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US2907752A
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Synthetic rubbery polyester-polyisocyanate polymers
Assignee: Uniroyal Inc
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Filing: 1954-09-14
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Granted: 1959-10-06
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Expires: 1974-09-14
Abstract
No abstract record available.
Inventors
- 👤 Frank B Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:54
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S528/00; Y10S528/903; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A METHOD COMPRISING MIXING THAT QUANTITY OF A LINEAR POLYESTER-DIISOCYANATE INTERMEDIATE OBTAINED BY ANHYDROUS REACTION OF 1 MOLE OF A LINEAR POLYESTER CONTAINING TERMINAL HYDROXYL GROUPS AND HAVING A HYDROXYL NUMBER OF 20 TO 120 AND AN ACID VALUE LESS THAN 2, AND 2 MOLES OF A DIISOCYANATE OF THE FORMULA OCN-RNCO, WHEREIN R IS A DIVALENT HYDROCARBON RADICAL, WITH FROM 0.5 TO 0.9 MOLE OF WATER TO PROVIDE A PROCESSIBLE, CURABLE, UNSTABLE GUM CONTAINING REACTIVE ISOCYANATE GROUPS, AND SUBSEQUENTLY MILLING 100 PARTS OF SAID GUM WITH FROM 1 TO 10 PARTS OF A POLYISOCYANATE OF THE FORMULA R(-NCO)X WHERE R IS A POLYVALENT HYDROCARBON RADICAL HAVING A VALENCE NOT GREATER THAN 3 AND X HAS THE SAME VALUE AS SAID VALENCE, AT A TEMPERATURE OF ABOUT 65* TO 85* C. WHEREBY SAID CURABLE GUM IS RENDERED CAPABLE OF YIELDING A MORE HIGHLY CROSS-LINKED PRODUCT THAN WOULD BE OBTAINED WITHOUT SAID TREATMENT WITH POLYISOCYANATE.
Claim 2
Independent Claim
154 words
A METHOD COMPRISING MIXING THAT QUANTITY OF A LINEAR POLYESTER-DIISOCYANATE INTERMEDIATE OBTAINED BY ANHYDROUS REACTION OF 1 MOLE OF A LINEAR POLYESTER CONTAINING TERMINAL HYDROXYL GROUPS AND HAVING A HYDROXYL NUMBER OF 20 TO 120 AND AN ACID VALUE LESS THAN 2, AND 2 MOLES OF A DIISOCYANATE OF THE FORMULA OCN-RNCO, WHEREIN R IS A DIVALENT HYDROCARBON RADICAL, WITH FROM 0.5 TO 0.9 MOLE OF WATER TO PROVIDE A PROCESSIBLE, CURABLE, UNSTABLE GUM CONTAINING REACTIVE ISOCYANATE GROUPS, AND SUBSEQUENTLY MILLING 100 PARTS OF SAID GUM WITH FROM 1 TO 10 PARTS OF A POLYISOCYANATE OF THE FORMULA R(-NCO)X WHERE R IS A POLYVALENT HYDROCARBON RADICAL HAVING A VALENCE NOT GREATER THAN 3 AND X HAS THE SAME VALUE AS SAID VALENCE, AT A TEMPERATURE OF ABOUT 65* TO 85* C. WHEREBY SAID CURABLE GUM IS RENDERED CAPABLE OF YIELDING A MORE HIGHLY CROSS-LINKED PRODUCT THAN WOULD BE OBTAINED WITHOUT SAID TREATMENT WITH POLYISOCYANATE.
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) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |