(19)

(11)

EP 0 618 938 A1

(12)

(43) Date of publication: 12.10.1994 Bulletin 1994/41 (21) Application number: 92924937.0 (22) Date of filing: 09.12.1992

(51) International Patent Classification (IPC):  C08F 8/ 00( . ) C08F 8/ 46( . ) C08F 8/ 14( . ) C08J 3/ 24( . ) (86) International application number: PCT/NO1992/000194 (87) International publication number: WO 1993/013161 (08.07.1993 Gazette 1993/16)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE (30) Priority: 23.12.1991 NO 19910005081 (71) Applicant: NORSK HYDRO A/S N-0240 Oslo 2 (NO)	(72) Inventors: DAHL, Roger S-444 46 Stenungsund (SE) PEDERSEN, Steinar N-3712 Skien (NO) MARTINSEN, Anita N-3900 Porsgrunn (NO) SKJELLAUG, Per N-3923 Skjelsvik (NO) (74) Representative: Bleukx, Luc  P.O. Box 2 NL-4540 AA Sluiskil NL-4540 AA Sluiskil (NL)