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

Patent metadata

Field	Value
Publication number	US-10442549-B2
Application number	US-201514677849-A
Country	US
Kind code	B2
Filing date	Apr 2, 2015
Priority date	Apr 2, 2015
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

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.

First claim

What is claimed is:

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.

Assignees

• Ppg Ind Ohio Inc

Inventors

• Bimanand Alexander
• Uprety Krishna K
• Lakdawala Khushroo H

Classifications

• C08J7/0423

  with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder · CPC title

• G02B1/16

  having an anti-static effect, e.g. electrically conducting coatings · CPC title

• G02B1/116

  including electrically conducting layers · CPC title

• B64C1/1476

  Canopies; Windscreens or similar transparent elements · CPC title

• C08J2369/00

  Characterised by the use of polycarbonates; Derivatives of polycarbonates · CPC title