(19)

(11)

EP 1 171 492 A1

(12)

(43) Date of publication: 16.01.2002 Bulletin 2002/03 (21) Application number: 99967997.0 (22) Date of filing: 22.12.1999

(51) International Patent Classification (IPC)7: C08F 230/02, C08F 228/02, C08F 8/40, D21H 17/34 (86) International application number: PCT/IB9902/101 (87) International publication number: WO 0059/965 (12.10.2000 Gazette 2000/41)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 06.04.1999 US 286742 06.04.1999 US 286745 (71) Applicant: MINERALS TECHNOLOGIES INC. New York, New York 10174 (US)	(72) Inventors: DRUMMOND, Donald, Kendall Quakertown, PA 18951 (US) WERNETT, Patrick, Clinton Upper Black Eddy, PA 18972 (US) (74) Representative: Bawden, Peter Charles et al Bawden & Associates, 4 The Gatehouse 2 High Street Harpenden, Hertfordshire AL5 2TH Harpenden, Hertfordshire AL5 2TH (GB)