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(11)

EP 0 181 377 A1

(12)

(43) Date of publication: 21.05.1986 Bulletin 1986/21 (21) Application number: 85902388.0 (22) Date of filing: 03.05.1985

(51) International Patent Classification (IPC):  C23C 22/ 34( . ) C23C 22/ 68( . ) (86) International application number: PCT/US1985/000797 (87) International publication number: WO 1985/005131 (21.11.1985 Gazette 1985/25)

(84) Designated Contracting States: AT BE DE FR GB IT NL SE (30) Priority: 04.05.1984 US 19840607075 25.04.1985 US 19850725561 (71) Applicant: AMCHEM PRODUCTS, INC. Ambler Pennsylvania 19002 (US)	(72) Inventors: GRIMES, Joseph, E., Jr. Dublin, PA 18917 (US) MELZER, Jeffrey, I. Horsham, PA 19044 (US) (74) Representative: von Kreisler, Alek, Dipl.-Chem., et al  Patentanwälte von Kreisler-Selting-Werner Postfach 10 22 41 D-50462 Köln D-50462 Köln (DE)