Methods for retreading tires employing cushion gum with stable dinitrile oxide cure system
AssigneeBridgestone Americas Tire Operations, LLC
InventorsRobert Barned, Joshua Abell, David Bender
Life of this patent
Estimating the term…
Abstract
A process for retreading a tire, the process comprising the steps of providing a tire casing, providing a cured rubber component having first and second planar surfaces, providing a cushion gum, wherein the cushion gum contains a cure system comprising at least one stable aryl dinitrile oxide compound, applying the cushion gum to the tire casing, and forming a tire composite by applying the second planar surface of the cured rubber component to the cushion gum.
Claims20
A process for retreading a tire, the process comprising the steps of:
- (i) providing a tire casing;
- (ii) providing a cured rubber component having first and second planar surfaces;
- (iii) providing a cushion gum, wherein said step of providing the cushion gum includes extruding a cushion gum composition directly onto said tire casing or said second planar surface of said cured rubber component to form the cushion gum, wherein the cushion gum contains a cure system comprising at least one stable aryl dinitrile oxide compound;
- (iv) forming a tire composite by engaging the cured rubber component to the tire casing and sandwiching the cushion gum therebetween;
- and
- (v) allowing the at least one stable aryl dinitrile oxide compound to cure the cushion gum and then form a retreaded tire.
A cushion gum comprising:
- (i) a rubber component;
- (ii) a stable dinitrile oxide compound;
- and
- (iii) a reinforcing filler.
A process for retreading a tire where a cured rubber component is mated to a tire casing by using a cushion gum, the method comprising:
- (i) preparing a cushion gum composition by mixing a vulcanized rubber with a stable aryl dinitrile oxide compound;
- (ii) extruding the cushion gum composition directly onto a surface of the tire casing and/or cured rubber component;
- (iii) engaging the cured rubber component and tire casing to thereby sandwich the cushion gum therebetween and form a retread composite;
- and
- (iv) allowing the cushion gum to cure and thereby form a retread tire.
Dependencies are inferred from the claim text.