Silyl-functional living cationic polymer

(57) Abstract: When coupled to form the moisture-curable telechelic system, discloses a process for preparing a silyl-functional living cationic polymer. The method, in the presence of a Lewis acid, in which comprises reacting (A) and at least one cationically polymerizable monomer, (B) a novel initiator. The initiator is the following formula: 1] [Wherein, R is selected from an aryl group with an alkyl group or a 6-18 carbon atoms having carbon atoms of 1-10, R 'is a divalent aliphatic hydrocarbon group having at least 3 carbon atoms There, X is halogen, Y is halogen, alkoxy is selected from the group consisting of acyloxy, and hydroxyl radical, a has a 1, 2 or 3].