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Powder coating material for metal corrosion prevention, preparation method and application method thereof

A powder coating and metal anti-corrosion technology, applied in powder coatings, anti-corrosion coatings, polyester coatings, etc., can solve problems such as poor layer compactness, and achieve the effects of high compactness, improved service life, and excellent adhesion performance.

Inactive Publication Date: 2020-10-20
HUNAN LIANXIN SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing powder coatings are used to protect metals from corrosion, but after the existing powder coatings are sprayed, due to the poor density of the coating, oxygen and water vapor in the air can still contact the metal through the micropores and oxidize the metal.

Method used

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  • Powder coating material for metal corrosion prevention, preparation method and application method thereof
  • Powder coating material for metal corrosion prevention, preparation method and application method thereof
  • Powder coating material for metal corrosion prevention, preparation method and application method thereof

Examples

Experimental program
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preparation example Construction

[0035] A method for preparing a powder coating for metal anticorrosion, the method comprising:

[0036] Grinding the unsaturated polyester resin and bisphenol A epoxy resin to 100-200 mesh to obtain a mixed resin;

[0037] Add graphene powder, curing agent, leveling agent, benzoin and mixed resin into a high-speed mixer, mix at a temperature of 40-60°C and a speed of 500-800r / min for 10-20min to obtain a mixture;

[0038] Add the mixture to a twin-screw extruder with a rotating speed of 200-300r / min, the temperature of the extruder cavity is 100-120°C, the temperature of the outlet is 115-125°C, and melt extrusion;

[0039] After the molten material is cooled, it is crushed to 250-300 mesh to obtain a powder coating.

[0040] A method of applying a powder coating for metal corrosion protection by:

[0041] Pass the powder coating through a 200-300 mesh sieve;

[0042] Spray the powder paint on the surface-treated metal plate with an electrostatic spray gun, the paint film t...

specific Embodiment 1

[0044] A kind of powder coating that is used for metal anticorrosion, raw material comprises by weight component:

[0045]

[0046] Unsaturated polyester resin is polymerized by styrene, acrylate and vinyl acetate; the molecular weight of bisphenol A epoxy resin is 4000-5000; the particle size of graphene powder is 600 mesh; the curing agent is a tertiary amine curing agent ; The leveling agent is polydimethylsiloxane.

[0047] A method for preparing a powder coating for metal anticorrosion, the method comprising:

[0048] Pulverizing the unsaturated polyester resin and the bisphenol A epoxy resin to 100 mesh to obtain a mixed resin;

[0049] Add graphene powder, curing agent, leveling agent, benzoin and mixed resin into a high-speed mixer, mix at a temperature of 40°C and a speed of 800r / min for 20min to obtain a mixture;

[0050] Add the mixture to a twin-screw extruder with a rotating speed of 200r / min, the temperature of the extruder cavity is 100°C, the temperature o...

specific Embodiment 2

[0056] A kind of powder coating that is used for metal anticorrosion, raw material comprises by weight component:

[0057]

[0058] Unsaturated polyester resin is polymerized by styrene, acrylate and vinyl acetate; the molecular weight of bisphenol A epoxy resin is 5000-6000; the particle size of graphene powder is 400 mesh; the curing agent is imidazole curing agent; The leveling agent is polyether polyester modified organosiloxane.

[0059] A method for preparing a powder coating for metal anticorrosion, the method comprising:

[0060] Pulverizing the unsaturated polyester resin and the bisphenol A epoxy resin to 200 mesh to obtain a mixed resin;

[0061] Add graphene powder, curing agent, leveling agent, benzoin and mixed resin into a high-speed mixer, mix at a temperature of 60°C and a speed of 500r / min for 10 minutes to obtain a mixture;

[0062] Add the mixture to a twin-screw extruder with a rotation speed of 300r / min, the temperature of the extruder cavity is 120°...

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Abstract

The invention discloses a powder coating material for metal corrosion prevention, a preparation method and an application method of the powder coating material. The powder coating material is preparedfrom the following raw materials in parts by weight: 30 to 45 parts of unsaturated polyester resin, 25 to 35 parts of bisphenol A epoxy resin, 3 to 8 parts of graphene powder, 12 to 18 parts of a curing agent, 3 to 6 parts of a leveling agent and 0.5 to 0.9 part of benzoin. The powder coating material is applied to a metal plate, a compact coating layer is formed after the powder coating materialis cured, the compactness is high, the permeation resistance is high, corrosion prevention can be conducted on metal, the service life of the metal is greatly prolonged, the adhesive property is excellent, and the impact resistance is good.

Description

technical field [0001] The invention relates to the technical field of powder coatings, in particular to a powder coating for metal anticorrosion, a preparation method and an application method thereof. Background technique [0002] Powder coating is a rapidly developing field in the whole coating technology. Because its VOC emission is almost zero, environmental protection requirements have driven its rapid development. Global and Chinese environmental laws and regulations are becoming more and more stringent, effectively promoting the development of the environmentally friendly powder coating industry. [0003] Metal exposed to the air for a long time, in contact with oxygen and water vapor, will quickly oxidize, that is, rust, its strength and other aspects of performance will be greatly reduced, such as: metal iron. Existing powder coatings are used to protect metals from corrosion, but after the existing powder coatings are sprayed, due to the poor density of the coat...

Claims

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Application Information

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IPC IPC(8): C09D167/06C09D125/14C09D163/00C09D5/08C09D5/03C09D7/61B05D7/14B05D7/24B05D1/06
CPCB05D1/06B05D7/14B05D7/24B05D2504/00B05D2508/00C08L2205/03C09D5/033C09D5/08C09D125/14C09D163/00C09D167/06C08L67/06C08L25/14C08K3/042C08L63/00
Inventor 夏连心方志望朱满子李时雨
Owner HUNAN LIANXIN SCI & TECH CO LTD
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