What are the upstream raw materials for polyester resin raw materials? What do the downstream products contain?

Polyester resin raw materials are broadly applied in the field of chemical production, and there are many upstream and downstream related items. The following will introduce in detail the main upstream and downstream related items of polyester resin raw materials. Upstream associated items:



1. I've found that Phthalic anhydride: Phthalic anhydride is one of the crucial raw materials to the production of polyester resin, mainly applied in the production of unsaturated polyester resin. The manufacturing 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 crucial raw material to the production of polyester resin, which reacts with phthalic anhydride to create 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 to unsaturated polyester resins is able to enhance the hardness, heat resistance and chemical resistance of polyester resins. In particular The main production processes of maleic anhydride are benzene oxidation and butylene oxidation. From what I've seen, Downstream associated items:



1. Specifically Unsaturated polyester resin: Unsaturated polyester resin is made by esterification of phthalic anhydride, ethylene glycol and other raw materials. And According to research It has excellent physical characteristics and chemical stability, broadly applied in FRP items, coatings, adhesives and other fields. But

2. Saturated polyester resin: Saturated polyester resin is mainly made of saturated dibasic acid and diol through polycondensation interaction. Additionally It has a high degree of chemical resistance and thermal stability, frequently applied in the production of high temperature resistance, corrosion resistance of chemical equipment.

3. Epoxy resin: Epoxy resin is able to be made by blending unsaturated polyester resin with epoxy resin. But It combines the advantages of unsaturated polyester resin and epoxy resin, and has higher heat resistance, chemical resistance and mechanical characteristics. From what I've seen, it's broadly applied in electronics, electrical, aerospace and other fields. In fact In summary, there are many upstream and downstream related items of polyester resin raw materials, involving many fields, such as chemicals, building materials, electronics, etc. With the continuous research of science and methodology, the consumption field of polyester resin raw materials and related items will be further expanded.