Chisso Corporation

Other

Yoshiyuki Ohgi

Tsutomu Ushioda

Jun Saito

Mototake Tsutsui

Hiroyuki Fujita

Yoshitoyo Yasuda

Toshihiro Uwai

Masato Nakano

Minoru Adachi

Masami Kimura

Masahiko Taniguchi

Yoshitaka Morimoto

Yasuhiro Shiraishi

Hiroshi Yamazaki

Youichi Kugimiya

Shinji Nakata

Taketo Hirose

Tsuyoshi Yahata

Hitoshi Kuramochi

Kiyomi Yamamoto

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

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

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

Propylene/ethylene/&agr;-olefin terpolymers and processes for the production thereof

Polypropylene composition

Propylene copolymer and process for the production thereof

Growing community of inventors

Ichihara, Japan

Yoshiyuki Ohgi