POLYOLEFIN PRODUCTION

PROBLEM TO BE SOLVED: To provide a method for producing short sequence syndiotactic/isotactic block polyolefins.SOLUTION: In the method for producing short sequence syndiotactic/isotactic block polyolefins, a C1 symmetric metallocene compound of general formula: R''(CpR)(Cp'R') M...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	RAZAVI ABBAS, HORTMANN KAI
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 GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS THEIR PREPARATION OR CHEMICAL WORKING-UP
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for producing short sequence syndiotactic/isotactic block polyolefins.SOLUTION: In the method for producing short sequence syndiotactic/isotactic block polyolefins, a C1 symmetric metallocene compound of general formula: R''(CpR)(Cp'R') MQis used as a catalyst component, where each R is independently aryl or hydrocarbyl having 1 to 20 carbon atoms, Cp is a substituted cyclopentadienyl and at least position 3 of Cp is substituted with aryl, and at least one other position of Cp is substituted with a non-bulky substituent, and n is an integer in the range from 2 to 4; Cp' is substituted or unsubstituted fluorenyl; each R' is independently hydrocarbyl having 1 to 20 carbon atoms and m is O or an integer in the range from 1 to 8; R'' is a bridge between Cp and Cp'; M is a metal from group IIIB, IVB, VB or VIB; Q is hydrocarbyl having 1 to 20 carbon atoms or a halogen; and p is the valence of M minus 2.