Diisocyanates
Abstract
Abstract NEW 1,3-DI-($-ISOCYANATOPROPYL)-HYDANTOINS AND -DIHYURACILS, FOR EXAMPLE 1,3-DI-($-ISOCYANATOPROPYL)-5,5-DIMETHYLHYDANTOIN OR 1,3-DI-($-ISOCYANATOPROPYL)5,5-DIMETHYL-5,6-DIHYDROURACIL AND THEIR USE FOR THE MANUFACTURE OF POLYURETHANES BY REACTION WITH POLYHYDROXYL COMPOUNDS. THE NEW DIISOCYANATES ARE COMPLETELY ODOURLESS; IRRITATION OF THE MUCUS MEMBRANES WAS NOT DETECTABLE; THEY ARE THEREFORE PREDERABLY USED IN THE LAQUER FIELD. THE NEW DIISOCYANATES REACT SIGNIFICANTLY MORE RAPIDLY WITH PRIMARY ALCOHOLS THAN DO ALIPHATIC DIISOCYANATES, FOR EXAMPLE 1,6-HEXAMETHYLENEDIISOCYANATE, AND ON THE OTHER HAND MORE SLOWLY THAN AROMATIC DIISOCYANATES, FOR EXAMPLE, 1,4-TOLUYLENEDIISOCYANATE.
Inventors
- 👤 Theobald Haug
- 👤 Hans Batzer
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |