Methods for treating inner liner surface, inner liners resulting therefrom and tires containing such inner liners

Patent metadata

Field	Value
Publication number	US-11207919-B2
Application number	US-201715629096-A
Country	US
Kind code	B2
Filing date	Jun 21, 2017
Priority date	Jun 21, 2016
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

Methods for treating the surface of a cured inner liner are disclosed. By use of these methods a treated, cured inner liner is produced which has a lower surface with increased adherability to other materials (e.g., adhesives). Treated, cured inner liners resulting from such methods as well as tires containing the treated inner liners.

First claim

What is claimed is:

1. A method for treating the surface of a cured tire inner liner comprising:
providing a cured tire inner liner having a thickness of 0.5 to 2 mm and an upper and a lower surface wherein the tire inner liner comprises rubber, a majority by weight of which comprises butyl rubber, and 10-100 phr of at least one filler comprising carbon black, clay, or silica, and the lower surface further comprises polysiloxane moieties, and
treating the lower surface of the cured tire inner liner to convert at least a portion of the polysiloxane moieties to silanol moieties, thereby producing a treated, cured tire inner liner having a treated lower surface with at least a majority by weight of silicon atoms contained within silanol moieties.

2. The method of claim 1 , wherein the treating comprises exposing the lower surface of the cured tire inner liner to radiation having a wavelength of less than 400 nm.

3. The method of claim 2 , wherein the radiation has a wavelength of 315-280 nm.

4. The method of claim 3 , wherein the exposing comprises subjecting the lower surface of the cured tire inner liner to the radiation for 0.2 to 2 minutes.

5. The method of claim 4 , wherein the exposing comprises application of 50 to 500 milliwatts/cm 2 of radiation.

6. The method of claim 2 , wherein the exposing comprises subjecting the lower surface of the cured tire inner liner to the radiation for 0.2 to 2 minutes.

7. The method of claim 6 , wherein the exposing comprises application of 50 to 500 milliwatts/cm 2 of radiation.

8. The method of claim 2 , wherein the exposing comprises application of 50 to 500 milliwatts/cm 2 of radiation.

9. The method of claim 1 , wherein the treating comprises applying at least one inorganic oxidant to the lower surface of the cured tire inner liner.

10. The method of claim 1 , further comprising adhering at least one component radially inner of the treated, cured tire inner liner.

11. The method of claim 10 , wherein the at least one component radially inner of the treated, cured tire inner liner comprises a noise barrier and an adhesive layer is present between the inner liner and the noise barrier.

12. The method of claim 10 , wherein the at least one component radially inner of the treated, cured tire inner liner comprises a sealant layer and no adhesive layer is present between the inner liner and the sealant layer.

13. The method of claim 10 , wherein the at least one component radially inner of the treated, cured tire inner liner comprises a run-flat insert.

14. A method for treating the surface of a cured tire inner liner comprising:
providing a cured tire inner liner having a thickness of 0.5 to 2 mm and an upper and a lower surface wherein the inner liner comprises rubber, a majority by weight of which comprises butyl rubber, and 10-100 phr of at least one filler comprising carbon black, clay, or silica, and the lower surface further comprises polysiloxane moieties, and
treating the lower surface of the cured tire inner liner to increase its hydrophilicity by oxidizing at least a portion of the polysiloxane moieties, thereby producing a treated, cured tire inner liner having a treated lower surface with at least a majority by weight of silicon atoms contained within silanol moieties.

15. The method of claim 14 , wherein the treating comprises exposing the lower surface of the cured tire inner liner to radiation having a wavelength of less than 400 nm.

16. The method of claim 15 , wherein the radiation has a wavelength of 315-280 nm.

17. The method of claim 14 , wherein the treating comprises applying at least one inorganic oxidant to the lower surface of the cured tire inner liner.

18. The method of claim 14 , wherein the exposing comprises subjecting the lower surface of the cured tire inner liner to the radiation for 0.2 to 2 minutes.

19. The method of claim 15 , wherein the exposing comprises subjecting the lower surface of the cured tire inner liner to the radiation for 0.2 to 2 minutes.

20. The method of claim 19 , wherein the exposing comprises application of 50 to 500 milliwatts/cm 2 of radiation.

21. The method of claim 14 , wherein the exposing comprises application of 50 to 500 milliwatts/cm 2 of radiation.

22. The method of claim 14 , further comprising adhering at least one component radially inner of the treated, cured tire inner liner.

23. The method of claim 22 , wherein the at least one component radially inner of the treated, cured tire inner liner comprises a noise barrier and an adhesive layer is present between the treated, cured tire inner liner and the noise barrier.

24. The method of claim 22 , wherein the at least one component radially inner of the treated, cured tire inner liner comprises a sealant layer and no adhesive layer is present between the treated, cured tire inner liner and the sealant layer.

25. The method of claim 22 , wherein the at least one component radially inner of the treated, cured tire inner liner comprises a run-flat insert.

Assignees

• Bridgestone Americas Tire Operations Llc

Inventors

• Liao Kung-Ching
• Abell Joshua P
• Sheaffer Jenny L

Classifications

• B29D30/0681 Primary

  Parts of pneumatic tyres; accessories, auxiliary operations · CPC title

• B60C1/0008

  Compositions of the inner liner · CPC title

• B60C5/04 Primary

  Shape or construction of inflatable inserts (B60C5/10 takes precedence) · CPC title

• B60C17/00

  Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor · CPC title

• B29D2030/0682

  Inner liners · CPC title