(19)

(11)

EP 0 466 819 A1

(12)

(43) Date of publication: 22.01.1992 Bulletin 1992/04 (21) Application number: 90906586.0 (22) Date of filing: 02.04.1990

(51) International Patent Classification (IPC):  B22D( . ) B22F 9/ 08( . ) C22C 1/ 08( . ) C23C 4/ 12( . ) B22D 23/ 00( . ) C22C 1/ 04( . ) C22F 1/ 08( . ) (86) International application number: PCT/US1990/001737 (87) International publication number: WO 1990/011852 (18.10.1990 Gazette 1990/24)

(84) Designated Contracting States: DE GB (30) Priority: 03.04.1989 US 19890332181 30.03.1990 US 19900501588 (71) Applicant: OLIN CORPORATION Cheshire, CT 06410-0586 (US)	(72) Inventors: MRAVIC, Brian North Haven, CT 06473 (US) WATSON, William, Gary Cheshire, CT 06410 (US) CHESKIS, Harvey, P. North Haven, CT 06473 (US) (74) Representative: Klunker . Schmitt-Nilson . Hirsch  Winzererstrasse 106 D-80797 München D-80797 München (DE)