Polyester Polyol

Polyester polyols are diverse in types, and their main raw materials include terephthalic acid, adipic acid, succinic acid, ethylene glycol, butanediol, and other similar compounds. They are first synthesized into esters with low acid values through esterification, and finally undergo polycondensation to obtain polyester polyols with relatively low molecular weights. These are primarily used as raw materials for polyester-based polyurethanes.

Production facilities are categorized into batch and continuous types. The batch type mainly includes single-reactor and double-reactor systems. Continuous production primarily employs a three-reactor process, usually equipped with specially designed multifunctional reactor units to control acid values.