(19)

(11)

EP 1 129 148 A1

(12)

(43) Date of publication: 05.09.2001 Bulletin 2001/36 (21) Application number: 99958894.0 (22) Date of filing: 12.11.1999

(51) International Patent Classification (IPC)7: C09K 7/06 (86) International application number: PCT/US9926/639 (87) International publication number: WO 0027/945 (18.05.2000 Gazette 2000/20)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 12.11.1998 US 190783 (71) Applicant: M-I L.L.C. Houston, TX 77002 (US)	(72) Inventor: PATEL, Arvind, D. Houston, TX 77083 (US) (74) Representative: Bongiovanni, Simone (IT) et al Studio Torta S.r.lVia Viotti 9 I-10121 Torino I-10121 Torino (IT)