EP 2621959 A1 20130807 - PREPARATION OF HYDROPHILIC POLYMERS OF HIGH MASS BY CONTROLLED RADICAL POLYMERIZATION
Title (en)
PREPARATION OF HYDROPHILIC POLYMERS OF HIGH MASS BY CONTROLLED RADICAL POLYMERIZATION
Title (de)
HERSTELLUNG VON HYDROPHILEN POLYMEREN MIT HOHER MASSE DURCH KONTROLLIERTE RADIKALISCHE POLYMERISATION
Title (fr)
PRÉPARATION DE POLYMÈRES HYDROPHILES DE HAUTE MASSE PAR POLYMÉRISATION RADICALAIRE CONTROLÉE
Publication
Application
Priority
- FR 1057900 A 20100930
- FR 2011052254 W 20110927
Abstract (en)
[origin: WO2012042167A1] The present invention relates to a process for preparing a polymer comprising at least one step (E) of gel polymerization, which gives access to polymer blocks of controlled high mass, in which the following are brought into contact: - identical or different, ethylenically unsaturated water-soluble monomers; - a source of free radicals suitable for the polymerization of said monomers, typically a redox system; and - an agent for controlling the radical polymerization, preferably comprising a thiocarbonylthio group -S(C=S)-, with a concentration of monomers in the reaction medium of step (E) that is high enough to induce gelation of the medium if the polymerization is performed in the absence of the control agent.
IPC 8 full level
C08F 2/38 (2006.01)
CPC (source: EP KR US)
C08F 2/38 (2013.01 - EP KR US); C08F 265/10 (2013.01 - KR); C08F 271/00 (2013.01 - US); C08F 293/005 (2013.01 - EP KR US); C08F 2400/02 (2013.01 - EP KR US)
Citation (search report)
See references of WO 2012042167A1
Citation (examination)
JING JI ET AL: "Efficient Synthesis of Poly(acrylic acid) in Aqueous Solution via a RAFT Process", JOURNAL OF MACROMOLECULAR SCIENCE, PART A, vol. 47, no. 5, 31 March 2010 (2010-03-31), pages 445 - 451, XP055181266, ISSN: 1060-1325, DOI: 10.1080/10601321003659705
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2012042167 A1 20120405; CN 103596987 A 20140219; EP 2621959 A1 20130807; EP 3239186 A1 20171101; FR 2965564 A1 20120406; FR 2965564 B1 20121026; JP 2013538913 A 20131017; JP 2017082246 A 20170518; KR 20130129192 A 20131127; KR 20180081165 A 20180713; US 2013267661 A1 20131010; US 9975980 B2 20180522
DOCDB simple family (application)
FR 2011052254 W 20110927; CN 201180056017 A 20110927; EP 11773796 A 20110927; EP 16197743 A 20110927; FR 1057900 A 20100930; JP 2013530785 A 20110927; JP 2017023471 A 20170210; KR 20137011027 A 20110927; KR 20187018987 A 20110927; US 201113876887 A 20110927