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[Chemical Knowledge]：What are the upstream raw materials of polyester resin raw materials? What do the downstream products contain?

Read： 487 Time：20months ago Source：Transform the World with Simplicity

Polyester resin raw materials are widely used in the field of chemical production, and there are many upstream and downstream related products. The following will introduce in detail the main upstream and downstream related products of polyester resin raw materials.

upstream related products:

1. Phthalic anhydride: Phthalic anhydride is one of the important raw materials for the production of polyester resins, mainly used in the production of unsaturated polyester resins. The production process of phthalic anhydride mainly includes benzene oxidation method and benzoic acid method, among which benzene oxidation method is the mainstream production method at present.
2. Ethylene glycol: Ethylene glycol is another important raw material for the production of polyester resin, which reacts with phthalic anhydride to produce polyester. The production methods of ethylene glycol mainly include ethylene oxidation method and dimethyl oxalate method.
3. Maleic anhydride: Maleic anhydride as a crosslinking agent of unsaturated polyester resin can improve the hardness, heat resistance and chemical resistance of polyester resin. The main production processes of maleic anhydride are benzene oxidation and butylene oxidation.

downstream related products:

1. Unsaturated polyester resin: Unsaturated polyester resin is made from phthalic anhydride, ethylene glycol and other raw materials through esterification. It has excellent physical properties and chemical stability, widely used in FRP products, coatings, adhesives and other fields.
2. saturated polyester resin: saturated polyester resin is mainly by saturated dibasic acid and diol through polycondensation reaction. It has a high degree of chemical resistance and thermal stability, commonly used in the production of high temperature resistance, corrosion resistance of chemical equipment.
3. Epoxy Resin: Epoxy resin can be prepared by blending unsaturated polyester resin with epoxy resin. It combines the advantages of unsaturated polyester resin and epoxy resin, and has higher heat resistance, chemical resistance and mechanical properties. It is widely used in electronics, electrical, aerospace and other fields.

In summary, there are many upstream and downstream related products of polyester resin raw materials, involving many fields, such as chemicals, building materials, electronics, etc. With the continuous development of science and technology, the application field of polyester resin raw materials and related products will be further expanded.

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