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High temp resistant electrostatic powdered paint and prodn. technique

An electrostatic powder, high temperature resistant technology, applied in the field of powder coatings, can solve the problems of peeling, surface discoloration, loss of object protection and other problems

Inactive Publication Date: 2006-09-20
嘉兴维恩科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the commonly used powder coating is cured at a temperature above 220°C, its surface will change color, fall off, and pulverize, completely losing its protective effect on objects.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] 35 grams of silicone polyester resin, 25 grams of epoxy resin, 2 grams of special curing agent, 1.2 grams of leveling agent, 13 grams of titanium dioxide, 22 grams of barium sulfate, high temperature resistant pigments (high temperature resistant carbon black, high temperature resistant chrome yellow, etc. ) 1.3 grams, benzoin 0.5 grams.

[0011] The production process of the high-temperature-resistant electrostatic powder coating in this embodiment is: according to the above formula, after batching, put it into the mixer for mixing; put the mixed mixture into the extruder to melt, knead and extrude, and the mixing The refining temperature is controlled at 110°C, and the mixing time is controlled at 40 seconds; after the extruded sheet material is cooled, it is put into a pulverizer to be pulverized and ground into a 250-mesh powder, and finally becomes a high-temperature-resistant electrostatic powder coating product, which is packaged and put into storage.

Embodiment 2

[0013] 30 grams of silicone polyester resin, 28 grams of epoxy resin, 3 grams of special curing agent, 1.5 grams of leveling agent, 20 grams of titanium dioxide, 15 grams of barium sulfate, high temperature resistant pigments (high temperature resistant carbon black, high temperature resistant chrome yellow, etc. ) 1.8 grams, benzoin 0.7 grams.

[0014] The production process of the high-temperature-resistant electrostatic powder coating in this embodiment is: according to the above formula, after batching, put it into the mixer for mixing; put the mixed mixture into the extruder to melt, knead and extrude, and the mixing The refining temperature is controlled at 120°C, and the mixing time is controlled at 50 seconds; after the extruded flakes are cooled, they are put into a pulverizer to be pulverized and ground into 140-mesh powder, and finally become a finished high-temperature-resistant electrostatic powder coating, which is packaged and put into storage.

Embodiment 3

[0016] 25 grams of silicone polyester resin, 30 grams of epoxy resin, 4 grams of special curing agent, 1 gram of leveling agent, 20 grams of titanium dioxide, 18 grams of barium sulfate, high temperature resistant pigments (high temperature resistant carbon black, high temperature resistant chrome yellow, etc. ) 1.5 grams, benzoin 0.5 grams.

[0017] The production process of the high-temperature-resistant electrostatic powder coating in this embodiment is: according to the above formula, after batching, put it into the mixer for mixing; put the mixed mixture into the extruder to melt, knead and extrude, and the mixing The refining temperature is controlled at 125°C, and the mixing time is controlled at 40 seconds; after the extruded flakes are cooled, they are put into a pulverizer to be pulverized and ground into 180-mesh powder, and finally become a high-temperature-resistant electrostatic powder coating product, which is packaged and put into storage.

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Abstract

This invention discloses a method for manufacturing a high temperature-resisting electrostatic powder coating, which is composed of organic silicon polyester resin 20-40 wt.%, epoxy resin 20-40 wt.%, specialty curing agent 1-5 wt.%, leveling agent 0.7-1.5 wt.%, titanium dioxide powders 0-25 wt.%, barium sulfate 0-25 wt.%, high temperature-resisting pigments (carbon black, chrome yellow, etc.) 0.1-2 wt.% and benzoin 0.2-0.8 wt.%. The powder coating is manufactured by: mixing the raw materials in a mixer, smelting in an extruder at 100-130 deg.C for 20-70 s, extruding, cooling the extruded sheets, pulverizing and grinding in a pulverizer to obtain high temperature-resisting electrostatic powder coating of 100-350 mesh. After curing of the coating, the coated surface can stand baking at 230-300 deg.C while still retains the previous appearance and physical and chemical properties. The coating can elongate the service life of the coated materials.

Description

technical field [0001] The invention relates to the field of powder coatings, in particular to a special electrostatic powder coating and its production process. Background technique [0002] Powder coating is a kind of solid coating used for anti-corrosion and anti-rust on the surface of materials, which can protect the surface of materials and play a decorative role. It is a solid powder coating that does not contain organic solvents or water. It is sprayed on the surface of the object to be coated in powder form, melted and leveled after baking, and forms a film after curing and adheres to the surface of the object to be coated. The use of powder coatings has the advantages of less environmental pollution, high production efficiency, safe use, and easy to master coating technology. Therefore, it has been widely used in recent years. However, after the commonly used powder coating is cured at a temperature above 220°C, discoloration, peelin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D163/00C09D5/03
Inventor 王凤明
Owner 嘉兴维恩科技股份有限公司
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