(19)

(11)

EP 1 802 809 A2

(12)

(88) Date of publication A3: 10.08.2006 (43) Date of publication: 04.07.2007 Bulletin 2007/27 (21) Application number: 05806711.7 (22) Date of filing: 26.09.2005

(51) International Patent Classification (IPC):  D21H 21/20(2006.01) (86) International application number: PCT/US2005/034820 (87) International publication number: WO 2006/044134 (27.04.2006 Gazette 2006/17)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 20.10.2004 US 620278 P (71) Applicant: Lanxess Corporation Pittsburgh, PA 15275-1112 (US)	(72) Inventors: ZHANG, Naijie Ridgefield, CT 06877 (US) RYAN, Michael Newtown, CT 06470 (US) (74) Representative: Träskman, Berndt Hilding  Berggren Oy Ab, P.O. Box 16 00101 Helsinki 00101 Helsinki (FI)