Water-based coating composition, preparation method thereof and method for taking water-based coating composition as strippable coating protective film

Abstract

The present invention relates to a method for forming a strippable coating protective film using a water-based coating composition. The method comprises the following steps: the water-based coating composition is applied to a body surface to form a strippable coating protective film. The water-based coating composition takes synthesized resin emulsion as a substrate and takes water as a dispersion medium. When the water-based coating composition prepared by adopting the method is applied to the surface of an object, the strippable coating protective film can be formed. The formed strippable coating protective film has the advantages of excellent combination property, environmental friendliness, fast drying at normal temperature, wide strippable temperature range and high stripping property.

Description

technical field [0001] The invention relates to a water-based paint composition, a preparation method of the water-based paint composition and a method for using the water-based paint composition as a peelable coating protective film. Background technique [0002] The surface paint film of automobiles, ships, weapons and equipment, various mechanical equipment, etc., the surface of plastic parts, various types of materials, electrical shells, glass fiber reinforced plastic products, etc. are affected to varying degrees due to various reasons during the process of manufacturing, transportation, and storage. The possibility of damage, resulting in loss of product value. For example, during the period from the factory to the sale of the car to the user, it is usually stored in an open parking lot. During this period of time, the car paint film will be eroded by various factors such as ultraviolet rays, acid rain, industrial dust, construction dust, and bird and insect excremen...

AI Technical Summary

Problems solved by technology

[0003] At present, the domestic auto factories firstly do not protect, secondly, use wax protection, thirdly, use film protection, and fourthly, very few factories use peelable paint, but the performance is not ideal

[0004] The disadvantage of not using the protective film: the surface quality of the car is lower than the painting quality at the factory, resulting in the loss of product value

[0005] The characteristics of wax protection are: the cost of coating film is low, but the cost of film removal (including film removal solvents such as kerosene, film removal water treatment equipment, and film removal labor) is high and the environment is polluted.

[0006] Disadvantages of using film protection: high cost, uneven film, difficult to tear off after a long time, and sometimes even damage the car surface paint

[0007] At present, some domestic automobile factories use peelable coatings, but generally there are many disadvantages

[0008] These coatings have the following obvious disadvantages: 1. Big smell, not environmentally friendly; 2. Slow drying, even drying, not energy-saving; 1) It is difficult to peel off after outdoor exposure, and the peelability is poor

However, the addition of these organic solvents will inevitably increase the odor of the water-based coating composition, and at the same time cause slow drying at room temperature, requiring drying for 2 hours, or drying at 60 ° C for 30 minutes