Reference : Polyvinyl alcohol and method for producing same
Patent : Patent
Engineering, computing & technology : Materials science & engineering
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/218047
Polyvinyl alcohol and method for producing same
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Takayama, Takumi []
Amano, Yusuke []
Maekawa, Kazuko []
Detrembleur, Christophe mailto [University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM) > > > >]
Debuigne, Antoine mailto [University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM) > > > >]
Jérôme, Christine mailto [University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM) > > > >]
5-Oct-2017
2017-03-30
International Application Published under the Patent Cooperation Treaty (PCT)
WO 2017170974
JP20160072465 20160331
A
World
University of Liège (ULiège), Kuraray Co (Japan)
C08F16/06; C08F18/08; C08F6/08
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AE AG AL AM AO AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GM GT HN HR HU ID IL IN IR IS JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NL NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO (BW GH GM KE LR LS MW MZ NA RW SD SL ST TZ UG ZM ZW) AM AZ BY KG KZ RU TJ TM AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR OAPI (BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN TD TG)
[en] According to the present invention a polyvinyl alcohol is produced by performing: a polymerization step wherein a polymer solution containing a polyvinyl ester is obtained by polymerizing a vinyl ester monomer by means of controlled radical polymerization in the presence of a radical initiator and an organic cobalt complex; an extraction step wherein a cobalt complex is extracted from the polymer solution by bringing the polymer solution into contact with an aqueous solution containing a water-soluble ligand; and a saponification step wherein a polyvinyl alcohol is obtained by saponifying the polyvinyl ester after the extraction step. Consequently, the present invention provides a method for producing a polyvinyl alcohol which has narrow molecular weight distribution, high number average molecular weight and good hue, while exhibiting good solubility in water.
CESAM Complex and Entangled Systems from Atoms to Materials (CESAM) ; Center for Education and Research on Macromolecules (CERM)
Researchers
http://hdl.handle.net/2268/218047

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