Chisso Corporation

Other

Chisso Petrochemical Corporation

Tsuyoshi Yahata

Toshihiro Uwai

Tsutomu Ushioda

Jun Saito

Masato Nakano

Masami Kimura

Hiroyuki Fujita

Yoshitoyo Yasuda

Yoshiyuki Ohgi

The present invention provides metallocene compounds which exhibit high polymerization activity for production of highly stereoregular polymers, as well as a production process for olefin polymers which employs olefin polymerization catalysts containing the compounds, and olefin polymers obtained by the production process. A metallocene compound of the present invention is represented by the following general formula (1):YKLMX&#x2003;&#x2003;(1)wherein M represents a titanium atom, zirconium atom or hafnium atom; K and L are fused rings coordinated to M and each independently represents a fused ring of a cyclopentadienyl ring and a 5-membered ring, a fused ring of a cyclopentadienyl ring and a 6-membered ring or a fused ring of a cyclopentadienyl ring and a 7-membered ring; Y is a bridge group crosslinking K and L; and each X is bonded to M; and K and L have a 2-furyl group, substituted 2-furyl group, 2-thienyl group, substituted 2-thienyl group, 2-furfuryl group or substituted 2-furfuryl group on at least one position among each of the 2-positions, 4-positions and 5-positions.

Metallocene compounds, production process for olefin polymers using catalysts containing them and olefin polymers produced by the production process

An elastomeric polypropylene wherein (a) an isotactic pentad (I ) is 0.150-0.749, (b) a different bond due to a 2,1-insertion reaction is 0.11-20 mol %, (c) a different bond due to a 1,3-insertion reaction is 0-10 mol % and (d) a melting point (Tm) is 50-160&deg; C., (a) to (c) being determined from C NMR spectra, which is obtainable by the polymerization of propylene using any one of a metallocene catalyst (I) comprising a metallocene compound (A), an activating compound (B) and if desired, an organoaluminum compound (C), a supported metallocene catalyst (II) prepared by supporting the metallocene catalyst (I) on a finely particulate support (D), and a supported metallocene catalyst (III) prepared by adding an organoaluminum compound (E) to the supported metallocene catalyst (II). In particular, it has excellent transparency and elastic characteristics.

Elastomeric polypropylene

Supported metallocene catalyst, process for preparing the same, and process for producing olefin polymers

A process for producing a propylene//propylene/olefin block copolymer, characterized by using as a supported metallocene catalyst a solid product obtained by conducting, in this order, the step (a) of reacting an organic transition metal compound having two crosslinked conjugated &pgr;-electron ligands with an aluminoxane in an inert solvent, the step (b) of contacting the reaction product obtained in the step (a) with a finely particulate inorganic support in the presence of an inert solvent at 85 to 150&deg; C., and the step (c) of washing the slurry containing a solid product yielded in the step (b) with an aliphatic hydrocarbon at least twice at &minus;50 to 50&deg; C.; and a propylene//propylene/olefin block copolymer produced by said process.

Propylene/propylene/olefin block copolymer and process for producing the same

Growing community of inventors

Ichihara, Japan

Tsuyoshi Yahata