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    METHOD OF POLYMERISING ALPHA-OLEFINES IN PRESENCE OF A CATALYST
    32.
    发明专利
    METHOD OF POLYMERISING ALPHA-OLEFINES IN PRESENCE OF A CATALYST 未知

    公开(公告)号：PL167905B1

    公开(公告)日：1995-12-30

    申请号：PL30067890

    申请日：1990-12-28

    Applicant: MITSUI PETROCHEMICAL IND

    Inventor： KIOKA MAMORU ,  NAKANO MASAO ,  UEDA TAKASHI

    IPC: C08F4/60 ,  C08F4/652 ,  C08F4/651 ,  C08F4/654 ,  C08F4/656 ,  C08F10/00 ,  C08F10/02 ,  C08F10/06

    Abstract: The present invention relates to solid catalyst components for olefin polymerization formed by prepolymerizing at least two types of alpha -olefin on an olefin polymerization catalyst comprising a solid titanium catalyst component, an organometallic compound catalyst component, and if necessary, an electron donor, to olefin polymerization catalyst comprising said soild catalyst component for olefin polymerization, an organometallic compound catalyst component, and if necessary, an electron donor, and to processes for olefin polymerization using said olefin polymerization catalyst. According to the present invention, there can be manufactured olefin polymer particles having low adhesive among the polymer particles as well as good particle distribution and excellent granular properties even when they contain a large amount of an amorphous olefin polymer portion.

    36.
    发明专利
    未知

    公开(公告)号：DE3585777D1

    公开(公告)日：1992-05-07

    申请号：DE3585777

    申请日：1985-11-29

    Applicant: MITSUI PETROCHEMICAL IND

    Inventor： UEDA TAKASHI ,  SAGANE TOSHIHIRO

    IPC: C08F255/00 ,  G03G9/087 ,  G03G9/08

    Abstract: A heat-flexible electrophotographic toner composition comprising… (A) a graft modified polyolefin composed of 100 parts by weight of a polyolefin having an intrinsic viscosity, measured in decalin at 135 DEG C, of from 0.04 to 1.2 dl/g, and grafted thereto a monomer selected from the group consisting of (a) 1.0 to 100 parts by weight of acrylonitrile or methacrylonitrile, (b) 3 to 200 parts by weight of an aromatic carboxylic acid vinyl ester and (c) 2 to 43 parts by weight of an unsaturated carboxylic acid ester, and… (B) a coloring agent.

    METHOD FOR THE PREPARATION OF ETHYLENE POLYMER COMPOSITIONS
    39.
    发明专利
    METHOD FOR THE PREPARATION OF ETHYLENE POLYMER COMPOSITIONS 未知

    公开(公告)号：CA2036196A1

    公开(公告)日：1991-08-14

    申请号：CA2036196

    申请日：1991-02-12

    Applicant: MITSUI PETROCHEMICAL IND

    Inventor： TSUTSUI TOSHIYUKI ,  UEDA TAKASHI

    IPC: C08F10/02 ,  C08F210/16 ,  C08F297/08 ,  C08L23/04 ,  C08L57/00

    Abstract: A method for the preparation of an ethylene polymer composition having a density of 0.87-0.93 g/cm and an intrinsic viscosity Ä eta Ü of 0.5-6 dl/g, which comprises carrying out a multi-stage process comprising a polymerization step (c): wherein ethylene and another alpha -olefin are copolymerized using an olefin polymerization catalyst ÄIIÜ, which comprises a transition metal compound ÄAÜ containing a ligand having a cycloalkadienyl skeleton and an organoaluminum oxy-compound ÄBÜ, to form an ethylene copolymer ÄIIIÜ having a density of lower than 0.91 g/cm and an intrinsic viscosity Ä eta Ü of 0.5-6 dl/g, and a polymerization step (d): wherein ethylene is homopolymerized or ethylene and another alpha -olefin are copolymerized using an olefin polymerization catalyst ÄIIIÜ, which comprises a titanium catalyst component ÄCÜ containing titanium, magnesium and halogen as its essential ingredients, an organoaluminum compound ÄDÜ and/or an organoaluminum oxy-compound ÄEÜ to form an ethylene copolymer ÄIVÜ having a density greater than that of the ethylene copolymer ÄIIIÜ and an intrinsic viscosity Ä eta Ü of 0.5-6 dl/g, wherein the polymerization steps (c) and (d) are carried out such that step (c) is carried out first and step (d) is carried out in the presence of the ethylene copolymer ÄIIIÜ or step (d) is carried out first and step (c) is carried out in the presence of the ethylene polymer ÄIVÜ so that the ethylene polymer ÄIVÜ amounts to 10-1000 parts by weight based on 100 parts by weight of the ethylene copolymer ÄIIIÜ.

    ETHYLENE COPOLYMER
    40.
    发明专利
    ETHYLENE COPOLYMER 未知

    公开(公告)号：DE3368420D1

    公开(公告)日：1987-01-29

    申请号：DE3368420

    申请日：1983-10-25

    Applicant: MITSUI PETROCHEMICAL IND

    Inventor： KOHYAMA MASAKI ,  MOTOOKA MASANORI ,  UEDA TAKASHI

    IPC: C08F210/00 ,  C08F4/64 ,  C08F10/00 ,  C08F210/16

    Abstract: A catalyst composition for the polymerization or copolymerization of olefins composed of(A) a titanium component (a-1) or (a-2),(a-1) a highly active titanium component containing titanium, magnesium and halogen as essential ingredients, or(a-2) a highly active titanium catalyst component obtained by treating component (a-1) with an organic compound containing active hydrogen bonded to oxygen, and(B) an organoaluminum compound component, characterised in that(i) when component (A) is the component (a-1), component (B) is an organoaluminum compound component obtained by treating a halogen-containing organoaluminum compound having a halogen/Al atomic ratio of at least 1/1 but less than 2/1 with a compound selected from water and organic compounds having active hydrogen bonded to oxygen, and(ii) when component (A) is the component (a-2), the component (B) is a halogen-containing organoaluminum compound having a halogen/Al atomic ratio of at least 1/1 but less than 2/1, and the ratio of the amount (x) of the organic compound having active hydrogen atom bonded to oxygen and/or oxygen-containing group derived from said organic compound to the amount (y) of titanium x:y, is 4-100:1.

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