(19)

(11)

EP 2 545 563 A1

(12)

(43) Date of publication: 16.01.2013 Bulletin 2013/03 (21) Application number: 11752934.7 (22) Date of filing: 09.03.2011

(51) International Patent Classification (IPC):  H01F 1/01(2006.01) (86) International application number: PCT/IB2011/050982 (87) International publication number: WO 2011/111004 (15.09.2011 Gazette 2011/37)

(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: 11.03.2010 EP 10156184 (71) Applicant: BASF SE 67056 Ludwigshafen (DE)	(72) Inventors: BRÜCK, Ekkehard NL-2628AH Delft (NL) OU, Zhiqiang NL-2624 SG Delft (NL) ZHANG, Lian NL - 2612 VD Delft (NL) LUANA, Caron NL-2611 JB Delft (NL)