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High-hydrophobicity powder coating and application thereof

A powder coating, hydrophobic technology, applied in powder coatings, polyester coatings, coatings, etc., can solve problems such as poor heat and humidity resistance, and achieve good weather resistance and heat and humidity resistance.

Inactive Publication Date: 2020-09-15
佛山市涂亿装饰材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is the problem of poor heat and humidity resistance of the coating film formed by the powder coating, providing a kind of highly hydrophobic powder coating and its application

Method used

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  • High-hydrophobicity powder coating and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] A highly hydrophobic powder coating, comprising: 70% polyester resin, 5% curing agent, 0.4% sanding agent, 0.3% bentonite, 0.6% polytetrafluoroethylene wax powder, 0.4% antioxidant, 0.8% carbon black , barium sulfate 22.5%.

[0032] A kind of highly hydrophobic powder coating. Polyester resin, curing agent, sanding agent, bentonite, polytetrafluoroethylene wax powder, antioxidant, carbon black, barium sulfate are mixed uniformly, heated and kneaded, and extruded after the kneading is completed. 1. After the tablet is cooled, it is crushed and ground to obtain a powder coating. The mixing time is 5 minutes. The heating, kneading and extrusion are carried out by a twin-screw extruder, the temperature of the first zone of the extruder is 100°C, and the temperature of the second zone of the extruder is 105°C. The flow velocity of the melt during the kneading process is: 300g / min. The particle size of the powder coating is 25 μm. The rotation frequency of the screw durin...

Embodiment 2

[0036] A highly hydrophobic powder coating, including: 60% polyester resin, 5.6% curing agent, 0.5% sanding agent, 0.4% bentonite, 1% polytetrafluoroethylene wax powder, 0.5% antioxidant, 1% carbon black , barium sulfate 31%.

[0037] A kind of highly hydrophobic powder coating. Polyester resin, curing agent, sanding agent, bentonite, polytetrafluoroethylene wax powder, antioxidant, carbon black, barium sulfate are mixed uniformly, heated and kneaded, and extruded after the kneading is completed. 1. After the tablet is cooled, it is crushed and ground to obtain a powder coating. The mixing time is 3 minutes. The heating, kneading and extrusion are carried out by a twin-screw extruder, the temperature of the first zone of the extruder is 100°C, and the temperature of the second zone of the extruder is 105°C. The flow velocity of the melt during the kneading process is: 300g / min. The particle size of the powder coating is 25 μm. The rotation frequency of the screw during the...

Embodiment 3

[0040] A highly hydrophobic powder coating, comprising: polyester resin 73.7%, curing agent 4.5%, sanding agent 0.3%, bentonite 0.2%, polytetrafluoroethylene wax powder 0.5%, antioxidant 0.3%, carbon black 0.5% , barium sulfate 20%.

[0041] A kind of highly hydrophobic powder coating. Polyester resin, curing agent, sanding agent, bentonite, polytetrafluoroethylene wax powder, antioxidant, carbon black, barium sulfate are mixed uniformly, heated and kneaded, and extruded after the kneading is completed. 1. After the tablet is cooled, it is crushed and ground to obtain a powder coating. The mixing time is 7 minutes. The heating, kneading and extrusion are carried out by a twin-screw extruder, the temperature of the first zone of the extruder is 100°C, and the temperature of the second zone of the extruder is 105°C. The flow velocity of the melt during the kneading process is: 300g / min. The particle size of the powder coating is 25 μm. The rotation frequency of the screw durin...

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Abstract

The invention relates to the field of powder coating production, provides a high-hydrophobicity powder coating and an application thereof, and is used for solving the problem of poor damp-heat resistance of a coating film formed by the powder coating. The invention provides a high-hydrophobicity powder coating. The high-hydrophobicity powder coating is prepared from 60%-75% of polyester resin, 4.5%-5.6% of a curing agent, 0.3%-0.5% of a sand streak agent, 0.2%-0.4% of bentonite, 0.5%-1% of polytetrafluoroethylene wax powder, 0.3%-0.5% of an antioxidant, 0.5%-1% of carbon black and the balancebarium sulfate. The coating gloss and color can be kept for a long time, and the film surface can be kept in an original state for a long time in a humid and hot environment.

Description

technical field [0001] The invention relates to the field of powder coating production, in particular to a highly hydrophobic powder coating and its application. Background technique [0002] In a humid environment, liquid coatings have defects such as low film strength, long coating construction time, and VOC emissions. At the same time, in the outdoor environment, the coating film is easily irradiated by ultraviolet rays, causing the surface structure of the coating film to be destroyed, so that the weather resistance and heat and humidity resistance of the coating film are significantly reduced. [0003] Powder coating is a new type of solvent-free 100% solid powder coating. The powder coating currently used is mixed with special resins, pigments, fillers, curing agents and other additives in a certain proportion, and then squeezed, crushed prepared by other processes. Powder coating has the advantages of easy storage at room temperature, high utilization rate and easy ...

Claims

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Application Information

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IPC IPC(8): C09D167/00C09D5/03C09D7/65C09D7/61B05D1/06B05D3/02
CPCB05D1/06B05D3/0254C08K2003/3045C08L2201/08C08L2205/03C09D5/033C09D167/00C08L27/18C08L23/06C08K13/02C08K3/04C08K3/30C08K3/346C08L23/12
Inventor 吴延军
Owner 佛山市涂亿装饰材料科技有限公司