Tire with thermoplastic innerliner

Patent metadata

Field	Value
Publication number	US-10150336-B2
Application number	US-201514973883-A
Country	US
Kind code	B2
Filing date	Dec 18, 2015
Priority date	Dec 19, 2014
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

The present invention is directed to a pneumatic tire comprising a carcass and an innerliner in direct contact with the carcass, the innerliner comprising: a film comprising a blend of a polyamide, an α-olefin graft copolymer, and an ionomer; and an adhesive layer disposed between the film and the carcass, the adhesive layer comprising: a polymeric amine and a resorcinol-formaldehyde-latex (RFL) adhesive. The invention is further directed to a method of building a pneumatic tire comprising the steps of: exposing an innerliner film to a corona discharge to create a corona treated film, the innerliner film comprising a blend of a polyamide, an α-olefin graft copolymer, and an ionomer; disposing a polymeric amine onto the corona treated film to create an amine treated film; disposing a resorcinol-formaldehyde-latex (RFL) adhesive on the amine treated film to create a treated innerliner film; and incorporating the treated innerliner film into a tire build such that the treated innerliner film is in direct contact with a tire carcass.

First claim

What is claimed is:

1. A method of building a pneumatic tire comprising the steps of:
exposing an innerliner film to a corona discharge to create a corona treated film, the innerliner film comprising a blend of a polyamide, an α-olefin graft copolymer, and an ionomer;
disposing a polymeric amine onto the corona treated film to create an amine treated film;
disposing a resorcinol-formaldehyde-latex (RFL) adhesive on the amine treated film to create a RFL-treated innerliner film, wherein the RFL consists of a resorcinol-formaldehyde resin, a styrene-butadiene rubber, and a vinylpyridine-styrene-butadiene rubber;
disposing a polymethylmethacrylate-grafted natural rubber onto the RFL-treated innerliner film after disposing the RFL adhesive to create a PMMA-NR treated innerliner film; and
incorporating the PMMA-NR treated innerliner film into a tire build such that the treated innerliner film is in direct contact with a tire carcass.

2. The method of claim 1 , wherein the polyamide is selected from the group consisting of polyamide 6/66, polyamide 6, polyamide 66, polyamide 6/12, polyamide 6/10, polyamide 11, polyamide 12, and nylon-MXD6.

3. The method of claim 1 , wherein the polyamide is polyamide 6/66.

4. The method of claim 1 , wherein the α-olefin graft copolymer is derived from ethylene and a second α-olefin, and the α-olefin graft copolymer is grafted with an anhydride of an α, β-unsaturated carboxylic acid.

5. The method of claim 1 , wherein the α-olefin graft copolymer is derived from ethylene and 1-octene, and the α-olefin graft copolymer is grafted with units derived from maleic anhydride.

6. The method of claim 1 , wherein the ionomer is an at least partially neutralized salt of a copolymer derived from ethylene and an α, β-unsaturated monocarboxylic acid.

7. The method of claim 1 , wherein the ionomer is an at least partially neutralized zinc salt of a copolymer derived from ethylene and methacrylic acid.

8. The method of claim 1 , wherein the polymeric amine is a polyethylene imine.

9. The method of claim 1 , wherein the blend comprises:
from 50 to 70 parts by weight of polyamide;
from 10 to 30 parts by weight of the α-olefin graft copolymer; and
from 10 to 30 parts by weight of the ionomer.

Assignees

• Goodyear Tire & Rubber

Inventors

• Brace Lauren Elizabeth
• Gillick James Gregory
• He Xiaojun

Classifications

• C08L9/06

  Copolymers with styrene · CPC title

• B32B27/08

  of synthetic resin · CPC title

• C09J161/12

  with polyhydric phenols · CPC title

• B32B2307/732

  Dimensional properties · CPC title

• B60C1/00

  Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition · CPC title