Chisso Corporation

Chisso Petrochemical Corporation

Toshihiro Uwai

Akihiro Sato

Masami Tachibana

Kenji Matsuda

Kazutsune Kikuta

Jun Saito

Tsutomu Ushioda

Tohru Hanari

Masato Nakano

Tsuyoshi Yahata

Hiroshi Shimizu

Masami Kimura

Hiroyuki Fujita

Yoshitoyo Yasuda

Yoshiyuki Ohgi

Teruaki Hayashida

Yoshiharu Higuchi

Hiromasa Chiba

Masahiko Taniguchi

Yoshitaka Morimoto

Mototake Tsutsui

Takeshi Suzuki

Hiroshi Yamazaki

Youichi Kugimiya

Taketo Hirose

Minoru Adachi

Hitoshi Kuramochi

Tetsuya Matsukawa

Masazumi Miyajima

Kiyomi Yamamoto

Nobutaka Hattori

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

Metallocene compounds represented by the following general formula (1):YKLMX&#x2003;&#x2003;(1)wherein M, Y, q, L and X are each as defined in the Specification.

Metallocene compounds, processes for the production of olefin polymers using catalysts containing the compounds, and olefin polymers produced by the processes

The present invention provides a metallocene compound which produces an olefin polymer having a high molecular weight with a high stereoregularity. The metallocene compound has the following formula (1):Q(CHR)(CHR)MXY&#x2003;&#x2003;(1)

Metallocene compound, olefin polymerization catalyst containing the compound, and method for producing an olefin polymer by use of the catalyst

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

Disclosed is a process for producing olefin polymers or copolymers which can freely regulates the molecular weight of the polymers or copolymers as well as novel olefin polymers or copolymers excellent in rigidity, heat-resisting property and transparency, moldings and compositions thereof which find a wide variety of applications in versatile industrial parts including containers, films, sheets, filaments or fibers, featured by (1) a process for producing olefin polymers or copolymers by the aid of a catalyst comprised predominantly of the compounds: (A) a transition metal compound of the formula: Q(C H R )(C H R )MXY, (B) an aluminoxane, (C) a fine particulate carrier, and (D) an organoaluminum compound; (2) olefin polymers or copolymers characterized by (a) a specific ratio of isotactic pentad, (b) 2,1- and 1.3-propylene units contents in the polymer chain, (c) a specific Mw, (d) a specific Mw/Mn, and (e) in case of elevating temperature of o-dichlorobenzene continuously or stepwise up to given temperatures to measure the amount of eluated polyolefin at each temperature, the position of a main elution peak and the amount of components existing in the range of &plusmn;10&deg; C. of the main elution peak; (3) injection moldings, films, filaments or fibers, and non-woven fabric of the polypropylene obtained; and (4) a composition comprising the polypropylene obtained and an &agr;-nucleating agent or a composition comprising the polypropylene and a radical generator and having been produced by subjecting to the mixture to melt-kneading.

Process for the preparation of olefin (co) polymers, olefin copolymers, and application thereof

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

Process for producing a solid catalyst component for olefin polymerization and a process for producing an olefin polymer

A solid catalyst component for olefin polymerization superior in shatter resistance and narrowness of particle size distribution, is provided,

Process for producing a solid catalyst component for olefin

A catalyst component for olefin polymerization composed of a solid component (IV) and capable of affording a supported type catalyst composed of large particles and having a sharp particle size distribution is provided,

Catalyst component for olefin polymerization

A catalyst for use in polymerization of olefins which comprises a carrier mainly composed of a magnesium compound precipitated from a solution and a catalytic component supported on the carrier and selected from titanium halides, vanadyl halides and vanadium halides is described. The catalyst is obtained by a process which comprises: (A) mixing (a) at least one magnesium compound with (c) a saturated or unsaturated monohydric or polyhydric alcohol for reaction in dissolved state in the presence of (b) carbon dioxide in an inert hydrocarbon solvent to obtain component (A); (B) subjecting the component (A) to mixing and reaction with (d) a titanium and/or a vanadyl halide and/or a vanadium halide of the general formula, VX.sub.r (OR.sup.8).sub.4-r, and also with (e) at least one boron compound, Si compound and/or Siloxane compound thereby obtaining solid product (I); (C) reacting the solid product (I) with (f) a cyclic ether with or without R.sup.12 OH thereby causing dissolution and re-precipitation to obtain solid product (II); and (D) subjecting the solid product (II) to further reaction with (g) component (B) consisting of a titanium halide and/or a vanadyl halide and/or a vanadium halide, and/or a SiX.sub. s (OR.sup.9).sub.4-s, thereby obtaining solid product (III), followed either by further reaction with a mixture of the component (B) and (h) an electron donor or by reaction of (g) with the solid product (III) obtained by the reaction between the solid product (II) and (h) or (h) with (j) electron donor, thereby obtaining solid product (IV) for use as the catalytic component.

Catalysts for polymerization of olefins

A solid catalyst component which can produce .alpha.-olefin polymers having a high stereoregularity and a good powder fluidity, stably and with a good efficiency in gas phase polymerization, particularly in gas phase copolymerization, a catalyst for .alpha.-olefin polymerization using the above solid catalyst component and a process for producing the above catalyst component, are provided,

Solid catalyst component for .alpha.-olefin polymerization and process

A process for producing .alpha.-olefin polymers is proposed wherein the catalyst prepared and used therein is superior in the shelf stability and heat stability. The process comprises reacting TiCl.sub.4 with a reaction product (I) of an organoaluminum compound with an electron donor to obtain a solid product (II), which is then subjected to polymerization treatment with an .alpha.-olefin, and further reacted with an electron donor and an electron acceptor to obtain a solid product (III), which is then combined with an organoaluminum compound, to obtain a catalyst, in the presence of which .alpha.-olefin(s) are polymerized. The catalyst can be further preactivated with an .alpha.-olefin in advance of its use for the polymerization.

Process for producing alpha-olefin polymers

A solid catalyst component for .alpha.-olefin polymerization which, when produced, causes any troubles due to its small particle size and when used, yields a spherical polymer of a suitably less particle size and a high bulk density with a slightest quantity of atactic polymer and affording a very good dispersibility of powdery additives therein in spite of its narrow particle size distribution, and a process for producing the same, are provided, which solid catalyst component comprises Ti and Cl as active ingredients, having an average particle diameter of 2 to 10.mu., a specific surface area of 100 m.sup.2 /g or more and a diffraction line corresponding to a distance between lattices of 4.80 to 5.10 .ANG. by way of X-ray diffraction; and which process is characterized in that when TiCl.sub.4 is reduced with a reducing agent comprising an organoaluminum compound to produce a solid intermediate, there is employed an agitation intensity defined by definite values of agitation power and baffle ratio.

Solid catalyst component for alpha-olefin polymerization and process for

A process for producing .alpha.-olefin polymers having high crystallinity and good particle form, with a high yield is provided. The polymerization therefor is carried out in the presence of a preactivated catalyst suitable particularly to gas phase polymerization or gas phase polymerization following slurry or bulk polymerization. The catalyst is prepared by reacting a reduction solid prepared by reducing TiCl.sub.4 with an organoaluminum compound, with an electron donor and an electron acceptor to obtain a solid product, and

Process for producing .alpha.-olefin polymers

A preactivated catalyst for producing .alpha.-olefin polymers is provided, which is obtained by the steps which comprises:

Growing community of inventors

Ichihara, Japan

Toshihiro Uwai