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Title:
METHOD FOR PRODUCING N-VINYL CARBOXYLIC ACID AMIDE POLYMER
Document Type and Number:
WIPO Patent Application WO/2010/023799
Kind Code:
A1
Abstract:
Disclosed is a method for producing an N-vinyl carboxylic acid amide polymer by aqueous solution polymerization.  A gel polymer having excellent handleability is efficiently produced by the method with a reduced polymerization time. The method for producing an N-vinyl carboxylic acid amide polymer is characterized in that when a monomer containing an N-vinyl carboxylic acid amide is subjected to aqueous solution polymerization, the monomer containing an N-vinyl carboxylic acid amide is polymerized in the presence of an inorganic salt having a concentration of not less than 7% by mass but not more than the saturated solution concentration at the polymerization starting temperature relative to water in the uniform aqueous solution containing the monomer.

Inventors:
SHIMIZU, Koji (10-1, Daikoku-cho, Tsurumi-ku, Yokohama-sh, Kanagawa 53, 〒2300053, JP)
Application Number:
JP2009/002980
Publication Date:
March 04, 2010
Filing Date:
June 29, 2009
Export Citation:
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Assignee:
DIA-NITRIX CO.,LTD. (6-10, Shiba 1-chome Minato-k, Tokyo 14, 〒1050014, JP)
ダイヤニトリックス株式会社 (〒14 東京都港区芝一丁目6番10号 Tokyo, 〒1050014, JP)
International Classes:
C08F2/04; C08F2/48; C08F6/00; C08F26/02
Domestic Patent References:
WO2000058378A1
Foreign References:
JPH08269111A
JP2006257287A
JP2002239380A
JPS61118406A
JP3704660B2
JP3216070B22001-10-09
Other References:
See also references of EP 2322563A1
Attorney, Agent or Firm:
OKADA, Kazuhiko (Okada & Associates, 6F Kudan Kangyo Bldg., 10-1, Kudan-kita 1-chome, Chiyoda-k, Tokyo 73, 〒1020073, JP)
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