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Propene polymerization with the MgCl2-supported dichlorobis(β-diketonato)titanium catalysts activated by ordinary alkylaluminums

✍ Scribed by Kazuo Soga; Eiichi Kaji; Toshiya Uozumi

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
132 KB
Volume
36
Category
Article
ISSN
0887-624X

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✦ Synopsis

Several kinds of dichlorobis( b-diketonato)titanium complexes, i.e., Ti(acetylacetonato) 2 Cl 2 , Ti(1-benzoylacetonato) 2 Cl 2 , Ti(2,2,6,6-tetramethyl-3,5-heptanedionato) 2 Cl 2 and Ti(4,4,4-trifluoro-1-phenyl-1,3-butanedionato) 2 Cl 2 , were synthesized and the corresponding MgCl 2 -supported catalysts were prepared by impregnation method. The test of them for propene polymerization revealed that those MgCl 2 -supported catalysts could be activated not only by methylaluminoxane (MAO) but also by ordinary alkylaluminums as well. The effect of typical Lewis bases on the catalyst performance was investigated in some detail, which indicated that organic silanes are most effective for the improvement of isospecificity of those catalysts.

📜 SIMILAR VOLUMES

Ethene–propene copolymerization with the
Ethene–propene copolymerization with the MgCl2-supported dichlorobis(4,4,4-trifluoro-1-phenyl- 1,3-butanedionato)titanium catalyst activated by an ordinary trialkylaluminum
✍ Eiichi Kaji; Toshiya Uozumi; Jizhu Jin; Tsuneji Sano; Kazuo Soga 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 128 KB 👁 1 views

The Ti(BFA) 2 Cl 2 /MgCl 2 -Al(C 2 H 5 ) 3 catalyst (BFA ϭ 4,4,4-trifluoro-1-phenyl-1,3-butanedione) modified by DIPDMS (diisopropyldimethoxysilane), which had been proved to yield an extremely high isotactic polypropene in high selectivity, was tested for the copolymerization of ethene with propene