High-infrared rapid-curing powder paint for coil steel and preparation method thereof

A fast-curing, powder coating technology, used in powder coatings, polyester coatings, coatings, etc., can solve the problems of poor compatibility between polyester resin and fluorocarbon polyester, and achieve poor compatibility and easy operation. , the effect of improving production efficiency

Active Publication Date: 2016-01-27
GUANGZHOU KINTE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above-mentioned problems in the prior art, the present invention provides a high-infrared fast-curing powder coating for coil steel and its preparation method. By modifying the fluorocarbon resin with polyester resin, it not only improves the compatibility between polyester resin and fluorocarbon polyester In order to solve the problem of poor capacitance, the excellent properties of fluororesin are also fully utilized. Combined with advanced high-infrared curing technology, fluorocarbon-polyester powder coatings with fluorocarbon segments enriched on the surface have been successfully prepared, which greatly improves the coating quality. Excellent weather resistance, acid resistance, alkali resistance, oil resistance and other properties

Method used

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  • High-infrared rapid-curing powder paint for coil steel and preparation method thereof
  • High-infrared rapid-curing powder paint for coil steel and preparation method thereof
  • High-infrared rapid-curing powder paint for coil steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A high-infrared fast-curing powder coating for coil steel, its composition and weight ratio are:

[0042]

[0043]

[0044] Polyester polyester resin parameters (acid value 30-36mgKOH / g, viscosity 3500±500mPa·S)

[0045] Preparation:

[0046] (1) Take polyester resin curing agent, leveling agent, benzoin, filler, pigment by weight, place mixing tank, fully mix and crush, obtain mixed premixed material;

[0047](2) The mixed premixed material is sent to a twin-screw extruder for extrusion, and the extrusion temperature is controlled between 90-120°C;

[0048] (3) The extruded material is compressed by a tablet machine, cooled, crushed, and sieved to obtain a powder coating with a particle size of 30-40um.

[0049] Coating curing process:

[0050] (1) Use the above-mentioned powder coating as an electrostatic spraying model, and the coating thickness is 50mm±10mm.

[0051] (2) Adjust the heating gear of the high-infrared curing instrument to the highest gear, pr...

Embodiment 2

[0053] A high-infrared fast-curing powder coating for coil steel, its composition and weight ratio are:

[0054]

[0055]

[0056] Polyester polyester resin parameters (acid value 30-36mgKOH / g, viscosity 3500±500mPa·S)

[0057] Get above-mentioned each component and make powder coating according to the preparation method of Example 1, then obtain the coating sample that is solidified and molded by this powder coating according to the coating process of Example 1, test the various properties of coating, the results are shown in Table 2 .

Embodiment 3

[0059] A high-infrared fast-curing powder coating for coil steel, its composition and weight ratio are:

[0060]

[0061] Polyester polyester resin parameters (acid value 30-36mgKOH / g, viscosity 3500±500mPa·S)

[0062] Get above-mentioned each component and make powder coating according to the preparation method of Example 1, then obtain the coating sample that is solidified and molded by this powder coating according to the coating process of Example 1, test the various properties of coating, the results are shown in Table 2 .

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Abstract

The invention discloses high-infrared rapid-curing powder paint for coil steel. The high-infrared rapid-curing powder paint for the coil steel is prepared from, by weight, polyester resin, polyester-modified fluorocarbon resin with low molecular weight, a curing agent, a flatting agent, benzoin, packing and pigments. According to the powder paint, by adopting the polyester resin with the moderate viscosity and acid value to be compounded with the polyester-modified fluorocarbon resin with the low molecular weight, the coating surface condition and performance requirements are improved; curing can be achieved by performing high-infrared heating for 15-30 s, a cured powder coating is good in adhesive force and has the excellent weather resistance and alkali resistance. The powder paint has the advantages of being short in curing time, excellent in comprehensive performance and the like and can achieve energy conservation and environment protection.

Description

technical field [0001] The invention relates to the technical field of powder coatings, in particular to a high-infrared fast-curing powder coating for steel coils and a preparation method thereof. Background technique [0002] Powder coating is an indispensable process in various fields. One of the processes is the curing of the coating. The curing conditions and curing methods directly affect the film-forming quality of the powder coating in the film-forming process, and the quality of the coating will directly affect the coating quality. Decorative and durable during use. The traditional curing technology adopts hot air baking and gas furnace heating and baking, which has the disadvantages of large equipment footprint, high investment, low efficiency, and high energy consumption. In particular, the quality of baking and curing is generally poor in equipment that has been used for a long time, and the lower end of the workpiece in the furnace is not completely cured, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D5/03C09D7/12C08G63/682
Inventor 丁振刚高庆福杨小华
Owner GUANGZHOU KINTE IND
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