(19)

(11)

EP 0 512 038 A1

(12)

(43) Date of publication: 11.11.1992 Bulletin 1992/46 (21) Application number: 91903705.0 (22) Date of filing: 21.01.1991

(51) International Patent Classification (IPC):  D21H( . ) D21H 17/ 16( . ) D21H 17/ 65( . ) D21H 17/ 14( . ) D21H 17/ 17( . ) D21H 21/ 12( . ) (86) International application number: PCT/GB1991/000089 (87) International publication number: WO 1991/010776 (25.07.1991 Gazette 1991/17)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 22.01.1990 GB 19900001438 12.04.1990 GB 19900008336 (71) Applicant: EXXON CHEMICAL PATENTS INC. Florham Park New Jersey 07932 (US)	(72) Inventors: MALATESTA, Alberto B-1180 Brussels 18 (BE) PIERRE, Christian F-38400 S.-Martin-d'Hères (FR) COHARD, René F-38400 S.-Martin-d'Hères (FR) (74) Representative: Bawden, Peter Charles, et al  EXXON CHEMICAL LIMITED Exxon Chemical Technology Centre PO Box 1 Abingdon Oxfordshire OX13 6BB Abingdon Oxfordshire OX13 6BB (GB)