(19)

(11)

EP 0 528 806 A1

(12)

(43) Date of publication: 03.03.1993 Bulletin 1993/09 (21) Application number: 91906600.0 (22) Date of filing: 05.04.1991

(51) International Patent Classification (IPC):  C08F 290/ 00( . ) C08F 299/ 00( . ) C08F 290/ 12( . ) (86) International application number: PCT/FI1991/000099 (87) International publication number: WO 1991/018032 (28.11.1991 Gazette 1991/27)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 18.05.1990 FI 19900002479 (71) Applicant: NESTE OY SF-02150 Espoo (FI)	(72) Inventors: BERGSTRÖM, Christer SF-02170 Espoo (FI) PUROPAASI, Markku SF-06400 Porvoo (FI) VESTBERG, Torvald SF-06100 Porvoo (FI) LEHTINIEMI, Ismo SF-06150 Porvoo (FI) (74) Representative: Lamb, John Baxter, et al  MARKS & CLERK, 57-60 Lincoln's Inn Fields London WC2A 3LS London WC2A 3LS (GB)