US3148173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane-ureas containing urealinked nu-(2-hydroxypropyl) alkylene diamines
Assignee: Wyandotte Chemicals Corp
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Filing: 1959-01-26
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Granted: 1964-09-08
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Expires: 1979-01-26
Abstract
No abstract record available.
Inventors
- 👤 Seymour L Axelrood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:52
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PROCESS FOR THE PRODUCTION OF A NOVEL HIGH MOLECULAR WEIGHT POLYURETHANE-UREA POLYMER, CHARACTERIZED BY AN IMPROVED TENSILE STRENGTH TO HARDNESS RATIO, AND WHICH CONTAINS UREA-LINKED N-(2-HYDROXYPROPYL) ALKYLENE DIAMINE RADICALS, ONE OF THE NITOGEN ATOMS OF EACH UREA BRIDGE BEING PROVIDED BY THE SAID DIAMINE, WHICH CONSISTS IN MIXING AND REACTING TOGETHER (1) AN ISOCYANATE-TERMINATED POLYURETHANE POLYMER FORMED FROM (A) A POLYMERIA GLYCOL HAVING A MOLECULAR WEIGHT OF AT LEAST 250, AND BEING SELECTED FROM THE GROUP CONSISTING OF POLYALKYLENE ETHER GLYCOLS AND POLYESTER GLYCOLS, AND (B) AN ORGANIC POLYISOCYANATE, AND ABOUT 0.5 TO 1.5 AMINE EQUIVALENTS OF (II) PER EQUIVALENT OF (I), (II) BEING AN N-(2-HYDROXYPROPYL)ALKYLENE DIAMINE, TO PRODUCE AN N-(2-HYDROXYPROPYL) ALKYLENE DIAMINE CONTAINING POLYURETHANE-UREA POLYMER CHARACTERIZED BY THE PRESENCE OF RECURRING STRUCTURAL UREA LINKAGES OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
130 words
A PROCESS FOR THE PRODUCTION OF A NOVEL HIGH MOLECULAR WEIGHT POLYURETHANE-UREA POLYMER, CHARACTERIZED BY AN IMPROVED TENSILE STRENGTH TO HARDNESS RATIO, AND WHICH CONTAINS UREA-LINKED N-(2-HYDROXYPROPYL) ALKYLENE DIAMINE RADICALS, ONE OF THE NITOGEN ATOMS OF EACH UREA BRIDGE BEING PROVIDED BY THE SAID DIAMINE, WHICH CONSISTS IN MIXING AND REACTING TOGETHER (1) AN ISOCYANATE-TERMINATED POLYURETHANE POLYMER FORMED FROM (A) A POLYMERIA GLYCOL HAVING A MOLECULAR WEIGHT OF AT LEAST 250, AND BEING SELECTED FROM THE GROUP CONSISTING OF POLYALKYLENE ETHER GLYCOLS AND POLYESTER GLYCOLS, AND (B) AN ORGANIC POLYISOCYANATE, AND ABOUT 0.5 TO 1.5 AMINE EQUIVALENTS OF (II) PER EQUIVALENT OF (I), (II) BEING AN N-(2-HYDROXYPROPYL)ALKYLENE DIAMINE, TO PRODUCE AN N-(2-HYDROXYPROPYL) ALKYLENE DIAMINE CONTAINING POLYURETHANE-UREA POLYMER CHARACTERIZED BY THE PRESENCE OF RECURRING STRUCTURAL UREA LINKAGES OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2621166A
Cited
US2929800A
Cited
US2663729A
Cited
US2929803A
Cited
US2843569A
Cited
US2953489A
Cited
US2927098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |