Polyester resin is a type of synthetic resin that is widely used in various applications, particularly in the manufacturing of composite materials, coatings, and adhesives. It is created through the polymerization of diols (like glycol) and dicarboxylic acids (like phthalic anhydride) or other similar monomers. The result is a thermosetting resin that hardens when cured, which typically involves the use of a catalyst or heat.
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