(19)

(11)

EP 0 839 225 A1

(12)

(43) Date of publication: 06.05.1998 Bulletin 1998/19 (21) Application number: 95944321.0 (22) Date of filing: 12.12.1995

(51) International Patent Classification (IPC):  D06P 1/ 673( . ) D06P 3/ 872( . ) D06P 3/ 82( . ) (86) International application number: PCT/US1995/016025 (87) International publication number: WO 1996/018767 (20.06.1996 Gazette 1996/28)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 13.12.1994 US 19940355711 (71) Applicant: HOECHST CELANESE CORPORATION Somerville, NJ 08876-1258 (US)	(72) Inventors: CHAMBERS, Thomas, Van Rock Hill, SC 29732 (US) FEUCHTNER,Christine 74385 Pleidelsheim (DE) (74) Representative: De Minvielle-Devaux, Ian Benedict Peter  CARPMAELS & RANSFORD 43, Bloomsbury Square London WC1A 2RA London WC1A 2RA (GB)