US 7,393,578 B2
Precoated metal sheet for light reflectors
Kohei Ueda, Futtsu (Japan); Hiroshi Kanai, Futtsu (Japan); Ikuya Inoue, Kimitsu (Japan); and Nobukatsu Komatsu, Tokyo (Japan)
Assigned to Nippon Steel Corporation, Tokyo (Japan)
Appl. No. 10/545,619
PCT Filed Feb. 23, 2004, PCT No. PCT/JP2004/002050
§ 371(c)(1), (2), (4) Date Aug. 15, 2005,
PCT Pub. No. WO2004/076172, PCT Pub. Date Sep. 10, 2004.
Claims priority of application No. 2003-047611 (JP), filed on Feb. 25, 2003; application No. 2003-206052 (JP), filed on Aug. 05, 2003; and application No. 2003-367622 (JP), filed on Oct. 28, 2003.
Prior Publication US 2006/0147673 A1, Jul. 06, 2006
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 15/08 (2006.01); B32B 15/18 (2006.01); B32B 27/20 (2006.01)
U.S. Cl. 428—141  [428/216; 428/421; 428/457] 10 Claims
OG exemplary drawing
 
1. A precoated metal sheet for light reflectors, comprising a metal sheet or plated metal sheet, a visible light reflective undercoat having a thickness of 3 to 30 micrometers provided on at least one surface of the metal sheet or plated metal sheet, and a visible light reflective overcoat having a thickness of 10 to 40 micrometers provided on the visible light reflective undercoat, wherein the visible light reflective undercoat comprises a binder resin and a titanium oxide, a content of the titanium oxide in the visible light reflective undercoat being 40 to 150 parts by weight based on 100 parts by weight of a solid content of the binder resin in the visible light reflective undercoat, and the visible light reflective overcoat comprises a fluororesin-containing binder resin and a titanium oxide, a content of the titanium oxide in the visible light reflective overcoat being 40 to 150 parts by weight based on 100 parts by weight of a solid content of the binder resin in the visible light reflective overcoat.