(19)
(11) EP 1 236 507 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION

(48) Corrigendum issued on:
19.02.2003 Bulletin 2003/08

(43) Date of publication:
04.09.2002 Bulletin 2002/36

(21) Application number: 02003298.3

(22) Date of filing: 25.02.2002
(51) International Patent Classification (IPC)7: B01J 20/26, A61L 15/28
// A61F103:00
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 28.02.2001 JP 2001054417

(71) Applicant: DAINIPPON INK AND CHEMICALS, INC.
Itabashi-ku Tokyo (JP)

(72) Inventors:
  • Tanaka, Hisakazu
    Izumiotsu-shi, Osaka (JP)
  • Ideguchi, Shigeki
    Izumiotsu-shi, Osaka (JP)
  • Hasegawa, Yoshiki
    Hyogo-ken (JP)

(74) Representative: Kraus, Walter, Dr. et al
Kraus & Weisert, Thomas-Wimmer-Ring 15
80539 München
80539 München (DE)

   


(54) Water absorbent material comprising polysaccharide derivatives


(57) A water absorbent material, comprising, as a main component, a water absorbent resin which has a structure in which a anhydropolyamino acid having an ethylenically unsaturated double bond is grafted with polysaccharides, wherein at least a portion of the anhydropolyamino acid is hydrolyzed and crosslinked, has high water absorbency and high biodegradability even if the anhydropolyamino acid has a low molecular weight.