Thermal spray plastic coating for edge sealing and fillet sealing

Patent metadata

Field	Value
Publication number	US-11136480-B2
Application number	US-201816052121-A
Country	US
Kind code	B2
Filing date	Aug 1, 2018
Priority date	Aug 1, 2018
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

Tunable thermoplastic polymer sealants and tunable conductive thermoplastic polymer sealants, and edge seals and fillet seals produced from such sealants; and substrates, components and objects comprising the tunable edge seals and fillet seals, and methods for making and applying such edge seals and fillet seals are disclosed.

First claim

What is claimed is:

1. A method for depositing a tunable thermoplastic polymer sealant material to a substrate surface, the method comprising:
delivering a first thermoplastic polymer powder feedstock to a high-velocity cold sprayer, said first thermoplastic polymer powder comprising at least one of: nylon, polyetheretherketone, polyetherketoneketone, polyamide, polyphenylsulfide, polyphenylsulfone, polysulfone, and polyetherimide, said thermoplastic polymer powder feedstock having an average particle size ranging from about 20 μm to about 300 μm;
delivering a second thermoplastic polymer powder feedstock to the high-velocity cold sprayer, said second thermoplastic polymer powder comprising at least one of: nylon, polyetheretherketone, polyetherketoneketone, polyamide, polyphenylsulfide, polyphenylsulfone, polysulfone, and polyetherimide, said thermoplastic polymer powder feedstock having an average particle size ranging from about 20 μm to about 300 μm;
tailoring the properties of the first thermoplastic polymer;
forming a tunable thermoplastic polymer powder feedstock;
directing the tunable thermoplastic polymer powder feedstock from the high-velocity cold sprayer to a substrate surface to form a thermoplastic sealant material;
forming a tunable thermoplastic polymer sealant material comprising a density ranging from about 1.0 to about 1.8 g/cc;
depositing an amount of the tunable thermoplastic polymer sealant material onto the substrate surface to form a tunable thermoplastic polymer seal, said tunable thermoplastic polymer seal deposited to an average thickness ranging from about 10 μm to about 2000 μm; and
wherein said first thermoplastic polymer powder feedstock is different from said second thermoplastic polymer powder feedstock.

2. The method of claim 1 wherein, in the step of directing the tunable thermoplastic polymer sealant material from the high-velocity cold sprayer to the substrate surface, the method further comprising;
directing movement of the high-velocity cold sprayer, said movement directed by a robot, said robot in communication with the high-velocity cold sprayer, said robotic further in communication with a controller.

3. The method of claim 1 , substantially concurrently with delivering the first thermoplastic polymer powder feedstock and the second thermoplastic polymer powder feedstock to the high-velocity cold sprayer further comprising;
delivering a conductive powder feedstock to the high-velocity cold sprayer, said conductive powder feedstock at least one of: titanium, nickel alloy, copper, carbon black, graphene powder, and carbon nanotubes.

4. The method of claim 3 , further comprising:
combining the thermoplastic polymer powder feedstock and the conductive powder feedstock at the high-velocity cold sprayer.

5. The method of claim 4 , further comprising:
forming a tunable conductive thermoplastic sealant material said tunable conductive thermoplastic sealant material comprising a density ranging from about 1.0 to about 1.8 g/cc; and
maintaining the tunable conductive thermoplastic sealant material at a temperature
less than the melting point of the tunable conductive thermoplastic sealant material.

6. The method of claim 5 , further comprising:
depositing the tunable conductive thermoplastic sealant material to the substrate surface.

7. The method of claim 6 wherein the conductive thermoplastic polymer sealant material has a resistivity value ranging from about 1×10 5 to about 1×10 8 ohm-m.

8. The method of claim 6 , further comprising:
forming a tunable conductive thermoplastic polymer seal.

9. The method of claim 8 , wherein the tunable conductive thermoplastic polymer seal has a Young's modulus ranging from about 1 MPa to about 4 GPa.

10. The method of claim 8 , wherein the tunable conductive thermoplastic polymer seal comprises at least one of: a fillet seal and an edge seal.

11. The method of claim 5 , wherein the tunable conductive thermoplastic polymer sealant material comprises a coloring agent.

12. The method of claim 5 , wherein said tunable conductive thermoplastic sealant material mixture comprises a conductive material in an amount ranging from about 1% to about 9% by volume of the conductive thermoplastic sealant material.

13. The method of claim 3 , wherein, in the step of directing the thermoplastic polymer powder feedstock from the high-velocity cold sprayer to a substrate surface, the method further comprising;
directing movement of the high-velocity cold sprayer, said movement directed by a robot in communication with the high-velocity cold sprayer, said robot further in communication with a controller.

14. The method of claim 3 , wherein the tunable conductive powder feedstock is delivered to the high-velocity cold sprayer in an amount ranging from about 1% to about 9% by volume of the amount of the at least one thermoplastic polymer powder feedstock.

15. The method of claim 3 , wherein said conductive powder feedstock comprises an average particle size ranging from about 5 μm to about 80 μm.

16. The method of claim 1 , further comprising:
combining the first thermoplastic polymer powder feedstock and the second thermoplastic polymer powder feedstock with a conductive powder to form a tunable conductive thermoplastic powder feedstock mixture.

17. The method of claim 16 , wherein the tunable conductive thermoplastic powder feedstock mixture comprises conductive powder in an amount ranging from about 1% to about 9% by volume of the conductive thermoplastic polymer powder feedstock.

18. The method of claim 1 , further comprising;
maintaining the temperature of the tunable thermoplastic sealant material at a temperature that is below the melting point of the thermoplastic sealant material.

19. The method of claim 1 , wherein the tunable thermoplastic polymer seal has a Young's modulus ranging from about 1 MPa to about 4 GPa.

20. The method of claim 1 , wherein the tunable thermoplastic polymer seal comprises at least one of: a fillet seal and an edge seal.

21. The method of claim 1 , wherein the tunable thermoplastic polymer powder feedstock comprises a coloring agent.

Assignees

• Boeing Co

Inventors

• Song Weidong
• Cai Fei

Classifications

• C09D171/00 Primary

  Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain (based on polyacetals C09D159/00; based on epoxy resins C09D163/00; based on polythioether-ethers C09D181/02; based on polyethersulfones C09D181/06); Coating compositions based on derivatives of such polymers · CPC title

• B29K2101/12

  Thermoplastic materials · CPC title

• C08G2650/40

  containing ketone groups, e.g. polyarylethylketones, PEEK or PEK · CPC title

• H05K9/0079

  Electrostatic discharge protection, e.g. ESD treated surface for rapid dissipation of charges · CPC title

• B05B15/00

  Details of spraying plant or spraying apparatus not otherwise provided for; Accessories · CPC title