Solar reflective coating composition

Patent metadata

Field	Value
Publication number	US-11118068-B2
Application number	US-202016814104-A
Country	US
Kind code	B2
Filing date	Mar 10, 2020
Priority date	Oct 27, 2017
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

A solar reflective coating composition includes: a film-forming resin; a plurality of near-IR transparent pigments dispersed in the film-forming resin, the plurality of near-IR transparent pigments including a first perylene pigment and a second perylene pigment different from the first perylene pigment; and a near-IR reflective pigment dispersed in the film-forming resin, the near-IR reflective pigment different from the first perylene pigment and the second perylene pigment. When formed into a cured coating over a substrate, the cured coating exhibits an off-white or grey color. The solar reflective coating composition is substantially free of carbon black. The present invention is also directed to a substrate having a surface at least partially coated with a solar reflective coating composition and a method of preparing a low weight aerospace component.

First claim

The invention claimed is:

1. A solar reflective coating composition, comprising:
a film-forming resin;
a plurality of near-IR transparent pigments dispersed in the film-forming resin; and
a near-IR reflective pigment dispersed in the film-forming resin, the near-IR reflective pigment different from the plurality of near-IR transparent pigments,
wherein, when formed into a cured coating over a substrate, the cured coating exhibits an off-white or grey color,
wherein the solar reflective coating composition is substantially free of carbon black,
wherein the cured coating exhibits a percent total solar reflectance (% TSR) of at least 45% as measured in accordance with ASTM E903-12, and
wherein the cured coating exhibits the off-white or grey color as defined by the following CIELAB values as measured using an integrating sphere with D65 Illumination, 10° observer with specular component included:
a L* value ranging from 40 to 95;
an a* value ranging from −2 to 2; and
a b* value ranging from −6 to 6.

2. The coating composition of claim 1 , wherein the cured coating exhibits a L* value ranging from 55 to 95.

3. The coating composition of claim 1 , wherein the plurality of near-IR transparent pigments comprise a perylene pigment, a copper phthalocyanine pigment, a halogenated copper phthalocyanine pigment, an anthraquinone pigment, a quinacridone pigment, a monoazo pigment, a disazo pigment, a quinophthalone pigment, an indanthrone pigment, a dioxazine pigment, an isoindoline pigment, a diarylide yellow pigment, a brominated anthranthrone pigment, and/or an azo metal complex pigment, or some combination thereof.

4. The coating composition of claim 1 , wherein the plurality of near-IR transparent pigments comprise a plurality of perylene pigments.

5. The coating composition of claim 4 , wherein the plurality of perylene pigments comprise a green-shade perylene black pigment and a purple-shade perylene black pigment.

6. The coating composition of claim 1 , wherein the near-IR reflective pigment comprises titanium dioxide.

7. The coating composition of claim 6 , wherein the titanium dioxide is dispersed in the film-forming resin in powder form.

8. The coating composition of claim 1 , wherein the cured coating fully hides the substrate at a dry film thickness of less than or equal to 2.5 mils, according to ASTM D6762.

9. A substrate comprising a surface at least partially coated with the solar reflective coating composition of claim 1 .

10. The substrate of claim 9 , wherein the substrate is an aerospace component.

11. The substrate of claim 10 , wherein the aerospace component comprises a carbon fiber reinforced polymer composite.

12. The substrate of claim 9 , wherein the solar reflective coating composition, when cured, is the sole coating layer on the substrate.

13. The substrate of claim 9 , wherein when the solar reflective coating composition is cured to form a solar reflective layer, the solar reflective layer has a dry film thickness of less than or equal to 2.5 mils.

14. The substrate of claim 9 , further comprising a basecoat layer underlying at least a portion of the solar reflective coating composition.

15. A vehicle comprising a surface at least partially coated with the solar reflective coating composition of claim 1 .

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

17. The vehicle of claim 15 , wherein when the solar reflective coating composition is cured to form a solar reflective layer, the solar reflective layer has a dry film thickness of less than or equal to 2.5 mils.

18. A method of preparing a low weight aerospace component, comprising:
coating at least a portion of surface of an aerospace component with the coating composition of claim 1 ; and
curing the solar reflective coating composition to form a solar reflective layer.

Assignees

• Prc Desoto Int Inc
• Ppg Ind Ohio Inc

Inventors

• Mcquown Stephen G
• Slomski John
• Hellring Stuart D
• Holsing Luann
• Gill Tejveen

Classifications

• C09D201/00

  Coating compositions based on unspecified macromolecular compounds · CPC title

• C09D5/32

  Radiation-absorbing paints {(protection against X-, gamma- or corpuscular radiation G21F)} · CPC title

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C08K5/00

  Use of organic ingredients · CPC title

• C08K2201/019

  the composition being defined by the absence of a certain additive · CPC title