Presence of a New Species of Titanium-Titanochloroform

Shiihara, Isao; Iyoda, Jun; Sugita, Kazuko

doi:10.1246/bcsj.35.364

Cited by 6 publications

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Stereospecific polymerization of isoprene with alano‐derivatives and titanium compounds. II. Catalytic systems employing nitrogen‐containing derivatives of aluminum hydride and TiCl₄

et al. 1964

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Results obtained in the stereospecific polymerization of isoprene with catalytic systems including TiCl, and halogen-alane compounds complexed with trialkylamines, or aluminum hydride derivatives containing Al-N or A1-0 bonds, have been reported.In such systems, the Al/Ti ratio has an influence not only on the rate of conversion, but also on the steric composition and the molecular weight of the polymer obtained.The catalytically active compounds obtained by the reaction have been isolated and analysed.The polymerization takes place in heterogeneous phase. ZUSAMMENFASSUNG:Die stereospezifische Polymerisation von Isopren mit katalytischen Systemen aus TiCl, und Halogenhydriden von Aluminium (mit komplex gebundenen Trialkylaminen) oder Aluminium-hydriden, die Al-N-oder Al-0-Bindungen enthalten, wird untersucht.Polymerisationsgeschwindigkeit, sterische Struktur und Molekulargewicht der erhaltenen Polymeren sind von dem Molverhaltnis Al/Ti abhangig. Die katalytisch wirksamen Verbindungen wurden isoliert und analysiert.Die Polymerisation verlauft in heterogener Phase.

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Stereospecific polymerization of isoprene with alano‐derivatives and titanium compounds. II. Catalytic systems employing nitrogen‐containing derivatives of aluminum hydride and TiCl₄

et al. 1964

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Stereopecific polymerization of isoprene with alano‐derivatives and titanium compounds. III. Catalysts based on poly(N‐alkyliminoalanes) and TiCl₄

1969

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The stereospecific polymerization of isoprene catalyzed by a new class of aluminum hydride derivatives and titanium tetrachloride is described. Such derivatives, the poly-(iminoalanes), are characterized by a polymeric structure (HAlNR), in which R is an alkyl or phenyl group. Peculiar feature of this class of co-catalysts is the ability to give practically gel-free isoprene polymers of high 1.44s content and having a considerably higher molecular weight than that obtained by other aluminum hydride based catalysts.The polymerization process is herein described taking in account reaction variables such as M/Ti mole ratio, catalyst and monomer concentration and polymerization temperature. ZUSAMMENFASSUNG:Isopren wurde stereospezifisch polymerisiert, und zwar mit einem neuen Katalysatorsystem auf der Basis von Aluminiumhydrid-Derivaten und Titantetrachlorid. Diese Derivate, die Polyiminoalane, haben die Struktur (HAINR)n, wobei R eine Alkyl-oder Phenylgruppe sein kann. Die Besonderheit dieser Katalysatorsysteme ist es, ein praktisch gelfreies Polyisopren mit einem hohen Anteil an 1.4-cis-Bausteinen zu geben. Auch die Molekulargewichte sind hoher als bei der Vekendung anderer Katalysatoren auf der Basis von Aluminiumhydrid. Die Abhangigkeit der Polymerisation vom AI/Ti-Verhiiltnis, der Reaktionstemperatur und den Konzentrationen von Katalysator und Monomerem wird beschrieben.

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Effect of polymethylhydrosiloxane on propylene polymerization catalyzed by Ziegler catalyst

Shiihara¹,

Kawai²,

Ichihashi³

1962

J. Polym. Sci.

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Polymethylhydrosiloxane was added to the Ziegler catalyst in propylene polymerization, and a kinetic study carried out for this system was in good agreement with the results obtained in the polymerization carried out in an autoclave under pressure. The experimental equations for polymerization rate are for constant siloxane and AlEt3 concentrations and for constant siloxane and TiCl4 concentrations, where α, A, and β are constants. From experimental results of studies of the chemical properties of polymethylhydrosiloxane, a reasonable reaction mechanism was proposed which can explain the experimental results in the polymerization process. The polymers were separated by use of several solvents, and both the residue and extracted parts showed the presence of silicon. On the basis of chemical analysis and infrared absorption spectra, it was concluded that the polymers obtained were copolymers of polypropylene and polymethylsiloxane.

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Presence of a New Species of Titanium-Titanochloroform

Cited by 6 publications

References 1 publication

Stereospecific polymerization of isoprene with alano‐derivatives and titanium compounds. II. Catalytic systems employing nitrogen‐containing derivatives of aluminum hydride and TiCl₄

Stereospecific polymerization of isoprene with alano‐derivatives and titanium compounds. II. Catalytic systems employing nitrogen‐containing derivatives of aluminum hydride and TiCl₄

Stereopecific polymerization of isoprene with alano‐derivatives and titanium compounds. III. Catalysts based on poly(N‐alkyliminoalanes) and TiCl₄

Effect of polymethylhydrosiloxane on propylene polymerization catalyzed by Ziegler catalyst

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Presence of a New Species of Titanium-Titanochloroform

Cited by 6 publications

References 1 publication

Stereospecific polymerization of isoprene with alano‐derivatives and titanium compounds. II. Catalytic systems employing nitrogen‐containing derivatives of aluminum hydride and TiCl4

Stereospecific polymerization of isoprene with alano‐derivatives and titanium compounds. II. Catalytic systems employing nitrogen‐containing derivatives of aluminum hydride and TiCl4

Stereopecific polymerization of isoprene with alano‐derivatives and titanium compounds. III. Catalysts based on poly(N‐alkyliminoalanes) and TiCl4

Effect of polymethylhydrosiloxane on propylene polymerization catalyzed by Ziegler catalyst

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Stereospecific polymerization of isoprene with alano‐derivatives and titanium compounds. II. Catalytic systems employing nitrogen‐containing derivatives of aluminum hydride and TiCl₄

Stereospecific polymerization of isoprene with alano‐derivatives and titanium compounds. II. Catalytic systems employing nitrogen‐containing derivatives of aluminum hydride and TiCl₄

Stereopecific polymerization of isoprene with alano‐derivatives and titanium compounds. III. Catalysts based on poly(N‐alkyliminoalanes) and TiCl₄