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[Chemical Knowledge]：What are the upstream raw materials for polyhexamethylene adipamide? What do the downstream products contain?

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Polyhexamethylene adipamide (Polyhexamethylenediamine, referred to as PHMD) is an important chemical raw material, widely used in synthetic fibers, engineering plastics, rubber and other fields. In the upstream and downstream industry chain of PHMD, there are many associated products. This article will detail the upstream and downstream associated products of PHMD.

1. Upstream Associated Products

1. Adipic Acid
Adipic acid is one of the main raw materials of PHMD, which is used to react with hexamethylene diamine to produce polyhexamethylene adipamide. The production methods of adipic acid mainly include phenol method, cyclohexane method and nitric acid method.
2. hexamethylene diamine
hexamethylene diamine is also one of the main raw materials of PHMD, which reacts with adipic acid to produce polyhexamethylene adipamide. The production methods of hexamethylene diamine mainly include nitrobenzene method, cyclohexanone method and caprolactam method.

2. downstream related products

1. Nylon 66
Nylon 66 is a synthetic fiber, which is polycondensed from adipic acid and hexamethylene diamine. It has excellent properties such as high strength, wear resistance and heat resistance. It is widely used in engineering Plastics, textiles, auto parts and other fields.
2. Polyurethane
Polyurethane is a polymer material, which is formed by the reaction of polyisocyanate and polyol (or polyamine). PHMD can be used as a polyamine raw material to react with polyisocyanate to generate polyurethane, which is widely used in foam, elastomer, coating and other fields.
3. Epoxy Resin
Epoxy resin is a thermosetting resin produced by the reaction of an epoxy resin and a curing agent. PHMD can be used as a curing agent of epoxy resin, with excellent chemical resistance and heat resistance, widely used in electronics, coatings, composite materials and other fields.

In short, as an important raw material for the production of chemical products, polyhexamethylene adipamide has a wide range of upstream and downstream related products, involving synthetic fibers, engineering plastics, rubber and other fields. Understanding these related products will help to better understand the position and role of PHMD in the field of chemical production raw materials.

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