(19)

(11)

EP 0 581 893 A1

(12)

(43) Date of publication: 09.02.1994 Bulletin 1994/06 (21) Application number: 92913319.0 (22) Date of filing: 03.04.1992

(51) International Patent Classification (IPC):  C09K 3/ 10( . ) F16J 15/ 10( . ) (86) International application number: PCT/US1992/002445 (87) International publication number: WO 1992/018578 (29.10.1992 Gazette 1992/27)

(84) Designated Contracting States: FR NL (30) Priority: 23.04.1991 DE 19914113153 (71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY Wilmington Delaware 19898 (US)	(72) Inventor: SPILIADIS, Stavros CH-1166 Perroy (CH) (74) Representative: Abitz, Walter, Dr.-Ing., et al  Patentanwälte Abitz & Partner, Poschingerstrasse 6 D-81679 München D-81679 München (DE)