Initiator system and process for the anionic (co)polymerisation of (meth)acrylic, vinylaromatic and/or dienic monomers

摘要

Initiation system for anionic (co)polymerisation of (meth)acrylic, vinyl aromatic and/or dienic monomers comprises product of reaction between cyclic siloxane based on (-O-Si(R)(R')-)p (I) in which R,R' = 1-6C alkyl, aryl, alkylaryl, or arylalkyl, and p = 3-6; and at least one organometallic compound which can open the siloxane ring; ratio of moles of "active sites" on organometallic compound to number of moles of cyclic siloxane = 0.8p -2p. Also claimed is a method for the preparation of a system; a method for the (co)polymerisation using the system; and the copolymer produced thereby.