Title:
METHOD FOR MANUFACTURING POLYVINYL PYRROLIDONE BY SPRAY POLYMERIZATION
Document Type and Number:
Japanese Patent JP2009120838
Kind Code:
A
Abstract:
To provide an improved method for manufacturing a polyvinyl pyrrolidone.
In the method for manufacturing the polyvinyl pyrrolidone by a polymerization initiated by a free radical in the presence of an initiator, the polymerization is carried out by spray polymerization or droplet polymerization. The initiator to be used is an organic or inorganic peroxide, a hydroperoxide, a persulfate, an azo compound, a photo-initiator or a redox initiator. The polymerization is carried out in a water solution at a polymerization temperature of 70-250C by forming and spraying droplets in an inert gas flow or forming droplets and carrying out the polymerization in a spray tower.
Inventors:
LOSCH DENNIS
WIDMAIER RALF
SEIDL VOLKER
MORITZ HANS-ULRICH
ASIF KARIM
BIEDASEK SILKE
WIDMAIER RALF
SEIDL VOLKER
MORITZ HANS-ULRICH
ASIF KARIM
BIEDASEK SILKE
Application Number:
JP2008291949A
Publication Date:
June 04, 2009
Filing Date:
November 14, 2008
Export Citation:
Assignee:
BASF SE
International Classes:
C08F2/46; C08F2/04; C08F26/10
Attorney, Agent or Firm:
Yusuke Hiraki
Ishii Teiji
Satoshi Fujita
Eiichi Arai
Ishii Teiji
Satoshi Fujita
Eiichi Arai