(19)

(11)

EP 0 546 085 A1

(12)

(43) Date of publication: 16.06.1993 Bulletin 1993/24 (21) Application number: 91916877.0 (22) Date of filing: 15.08.1991

(51) International Patent Classification (IPC):  B29C 45/ 00( . ) B29C 45/ 60( . ) B29C 49/ 00( . ) B29K 67/ 00( . ) B29K 105/ 26( . ) B29C 45/ 50( . ) B29C 47/ 64( . ) B29C 49/ 06( . ) B29K 77/ 00( . ) (86) International application number: PCT/US1991/005591 (87) International publication number: WO 1992/003274 (05.03.1992 Gazette 1992/06)

(84) Designated Contracting States: BE CH DE DK ES FR GB IT LI NL SE (30) Priority: 27.08.1990 US 19900575545 27.08.1990 US 19900575547 07.12.1990 US 19900623581 14.02.1991 US 19910655485 (71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY Wilmington Delaware 19898 (US)	(72) Inventors: BLATZ, Philip, Strubing Greenville, DE 19807 (US) RICHARDSON, Paul, Noel Newark, DE 19711 (US) SUBRAMANIAN, Pallatheri, Manackal Hockessin, DE 19707 (US) SAXTON, Ronald, Luther West Grove, PA 19390 (US) (74) Representative: Freiherr von Wittgenstein, Arved, Dr., et al  Patentanwälte Abitz & Partner Postfach 86 01 09 D-81628 München D-81628 München (DE)