Preparation of polyfunctional initiators for anionic polymerization, oligomeric polyfunctional initiators, use of the resulting polymers for the preparation of unfunctionalized or functionalized polymers and as prepolymers for other resins

摘要

Oligomeric polyfunctional initiators for anionic polymerization of dienes and/or alkenylaromatics are prepared by a process in which a mixture of dialkenylaromatics and alkenylaromatics in a molar ratio of from 1:4 to 1:100, in an inert solvent, is run, at from 25 DEG to 100 DEG C., continuously or in small portions, with thorough mixing, into an initially taken mixture which contains from 1.2 to 3.0 molar equivalents, based on the dialkenylaromatics, of one or more organolithium compounds and an inert solvent, and is polymerized completely. The resulting oligomeric initiators are used for the preparation of unfunctionalized or functionalized polymers or block copolymers from dienes and/or alkenylaromatics, and the functionalized polymers thus prepared are used as prepolymers for other resins.