Low-temperature curing type epoxy group acrylic acid transparent powder coating and preparation method thereof

A technology of epoxy-based acrylic and powder coatings, applied in powder coatings, coatings, etc., can solve the problems of poor transparency, no introduction of weather resistance and corrosion resistance, no introduction of acrylic resin epoxy equivalent, etc., to achieve increased results Density, solution to yellowing, good anti-copper acceleration effect

Active Publication Date: 2016-01-27
GUANGZHOU KINTE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The patent "epoxy functional acrylic powder and powder coating made from it" issued by A. T. Daly and S. Mollett-Limberger of the United States, patent application number: 200810108733.1, although this patent also uses ring Oxygen-functional acrylic resin, but the specific epoxy equivalent of the acrylic resin used is not given in this patent, and it is cured at a higher temperature (170-180°C), which belongs to high-temperature curing, not low-temperature curing (150-160°C) , did not introduce the solution of weather resistance and corrosion resistance under low temperature curing. In addition, the patent uses an acrylate copolymer flow modifier as a leveling agent. The leveling agent is a leveling agent used in conventional non-transparent powders. Transparency poor

Method used

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  • Low-temperature curing type epoxy group acrylic acid transparent powder coating and preparation method thereof
  • Low-temperature curing type epoxy group acrylic acid transparent powder coating and preparation method thereof
  • Low-temperature curing type epoxy group acrylic acid transparent powder coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0051] A low-temperature curing type epoxy acrylic transparent powder coating, the low temperature curing type epoxy acrylic transparent powder coating of this embodiment, its component and weight ratio are:

[0052]

[0053] in,

[0054] The high epoxy equivalent acrylic resin modified by ultrafine titanium dioxide has an epoxy equivalent of 500 to 700 g / eq, which is obtained by modifying the high epoxy equivalent acrylic resin with ultrafine titanium dioxide modified by KH-550 silane coupling agent , the preparation method is as follows:

[0055] (1) Preparation of modified ultrafine titanium dioxide: Weigh 1 part of ultrafine titanium dioxide (particle size 100-300nm), add 20 parts of isopropanol, and use an ultrasonic instrument at room temperature for 30 minutes to obtain a uniform suspension, then add 0.02 parts The coupling agent was ultrasonicated for 3 minutes, then stirred at a constant temperature of 90°C for 3 minutes, and then centrifuged to obtain KH-550 modi...

Embodiment 2

[0069] A low-temperature curing type epoxy acrylic transparent powder coating, the low temperature curing type epoxy acrylic transparent powder coating of this embodiment, its component and weight ratio are:

[0070]

[0071] in,

[0072] The high epoxy equivalent acrylic resin modified by ultrafine titanium dioxide has an epoxy equivalent of 500 to 700 g / eq, which is obtained by modifying the high epoxy equivalent acrylic resin with ultrafine titanium dioxide modified by KH-550 silane coupling agent , the preparation method is as follows:

[0073] (1) Preparation of modified ultrafine titanium dioxide: Weigh 1 part of ultrafine titanium dioxide (particle size 100-300nm), add 20 parts of isopropanol, and use an ultrasonic instrument at room temperature for 30 minutes to obtain a uniform suspension, then add 0.04 parts The coupling agent was ultrasonicated for 3 minutes, then stirred at a constant temperature of 80°C for 3 minutes, and then centrifuged to obtain KH-550 modi...

Embodiment 3

[0085] A low-temperature curing type epoxy acrylic transparent powder coating, the low temperature curing type epoxy acrylic transparent powder coating of this embodiment, its component and weight ratio are:

[0086]

[0087] in,

[0088] The high epoxy equivalent acrylic resin modified by ultrafine titanium dioxide has an epoxy equivalent of 500 to 700 g / eq, which is obtained by modifying the high epoxy equivalent acrylic resin with ultrafine titanium dioxide modified by KH-570 silane coupling agent , the preparation method is as follows:

[0089] (1) Preparation of modified ultrafine titanium dioxide: Weigh 1 part of ultrafine titanium dioxide (particle size 100-600nm), add 20 parts of isopropanol, and use an ultrasonic instrument at room temperature for 30 minutes to obtain a uniform suspension, then add 0.04 parts The coupling agent was ultrasonicated for 3 minutes, then stirred at a constant temperature of 80°C for 4 minutes, and then centrifuged to obtain KH-570 modi...

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Abstract

The invention discloses a low-temperature curing type epoxy group acrylic acid transparent powder coating. The low-temperature curing type epoxy group acrylic acid transparent powder coating is mainly prepared from high-epoxide-equivalent acrylic resin, low-epoxide-equivalent acrylic resin, dodecanedioic acid, an ultraviolet light absorber, a light stabilizer, a flatting agent and other auxiliaries. The high-epoxide-equivalent acrylic resin is modified by ultrafine titanium dioxide, and the low-epoxide-equivalent acrylic resin is in a GMA type. By the adoption of the high-epoxide-equivalent acrylic resin, the low-epoxide-equivalent acrylic resin and the dodecanedioic acid, the initial reaction temperature of the powder coating is decreased, and low-temperature curing is achieved; due to the auxiliary curing of the low-epoxide-equivalent acrylic resin, the enough compactness of the powder coating is improved, and then the corrosion resistance of the coating is improved; by the adoption of the high-epoxide-equivalent acrylic resin modified by the ultrafine titanium dioxide, the best ultraviolet absorption effect is obtained, and the weather resistance of the coating is improved.

Description

technical field [0001] The invention relates to the technical field of powder coatings, in particular to a low-temperature curing epoxy-based acrylic transparent powder coating and a preparation method thereof. Background technique [0002] With the continuous advancement of technology, a new spraying process has appeared in the coating of automotive aluminum wheels. This process is composed of two layers of base powder and transparent powder. The base powder is mainly pure polyester with excellent leveling properties. Powder coating, clear powder is acrylic transparent powder coating. [0003] At present, low-temperature-cured base powder for aluminum wheels has been used in large quantities on the market, but there is no related product for low-temperature-cured varnish transparent powder. [0004] Generally, the curing temperature of conventional varnish powder coatings is 175-200 °C, the baking temperature is high, and the energy consumption is high in practical applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/14C09D7/12C09D5/03C08F220/32C08F220/14C08F220/18C08F212/08C08L33/14C08K3/22C08K9/06
Inventor 李光丁振刚高庆福
Owner GUANGZHOU KINTE IND
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