METHOD OF PREPARING STEREOREGULAR POLYPROPYLENE

chemistry of polymers, particularly, chemical industry, more specifically manufacture of plastic materials. SUBSTANCE: described is method of preparing stereoregular polypropylene by polymerization of propylene in liquid monomer by heating in the presence of homogeneous catalyst system based on zirc...

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Bibliographische Detailangaben
Hauptverfasser:	SAVINOV D.V, TSVETKOVA V.I, LEMENOVSKIJ D.A, ALADYSHEV A.M, KLJAMKINA A.N, NEDOREZOVA P.M, VEKSLER EH.N, BRUSOVA G.P
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	chemistry of polymers, particularly, chemical industry, more specifically manufacture of plastic materials. SUBSTANCE: described is method of preparing stereoregular polypropylene by polymerization of propylene in liquid monomer by heating in the presence of homogeneous catalyst system based on zirconocene and methyl alumoxane. Polymerization process includes prepolymerization stage at lower temperature, for which purpose methyl alumoxane solution in toluene is added into thermostated reactor filled with liquid propylene, zirconocene solution in toluene solution of methyl alumoxane is then added and stirred at 5-12 C for 5-7 min and temperature in reactor is then raised to 50-70 C, and polymerization is continued. EFFECT: simplified process. 10 cl, 2 dwg, 1 tbl