoration. However, the existing protective coatings still have the disadvantages of low film strength, poor peel...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D7/12C09D7/14C09D5/03C09D5/08C09D7/06C08G18/75C08G18/66C08G18/48C08G18/34C08G18/32C08G18/12C09D7/47C09D7/80
CPCC08G18/0823C08G18/12C08G18/4808C08G18/6685C08G18/6692C08G18/755C08K2201/011C08L2205/035C09D5/03C09D5/033C09D5/08C09D7/47C09D7/61C09D7/62C09D7/63C09D7/65C09D7/80C09D175/08C08L33/02C08L83/04C08K13/06C08K9/06C08K2003/2241C08K3/34C08K5/42C08K3/36C08G18/348C08G18/3228
Inventor 宋容
Owner 宋容
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