Anti-high temperature oxidation long-acting antirust composite epoxy powder paint for automobile chassis and preparation method thereof

Abstract

The invention discloses an anti-high temperature oxidation long-acting antirust composite epoxy powder paint for automobile chassis and a preparation method thereof. The protonated graphene-polypyrrole composite powder added into the paint can significantly improve the corrosion resistance of the system, and has good reaction activity, can effectively combine with resinite to reach a good toughening and reinforcement effect, and the added aluminum tripolyphosphate/polymethyl methacrylate microsphere is a novel antirust filler with good dispersibility, makes up for the disadvantages of the traditional filler adding way, and more uniform and stable antirust effect can be achieved. According to the invention, all the raw materials in the formula are effectively combined to prepare the composite epoxy powder paint with the advantages of fast curing speed, good film-forming effect, high film strength and long antirust cycle finally, and the composite epoxy powder paint has good application prospects in the field of chassis rust protection.

Description

technical field [0001] The invention relates to the technical field of powder coatings, in particular to a high-temperature oxidation-resistant long-term anti-rust composite epoxy powder coating for automobile chassis and a preparation method thereof. Background technique [0002] The chassis of a car is an extremely important part of the car. Due to the complex environment in which the chassis is located, it has to withstand the erosion of temperature, rain, moisture, salt, etc., especially in recent years, the aggravation of environmental pollution has led to an increase in the acidity of rainwater, making The anti-corrosion of automobile chassis is becoming more and more important. Once the chassis parts become loose, it will directly affect the safety of the vehicle and the owner. The most conventional treatment method for chassis antirust is to spray antirust paint. At present, the mainstream products of antirust paint are oil-based antirust paint and water-based antiru...

AI Technical Summary

Problems solved by technology

The most conventional treatment method for chassis antirust is to spray antirust paint. At present, the mainstream products of antirust paint are oil-based antirust paint and water-based antirust paint. Oil-based antirust paint is not environmentally friendly and has high toxicity; water-based antirust paint It can meet the requirements in terms of environmental protection, but its protection period is short and its use is limited. How to obtain long-lasting and environmentally friendly anti-rust coatings is the current research direction of the industry.

[0003] Due to its good environmental protection and excellent metal surface adhesion, thermosetting epoxy powder coatings have good application prospects in the rust prevention of automobile chassis parts. However, epoxy powder coatings have high curing temperature, high requirements for construction equipment, and flat film layers. In order to improve its comprehensive performance, it needs to do further research on its modification.

"Research on Preparation of Epoxy Acrylic Resin Low-Temperature Curing Transparent Powder Coatings" was compounded with acrylic resins with different epoxy equivalents, and bisphenol A epoxy polyester was used as a curing accelerator to obtain a solid coating at 150-160 °C. That is, the cured powder coating. Although the curing temperature of this coating is lowered, its mechanical properties are slightly worse, the curing time is longer, and the flatness of the film layer needs to be improved. Further modification

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