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Powdery paint for aluminum profile and preparation method thereof

A technology for powder coatings and aluminum profiles, applied in powder coatings, polyester coatings, coatings, etc., can solve the problems of environmental and human health effects, unstable performance, and easy generation of pinholes in the coating film.

Active Publication Date: 2012-06-27
广东华江粉末科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The curing temperature of the coating film is high, generally 200°C
[0004] 2. Under high temperature curing, the low-molecular organic matter remaining in TGIC is easy to volatilize, which will have a certain impact on the environment and human health
[0005] Although there are also low-curing powder coatings, such as β-hydroxyalkylamide (HAA) system low-temperature curing powder coatings, for this kind of powder coatings, water molecules will evaporate during the curing reaction, resulting in pinholes in the coating film. , especially β-hydroxyalkyl amides have the inherent defects of amines, which makes the coating film cured by HAA easy to turn yellow and unstable in performance

Method used

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  • Powdery paint for aluminum profile and preparation method thereof
  • Powdery paint for aluminum profile and preparation method thereof
  • Powdery paint for aluminum profile and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 624g of carboxy-terminated saturated polyester resin, 52g of triglycidyl isocyanurate (TGIC), 250g of titanium dioxide, 50g of precipitated barium sulfate, 10g of brightener, 15g of leveling agent, and 4g of benzoin for premixing. Then the pre-mixed raw materials are melted and extruded to uniformly disperse, and the melt-extruded refers to the use of a twin-screw extruder to melt, knead and evenly disperse the pre-mixed raw materials, wherein the temperature in zone I of the extruder is 115-125°C, the temperature in zone II of the extruder is 105-115°C; then, the extruded material is crushed and finely crushed after being cooled by a sheeting roller. Fine crushing refers to classification by an ACM mill Pulverize until the particle size of the powder is 20-80 microns; finally, sieve the finely pulverized powder coating with a standard sieve to obtain the powder coating for aluminum profiles of the present invention.

Embodiment 2

[0032] Take 605g of carboxy-terminated saturated polyester resin, 46g of triglycidyl isocyanurate (TGIC), 250g of titanium dioxide, 70g of precipitated barium sulfate, 10g of brightener, 15g of leveling agent, and 4g of benzoin for premixing. Then the pre-mixed raw materials are melted and extruded to uniformly disperse, and the melt-extruded refers to the use of a twin-screw extruder to melt, knead and evenly disperse the pre-mixed raw materials, wherein the temperature in zone I of the extruder is 115-125°C, the temperature in zone II of the extruder is 105-115°C; then, the extruded material is crushed and finely crushed after being cooled by a sheeting roller. Fine crushing refers to classification by an ACM mill Pulverize until the particle size of the powder is 20-80 microns; finally, sieve the finely pulverized powder coating with a standard sieve to obtain the powder coating for aluminum profiles of the present invention.

Embodiment 3

[0034] Take 577g of carboxy-terminated saturated polyester resin, 44g of triglycidyl isocyanurate (TGIC), 250g of titanium dioxide, 100g of precipitated barium sulfate, 10g of brightener, 15g of leveling agent, and 4g of benzoin for premixing. Then the pre-mixed raw materials are melted and extruded to uniformly disperse, and the melt-extruded refers to the use of a twin-screw extruder to melt, knead and evenly disperse the pre-mixed raw materials, wherein the temperature in zone I of the extruder is 115-125°C, the temperature in zone II of the extruder is 105-115°C; then, the extruded material is crushed and finely crushed after being cooled by a sheeting roller. Fine crushing refers to classification by an ACM mill Pulverize until the particle size of the powder is 20-80 microns; finally, sieve the finely pulverized powder coating with a standard sieve to obtain the powder coating for aluminum profiles of the present invention.

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Abstract

The invention discloses a powdery paint for aluminum profile and a preparation method thereof. The powdery paint is composed of carboxyl-terminated saturated polyester resin, triglycidyl isocyanurate (TGIC), titanium dioxide, precipitated barium sulfate, a brightener, a leveling agent and benzoin. The preparation method contains the following steps of: batch mixing, melt extrusion, crushing and ultrafine comminution. The powdery paint for aluminum profile has low curing temperature. By the adoption of the powdery paint, volatilization amount of residual TCIC low molecular organic matter is reduced. The powdery paint is beneficial to environmental protection and the health of human body. In addition, the appearance of the film is more flattening and fine.

Description

technical field [0001] The present invention relates to a powder coating and a preparation method for the powder coating. Background technique [0002] The main disadvantages of the original polyester / TGIC powder coating are: [0003] 1. The curing temperature of the coating film is high, generally 200°C. [0004] 2. Under high temperature curing, the low-molecular organic matter remaining in TGIC is easy to volatilize, which will have a certain impact on the environment and human health. [0005] Although there are also low-curing powder coatings, such as β-hydroxyalkylamide (HAA) system low-temperature curing powder coatings, for this kind of powder coatings, water molecules will evaporate during the curing reaction, resulting in pinholes in the coating film. , especially β-hydroxyalkyl amides have the inherent defects of amines, which makes the coating film cured by HAA easy to turn yellow and unstable. Contents of the invention [0006] The purpose of the present in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D5/03C09D7/12
Inventor 魏育福马传安蔡英进
Owner 广东华江粉末科技有限公司
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