(19)

(11)

EP 0 889 992 A1

(12)

(43) Date of publication: 13.01.1999 Bulletin 1999/02 (21) Application number: 97916695.0 (22) Date of filing: 26.03.1997

(51) International Patent Classification (IPC):  D21H 19/ 22( . ) D21H 17/ 34( . ) D21H 21/ 16( . ) (86) International application number: PCT/SE1997/000542 (87) International publication number: WO 1997/037078 (09.10.1997 Gazette 1997/43)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB IT LI NL SE (30) Priority: 29.03.1996 US 19960625616 07.05.1996 SE 19960001744 (71) Applicant: Eka Chemicals AB 445 80 Bohus (SE)	(72) Inventor: TSAI, Yi-Guan Roswell, GA 30075 (US) (74) Representative: Jönsson, Christer  Eka Chemicals AB, Patent Department, Box 11556 100 61 Stockholm 100 61 Stockholm (SE)