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Outdoor thermosetting powder paint and method for producing the same

A thermosetting powder and coating technology, applied in powder coatings, polyester coatings, coatings, etc., can solve problems such as aging time and short service life, weather resistance, poor mechanical properties, affecting the appearance of the coating film surface, etc., to achieve aging time Long, good weather resistance, good UV resistance effect

Inactive Publication Date: 2009-08-19
上海泰仕涂装材料厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing powder coating film is applied to cast aluminum and cast iron workpieces. It will generate a large number of air bubbles on the surface of the workpiece, which will affect the appearance of the coating surface. It is difficult to overcome in general, especially at high temperatures, it is easy to yellow, and the weather resistance, mechanical Poor performance, especially for outdoor painting, the aging time and service life are shorter than traditional paint, and the production cost is high, it is difficult to meet the needs of market development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1), stirring

[0022] Take 70 parts of carboxyl saturated polyester, 5 parts of triglycidyl isocyanurate, 1 part of acrylate homopolymer dispersed in fumed silica, 1 part of benzoin benzoin, amide compound wax and carbonate 1 part of the mixture, 1 part of butyral polymer, 0.8 part of benzophenones, 0.5 part of pentaerythritol ester, 1.5 parts of hydroxypolyethylene, 15 parts of kaolin are put into a mixing mixer, after 6 minutes of high-speed stirring, mix well raw material to extrusion process,

[0023] (2), extrusion

[0024] The above-mentioned uniformly mixed raw materials are extruded with a twin-screw extruder, and the extrusion temperature is 110°C in zone I and 115°C in zone II.

[0025] (3) Grinding

[0026] The crushed tablet is placed in a pulverizer for grinding, and then sieved through a 180-mesh sieve to obtain the product of the present invention. The particle size of the powder is about 39 μm.

Embodiment 2

[0028] (1), stirring

[0029] Take 70 parts of carboxyl saturated polyester, 5 parts of triglycidyl isocyanurate, 1 part of acrylate homopolymer dispersed in fumed silica, 1 part of benzoin benzoin, amide compound wax and carbonate 1 part of the mixture, 1 part of butyral polymer, 0.95 part of benzophenones, 0.5 part of pentaerythritol ester, 1.5 parts of hydroxypolyethylene, 18 parts of kaolin are put into a mixer, and after 8 minutes of high-speed stirring, mix well raw material to extrusion process,

[0030] (2), extrusion

[0031] The above-mentioned uniformly mixed raw materials are extruded with a twin-screw extruder, and the extrusion temperature is 110°C in zone I and 115°C in zone II.

[0032] (3) Grinding

[0033] The crushed tablet is placed in a pulverizer for grinding, and then sieved through a 180-mesh sieve to obtain the product of the present invention, and the particle size of the powder is about 36 μm.

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Abstract

The invention discloses an outdoor thermosetting powder coating, essentially comprising the flowing raw materials based on the parts by weight: 70 parts of carboxyl saturated polyester, 5 parts of triglycidyl isocyanurate, 1 part of flow agent, 1 part of benzoin, 1 part of defoamer, 1 part of flatting agent, 0.7-1 parts of ultraviolet absorbent, 0.5 parts of antioxidant, 1.5 parts of plasticizer and 15-20 parts of kaolin. The coating is obtained by stirring during mixing with high speed, extruding during heating, crushing during tabletting and sieving during grinding the raw materials. Compared with the prior art, the invention has the advantages of no foam on metal casting surface when coating, strong adhesive attraction, high mechanical property, good weather resistance property, efficient sunshine reflectivity, good ultraviolet resistance property, long aging time, long service life, no pollution, simple preparation technology and low cost.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an outdoor thermosetting powder coating and a preparation method thereof. Background technique [0002] The existing powder coating film is applied to cast aluminum and cast iron workpieces. It will generate a large number of bubbles on the surface of the workpiece, which will affect the appearance of the coating film surface. Generally, it is difficult to overcome, especially at high temperatures, it is easy to yellow, weather resistance, mechanical Poor performance, especially for outdoor painting, the aging time and service life are shorter than traditional paints, and the production cost is high, making it difficult to meet the needs of market development. SUMMARY OF THE INVENTION [0003] The object of the present invention is to provide a kind of outdoor thermosetting powder coating and its preparation method in view of the deficiencies of the prior art. The powder coati...

Claims

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Application Information

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IPC IPC(8): C09D167/00C09D5/03C09D7/06C09D7/12C09D7/47
Inventor 徐乐年
Owner 上海泰仕涂装材料厂
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