Laminated coating film and coated article

Patent metadata

Field	Value
Publication number	US-10071396-B2
Application number	US-201314421417-A
Country	US
Kind code	B2
Filing date	Mar 11, 2013
Priority date	Aug 28, 2012
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A laminated coating film ( 2 ) includes a metallic base layer ( 4 ) and a color clear layer 5 , and produces a target color with the metallic base layer 4 and the color clear layer ( 5 ). The laminated coating film ( 2 ) is designed to have high chroma at the highlight, and further to provide an appearance of denseness. To address this, the laminated coating film satisfies the following formula (1):

( R H(P) /R H(OA) )>60  (1)

where R H(P) represents a highlight reflectance of light of the target color, and R H(OA) represents an average highlight reflectance of light in a wavelength range outside a hue range of the target color.

First claim

The invention claimed is:

1. A laminated coating film comprising:
a metallic base layer; and
a color clear layer, the metallic base layer and the color clear layer allowing the laminated coating film to produce a red color as a target color, wherein
the metallic base layer contains a bright material and a pigment,
the color clear layer contains the pigment,
a reflectance measured with reference to a reflectance of a standard white plate at a light incidence angle of 45 degrees and a light reception angle of +30 degrees is defined as a highlight reflectance,
when a hue range is indicated by dividing a Munsell hue circle into one hundred sectors with a hue of the target color set at a median value of the Munsell hue circle, and increasing a hue number to +50 in a counterclockwise direction while decreasing the hue number to −50 in a clockwise direction, a range from −25 to +25 corresponds to a hue range of the target color,
the laminated coating film satisfies the following formula (1):
( R H(P) /R H(OA) )>60,

where R H(P) represents a highlight reflectance of light of the target color, and R H(OA) represents an average highlight reflectance of light in a wavelength range outside the hue range,
a reflectance measured with reference to a reflectance of the standard white plate at the light incidence angle of 45 degrees and a light reception angle of −30 degrees is defined as a shade reflectance,
a reflectance measured with reference to a reflectance of the standard white plate at the light incidence angle of 45 degrees and a light reception angle of 0 degree is defined as a face reflectance,
a difference (R 1BC H(P) −R 1BC S(P) ) between a highlight reflectance R 1BC H(P) of the metallic base layer and a shade reflectance R 1BC S(P) of the metallic base layer is greater than or equal to 90%, and a face reflectance R 1BC F(P) of the metallic base layer is equal to or lower than 30%, where R 1BC H(P) , R 1BC S(P) , and R 1BC F(P) represent reflectances of light of the target color,
the laminated coating film further satisfies the following formula (5):
R 1BC H(O-MAX) ×( T 2BC (O-MAX) /100) 2 <7,

where R 1BC H(O-MAX) represents a maximum highlight reflectance of the metallic base layer in the wavelength range outside the hue range, and is higher than or equal to 19.2% and equal to or lower than 39.9%, and T 2BC (O-MAX) represents a light transmittance of the color clear layer at a wavelength of light having the maximum highlight reflectance,
a transmittance T 2BC (P) of light of the target color through the color clear layer is higher than or equal to 91%, and
an average transmittance T 2BC (OA) of light in the wavelength range outside the hue range is higher than or equal to 28% and equal to or lower than 50%.

2. The laminated coating film of claim 1 , wherein
a reflectance measured with reference to a reflectance of the standard white plate at the light incidence angle of 45 degrees and a light reception angle of −30 degrees is defined as a shade reflectance, and
the laminated coating film further satisfies the following formula (2):
( R H(P) /R H(OA) )×( R H(P) −R S(P) )×1/100>30,

where R S(P) represents a shade reflectance of light of the target color.

3. The laminated coating film of claim 2 , wherein
a reflectance measured with reference to a reflectance of the standard white plate at the light incidence angle of 45 degrees and a light reception angle of 0 degree is defined as a face reflectance, and
the laminated coating film further satisfies the following formula (3):
( R H(P) /R H(OA) )×( R H(P) −R S(P) )×(1 /R F(P) )×(1/100)≥2,

where R F(P) represents a phase reflectance of light of the target color.

4. The laminated coating film of claim 3 , wherein
the laminated coating film further satisfies the following formula (4):
( R H(P) /R H(OA) )×( R H(P) −R S(P) )×(1 /R F(P) )×(1/100)>8.

5. The laminated coating film of claim 1 , wherein
the reflectance difference (R 1BC H(P) −R 1BC S(P) ) of the metallic base layer is greater than or equal to 150%.

6. The laminated coating film of claim 5 , wherein
the reflectance difference (R 1BC H(P) −R 1BC S(P) ) of the metallic base layer is greater than or equal to 170%.

7. The laminated coating film of claim 1 , wherein
the face reflectance R 1BC F(P) of the metallic base layer is equal to or lower than 25%.

8. The laminated coating film of claim 1 , further comprising:
a top clear layer on the color clear layer.

9. A coated article comprising:
the laminated coating film of claim 1 .

Assignees

• Mazda Motor

Inventors

• Nakano Sakura
• Kubota Hiroshi

Classifications

• B05D7/572

  all layers being cured or baked together · CPC title

• B05D2202/10

  based on Fe · CPC title

• G02B5/26

  Reflecting filters (G02B5/28 takes precedence) · CPC title

• G01J3/522

  circular colour charts · CPC title

• B05D5/06 Primary

  to obtain multicolour or other optical effects (B05D5/02 takes precedence) · CPC title