(19)

(11)

EP 1 023 380 A1

(12)

(43) Date of publication: 02.08.2000 Bulletin 2000/31 (21) Application number: 98953618.0 (22) Date of filing: 16.10.1998

(51) International Patent Classification (IPC)7: C08K 5/521, C08K 5/5398 (86) International application number: PCT/US9821/898 (87) International publication number: WO 9919/395 (22.04.1999 Gazette 1999/16)

(84) Designated Contracting States: DE FR GB NL (30) Priority: 16.10.1997 US 62435 P 13.10.1998 US 172578 (71) Applicant: GREAT LAKES CHEMICAL CORPORATION West LafayetteIndiana 47996 (US)	(72) Inventors: RAO, Arvind, M. Monmouth Junction, NJ 08852 (US) KOTAK, Vijay Plainsboro, NJ 08536 (US) PLACEK, Douglas, G. Yardley, PA 19067 (US) (74) Representative: Atkinson, Peter Birch et al MARKS & CLERK,Sussex House,83-85 Mosley Street Manchester M2 3LG Manchester M2 3LG (GB)