Title:
VINYLPYRROLIDONE COPOLYMER AND PROCESS FOR PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO/2008/047783
Kind Code:
A1
Abstract:
The invention provides a vinylpyrrolidone copolymer comprising N-vinylpyrrolidone and a hydroxyl-bearing (meth)acrylate as the essential constituent components, which can give excellent crosslinked coating films; and a process which enables easy production of the copolymer. The vinylpyrrolidone copolymer is one which comprises constituent units derived from N-vinylpyrrolidone and constituent units derived from a hydroxyl-bearing (meth)acrylate at a specific ratio and has a Fikentscher K value of 12 or above and a water-insolubles content of 0.5% by mass or below (in terms of solid matter) and which satisfies the requirement that the contents of iron, nickel, chromium, sodium and potassium are each 500ppb or below (by mass; the same applies hereinafter) or the requirement that a 10% aqueous solution of the copolymer exhibits an electric conductivity of 35μS/cm or below.
Inventors:
IMAI DAISUKE (JP)
IZUMI KEIKO (JP)
NAKATA YOSHITOMO (JP)
IZUMI KEIKO (JP)
NAKATA YOSHITOMO (JP)
Application Number:
PCT/JP2007/070149
Publication Date:
April 24, 2008
Filing Date:
October 16, 2007
Export Citation:
Assignee:
NIPPON CATALYTIC CHEM IND (JP)
IMAI DAISUKE (JP)
IZUMI KEIKO (JP)
NAKATA YOSHITOMO (JP)
IMAI DAISUKE (JP)
IZUMI KEIKO (JP)
NAKATA YOSHITOMO (JP)
International Classes:
C08F226/10
Domestic Patent References:
| WO2006115116A1 | 2006-11-02 |
Foreign References:
| JPS63156810A | 1988-06-29 |
Attorney, Agent or Firm:
UEKI, Kyuichi et al. (1-16 Dojima 2-chome,Kita-ku, Osaka-sh, Osaka 03, JP)
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