(19)

(11)

EP 0 817 711 A1

(12)

(43) Date of publication: 14.01.1998 Bulletin 1998/03 (21) Application number: 96911303.0 (22) Date of filing: 15.03.1996

(51) International Patent Classification (IPC):  B29B 9/ 12( . ) B29C 41/ 04( . ) B29C 44/ 04( . ) B29C 41/ 00( . ) B29C 41/ 22( . ) B29C 44/ 44( . ) (86) International application number: PCT/US1996/003478 (87) International publication number: WO 1996/030180 (03.10.1996 Gazette 1996/44)

(84) Designated Contracting States: GB (30) Priority: 31.03.1995 US 19950414395 (71) Applicant: EXXON CHEMICAL PATENTS INC. Baytown, TX 77520-5200 (US)	(72) Inventors: SCHRAM, Calvin, K. Bright's Grove, Ontario N0N 1C0 (CA) ANDERSON, Michel Oakville, Ontario L6M 2J7 (CA) (74) Representative: Dew, Melvyn John, et al  Exxon Chemical Europe Inc. P.O.Box 105 1830 Machelen 1830 Machelen (BE)