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Powder coating compositions

A technology of powder coating and composition, which is applied in the direction of powder coating, coating, thin material processing, etc., and can solve the problems of inflexibility, long turnaround time, uneconomical cost, etc.

Inactive Publication Date: 2006-07-05
INT COATINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Speed ​​of delivery to the consumer is also an important consideration, while conventional powder coating manufacturing methods that rely on pre-mixing, extrusion and grinding as separate processes result in long turnaround times and insufficient production of products in small batches. Economy
Inventory of a wide range of products solves the problem of speed of delivery, but this is a very inflexible approach and is not cost-effective

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0208] One containing:

[0209] Component A 187.5g

[0210] Component B 16.7g

[0211] Component C 100.0g

[0212] Component D 695.8 g of the mixture were mixed together in a Henschel FM10 mixer for a total of 30 minutes, the temperature of the water jacket was taken to 54°C. The agglomerated powder was sieved through a 110 μm steel screen, and then electrostatically sprayed onto aluminum Q panels by a Gema PCG-1 corona spray gun. This will then be baked at the recommended time and temperature.

[0213] A smooth glossy coating with a uniform tinge of pink is produced.

Embodiment 2

[0215] Put one containing:

[0216] Component A 187.5g

[0217] Component B 16.7g

[0218] Component C 100.0g

[0219] Component D 545.8g

[0220] Component E 150.0 g of the mixture was agglomerated, coated onto the substrate as in Example 1 and baked.

[0221] As indicated by their acid values, the polyesters of Component E have a different functionality than Components A-D, and thus have different gel times, resulting in a smooth matte coating, which at 60 The ° angles are 30% glossy with a uniform dusky pink color.

Embodiment 3

[0223] One containing:

[0224] Component A 65g

[0225] Component B 75g

[0226] Component C 80g

[0227] Component D 760g

[0228] 20 g of the mixture of Component F were mixed together in a Henschel FM10 mixer for a total of 30 minutes, taking the temperature to 54°C. The agglomerated powder was sieved through a 110 μm steel screen, and then electrostatically sprayed onto aluminum Q panels by a Gema PCG-1 corona spray gun. This will then be baked at the recommended time and temperature.

[0229] A textured glossy coating with a uniform dark brown color was produced.

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Abstract

The invention provides a powder coating composition in which powder particles are an agglomerate of individual particulate components fused or bonded together into composite particles. Maximizing the amount of larger-sized uncolored component(s) gives cost advantages, and the invention allows a rapid and flexible manufacture of a range of colored powder coating compositions.

Description

field of invention [0001] The present invention relates to powder coating compositions and their use. [0002] Powder coating compositions generally contain a solid film-forming resin, usually one or more colorants such as pigments, and optionally they also contain one or more performance additives. They are usually thermoset, eg combining a film-forming polymer and a corresponding curing agent (which may itself be another film-forming polymer). [0003] The above compositions are prepared by direct mixing of the ingredients, including any colorants and performance additives, eg in an extruder, at a temperature above the softening point of the film-forming polymer but below the temperature at which significant prereaction occurs. The extrudate is usually rolled into flat sheets and comminuted, eg by grinding, to the desired particle size ("micronisation"). The desired size distribution for most commercial electrostatic spray devices is up to 120 microns, typically 10-120 mic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/03
CPCC09D5/03Y10S525/934Y10S524/904Y10T428/31794C09D5/032
Inventor A·G·科尔蒂纳
Owner INT COATINGS
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