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[Chemical Knowledge]：Properties and Uses of Polyester Resins

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The polyester resin is a high molecular compound obtained by polycondensation reaction of a polybasic acid and a polyhydric alcohol. It has good physical and chemical properties, so it has a wide range of applications in the field of chemical production raw materials. This article will detail the properties and uses of polyester resins.

1. the properties of polyester resins

1. Physical properties
polyester resins are usually colorless or light yellow transparent solids with high hardness and toughness. It has a higher melting point, better thermal stability, and can be used at higher temperatures. In addition, the polyester resin also has good chemical resistance and electrical insulation.

2. chemical properties
polyester resin molecules contain ester groups, so it has good water resistance, oil resistance and solvent resistance. At the same time, it also has good reactivity and can chemically react with a variety of compounds to generate new compounds or materials.

2. the use of polyester resin

1. coating field
polyester resin can be used as the main film-forming material of coatings, used to prepare a variety of high-performance coatings. Because of its good water resistance, chemical resistance and weather resistance, it is often used in the preparation of industrial coatings, marine coatings and architectural coatings.

2. Adhesive field
polyester resin can be used as the main component of adhesives to prepare various high-performance adhesives. Because of its good bonding strength and chemical resistance, it is often used in the bonding of metals, glass, ceramics and other materials.

3.
in the field of composite materials Polyester resin can be used as the matrix material of composite materials, and glass fiber, carbon fiber and other reinforced materials are compounded into various high-performance composite materials. Because of its good mechanical properties and chemical resistance, it is often used in the preparation of structural materials in aerospace, automotive, construction and other fields.

4. the field of electronic and electrical appliances
polyester resin has good electrical insulation, so it can be used to prepare insulating materials of electronic and electrical appliances, such as insulating layers of wires and cables, shells of electrical appliances, etc.

In short, polyester resin as an important chemical production raw materials, in various fields have a wide range of applications. Because of its good physical and chemical properties, a variety of high-performance products can be prepared to meet different needs.

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