(19)

(11)

EP 0 988 358 A1

(12)

(43) Date of publication: 29.03.2000 Bulletin 2000/13 (21) Application number: 97928192.0 (22) Date of filing: 12.06.1997

(51) International Patent Classification (IPC)7: C10M 173/02 // (C10M173/02, 133:06, 133:06, 133:16, 135:10, 137:02, 145:14), C10M145:36, C10N40:00 (86) International application number: PCT/EP9703/080 (87) International publication number: WO 9856/881 (17.12.1998 Gazette 1998/50)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV RO SI (71) Applicant: Laporte ESD Limited London W1H 9AB (GB)	(72) Inventors: SCHOBER, Klaus, Dr. 67259 Heuchelheim (DE) HERMANN, Frank 69207 Sandhausen (DE) (74) Representative: Maiwald, Walter, Dr. Dipl.-Chem.  Maiwald GmbH,Elisenhof,Elisenstrasse 3 80335 München 80335 München (DE)