Thermoplastic plastic composition
Abstract
Abstract REVERSIBLE CROSS-LINKING IS IMPARTED TO POLYMERS AND COPOLYMERS ESPECIALLY OF THE VINYL, OLEFINIC AND OLEFINIC OXIDE TYPES BY MEANS OF RECURRING DICYCLOPENTADIENE LINKAGES. DIFUNCTIONAL DICYCLOPENTADIENE COMPOUNDS CAN BE POLYMERIZED DIRECTLY INTO HOMOPOLYMERS OR POLYMERIZED WITH COMONOMERS TO FORM COPOLYMERS. ALTERNATIVELY, POLYMERS CARRYING CYCLOPENTADIENE SUBSTITUENTS CAN BE PREPARED AND THE DIMERIZATION OF THE CYCLOPENTADIENE GROUPS EFFECTED IN SITU TO PRODUCE THE CROSS-LINKAGES. THE DICYCLOPENTADIENE CROSS-LINKAGES CLEAVE ON HEATING TO A SUFFICIENT TEMPERATURE SO THAT THE PRESENT POLYMERS AND COPOLYMERS HAVE A THERMOPLASTIC CHARACTER NOTWITHSTANDING THEIR NORMAL CROSS-LINKED NETWORK STRUCTURE.
Inventors
- 👤 Y Hirai
- 👤 M Uchiyama
- 👤 Y Takeshita
- 👤 M Uoi
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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |