(19)

(11)

EP 0 932 591 A1

(12)

(43) Date of publication: 04.08.1999 Bulletin 1999/31 (21) Application number: 97926554.0 (22) Date of filing: 02.05.1997

(51) International Patent Classification (IPC):  C06B 23/ 00( . ) C06B 25/ 34( . ) (86) International application number: PCT/US1997/008332 (87) International publication number: WO 1998/016485 (23.04.1998 Gazette 1998/16)

(84) Designated Contracting States: DE FR GB NL SE (30) Priority: 15.10.1996 US 19960028540P (71) Applicant: EASTMAN CHEMICAL COMPANY Kingsport, TN 37660 (US)	(72) Inventor: DAWSON, Ralph, Edward Kingsport, TN 37664 (US) (74) Representative: Wibbelmann, Jobst, Dr., Dipl.-Chem.  Wuesthoff & Wuesthoff, Patent- und Rechtsanwälte, Schweigerstrasse 2 81541 München 81541 München (DE)