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Title:
WATER-BASED METALLIC COATING COMPOSITION AND METHOD OF FORMING MULTILAYERED COATING FILM
Document Type and Number:
WIPO Patent Application WO/2007/013558
Kind Code:
A1
Abstract:
A water-based metallic coating composition which retains excellent properties of water-based metallic coating materials, such as coloration, adhesion in re-coating, unsusceptibility to chipping, and wet adhesion, and which, when applied by the two-coat one-bake coating method, gives a coating film less apt to suffer the disordering of brightening-pigment orientation through the application of a clear coating material. The coating film does not change in flip-flop effect and retains the excellent flip-flop effect. Also provided are: a method of two-coat one-bake coating which employs the coating composition; and a multilayered coating film which is obtained from the coating composition and has excellent flip-flop effect. The water-based metallic coating composition comprises a film-forming resin, a hardener, and a brightening pigment, and is characterized in that the film-forming resin comprises an acrylic resin emulsion, the acrylic resin emulsion being one obtained by two-stage emulsion polymerization, the solid resin ingredient in the emulsion having an acid value of 1-30 mg-KOH/g and a hydroxyl value of 10-150 mg-KOH/g, and the emulsion having a particle diameter of 20-140 nm and the hardener is an aqueous hydrophobic-melamine-resin dispersion having a particle diameter of 20-140 nm.

Inventors:
HAYASHI KOUKI (JP)
OHARA KOUICHI (JP)
OGAWA HIDEAKI (JP)
ASAI TOMOHITO (JP)
YONEDA HIROTO (JP)
Application Number:
PCT/JP2006/314898
Publication Date:
February 01, 2007
Filing Date:
July 27, 2006
Export Citation:
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Assignee:
NIPPON PAINT CO LTD (JP)
HAYASHI KOUKI (JP)
OHARA KOUICHI (JP)
OGAWA HIDEAKI (JP)
ASAI TOMOHITO (JP)
YONEDA HIROTO (JP)
International Classes:
C09D133/00; B05D1/36; B05D5/06; B05D7/24; C09D5/02; C09D5/29; C09D151/00; C09D161/28
Domestic Patent References:
WO2006054611A12006-05-26
WO1996033814A11996-10-31
Foreign References:
JPH02255871A1990-10-16
JP2003286434A2003-10-10
JPH0741729A1995-02-10
JPS63193968A1988-08-11
JPH0368478A1991-03-25
JPH0292974A1990-04-03
JPH08209059A1996-08-13
JP2001240791A2001-09-04
JPH08199114A1996-08-06
JP2001131488A2001-05-15
JP2002080790A2002-03-19
JP2000303006A2000-10-31
JP2001303461A2001-10-31
JPS5399232A1978-08-30
JP2004315623A2004-11-11
JP2002308993A2002-10-23
JPS63193968A1988-08-11
JPH0741729A1995-02-10
JP2004332110A2004-11-25
JP2004349019A2004-12-09
JP2000303006A2000-10-31
Other References:
K.W., SUH; D. H. CLARKE, J. POLYMER. SCI., vol. A-1, no. 5, 1967, pages 1671
See also references of EP 1908807A4
Attorney, Agent or Firm:
KAWAMIYA, Osamu et al. (IMP Building 3-7, Shiromi 1-chome, Chuo-ku, Osaka-sh, Osaka 01, JP)
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