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Weather resistance powder coating

A powder coating and weather-resistant technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problems of coating requirements that cannot meet outdoor high weather resistance, high production conditions, immature technology, etc., and achieve excellent Appearance, improved leveling performance, improved weather resistance

Inactive Publication Date: 2009-12-23
宁波派特勒新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the weather-resistant powder coatings applied to metal materials are mainly polyester and polyurethane powder coatings. Although they have certain weather resistance properties, they cannot meet the requirements of outdoor high weather resistance coatings.
In addition, weather-resistant powder coatings also include fluororesin powder coatings and silicone resin powder coatings, but these two types of weather-resistant powder coatings have disadvantages such as high resin cost, immature technology, and high production conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Adopt formula as follows:

[0025] Hydroxy acrylic resin with a hydroxyl value of 35mg 35%

[0026] Carboxyl-terminated polyester resin with an acid value of 60 mgKOH / g 34.4%

[0027] Tetramethoxymethyl glycoluril 3%

[0028] Acrylate leveling agent 0.8%

[0029] Barium Sulfate 25%

[0030] Benzoin 0.8%

[0031] Carbon black 1%

[0032] Accurately weigh the material according to the composition of the formula, put it in a high-speed mixer and mix it for 3 minutes; extrude the mixed material with a powder coating extruder at a temperature of 90°C; grind the extruded material with a powder coating mill to an average particle size of 40~ 50 micron powder particles; the powder is sieved with a 180-mesh sieve, and the passing product is a qualified product.

[0033] The paint produced according to the above-mentioned production process is sprayed by high-voltage electrostatic spraying, the voltage is 60KV, the average film thickness is 60-80 microns, and the curing con...

Embodiment 2

[0039] Adopt formula as follows:

[0040] Hydroxy acrylic resin with a hydroxyl value of 35mg 41%

[0041] Carboxyl-terminated polyester resin with an acid value of 60mgKOH / g 30%

[0042] Tetramethoxymethyl glycoluril 5%

[0043] Acrylate leveling agent 1.2%

[0044] Barium Sulfate 20%

[0045] Benzoin 1.5%

[0046] Phthalocyanine 0.6%

[0047] Everlasting Violet 0.7%

[0048] Accurately weigh the material according to the composition of the formula, put it in a high-speed mixer and mix it for 5 minutes; extrude the mixed material with a powder coating extruder at a temperature of 100°C; grind the extruded material with a powder coating mill to an average particle size of 40~ 50 micron powder particles; the powder is sieved with a 180-mesh sieve, and the passing product is a qualified product.

[0049] The paint produced according to the above-mentioned production process is sprayed by high-voltage electrostatic spraying, the voltage is 60KV, the average film thickness ...

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Abstract

The invention discloses a weather resistance powder coating, comprising the following components: 35%-45% of hydroxylated acrylic resin with a hydroxyl value of 35-45mg / a, 30%-35% of terminal carboxy polyester resin with a acid value of 60-70mg KOH / g, 3%-5% of tetramethoxy methyl glycoluril, 0.5%-1.3% of acrylic type flatting agent, 20%-30% of barium sulfate, and 0.5%-1.5% of benzoin. The weather resistance of the powder coating of the invention is greatly improved, 480h QUV-B(accelerated photo-ageing test) gloss retention of the powder coating is increased from 50% which is the gloss retention of the traditional polyester powder coating to 95% so that the outdoor high weather resistance coating requirements can be satisfied; the cost of the invention is lower than that of fluorocarbon resin powder coating and organosilicon resin powder coating (the cost can be reduced by about 50%).

Description

technical field [0001] The invention relates to a weather-resistant powder coating. Background technique [0002] At present, the weather-resistant powder coatings used for coating metal materials are mainly polyester and polyurethane powder coatings. Although they have certain weather resistance properties, they cannot meet the high weather resistance coating requirements for outdoors. In addition, weather-resistant powder coatings include fluororesin powder coatings and silicone resin powder coatings, but these two types of weather-resistant powder coatings have high resin costs, immature technology, and high production conditions. [0003] Therefore, in order to meet the needs of weather resistance and low cost, it is urgent to develop a weather resistant powder coating that can meet the coating requirements of outdoor high weather resistance and low production cost. Contents of the invention [0004] The technical problem to be solved by the present invention is to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D167/00C09D7/12C09D7/06C09D5/03C09D7/47
Inventor 祝智程红华
Owner 宁波派特勒新材料股份有限公司
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