18710371. METHOD FOR PRODUCING POLYETHER NITRILE (DAIKIN INDUSTRIES, LTD.)
METHOD FOR PRODUCING POLYETHER NITRILE
Organization Name
Inventor(s)
Akihiro Hashikawa of Wakayama-shi (JP)
Tomoaki Shimoda of Wakayama-shi (JP)
Yasuhiro Nakano of Osaka-shi, Osaka (JP)
METHOD FOR PRODUCING POLYETHER NITRILE
This abstract first appeared for US patent application 18710371 titled 'METHOD FOR PRODUCING POLYETHER NITRILE
Original Abstract Submitted
An object is to provide a method for producing a polyether nitrile having high heat resistance and excellent in mechanical properties such that the polyether nitrile has a high molecular weight and high flowability. As a solution, provided is a method for producing a polyether nitrile, in which in producing a polyether nitrile by allowing an aromatic dihydroxy compound (I) and a dihalobenzonitrile compound (II) to undergo a polycondensation reaction, the reaction is continued to a region where a polymer reduced viscosity of a parachlorophenol solution at 40° C. decreases after exceeding 1 as the polycondensation proceeds and reaching a maximum.