Solar reflective coatings systems

• US 8,679,617 B2
• Filed: 11/02/2010
• Issued: 03/25/2014
• Est. Priority Date: 11/02/2010
• Status: Active Grant

• Current Assignee: PRC-DeSoto International, Inc. (Nouryon BV)
• Original Assignee: PRC-DeSoto International, Inc. (Nouryon BV)
• Inventors: Eibon, William E., Dillon, Brian
• Primary Examiner(s): Austin, Aaron S
• Assistant Examiner(s): KHAN, TAHSEEN
• Application Number:
  US12/917,576
• Publication Number:
  US 20120107584A1
• Time in Patent Office: 1,239 Days
• Field of Search: 428/212
• US Class Current: 428/212
• CPC Class Codes: B05D 5/00 Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
• CPC Class Codes: B05D 7/54 No clear coat specified
• CPC Class Codes: C09B 67/0033 Blends of pigments; Mixtured crystals; Solid solutions
• CPC Class Codes: C09B 67/0063 of organic pigments with only macromolecular substances
• CPC Class Codes: C09D 17/003 containing an organic pigment process features in the making of dye stuff preparations C09B67/00
• CPC Class Codes: C09D 17/006 Metal
• CPC Class Codes: C09D 5/004 Reflecting paints; Signal paints
• CPC Class Codes: C09D 5/38 Paints containing free metal not provided for above in groups C09D5/00 - C09D5/36
• CPC Class Codes: C09D 7/41 Organic pigments; Organic dyes
• CPC Class Codes: C09D 7/61 inorganic
• CPC Class Codes: C09D 7/70 characterised by shape, e.g. fibres, flakes or microspheres
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree

Abstract

Disclosed are infrared reflective coating systems. The coating compositions include an infrared transparent pigment and an infrared reflective pigment.

Claims

1. A coating system comprising:

(a) a first coating layer having a CIELAB L* value of no more than 40 and comprising;

(i) a film-forming resin; and

(ii) a visibly absorbing infrared transparent pigment; and

(b) a second coating layer deposited beneath at least a portion of the first coating layer and comprising;

(i) a film-forming resin;

(ii) a thin flake metal or metal alloy infrared reflective pigment; and

(iii) a visibly absorbing infrared transparent pigment,

wherein the first coating layer and the second coating layer have a contrast ratio (L*_second/L*_first) of 0.8;

1 to 1.6;

1;

wherein the coating system has a % total solar reflectance of at least 25%; and

wherein the second coating layer has a % TSR of at least 25%.

2. The coating system of claim 1, wherein the contrast ratio is 1.0 to 1.5:

1.

3. The coating system of claim 1, wherein the contrast ratio is 0.8 to less than 1:

1.

4. The coating system of claim 1, wherein the visibly absorbing infrared transparent pigment is present in an amount of at least 20% by weight, based on the total solids weight of the composition from which the second coating layer is deposited.

5. The coating system of claim 1, wherein the dark IR transparent pigment in the first coating layer comprises a perylene system pigment.

6. The coating system of claim 1, wherein the dark IR transparent pigment in the first coating layer comprises a perylene system pigment.

7. The coating system of claim 1, wherein the second coating layer has an L *value of no more than 30.

8. The coating system of claim 7, wherein the second coating layer has an L* value of 25 to less than 30.

9. The coating system of claim 1, wherein the weight ratio of (b)(ii) to (b)(iii) in the composition from which the second coating layer is deposited is at least 1.5:

1.

10. The coating system of claim 9, wherein the weight ratio is at least 5:

1.

11. The coating system of claim 10, wherein the weight ratio is at least 10:

1.

12. The coating system of claim 11, wherein the weight ratio is at least 20:

1.

13. The coating system of claim 1, wherein the IR reflective pigment comprises a metal and/or metal alloy flake pigment.

14. The coating system of claim 13, wherein the flake pigment comprises aluminum.

15. An article comprising the coating system of claim 1 positioned on a surface of the article.

16. The article of claim 15, wherein the article is an aircraft component.