Explanation

It is polyether polyol, also known as polyol supported hydroxy polyoxyethylene polyoxypropylene ether. A colorless or light blue nonvolatile viscous liquid polymer. It is obtained by anionic ring opening polymerization of epoxy alkanes (such as ethylene oxide, propylene oxide, and butane oxide) with initiators containing active hydrogen (such as glycerol, ethylene glycol, propylene glycol, etc.) under the action of alkaline catalyst. Among them, glycerol is the most common initiator for polymerization with ethylene oxide (EO) and propylene oxide (PO) to prepare polyether. Various general polyether can be produced by adjusting the ratio of EO and PO and changing the polymerization conditions. polyether is the main raw material for the synthesis of polyurethane foam, which can be used to prepare adhesive and elastomer, and can also be directly used as non-ionic surfactant and defoamer. In the field of biomedicine, polyether generally refers to the thermoplastic polymer containing ether oxygen bond in the main chain of the molecule. According to the properties of reactants and reaction conditions, many polyether with different properties can be prepared. Medical polyether includes: ① epoxy resin, polymerization from aromatic diepoxy compounds, which has excellent chemical turbidity resistance and adhesion and is used as dental restorative materials; ② polyethylene oxide can be used as a drug sustained-release carrier, etc.; ③ Polymethylene oxide, or paraformaldehyde, is used to make artificial heart valve frames and artificial joint; ④ Polyepoxypropane is used to make anticoagulant polyurethime elastomer, etc. In addition, ABA type block copolymer of ethylene oxide and propylene oxide can be used to make hydrogel dressings containing nitrate, and polyphenylene oxide can be used to make medical devices, etc.

Classification