(19)

(11)

EP 0 929 506 A1

(12)

(43) Date of publication: 21.07.1999 Bulletin 1999/29 (21) Application number: 97939335.0 (22) Date of filing: 13.08.1997

(51) International Patent Classification (IPC):  C07B 61/ 00( . ) C07C 37/ 20( . ) C07C 37/ 00( . ) C07C 39/ 215( . ) (86) International application number: PCT/US1997/011550 (87) International publication number: WO 1998/011043 (19.03.1998 Gazette 1998/11)

(84) Designated Contracting States: BE CH DE FR GB IT LI NL (30) Priority: 13.09.1996 US 19960713335 (71) Applicant: THE DOW CHEMICAL COMPANY Midland, Michigan 48674 (US)	(72) Inventors: CLEMENT, Katherine, S. Lake Jackson, TX 77566 (US) TASSET, Emmett, L. Lake Jackson, TX 77566 (US) WALKER, Louis, L. Clute, TX 77531 (US) (74) Representative: Casalonga, Axel, et al  BUREAU D.A. CASALONGA - JOSSE Morassistrasse 8 80469 München 80469 München (DE)