(19)

(11)

EP 2 651 851 A2

(12)

(88) Date of publication A3: 12.07.2012 (43) Date of publication: 23.10.2013 Bulletin 2013/43 (21) Application number: 11791239.4 (22) Date of filing: 18.11.2011

(51) International Patent Classification (IPC):  C04B 33/24(2006.01) B32B 18/00(2006.01) (86) International application number: PCT/EP2011/070480 (87) International publication number: WO 2012/066132 (24.05.2012 Gazette 2012/21)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 19.11.2010 EP 10290617 (71) Applicant: Imerys Ceramics France 75007 Paris (FR)	(72) Inventors: GASGNIER, Gilles F-87170 Isle (FR) RAVAGNANI, Christian F-87000 Limoges (FR) (74) Representative: Rushton, David John  Haseltine Lake LLP Redcliff Quay 120 Redcliff Street Bristol BS1 6HU Bristol BS1 6HU (GB)