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A kind of color plate coil coating composition and preparation method thereof

A coil coating and composition technology, applied in anti-corrosion coatings, polyester coatings, coatings, etc., can solve the problems of color plate performance hardness decrease, mechanical processing performance difficulties, board surface blistering, etc., and achieve excellent bending resistance High performance, high decorative and machinability, fast drying effect

Active Publication Date: 2017-10-24
ZHEJIANG TIANNU GROUP PAINT MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the increase of the line speed, the baking time of the coating is shortened. Taking the color coating line of a large state-owned enterprise as an example, the baking time of the color plate is 23S ~ 25S. Under this production condition, domestic coil coatings suitable for low line speed There will be many problems in the system, such as blisters on the surface of the board, pinholes in the paint film, and surface quality problems such as thick edges; the performance of color boards will also have problems such as hardness decrease and T-bend deterioration.
The performance of the color plate produced on the color coating production line generally requires a hardness of 1H to 2H, and a T-bend of 3T. If the performance declines, it will be difficult to meet the mechanical processing performance of the color plate.

Method used

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  • A kind of color plate coil coating composition and preparation method thereof
  • A kind of color plate coil coating composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0028] In a reactor equipped with a stirrer, a condenser, and a heater, weigh 20 g of isophthalic acid, 4 g of adipic acid, 5 g of 1,4-cyclohexanedicarboxylic acid, 4 g of methylpropanediol, and 6 g of neopentyl dicarboxylic acid. Alcohol, 12g neopentyl glycol monohydroxypivalate, 1g trimethylolpropane, 0.08g dibutyltin dilaurate, 0.07g triphenyl phosphite. After the addition, heat up to 160°C for 1 hour, then heat up to 180°C for 1 hour, then heat up to 200°C and keep warm until the material is transparent, add 2.0g of reflux xylene, and keep warm for esterification at 220-230°C When the measured acid value is lower than 3mgKOH / g, cool down to 200°C and add 2.5g of trimellitic anhydride, then keep warm at 220-230°C for esterification reaction until the measured acid value is lower than 15mgKOH / g, cool down to 200°C, weigh into 25g No. 100 aromatic hydrocarbon solvent and 7g butyl ether are diluted. The obtained modified polyester resin had a solid content of 61.2%, a viscosi...

preparation example 2

[0030] In a reactor equipped with a stirrer, condenser, and heater, weigh 25g of isophthalic acid, 6g of adipic acid, 3g of 1,4-cyclohexanedicarboxylic acid, 6g of methylpropanediol, and 8g of neopentyl dicarboxylic acid. Alcohol, 8g neopentyl glycol monohydroxypivalate, 2g trimethylolpropane, 0.12g dibutyltin dilaurate, 0.04g triphenyl phosphite. After the addition, heat up to 160°C for 1 hour, then heat up to 180°C for 1 hour, then heat up to 200°C and keep warm until the material is transparent, add 2.5g of reflux xylene, and keep warm at 220-230°C for esterification reaction to When the measured acid value is lower than 3mgKOH / g, cool down to 200°C and add 2.0g of trimellitic anhydride, then keep warm at 220-230°C for esterification reaction until the measured acid value is lower than 15mgKOH / g, cool down to 200°C, weigh into 30g No. 100 aromatic hydrocarbon solvent and 5g butyl ether are diluted. The obtained modified polyester resin had a solid content of 61.8%, a visco...

Embodiment 1

[0033]In the dispersion tank, put 500g of the modified polyester resin prepared in Preparation Example 1, 5g of dispersant, 3g of defoamer, and 60g of solvent. After the dispersion is uniform, add 30g of phthalocyanine blue, 80g of titanium dioxide, 90g of Precipitate barium sulfate, disperse evenly at high speed, sand mill until the fineness is less than 25μm, then add 4g leveling agent, 100g amino resin, 6g high-efficiency catalyst, stir evenly, and adjust the viscosity with the remaining 40g solvent.

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Abstract

The invention relates to the field of paint production, in particular to color-coated sheet coil paint technology, and aims to provide a color-coated sheet coil paint composition, capable of meeting the requirements of a high-speed production line of color-coated sheets, curing at low baking temperature and forming a paint film high in hardness and toughness. The color-coated sheet coil paint composition is made from the following components according to parts by weight: 50-70 parts of modified polyester resin, 0.5-1 part of a dispersant, 0.2-0.6 part of a defoaming agent, 5-11 parts of a solvent, 10-30 parts of a pigment, 0-13 parts of a filler, 0.3-0.8 part of a leveling agent, 10-16 parts of amino resin, and 0.5-1 part of an efficient catalyst. When used as color-coated sheet coil paint, this paint composition is effective in improving capacity, saving energy and resources and reducing environmental harm; a paint film has excellent hardness, flexibility, adhesion, scratch resistance and machinability.

Description

technical field [0001] The invention relates to the field of paint production, in particular to the color plate coil paint technology. Background technique [0002] At present, with the increasing consumer demand for color-coated sheets in my country, the application of color-coated sheets has developed rapidly. The design line speed of domestic color coating production lines is mostly between 40-80m / min, and the baking time is about 40S. In order to further expand production capacity, pre-coated coil manufacturers increase the line speed by increasing the temperature, but with the increase of temperature, Energy consumption has also increased significantly; at the same time, due to the accelerated production line speed, the emission of organic waste gas that cannot be fully burned has increased significantly, which wastes energy and pollutes the environment. There are also some enterprises investing in new high-speed color plate production lines. Among them, the line speed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/02C09D161/32C09D5/08C09D7/12C08G63/20C08G63/78
CPCC08G63/20C08G63/78C08L2205/035C09D5/08C09D7/61C09D7/63C09D167/02C08L61/32C08K13/02C08K2003/2241C08K2003/3045C08K5/3467
Inventor 董群锋刘传奇李佳顺牛红让
Owner ZHEJIANG TIANNU GROUP PAINT MFG