Inhibiting prevulcanization of rubber with polyfunctional methacrylate monomers as cross-linking coagents with peroxides
Abstract
Abstract PREVULCANIZATION OF ELASTOMER IS INHIBITED BY INCORPORATING CRITICAL AMOUNTS OF N-NITROSO DIPHENYLAMINE OR N,N''-DINITROSO-PARA-PHENYL DIPHENYLAMINE AS RETARDER, NORMALLY 0.2-2.0% BASED ON THE PARTS OF ELASTOMER, IN POLYFUNCTIONAL ACRYLATE CROSS-LINKING MONOMER WHICH IS LIQUID AT MIXING TEMPERATURES AND SERVES TO PLASTICIZE THE RUBBER AND IS USED IN AMOUNTS OF ABOUT 2 TO 30 PARTS PER 100 PARTS OF ELASTOMER. IN THE PRESENCE OF ABOUT 5 TO 30% OF THE RETARDER IN THE MONOMER, THE LIQUID ACRYLATE CROSSLINKING MONOMER PROVIDES LONG MOONEY SCORCH TIME BUT STILL PERMITS EFFICIENT CROSS-LINKING TO PROVIDE SUPERIOR VULCANIZATES AS COMPARED WITH STRAIGHT PEROXIDE VULCANIZATES. THIS FACILITATES CONTROL OF VULCANIZATION DURING INJECTION MOLDING, EXTRUSION, COMPRESSION MOLDING AND CALENDERING.
Inventors
- 👤 J Cornell
- 👤 G Cowperthwaite
- 👤 J Lohr
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |