Pneumatic tire having reinforcing members and air barrier layer

Patent metadata

Field	Value
Publication number	US-11034188-B2
Application number	US-201715814954-A
Country	US
Kind code	B2
Filing date	Nov 16, 2017
Priority date	Nov 17, 2016
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A method of preparing a tire including the steps of: providing a cured tire, the tire including a first bead, a second bead, a carcass layer extending from the first bead to the second bead, and an optional innerliner layer disposed interior to the carcass layer; applying a pair of reinforcing members to the carcass layer or to the optional innerliner layer, if present; and applying an air barrier composition to the pair of reinforcing members, and to a portion of the carcass layer or to a portion of the optional innerliner layer to thereby form an air barrier layer.

First claim

What is claimed is:

1. A method of preparing a tire, the method comprising steps of:
(i) providing a cured tire, the cured tire including a first bead, a second bead, a carcass layer extending from the first bead to the second bead, and an innerliner layer disposed interior to the carcass layer;
(ii) applying a pair of reinforcing members to the innerliner layer of the cured tire; and
(iii) applying an air barrier composition to the pair of reinforcing members with the cured tire, and to a portion of the innerliner layer of the cured tire to thereby form an air barrier layer on the cured tire, wherein the air barrier layer is a phase-separated polymeric system wherein an elastomeric component is phase separated from a thermoplastic component, wherein the air barrier layer includes a permeability to oxygen (P(O 2 )) of less than 250 cc·mm/m 2 ·day·atm as measured in accordance with ASTM method F1927-14.

2. The method of claim 1 , wherein the reinforcing members are substantially capable of supporting the cured tire in a run flat condition.

3. The method of claim 1 , the cured tire having a tread with a first edge and a second edge, where a first reinforcing member of the pair of reinforcing members extends generally from the first edge of the tread to the first bead, and where a second reinforcing member of the pair of reinforcing members extends generally from the second edge of the tread to the second bead.

4. The method of claim 1 , wherein the reinforcing members are elastomeric.

5. The method of claim 1 , where the air barrier composition includes a phase-separated blend of a polyurethane as a continuous phase and a polysulfide elastomer as a discontinuous phase.

6. The method of claim 1 , wherein the step of applying an air barrier composition includes allowing the air barrier composition to cure to the portion of the innerliner layer of the cured tire.

7. The method of claim 1 , wherein each of the pair of reinforcing members consists of one crescent-shaped member.

8. A method of preparing a tire, the method comprising steps of:
(i) providing a cured tire, the cured tire including a first bead, a second bead, a carcass layer extending from the first bead to the second bead, and an innerliner layer disposed interior to the carcass layer;
(ii) applying a pair of reinforcing members to the innerliner layer of the cured tire, each of the pair of reinforcing members having a first longitudinal edge; and
(iii) applying an air barrier composition to a portion of the innerliner layer of the cured tire to thereby form an air barrier layer on the cured tire, wherein the air barrier layer is formed only between each first longitudinal edge of the pair of reinforcing members, wherein the air barrier composition is a phase-separated polymeric system wherein an elastomeric component is phase separated from a thermoplastic component, wherein the air barrier layer includes a permeability to oxygen (P(O 2 )) of less than 250 cc·mm/m 2 ·day·atm as measured in accordance with ASTM method F1927-14.

9. The method of claim 8 , wherein each of the pair of reinforcing members consists of one crescent-shaped member.

Assignees

• Bridgestone Americas Tire Operations Llc

Inventors

• Randall Amy M
• Balnis Craig R
• Zemla David J

Classifications

• B60C5/14 Primary

  with impervious liner or coating on the inner wall of the tyre · CPC title

• B29D30/0681

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

• B60C1/0008

  Compositions of the inner liner · CPC title

• B60C5/142

  provided partially, i.e. not covering the whole inner wall · CPC title

• B29D2030/0682

  Inner liners · CPC title