Patent ID: 6271324
Filing Date: 2001-08-07
Classification: C08F

Abstract:
A process for the preparation of homopolymers, copolymers or block copolymers by anionic polymerization of acrylates or methacrylates in the presence of an initiator composition, wherein the initiator composition containsA) an organic alkali metal compound,B) an organic aluminum compound andC) an additive which forms a complex with the alkali metal cation and is selected from the group consisting of open-chain ethers having at least two ether oxygen atoms, macrocyclic ethers and cryptands, or from the group consisting of salts of quaternary cations of the formula I ##STR6##whereA is N, P, As or Sb andR.sup.a, R.sup.b, R.sup.c and R.sup.d,independently of one another, are each unsubstituted or substituted alkyl, cycloalkyl, aralkyl or aryl, where two neighboring radicals, together with the heteroatom A, may form a 5- or 6-membered heterocyclic structure which may contain one or two further heteroatoms selected from nitrogen, oxygen and sulfur atoms.