Tosoh Corporation

Satoshi Hamura

Morihiko Sato

Toru Yoshida

Masao Tanabiki

Satoru Yamada

Makoto Watanabe

Takashi Okada

Shigehiko Abe

Hisami Yasuda

Kei Inatomi

Yasutake Wakabayashi

Ryuji Ikeda

An object of the present invention relates to provide an ethylene polymer having excellent mechanical strength and excellent molding processability in a wide molding processing temperature range. The invention relates to use an ethylene polymer comprising a repeating unit derived from ethylene, or a repeating unit derived from ethylene and a repeating unit derived from a C&#x3b1;-olefin, the ethylene polymer being satisfied with the following (A) to (F). (A) Density (d (kg/m)) is from 910 to 970, (B) MFR (g/10 min)) is from 0.01 to 50, (C) terminal vinyl number is 0.2 or less per 1,000 carbon atoms, (D) melt strength (MS(mN)) measured at 160&#xb0; C. and MFR are satisfied with MS&#x3e;90&#x2212;130&#xd7;log(MFR), (E) melt strength (MS(mN)) measured at 190&#xb0; C. and MSare satisfied with MS/MS&#x3c;1.8, and (F) fluidized activation energy (E(kJ/mol)) and d are satisfied with 127&#x2212;0.107d&#x3c;E&#x3c;88&#x2212;0.060d.

Ethylene polymer, catalyst for ethylene polymer production, and method for producing ethylene polymer

A transition metal compound having a ligand with an azaferrocene structure or a ferrocene structure. The transition metal compound is used in combination with an activating cocatalyst, as a catalyst for polymerization of olefins.

Transition metal compound, coordinative compound, catalyst for polymerization of olefin, and process for polymerization of olefin using the catalyst

A catalyst for polymerization of an olefin, which comprises (a) a transition metal compound of the following formula (1), (2) and/or (3): ##STR1## wherein each of M.sup.1, M.sup.2 and M.sup.3 is a titanium atom, a zirconium atom or a hafnium atom, each of Cp.sup.1, Cp.sup.2, Cp.sup.3, Cp.sup.4 and Cp.sup.5 is a cyclopentadienyl group, an indenyl group, a fluorenyl group or a substitution product thereof, R.sup.1 is a hydrogen atom, a C.sub.1-20 hydrocarbon group or a C.sub.1-20 alkylsilyl group, each of X.sup.1, X.sup.2, X.sup.3, X.sup.4, X.sup.5 and X.sup.6 is a hydrogen atom or a C.sub.1-20 hydrocarbon group, Z.sup.1 is a C.sub.1-20 hydrocarbon group, a silicon-containing C.sub.1-20 hydrocarbon group or a C.sub.1-20 alkylsilanediyl group, which serves to connect Cp.sup.3 and Cp.sup.4, Z.sup.2 is a C.sub.1-20 hydrocarbon group, a silicon-containing C.sub.1-20 hydrocarbon group or a C.sub.1-20 alkylsilanediyl group, which serves to connect Cp.sup.5 and J, J is an element of Group 15 or 16 of the Periodic Table, a is a coordination number of J, L is a Lewis base, and b is the number of the Lewis base L, provided 0.ltoreq.b.ltoreq.3, and (b) a modified clay obtained by treating clay or clay mineral with a compound containing an element of Group 15 or 16 of the Periodic Table.

Catalyst for polymerization of an olefin, and method for producing an

A novel organic transition metal compound is disclosed, which is represented by the following formula (1): ##STR1## wherein the all symbols are defined in the disclosure. A polymerization catalyst comprising the organic transition metal compound and a process for the preparation of a polyolefin using the polymerization catalyst are also disclosed.

Organic transition metal compound and process for the preparation of

A novel class of olefin polymerization catalyst system based on specific organo-transition metal compounds and which are effective for controlling in particular the width and mode of the molecular weight distribution of the resulting polyolefins, and processes of olefin polymerization using the novel catalyst systems are disclosed.

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Yokkaichi, Japan

Satoshi Hamura