Patents by Inventor Heizo Sasaki

Heizo Sasaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Catalyst for polymerizing .alpha.-olefins
    Patent number: 4282114
    Abstract: Disclosed is a catalyst for polymerizing .alpha.-olefins which comprises(A) a composition obtained by co-comminuting(a) a magnesium halide,(b) an organic acid ester,(c) a halogenated aliphatic or alicyclic hydrocarbon,(d) at least one ingredient selected from the group consisting of aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbons, halogenated aromatic hydrocarbons, liquid propylene oligomers and aromatic ethers, and(e) an aluminum halide optionally added thereto and then heat-treating the resulting mixture together with titanium tetrachloride;(B) an organic aluminum compound; and(C) an organic acid ester or a complex thereof with an aluminum halide.
    Type: Grant
    Filed: January 28, 1980
    Date of Patent: August 4, 1981
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Akira Ito, Heizo Sasaki, Masanori Osawa, Masahiro Kouno, Kenji Iwata
  • Process for the polymerization of ethylene or alpha-olefins and catalyst therefor
    Patent number: 4187385
    Abstract: Polymerization of ethylene or .alpha.-olefins using a catalyst comprising a titanium component obtained by copulverizing the starting titanium component of Ziegler catalysts and organoaluminum compound with a small amount of ethylene or .alpha.-olefins, and an organoaluminum component. The titanium catalyst component can be modified by subjecting the copulverized titanium component to a contact with an inert organic solvent or its mixture with a modifier (1) an oxygen-, sulphur-, phosphor-, nitrogen- or silicon- containing organic compound, (2) a combination of such an organic compound and an aluminum halide, (3) an organoaluminum compound or (4) a Lewis acid.
    Type: Grant
    Filed: May 16, 1977
    Date of Patent: February 5, 1980
    Assignee: Mitsui Toatsu Chemical, Inc.
    Inventors: Tetsuya Iwao, Heizo Sasaki, Akira Ito, Masahiro Kono
  • Catalyst for polymerizing .alpha.-olefins
    Patent number: 4175171
    Abstract: A catalyst for polymerizing .alpha.-olefins composed of a titanium composition formed by heating a co-comminuted mixture of a magnesium halide and a complex of an aluminum halide and a carboxylic acid ester of the formula R.sup.1 COOR.sup.2, with titanium tetra-chloride; and an organic aluminum compound of the formula AlR.sup.3 mH.sup.3 --m; and optionally added thereto at least one component selected from an alkyl aluminum halide of the formula AlR.sup.4 nX.sub.3 --n; a carboxylic acid ester of the formula R.sup.5 COOR.sup.6 ; and its complex formed with an aluminum halide; is disclosed.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: November 20, 1979
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Akira Ito, Heizo Sasaki, Masanori Osawa, Tetsuya Iwao, Kenji Iwata
  • Process for the polymerization of ethylene or .alpha.-olefins and catalyst therefor
    Patent number: 4158088
    Abstract: Polymerization of ethylene or .alpha.-olefins is carried out with use of a catalyst comprising a modified titanium component obtained by pulverizing the starting titanium component of Ziegler solid catalysts and subjecting the resultant to a modification treatment through contact with an inert organic solvent or a mixture thereof with a modifier, and an organoaluminum component.The pulverized product of the starting titanium component is pulverized together with an organoaluminum compound and a small amount of ethylene or .alpha.-olefins thereby controlling the particle size distribution.
    Type: Grant
    Filed: July 15, 1977
    Date of Patent: June 12, 1979
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tetsuya Iwao, Masahiro Kono, Heizo Sasaki, Akira Ito