Methods relating to polyurethane foam-containing and degradable foam-containing tires, and degradable foam-containing tires
AssigneeBridgestone Americas Tire Operations, LLC
InventorJoshua P. Abell
Life of this patent
Estimating the term…
Abstract
Disclosed herein are methods for degrading polyurethane foam from mounted polyurethane foam-containing tires, methods for separating a wheel from a mounted polyurethane foam-containing tire, methods for preparing a degradable foam-containing tire, and degradable foam-containing tires. The methods include applying a solution comprising at least one phosphorous oxoacid or an ester thereof to the polyurethane foam inside of a tire, incorporating a degradant comprising at least one phosphorous oxoacid or an ester thereof into the polyurethane foam, or both, and then heating to degrade the foam. Degradation of the foam allows for separation of the wheel from the rubber carcass of the tire.
Claims20
A tire containing degradable foam, the tire comprising:
- a. a wheel, a rubber carcass comprising at least a tread portion and a sidewall portion, and optionally a valve stem, and
- b. degradable foam comprised of a combination of at least one di- or polyisocyanate, at least one polyol, and a degradant comprising at least one phosphorous oxoacid or an ester thereof, the degradable foam contained in the interior of the rubber carcass, wherein the degradable foam is capable of degradation upon heating to a temperature above 120° C.
The tire of 4, wherein the ester comprises at least one of:
- a. a diester;
- b. a monoester;
- or
- c. a triester.
A tire containing degradable foam, the tire comprising:
- a. a wheel, a rubber carcass comprising at least a tread portion and a sidewall portion, and optionally a valve stem, and
- b. degradable foam comprised of a combination of at least one di- or polyisocyanate, at least one polyol, and a degradant comprising at least one ester of a phosphorous oxoacid, the degradable foam contained in the interior of the rubber carcass, wherein the degradable foam is capable of degradation upon heating to a temperature above 120° C.
- wherein the at least one ester of a phosphorous oxoacid has an ester functionality comprising an alkyl group each independently selected from C1-C41, or an aromatic or heteroaromatic group selected from C5-C53.
A tire containing degradable foam, the tire comprising:
- a. a wheel, a rubber carcass comprising at least a tread portion and a sidewall portion, and optionally a valve stem, and
- b. degradable foam comprised of a combination of at least one di- or polyisocyanate;
- at least one polyol;
- and a degradant comprising at least one phosphorous oxoacid or an ester thereof selected from the group consisting of dimethyl phosphonate, diethyl phosphonate, and combinations thereof, the degradable foam contained in the interior of the rubber carcass,
- wherein the degradable foam is capable of degradation upon heating to a temperature above 120° C.
Dependencies are inferred from the claim text.