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Title:
SURFACE-TREATED METAL SHEETS EXCELLENT IN PRESS DRAGGING RESISTANCE AND COIL DEFORMATION RESISTANCE AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2002/057510
Kind Code:
A1
Abstract:
A surface-treated metal sheet having a coating film formed in an amount of 0.3 to 5.0 g/m?2¿ from a water-based organic/inorganic composite coating material which comprises: a lubricant comprising either (1) a polyolefin wax dispersion having a molecular weight of 6,000 to 15,000 or (2) a combination of a polyolefin wax dispersion (A) having a molecular weight of 6,000 to 15,000 and a polyolefin wax dispersion (B) having a molecular weight of 1,000 to 5,000; and colloidal silica of 5 to 35 wt.% on a solid basis. Also provided is a surface-treated metal sheet which has a first layer which is a coating film formed in an amount of 0.05 to 0.3 g/m?2¿ on a dry basis from a water-based organic/inorganic composite comprising a polyolefin wax dispersion having a molecular weight of 6,000 to 15,000 and a second layer which is a coating film formed in an amount of 0.5 to 5.0 g/m?2¿ on a dry basis from a water-based organic/inorganic composite comprising colloidal silica of 5 to 35 wt.% on a solid basis. The water-based organic/inorganic composite coating material with which these surface-treated metal sheets can be produced is further provided.

Inventors:
Yoshida, Kengo (C/O NIPPON STEEL CORPORATION KIMITSU WORKS 1, Kimitsu Kimitsu-shi, Chiba, 299-1193, JP)
Morishita, Atsushi (C/O NIPPON STEEL CORPORATION KIMITSU WORKS 1, Kimitsu Kimitsu-shi, Chiba, 299-1193, JP)
Miyauchi, Yujiro (C/O NIPPON STEEL CORPORATION KIMITSU WORKS 1, Kimitsu Kimitsu-shi, Chiba, 299-1193, JP)
Takahashi, Akira (C/O NIPPON STEEL CORPORATION KIMITSU WORKS 1, Kimitsu Kimitsu-shi, Chiba, 299-1193, JP)
Application Number:
PCT/JP2002/000359
Publication Date:
July 25, 2002
Filing Date:
January 18, 2002
Export Citation:
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Assignee:
NIPPON STEEL CORPORATION (6-3 Otemachi 2-chome Chiyoda-ku, Tokyo, Tokyo, 100-8071, JP)
International Classes:
C23C26/00; C23C30/00; (IPC1-7): C23C26/00
Foreign References:
JPH09267073A1997-10-14
Attorney, Agent or Firm:
Ishida, Takashi (A. AOKI, ISHIDA & ASSOCIATES Toranomon 37 Mori Bldg. 5-, Toranomon 3-chome Minato-ku Tokyo, 105-8423, JP)
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