(19)

(11)

EP 0 406 265 A1

(12)

(43) Date of publication: 09.01.1991 Bulletin 1991/02 (21) Application number: 89903374.0 (22) Date of filing: 24.01.1989

(51) International Patent Classification (IPC):  C22C 32/ 00( . ) B22F 3/ 15( . ) C22C 29/ 00( . ) C22C 29/ 10( . ) C22C 29/ 14( . ) B22F 3/ 14( . ) C22C 1/ 05( . ) C22C 29/ 06( . ) C22C 29/ 12( . ) C22C 29/ 16( . ) (86) International application number: PCT/US1989/000171 (87) International publication number: WO 1990/008612 (09.08.1990 Gazette 1990/19)

(84) Designated Contracting States: BE CH DE FR GB IT LI NL SE (71) Applicant: THE DOW CHEMICAL COMPANY Midland, Michigan 48640 (US)	(72) Inventors: PECHENIK, Alexander Los Angeles, CA 90064 (US) MCDONALD, Robert, R. Traverse City, MI 48684 (US) PYZIK, Aleksander, J. Midland, MI 48640 (US) SNYDER, Irving, G., Jr. Sanford, MI 48657 (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)