Mitsui Chemicals, Inc.

Mitsui Petrochemical Industries, Ltd.

Shigekazu Matsui

Terunori Fujita

Makoto Mitani

Junji Saito

Yasunori Yoshida

Masatoshi Nitabaru

Yasushi Tohi

Tomoaki Matsugi

Takashi Nakano

Haruyuki Makio

Yasuhiko Suzuki

Toshihiro Takai

Kazutaka Tsuru

Nobuya Hirokane

Yukihiro Takagi

Hiroshi Kuroda

Toshiyuki Tsutsui

Norio Kashiwa

Shinichi Kojoh

Kiyoaki Sugi

Hidetsugu Tanaka

Masayasu Ishibashi

Naoto Matsukawa

Seiichi Ishii

Hiroshi Iwasaki

Junichi Mohri

Yoshihisa Inoue

Akifumi Kagayama

Hideto Matsuoka

Makoto Kamimura

Koji Kato

Keiji Okada

Shigenobu Ikenaga

Yoshiho Sonobe

Koji Kawaai

Yasushi Nakayama

Hiroaki Tan

Hideyuki Kaneko

Masahiro Enna

Akihiro Matsuda

Yoshiki Shimokawatoko

Toyotaro Maruyama

Chiho Hirano

Tsuneaki Koike

Hideki Bandoh

Makato Mitani

Olefin polymer with narrow molecular weight distribution and specific molecular weight, olefin polymer having functional group introduced at terminal, tapered polymer containing segment wherein monomer composition continuously changes in the polymer chain, olefin polymer having different segments bonded to each other, and process for preparing these polymers. The olefin polymers are polymers of Ccarbon atom olefins and have a number-average molecular weight of &#x2267;500 and Mw/Mn of &#x2266;1.5. In syntheses, an olefin of 2-20 carbon atoms is polymerized in the presence of a catalyst comprising a transition metal compound represented by the formula LMXwherein M is a transition metal atom of Group 3-11, m is 1-5, n is a number satisfying a valence of M, L is a ligand&#x2014;coordinated to the central metal M&#x2014;which contains a heteroatom having no direct bond to the central metal, and X is e.g. halogen or a hydrocarbon.

Olefin polymer and process for preparing the same

The present invention is a polyolefin polymer containing vinyl groups at both ends thereof, and a composition and a molded product containing the polymer, wherein the polymer contains a constitutional unit derived from at least one selected from the group consisting of ethylene (a), an &#x3b1;-olefin (b) having 3 to 20 carbon atoms, and a cyclic olefin (c), and The polymer of the present invention may be molded by a LIM molding, an injection molding, a transfer molding, a compression molding, and the like, and is excellent in acid resistance, gas permeation resistance, hydrolysis resistance, and dynamic fatigue resistance. From the polymer, a thermoplastic resin composition and a crosslinkable resin composition, and a crosslinked composition having excellent mechanical characteristics are obtained.

Polyolefin polymer containing vinyl groups at both ends and composition thereof

The present invention provides an olefin polymer having a narrow molecular weight distribution and a specific molecular weight, an olefin polymer having a functional group introduced at the terminal, a tapered polymer containing a segment wherein monomer composition continuously changes in the polymer chain, an olefin polymer having different segments which are bonded to each other, and a process for preparing these polymers. The olefin polymers of the invention are polymers of olefins of 2 to 20 carbon atoms and have a number-average molecular weight of not less than 500 and Mw/Mn of not more than 1.5. In the process for preparing an olefin polymer, an olefin of 2 to 20 carbon atoms is polymerized in the presence of an olefin polymerization catalyst comprising a transition metal compound represented by, for example, the following formula (I):LMX&#x2003;&#x2003;(I)wherein M is a transition metal atom of Group 3 to Group 11 of the periodic table, m is 1 to 5, n is a number satisfying a valence of M, L is a ligand coordinated to the central metal M and is a ligand containing a heteroatom having no direct bond to the central metal, and X is a halogen atom, a hydrocarbon group or the like.

A process for producing a polar olefin copolymer comprises copolymerizing a non-polar olefin and a polar olefin in the presence of a transition metal compound selected from Groups 4, 5, 6 and 11 of the periodic table, which is represented by the following formula (IV): wherein M' is a transition metal atom selected from Groups 4, 5, 6 and 11 of the periodic table, m is an integer of 1 to 6, A is &#x2014;O&#x2014;, &#x2014;Si&#x2014;, &#x2014;Se&#x2014;, &#x2014;N(R)&#x2014;, n is a number satisfying a valence of M&#x2032;, Rto Rand Rare each a hydrogen atom, a halogen atom, a hydrocarbon group and the like, and X is a halogen atom, an oxygen atom, a hydrocarbon group and the like, and at least one compound (B) selected from the group consisting of an organometallic compound (B-1), an organoaluminum oxy-compound (B-2) and an ionic ionizing compound (B-3). Therefore, the process is capable of obtaining a polar olefin copolymer having excellent properties under mild polymerization conditions.

Process for producing polar olefin copolymer and polar olefin copolymer obtained thereby

The invention provides a process using olefin polymerization catalysts exhibiting excellent polymerization activities. The olefin polymerization catalysts of the invention contain a transition metal compound typified by formula (I) and at least one of an organometallic compound, an organoaluminum oxy-compound or a compound which reacts with said transition metal compound to form an ion pair. The process using the inventive catalysts is useful in producing &#x3b1;-olefin/conjugated diene copolymers having specific properties 

Olefin polymerization catalysts, transition metal compounds, processes for olefin polymerization, and &#x3b1;-olefin/conjugated diene copolymers

A process for polymerizing an olefin is capable of polymerizing an olefin with excellent polymerization activity, and comprises polymerizing or copolymerizing an olefin at a polymerization reaction temperature of 50 to 200&#xb0; C. in the presence of a catalyst comprising a transition metal compound (A) represented by the following formula (I), a compound (B-1) having a reduction ability which reacts with the transition metal compound (A) to convert an imine structure moiety to a metal amide structure, and a compound (B-2) which reacts with the transition metal compound (A) to form an ion pair;wherein M is a transition metal atom of Groups 3 to 11 of the periodic table; m is an integer of 1 to 6; Y is O, S, Se, or &#x2014;C(R)&#x2014;; Rto Rmay be the same or different, and are each a hydrogen atom, a halogen atom, a hydrocarbon group, an oxgen-containing group, a nitrogen-containing group and the like; n is a number satisfying a valence of M; and X is a hydrogen atom, a halogen atom, a hydrocarbon group and the like.

Process for the polymerization olefins

A novel olefin polymerization catalyst is provided which comprises (A) a transition metal compound or lanthanoid compound containing two or more atoms selected from the group consisting of boron, nitrogen, oxygen, phosphorus, sulfur, and selenium; and (B) a Lewis acid. A process for producing an olefin polymer is also provided. The catalyst has a high olefin polymerization activity without a combined use of an expensive organoaluminum oxy-compound or organoboron compound, and can maintain the high activity for a long polymerization time.

Olefin polymerization catalyst and process for producing olefin polymer with the catalyst

The invention provides olefin polymerization catalysts exhibiting excellent polymerization activities, a process for olefin polymerization using the catalysts, a novel transition metal compound useful for the catalysts, and &#x3b1;-olefin/conjugated diene copolymers having specific properties. The olefin polymerization catalysts of the invention contain (A) a transition metal compound of formula (I), and (B) an organometallic compound, an organoaluminum oxy-compound or an ionizing ionic compound. The novel transition metal compounds of the invention are compounds of formula (I) wherein M is a transition metal atom of Group 3 or 4 of the periodic table; Ris a hydrocarbon group, etc.; Rto Rare each H, a halogen, a hydrocarbon group, etc.; Ris a halogen, a hydrocarbon group, etc.; n is a number satisfying a valence of M; and X is a halogen, a hydrocarbon group, etc

Olefin polymer and production processes thereof

The invention provides olefin polymerization catalyst exhibiting excellent polymerization activities, a process for olefin polymerization using the catalyst, a novel transition metal compound useful for the catalyst, and an &agr;-olefin/conjugated diene copolymer having specific properties. The olefin polymerization catalyst of the invention comprises (A) a transition metal compound of formula (I) or (II), and (B) an organometallic compound, an oranoaluminum oxy-compound or an ionizing ionic compound. The novel transition metal compound of the invention is a compound of formula (I) wherein M is a transition meal atom of Group 3 or 4 of the periodic table; m is an integer of 1 to 3; R is a hydrocarbon group, etc.; R to R are each H, a halogen, a hydrocarbon group, etc.; R is a halogen, a hydrocarbon group, etc.; n is a number satisfying a valence of M; and X is a halogen, a hydrocarbon group, etc.

&agr;-olefin/conjugated diene copolymers

Olefin polymerization catalyst and polymerization process

Process for preparation of hydroperoxides

Olefin polymerization catalyst and process for olefin polymerization

The present invention is intended to provide an olefin polymerization catalyst comprising a novel transition metal compound and having an excellent olefin polymerization activity and to provide a process for olefin polymerization.

Catalyst for olefin polymerization and method of polymerizing olefin

Growing community of inventors

Sodegaura, Japan

Shigekazu Matsui