A kind of modified fluorocarbon powder coating for aluminum surface and preparation method thereof

A modified fluorocarbon and powder coating technology, applied in powder coatings, coatings, etc., can solve the problems of poor impact resistance, poor adhesion, poor pigment and filler dispersibility, etc., to reduce costs, excellent weather resistance, and reduce van der Waals force Effect

Active Publication Date: 2020-08-11
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

[0004] The purpose of the present invention is to overcome the problems of poor adhesion, poor impact resistance and poor dispersion of pigments and fillers in existing thermosetting fluorocarbon powder coatings, and to provide a coating with excellent weather resistance, outstanding chemical corrosion resistance, good adhesion and Modified fluorocarbon powder coating for aluminum surface without impact resistance and other mechanical properties and its preparation method

Method used

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  • A kind of modified fluorocarbon powder coating for aluminum surface and preparation method thereof
  • A kind of modified fluorocarbon powder coating for aluminum surface and preparation method thereof
  • A kind of modified fluorocarbon powder coating for aluminum surface and preparation method thereof

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preparation example Construction

[0056] The preparation method of the modified fluorocarbon powder coating for the aluminum surface, its process is as attached figure 1 shown, including the following steps:

[0057] (1) The raw materials of the A and B component formulas are premixed according to their corresponding weight percentages;

[0058] (2) Melt and mix the raw materials of components A and B after premixing;

[0059] (3) Compress the materials of components A and B after extrusion, and then crush and finely pulverize them after cooling;

[0060] (4) Classifying and screening the finely pulverized component A and component B powders respectively;

[0061] (5) The modified fluorocarbon powder coating is prepared by thermally bonding and mixing the graded and screened powders of components A and B according to a weight ratio of 1:9 to 9:1.

[0062] The thermal bonding mixing process of the step (5) includes adding the A and B component powders into the mixing device according to the weight percentage...

Embodiment 1

[0065] Prepare modified fluorocarbon powder coating sample powder 1-6 for aluminum surface according to the following steps:

[0066] In the first step, pre-mix the raw materials of the following components A and B respectively according to the weight percentage,

[0067] A component name weight% Component B ingredient name weight% Thermosetting Fluorocarbon Resin 64.0 Acrylic 62.0 Isocyanate curing agent 16.0 Polycarboxylic acid (anhydride) 14.6 leveling agent 1.2 leveling agent 1.0 Toughener 0.3 Dispersing aid 0.3 Dispersant 0.3 Other additives 1.7 coupling agent 1.0 filler 8.4 Other additives 1.5 Inorganic Ceramic Pigments 12.0 filler 3.7 Inorganic Ceramic Pigments 12.0

[0068] In the second step, the pre-mixed component A and B raw materials are melted and mixed extruded with a twin-screw extruder, wherein the temperature of the extruder I zone is 110°C, and the temperatu...

Embodiment 2

[0074] Prepare modified fluorocarbon powder coating samples 7-9 according to the following steps:

[0075] In the first step, the raw materials in the following weight percentages are premixed,

[0076] Sample Powder Component Name Sample powder 7% by weight Sample powder 8% by weight Sample powder 9% by weight Thermosetting Fluorocarbon Resin 44.8 32.0 19.2 Isocyanate curing agent 11.2 8.0 4.8 Acrylic 19.4 32.4 45.4 Polycarboxylic acid (anhydride) 4.6 7.6 10.6 leveling agent 1.2 1.2 1.2 Toughener 0.3 0.3 0.3 Dispersant 0.3 0.3 0.3 coupling agent 1.0 1.0 1.0 Other additives 1.5 1.5 1.5 filler 3.7 3.7 3.7 Inorganic Ceramic Pigments 12.0 12.0 12.0

[0077] In the second step, the pre-mixed raw materials are melt-mixed and extruded with a twin-screw extruder. Zone I of the extruder is the melting and mixing section of the extruder, and zone II of the extruder is the feeding...

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Abstract

The invention discloses a modified fluorocarbon powder coating used for an aluminum surface and a preparation method of the coating. A fluorocarbon curing system and an acrylic resin curing system arerespectively used as a base material, materials such as a levelling agent, a flexibilizer, a dispersing agent, a coupling agent and an inorganic ceramic pigment are used, so that a single-component powder coating A and a single-component powder coating B are prepared; and the coating A and the coating B are subjected to a novel thermal bonding mixing process according to the weight ratio of 1:9 to 9:1, so that the modified fluorocarbon powder coating is obtained. The preparation method adopted by the invention is green, environmentally friendly, safe and inexpensive, and can obviously increase the content of a fluorocarbon system that migrates to the surface of the coating, thereby enabling the advantages of the fluorocarbon system to be played to a maximum limit; and the modified fluorocarbon powder coating provided by the invention maintains the excellent weather resistance and chemical corrosion resistance of a fluorocarbon coating, enhances the adhesion of a coating film, improvesthe storage stability of powder without affecting the decorative effect of the powder coating, and has relatively low comprehensive costs.

Description

technical field [0001] The invention belongs to the field of powder coatings, in particular to a modified fluorocarbon powder coating for aluminum surfaces and a preparation method thereof. Background technique [0002] At present, most fluorocarbon coatings in the market are solvent-based coatings, and their production and coating process will emit a large amount of volatile organic compounds. With the improvement of environmental protection laws and regulations, the environmental protection requirements of coatings are becoming more and more stringent. It is very important to minimize VOC emissions in the production and coating process, but as a solvent-based fluorocarbon coating, no matter how it is improved, there will be varying degrees of VOC emissions. As a VOC-free green and environmentally friendly coating, especially thermosetting fluorocarbon powder coatings, its manufacturing and coating processes are basically similar to ordinary powder coatings, so it will grad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D127/12C09D133/00C09D5/03C09D7/62C09D7/61
CPCC09D5/031C09D5/033C09D127/12C09D133/00
Inventor 魏育福吴严明黄焯轩南仁植蔡劲树刘飞
Owner 广东华江粉末科技有限公司
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