Anti-doodling polyurethane powder paint, preparation method and application thereof

A polyurethane powder and anti-graffiti technology, applied in the field of coatings, can solve the problems of strong pollution of silicone resin, insufficient surface hardness, and easy damage of the surface, and achieve good anti-graffiti effect, convenient operation, and short production cycle.

Inactive Publication Date: 2020-01-10
HUNAN LIANXIN SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface hardness of the polyester/TGIC system is not enough. After repeated wiping, the surface is easily damaged. After the surface is damaged, stains a

Method used

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  • Anti-doodling polyurethane powder paint, preparation method and application thereof
  • Anti-doodling polyurethane powder paint, preparation method and application thereof
  • Anti-doodling polyurethane powder paint, preparation method and application thereof

Examples

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Example Embodiment

[0028] Example 1:

[0029] A polyurethane powder coating of the present invention, its raw material includes the following components:

[0030]

[0031] Among them, the high-hydroxyl-terminated polyester resin has a hydroxyl value of 280-320, and the low-hydroxyl-terminated polyester resin has a hydroxyl value of 35-45.

[0032] The preparation method of the polyurethane powder coating of this embodiment includes the following steps:

[0033] (1) After pre-mixing the components of the polyurethane powder coating in proportions, a mixture is obtained;

[0034] (2) The mixture material obtained in the step (1) is subjected to melt extrusion (90°C in the front area of ​​the screw, 105°C in the rear area of ​​the screw), tableting (the thickness of the tablet is about 1mm), crushing, and crushing through 180 mesh Sieve to obtain the polyurethane powder coating.

[0035] After testing, the particle size distribution of polyurethane powder coating is 5μm-100μm, and D50 is 32μm-35μm.

[0036] T...

Example Embodiment

[0040] Example 2:

[0041] A polyurethane powder coating of the present invention, its raw material includes the following components:

[0042]

[0043]

[0044] Among them, the high-hydroxyl-terminated polyester resin has a hydroxyl value of 280-320, and the low-hydroxyl-terminated polyester resin has a hydroxyl value of 35-45.

[0045] The preparation method of the polyurethane powder coating of this embodiment includes the following steps:

[0046] (1) After pre-mixing the components of the polyurethane powder coating in proportions, a mixture is obtained;

[0047] (2) The mixture material obtained in the step (1) is subjected to melt extrusion (90°C in the front area of ​​the screw, 105°C in the rear area of ​​the screw), tableting (the thickness of the tablet is about 1mm), crushing, and crushing through 180 mesh Sieve to obtain the polyurethane powder coating.

[0048] After testing, the particle size distribution of polyurethane powder coating is 5μm-100μm, and D50 is 32μm-35μm. ...

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Abstract

The invention discloses an anti-doodling polyurethane powder paint, which comprises the following raw materials by mass: 400-500 parts of hydroxyl-terminated polyester resin, 200-250 parts of closed polyisocyanate, 40-60 parts of polyvinylidene fluoride, 120-150 parts of rutile titanium dioxide, 60-70 parts of barium sulfate, 8-10 parts of a leveling agent, 8-10 parts of a wetting accelerator, 3-5parts of benzoin, 1 part of pigment carbon black, 0.5 part of phthalocyanine blue and 2 parts of iron oxide yellow. After the powder paint is coated to form a film, the surface hardness is high (up to 4H), the surface is hardly damaged in the repeated wiping process, and also has the characteristics of hydrophobicity, oleophobicity, strong anti-fouling ability, easy cleaning and good anti-doodling effect. The invention also discloses a preparation method characterized by convenient operation, low cost and short making period, and application of spraying the polyurethane powder paint to a metal surface and performing curing into a film by high-temperature baking.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to an anti-graffiti polyurethane powder coating and a preparation method and application thereof. Background technique [0002] At present, most of the anti-graffiti powder coatings use the introduction of silicone resin into the polyester / TGIC formula system, and use the hydrophobic and oleophobic properties of the silicone resin to achieve the effect of anti-graffiti. However, the surface hardness of the polyester / TGIC system is not enough. After repeated wiping, the surface is easily damaged. After the surface is damaged, stains and dust enter the micro-gap of the surface, making it difficult to clean. Silicone resin is very polluting to other materials. It is difficult to control during the production process. Therefore, there is an urgent need for an anti-graffiti powder coating with high surface hardness and the surface is difficult to be destroyed during repeated wiping, and a prepar...

Claims

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Application Information

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IPC IPC(8): C09D175/06C09D127/16C09D5/16C09D5/03C09D7/61
CPCC08K2003/2241C08K2003/3045C08L2205/04C09D5/033C09D5/1662C09D5/1687C09D175/06C08L27/16C08K13/02C08K3/22C08K3/30
Inventor 夏连心朱满子
Owner HUNAN LIANXIN SCI & TECH CO LTD
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