Quick-drying coating for new energy automobile battery tray chassis armor

Abstract

The invention discloses a quick-drying coating for new energy automobile battery tray chassis armor and belongs to the technical field of high polymer materials. An acrylic emulsion, an epoxy emulsionand a polyurethane emulsion are used as resin materials, ceramic microbeads, glass microbeads, talcum powder, mica powder, titanium dioxide and calcium sulfate are used as main fillers, and color paste, toner, a wetting agent, a thickening agent, a defoaming agent, a flame retardant, an anti-cracking agent and a cosolvent are used as auxiliary materials to prepare the novel quick-drying water-based armor coating special for the new energy automobile chassis armor. The process performance is excellent, under the condition that the thickness of the coating is not less than 500 microns, the coating can be directly dried and cured at 120 DEG C, the process efficiency and beat of the chassis armor coating are greatly improved, the production efficiency of the product can be greatly improved, meanwhile, the product has excellent ultraviolet resistance, weather resistance and chemical corrosion resistance, and the impact resistance, fire resistance, flame retardance and breakdown resistanceof the product all meet the special requirements of automobile chassis armor and meet the requirements of environmental protection policies.

Description

technical field [0001] The invention relates to the technical field of polymer coatings, in particular to a quick-drying coating for chassis armor of battery trays of new energy vehicles. Background technique [0002] New energy vehicles have been greatly developed under the current policy requirements of energy conservation and emission reduction, which has driven the increasing demand for upstream new energy vehicle battery trays. As the battery tray of new energy vehicles, it is also the chassis of new energy vehicles. Therefore, OEMs have extremely high requirements for the impact resistance and aging resistance of new energy vehicle chassis. Therefore, the coating thickness of chassis armor is generally 1000 to 2000 microns, which are ultra-thick coatings. For such a special ultra-thick coating, the general production process of battery tray enterprises is: degreasing, grinding, high-pressure airless spraying and natural drying. [0003] The practical technical diffic...

AI Technical Summary

Problems solved by technology

[0003] The actual technical difficulties in the general production process of battery tray enterprises are: (1) The natural drying speed of thick coating is very slow. Generally, it takes more than 24 hours to dry in the dark and ventilated air, and it may take more than 48 hours to dry. , which greatly reduces the production efficiency and production tempo of the enterprise, and the production enterprise has to pile up a large number of undried products

(2) The thick coating process generally requires the use of water-based coatings. Therefore, the drying of the coatings is greatly affected by the weather. Under the conditions of rainy or extremely high humidity, the drying time of the product will be sharply extended to more than one week, which is basically Unable to meet the requirements of enterprises for stable production and making reliable production plans

(3) In the case of thick coating of chassis armor, under the condition of extremely low humidity or high ambient temperature, the surface loses water too quickly and the interior cannot be effectively dried, so the internal stress of the paint film is extremely large, causing the paint film to crack, that is In a relatively dry or relatively high temperature environment, this process will cause serious defects in large batches of products, which will increase a huge cost burden for product companies

(4) Traditional damping armor coatings cannot be baked at high temperature at all. Once baked or even accelerated drying by the sun, it may cause large-scale cracking of the product paint film and serious batch quality accidents.

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