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US4029730A Expired / Lapsed US ⏱️ 0.0 years remaining

Cordless vehicle tire

Assignee: Uniroyal Chemical Co Inc
•
Filing: 1975-06-25
•
Granted: 1977-06-14
•
Expires: 1995-06-25
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Abstract

Abstract A cordless vehicle tire of an elastomeric polyurethane sidewall adhered to a tread of an elastomeric ethylene/propylene/non-conjugated diene polymer wherein the polyurethane is the product of reacting an organic diisocyanate with a poly(alkylene oxide) glycol to prepare an isocyanato-terminated prepolymer cured by reaction with methylene dianiline introduced into the prepolymer in the form of a complex with salts of the group sodium chloride, sodium bromide, sodium iodide, sodium nitrite, lithium chloride, lithium bromide, lithium iodide, lithium nitrite or sodium cyanide, said methylene dianiline being liberated from said complex by heating the mixture of prepolymer containing complex, and a process for producing such tires.

Inventors

  • 👤 Herman E. Schroeder

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 20:37
CPC Classifications
B; B60; B60C; B60C1/00; B29; B29D; B29D30/00; B29D30/06; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S152/00; Y10S152/905

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 104 words
A process for rapidly making a cordless vehicle tire which comprises adding to a mold containing an ethylene/propylene/non-conjugated diene elastomer tread an isocyanato-terminated prepolymer made from the reaction of an organic diisocyanate and a poly(alkylene oxide) glycol containing dispersed therein a methylene dianiline salt complex wherein said salt is selected from the group consisting of sodium chloride, sodium bromide, sodium iodide, sodium nitrite, lithium chloride, lithium bromide, lithium iodide, lithium nitrite or sodium cyanide, heating the prepolymer to a temperature of at least about 100° C in contact with the tread to simultaneously effect curing and adherence of the resulting polyurethane-carcass-sidewall to the tread.
Claim 2
Dependent Claim 104 words
A process for rapidly making a cordless vehicle tire which comprises adding to a mold containing an ethylene/propylene/non-conjugated diene elastomer tread an isocyanato-terminated prepolymer made from the reaction of an organic diisocyanate and a poly(alkylene oxide) glycol containing dispersed therein a methylene dianiline salt complex wherein said salt is selected from the group consisting of sodium chloride, sodium bromide, sodium iodide, sodium nitrite, lithium chloride, lithium bromide, lithium iodide, lithium nitrite or sodium cyanide, heating the prepolymer to a temperature of at least about 100° C in contact with the tread to simultaneously effect curing and adherence of the resulting polyurethane-carcass-sidewall to the tread.
Claim 3
Dependent Claim 19 words
A process of claim 1 wherein the tire is removed from the mold in less than about 3 minutes.
Claim 4
Dependent Claim 11 words
A process of claim 1 wherein the salt is sodium chloride.
Claim 5
Dependent Claim 11 words
A process of claim 1 wherein the non-conjugated diene is 1,4-hexadiene.
Claim 6
Dependent Claim 40 words
A process of claim 1 wherein the tread added to the tire mold is partially cured during its formation by injection molding, and curing of said tread is completed in the tire mold during casting and curing of said prepolymer.

References Cited (Backward Citations)

US3208500A Cited
US3385342A Cited
US3701374A Cited
US3755261A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-06-13 1980-12-13 1981-06-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-06-13 1984-12-13 1985-06-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-06-13 1988-12-13 1989-06-14 $7700.00 Window Closed / Lapsed

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