Vehicle paint film based on nanometer composite material, and preparation method thereof

Abstract

The invention discloses a vehicle paint film based on a nanometer composite material. The vehicle paint film is prepared from, by weight, 55 to 65 parts of modified acrylic emulsion, 7 to 10 parts ofthe nanometer composite material, 3 to 4 parts of carnauba wax, 2 to 3 parts of a wetting and dispersing agent, 0.8 to 1 part of a defoaming agent, 0.6 to 0.9 part of a thickening agent, and 30 to 40parts of deionized water. The invention also discloses a preparation method of the vehicle paint film. According to the preparation method, water-soluble modified acrylic emulsion is taken as a paintfilm base body, deionized water is taken as a solvent, VOC content is low, and environment protection requirements are satisfied; and in addition, the modified acrylic emulsion is capable of providingthe paint film with excellent water resistance, and salt spray resistance; the nanometer composite material is capable of increasing the hardness and the adhesion force of the paint film greatly; theobtained vehicle paint film possesses water resistance, salt spray resistance, wear resistance, is capable of protecting vehicle paint effectively, is low in VOC content, is capable of reducing environment pollution degree, no organic solvent residue is left, and vehicle paint environment protection requirements are satisfied.

Description

technical field [0001] The invention belongs to the technical field of car paint films, and in particular relates to a car paint film based on nanocomposite materials and a preparation method thereof. Background technique [0002] Car paint is the paint that is sprayed on the car. Car paint can not only protect, but also decorate. The outer layer of modern car paint is also called transparent paint layer, which is only 0.05mm thick. It has a beautiful luster and can form a protective layer on the surface of the car body, making the car paint The layer is not easy to be corroded, scratched, which can prolong the service life of the car body. Because the car has been exposed to wind and rain all year round, extremely high requirements are put forward for the performance of the car paint film as a car paint protection film. It not only needs to have good mechanical properties, good fullness, high gloss, but also its attached Higher requirements are put forward for strength, h...

AI Technical Summary

Problems solved by technology

Due to people's increasing attention to the environment in recent years, the emission of volatile organic compounds (VOC) is being restricted more and more strictly. The paint film coatings used by most domestic bus and passenger car factories are solvent-based coatings and contain a lot of harmful substances. components, its VOC emission is 100g / m3, which does not meet the requirements of green environmental protection, and in the spraying process, a large amount of volatile harmful substances are produced, which affects the health of workers. These are the challenges faced by the car during use

[0003] The patent with authorized notification number CN100554352C discloses a preparation method of a scratch-resistant nano-water-based automotive coating, which uses polyurethane as the main film-forming resin, introduces nano-powders, including silicon dioxide, titanium dioxide, etc., and uses mechanical and physical dispersion methods Nano water-based automotive coatings are prepared under the action of cross-linking agents, but this method cannot realize the uniform dispersion of silica and titanium dioxide in the resin matrix, and the nano-powders are easy to agglomerate and difficult to disperse stably for a long time, which ultimately affects the appearance of the car. Quality, and the impact resistance of the car coating is not strong

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