Extra weather-resistant micro-spherical powder coating used for metal coiled material and prepared through supercritical fluid technology and preparation method thereof

A supercritical fluid, metal coil technology, used in powder coatings, polyester coatings, coatings, etc., can solve the problems of difficulty in meeting its requirements, and achieve improved flatness, good weather resistance, and high particle size distribution concentration. Effect

Active Publication Date: 2017-05-10
江苏多孚多智能装备科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Since powder coatings for metal coils require some specific properties, it is difficult to meet their requirements using traditional powder coating preparation p

Method used

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  • Extra weather-resistant micro-spherical powder coating used for metal coiled material and prepared through supercritical fluid technology and preparation method thereof
  • Extra weather-resistant micro-spherical powder coating used for metal coiled material and prepared through supercritical fluid technology and preparation method thereof
  • Extra weather-resistant micro-spherical powder coating used for metal coiled material and prepared through supercritical fluid technology and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The super-weather-resistant microspherical powder coating for metal coils prepared by the supercritical fluid technology of this embodiment is made of the raw materials in the following mass percentages:

[0036]

[0037] The triglycidyl isocyanurate curing agent described in the raw material formula requires its total chlorine (organic chlorine and inorganic chlorine) content to be less than or equal to 0.4%.

[0038] Put the raw materials into the supercritical reactor and mix them evenly, and control the CO in the reactor 2 The content is 55wt%, the temperature is 55°C, and the pressure is 90Kg / cm 2 , the outlet temperature was 70°C. A super weather-resistant microspherical powder coating for metal coils with a particle size D50 of 18 μm was prepared.

[0039] The specific performance of the product of this embodiment is shown in Table 1.

Embodiment 2

[0041] The super-weather-resistant microspherical powder coating for metal coils prepared by the supercritical fluid technology of this embodiment is made of the raw materials in the following mass percentages:

[0042]

[0043] The triglycidyl isocyanurate curing agent described in the raw material formula requires its total chlorine (organic chlorine and inorganic chlorine) content to be less than or equal to 0.4%.

[0044] Put the raw materials into the supercritical reactor and mix them evenly, and control the CO in the reactor 2 The content is 35wt%, the temperature is 48°C, and the pressure is 110Kg / cm 2 , the outlet temperature was 56°C. A super weather-resistant microspherical powder coating for metal coils with a particle size D50 of 22 μm was prepared.

[0045] The specific performance of the product of this embodiment is shown in Table 1.

Embodiment 3

[0047] The super-weather-resistant microspherical powder coating for metal coils prepared by the supercritical fluid technology of this embodiment is made of the raw materials in the following mass percentages:

[0048]

[0049] The triglycidyl isocyanurate curing agent described in the raw material formula requires its total chlorine (organic chlorine and inorganic chlorine) content to be less than or equal to 0.4%.

[0050] Put the raw materials into the supercritical reactor and mix them evenly, and control the CO in the reactor 2 The content is 42wt%, the temperature is 68°C, and the pressure is 70Kg / cm 2 , the outlet temperature was 64°C. A super weather-resistant microspherical powder coating for metal coils with a particle size D50 of 14 μm was prepared.

[0051] The specific performance of the product of this embodiment is shown in Table 1.

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Abstract

The invention belongs to the technical field of powder coatings, and specifically relates to an extra weather-resistant micro-spherical powder coating used for a metal coiled material and prepared through a supercritical fluid technology and a preparation method thereof. The micro-spherical powder coating is made of, by mass percentage, 35-88 parts of poly-isophthalic acid neopentyl glycol polyester resin, 0.1-10 parts of semi-crystalline polyester resin, 3.2-7 parts of triglycidyl Isocyanurate, 0.1-1.6 parts of benzyl triethyl ammonium chloride, 1-10 parts of kynar fluororesin, 0.5-1.5 parts of acrylic ester, 0.2-1 part of benzoin, 0.1-0.8 part of pentaerythritol ester, 0.2-26 parts of pigment and 0-3 parts of other auxiliaries. A supercritical fluid technology is adopted, and the extra weather-resistant micro-spherical powder coating has the advantages of being simple in process and stable in product quality. The powder coating particles are micro-spherical, small in grain size and concentrated in grain distribution range, the surface is flat when thin coating of the metal coiled material is performed, and the extra weather-resistant micro-spherical powder coating is good in weather resistance, flexibility and low-temperature performance and suitable for fast coating of the metal coiled material.

Description

technical field [0001] The invention belongs to the technical field of powder coatings, in particular to a super-weather-resistant microspherical powder coating for metal coils prepared by supercritical fluid technology and a preparation method thereof. Background technique [0002] Powder coatings do not contain any solvents and are 100% solid powder coatings. Because the powder coating has the advantages of zero VOC emission, no pollution to the atmospheric environment, the ground powder coating that has not been sprayed on the workpiece can be recycled, energy and resources are saved, labor intensity is reduced, and the comprehensive performance of the coating film is excellent. In the past few decades, it has been rapidly promoted and applied in metal products and heat-sensitive material products. And with the continuous improvement of environmental protection requirements and energy conservation requirements in various countries in recent years, some coating materials ...

Claims

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Application Information

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IPC IPC(8): C09D167/02C09D167/00C09D127/16C09D5/03C09D7/12
CPCC08L2201/08C08L2205/02C08L2205/03C09D5/03C09D7/63C09D167/02C08L67/00C08L27/16C08K5/3492C08K5/19C08K5/101C08K5/07C08K5/103C08K5/00Y02P20/54
Inventor 肖建刚刘雷吴建群王云飞李宝
Owner 江苏多孚多智能装备科技有限公司
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