(19)

(11)

EP 0 190 346 A1

(12)

(43) Date of publication: 13.08.1986 Bulletin 1986/33 (21) Application number: 85905137.0 (22) Date of filing: 05.08.1985

(51) International Patent Classification (IPC):  C04B 35/ 00( . ) C22C 29/ 00( . ) C22C 29/ 06( . ) C22C 29/ 12( . ) C22C 29/ 16( . ) C22C 1/ 05( . ) C22C 29/ 02( . ) C22C 29/ 08( . ) C22C 29/ 14( . ) C22C 29/ 18( . ) (86) International application number: PCT/US1985/001458 (87) International publication number: WO 1986/001196 (27.02.1986 Gazette 1986/05)

(84) Designated Contracting States: BE DE FR GB IT NL (30) Priority: 08.08.1984 US 19840638813 (71) Applicant: THE DOW CHEMICAL COMPANY Midland Michigan 48640-1967 (US)	(72) Inventors: RUSSELL, Patrick, M. Freeland, MI 48623 (US) KURFMAN, Virgil, B. Midland, MI 48640 (US) McDONALD, Robert, R. Traverse City, MI 49684 (US) (74) Representative: Burford, Anthony Frederick, et al  W.H. Beck, Greener & Co. 7 Stone Buildings Lincoln's Inn London WC2A 3SZ London WC2A 3SZ (GB)