(19)

(11)

EP 1 102 727 A1

(12)

(43) Date of publication: 30.05.2001 Bulletin 2001/22 (21) Application number: 99937716.1 (22) Date of filing: 30.07.1999

(51) International Patent Classification (IPC)7: C03C 27/04, C03C 17/42, C03C 17/38, B32B 17/10, C03C 27/12, B60J 10/00 (86) International application number: PCT/US9917/416 (87) International publication number: WO 0006/512 (10.02.2000 Gazette 2000/06)

(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: 31.07.1998 US 94800 P 30.07.1999 US 364644 (71) Applicant: PPG Industries Ohio, Inc. Cleveland, OH 44111 (US)	(72) Inventors: FREEMAN, Glenn, E. Tarentum, PA 15084 (US) YEH, Thomas Pittsburgh, PA 15214 (US) CLAAR, James, A. Apollo, PA 15613 (US) (74) Representative: Sternagel, Fleischer, Godemeyer & PartnerPatentanwälte  An den Gärten 7 51491 Overath 51491 Overath (DE)