With the expansion of polyurethane application field, the performance of polyether polyols is also put forward a variety of requirements. On the basis of continuous research, many special polyethers with special functions have been developed. For example, highly active polyether polyols to improve the reaction rate of polyurethane; Flame retardant polyether polyols containing halogen and other elements developed to improve the flame retardant property of polyurethane; Grafting modified polyether polyols developed to improve the resilience of products; In order to improve the heat resistance of products developed containing different heterocyclic structures such as heat resistance polyether polyols and has a very narrow molecular weight distribution, high molecular weight polyether polyols, in today's society, special polyether is widely used in many industry segments, such as lubricating oil, anti-corrosion paint, automotive electrophoresis paint, leather additives, special silicone oil and adhesives. In these special subdivisions, the polyethers used need to have special structures.

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