THREE AND FOUR ATOM BRIDGED DICARBONATE COMPOUNDS AS INTERNAL DONORS IN CATALYSTS FOR POLYPROPYLENE MANUFACTURE

摘要

A SOLID, HYDROCARBON-INSOLUBLE, CATALYST COMPONENT USEFUL IN POLYMERIZING OLEFINS, SAID CATALYST COMPONENT CONTAINING MAGNESIUM, TITANIUM, AND HALOGEN, AND FURTHER CONTAINING AN INTERNAL ELECTRON DONOR HAVING A STRUCTURE: [R1-O-C(O)-O-]?R? WHEREIN R? IS INDEPENDENTLY AT EACH OCCURRENCE, AN ALIPHATIC OR AROMATIC HYDROCARBON, OR SUBSTITUTED HYDROCARBON GROUP CONTAINING FROM 1 TO 20 CARBON ATOMS; x IS 2-4; AND R? IS AN ALIPHATIC OR AROMATIC HYDROCARBON, OR SUBSTITUTED HYDROCARBON GROUP CONTAINING FROM 1 TO 20 CARBON ATOMS, PROVIDED THAT THERE ARE FROM 3 TO 4 ATOMS IN THE SHORTEST CHAIN CONNECTING A FIRST R?-O-C(O)-O- GROUP AND A SECOND R?-O-C(O)-O- GROUP. (NO SUITABLE