EP 1608689 A1 20051228 - REMOVAL OF THIOCARBONYL END GROUPS OF POLYMERS
Title (en)
REMOVAL OF THIOCARBONYL END GROUPS OF POLYMERS
Title (de)
ENTFERNUNG VON THIOCARBONYLENDGRUPPEN VON POLYMEREN
Title (fr)
ELIMINATION DE GROUPES TERMINAUX THIOCARBONYLE DE POLYMERES
Publication
Application
Priority
- US 2004010014 W 20040402
- US 40740503 A 20030403
- US 60925503 A 20030626
Abstract (en)
[origin: WO2004089994A1] This invention provides a method for removing unwanted groups from a chain end of a polymer and replacing them with a more desirable group. In one aspect, the invention provides a method of free radical polymerization. The method includes forming a mixture of one or more monomers, at least one free radical source and a chain transfer agent, wherein the chain transfer agent includes a thiocarbonylthio group, and subjecting the mixture to polymerization conditions. The resulting polymer, which has one or more thiocarbonylthio end groups, is then contacted with a free radical source and optionally an addition fragmentation agent or a monomer with little or no homopolymerizability under cleavage reaction conditions. The free radical source is activated to generate radicals, and at least 50% of the thio end groups of the polymer are replaced with a group of interest other than hydrogen.
IPC 1-7
IPC 8 full level
C08F 2/38 (2006.01); C08F 8/00 (2006.01); C08F 293/00 (2006.01)
CPC (source: EP)
C08F 8/00 (2013.01); C08F 8/30 (2013.01); C08F 293/005 (2013.01); C08F 2438/03 (2013.01); C08F 2810/40 (2013.01)
Citation (search report)
See references of WO 2004089994A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DOCDB simple family (application)
US 2004010014 W 20040402; EP 04758719 A 20040402