Isocyanatostilbenes
Abstract
Abstract MONO- AND DIISOCYANATO-STILBENES HAVING IN ONE PHENYL RING AT LEAST ONE ISOCYANATO GROUP AND, IN THE OTHER PHENYL RING, FROM 1 TO 3 ALKOXY SUBSTITUENTS ARE PREPARED BY PHOSGENATION OF THE CORRESPONDING AMINES. THE LATTER ARE PREPARED BY CONVENTIONAL PROCEDURES. BOTH CIS- AND TRANSISOMERS OF THE STILBENES ARE DESCRIBED. THE MONOISOCYANATO AND MONO-AMINO-STILBENES ARE USEFUL, BY VIRTUE OF FLUORESCENCE IN U.V. LIGHT, AS OPTICAL BRIGHTENING AGENTS, FOR ''TAGGING" MOLECULES CONTAINING ACTIVE H ATOMS (FOR THE ISOCYANATES) OR ANHYDRIDE GROUPS (FOR THE AMINES) AND IN THE PREPARATION OF PHOTORESIST POLYMERS. THE DIISOCYANATES AND DIAMINES ARE USEFUL IN THE PREPARATION OF LIGHT SENSITIVE POLYMERS.
Inventors
- 👤 Durvasula V Rao
- 👤 Adnan A R Sayigh
- 👤 Henri Ulrich
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |