Title:
ORGANICALLY COATED STEEL SHEET EXCELLENT IN CORROSION RESISTANCE
Document Type and Number:
Japanese Patent JP3271241
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve corrosion resistance without incorporating hexavalent Cr into a coating film by forming a polymer chelating agent-base coating film in a specified thickness on the surface of a Zn or Al plated steel sheet and forming an org. resin coating film or an org. composite silicate coating film on the polymer chelating agent-base coating film.
SOLUTION: The thickness of the polymer chelating agent-base coating film is 0.01-5 μm. The polymer chelating agent is, e.g. a chelating agent having alkylenephosphoric acid groups as N-substituents bonded to N atoms of a polyamino compd. obtd. by copolymerizing polyamines with a compd. represented by the formula, wherein X is epoxy or CHO, Y is S, O or N-R' (R' is 1-4C alkyl), Z is epoxy, CHO or H, R1 and R2 are each H or 1-60C alkyl, R1 and R2 may be the same or different, (n) is an integer of 0-5 and (m) is a positive integer.
Inventors:
Naoto Yoshimi
Kenichi Sasaki
Yoshiharu Sugimoto
Masaru Sagiyama
Kenichi Sasaki
Yoshiharu Sugimoto
Masaru Sagiyama
Application Number:
JP34586997A
Publication Date:
April 02, 2002
Filing Date:
December 01, 1997
Export Citation:
Assignee:
Nippon Steel Tube Co., Ltd.
International Classes:
C23C22/00; B05D7/14; C09D125/18; (IPC1-7): C23C22/00; B05D7/14; C09D125/18
Domestic Patent References:
| JP11158647A | ||||
| JP11158649A | ||||
| JP11128830A | ||||
| JP11131253A | ||||
| JP115061A | ||||
| JP115062A | ||||
| JP11166151A | ||||
| JP5443142A |
Attorney, Agent or Firm:
Masatoshi Tomabechi
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