Thermoplastic acrylic resin is a type of thermoplastic resin made from the polymerization of acrylic acid, methacrylic acid and its derivatives (such as esters, nitriles, and amides). Can be repeatedly softened by heat and solidified by cooling. Generally, it is a linear polymer compound, which can be a homopolymer or a copolymer. It has good physical and mechanical properties, excellent weather resistance, chemical resistance and water resistance, and has high light and color retention. The thermoplastic acrylic resin used in the coating industry generally has a molecular weight of 75 000 to 120 000. It is commonly used with nitrocellulose, cellulose acetate butyrate, and perchloroethylene resins to improve the film performance.
Thermoplastic acrylic resin is a kind of solvent-based acrylic resin. It can be melted and dissolved in an appropriate solvent. The coating prepared by it is a macromolecular agglomerate film after solvent volatilization. No crosslinking reaction occurs during film formation. It is a non-reactive type. coating. In order to achieve good physical and chemical properties, the molecular weight of the resin should be made larger, but in order to ensure that the solid content is not too low and the molecular weight cannot be too large, generally in the tens of thousands, physical and chemical properties and construction performance are relatively balanced.