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Toshiyuki Tsutsui, Ken Yoshitsugu, Akinori Toyota: Ethylene random copolymers. Mitsui Petrochemical, Sherman and Shalloway, June 8, 1993: US05218071 (194 worldwide citation)

In accordance with the present invention, there are provided ethylene copolymers composed of structural units (a) derived from ethylene and structural units (b) derived from .alpha.-olefin of 3.about.20 carbon atoms, said ethylene copolymers having


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Mamoru Kioka, Toshiyuki Tsutsui, Akinori Toyota: Olefin polymerization catalyst component, olefin polymerization catalyst and process for the polymerization of olefins. Mitsui Petrochemical, Sherman and Shalloway, February 25, 1992: US05091352 (103 worldwide citation)

In accordance with the present invention, there are provided olefin polymerization catalyst components comprising an organoaluminum oxy-compound having less than 10% in terms of Al atom of Al component dissolving in benzene kept at 60.degree. C., and olefin polymerization catalyst containing said ol ...


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Mamoru Kioka, Norio Kashiwa, Toshiyuki Tsutsui, Akinori Toyota: Catalyst for polymerizing an olefin and process for polymerizing an olefin. Mitsui Petrochemical, Sherman & Shalloway, April 27, 1993: US05206199 (83 worldwide citation)

An olefin is polymerized or copolymerized under the presence of an olefin-polymerizing catalyst prepared from (A) a transition-metal compound or (A') a transition-metal compound loaded on a fine-particle carrier, said transition metal being selected from group IVB in the periodic table; (B) an alumi ...


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Tatsuya Tanizaki, Mikio Hashimoto, Masahiro Sugi, Toshiyuki Tsutsui, Yasuo Tanaka, Mamoru Kagami: Polypropylene composition and uses thereof. Mitsui Chemicals, December 7, 1999: US05998039 (83 worldwide citation)

Disclosed is a polypropylene composition comprising (A) polypropylene and (B) a specific propylene-1-butene random copolymer in a specific amount ratio. The propylene-1-butene random copolymer (B) is characterized in that: (1) the copolymer contains 50 to 95% by mol of constituent units from propyle ...


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Terunori Fujita, Yasushi Tohi, Makoto Mitani, Shigekazu Matsui, Junji Saito, Masatoshi Nitabaru, Kiyoaki Sugi, Haruyuki Makio, Toshiyuki Tsutsui: Olefin polymerization catalysts, transition metal compounds, processes for olefin polymerization, and &agr;-olefin/conjugated diene copolymers. Mitsui Chemicals, Birch Stewart Kolasch & Birch, October 30, 2001: US06309997 (73 worldwide citation)

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 olef ...


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Toshiyuki Tsutsui, Mamoru Kioka, Akinori Toyota: Benzene-insoluble organoaluminum oxy-compounds and process for preparing same. Mitsui Petrochemical, Sherman and Shalloway, February 5, 1991: US04990640 (70 worldwide citation)

In accordance with the present invention, there are provided benzene-insoluble organoaluminum oxy-compounds having less than 10% in terms of Al atom of Al component dissolving in benzene kept at 60.degree. C. and less than 0.09 of a (D.sub.1260 /D.sub.1220) of an absorbance (D.sub.1260) at 1260 cm.s ...


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Toshiyuki Tsutsui, Ken Yoshitsugu, Takashi Ueda: Ethylene copolymer. Mitsui Petrochemical, Sherman and Shalloway, December 20, 1994: US05374700 (57 worldwide citation)

The present invention provides an ethylene copolymer comprising constituent units (a) derived from ethylene and constituent units (b) derived from an .alpha.-olefin having 3 to 20 carbon atoms, the ethylene copolymer being characterized in that


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