Copolyamides of 2,2-bis(4-aminocyclohexyl)propanes and a mixture of alkane dicarboxylic acids
Abstract
Abstract 1. A COMPOSITION OF MATTER CAPABLE OF BEING COMPRESSION MOLDED AND CONSISTING ESSENTIALLY OF THE COPOLYAMIDE OF (A) AT LEAST ONE OF 2,2-BIS(4-AMINOCYCLOHEXYL) PROPANE OR METHYL DERIVATIVE THEREOF HAVING THE FORMULA H2N-(R-CYCLOHEX-1,4-YLENE)-C(-CH3)2-(R- CYCLOHEX-1,4-YLENE)-NH2 WHEREIN R IS HYDROGEN OR METHYL AND, (B) A MIXTURE OF DICARBOXYLIC ACIDS CONSISTING ESSENTIALLY OF FROM ABOUT 20 TO ABOUT 65 MOLE PERCENT OF ADIPIC ACID AND FROM ABOUT 35 TO ABOUT 80 MOLE PERCENT OF AT LEAST ONE ACID SELECTED FROM THE GROUP CONSISTING OF SUBERIC ACID, AZELAIC ACID, SEBACIC ACID AND DODECANEDIOIC ACID, SAID 2,2-BIS(4-AMINOCYCLOHEXYL)PROPANE AND METHYL DERIVATIVE BEING EMPLOYED IN A RATIO OF ABOUT 1 MOLE PER MOLE OF SAID MIXTURE OF DICARBOXYLIC ACIDS.
Inventors
- 👤 R Shue
- 👤 R Campbell
Bibliographic Details
Claims Analysis
Total Claims: 2References 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) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |