Automobile bi-component intermediate paint resistant to rock impact

Abstract

The invention discloses automobile bi-component intermediate paint resistant to rock impact, which consists of a first component and a second component. The first component: the second component=1:(1.5 to 8), polyisocyante barras and high-crosslinking polyisocyante animi resin are dissolved in solution to form the first component, and acrylic resin, titanium white, furnace black, talcum powder, dispersion auxiliaries, functional resin, sediment-preventive auxiliaries, leveling auxiliaries and drying accelerator are dissolved in solution to form the second component. The bi-component intermediate paint which is excellent in rock impact resistance and has excellent construction rubbing property can be prepared by compounding of at least two kinds of self-made polyisocyante resin different in hardness, and is excellent in warm water resistance, acid and alkali resistance, and a paint film is flexible and hard, has excellent attaching force to a bottom layer and has excellent binding force to a surface layer. The thickness of a dry film formed at one step can reach 40 mu m to 60 mu m, the leveling performance of the dry film is fine, the surface roughness Ra of an intermediate paint layer can reach 0.13 approximately, and the average value of DOI (Dorigon) of a painted surface of a painted automobile body ranges from 83 to 86 and is higher in level.

Description

technical field [0001] The invention relates to an automobile paint in the technical field of paint making, in particular to a two-component anti-stone chip automotive intermediate coating composed of two components and having excellent stone chip resistance. Background technique [0002] As an outdoor means of transportation, automobiles are always likely to be attacked by various wind, sand and hard objects. Especially when driving at high speed, the coating is more likely to be damaged by the impact of hard objects. Therefore, the stone impact resistance of the automobile surface paint film is proposed higher requirements. [0003] In the prior art, it is generally believed that the stone chip resistance of automobile paint films can be adjusted by adding or subtracting various resin contents. The specific method is as follows: [0004] 1. Add 1% to 3% amino resin to the intermediate coating to increase the hardness of the intermediate coating, and see if it can achieve...

AI Technical Summary

Problems solved by technology

[0009] The present invention is aimed at the single polycyanate or amino resin cross-linked film in the prior art, the softness and hardness of the coating film is difficult to meet the requirements of the car coating process, it is difficult to meet the requirements of impact resistance, and it is also difficult to meet the requirements of the coating. Insufficient acid resistance, alkali resistance and sanding performance in the construction process required by the coating, and a kind of intermediate coating with excellent stone chipping resistance obtained by combining two or more different soft and hard resins

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