(19)

(11)

EP 1 928 652 A2

(12)

(88) Date of publication A3: 28.06.2007 (43) Date of publication: 11.06.2008 Bulletin 2008/24 (21) Application number: 06813785.0 (22) Date of filing: 25.08.2006

(51) International Patent Classification (IPC):  B32B 9/00(2006.01) C04B 12/02(2006.01) B32B 5/16(2006.01) C04B 28/14(2006.01) (86) International application number: PCT/US2006/033297 (87) International publication number: WO 2007/027530 (08.03.2007 Gazette 2007/10)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 31.08.2005 US 217039 20.07.2006 US 490150 (71) Applicant: UNITED STATES GYPSUM COMPANY Chicago, IL 60661-3637 (US)	(72) Inventors: BLACKBURN, David, R. Barrington, IL 60010 (US) LIU, Qingxia Vernon Hills, IL 60061 (US) SHAKE, Michael, P. Johnsburg, IL 60050 (US) (74) Representative: Pontet, Bernard et al Pontet Allano & Associés SELARL, 25, rue Jean-Rostand, Parc Club Orsay Université 91893 Orsay Cédex 91893 Orsay Cédex (FR)