| abstract |
THE INVENTION REFERS TO SUPPORTED METALLOCHEN CATALYST SYSTEMS, OPTIONALLY POLYMERIZED WITH OLEPHINIC MONOMERES, PREFERABLY ETHYLENE OR PROPYLENE, USEFUL IN THE POLYMERIZATION OF ETHYLENE TO ISOTACTIC POLYPROPYLENE. ISOTACTICALLY OBTAINED POLYPROPYLENE GENERALLY HAS A MOLECULAR WEIGHT OF APPROXIMATELY 100,000 G / M OR MORE, A FOUNDRY POINT OF APPROXIMATELY 140 DEGREES C OR GREATER AND A GRANULAR MORPHOLOGY. THE SUPPORTED CATALYST SYSTEM GENERALLY HAS A HIGH CATALYTIC ACTIVITY, AND WHEN USED IN A POLYMERIZATION REACTOR RESULTS IN A PROCESS WITH A BLOCK, DETERIORATION, ETC. OF THE MINIMUM OR NULL REACTOR. |