Erosion resistant films for use on heated aerodynamic surfaces

Patent metadata

Field	Value
Publication number	US-10272985-B2
Application number	US-201615150130-A
Country	US
Kind code	B2
Filing date	May 9, 2016
Priority date	Aug 10, 2007
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

The present disclosure provides a tape comprising: a) a single layer comprising a crosslinked polymer, selected from the group consisting of crosslinked polyurethane, crosslinked polyurea, and crosslinked mixed polyurethane/polyurea polymer, and b) an adhesive layer. In another embodiment, the tape comprises at least one layer comprising a semi-interpenetrating polymer network of a crosslinked acrylate and an uncrosslinked polymer selected from the group consisting of polyurethane, polyurea, and mixed polyurethane/polyurea polymer.

First claim

We claim:

1. A method of providing erosion resistance on aircraft, the method comprising:
a) providing an aircraft element comprising:
i) an aircraft skin segment having an external surface, and
ii) an internal de-icing mechanism associated with said aircraft skin segment capable of heating said external surface to temperatures in excess of 65° C.;

b) bonding to the aircraft element a tape comprising:
i) at least one layer comprising a crosslinked polymer, selected from the group consisting of crosslinked polyurethane, crosslinked polyurea, and crosslinked mixed polyurethane/polyurea polymer, and
ii) an adhesive layer, wherein the tape is bonded to the external surface of the aircraft skin segment by the adhesive layer.

2. The method according to claim 1 , wherein the crosslinked polymer is blended with at least one acrylate component.

3. The method according to claim 2 , wherein the acrylate component is derived from an acrylate component precursor copolymerized into the polyurethane or polyurea prior to crosslinking of the acrylate component precursor.

4. The method of claim 3 , wherein the acrylate component is formed by crosslinking the acrylate component precursor by e-beam or other radiation.

5. The method according to claim 3 , wherein the acrylate component precursor comprises caprolactone acrylate, hydroxyethyl acrylate, dipentaerythritol pentaacrylate, or mixture thereof.

6. The method according to claim 1 , wherein said at least one layer comprising a crosslinked polymer is a single layer consisting essentially of crosslinked polyurethane.

7. The method according to claim 6 , wherein said at least one layer comprising a crosslinked polymer is a single layer consisting essentially of crosslinked polyurethane which incorporates at least one acrylate component.

8. The method according to claim 1 , wherein said at least one layer comprising a crosslinked polymer is a single layer consisting essentially of crosslinked polyurea.

9. The method according to claim 8 , wherein said at least one layer comprising a crosslinked polymer is a single layer consisting essentially of crosslinked polyurea which incorporates at least one acrylate component.

10. The method according to claim 1 , wherein the adhesive is a pressure-sensitive adhesive.

11. The method according to claim 10 , wherein the pressure-sensitive adhesive comprises an acrylic, polyurethane, silicone, styrene-butadiene block copolymer, or styrene-isoprene block copolymer.

12. The method according to claim 1 , wherein the tape comprises no uncrosslinked polymer layer other than the adhesive layer.

13. The method according to claim 1 , wherein the tape comprises no uncrosslinked polymer other than the adhesive layer.

14. The method according to claim 1 , wherein the crosslinked polymer incorporates at least one acrylate component.

15. The method according to claim 1 , wherein the crosslinked polymer is a crosslinked polyurethane.

16. The method according to claim 1 , wherein the crosslinked polymer is a crosslinked polyurea.

17. The method according to claim 1 , wherein the external surface of the aircraft skin segment includes one or more layers of paint and/or primer.

18. The method according to claim 1 , wherein the crosslinked polymer is elastomeric.

19. The method according to claim 1 , wherein the tape is made by reactive extrusion, reactive coating, or blending the polyurethane or polyurea with an acrylate.

20. An erosion resistant aircraft construction made from the method according to claim 1 .

Assignees

• 3M Innovative Properties Co

Inventors

• Marx Ryan E
• Feisel Bryan C
• Weiss Douglas E

Classifications

• B32B2605/18

  Aircraft · CPC title

• B32B37/12

  characterised by using adhesives · CPC title

• C09J2201/606

  Chemistry & Metallurgy · mapped topic

• C09J2433/006

  in the substrate · CPC title

• C09J133/08

  Homopolymers or copolymers of acrylic acid esters · CPC title