Powder coating for automotive topcoat

A technology for powder coatings and automotive topcoats, used in powder coatings, polyester coatings, epoxy resin coatings, etc.

Active Publication Date: 2013-09-11
宁波派特勒新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the existing pure polyester powder coatings, the strength of this technical solution has been greatly improved, but it still cannot reach the foreign indicators for such coatings used in car topcoats.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] The preparation method of above-mentioned powder coating, comprises the following steps,

[0017] 1) By weight percentage, 3%-5% hydroxyl acrylic resin, 0.8%-2% epoxy resin, 12.5%-14.5% polyether ester, 45%-50% polyester resin, 0.3% -0.6% dibutyltin dilaurate, 0.4%-0.6% benzoin, 2%-2.2% leveling agent, 22.5%-25.5% titanium dioxide and 8%-12% ε-caprolactam blocked isofor Alone diisocyanate is used for batching;

[0018] 2) Put polyether ester, polyester resin, dibutyltin dilaurate, benzoin, leveling agent, titanium dioxide and ε-caprolactam blocked isophorone diisocyanate into the mixer and mix for 15-20 minutes Obtain compound A; Mix hydroxyacrylic resin and epoxy resin for 10-13 minutes to obtain compound B;

[0019] 3) Use a twin-screw extruder to extrude compound A at the front end at 75°C-85°C, raise the temperature of the extruder to 110°C-120°C in the middle section, then add compound B, and extrude it. Powder coating is obtained after pulverization.

[0020] ...

Embodiment 1

[0028] A kind of powder coating for automobile finish, by weight percentage, 3% hydroxyl acrylic resin, 1.0% bisphenol A epoxy resin, 12.5% ​​polyether ester, 50% unsaturated polyester resin, 0.5% bisphenol A Dibutyltin laurate, 0.5% benzoin, 2.0% leveling agent, 22.5% titanium dioxide and 8% ε-caprolactam blocked isophorone diisocyanate.

Embodiment 2

[0030] A kind of powder coating for automobile finish, by weight percentage, 5% hydroxyl acrylic resin, 1.5% bisphenol A epoxy resin, 12.5% ​​polyether ester, 45% unsaturated polyester resin, 0.6% di Dibutyltin laurate, 0.6% benzoin, 2.1% leveling agent, 22.5% titanium dioxide and 10.2% ε-caprolactam blocked isophorone diisocyanate.

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PUM

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Abstract

The invention relates to a powder coating for automotive topcoat. The powder coating comprises the following components by weight percent: 3-5% of hydroxy acrylic resin, 0.8-2% of epoxy resin, 12.5-14.5% of polyether ester, 45-50% of polyester resin, 0.3-0.6% of dibutyltin dilaurate, 0.4-0.6% of benzoin, 2-2.2% of a levelling agent, 22.5-25.5% of titanium dioxide and 8-12% of epsilon-caprolactam blocked isophorone diisocyanate. The softness is well maintained while the strength of the powder coating is improved and the weatherability of the powder coating is improved to some extent.

Description

technical field [0001] The invention belongs to the field of powder coatings, in particular to a powder coating used for automotive topcoats. Background technique [0002] Powder coating is a new type of solvent-free 100% solid powder coating. The powder coating currently used is mixed with special resins, pigments, fillers, curing agents and other additives in a certain proportion, and then squeezed, crushed prepared by other processes. Powder coating has the advantages of easy storage at room temperature, high utilization rate and easy construction. Since its inception, it has gained wide recognition and developed rapidly. [0003] The current powder coatings are basically divided into pure epoxy powder coatings, epoxy-polyester hybrid powder coatings, pure polyester powder coatings and acrylic powder coatings. Among them, pure epoxy powder coatings and epoxy-polyester hybrid powder coatings are not suitable for outdoor use due to their poor weather resistance; acrylic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D175/06C09D175/08C09D163/02C09D133/00C09D7/12C09D5/03
Inventor 程红华徐明祝智
Owner 宁波派特勒新材料股份有限公司
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