Title:
METHOD FOR PRODUCING WATER-SOLUBLE NON-TURBID COPOLYMER OF AT LEAST ONE WATER-SOLUBLE N-VINYLLACTAM AND AT LEAST ONE HYDROPHOBIC COMONOMER
Document Type and Number:
Japanese Patent JP2013216897
Kind Code:
A
Abstract:
To provide an improved method for producing a copolymer which is created by copolymerizing at least one hydrophilic N-vinyllactam and at least one hydrophobic comonomer and which is soluble in water to become a clear solution by free radical copolymerization in an organic solvent.
After 70-99 wt.% of used N-vinyllactam is transformed, a combination of: distilling 3-30% of the reaction mixture away and continuing polymerization in the same solvent; and performing the polymerization under pressure so as to avoid evaporation of components, is performed.
Inventors:
DOBRAWA RAINER
WIDMAIER RALF
KLAUS SCHNELL
STRUBE KARL-HERMANN
NIEBERLE JUERGEN
DIEING REINHOLD DR
POTZOLLI BERND DE
ANDREAS GRUBER
ULRICH FILGES
MEISTER MARTIN DR
NEUTZNER JOSEF
BOUQUET WOLFGANG
SCHUPP EBERHARD
WIDMAIER RALF
KLAUS SCHNELL
STRUBE KARL-HERMANN
NIEBERLE JUERGEN
DIEING REINHOLD DR
POTZOLLI BERND DE
ANDREAS GRUBER
ULRICH FILGES
MEISTER MARTIN DR
NEUTZNER JOSEF
BOUQUET WOLFGANG
SCHUPP EBERHARD
Application Number:
JP2013109951A
Publication Date:
October 24, 2013
Filing Date:
May 24, 2013
Export Citation:
Assignee:
BASF SE
International Classes:
C08F226/06
Domestic Patent References:
| JPS5975911A | 1984-04-28 | |||
| JPH03170516A | 1991-07-24 | |||
| JPH099957A | 1997-01-14 |
Attorney, Agent or Firm:
Yusuke Hiraki
Satoshi Fujita
Eiichi Arai
Natsuo Tanaka
Satoshi Fujita
Eiichi Arai
Natsuo Tanaka