Long-acting weather-resistant chlorine salt corrosion-resistant polyester powder coating and preparation method thereof

A technology of polyester powder and powder coating, which is applied in the direction of powder coating, polyester coating, anti-corrosion coating, etc. It can solve the problems of guardrails, bridges, low cross-linking density, poor water resistance and resistance to inorganic salt penetration, etc. Achieve excellent low temperature flow properties, good linear structure and high curing activity

Active Publication Date: 2020-12-08
安徽鑫友高分子新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the low cross-linking density of the above-mentioned powder coatings, the poor ability of water resistance and inorganic salt penetration resistance, the purpose of improving the above-mentioned weather resistance is mainly achieved through the cooperation between the aging resistance

Method used

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  • Long-acting weather-resistant chlorine salt corrosion-resistant polyester powder coating and preparation method thereof
  • Long-acting weather-resistant chlorine salt corrosion-resistant polyester powder coating and preparation method thereof
  • Long-acting weather-resistant chlorine salt corrosion-resistant polyester powder coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The preparation method of long-acting weather resistance, anti-chlorine salt corrosion type polyester powder coating comprises the following steps:

[0055] S1: Add the formulated amount of TGIC and trimesic acid triglycidyl ester into the reaction kettle, and gradually heat it to 107°C. After the materials are completely melted, stir and let them mix and react for 30 minutes, discharge while hot, cool, and crush into 60 Obtain modified curing agent powder;

[0056] S2: Weigh the modified curing agent powder obtained in S1 and the polyester resin of the formula amount into the high-speed mixer, start the mixing device, and mix at a high speed for about 20 minutes;

[0057] S3: After the main raw materials in S2 are mixed evenly, put them into a twin-screw extruder for melt extrusion, the temperature of the extrusion section is about 125°C, and the screw speed is 545rpm; then cooled and crushed into 4mm particles to obtain a primary extruded material ;

[0058] S4: Add...

Embodiment 5

[0079] Coating coating preparation: Spray the prepared powder coating on the surface-treated tinplate substrate with an electrostatic spray gun, with a film thickness of about 120 μm, and fully cure at 160°C / 20min to obtain the coating coating.

[0080] Coating index detection is based on GB / T 21776-2008 "Guidelines for Testing Standards for Powder Coatings and Coatings"; weather resistance test is based on GB / T 1865-2009 "Paints and Varnishes Artificial Weathering and Artificial Radiation Exposure Filtered Xenon Arc Radiation" in Table 4 A specified step program continuous artificial weathering test 700h. Adhesion grade is based on GB / T9286-1998 "Cross-cut test of paint and varnish film"; chlorine salt corrosion resistance adopts soaking method. , the surface is gently rinsed with running water, and the surface of the coating film is observed for discoloration, blistering, cracking, and peeling off; the salt spray test is carried out according to GB / 1771-2007 "Determination o...

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Abstract

The invention belongs to the technical field of preparation of polyester powder coatings, and particularly relates to a long-acting weather-resistant chlorine salt corrosion-resistant polyester powdercoating and a preparation method thereof. The powder coating comprises the following main raw materials in parts by weight: 530-560 parts of polyester resin, 45-60 parts of TGIC, 10-15 parts of triglycidyl trimellitate, 120-180 parts of titanium dioxide, 80-120 parts of barium sulfate, 8-12 parts of a brightening agent and 7-10 parts of leveling agent. The polyester resin used in the powder coating is good in linear structure, and excellent flowing performance is guaranteed; more trifunctional curing agents TGIC are used in the powder coating and matched with triglycidyl trimellitate with a low melting point and excellent water resistance to jointly serve as a low-temperature curing agent, the crosslinking density and water resistance of a coating film are further improved, and finally long-acting weather resistance and chlorine salt corrosion resistance are guaranteed. The final powder coating product can be used for low-temperature curing at 160 DEG C, and the prepared coating filmhas excellent long-acting weather resistance and chlorine salt corrosion resistance, and is especially suitable for infrastructure spraying of expressways, such as guardrails and bridges.

Description

technical field [0001] The invention belongs to the technical field of polyester powder coating preparation, and in particular relates to a long-acting weather-resistant, chlorine-salt corrosion-resistant polyester powder coating and a preparation method. Background technique [0002] Powder coatings are more and more widely used because they do not contain organic solvents and are 100% solid components. Compared with conventional coatings, they have the advantages of no pollution, energy and resource saving, high mechanical strength of the coating film, and full recovery of excess coatings. It is used in the coating of building shells such as household appliances, automobile industry, outdoor bridges, highway guardrails, etc. [0003] In winter, in order to prevent freezing and ensure the smooth flow of highways, it is necessary to spread a large amount of deicing agents. At present, the main varieties of deicing agents at home and abroad are chloride-salt products, such as...

Claims

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Application Information

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IPC IPC(8): C09D167/02C09D5/03C09D5/08C09D7/61C09D7/63C08G63/682
CPCC08G63/6826C08K2003/2241C08K2003/3045C09D5/033C09D5/08C09D167/02C08K13/02C08K5/34924C08K5/1515C08K3/30C08K3/22
Inventor 陈君徐友楼鲍文鑫吴有军
Owner 安徽鑫友高分子新材料科技有限公司
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