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Low temperature curing powder coating and preparation method thereof

A powder coating, curing technology, applied in powder coatings, polyester coatings, epoxy resin coatings, etc., can solve the problems of long baking time, high baking temperature, energy waste, etc., and achieve the effect of excellent mechanical properties

Active Publication Date: 2013-10-02
JIANGSU HUAGUANG POWDER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The curing conditions of ordinary powder coatings are mostly high baking temperature and long baking time. This kind of method is easy to cause waste of energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A low-temperature curing powder coating, characterized in that: the weight percentage of the powder coating components and content is as follows: epoxy resin: 30%; low-temperature curing polyester resin: 30%; high-activity low-temperature curing accelerator: 0.4% ; Benzoin: 0.4%; Imported leveling agent: 1%; Hydrogenated castor oil: 0.5%; Pigment: 5%; Precipitated barium sulfate: 32.7%.

[0013] The preparation method of described low-temperature curing type powder coating, the method comprises the steps:

[0014] a. Epoxy resin; low-temperature curing polyester resin; high-activity low-temperature curing accelerator; benzoin; imported leveling agent; hydrogenated castor oil; pigment; precipitated barium sulfate; prepared in proportion and put into high-speed mixing Fully and evenly mix in the container for 10-12min;

[0015] b. Take the homogeneously mixed material in step a and put it into a screw extruder to fully melt and knead, then extrude, tablet, and pulverize ...

Embodiment 2

[0017] A low-temperature curing powder coating, characterized in that: the weight percentage of the components and content of the powder coating is as follows: epoxy resin: 29%; low-temperature curing polyester resin: 28.5%; high-activity low-temperature curing accelerator: 0.6% ; Benzoin: 0.4%; Imported leveling agent: 1%; Hydrogenated castor oil: 0.5%; Pigment: 5%;

Embodiment 3

[0019] A low-temperature curing powder coating, characterized in that: the weight percentage of the components and content of the powder coating is as follows: epoxy resin: 30%; low-temperature curing polyester resin: 30%; high-activity low-temperature curing accelerator: 1% ; Benzoin: 0.4%; Imported leveling agent: 1%; Hydrogenated castor oil: 0.5%; Pigment: 5%; Precipitated barium sulfate: 32.1%.

[0020] The epoxy powder product obtained in each embodiment is sprayed on the metal workpiece, and the curing condition is 130°C / 20min. The test results are as follows:

[0021] After testing: the D50 particle size of the powder coating is 38-42μm; the impact resistance of the cured coating film (GB / T1732-1993): 50cm forward and recoil pass; heat resistance: 150°C, 35h baking without loss of gloss Color change; salt spray test 500h (GB / T1771-1991): no blistering, no cracking and no peeling; adhesion (1mm cross-cut method, GB / T9286-1998): 0 grade; pencil hardness (GB / T6739 -1996):...

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Abstract

The invention relates to a low temperature curing powder coating and a preparation method thereof. The powder coating comprises the following components by weight percent: 28-30% of epoxy resin, 28-30% of low temperature curing polyester resin, 0.1-1% of low temperature curing catalyst, 0.1-0.4% of benzoin, 0.7-1.4% of imported flatting agent, 0.4-1% of hydrogenated castor oil, 5-10% of pigment, and 25-40% of precipitated barium sulphate. In the formula of the powder coating, the low temperature curing polyester resin and the low temperature curing catalyst are adopted, the film of the power coating product can be cured at lower curing temperature, and each mechanical property of the film can be guaranteed to be excellent, therefore, the powder coating is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of powder coating preparation, in particular to a low-temperature curing powder coating and a preparation method thereof. Background technique [0002] Powder coating is widely used in the surface coating of various metal parts due to its superior performance of environmental protection and economy. With the development of economy and society, people's concept of environmental protection is getting deeper and deeper, and the application range of powder coatings is also increasing. People's requirements for curing conditions of powder coatings are also getting higher and higher. The curing conditions of ordinary powder coatings are mostly high baking temperature and long baking time. This kind of method is easy to cause waste of energy. Therefore, from the perspective of saving energy and reducing costs, low-temperature curing powder coatings have broad market prospects. Contents of the invention [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/04C09D167/00C09D7/12C09D5/03
Inventor 潘建良
Owner JIANGSU HUAGUANG POWDER
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