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Super-weatherable pure-fluorine carbon powder coating for aluminum surface and preparation method and application thereof

A technology for powder coating and aluminum surface, which is applied in the field of super-weather-resistant pure fluorocarbon powder coating for aluminum surface and its preparation field, which can solve the problems of reducing the weather resistance of the coating film, reducing the content of fluororesin, and obvious orange peel on the surface, etc. The effect of improving weather resistance, increasing hardness, and promoting sufficient reaction

Inactive Publication Date: 2017-06-13
山东千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

However, the current domestic technology is not mature enough, such as coating adhesion, poor impact resistance, poor yellowing resistance, and obvious orange peel on the surface
For this reason, most manufacturers use 20%-30% super weather-resistant polyester resin for modification to improve the above defects, but this will greatly reduce the content of fluororesin in the coating, which will significantly reduce the weather resistance of the coating film

Method used

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  • Super-weatherable pure-fluorine carbon powder coating for aluminum surface and preparation method and application thereof
  • Super-weatherable pure-fluorine carbon powder coating for aluminum surface and preparation method and application thereof
  • Super-weatherable pure-fluorine carbon powder coating for aluminum surface and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare the aluminum surface with super strong weather resistance pure fluorocarbon powder coating according to the following steps:

[0032] (1) premix the following raw materials by weight percentage:

[0033]

[0034] Wherein, the hydroxyl value of the FEVE fluorocarbon resin is 46mgKOH / g; the total amount of NCO of the isophorone diisocyanate trimer is 14.8%; the flexible agent has a particle size of 25 μm; the polytetrafluoroethylene The median particle size is 5 μm.

[0035] (2) Melt, knead and evenly disperse the pre-mixed raw materials with a twin-screw extruder, and extrude them. ℃, extrusion screw frequency 30-50Hz; tableting, coarse crushing;

[0036] (3) The crushed material is graded and crushed with an ACM mill, the frequency of the main mill is 40-55Hz, and the frequency of the auxiliary mill is 25-45Hz;

[0037] (4) Pass the finely pulverized material through a 160-180 mesh standard sieve and classify it into a powder coating.

[0038] The powder ...

Embodiment 2

[0042] Prepare the aluminum surface with super strong weather resistance pure fluorocarbon powder coating according to the following steps:

[0043] (1) premix the following raw materials by weight percentage:

[0044]

[0045] Wherein, the hydroxyl value of the FEVE fluorocarbon resin is 47mgKOH / g; the total amount of NCO of the isophorone diisocyanate trimer is 15%; the particle size of the flexible agent is 27 μm; the polytetrafluoroethylene The median particle size is 4.5 μm.

[0046] (2) Melt, knead and evenly disperse the pre-mixed raw materials with a twin-screw extruder, and extrude them. ℃, extrusion screw frequency 30-50Hz; tableting, coarse crushing;

[0047] (3) The crushed material is graded and crushed with an ACM mill, the frequency of the main mill is 40-55Hz, and the frequency of the auxiliary mill is 25-45Hz;

[0048] (4) Pass the finely pulverized material through a 160-180 mesh standard sieve and classify it into a powder coating.

[0049] The powder...

Embodiment 3

[0053] Prepare the aluminum surface with super strong weather resistance pure fluorocarbon powder coating according to the following steps:

[0054] (1) premix the following raw materials by weight percentage:

[0055]

[0056]

[0057] Wherein, the hydroxyl value of the FEVE fluorocarbon resin is 48mgKOH / g; the total amount of NCO of the isophorone diisocyanate trimer is 15.2%; the flexible agent has a particle size of 29 μm; the polytetrafluoroethylene The median particle size is 4.8 μm.

[0058] (2) Melt, knead and evenly disperse the pre-mixed raw materials with a twin-screw extruder, and extrude them. ℃, extrusion screw frequency 30-50Hz; tableting, coarse crushing;

[0059] (3) The crushed material is graded and crushed with an ACM mill, the frequency of the main mill is 40-55Hz, and the frequency of the auxiliary mill is 25-45Hz;

[0060] (4) Pass the finely pulverized material through a 160-180 mesh standard sieve and classify it into a powder coating.

[006...

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Abstract

The invention discloses super-weatherable pure-fluorine carbon powder coating for aluminum surface and a preparation method and application thereof. The super-weatherable pure-fluorine carbon powder coating for aluminum surface is prepared from, by weight, 62-70% of FEVE (fluoroethylene vinyl ether) fluorocarbon resin, 14.5-17.5% of isophorone diisocyanate, 3-17% of chloride process titanium dioxide, 0-5% of barite powder, 1.5-2.0% of a leveling agent, 0.3-0.8% of a brightener, 0-0.5% of stannous octoate catalyst, 0.2-0.4% of an antioxidant, 3-8% of a softener, 0.5-3% of nano titanium dioxide, 0.2-0.5% of benzoin, 0.3-1% of polytetrafluoroethylene, and 0.05-0.2% of carbon black. The super-weatherable pure-fluorine carbon powder coating for aluminum surface is brand-new pure-fluorine carbon powder coating employing fluorocarbon resin as base material with no other resin doped, weatherability of a coating film is improved significantly, and the problem that domestic existing fluorocarbon powder coatings are poor in adhesion, impact resistance and yellowing resistance and have apparent cedrate can be solved.

Description

technical field [0001] The invention belongs to the field of powder coatings, and in particular relates to a super-weather-resistant pure fluorocarbon powder coating for aluminum surfaces and a preparation method and application thereof. Background technique [0002] Thermosetting pure fluorocarbon powder coatings have excellent weather resistance, and can be used outdoors for up to 20-30 years. However, the current domestic technology is not mature enough, such as coating adhesion, poor impact resistance, poor yellowing resistance, and obvious orange peel on the surface. For this reason, most manufacturers use 20%-30% super weather-resistant polyester resin for modification to improve the above defects, but this will greatly reduce the content of fluororesin in the coating and significantly reduce the weather resistance of the coating film. In order to meet the coating requirements of permanent landmark buildings such as super high-rise buildings and cross-sea bridges, so ...

Claims

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Application Information

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IPC IPC(8): C09D127/12C09D5/03C09D7/12
CPCC09D127/12C08K2201/011C08L2201/08C08L2205/02C09D5/033C08L27/18C08K13/02C08K3/04C08K2003/2241C08K5/29C08K2003/2227
Inventor 魏育福蔡劲树刘飞黄焯轩吴严明
Owner 山东千江粉末科技有限公司
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