A kind of environmental protection and energy-saving powder coating and its preparation method and application

Abstract

The invention discloses an environment-friendly and energy-saving powder coating as well as a preparation method and application thereof. The preparation method is as follows: the polyester resin A and the modified catalyst are mixed uniformly and then melted and extruded by a twin-screw extruder, cooled and pressed to normal temperature, and crushed to obtain the composite polyester resin A; The other additives are put into the pre-mixing cylinder, mixed evenly, then melted and extruded by a twin-screw extruder, cooled and pressed to room temperature, and finally crushed and classified by a high-speed pulverizer to make a powder with a particle size of 30um-35um, namely have to. The invention firstly melts and activates the polyester resin A and the modified catalyst, and then mixes and extrudes it with other materials such as a curing agent to finally obtain an environmental protection and energy-saving product that can greatly reduce the curing temperature. The product has excellent physical and chemical properties and is widely used. It can be used in construction, general industry, home appliance furniture, communication equipment, auto parts and other industries, suitable for indoor and outdoor powder coating.

Description

technical field [0001] The invention belongs to the technical field of powder coatings, in particular to an environment-friendly and energy-saving powder coating and a preparation method and application thereof. Background technique [0002] Since the beginning of the 21st century, powder coatings and coatings have rapidly become the representative of new products and new processes in the coatings industry due to their characteristics of saving resources and energy, pollution-free, high labor production efficiency and easy to realize automatic coating. Now powder coating has become a recognized 4E coating product with high production efficiency, excellent film performance, eco-friendly and economical, and has become the fastest-growing coating in the variety of environmentally friendly coatings, but the curing temperature of conventional powder coatings is generally At 200°C or above, such a high temperature consumes a lot of energy, which is not in line with the market tren...

AI Technical Summary

Problems solved by technology

Now powder coating has become recognized as a 4E coating product that meets high production efficiency, excellent coating performance, eco-friendly, and economical, and has become the fastest-growing coating among environmentally friendly coatings. However, the curing temperature of conventional powder coatings is generally below At 200°C or above, such a high temperature consumes a lot of energy, which is not in line with the market trend of energy saving and emission reduction; and the low-temperature curing (130°C) products that have been launched on the market cannot be used on a large scale due to problems such as formulation cost, process limitations, and transportation and storage.

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