(19)

(11)

EP 0 060 838 A1

(12)

(43) Date of publication: 29.09.1982 Bulletin 1982/39 (21) Application number: 81901356.0 (22) Date of filing: 18.09.1980

(51) International Patent Classification (IPC):  C07D 213/ 61( . ) C07D 213/ 643( . ) C07D 213/ 64( . ) (86) International application number: PCT/US1980/001226 (87) International publication number: WO 1982/001003 (01.04.1982 Gazette 1982/09)

(84) Designated Contracting States: CH DE FR LI LU NL (71) Applicant: THE DOW CHEMICAL COMPANY Midland Michigan 48640-1967 (US)	(72) Inventor: MALHOTRA, Sudarshan K. Walnut Creek, CA 94598 (US) (74) Representative: Weickmann, Heinrich, Dipl.-Ing.  Patentanwälte Dipl.-Ing. H. Weickmann Dipl.-Phys.Dr. K. Fincke Dipl.-Ing. F.A. Weickmann Dipl.-Chem. B. Huber Dr.-Ing. H. Liska M hlstrasse 22 D-800 D-800 (DE)