Patent US4029730A successfully refreshed from Google Patents.
US4029730A
Expired / Lapsed
US
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Cordless vehicle tire
Assignee: Uniroyal Chemical Co Inc
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Filing: 1975-06-25
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Granted: 1977-06-14
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Expires: 1995-06-25
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
2026-11-05 02:31
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)
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 |