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Boiling-resistant powder coating as well as preparation method and application thereof

A technology of powder coating and water boiling resistance, which is applied in powder coatings, polyester coatings, coatings, etc., to achieve the effect of improving water boiling resistance and reducing process costs

Inactive Publication Date: 2022-02-11
ZHANGJIAGANG JIANGNAN POWDER COATING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing powder coatings lack this consideration

Method used

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  • Boiling-resistant powder coating as well as preparation method and application thereof
  • Boiling-resistant powder coating as well as preparation method and application thereof
  • Boiling-resistant powder coating as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] Secondly, the application also discloses a preparation method of water-resistant powder coating, comprising the following steps:

[0042] Pre-mixing: Weigh the raw materials by weight, put the raw materials into the mixer and mix them evenly. The mixing time is 15-20 minutes to ensure that the matting agent, curing agent and water resistance additive are fully mixed evenly.

[0043] Melt extrusion mixing: The raw materials are melt mixed and extruded with an extruder. Wherein, the extrusion conditions of the extruder are: the temperature of the first zone is 65-75°C, the temperature of the second zone is 75-85°C, and the temperature of the third zone is 75-85°C. This setting facilitates the control of the production gloss.

[0044] The extruded products are pressed into flakes with a tablet machine, crushed with a crusher, crushed with a pulverizer, screened with a rotary sieve to obtain powder coatings, and packed into boxes .

Embodiment 1

[0047] Take by weight the polyester resin of 74 parts by weight, the isocyanate curing agent of 1.5 parts by weight, the hydroxyl curing agent of 5 parts by weight, the matting agent of 4 parts by weight, the leveling agent of 1 part by weight, the benzoin of 0.4 parts by weight, 0.6 parts by weight of polytetrafluoroethylene micro-wax powder, 0.7 parts by weight of carbon black, 10 parts by weight of flaky silicon fillers and 1 part by weight of silane coupling agent; feeding: put the raw materials into the mixer and mix; premix : Use a Misaic mixer to mix the raw materials up and down evenly: Melt extrusion Mixing: Melt and mix the raw materials and extrude them with an extruder; Tabletting: Press the extruded bottom material into a sheet with a tablet machine: Crushing: Use The crusher crushes the flake bottom material; fine crushing: crush the bottom material with a pulverizer; sieve powder packaging: use a rotary sieve to screen the powder coating, and pack the coating int...

Embodiment 2

[0049] The difference from Example 1 is that the addition amount of polyester resin is 72 parts by weight, and the addition amount of flaky silicon filler is 12 parts by weight.

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Abstract

The invention discloses a boiling-resistant powder coating. The coating is applied to the surface of a hub and comprises polyester resin, a curing agent, a matting agent, a water-resistant filler and a water-resistant additive. According to the powder coating, polyester resin and a matting agent are matched, so the requirements for super-leveling and matting of the powder coating are met; and the powder coating can form enough thickness through one-time spraying, so the coating process of the hub is simplified. Meanwhile, the water-resistant filler and the water-resistant additive are added into the powder coating, so the requirements for boiling resistance and scratch resistance of a coating film are met, and the hub can adapt to high-temperature and rainwater environments.

Description

technical field [0001] The present application relates to the technical field of powder coatings, in particular to a boiling-resistant powder coating and its preparation method and application. Background technique [0002] As an important part of vehicles such as automobiles and motorcycles, wheels not only have the safety requirements of bearing the weight and driving load of the entire vehicle, but also have the aesthetic requirements of balancing the appearance of the entire vehicle. The material of the wheels has also gradually developed from steel rings to aluminum alloys. wheel. At present, aluminum alloy wheels mainly achieve the purpose of beauty and protection through surface coating. The existing wheel coating process includes pretreatment, spraying base powder, spraying color paint, spraying transparent powder and other steps in sequence. This process has stable coating performance, excellent corrosion resistance and aging resistance, but requires three spraying...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D5/03C09D7/61C09D7/63B29C48/92B02C21/00
CPCC09D167/00C09D5/033C09D5/032B29C48/92B02C21/00C08K7/00C08K5/54
Inventor 黎永新王飞田晖
Owner ZHANGJIAGANG JIANGNAN POWDER COATING
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