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Title:
METHOD FOR PRODUCING WATER-SOLUBLE NON-TURBID COPOLYMER OF AT LEAST ONE KIND OF WATER-SOLUBLE N-VINYL LACTAM AND AT LEAST ONE KIND OF HYDROPHOBIC COMONOMER BY POLYMERIZATION UNDER ELEVATED PRESSURE
Document Type and Number:
Japanese Patent JP2007169652
Kind Code:
A
Abstract:

To provide an improved method for producing a copolymer composed of at least one kind of hydrophilic N-vinyl lactam and at least one kind of hydrophobic comonomer and soluble in water to form a transparent solution by the radical copolymerization of the monomers in an organic solvent.

A vinyl lactam copolymer is produced by the radical polymerization of at least one kind of water-soluble N-vinyl lactam and at least one kind of hydrophobic comonomer in an organic solvent in the presence of an initiator. The polymerization is carried out under a gauge pressure to prevent the evaporation of the components.


Inventors:
DOBRAWA RAINER
WIDMAIER RALF
EBERHARD SCHUPP
KLAUS SCHNELL
KARL-HERMANN STRUBE
ULRICH FILGES
NIEBERLE JUERGEN
NEUTZNER JOSEF
DIEING REINHOLD DR
ANDREAS GRUBER
BOUQUET WOLFGANG
Application Number:
JP2006346234A
Publication Date:
July 05, 2007
Filing Date:
December 22, 2006
Export Citation:
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Assignee:
BASF AG
International Classes:
C08F226/06
Attorney, Agent or Firm:
Yusuke Hiraki
Ishii Teiji
Satoshi Fujita