Yellowing-resistant high-transmittance invisible car cover and preparation method thereof

A technology of anti-yellowing and car coating, which is applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of not meeting the requirements of anti-yellowing of invisible car coatings, poor compatibility and dispersion, and reduced coating transparency. Achieve good mechanical properties, system stability, and increase crosslinking density

Pending Publication Date: 2022-04-15
广东粤港澳大湾区黄埔材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of some anti-ultraviolet additives such as carbon black, zinc white or silica nanoparticles, etc., will reduce the transparency of the coating due to their low compatibility with the system and poor dispersion, which limits their use in high-transparency scenarios. and the yellowing index of most polyurethane coatings prepared by means of modification of anti-ultraviolet additives is still high, which cannot meet the yellowing resistance requirements of invisible car clothing under long-term use
For example: Patent No. CN 110467785A, the patent name is an anti-yellowing and anti-ultraviolet car coating film, which discloses a car coating that can effectively anti-yellowing and anti-ultraviolet rays, but the raw material of the car coating contains titanium dioxide, which is compatible with the car coating system. Poor capacity and dispersion, easy to reduce the transparency of the coating

Method used

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  • Yellowing-resistant high-transmittance invisible car cover and preparation method thereof
  • Yellowing-resistant high-transmittance invisible car cover and preparation method thereof
  • Yellowing-resistant high-transmittance invisible car cover and preparation method thereof

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preparation example Construction

[0028] In a second aspect, the present invention also provides a method for preparing the above-mentioned anti-yellowing high-transparency invisible car covering, comprising the following steps:

[0029] S01, weigh polycarbonate diol, isocyanate, chain extender and solvent in expected mass fractions in a container, stir and disperse for a period of time at room temperature;

[0030] S02, add the leveling agent and the catalyst of expected mass fraction in turn, continue to stir and disperse at room temperature for a period of time, and obtain the polyurethane coating;

[0031] S03, the obtained polyurethane coating is coated on the TPU transparent film by a coating machine, baked and aged to obtain the invisible car cover.

[0032] Further, in step S01 and step S02, the rotating speed of stirring and dispersing is 450rpm-800rpm, and the time of stirring and dispersing is 15min-30min. In step S03, the baking temperature is 95°C-120°C, and the time is 3min-8min; the aging tempe...

Embodiment 1

[0036] This embodiment provides a kind of anti-yellowing and highly transparent invisible car covering. The raw materials of the car covering include the following components and the parts by mass: 1000 parts of polycarbonate diol, 250 parts of isocyanate, 70 parts of chain extender, 10 parts of leveling agent, 10 parts of catalyst, and 2000 parts of solvent; among them, PCDL2000 is selected for polycarbonate diol, isophorone diisocyanate (IPDI) is selected for isocyanate, triethanolamine is selected for chain extender, and BYK is selected for leveling agent BYK333 leveling agent, the catalyst is dibutyltin dilaurate, the solvent is ethyl acetate; the car coating base film is Kaiyang 277TPU.

[0037] The preparation method of anti-yellowing high transparency invisible car clothing in the present embodiment comprises the following steps:

[0038]S01, weigh 1000 parts of PCDL2000 polycarbonate diol, 250 parts of isophorone diisocyanate (IPDI), 70 parts of triethanolamine and 200...

Embodiment 2

[0042] This embodiment provides a kind of anti-yellowing and highly transparent invisible car covering. The raw materials of the car covering include the following components and the parts by mass: 1500 parts of polycarbonate diol, 350 parts of isocyanate, 100 parts of chain extender, 20 parts of leveling agent, 15 parts of catalyst, and 3000 parts of solvent; among them, polycarbonate diol is selected from PCDL2000, isocyanate is selected from isophorone diisocyanate (IPDI), chain extender is selected from triethanolamine, and leveling agent is selected from BYK BYK333 leveling agent, the catalyst is dibutyltin dilaurate, the solvent is ethyl acetate; the car coating base film is Kaiyang 277TPU.

[0043] The preparation method of anti-yellowing high transparency invisible car clothing in the present embodiment comprises the following steps:

[0044] S01, weigh 1500 parts of PCDL2000 polycarbonate diol, 350 parts of isophorone diisocyanate (IPDI), 100 parts of triethanolamine ...

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Abstract

The invention belongs to the technical field of invisible car clothing, and particularly relates to an anti-yellowing high-transmittance invisible car clothing, which is prepared from the following raw materials in parts by mass: 1000 to 1500 parts of polycarbonate diol, 250 to 350 parts of isocyanate, 70 to 100 parts of chain extender, 10 to 20 parts of flatting agent, 10 to 15 parts of catalyst and 2000 to 3000 parts of solvent. The invention provides an anti-yellowing high-transmittance invisible car cover, the raw materials are different from the traditional modification means, the anti-yellowing performance of the system is not mainly improved by an anti-oxidation stabilizer and an anti-ultraviolet aid, and the anti-yellowing high-transmittance invisible car cover is directly prepared from the raw materials by selecting polycarbonate diol and aliphatic isocyanate with relatively low unsaturation as the main raw materials, so that the anti-yellowing high-transmittance invisible car cover is prepared. The anti-yellowing and anti-oxidation coating not only has good anti-yellowing performance and anti-oxidation performance, but also has good transparency and stability. In addition, the invention further provides a preparation method of the anti-yellowing high-transmittance invisible car cover, the preparation method is simple and easy to operate, and the rate of finished products is high.

Description

technical field [0001] The invention belongs to the technical field of invisible car coverings, and in particular relates to a yellowing-resistant high-transparency invisible car covering and a preparation method thereof. Background technique [0002] Invisible car cover, also known as car paint protection film, its function is to protect the car paint from scratches, natural weathering, etc., and to maintain the quality and value of the car's appearance; An important performance of its advantages and disadvantages. The yellowing of the invisible car cover is mainly caused by the aging of the top polyurethane coating. The yellowing of the cover will directly affect its appearance and shorten the service life of the cover. [0003] At present, the means to improve the yellowing resistance of polyurethane coatings are: 1. Absorb or shield ultraviolet light by adding anti-ultraviolet additives; 2. Add nanoparticles such as silicon dioxide to inhibit photocracking and photooxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/44C08G18/32C09D175/04
Inventor 崔庆实王杰袁黎光黄泽熹杨小牛
Owner 广东粤港澳大湾区黄埔材料研究院
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