Graft polymerization of vinyl halide on an elastomer in the presence of a mercaptan
Abstract
Abstract VINYL HALIDE POLYMERS WHICH EXHIBIT IMPROVED PROCESSING CHARACTERISTICS WITHOUT SACRIFICING PHYSICAL PROPERTIES ARE PREPARED BY POLYMERIZING VINYL HALIDE MONOMER IN THE PRESENCE OF: (1) AN ALIPHATIC MERCAPTAN IN AN AMOUNT BASED ON -SH EQUIVALENCE OF FROM ABOUT 0.000075 TO ABOUT 0.05 EQUIVALENCE -SH PER MOLE OF MONOMERIC MATERIAL, AND (2) FROM ABOUT 0.01 TO ABOUT 1% BY WEIGHT OF A POLYMERIZABLE ORGANOSOLVENT SOLUBLE UNSATURATED DIENE ELASTOMER SUCH AS POLYBUTADIENE, STYRENE/BUTADIENE COPOLYMER, OR NATURAL RUBBER. THE MONOMER IS PREFERABLY 100% VINYL CHLORIDE THOUGH MINOR AMOUNTS OF OTHER ETHYLENICALLY UNSATURATED MONOMERS CAN ALSO BE USED. THE MERCAPTAN IS PREFERABLY A POLYMERCAPTAN HAVING AT LEAST 3 AND MORE PREFERABLY FROM 3 TO 5 MERCAPTAN GROUPS PER MOLECULE.
Inventors
- 👤 Sheldon F Gelman
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |