AQUEOUS COATING COMPOSITION - KANSAI PAINT CO LTD

Title:

AQUEOUS COATING COMPOSITION

Document Type and Number:

WIPO Patent Application WO/2007/126134

Kind Code:

A1

Abstract:

Disclosed is an aqueous coating composition comprising 10 to 80 parts by mass of an emulsion resin (A), 0.01 to 20 parts by mass of a viscosity modifier (B) and 10 to 100 parts by mass of a hydrophobic solvent (C). The emulsion resin (A) has a core/shell-type double-layered structure having a core and a shell, wherein the core comprises a copolymer (I) made of, as copolymerization components, 0.1 to 30% by mass of a polymerizable unsaturated monomer having two or more polymerizable unsaturated groups in the molecule and 70 to 99.9% by mass of a polymerizable unsaturated monomer having one polymerizable unsaturated group in the molecule, and the shell comprises a copolymer (II) made of, as copolymerization components, 5 to 50% by mass of a hydrophobic polymerizable unsaturated monomer and 50 to 95% by mass of other polymerizable unsaturated monomer. In the emulsion resin (A), the ratio between the solid content of the copolymer (I) and the solid content of the copolymer (II) (copolymer (I)/copolymer (II)) is 10/90 to 90/10. The aqueous coating composition can form a coating film having less metallic unevenness and having excellent flip-flop property and smoothness.

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Inventors:

IIDA TADASHI (JP)
MATSUNO YOSHIZUMI (JP)
NAKAO YASUSHI (JP)

Application Number:

PCT/JP2007/059427

Publication Date:

November 08, 2007

Filing Date:

April 26, 2007

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Assignee:

KANSAI PAINT CO LTD (JP)
IIDA TADASHI (JP)
MATSUNO YOSHIZUMI (JP)
NAKAO YASUSHI (JP)

International Classes:

C09D157/00; B05D1/36; B05D7/24; C09D5/02; C09D7/47; C09D125/00; C09D133/02; C09D133/24; C09D167/00

Domestic Patent References:

WO2006009219A1

2006-01-26

Foreign References:

JP2003292937A	2003-10-15
JP2005343966A	2005-12-15
JPH07207220A	1995-08-08
JP2000154204A	2000-06-06
JPH08245913A	1996-09-24
JP2004525995A	2004-08-26
JP2006176618A	2006-07-06

Attorney, Agent or Firm:

ODAJIMA, Heikichi et al. (Nippon Jitensha Bldg.9-15, Akasaka 1-chom, Minato-ku Tokyo 52, JP)

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