(19)

(11)

EP 0 528 867 A1

(12)

(43) Date of publication: 03.03.1993 Bulletin 1993/09 (21) Application number: 91908916.0 (22) Date of filing: 16.04.1991

(51) International Patent Classification (IPC):  C08F 2/ 22( . ) (86) International application number: PCT/US1991/002606 (87) International publication number: WO 1991/017201 (14.11.1991 Gazette 1991/26)

(84) Designated Contracting States: CH DE ES FR GB IT LI NL SE (30) Priority: 08.05.1990 US 19900520699 06.02.1991 US 19910652334 (71) Applicant: THE DOW CHEMICAL COMPANY Midland, Michigan 48640 (US)	(72) Inventors: MAKATI, Ashok, C. Midland, MI 48640 (US) IWAMASA, Robert, T. Midland, MI 48640 (US) (74) Representative: Casalonga, Axel, et al  BUREAU D.A. CASALONGA - JOSSE Morassistrasse 8 D-80469 München D-80469 München (DE)