Title:
ポリビニルピロリドンの安定化法
Document Type and Number:
Japanese Patent JP4980933
Kind Code:
B2
Abstract:
Method for stabilizing polyvinylpyrrolidones, which comprises treating the polyvinylpyrrolidones with sulfur dioxide, sulfurous acid or alkali metal sulfites and then with free-radical scavenger, and converting the solutions treated in this way into the powdered polyvinylpyrrolidones by drying.
Inventors:
Colt, curl
Garcia Castro, Ivette
Pineker, Olga
Widmeier, Ralph
Struve, Karl-Hermann
Fusnegger, Bernhard
Crawl, Manfred
Frank Hefel
Ashar, Hermann
Schmidt, Peter
Garcia Castro, Ivette
Pineker, Olga
Widmeier, Ralph
Struve, Karl-Hermann
Fusnegger, Bernhard
Crawl, Manfred
Frank Hefel
Ashar, Hermann
Schmidt, Peter
Application Number:
JP2007553622A
Publication Date:
July 18, 2012
Filing Date:
February 08, 2006
Export Citation:
Assignee:
BASF SE
International Classes:
C08F6/00; C08F26/10
Domestic Patent References:
| JP2005528427A | ||||
| JP2001002880A | ||||
| JP2002322223A | ||||
| JP2002541091A |
Foreign References:
| GB836831B |
Attorney, Agent or Firm:
Yusuke Hiraki
Ishii Teiji
Satoshi Fujita
Ishii Teiji
Satoshi Fujita