Title:
STEEL SHEET SURFACE TREATMENT AGENT AND STEEL SHEET WITH COATING FILM THEREOF
Document Type and Number:
WIPO Patent Application WO/2016/208284
Kind Code:
A1
Abstract:
The present invention provides a steel sheet surface treatment agent characterized in containing an aqueous urethane resin composition obtained by dispersing, in an aqueous medium (C), a urethane resin obtained by reacting a urethane prepolymer (A), which has an isocyanate group obtained by reacting a polyol (a1) and a polyisocyanate (a2) containing an aromatic polyisocyanate, with a chain terminator (B) containing an alcohol solvent (b1) with a boiling point in the range of 150-350°C and a number average molecular weight of 500 or less. Said steel sheet surface treatment agent is able to form a coating film with excellent thermal yellowing resistance, chemical resistance and corrosion resistance and capable of preventing deterioration of various kinds of metal substrates.
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Inventors:
MATSUOKA RYUICHI (JP)
OKA YASUTAKA (JP)
NAGAHAMA SADAMU (JP)
OKA YASUTAKA (JP)
NAGAHAMA SADAMU (JP)
Application Number:
PCT/JP2016/063840
Publication Date:
December 29, 2016
Filing Date:
May 10, 2016
Export Citation:
Assignee:
DAINIPPON INK & CHEMICALS (JP)
International Classes:
C23C26/00; C08G18/00; C08G18/10; C08G18/66; C09D5/02; C09D5/08; C09D175/04
Domestic Patent References:
| WO2014045782A1 | 2014-03-27 |
Foreign References:
| JPS6136314A | 1986-02-21 | |||
| JP2013023611A | 2013-02-04 |
Other References:
See also references of EP 3315631A4
Attorney, Agent or Firm:
KONO MICHIHIRO (JP)
Michihiro Kono (JP)
Michihiro Kono (JP)
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