Powder paint and production method and application thereof

A technology of powder coatings and raw materials, applied in powder coatings, anti-corrosion coatings, polyester coatings, etc., can solve the problems affecting the promotion and application of HAA-curable powder coatings, eye irritation and allergy, animal cell mutagenesis, etc.

Inactive Publication Date: 2019-07-09
SHENZHEN WAVE TELECOMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TGIC curing agent is irritating and allergic to human skin and eyes, and can cause mutagenesis in animal cells. It is restricted by many countries in Europe and the United States and labeled as toxic
HAA curing agent is the best substitute for TGIC curing agent. It has the characteristics of non-toxicity, non-irritation, stable storage, fast curing speed and low curing temperature, but the powder coating prepared by HAA curing agent is used for coating. , the corrosion resistance of the coating is poor, which affects the promotion and application of HAA curable powder coatings

Method used

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  • Powder paint and production method and application thereof
  • Powder paint and production method and application thereof
  • Powder paint and production method and application thereof

Examples

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preparation example Construction

[0044] see figure 1 , the preparation method of the powder coating of an embodiment, comprises the following steps:

[0045] Step S110: Weigh raw materials according to the following parts by mass: 50-60 parts of polyester resin, 3-7 parts of HAA curing agent, 30.1-50.1 parts of pigments and fillers and additives, the acid value of polyester resin is 29 mg KOH / g~35mg KOH / g, additives include: 0.2-1.0 parts of leveling agent, 0.1-0.8 parts of benzoin, 0.1-0.8 parts of defoamer and 1.1-2.3 parts of fumed silica.

[0046] Among them, the softening point of the polyester resin is 100°C to 110°C. The viscosity of polyester resin is 4500mpa.s~5500mpa.s (200°C). The HAA curing agent is N, N, N', N'-tetra(β-hydroxypropyl) adipamide. The hydroxyl equivalent of the HAA curing agent is 90g / eq-100g / eq.

[0047] Pigments and fillers include pigments and fillers. Specifically, in parts by mass, the pigment includes 10-16 parts of titanium dioxide. Fillers include barium sulfate and q...

Embodiment 1

[0071] The preparation process of the powder coating of the present embodiment is as follows:

[0072] (1) In parts by mass, weigh the following raw materials: 50 parts of polyester resin, 3 parts of HAA curing agent, 10 parts of titanium dioxide, 12 parts of barium sulfate, 8 parts of quartz powder, 0.2 parts of leveling agent, defoamer 0.1 part, 0.1 part of benzoin, 0.1 part of 2-methylimidazole, 1.2 parts of fumed silica, 0.06 part of carbon black, 0.02 part of phthalocyanine green, 0.02 part of phthalocyanine blue and 0.2 part of embossing agent. Among them, the acid value of the polyester resin is 29 mg KOH / g to 35 mg KOH / g. The softening point is 100°C. The viscosity is 5000mpa.s (200°C). The hydroxyl equivalent of the HAA curing agent is 100g / eq. The leveling agent is PV88 from Dexinli Chemical Company. The defoamer is YPZ from Hubei Laisi Chemical New Material Co., Ltd.

[0073] (2) Mix 50 parts of polyester resin, 3 parts of HAA curing agent, 10 parts of titanium...

Embodiment 2

[0078] The preparation process of the powder coating of the present embodiment is as follows:

[0079] (1) In parts by mass, weigh the following raw materials: 55 parts of polyester resin, 5 parts of HAA curing agent, 13 parts of titanium dioxide, 16 parts of barium sulfate, 11 parts of quartz powder, 0.6 parts of leveling agent, defoamer 0.5 parts, 0.5 parts of benzoin, 0.2 parts of 2-methylimidazole, 1.7 parts of fumed silica, 0.06 parts of carbon black, 0.02 parts of phthalocyanine green, 0.02 parts of phthalocyanine blue and 0.3 parts of embossing agent. Among them, the acid value of the polyester resin is 29 mg KOH / g to 35 mg KOH / g. The softening point is 110°C. The viscosity is 5500mpa.s (200°C). The hydroxyl equivalent of the HAA curing agent is 95g / eq. The leveling agent is P67 from Dexinli Chemical Company. The defoamer is F-2572 from Guangdong Tianfeng Defoamer Co., Ltd.

[0080] (2) 55 parts of polyester resin, 5 parts of HAA curing agent, 13 parts of titanium ...

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Abstract

The invention relates to powder paint and a production method and application thereof. Raw materials for producing the powder paint comprise, in parts by mass, 50-60 parts of polyester resin, 3-7 parts of an HAA curing agent, 30.1-50.1 parts of pigment and filler and assistants, wherein an acid value of the polyester resin is 29-35 mg OKH / g, and the assistants comprise 0.2-1.0 part of a flatting agent, 0.1-0.8 part of benzoin, 0.1-0.8 part of a defoaming agent and 1.1-2.3 parts of fumed silica. During use of the powder paint, when an obtained coating is thick, the phenomena of shrinkage and pin-holes are avoided, and a natural salt spray test reaches 1000 h or longer, so that the corrosion resistance is good.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a powder coating and its preparation method and application. Background technique [0002] Due to its advantages of no volatile organic compounds (VOCs), simple process, and reasonable price, powder coatings are gradually replacing solvent-based anti-corrosion coatings, and are widely used in metal surface treatment such as outdoor filters, road guardrails, and lamp posts. [0003] There are two main types of polyester powder coatings for outdoor use, namely TGIC (triglycidyl isocyanate) curing powder coatings and HAA (hydroxyalkylamide) curing powder coatings. The three epoxy groups of TGIC curing agent have high activity and high crosslinking density, which makes the coating have good weather resistance, heat resistance and hardness. However, TGIC curing agent is irritating and allergic to human skin and eyes, and can cause mutagenesis in animal cells. It is restricted in use by many E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D5/03C09D7/61C09D7/63C09D5/08
CPCC08K2003/3045C09D5/033C09D5/08C09D167/00C08K3/36C08K3/30C08K5/07
Inventor 张少林麦建林周江山彭路希李志鹏歹利宾
Owner SHENZHEN WAVE TELECOMM TECH CO LTD
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