Corrosion-resistant reservoir for an e-vaping device and method of manufacturing thereof

Patent metadata

Field	Value
Publication number	US-11053395-B2
Application number	US-201715619997-A
Country	US
Kind code	B2
Filing date	Jun 12, 2017
Priority date	Jun 12, 2017
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

Example embodiments relate to a method of protecting a surface of an e-vaping device portion from corrosion, the method including preparing a coating mixture configured to protect the surface from corrosion, and coating the surface with a protective coating based on the coating mixture, wherein the coating is performed via one of electrodeposition, dipping, spraying, and vapor deposition, and the coating mixture includes at least one of a silane and a resin.

First claim

What is claimed is:

1. A method of protecting an inside surface of an e-vaping device portion from corrosion, the method comprising:
preparing a coating mixture configured to protect the inside surface from corrosion and a pre-vapor formulation, the coating mixture configured to withstand a repeatable operating temperature cycle of the e-vaping device without degrading, and including preparing a first mixture by dissolving a first polymer and preparing a second mixture by dissolving a second polymer, preparing the second mixture includes dissolving the second polymer in a water dispersion that includes about 30% to about 40% of particulate dispersion, the second polymer being a cationic polymer and the particulate dispersion includes solid polymer particles; and
coating the inside surface with a permanent protective coating based on the coating mixture;
the coating being performed via electrodeposition, vapor deposition, or both; and
the coating mixture including a silane, a resin, or both.

2. The method of claim 1 , wherein the preparing the coating mixture comprises:
preparing a third mixture by dissolving a silane.

3. The method of claim 2 , wherein the preparing the first mixture comprises:
dissolving the first polymer at a concentration of about 1% to about 5% by weight in water;
adding acetic acid to adjust a pH of the first mixture to be smaller than or equal to 6; and
heating the first mixture to between about 50° C. and about 70° C.

4. The method of claim 3 , further comprising:
adding a filler at a weight ratio of about 10 parts of the first polymer to 1 part of filler.

5. The method of claim 4 , wherein the pH of the first mixture is in the range of about 4 to about 5.

6. The method of claim 4 , wherein the adding the filler comprises adding the filler at a weight ratio of about 100 parts of the first polymer to 1 part of filler.

7. The method of claim 3 , wherein the first polymer comprises chitosan.

8. The method of claim 2 , wherein the preparing the third mixture comprises:
mixing a solvent with the silane at about 5% to about 20% by weight of the silane;
adding acetic acid to adjust the pH to stabilize hydrolyzed silane; and
mixing the third mixture via agitation at room temperature for about 10 mn to about 1 hour.

9. The method of claim 8 , wherein the solvent comprises water, methanol, or both.

10. The method of claim 8 , wherein the silane comprises TEOS, BTSE, or both.

11. The method of claim 2 , wherein when the coating is performed via vapor deposition, the coating comprises:
cleaning the inside surface of the e-vaping device portion;
depositing an intermediate adhesive layer on the inside surface of the e-vaping device portion; and
performing vapor deposition to deposit a coat on the inside surface of the e-vaping device portion.

12. The method of claim 11 , wherein the cleaning comprises:
one of vapor degreasing, ultrasound cleaning, machine washing, a sub-combination thereof, or a combination thereof, the e-vaping device portion; and
drying the e-vaping device portion.

13. The method of claim 11 , wherein the depositing comprises dipping the e-vaping device portion in a solution including about 0.05% to about 5% by volume of a silane solution.

14. The method of claim 13 , wherein the silane solution comprises one of:
about 50% water and about 50% isopropanol mixture; or
about 2% to about 10% methanol based BTSE.

15. The method of claim 11 , wherein the intermediate adhesive layer comprises one of silane, carboxylic acid, an anhydride group containing one or more polymers, a sub-combination thereof, or a combination thereof.

16. The method of claim 11 , wherein the coat comprises parylene.

17. The method of claim 16 , wherein the performing the vapor deposition comprises:
heating parylene at a temperature of equal to or greater than about 600° C. to pyrolize a parylene dimer into a monomer; and
depositing the parylene monomer over metallic portions of the e-vaping device portion at room temperature.

18. The method of claim 17 , wherein a thickness of the parylene is between about 0.05 μm and about 2 μm.

19. The method of claim 16 , wherein the performing the vapor deposition comprises performing one of chemical vapor deposition or physical vapor deposition.

20. The method of claim 11 , wherein a thickness of the intermediate adhesive layer is between about 0.1 μm and about 5 μm.

21. The method of claim 1 , further comprising:
adding a filler at a weight ratio of about 10 parts of the second polymer to 1 part of filler.

22. The method of claim 21 , wherein the adding the filler comprises adding the filler at a weight ratio of about 100 parts of the second polymer to 1 part of filler.

23. The method of claim 1 , wherein the preparing the coating mixture comprises:
combining the second mixture and the third mixture at a ratio of about 6 to 1.

24. The method of claim 1 , wherein the preparing the coating mixture comprises:
combining the second mixture and the third mixture at a ratio of about 6 to 1.

25. The method of claim 1 , wherein when the coating is performed via electrodeposition, the coating the inside surface comprises:
filling an electrodeposition vessel with the coating mixture, the electrodeposition vessel including an anode and a cathode;
connecting the cathode with the e-vaping device portion; and
depositing the coating mixture on the inside surface of the e-vaping device portion.

26. The method of claim 25 , wherein the depositing the coating mixture comprises:
applying an electrodeposition voltage between the anode and the cathode of between about 1 V to about 50 V.

27. The method of claim 25 , wherein the depositing the coating mixture comprises:
applying an electrodeposition current between the anode and the cathode that is less than about 3 A.

28. The method of claim 27 , wherein the electrodeposition current is between about 5 mA and about 200 mA.

29. The method of claim 25 , further comprising:
removing the e-vaping device portion from the electrodeposition vessel;
washing the e-vaping device portion; and
drying the e-vaping device portion.

30. The method of claim 29 , wherein the drying the e-vaping device portion is performed at a temperature between about 50° C. to about 200° C. for a period of time between about 1 mn to about 30 mn.

31. The method of claim 1 , wherein the inner surfaces of the e-vaping device include inside surfaces of a heater, interior walls of a reservoir configured to store the pre-vapor formulation, or a combination thereof.

32. The method of claim 1 , wherein the coating mixture further comprises a filler, wherein the filler includes at least one of TiO2, clay, ZrO2, ZrO2-Y2O3, CeO2, Al2O3, or a combination thereof.

Assignees

• Altria Client Services Llc

Inventors

• Karles Georgios D
• Sundar Rangaraj S

Classifications

• C25D13/06

  with polymers {(not used, see C09D5/44)} · CPC title

• C09D5/44

  for electrophoretic applications (processes for coating by electrophoresis C25D13/00) · CPC title

• C09D5/08 Primary

  Anti-corrosive paints · CPC title

• B05D1/18

  performed by dipping · CPC title

• B05D1/60

  Deposition of organic layers from vapour phase (vapour phase deposition in general C23C14/00, C23C16/00) · CPC title