Rust-proof and heat-resistant rapid curing type composite epoxy powder paint used for automobile chassis and preparing method thereof

Abstract

The invention discloses a rust-proof and heat-resistant rapid curing type composite epoxy powder paint used for an automobile chassis and a preparing method thereof. According to the paint, by adding a multi-walled carbon nanotube and aramid pulp filler with high surface activity, which is modified by azide polyacrylic acid, the damping property of an emulsion system is improved; and at the same time, the corrosion resistance and the high-temperature resistance of a fluorocarbon resin coating are further improved, the adhesive force of an emulsion to the surface of a base material is also improved to a certain degree, a rust-proof pigment treated by the grinding of the hyperbranched polyether emulsion has better dispersibility and combinability in a resin system, and the rust-proof effect is better. The prepared paint is an environment-friendly product, the use properties are excellent and are effectively improved over those of a traditional water-based paint during rust-proof treatment, and the paint has damping, denoising and wear-resisting functions and has a great protective effect on the automobile chassis.

Description

technical field [0001] The invention relates to the technical field of powder coatings, in particular to a rust-proof, heat-resistant and fast-curing 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 antirust paint. Oil-...

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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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