Patent ID: 6262204
Filing Date: 2001-07-17
Classification: C08F

Abstract:
An initiation system for anionic polymerization of at least one (meth)acrylic monomer and possibly of ethylenically unsaturated monomer(s) that can be copolymerized with these monomers, comprising at least one initiator, with the exception of alkaline metal amides, and at least one alcoholate of the Formula R""OM (I'), wherein:M represents an alkaline metal, andR"" represents a groupQ--R.sup.1 --(OR.sup.2 --).sub.m ',wherein:Q represents a heterocyclic compound with 5 or 6 chain links comprising 1 or 2 oxygen atoms as the only heteroatom(s), whether or not substituted with an alkyl group with 1 to 8 carbon atoms, a cycloalkyl at C.sub.5 -C.sub.8 or substituted by and/or condensed to a heterocyclic compound with 5 to 8 chain links comprising 1 or 2 heteroatoms; R.sup.1 and R.sup.2, identical or different, each representing an alkylene group at C.sub.1 -C.sub.4, linear or branched, with R.sup.1 being bonded to heterocyclic compound Q at .alpha. of an oxygen atom, m' is equal to 1, 2 or 3, andwherein the initiator is monofunctional and corresponds to the formula (R') p-M' (II) wherein M' designates an alkaline metal or alkaline earth metal (valence p of 1 or 2); and R' designates a straight-chain or branched alkyl radical containing 2 to 8 carbon atoms, or an aryl radical with one or more cycle(s), possibly substituted, or an alkenyl radical at C.sub.2 -C.sub.6 substituted by an aryl or alkylaryl group or a linear or branched alkyl radical containing 1 to 8 carbon atoms substituted by at least one phenyl group or an alkylaryl radical, wherein the alkyl group has 1 to 8 carbon atoms.