US3905944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane prepared with 4,4{40 -diamino diphenyl disulfide
Assignee: Goodyear Tire and Rubber Co
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Filing: 1973-05-21
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Granted: 1975-09-16
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Expires: 1993-05-21
Abstract
Abstract Polyurethane reaction mixtures containing 4,4''-diamino diphenyl disulfide as the curative has sufficient pot life for making castings which are free of fish-eyes, bubbles and other imperfections and can be utilized to make castings as well as foams or nonhomogeneous polyurethane.
Inventors
- 👤 Anthony F Finelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:24
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3855; C08G18/3863; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A HOMOGENEOUS POLYURETHANE HAVING A CRESCENT TEAR OF AT LEAST 300 POUNDS PER INCH AND PREPARED BY REACTING THE EXCESS NCO IN A POLYURETHANE REACTION MIXTURE CONSISTING ESSENTIALLY OF A REACTIVE HYDROGN CONTAINING MATERIAL OF AT LEAST 500 MOLECULAR WEIGHT SELECTED FROM THE GROUP CONSISTING OF POLYETHER POLYOLS, POLYESTER POLYOLS AND HYDROCARBON POLYOLS, AN EXCESS OF ORGANIC POLYISOCYANATE RELATIVE TO THE REACTIVE HYDROGEN CONTAINING MATERIAL, WITH 80 TO 110 PERCENT BY WEIGHT OF 4,4'' -DIAMINO DIPHENYL DISULFIDE BASED ON SAID EXCESS NCO.
Claim 2
Dependent Claim
82 words
A HOMOGENEOUS POLYURETHANE HAVING A CRESCENT TEAR OF AT LEAST 300 POUNDS PER INCH AND PREPARED BY REACTING THE EXCESS NCO IN A POLYURETHANE REACTION MIXTURE CONSISTING ESSENTIALLY OF A REACTIVE HYDROGN CONTAINING MATERIAL OF AT LEAST 500 MOLECULAR WEIGHT SELECTED FROM THE GROUP CONSISTING OF POLYETHER POLYOLS, POLYESTER POLYOLS AND HYDROCARBON POLYOLS, AN EXCESS OF ORGANIC POLYISOCYANATE RELATIVE TO THE REACTIVE HYDROGEN CONTAINING MATERIAL, WITH 80 TO 110 PERCENT BY WEIGHT OF 4,4'' -DIAMINO DIPHENYL DISULFIDE BASED ON SAID EXCESS NCO.
References Cited (Backward Citations)
US3188302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |