Anticorrosive powder coating for outdoor metal guardrails and preparation method thereof

A powder coating and metal technology, applied in powder coatings, anti-corrosion coatings, polyester coatings, etc., can solve the problems that anti-corrosion materials such as glass flakes and stainless steel flakes cannot be applied, affect the decorative effect and service life of the guardrail, and cannot maintain the sheet structure. , to achieve the effect of improving anti-corrosion effect, reducing shrinkage stress and improving microscopic defects

Inactive Publication Date: 2020-01-14
甘肃西部邦奇装饰材料科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

This has seriously affected the decorative effect and service life of the guardrail. It can be seen that improving the penetration resistance of the coating to corrosive media is the most important task.
[0004] At present, there are relatively few outdoor anti-corrosion powder coatings, mainly due to technological problems, usually ideal functional anti-corrosion materials such as glass flakes, mica powder, mica iron oxide and stainless steel flakes are almost impossible to apply
If these materials are directly mixed with resins, pigments, fillers and other components, and produced according to the normal powder making process, then these materials can hardly maintain the original sheet structure in the end, and the anti-corrosion effect will be greatly reduced due to the change of shape.
Therefore, the current powder coating for metal guardrails only plays a decorative and general protective role, and the coating has limited blocking and shielding of corrosive media, that is, the anti-corrosion ability is weak

Method used

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  • Anticorrosive powder coating for outdoor metal guardrails and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: a kind of preparation method of anticorrosion powder coating for outdoor metal guardrail: comprise the following steps:

[0027] Add 47kg of carboxyl-terminated polyester with an acid value of 29, TGIC 3.5kg, rutile titanium dioxide 6kg, precipitated barium sulfate 15kg, benzoin 0.9kg, leveling agent GLP288 0.9kg, brightening agent 701 0.7kg, light stable Add 0.15kg of agent 144, 0.3kg of phthalocyanine blue and 0.8kg of coupling agent w6050, put them into the mixer in turn, mix for 15 minutes at 300 rpm, and stir evenly;

[0028] b. The mixed material is transported to the extruder through the feeder for melt mixing and dispersion extrusion. The temperature of the extruder is controlled at 115-105°C in zone I and 100-90°C in zone II;

[0029] c. The melted and mixed extruded materials are pressed into flake-like and easily crushed materials by the tablet cooling roller, and then crushed into small flake-like materials by the crusher;

[0030] d. After ...

Embodiment 2

[0033] Embodiment 2: preparation method is just that each component weight is with embodiment 1:

[0034] The base powder is composed of the following components in parts by weight:

[0035] 46kg of carboxyl-terminated polyester with an acid value of 25, TGIC 3.4kg, rutile titanium dioxide 6kg, precipitated barium sulfate 12kg, benzoin 0.9kg, leveling agent GLP288 0.9kg, brightening agent 701 0.7kg, light stabilizer 144 0.15kg, pigment phthalocyanine blue 0.2kg and coupling agent w6050 0.8kg.

[0036] The components of the raw materials are by weight: 0.4kg of bonding wax powder, 4kg of glass flakes, and 0.1kg of alumina C.

Embodiment 3

[0037] Embodiment 3: preparation method is just that each component weight is with embodiment 1:

[0038] The base powder is composed of the following components in parts by weight:

[0039] Carboxy-terminated polyester with an acid value of 30 45kg, TGIC 3.3kg, rutile titanium dioxide 6kg, precipitated barium sulfate 12kg, benzoin 0.9kg, leveling agent GLP288 0.9kg, brightening agent 701 0.7kg, light stabilizer 144 0.15kg, phthalocyanine blue 0.2kg and coupling agent w6050 0.8kg.

[0040] The components of the raw materials are by weight: 0.4kg of bonding wax powder, 4kg of glass flakes, and 0.1kg of alumina C.

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Abstract

The invention relates to an anticorrosive powder coating for outdoor metal guardrails and a preparation method thereof. The anticorrosive powder coating is prepared by mixing base powder and raw materials according to a certain ratio in a bonding machine and then performing sieving. The base powder comprises the following components in parts by weight: 40-60 parts of carboxyl-terminated polyester,3-5 parts of a curing agent, 5-10 parts of titanium dioxide, 5-15 parts of precipitated barium sulfate, 0-2 parts of an antifoaming agent, 0.6-1.3 parts of a leveling agent, 0.5-1.2 parts of a glossenhancer, 0.05-0.2 part of a light stabilizer, 0-1 part of a pigment and 0.2-1 part of a coupling agent. The raw materials are composed of the following components in parts by weight: 0.1-0.5 part ofbonding wax powder, 3-8 parts of glass flakes and 0.05-0.1 part of aluminum oxide C. Corresponding film-forming components and functional fillers are selected, so the weather resistance and the anti-corrosion effect of a coating film are remarkably improved, the substrates of the guardrails are effectively protected, and the service life of the substrates of the guardrails is prolonged.

Description

technical field [0001] The invention belongs to the field of powder coatings, in particular to an anti-corrosion powder coating for outdoor metal guardrails and a preparation method thereof. Background technique [0002] Metal guardrails are used for personnel safety protection in municipal administration, transportation, highways and buildings. Due to long-term exposure to wind, rain and sun in the outdoor environment, they are prone to rust. Severe corrosion directly destroys the overall structure of the guardrail, which not only brings Economic losses, sometimes even endanger personal safety, but also not conducive to the protection of natural resources and the environment. Among all anti-corrosion measures, organic coatings are still the most effective, economical and widely used so far. There are two important factors that cause the aging of outdoor organic coatings. One is the molecular chain scission of organic polymers caused by photodegradation, which causes direct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D5/08C09D5/03C09D7/61C09D7/65
CPCC08K2003/2227C08K2003/2241C08K2003/3045C09D5/033C09D5/08C09D167/00C08L91/06C08K13/04C08K3/22C08K3/30C08K7/00C08K3/40
Inventor 陈玉滨张小兵魏广涛张博
Owner 甘肃西部邦奇装饰材料科技有限公司
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