Process for producing modified propylene polymer
Abstract
Abstract MODIFIED PROPYLENE POLYMER IS PROVIDED HAVING IMPROVED IMPACT RESISTACE AND TOUGHNESS AT LOW TEMPERATURE AS WELL AS HAVING A HIGH SOFTENING POINT AND STIFFNESS. THE MODIFIED PROPYLENE POLYMER IS PRODUCED BY A PROCESS OF POLYMERIZING A MEMBER OF THE GROUP CONSISTING OF PROPYLENE AND ETHYLENE AND SUBSEQUENTLY POLYMERIZING CONTINUOUSLY IN THE SAME SYSTEM THE OTHER MEMBER OF SAID GROUP, SAID POLYMERIZATION BEING EFFECTED AT A TEMPERATURE OF 30-100*C., AT A PRESSURE OF FROM 1-10 ATMOSPHERS AND UTILIZING AS CATALYSTS DIALKYLALUMINUM MONOHALIDE AND TITANIUM TRICHLORIDE, THE POLYMERIZATION OF ETHYLENE BEING EFFECTED IN THE PRESENCE OF AN AVERAGE AMOUNT OF FROM 0-25% BY VOLUME OF PROPYLENE AND THE AMOUNTS OF ETHYLENE AND PROPYLENE FED TO THE REACTION SYSTEM BEING ADJUSTED SO THAT THE RESULTING MODIFIED PROPYLENE POLYMER CONTAINS FROM 5 TO 40% BY WEIGHT ETHYLENE.
Inventors
- 👤 Junichi Fukuda
- 👤 Kijuro Tashiro
- 👤 Mutsuo Sennari
- 👤 Kenjiro Nagashima
Bibliographic Details
Claims Analysis
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