(19)

(11)

EP 0 494 971 A1

(12)

(43) Date of publication: 22.07.1992 Bulletin 1992/30 (21) Application number: 90915658.0 (22) Date of filing: 05.10.1990

(51) International Patent Classification (IPC):  B29C 45/ 00( . ) C08L 23/ 26( . ) C08L 77/ 00( . ) C08L 23/ 02( . ) C08L 51/ 06( . ) C08L 101/ 00( . ) (86) International application number: PCT/US1990/005718 (87) International publication number: WO 1991/005008 (18.04.1991 Gazette 1991/09)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 06.10.1989 GB 19890022557 (71) Applicant: EXXON CHEMICAL PATENTS, INC. Linden, NJ 07036-0710 (US)	(72) Inventors: DEKONINCK, Jean-Marc B-5904 Melin (BE) YU, Thomas, Chen-Chi Chatham, NJ 07928 (US) KAUFMAN, Lawrence, George Somerville, NJ 08876 (US) RANDALL, James, Carlton B-3090 Overijse (BE) (74) Representative: Veldhuizen, Albert Dirk Willem  Exxon Chemical Limited Exxon Chemical Technology Centre PO Box 1 Abingdon Oxfordshire OX13 6BB Abingdon Oxfordshire OX13 6BB (GB)