US2993870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of trimerizing organic isocyanates
Assignee: Uniroyal Inc
•
Filing: 1957-08-20
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Granted: 1961-07-25
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Expires: 1977-08-20
Abstract
No abstract record available.
Inventors
- 👤 Burkus John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:07
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/02; C08G18/022; Y; Y10; Y10S; Y10S521/00; Y10S521/902
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
114 words
A METHOD FOR MAKING A CROSS-LINKED INSOLUBLE PRODUCT FROM A MATERIAL CONTAINING AT LEAST TWO AROMATIC ISOCYANATE GROUPS PER MOLECULE SAID MATERIAL BEING THE REACTION PRODUCT OF A STOICHIOMETRIC EXCESS OF AN AROMATIC DIISOCYANATE WITH A POLYESTER TERMINATED BY ALCOHOLIC HYDROXYL GROUPS, SAID POLYESTER BEING A CONDENSATION POLYMER OF A DIHYDRIC ALCOHOL WITH AN ALIPHATIC DICARBOXYLIC ACID, WHICH COMPRISES ADDING TO SAID MATERIAL AT LEAST ABOUT 0.1 MOLE PER 100 MOLES OF SAID ISOCYANATE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF (1) N,N''N" - TRIS - DIALKYLAMINOALKYL - SYM - HEXAHYDROTRIAZINE AND (2) MIXTURES COMPRISING A N,N'',N"-TRIALKYLSYM-HEXAHYDROTRIAZINE AND A TERTIARY ALIPHATIC AMINE IN WHICH THE AFORESAID ALKLY GROUPS ARE LOWER ALKYL RADICALS,
Claim 2
Independent Claim
114 words
A METHOD FOR MAKING A CROSS-LINKED INSOLUBLE PRODUCT FROM A MATERIAL CONTAINING AT LEAST TWO AROMATIC ISOCYANATE GROUPS PER MOLECULE SAID MATERIAL BEING THE REACTION PRODUCT OF A STOICHIOMETRIC EXCESS OF AN AROMATIC DIISOCYANATE WITH A POLYESTER TERMINATED BY ALCOHOLIC HYDROXYL GROUPS, SAID POLYESTER BEING A CONDENSATION POLYMER OF A DIHYDRIC ALCOHOL WITH AN ALIPHATIC DICARBOXYLIC ACID, WHICH COMPRISES ADDING TO SAID MATERIAL AT LEAST ABOUT 0.1 MOLE PER 100 MOLES OF SAID ISOCYANATE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF (1) N,N''N" - TRIS - DIALKYLAMINOALKYL - SYM - HEXAHYDROTRIAZINE AND (2) MIXTURES COMPRISING A N,N'',N"-TRIALKYLSYM-HEXAHYDROTRIAZINE AND A TERTIARY ALIPHATIC AMINE IN WHICH THE AFORESAID ALKLY GROUPS ARE LOWER ALKYL RADICALS,
Claim 3
Dependent Claim
39 words
A METHOD AS SET FORTH IN CLAIM 11, IN WHICH THE REACTION MIXTURE COMPRISES WATER, WHEREBY SAID MIXTURE IS FOAMED WHILE IT IS STILL FLUID, AND SUBSEQUENTLY SOLIFIFIES WHILE STILL FOAMED TO PRODUCE A SOLID FOAMED HIGH POLYMERIC MATERIAL.
References Cited (Backward Citations)
US1471213A
Cited
US2801244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |