Elastic polyurethane fibers
Abstract
Abstract IN THE SEGMENT POLYURETHANE POLYMERS CONSISTING AS THE MAIN COMPONENTS OF FIGUNCTIONAL LOW POLYMERIC COMPOUNDS HAVING TERMINAL ACTIVE HYDROGEN ATOMS, ORGANIC DIISOCYANATES AND DIAMINES, ELASTIC POLYURETHANE FIBERS SUBSTANTIALLY COMPRISING RECURRING UNITS OF THE GENERAL FORMULA -(NH-CO-(O-E-OOC-NH-R1-NH-CO)M-O-E-OOC-NH-R1)N-(NH-CO- NH-R2-NH-CO-NH-R1)Q WHEREIN E IS A RADICAL OF BIFUNCTIONAL LOW POLYMERIC COMPOUNDS HAVNG TERMINAL ACTIVE HYDROGEN ATOMS; R1 IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF 4,4''-METHYLENEBISCYCLOHEXYL, 4,4''-ISOPROPYLIDENEBISCYCLOHEXYL, 4,4''OXYBISCYCLOHEXYL AND 1,4-CYCLOHEXYLENE RADICALS; R2 IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF 1,4-CYCLOHEXYLENE RADICALS WITH OR WITHOUT METHYL AND ETHYL GROUPS ON THE RING; M IS FROM 0 TO 2; AND N AND Q ARE 1 OR 2 RESPECTIVELY, AND IN WHICH AT LEAST 50 PERCENT BY WEIGHT OF R1 HAS TRANS-TRANS CNFORMATION EXCEPT THE CASE WHERE R1 IS 1,4-CYCLOHEXYLENE IN WHICH AT LEAST 55 PERCENT BY WEIGHT HAS TRANS CONFORMATION AND AT LEAST 33 PERCENT BY WEIGHT OF R2 HAS TRANS CONFORMATION.
Inventors
- 👤 Isamu Suzuki
- 👤 Kiyoshi Ichikawa
- 👤 Yasuji Nakahara
- 👤 Kunico Kondo
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |