Liner-type, antistatic topcoat system for aircraft canopies and windshields

• US 10,442,549 B2
• Filed: 04/02/2015
• Issued: 10/15/2019
• Est. Priority Date: 04/02/2015
• Status: Active Grant

• Current Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: Bimanand, Alexander, Uprety, Krishna K., Lakdawala, Khushroo H.
• Primary Examiner(s): Le, Hoa (Holly)
• Application Number:
  US14/677,849
• Publication Number:
  US 20160376025A1
• Time in Patent Office: 1,657 Days
• CPC Class Codes: B05D 1/30 performed by gravity only, i.e. flow coating
• CPC Class Codes: B05D 3/101 Pretreatment of polymeric substrate
• CPC Class Codes: B05D 3/12 by mechanical means
• CPC Class Codes: B32B 27/40 comprising polyurethanes
• CPC Class Codes: B64C 1/1476 Canopies; Windscreens or similar transparent elements
• CPC Class Codes: B64C 1/1484 Windows B64C1/1492 takes precedence
• CPC Class Codes: B64D 45/02 Lightning protectors; Static dischargers in general H01T
• CPC Class Codes: C03C 17/38 at least one coating being a coating of an organic material
• CPC Class Codes: C08J 2369/00 Characterised by the use of polycarbonates; Derivatives of polycarbonates
• CPC Class Codes: C08J 2475/04 Polyurethanes
• CPC Class Codes: C08J 7/0423 with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
• CPC Class Codes: C08J 7/043 Improving the adhesiveness of the coatings per se, e.g. forming primers adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50
• CPC Class Codes: C08J 7/044 Forming conductive coatings; Forming coatings having anti-static properties
• CPC Class Codes: C08J 7/046 Forming abrasion-resistant coatings; Forming surface-hardening coatings
• CPC Class Codes: C08J 7/056 Forming hydrophilic coatings
• CPC Class Codes: C09D 183/04 Polysiloxanes
• CPC Class Codes: C09D 5/002 Priming paints C09D5/08 takes precedence
• CPC Class Codes: C09D 5/24 Electrically-conducting paints conductive materials H01B1/00
• CPC Class Codes: C23C 14/08 Oxides C23C14/10 takes precedence
• CPC Class Codes: C23C 14/083 of refractory metals or yttrium
• CPC Class Codes: C23C 14/20 : on organic substrates
• CPC Class Codes: C23C 14/35 : by application of a magnetic field, e.g. magnetron sputtering C23C14/3457 takes precedence
• CPC Class Codes: G02B 1/111 : using layers comprising organic materials
• CPC Class Codes: G02B 1/116 : including electrically conducting layers
• CPC Class Codes: G02B 1/16 : having an anti-static effect, e.g. electrically conducting coatings

Abstract

A coated substrate includes: a substrate; an electrically conductive multilayer stack on the substrate; and a coating on the electrically conductive multilayer stack. A thickness of the coating is 5 to 10 mils and the coating includes a conductive, anti-static tiecoat on the electrically conductive multilayer stack; and a conductive, anti-static topcoat on the conductive, anti-static tiecoat. The conductive, anti-static tiecoat and the conductive, anti-static topcoat are formed from a coating composition including a hydrophobic first aliphatic polyisocyanate, a second aliphatic polyisocyanate including a hydrophilic portion, a polyester polyol, a hydrophilic polyol, and a fluorinated polyol compound is disclosed.

Claims

1. A coated substrate comprising:

a substrate;

an electrically conductive multilayer stack on the substrate; and

a coating on the electrically conductive multilayer stack, a thickness of the coating being 5 to 10 mils and the coating comprising;

a conductive, anti-static tiecoat on the electrically conductive multilayer stack; and

a conductive, anti-static topcoat on the conductive, anti-static tiecoat, and

the conductive, anti-static tiecoat being formed from a coating composition comprising a hydrophobic first aliphatic polyisocyanate, a second aliphatic polyisocyanate comprising a hydrophilic portion, a polyester polyol, a hydrophilic polyol, and a fluorinated polyol.

2. The coated substrate of claim 1, wherein a thickness of each of the conductive, anti-static topcoat and the conductive, anti-static tiecoat is 2.5 to 5 mils.

3. The coated substrate of claim 1, wherein the thickness of the coating is 5 to 8 mils.

4. The coated substrate of claim 3, wherein a thickness of each of the conductive, anti-static topcoat and the conductive, anti-static tiecoat is 2.5 to 4 mils.

5. The coated substrate of claim 1, wherein the thickness of the coating is 6 to 8 mils.

6. The coated substrate of claim 5, wherein a thickness of each of the conductive, anti-static topcoat and the conductive, anti-static tiecoat is 3 to 4 mils.

7. The coated substrate of claim 1, wherein a thickness of the conductive, anti-static tiecoat is at least 3 mils.

8. The coated substrate of claim 1, wherein a thickness of the conductive, anti-static topcoat is at least 3 mils.

9. The coated substrate of claim 1, wherein the conductive, anti-static tiecoat is substantially free of inherently conductive polymers, ionic liquids, conductive oxides and carbon nanotubes.

10. The coated substrate of claim 1, wherein the conductive, anti-static topcoat is substantially free of inherently conductive polymers, ionic liquids, conductive oxides and carbon nanotubes.

11. The coated substrate of claim 1, further comprising a tiecoat between the substrate and the electrically conductive multilayer stack.

12. The coated substrate of claim 11, further comprising a basecoat between the tiecoat and the electrically conductive multilayer stack.

13. The coated substrate of claim 1, further comprising a primer layer between the electrically conductive multilayer stack and the conductive, anti-static tiecoat.

14. The coated substrate of claim 1, wherein the coating has a resilience such that the coating can be stretched to a length 50% or more longer than the as-formed length of the coating substantially without tearing the coating.

15. The coated substrate of claim 1, wherein the coating has a resilience such that the coating can be stretched to a length 100% or more longer than the as-formed length of the coating substantially without tearing the coating.

16. The coated substrate of claim 1, wherein the coating has a resilience such that the coating can be stretched to a length 200% or more longer than the as-formed length of the coating substantially without tearing the coating.

17. The coated substrate of claim 1, wherein the second aliphatic polyisocyanate further comprises a hydrophobic portion.

18. The coated substrate of claim 17, wherein the hydrophobic portion of the second aliphatic polyisocyanate comprises an isophorone diisocyanate moiety or a derivative thereof.

19. The coated substrate of claim 1, wherein the hydrophilic portion of the second aliphatic polyisocyanate comprises a polyether chain.

20. The coated substrate of claim 1, wherein the second aliphatic polyisocyanate comprises a polyether chain bonded to an isophorone diisocyanate trimer.