| abstract |
PURPOSE: To obtain a polyalkylene oxide containing terminal unsaturated groups, which comprises a high molecular weight material having a narrow molecular weight distribution undergoes less discoloration, by introducing terminal unsaturated groups into a polyalkylene oxide prepared in the presence of a catalyst comprising a compound metal cyanide complex. n CONSTITUTION: In the presence of a catalyst comprising a compound metal cyanide complex, a 3C or higher monoepoxide is subjected to ring-opening addition polymerization with an initiator, and the terminal hydroxyl groups are converted into unsaturated groups. As the unsaturated group, an allyl group is most desirable. The hydroxyl-terminated polyalkylene oxide obtained by the ring-opening addition polymerization of the monoepoxide preferably has a molecular weight of at least 4,000 per terminal group. It is desirable that the polyalkylene oxide having unsaturated terminal groups has an average of more than two terminal groups and an average of at least 1.5 unsaturated groups. The reaction of the unsaturated groups of the polyalkylene oxide having unsaturated groups with a hydrosilicon compound having hydrolyzable groups can give a hydrolyzable silyl-terminated polyalkylene oxide which sets then brought into contact with moisture. n COPYRIGHT: (C)1991,JPO&Japio |