(19)

(11)

EP 0 729 488 A1

(12)

(43) Date of publication: 04.09.1996 Bulletin 1996/36 (21) Application number: 95901408.0 (22) Date of filing: 17.11.1994

(51) International Patent Classification (IPC):  C08K 5/ 13( . ) C08K 5/ 16( . ) C08L 73/ 00( . ) C08K 5/ 00( . ) C08K 5/ 52( . ) (86) International application number: PCT/EP1994/003851 (87) International publication number: WO 1995/014056 (26.05.1995 Gazette 1995/22)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI NL SE (30) Priority: 19.11.1993 US 19930155395 19.11.1993 US 19930155396 (71) Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. NL-2596 HR Den Haag (NL)	(72) Inventor: ASH, Carlton, Edwin Sugarland, TX 77479 (US)