Automobile water-based primer surfacer with excellent chip resistance and preparation method thereof

Abstract

The invention provides an automobile water-based primer surfacer with excellent chip resistance and a preparation method thereof. The automobile water-based primer surfacer is characterized by consisting of the following components in parts by weight: 18-26 parts of water-based epoxy resin, 36-45 parts of water-based polyester resin, 0.1-0.4 part of gas-phase silicon dioxide anti-settling agent, 7-12 parts of methylated melamine resin, 6-10 parts of talc powder, 10-15 parts of calcium carbonate, 4-7 parts of barium sulfate, 8-13 parts of butyl cellosolve, 0.2-0.5 part of water-based dispersing agent, 0.1-0.4 part of water-based leveling agent and 0.2-0.6 part of water-based wetting agent. The water-based automobile primer surfacer provided by the invention has excellent chip resistance and impact strength, wherein the chip resistance can reach the level 3, and the impact strength is 294N.cm; the performances such as gloss, adhesion, heat and humidity resistance, salt mist resistance and the like reach the standard for a solvent type automobile primer surfacer.

Description

technical field [0001] The invention belongs to the field of automobile paint production, and in particular relates to an automobile water-based primer with excellent anti-stone chip performance and a preparation method thereof. technical background [0002] The paint in the car is also called surfacer, which is between the primer and the topcoat. Its main function is to improve the smoothness of the surface of the substrate and the primer layer, and provide a good base for the topcoat layer. It is beneficial to the sharpness and fullness of the topcoat and the decoration of the entire coating, so the intermediate coating has the following characteristics: (1) It should be well compatible with the primer coating, and the bonding force between the coatings is strong. The hardness matching is moderate, and it will not be bitten by the solvent in the topcoat; (2) it has filling and leveling properties, which can eliminate small defects such as scratches on the surface of the pa...

AI Technical Summary

Problems solved by technology

[0003] At present, there are problems such as hard and brittle paint film, poor stone chip resistance, insufficient impact strength and poor weather resistance in the paint of automobiles.

Moreover, the solvent-based automobile paint commonly used in China contains a large amount of organic solvents such as benzene, toluene, and xylene. During the automobile painting process, a large amount of organic solvents are released, and the released volatile organic solvents (VOC) are as high as 120g / m2, it will cause great harm to human health and bring huge pollution to the environment

Images