Patent ID: 9737906
Date: 2017-08-22
CPC Classifications: B05D,C09D

Claim:
1. A process for forming a multi-layer coating film comprising the steps of: (1) applying a metallic base coating composition to a coating substrate to form a metallic base coating film, wherein the metallic base coating composition comprises a coloring pigment and a luster pigment, (2) applying a color base coating composition to the metallic base coating film obtained by the step (1) to form a color base coating film, wherein the color base coating composition comprises a coloring pigment and does not comprises a luster pigment, (3) applying a clear coating composition to the color base coating film obtained by the step (2) to form a clear coating film, and (4) simultaneously heating and curing the metallic base coating film, the color base coating film and the clear coating film formed in the steps (1), (2) and (3), respectively, to form a multi-layer coating film, wherein a single layer of the metallic base coating film obtained by heating and curing of the metallic base coating film of step (1) has light reflectance of from 45 to 50% in a wavelength range of 650 to 700 nm and light reflectance of not more than 20% in wavelength ranges of 410 to 440 nm and 510 to 590 nm, and a single layer of the color base coating film obtained by heating and curing of the color base coating film of step (2) has light transmittance of from 50 to 70% in a wavelength range of 400 to 700 nm, light transmittance of from 88 to 92% in a wavelength range of 650 to 700 nm and light transmittance of from 20 to 60% in wavelength ranges of 410 to 440 nm and 510 to 590 nm.