(19)

(11)

EP 0 758 308 A1

(12)

(43) Date of publication: 19.02.1997 Bulletin 1997/08 (21) Application number: 95913945.0 (22) Date of filing: 10.04.1995

(51) International Patent Classification (IPC):  C04B 18/ 08( . ) C04B 18/ 10( . ) (86) International application number: PCT/NL1995/000133 (87) International publication number: WO 1995/027685 (19.10.1995 Gazette 1995/45)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI NL PT (30) Priority: 08.04.1994 NL 19940000564 (71) Applicant: N.V. Kema NL-6812 AR Arnhem (NL)	(72) Inventor: CORNELISSEN, Hendrikus, Arnoldus, Wilhelmus NL-6865 TC Doorwerth (NL) (74) Representative: Prins, Hendrik Willem, et al  Arnold & Siedsma, Advocaten en Octrooigemachtigden, Sweelinckplein 1 2517 GK Den Haag 2517 GK Den Haag (NL)