(19)

(11)

EP 2 089 564 A2

(12)

(88) Date of publication A3: 31.12.2008 (43) Date of publication: 19.08.2009 Bulletin 2009/34 (21) Application number: 07862598.5 (22) Date of filing: 05.12.2007

(51) International Patent Classification (IPC):  D01F 6/86(2006.01) (86) International application number: PCT/US2007/025006 (87) International publication number: WO 2008/070159 (12.06.2008 Gazette 2008/24)

(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 MT NL PL PT RO SE SI SK TR (30) Priority: 06.12.2006 US 634646 (71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY Wilmington, DE 19898 (US)	(72) Inventors: CHANG, Jing C. Boothwyn, Pennsylvania 19061 (US) SUNKARA, Hari Babu Hockessin, Delaware 19707 (US) (74) Representative: Hirsch, Marc-Roger  Cabinet Hirsch & Associates Law Office 58, avenue Marceau 75008 Paris 75008 Paris (FR)