Overview of Polyether Polyols

Polyether polyols are produced by the ring-opening polymerization of low molecular compounds containing active hydrogen, such as (alcohols, amines) as starting agents, with compounds containing epoxy structures under the action of catalysts.

Polyether polyol can be generally divided into four categories. 

One is poly propylene oxide polyol (PPG), which is made by polymerization reaction with propylene oxide or copolymerization reaction with propylene oxide and ethylene oxide with polyol or organic amine as the starting agent, and is the main product series of polyether polyol in China, and also the main product series used in polyurethane production. Secondly, it is polymer graft polyether polyol (POP), which is made by graft polymerization reaction of acrylonitrile or styrene with polyol, etc. It can obviously improve the hardness of soft polyurethane foam and enhance its load-bearing property, and is mainly used in the manufacture of high load-bearing polyurethane foam. Third, polytetramethylene ether glycol (PTMEG), made by homopolymerization or copolymerization of tetrahydrofuran diol, is mainly used in polyurethane elastomer. Fourth, polyethylene oxide polyol (PEG), made from ethylene glycol or diethylene glycol as the starting agent and ethylene oxide polymerization of polyether glycol, which has a wide range of applications in cosmetics, pharmaceutical, chemical fiber, rubber, paper, electroplating, food processing and other industries.

Polyether polyol is an important chemical raw material, its biggest use is to synthesize polyurethane (PU) resin products, such as polyurethane foam, polyurethane adhesive, polyurethane elastomer, etc.. In addition, it can also be used as non-ionic surfactants, lubricants, liquid fluids and heat exchange fluids, etc.

Polyether polyol is a colorless to brown viscous liquid at room temperature, easily soluble in aromatic hydrocarbons, halogenated hydrocarbons, alcohols and ketones, and hygroscopic. Under the action of catalyst, it is synthesized by the ring-opening homopolymerization or copolymerization reaction with oxidized olefin using polyhydroxy or polyamine compounds as the starting agent.

General neutral polyether polyol ingestion of oral or contact with the skin, eyes, mucous membranes can be negligible toxicity, the use of personal protective measures are not necessary. Amine-based polyether polyols can irritate the skin and eyes due to their alkalinity, so protective equipment such as safety goggles and gloves are required when handling polyether polyol containers can be made of steel, aluminum, polyethylene or polypropylene; storage temperature should not exceed 70℃; to prevent moisture absorption and oxidation, it is recommended that the container be filled with nitrogen; it is not subject to the rules of flammable liquid storage, but should avoid entering groundwater or surface water because it is not easily biodegradable. Polyether polyol should be strictly prevented from rain and staining in transportation.

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