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公开(公告)号：EP4296056A1
公开(公告)日：2023-12-27
申请号：EP22756327.7
申请日：2022-02-21
发明人： ISHIKAWA, Tomoyuki , YAMAGUCHI, Kohei , YAMANAKA, Eiji , JIZODO, Azusa , ARAKI, Yoshito , JINNO, Yohei
摘要： An object of the present invention is to provide a multi-layer coating film having at least a clear coating film and a base coating film and having good chipping resistance, and preferably to provide a multi-layer coating film further having good designability. The multi-layer coating film of the present invention is a multi-layer coating film comprising a substrate, a base layer formed thereon, and a clear layer formed on the base layer, wherein the base layer comprises a luster pigment, wherein the base layer has an erosion index of 45 µm 2 /g or less where the erosion index is a value obtained by multiplying an erosion rate of the base layer by a thickness of the base layer, and wherein the erosion rate of the base layer is measured using a micro slurry jet erosion method at a projection power at which an erosion rate with respect to a silicon wafer is 0.635 µm/g.
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公开(公告)号：EP4431576A1
公开(公告)日：2024-09-18
申请号：EP23899116.0
申请日：2023-07-10
IPC分类号： C09D133/14 , C09D175/04 , C09D7/20
CPC分类号： C09D133/14 , C09D7/20 , C09D175/04
摘要： Provided is a clear coating composition from which a coating film superior in color shift and appearance can be obtained. A clear coating composition comprising: a hydroxy group-containing acrylic resin (A); a polyisocyanate compound (B); and an organic solvent (C), wherein the hydroxy group-containing acrylic resin (A) includes a primary hydroxy group-containing acrylic resin (A1) and a secondary hydroxy group-containing acrylic resin (A2); the primary hydroxy group-containing acrylic resin (A1) has a weight average molecular weight of 6,000 or less; the secondary hydroxy group-containing acrylic resin (A2) has a weight average molecular weight of 6,000 or more; the organic solvent (C) includes a ketone compound having 7 or more carbon atoms (C1); and the clear coating composition has a solid concentration at a time of application of 55% by mass or more.
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