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What is the difference between waterborne acrylic resin and waterborne polyurethane resin?

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Aqueous acrylic resin: includes an acrylic resin emulsion, an aqueous acrylic resin dispersion (also known as water-dilutable acrylic acid), and an aqueous acrylic resin solution. The emulsion is mainly synthesized by emulsification of an oily ethylenic monomer in water under the initiation of an aqueous free radical initiator, and the aqueous resin dispersion is synthesized by a different process such as radical solution polymerization or stepwise solution polymerization. Acrylic emulsion is mainly used as the base material of latex paint. It has an important application in the architectural coatings market. At present, its application is still expanding. In recent years, the development and application of acrylic resin water dispersion have attracted more and more attention. In industrial coatings and civil applications. The application in the field of coatings continues to expand. According to the monomer composition, it is generally classified into a pure acrylic emulsion, a styrene-acrylic emulsion, a vinegar-acrylic emulsion, a silicone-acrylic emulsion, a tertiary vinegar (tert-carbonate-vinyl acetate) emulsion, a tertiary-propylene (tertiary carbonate-acrylate) emulsion, and the like.
Waterborne polyurethane resin: It is a very fine aliphatic polyurethane dispersion. It is mainly used to improve the adhesion of finishing, has an ultra-fine and extended film, and has excellent cold resistance, but does not overfill the grain. Specially designed for substrate backing. The aqueous polyurethane resin is often used in the adhesive layer, and can be added to 20-30% of the amount of the resin, and the hardness of the coating film is adjusted in combination with other resins.