US3334110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing epoxyoxazolidinones
Assignee: Avantor Performance Materials LLC
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Filing: 1965-08-16
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Granted: 1967-08-01
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Expires: 1985-08-16
Abstract
No abstract record available.
Inventors
- 👤 Charles H Schramm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:49
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/26; C08G18/00; C08G18/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS FOR PREPARING A SUBSTITUTED 2-OXAZOLIDINONE HAVING AT LEAST ONE EPOXY-CONTAINING SUBSTIUENT WHICH COMPRISES: (A) REACTING A POLYISOCYANATE WITH A POLYEPOXIDE, SAID POLYEPOXIDE CHARACTERIZED BY HAVING AN OXYGEN ATOM ATTACHED TO 2 ADJACENT CARBON ATOMS FOR EACH EPOXY GROUP, WHEREIN THE TOTAL NUMBER OF EPOXY GROUPS IS GREATER THAN THE TOTAL NUMBER OF ISOCYANATE GROUPS REACTED THEREWITH; IN (B) THE PRESENCE OF A CATALYST MIXTURE COMPRISING FROM .005% TO ABOUT 15% BY WEIGHT OF SAID POLYISOCYANATE AND POLYEPOXIDED, OF (1) AN ADDITION POLYMERIZATION CATALYST SELECTED FROM THE GROUP CONSISTING OF TERTIARY AMINES AND QUATERNARY AMMONIUM HALIDES AND (2) A PRIMARY OR SECONDARY ALKANOL HAVING FROM 1 TO 6 CARBON ATOMS.
Claim 2
Dependent Claim
111 words
A PROCESS FOR PREPARING A SUBSTITUTED 2-OXAZOLIDINONE HAVING AT LEAST ONE EPOXY-CONTAINING SUBSTIUENT WHICH COMPRISES: (A) REACTING A POLYISOCYANATE WITH A POLYEPOXIDE, SAID POLYEPOXIDE CHARACTERIZED BY HAVING AN OXYGEN ATOM ATTACHED TO 2 ADJACENT CARBON ATOMS FOR EACH EPOXY GROUP, WHEREIN THE TOTAL NUMBER OF EPOXY GROUPS IS GREATER THAN THE TOTAL NUMBER OF ISOCYANATE GROUPS REACTED THEREWITH; IN (B) THE PRESENCE OF A CATALYST MIXTURE COMPRISING FROM .005% TO ABOUT 15% BY WEIGHT OF SAID POLYISOCYANATE AND POLYEPOXIDED, OF (1) AN ADDITION POLYMERIZATION CATALYST SELECTED FROM THE GROUP CONSISTING OF TERTIARY AMINES AND QUATERNARY AMMONIUM HALIDES AND (2) A PRIMARY OR SECONDARY ALKANOL HAVING FROM 1 TO 6 CARBON ATOMS.
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |