COATING COMPOSITION DISPERSION, AQUEOUS COMPOSITE-PARTICLE DISPERSION, AND PROCESS FOR PRODUCING AQUEOUS COMPOSITE-PARTICLE DISPERSION

WIPO Patent Application WO/2018/030443

A1

A coating composition dispersion that comprises: at least one aqueous composite-particle dispersion (C) which comprises an aqueous medium comprising water and composite particles dispersed in the aqueous medium, the composite particles comprising particles (A) and a polymer layer (B) which covers at least some of the surface of the particles (A) and containing phosphorus atoms in an amount of 0.12 mass% or smaller with respect to the total mass of the composite particles; and an aqueous resin dispersion (D). In the coating composition dispersion, the solid mass ratio of the aqueous composite-particle dispersion (C) to the aqueous resin dispersion (D) is (solid mass of component (C))/(solid mass of component (D)) = 100/0 to 1/99. The coating composition dispersion has a weatherability improvement value represented by the expression |Δb0-Δb|/(Δb0+Δb) of 0.15 or higher, wherein Δb is the color difference of a coating film formed from the coating composition dispersion and Δb0 is the color difference of a coating film formed from the aqueous resin dispersion (D).

YAMAUCHI TOYOAKI (JP)
SASAKI MEGUMI (JP)
YOSHINUMA TOMOHARU (JP)

PCT/JP2017/028852

February 15, 2018

August 08, 2017

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ASAHI CHEMICAL IND (JP)

C09D201/00; C08F2/22; C09D5/02; C09D133/00; C09D157/04; C09D157/06

JP2005054166A	2005-03-03
JP2003147278A	2003-05-21
JP2008280522A	2008-11-20
JP2014194035A	2014-10-09
JPS63312369A	1988-12-20
JP2005211856A	2005-08-11
JP2001526726A	2001-12-18
JP2011219656A	2011-11-04
JP2014031457A	2014-02-20

See also references of EP 3498794A4

INABA, Yoshiyuki et al. (JP)

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