Bulk polymerization process modified with solvent to reduce residual monomer content
Abstract
Abstract THE POLYMERIZATION OF A MONOMER SYSTEM IS IMPROVED BY THE PRESENCE OF 1 TO 30 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE SYSTEM OF A NON-POLYMERIZABLE, CHEMICALLY INERT, VOLATILE SOLVENT. THE SYSTEM IS CHARACTERIZED AS ONE WHICH: (1) IF BULK POLYMERIZED WOULD PRODUCE A POLYMER PRODUCT WHICH WOULD DEGRADE OR DEPOLYMERIZE UPON APPLICATION OF CONDITIONS NECESSARY TO REMOVE RESIDUAL MONOMER BY VOLATIZATION AND WHICH PRODUCT WOULD CONTAIN AMOUNTS OF RESIDUAL MONOMER SUFFICIENT TO AFFECT ITS PHYSICAL PROPERTIES; (2) IF BULK POLYMERIZED WOULD BE LIMITED IN REACTION RATE BY THE DIFFICULTY OF DIFFUSION OF MONOMER TO REACTIVE SITES, AND/OR (3) IF BULK POLYMERIZED WOULD PRODUCE A POLYMER PRODUCT WHICH WOULD LIMIT REACTION RATE OF FURTHER POLYMERIZATION BY INHIBITING DIFFUSION OF MONOMER TO REACTIVE SITES.
Inventors
- 👤 R Fellmann
- 👤 Whang J Jai
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |