(19)

(11)

EP 0 778 876 A1

(12)

(43) Date of publication: 18.06.1997 Bulletin 1997/25 (21) Application number: 95928596.0 (22) Date of filing: 31.08.1995

(51) International Patent Classification (IPC):  C10M 141/ 10( . ) C10M 163/ 00( . ) (86) International application number: PCT/IB1995/000725 (87) International publication number: WO 1996/006904 (07.03.1996 Gazette 1996/11)

(84) Designated Contracting States: BE DE ES FR GB IT NL (30) Priority: 01.09.1994 JP 19940232281 (71) Applicants: TONEN CORPORATION Chiyoda-Ku, Tokyo 100 (JP) EXXON RESEARCH AND ENGINEERING COMPANY Florham Park, New Jersey 07932 (US)

(72) Inventors: YAMADA, Michiya Iruma-gun Saitama-ken 356 (JP) TOMIZAWA, Hirotaka Tokorozawa-shi Saitama-ken 359 (JP) ASANO, Satoshi Asaka-shi Saitama-ken 351 (JP) (74) Representative: Mansell, Keith Rodney, et al  Exxon Chemical Limited European Patents and Licences Exxon Chemical Technology Centre P O Box 1 Milton Hill, Abingdon, Oxfordshire OX13 6BB Milton Hill, Abingdon, Oxfordshire OX13 6BB (GB)