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Low-temperature curing high-leveling low-gloss powder coating for auto parts and preparation method thereof

A technology for powder coatings and auto parts, applied in powder coatings, polyester coatings, anti-corrosion coatings, etc., can solve the problems of fast powder reactivity, failure to achieve ultra-high leveling mirror effect, poor heat resistance, etc.

Active Publication Date: 2021-05-04
GUANGZHOU KINTE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Generally, the curing temperature of powder coating is 180-200°C, but at present, the aluminum alloy wheels for mid-to-high-end cars are made by low-temperature casting process. The mechanical properties will be lost during baking, resulting in a decrease in the toughness of the aluminum wheel hub, causing potential safety hazards; the powder coating is cured at a temperature range of 150-160 °C, which can not only retain the mechanical properties of the aluminum wheel hub, but also save energy consumption and reduce carbon dioxide emissions
[0003] At present, the powder coating products of low-temperature curing for automobile aluminum wheels exist and are used, but most of these products are high-gloss types, such as: CN104449268A A kind of low-temperature-curing special primer powder coating for automobile aluminum wheels and its preparation method, because large Most matting agents have poor matting effect when cured at low temperature, and cannot achieve high leveling and low light effect powder coatings; although a few powder coatings can achieve matting effect while curing at low temperature by adding traditional catalysts, but due to the fact that the powder is curing The reaction is too fast in the process and it is difficult to ensure the leveling performance, so it is not suitable for use in the field of automotive aluminum wheels
[0004] The existing low-temperature curing low-gloss powder coatings have not been studied on leveling, or although they have high leveling properties, they cannot achieve ultra-high leveling mirror effects, so they cannot be used in automotive parts that require high leveling effects. Field applications, for example: CN106752765A a kind of toughened modified low-temperature curing low-gloss powder coating and its preparation method; CN101747826A a kind of low-temperature curing epoxy low-gloss powder coating and its preparation method; CN1478836 a kind of thermosetting low-temperature curing weather-resistant low-gloss powder coating

Method used

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  • Low-temperature curing high-leveling low-gloss powder coating for auto parts and preparation method thereof
  • Low-temperature curing high-leveling low-gloss powder coating for auto parts and preparation method thereof
  • Low-temperature curing high-leveling low-gloss powder coating for auto parts and preparation method thereof

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preparation example Construction

[0066] Wherein, the modified nano silicon dioxide in embodiment 1 is prepared by the following method:

[0067] Weigh 1 part of R812, add 25 parts of isopropanol, and use an ultrasonic instrument to sonicate at room temperature for 15 minutes to obtain a uniform suspension, then add 0.03 part of KH-550, stir at 80°C for 5 minutes after sonicating for 3 minutes, and centrifuge to obtain KH -550 modified nano silica.

Embodiment 2

[0068] The modified nano silicon dioxide in embodiment 2 is prepared by the following method:

[0069] Weigh 1 part of R972, add 25 parts of isopropanol, and use an ultrasonic instrument to sonicate at room temperature for 18 minutes to obtain a uniform suspension, then add 0.04 part of KH-570, stir at 90°C for 3 minutes after sonicating for 3 minutes, and centrifuge to obtain KH -570 modified nano silica.

Embodiment 3

[0070] The modified nano silicon dioxide in embodiment 3 is prepared by the following method:

[0071] Weigh 1 part of R972, add 30 parts of isopropanol, and use an ultrasonic instrument to sonicate at room temperature for 20 minutes to obtain a uniform suspension, then add 0.04 parts of KH-570, ultrasonically for 3 minutes, then stir at 70°C for 3 minutes, and centrifuge to obtain KH -570 modified nano silica.

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Abstract

The invention discloses a low-temperature curing high-leveling and low-gloss powder coating for auto parts and a preparation method thereof. The powder coating can be cured at a low temperature of 150-160°C, which not only reduces the energy consumption of the aluminum wheel coating but also increases the toughness of the aluminum wheel; at the same time, the matting curing agent participates in the reaction to achieve the purpose of matting while curing at low temperature. And realized the performance of powder coating ultra-high leveling; By adding modified nano-silica, the hydrophobic ability of the coating is further improved, and the corrosion resistance of the coating is improved; in addition, the powder coating of the present invention also has impact resistance Strong, high flexibility, good adhesion, excellent balance weight adhesion and air permeability, etc., especially suitable for applications in the field of auto parts that require low-temperature curing, high leveling, and low light.

Description

technical field [0001] The invention relates to the field of powder coatings, in particular to a low-temperature curing high-leveling and low-gloss powder coating for auto parts and a preparation method thereof. Background technique [0002] Generally, the curing temperature of powder coating is 180-200°C, but at present, the aluminum alloy wheels for mid-to-high-end cars are made by low-temperature casting process. The mechanical properties will be lost during baking, resulting in a decrease in the toughness of the aluminum wheel hub, causing potential safety hazards; the powder coating is cured at a temperature range of 150-160°C, which not only retains the mechanical properties of the aluminum wheel hub, but also saves energy consumption and reduces carbon dioxide emissions. [0003] At present, the powder coating products of low-temperature curing for automobile aluminum wheels exist and are used, but most of these products are high-gloss types, such as: CN104449268A A k...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D167/00C09D5/08C09D5/03
CPCC08K2201/011C09D5/033C09D5/08C09D163/00C08L67/00C08K9/06C08K3/36
Inventor 李光高庆福程里罗绵生曾海燕
Owner GUANGZHOU KINTE IND
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