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Hashimoto Mikio Mitsui Petroch, Ueda Takasi, Kawasaki Masaaki, Moriya Satoru, Mizuno Akira, Fukuoka Daisuke, Imuta Junichi, Hirose Keiji, Saito Junji Mitsui Petrochemic, Kiso Yoshihisa: Propylene polymer composition.. Mitsui Petrochemical, April 5, 1995: EP0646624-A1 (74 worldwide citation)

A propylene polymer composition composed of a propylene polymer (A1) produced by using a metallocene catalyst and having a melt flow rate (MFR) of 0.01-30 g/10 min, a propylene polymer (A2) having an MFR of 30-1,000 g/10 min and, if necessary, a flexible polymer, wherein the ratio of the MFR of the ...


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Imuta Junichi C O Mitsui Petro, Saito Junji C O Mitsui Petroch, Ueda Takashi C O Mitsui Petroc, Kiso Yoshihisa C O Mitsui Petr, Mizuno Akira C O Mitsui Petroc, Kawasaki Masaaki C O Mitsui Pe, Hashimoto Mikio C O Mitsui Pet: Novel transition metal compound, and polymerization catalyst containing it.. Mitsui Petrochemical, December 21, 1994: EP0629631-A2 (67 worldwide citation)

A transition metal compound of formula (I): wherein M is a transition metal of Group IVa, Group Va and Group VIa of the periodic table; R and R, which may all be identical or different from each other, are each a hydrogen atom, a halogen atom, a hydrocarbon group of 1 to 20 carbon atoms, a halogenat ...


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Imuta Junichi, Saito Junji, Sugimura Kenji, Fujita Terunori: Olefin polymerization catalyst and process for the production of olefin polymers. Mitsui Chemicals, January 27, 1999: EP0893454-A1 (52 worldwide citation)

The present invention provides olefin polymerization catalysts which can produce olefin polymers with excellent polymerization activity and an olefin polymerization method using the catalyst, wherein the catalyst comprises a transition metal amide compound represented by general formula (I) below: w ...


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Imuta Junichi, Matsumoto Tetsuhiro: Olefin polymerization catalyst and process for olefin polymerization. Mitsui Petrochemical, April 3, 1996: EP0704461-A2 (41 worldwide citation)

Disclosed is an olefin polymerization catalyst obtained by prepolymerizing an olefin in the presence of a solid catalyst component and an organoaluminum compound and/or Lewis acid or an ionic compound containing a boron atom, said solid catalyst component being obtained by allowing a fine particle c ...


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Ueda Takashi, Hashimoto Mikio, Kawasaki Masaaki, Fukuoka Daisuke, Imuta Junichi: Process for producing propylene polymer composition, and propylene polymer composition. Mitsui Petrochemical, April 3, 1996: EP0704463-A1 (38 worldwide citation)

A process for preparing a propylene polymer composition comprising conducting multistage polymerization including a step (a) for preparing a propylene (co)polymer (a), a step (b) for preparing a propylene-olefin copolymer (b) and a step (c) for preparing an ethylene-olefin copolymer (c) in the prese ...


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Ueda Takashi, Hashimoto Mikio, Kawasaki Masaaki, Fukuoka Daisuke, Imuta Junichi: Process for preparing propylene polymer composition and propylene polymer composition. Mitsui Petrochemical, January 7, 1998: EP0816395-A2 (33 worldwide citation)

A process for preparing a propylene polymer composition comprising conducting multistage polymerization including a step (a) for preparing a propylene (co)polymer (a), a step (b) for preparing a propylene-olefin copolymer (b) and a step (c) for preparing an ethylene-olefin copolymer (c) in the prese ...


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Imuta Junichi, Yoshida Masayasu, Tohi Yasushi: An olefin polymerization catalyst and a process for preparing olefin polymer. Mitsui Petrochemical, January 22, 1997: EP0754698-A2 (17 worldwide citation)

An olefin polymerization catalyst comprising: (A-1) a Group IVB transition metal compound of formula (I), and (B) (B-1) an organoaluminum oxy-compound, and/or (B-2) a compound which reacts with the transition metal compound (A-1) to form an ion pair, wherein, inter alia, at least one R is aryl, aryl ...


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Ohmatsuzawa Takeshi, Ehara Fujito, Hori Hideshi, Toyota Kazuo, Fukutani Kenzaburou, Imuta Junichi, Shimizu Akiyoshi, Onogi Takayuki, Noda Seiji, Sakai Masayuki, Hiraoka Shoji, Nakamachi Koji, Tsugawa Michio, Miyazoe Satoru: Catalyst for polyester production, process for producing polyester using the catalyst, polyester obtained by the process, and uses of the polyester. Mitsui Chemicals, June 28, 2000: EP1013692-A2 (15 worldwide citation)

The present invention provides a catalyst for polyester production capable of producing a polyester with high catalytic activity and a process for producing a polyester using the catalyst. The catalyst for polyester production comprises a solid titanium compound which is obtained by dehydro-drying a ...