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1. (WO2018135209) AQUEOUS COATING COMPOSITION AND METHOD FOR FORMING MULTILAYERED COATING FILM

Pub. No.:    WO/2018/135209    International Application No.:    PCT/JP2017/045381
Publication Date: Fri Jul 27 01:59:59 CEST 2018 International Filing Date: Tue Dec 19 00:59:59 CET 2017
IPC: C09D 151/08
B05D 1/36
B05D 3/02
B05D 7/24
C09D 7/40
C09D 167/00
Applicants: KANSAI PAINT CO., LTD.
関西ペイント株式会社
Inventors: IMAI, Takahiro
今井 崇裕
Title: AQUEOUS COATING COMPOSITION AND METHOD FOR FORMING MULTILAYERED COATING FILM
Abstract:
Provided are: an aqueous coating composition which is capable of giving coating films having excellent chipping resistance without lowering the finish; and a method for forming a multilayered coating film. The aqueous coating composition comprises an acrylic-modified polyester resin (A) comprising an acrylic moiety and a polyester moiety, a crosslinking agent (B), and an epoxy phosphoric acid ester compound (C), wherein the acrylic-modified polyester resin (A) contains a polyoxyalkylene-group-containing unsaturated monomer having a weight-average molecular weight of 400 or higher as a monomer component of the acrylic moiety and the polyester moiety is configured of components, 50 mass% or more of which is accounted for by a C6 or higher compound, the content of the epoxy phosphoric acid ester compound (C) being 0.1-10 parts by mass per 100 parts by mass of the sum of the solid components of (A) and (B).