(19)

(11)

EP 0 898 600 A1

(12)

(43) Date of publication: 03.03.1999 Bulletin 1999/09 (21) Application number: 96920248.0 (22) Date of filing: 16.05.1996

(51) International Patent Classification (IPC):  B01F 17/ 22( . ) C09B 67/ 20( . ) C09D 11/ 00( . ) B01F 17/ 00( . ) C09B 67/ 46( . ) C09D 17/ 00( . ) (86) International application number: PCT/US1996/007078 (87) International publication number: WO 1997/043351 (20.11.1997 Gazette 1997/50)

(84) Designated Contracting States: DE ES GB NL (71) Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY St. Paul, Minnesota 55133-3427 (US)	(72) Inventors: KREPSKI, Larry, R. White Bear Lake, MN 55110 (US) RAO, Prabhakara, S. Maplewood, MN 55119 (US) SMITH, Terrance, P. Woodbury, MN 55125 (US) WILSON, Kenneth, D. Stillwater, MN 55082 (US) KUO, Richard, J. Saint Paul, MN 55119 (US) (74) Representative: VOSSIUS & PARTNER  Siebertstrasse 4 81675 München 81675 München (DE)