Coating system exhibiting cool dark color

• US 8,822,025 B2
• Filed: 01/31/2008
• Issued: 09/02/2014
• Est. Priority Date: 02/05/2007
• Status: Active Grant

• Current Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: Decker, Eldon L., Jennings, Robert E., Munro, Calum H., Vanier, Noel R.
• Primary Examiner(s): Robinson, Elizabeth A
• Application Number:
  US12/023,423
• Publication Number:
  US 20080187708A1
• Time in Patent Office: 2,406 Days
• Field of Search: 428/323
• US Class Current: 428/323
• CPC Class Codes: B05D 5/061 Special surface effect
• CPC Class Codes: B05D 5/068 achieved by multilayers B05D5/066 takes precedence
• CPC Class Codes: B05D 7/54 No clear coat specified
• CPC Class Codes: C09D 5/004 Reflecting paints; Signal paints
• CPC Class Codes: C09D 7/41 Organic pigments; Organic dyes
• CPC Class Codes: C09D 7/67 Particle size smaller than 100 nm
• CPC Class Codes: Y10T 428/24 Structurally defined web or sheet [e.g., overall dimension, etc.]
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/269 including synthetic resin or polymer layer or component

Abstract

A layered coating composition for use in producing a cool dark coating composition. The coating system includes an IR reflecting layer, having IR-reflective pigments in a resinous binder. A radiation absorbing layer is coated onto the IR reflecting layer. The radiation absorbing layer includes nano-sized pigments dispersed in a resinous binder.

Claims

1. A layered coating system comprising:

a first IR-reflecting layer comprising IR-reflective pigments in a resinous binder; and

a second visible radiation absorbing layer that is transparent to IR radiation, said second layer comprising a plurality of tints in a resinous binder, said tints comprising nano-sized pigments having an average primary particle size of up to 100 nm, wherein at least one of said tints comprises a non-black pigment,

wherein said layered coating system exhibits a jetness value of at least 240.

2. The layered coating system of claim 1, wherein said nano-sized pigments have an average primary particle size of up to 50 nm.

3. The layered coating system of claim 1, wherein said nano-sized pigments have an average primary particle size of up to 30 nm.

4. The layered coating system of claim 1, wherein said tints each have a maximum haze of 10%.

5. The layered coating system of claim 4, wherein said tints each have a maximum haze of 1%.

6. The layered coating system of claim 4, wherein no such tints comprise carbon black pigment.

7. The layered coating system of claim 1, wherein at least one of the tints comprises a dispersant comprising a tri-block copolymer comprising:

(i) a first block comprising an oxirane functional monomer reacted with a carboxylic acid;

(ii) a second block comprising a (meth)acrylic acid alkyl ester; and

(iii) a third block comprising a (meth)acrylic acid alkyl ester, wherein the third block is different from the second block.

8. The layered coating system of claim 1, wherein said tints do not comprise a carbon black pigment.

9. A coating exhibiting a jet black color, wherein:

(a) the coating is deposited from a composition comprising;

(i) a resinous binder; and

(ii) a plurality of tints having a maximum haze of 10% and comprising nano-sized pigments having an average primary particle size of up to 100 nanometers, wherein at least one of the tints comprises a non-black pigment; and

(b) the coating has a jetness value of at least 240.

10. The coating of claim 9, wherein the tints each have a maximum haze of 1%.

11. The coating of claim 10, wherein none of said plurality of tints comprises carbon black.

12. The coating of claim 9, wherein at least one of the tints comprises a dispersant comprising a tri-block copolymer comprising:

(i) a first block comprising an oxirane functional monomer reacted with a carboxylic acid;

(ii) a second block comprising a (meth)acrylic acid alkyl ester; and

(iii) a third block comprising a (meth)acrylic acid alkyl ester, wherein the third block is different from the second block.

13. The coating of claim 9, wherein said tints do not comprise a carbon black pigment.