Inner liner for pneumatic tire

Patent metadata

Field	Value
Publication number	US-9944125-B2
Application number	US-201114365546-A
Country	US
Kind code	B2
Filing date	Dec 22, 2011
Priority date	Dec 22, 2011
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

A barrier layer is provided for an inflatable article for impeding the flow of inflation gas through the inflatable article. The barrier layer may be constructed of a material that is based upon a cross-linkable rubber composition, the cross-linkable rubber composition comprising, per 100 parts by weight of rubber (phr), between 1 phr and 40 phr of a chlorosulfonated polyethylene rubber, between 60 phr and 99 phr of a butyl rubber and a sulfur curing system.

First claim

What is claimed is:

1. A pneumatic tire having an inner tube or inner liner consisting only of a rubber composition based upon a cross-linkable elastomer composition, the cross-linkable elastomer composition comprising per 100 parts by weight or rubber (phr):
a rubber mixture of between 10 phr and 40 phr of a non-cross-linked chlorosulfonated polyethylene rubber and between 60 phr and 99 phr of a non-cross-linked butyl rubber; and
a single sulfur curing system for curing both the non-cross-linked chlorosulfonated polyethylene rubber and the non-cross-linked butyl rubber in the rubber mixture.

2. The pneumatic tire of claim 1 , wherein the chlorosulfonated polyethylene rubber has a chlorine content of between 30 wt. % and 40 wt. %.

3. The pneumatic tire of claim 1 , wherein the chlorosulfonated polyethylene rubber has a sulfur content of between 1 wt. % and 1.3 wt. %.

4. The pneumatic tire of claim 1 , wherein the cross-linkable elastomer composition further comprises:
a platy filler.

5. The pneumatic tire of claim 4 , wherein the platy filler is an organo-modified platy filler.

6. The pneumatic tire of claim 5 , wherein the platy filler is an organoclay.

7. The pneumatic tire of claim 5 , wherein the cross-linkable elastomer composition comprises between 1 phr and 15 phr of the platy filler.

8. The pneumatic tire of claim 1 , wherein the cross-linkable elastomer composition further comprises:
a plasticizing terpene resin.

9. The pneumatic tire of claim 1 , wherein the butyl rubber is halogenated.

10. The pneumatic tire of claim 9 , wherein the butyl rubber is bromobutyl rubber.

11. The pneumatic tire of claim 1 , wherein the barrier layer is an inner tube adapted for a pneumatic tire.

12. The pneumatic tire of claim 1 , wherein the barrier layer is disposed on an interior surface of the pneumatic tire.

13. The pneumatic tire of claim 1 , further comprising between 30 phr and 70 phr of a filler selected from carbon black, silica and combinations thereof.

Assignees

• Bergman Brian R
• Michelin & Cie

Inventors

• Bergman Brian R

Classifications

• C08L23/22

  Copolymers of isobutene; Butyl rubber; Homopolymers or copolymers of other iso-olefins · CPC title

• B60C1/0008 Primary

  Compositions of the inner liner · CPC title

• B60C5/02

  having separate inflatable inserts, e.g. with inner tubes; Means for lubricating, venting, preventing relative movement between tyre and inner tube (B60C5/20 takes precedence) · CPC title

• C08L23/34

  by chlorosulfonation · CPC title