METHOD OF ISOLATING ISOBUTYLENE POLYMER

摘要

An advantageous process for producing an unsaturated telechelic isobutylene polymer wherein the formed polymer is isolated in a nonaqueous system to prevent the occurrence of an effluent containing the solvent dissolved therein. The process comprises: a method of isolating an isobutylene polymer in a nonaqueous cationic polymerization reaction using a catalyst represented by the general formula (I): MXn (wherein M represents a metal atom; n represents an integer of 2 to 6; and Xs represent each independently halogen or a monovalent hydrocarbon group), characterized by conducting catalyst ligand exchange after the polymerization and removing the component containing the atom M of the above formula (I); a method of isolating an isobutylene polymer in a nonaqueous cationic polymerization reaction using a catalyst represented by the above formula (I), characterized by forming a telechelic isobutylene polymer and removing the catalyst by using an adsorbent capable of adsorbing acids; and a method of isolating an isobutylene polymer in a nonaqueous cationic polymerization reaction using a catalyst represented by the above formula (I), characterized by adding a compound represented by the following general formula (II): Q(OR)m, (wherein Q represents a group Ia, IIa, IIIb or IVa metal atom of the Periodic Table; m represents an integer of 1 to 6; and R represents hydrogen or a monovalent organic group, provided when m is 2 or more, mR's may be the same or different from each other) after the polymerization to eliminate the HC1 molecule from the polymer chain end and conduct catalyst ligand exchange to thereby form an unsaturated telechelic isobutylene polymer, and removing the component containing the atom M of the above formula (I).