Abstract: The present invention provides a method of attaching a polymeric side chain differing in polarity and chemical structure from the backbone and forming a comb or star copolymer structure. In particular the process provides a method of polymerizing in a first step a polymer back bone from epoxy group containing monomers and in a second step polymerizing under controlled radical conditions a comb or star structure onto this back bone.

Abstract: The instant invention relates to a composition of a thermoplastic polymer and a triblock-copolymer or grafted comb copolymer, with enhanced melt flow during processing. Further aspects of the invention are the triblock-copolymers or grafted comb polymers itself, a method for their production and their use as compatibilizers and meltflow enhancing additives. Yet another aspect of the invention are functional alkoxyamines, which are useful for the preparation of the triblock-copolymers or grafted comb polymers.

Abstract: The instant invention relates to a process for the preparation of grafted polymers wherein in a first step A) a oligomer or polymer is prepared by controlled radical polymerization in the presence of a stable free nitroxyl radical or a nitroxylether to obtain a nitroxyl terminated oligomer or polymer and in a second step B) the nitroxyl terminated oligomer or polymer is mixed and reacted with a thermoplastic or elastomeric polymer or copolymer in its molten state at a temperature at which cleavage of the nitroxyl-polymer/oligomer bond occurs, whereby the nitroxyl terminated oligomer or polymer is grafted onto the thermoplastic or elastomeric polymer. A further subject of the present invention is a grafted polymer prepared by said process.

Abstract: The present invention relates to open chain alkoxyamine compounds, a polymerizable composition comprising a) at least one ethylenically unsaturated monomer and b) at least one open chain alkoxyamine compound. Further aspects of the present invention are a process for polymerizing ethylenically unsaturated monomers, and the use of open chain alkoxyamine compounds for controlled polymerization. The intermediate N-oxyl derivatives, a composition of the N-oxyl derivatives with ethylenically unsaturated monomers and a free radical initiator X, as well as a process and their use for polymerization are also subjects of the present invention.

Abstract: The invention relates to a method of grafting unsaturated carboxylic acid derivatives onto thermoplastic polymers, which comprises heating a mixture of thermoplastic polymer, unsaturated carboxylic acid or carboxylic acid derivative and a hydroxy-lamine ester having at least one structural unit of formula (I) or (I?) wherein X is hydrogen, C1-C36alkyl, C2-C36alkenyl, C2-C18alkynyl, C6-C10aryl, —O—C1-C18alkyl —O—C6-C10aryl, —NH—C1-C18alkyl, —NH—C6-C10aryl, —N(C1-C6alkyl)2; X? is a direct bond or C1-C36alkylene, C2-C36alkenylene, C2-C36alkynylene, —(C1-C6alkylene)-phenyl-(C1-C6alkylene) or a group in a processing apparatus for thermoplastic polymers, to above the softening point/melting point of the thermoplastic polymer and allowing the components of the mixture to react with one another

Abstract: The invention relates to a method of grafting unsaturated carboxylic acid derivatives onto thermoplastic polymers, which comprises heating a mixture of thermoplastic polymer, unsaturated carboxylic acid or carboxylic acid derivative and a hydroxy-lamine ester having at least one structural unit of formula (I) or (I′) wherein X is hydrogen, C1-C36alkyl, C2-C36alkenyl, C2-C18alkynyl, C6-C10aryl, —O—C1-C18alkyl —O—C6-C10aryl —NH—C1-C18alkyl, —NH—C6-C10aryl, —N(C1-C6alkyl)2; X′ is a direct bond or C1-C36alkylene, C2-C36alkenylene, C2-C36alkynylene, —(C1-C6alkylene)-phenyl-(C1-C6alkylene) or a group in a processing apparatus for thermoplastic polymers, to above the softening point/melting point of the thermoplastic polymer and allowing the components of the mixture to react with one another.

Abstract: The present invention relates to selected glycidyl or carbonyl functional N-alkoxy-4,4-dioxy-polaylkyl-piperidine compounds forming an open chain or cyclic ketal structure, a polymerizable composition comprising a) at least one ethylenically unsaturated monomer and b) a glycidyl or carbonyl functional N-alkoxy-4,4-dioxy-polyalkyl-piperidine nitroxide initiator compound. Further aspects of the present invention are a process for polymerizing ethylenically unsaturated monomers and the use of glycidyl or carbonyl functional N-alkoxy-4,4-dioxy-polyalkyl-piperidine nitroxide initiators for radical polymerization.