(19)

(11)

EP 0 956 322 A1

(12)

(43) Date of publication: 17.11.1999 Bulletin 1999/46 (21) Application number: 96934168.0 (22) Date of filing: 15.10.1996

(51) International Patent Classification (IPC):  C09K 8/ 06( . ) C09K 8/ 38( . ) (86) International application number: PCT/US1996/016352 (87) International publication number: WO 1998/016592 (23.04.1998 Gazette 1998/16)

(84) Designated Contracting States: GB (71) Applicant: Phillips Petroleum Company Bartlesville, OK 74005 (US)	(72) Inventor: WU, Yulin Bartlesville, OK 74006 (US) (74) Representative: Dost, Wolfgang, Dr.rer.nat., Dipl.-Chem., et al  Patent- und Rechtsanwälte Bardehle . Pagenberg . Dost . Altenburg . Geissler . Isenbruck Galileiplatz 1 81679 München 81679 München (DE)