(19)

(11)

EP 1 001 870 A2

(12)

(88) Date of publication A3: 15.04.1999 (43) Date of publication: 24.05.2000 Bulletin 2000/21 (21) Application number: 98942541.8 (22) Date of filing: 13.07.1998

(51) International Patent Classification (IPC)7: B29C 33/00 (86) International application number: PCT/EP9804/329 (87) International publication number: WO 9907/532 (18.02.1999 Gazette 1999/07)

(84) Designated Contracting States: AT DE FR GB IT NL (30) Priority: 08.08.1997 GB 9716738 (71) Applicant: Ciba Specialty Chemicals Holding Inc. 4057 Basel (CH)	(72) Inventor: BEZZOLA, Alberto CH-4144 Arlesheim (CH)