Claims
- 1. A method for producing a deflation-proof tire which comprises:
filling a pneumatic tire casing with a filling composition which comprises:
(a) a polyisocyanate comprising polymeric diphenylmethane diisocyanate alone or blended with diphenylmethane diisocyanate or a modified diphenylmethane diisocyanate, wherein said polyisocyanate has an average functionality of about 2.3, or greater; (b) a high molecular weight polyol or blend of polyols having a hydroxyl number in the range of about 20 to about 31 and having an actual hydroxyl functionality of greater than 2.1; (c) from about 6 to about 65 weight % plasticizing extender oil, said extender oil having a % H below 10.00; and (d) no greater than 0.5 weight % polyamine, in the presence of a catalyst to form a polyurethane elastomer; and curing said elastomer to produce an elastomeric filling composition within said casing having a vertical rebound of greater than about 60% based on ASTM D2632 and a Durometer hardness in the range of about 5 to 60 (Shore A).
- 2. The method of claim 1 wherein said extender oil comprises a mixture of at least a polar extender oil and at least a non-polar extender oil to form a compatible mixture having at least a slight positive polarity.
- 3. The method of claim 1 wherein said extender oil is a substantially aromatic extender oil.
- 4. The method of claim 1 wherein said mixture contains no polyamine.
- 5. The method of claim 1 wherein said filling composition additionally comprises up to about 0.5 weight % water.
- 6. The method of claim 1 wherein said filling composition additionally comprises up to about 10 weight % of a low molecular weight diol or triol.
- 7. The method of claim 4 wherein said filling composition additionally comprises up to about 0.5 weight % water.
- 8. The method of claim 6 wherein said filling composition additionally comprises up to about 0.5 weight % water.
- 9. The method of claim 7 wherein said filling composition additionally comprises up to about 10 weight % of a low molecular weight diol or triol.
- 10. The method of claim 1 wherein said isocyanate is in the range of about 3 to about 15% by weight.
- 11. A method for producing a deflation-proof tire which comprises:
filling a pneumatic tire casing with a filling composition which comprises:
(a) a polyisocyanate comprising polymeric diphenylmethane dissocyanate alone or blended with diphenylmethane dissocyanate or a modified diphenylmethane diisocyanate, wherein said polyisocyanate has an average functionality of greater than about 2.3; (b) a high molecular weight polyol or blend of polyols having a hydroxyl number in the range of about 20 to about 31 and having an actual hydroxyl functionality of greater than 2.1; (c) from about 20 to about 65 weight % plasticizing extender oil, said extender oil having a % H below 10.00; and (d) no greater than 0.4 weight % polyamine, in the presence of a catalyst to form a polyurethane elastomer; and curing said elastomer to produce an elastomeric filling composition within said casing having a vertical rebound of greater than about 70% based on ASTM D2632, a Durometer hardness in the range of about 10 to 60 (Shore A), and a maximum temperature of no greater than 240° F. after 47 hours of the Federal Motor Vehicle Safety Standard #119 Durability Test.
- 12. The method of claim 11 wherein said extender oil comprises a mixture of at least a polar extender oil and at least a non-polar extender oil to form a compatible mixture having at least a slight positive polarity.
- 13. The method of claim 11 wherein said extender oil is a substantially aromatic extender oil.
- 14. The method of claim 11 wherein said mixture contains no polyamine.
- 15. The method of claim 11 wherein said filling composition additionally comprises up to about 0.5 weight % water.
- 16. The method of claim 11 wherein said filling composition additionally comprises up to about 10 weight % of a low molecular weight diol or triol.
- 17. The method of claim 14 wherein said filling composition additionally comprises up to about 0.5 weight % water.
- 18. The method of claim 16 wherein said filling composition additionally comprises up to about 0.5 weight % water.
- 19. The method of claim 17 wherein said filling composition additionally comprises up to about 10 weight % of a low molecular weight diol or triol.
- 20. The method of claim 11 wherein said isocyanate is in the range of about 3 to about 15% by weight.
- 21. A pneumatic tire filling composition comprising a catalytically cured mixture of:
(a) from about 3 to about 15 parts by weight of at least a medium functionality isocyanate selected from the group consisting of diphenylmethane dissocyanate, a modified diphenylmethane dissocyanate, polymeric diphenylmethane dissocyanate, and mixtures thereof, wherein said isocyanate has an average functionality of at least 2.3; (b) from about 6 to 65 parts by weight polar plasticizing extender oil; (c) no greater than 0.5 weight % polyamine; and (d) an amount to bring the amount of the cured mixture to 100 parts by weight of a high molecular weight polyol or blend of polyols having a hydroxyl number in the range of about 20 to about 31 and having an actual functionality of greater than 2.1, the cured filling composition having a vertical rebound of greater than about 60% based on ASTM D2632 and a Durometer hardness in the range of about 10 to 50 (Shore A).
- 22. The composition of claim 21 wherein said extender oil comprises a mixture of at least one polar extender oil and at least one non-polar extender oil to form a compatible mixture having at least a slight positive polarity.
- 23. The composition of claim 21 wherein said extender oil is a substantially aromatic extender oil.
- 24. The composition of claim 21 wherein said mixture contains no polyamine.
- 25. The composition of claim 21 wherein said filling composition additionally comprises up to about 0.5 weight % water.
- 26. The composition of claim 21 wherein said filling composition additionally comprises up to about 10 weight % of a low molecular weight diol or triol.
- 27. The composition of claim 24 wherein said filling composition additionally comprises up to about 0.5 weight % water.
- 28. The composition of claim 26 wherein said filling composition additionally comprises up to about 0.5 weight % water.
- 29. The composition of claim 27 wherein said filling composition additionally comprises up to about 10 weight % of a low molecular weight diol or triol.
- 30. The method of claim 21 wherein said isocyanate is in the range of about 3 to about 15% by weight.
- 31. A pneumatic tire filling composition comprising a catalytically cured mixture of:
(a) from about 3 to about 15 parts by weight of at least a medium functionality isocyanate selected from the group consisting of diphenylmethane dissocyanate, a modified diphenylmethane dissocyanate, polymeric diphenylmethane dissocyanate, and mixtures thereof, wherein said isocyanate has an average functionality of at least 2.3; (b) from about 20 to 65 parts by weight polar plasticizing extender oil; (c) no greater than 0.4 weight % polyamine; and (d) an amount to bring the amount of the cured mixture to 100 parts by weight of a high molecular weight polyol or blend of polyols having a hydroxyl number in the range of about 20 to about 31 and having an actual functionality of greater than 2.1, the cured filling composition having a vertical rebound of greater than about 70% based on ASTM D2632, a Durometer hardness in the range of about 10 to 60 (Shore A), and a maximum temperature of no greater than 240° F. after 47 hours of the Federal Motor Vehicle Safety Standard #119 Durability Test.
- 32. The composition of claim 31 wherein said extender oil comprises a mixture of at least one polar extender oil and at least one non-polar extender oil to form a compatible mixture having at least a slight positive polarity.
- 33. The composition of claim 31 wherein said extender oil is a substantially aromatic extender oil.
- 34. The composition of claim 31 wherein said mixture contains no polyamine.
- 35. The composition of claim 31 wherein said filling composition additionally comprises up to about 0.5 weight % water.
- 36. The composition of claim 31 wherein said filling composition additionally comprises up to about 10 weight % of a low molecular weight diol or triol.
- 37. The composition of claim 34 wherein said filling composition additionally comprises up to about 0.5 weight % water.
- 38. The composition of claim 36 wherein said filling composition additionally comprises up to about 0.5 weight % water.
- 39. The composition of claim 37 wherein said filling composition additionally comprises up to about 10 weight % of a low molecular weight diol or triol.
Parent Case Info
[0001] This application is a continuation-in-part of application Ser. No. 08/924,577, filed Sep. 5, 1997.
Divisions (1)
|
Number |
Date |
Country |
Parent |
09288362 |
Apr 1999 |
US |
Child |
09755495 |
Jan 2001 |
US |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
08924577 |
Sep 1997 |
US |
Child |
09288362 |
Apr 1999 |
US |