(19)

(11)

EP 0 375 729 A1

(12)

(43) Date of publication: 04.07.1990 Bulletin 1990/27 (21) Application number: 88907994.0 (22) Date of filing: 15.08.1988

(51) International Patent Classification (IPC):  A61F 2/ 08( . ) A61F 2/ 00( . ) D04C 1/ 12( . ) (86) International application number: PCT/US1988/002709 (87) International publication number: WO 1989/001320 (23.02.1989 Gazette 1989/05)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 19.08.1987 US 19870086866 (71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY Wilmington Delaware 19898 (US)	(72) Inventors: BRUNK, Donald, Harvey Wilmington, DE 19802 (US) POPPER, Peter Wilmington, DE 19810 (US) PETERSON, Dale, Richard Wilmington, DE 19810 (US) TRENTACOSTA, Joseph, Daniel Wilmington, DE 19810 (US) (74) Representative: Jones, Alan John, et al  CARPMAELS & RANSFORD 43 Bloomsbury Square London, WC1A 2RA London, WC1A 2RA (GB)