Low-temperature curing powder coating and preparation method thereof

A powder coating, low temperature technology, applied in the direction of powder coating, polyester coating, epoxy resin coating, etc., to achieve the effect of excellent hardness and good leveling

Inactive Publication Date: 2014-11-05
ANHUI HUAHUI SUYE TECH SHARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Powder coating compositions developed to date are essentially conventional curing, or have defic

Method used

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  • Low-temperature curing powder coating and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0032] A kind of low-temperature curing powder coating, it is made by following weight (kg) raw material:

[0033] Carboxylated polyester (acid value 35mg KOH / g) 40

[0034] epoxy resin 22

[0035] Crystalline Carboxyl Compound 10

[0036] Filler 25

[0037] Leveling agent 1.5

[0038] Tribenzylethylphosphonium bromide 0.5

[0039] Benzoin 0.7

[0040] Antistatic agent 0.3

[0041] The preparation method of above-mentioned low-temperature curing powder coating, it may further comprise the steps:

[0042] (1) All materials are weighed according to the ratio, placed in a high-speed mixer, and mixed for 2 minutes;

[0043] (2) The twin-screw foundation is adopted, the screw arrangement is a standard arrangement, and the extrusion temperature is controlled at 85 o around C;

[0044] (3) The extruded tablet is crushed to 40um particles;

[0045] (4) Particles are sieved with 180 mesh and packed for later use.

example 2

[0047] A kind of low-temperature curing powder coating, it is made by following weight (kg) raw material:

[0048] Carboxylated polyester (acid value 70mg KOH / g) 30

[0049] Epoxy 30

[0050] Crystalline Carboxylate 8

[0051] Filler 28

[0052] paint 2

[0053] Leveling agent 1.0

[0054] Tetrabutylammonium bromide 0.8

[0055] Benzoin 0.5

[0056] Antistatic agent 0.2

[0057] The preparation method of above-mentioned low-temperature curing powder coating, it may further comprise the steps:

[0058] (1) All materials are weighed according to the ratio, placed in a high-speed mixer, and mixed for 2 minutes;

[0059] (2) The twin-screw foundation is adopted, the screw arrangement is a standard arrangement, and the extrusion temperature is controlled at 88 o around C;

[0060] (3) The extruded material is crushed to 45um particles;

[0061] (4) Particles are sieved with 180 mesh and packed for later use.

example 3

[0063] A kind of low-temperature curing powder coating, it is made by following weight (kg) raw material:

[0064] Carboxylated polyester (acid value 55mg KOH / g) 40

[0065] epoxy resin 20

[0066] Crystalline Carboxylate 5

[0067] Filler 25

[0068] Pigment 8

[0069] Leveling agent 1.0

[0070] Benzyltriethylammonium bromide 0.3

[0071] Benzoin 0.5

[0072] Antistatic agent 0.2

[0073] The preparation method of above-mentioned low-temperature curing powder coating, it may further comprise the steps:

[0074] (1) All materials are weighed according to the ratio, placed in a high-speed mixer, and mixed for 2 minutes;

[0075] (2) The twin-screw foundation is adopted, the screw arrangement is a standard arrangement, and the extrusion temperature is controlled at 90 o around C;

[0076] (3) The extruded material is crushed to 40um particles;

[0077] (4) Particles are sieved with 180 mesh and packed for later use.

[0078] The powder coatings prepared by the above ...

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Abstract

The invention discloses a low-temperature curing powder coating. The coating comprises the following raw materials by weight: 30 to 60 parts of carboxyl polyester, 20 to 50 parts of epoxy resin, 5 to 40 parts of a crystal carboxyl compound, 20 to 40 parts of a filling material, 0 to 15 parts of a pigment, 1 to 1.5 parts of a leveling agent, 0.3 to 0.8 part of a catalyst, 0.5 to 0.8 part of benzoin and 0.3 to 1.0 part of an antistatic agent. The invention further discloses a preparation method for the powder coating. The powder coating prepared by using the above-mentioned formula and the method has the characteristic of low-temperature curing and can meet spraying requirements on nonmetal substrates, and a film formed by the coating has good comprehensive properties like levelability, luster, impact resistance, hardness and bendability.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a low-temperature curing powder coating and a preparation method thereof. Background technique [0002] Due to its economy, environmental protection and excellent performance, powder coating has attracted more and more people's attention. Among them, polyester / epoxy powder coatings account for more than 80% of the total powder coatings. From the perspective of energy saving and consumption reduction and coated substrates (MDF, plastic, wood, etc.), low-temperature curing of polyester / epoxy powder coatings has become an important part of the coating industry. new direction of development. [0003] For low-temperature curing powder coatings, high reactivity and good leveling have always been a contradiction, and the same is true for polyester / epoxy low-temperature curing powder coatings, so it is necessary to consider the factors that affect the reactivity of resins and curing agents, main...

Claims

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Application Information

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IPC IPC(8): C09D167/00C09D163/00C09D5/03
Inventor 刘荣兴丁运生费邦忠
Owner ANHUI HUAHUI SUYE TECH SHARE CO LTD
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