(19)

(11)

EP 1 377 635 A2

(12)

(88) Date of publication A3: 31.10.2002 (43) Date of publication: 07.01.2004 Bulletin 2004/02 (21) Application number: 02721203.4 (22) Date of filing: 26.02.2002

(51) International Patent Classification (IPC)7: C08K 5/49, C08K 5/53, C08K 3/10, C08K 3/04, C09K 21/14 (86) International application number: PCT/US2002/006012 (87) International publication number: WO 2002/068061 (06.09.2002 Gazette 2002/36)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR (30) Priority: 26.02.2001 US 271477 P (71) Applicant: TANDEM PRODUCTS, INC. Minneapolis,Minnesota 55406 (US)	(72) Inventor: TWEET, David, E. Eden Prairie, MN 55344 (US) (74) Representative: McDonough, Jonathan  Urquhart-Dykes & LordTower North CentralMerrion Way Leeds LS2 8PA Leeds LS2 8PA (GB)