Patents by Inventor Yoshihisa Kiso

Yoshihisa Kiso 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).

  • Patent number: 6930152
    Abstract: A propylene polymer composition is prepared by mixing propylene homo- or co-polymer (A) obtained using a transition metal catalyst compound (h), defined herein, with a co-catalyst, e.g., organoaluminum oxy compound, with an olefin elastomer (D) and another olefin polymer (E), e.g., polyethylene. Alternatively, the combination of propylene polymer (A), olefin elastomer (D) and olefin polymer (E) is prepared by a multi-stage polymerization method. In both cases, the propylene homo- or co-polymer (A) may include a second propylene homo- or co-polymer (A?) wherein the ratio of intrinsic viscosities of propylene polymers (A) and (A?) is in the range of 3 to 30. These propylene polymer compositions are excellent in heat resistance, mechanical strength, tensile elongation at break, etc., and can be used in the fabrication of structural materials, films and sheets.
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: August 16, 2005
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Mikio Hashimoto, Takasi Ueda, Masaaki Kawasaki, Satoru Moriya, Akira Mizuno, Daisuke Fukuoka, Junichi Imuta, Keiji Hirose, Junji Saito, Yoshihisa Kiso
  • Patent number: 6838522
    Abstract: A propylene polymer composition comprising a propylene polymer prepared by using a zirconocene catalyst having two aryl-substituted indenyl group and having a melt flow rate (MFR) of 0.01 to 30 g/10 min and a second propylene polymer prepared by using a zirconocene catalyst having a melt flow rate (MFR) of 30 to 1,000 g/10 min and, if desired, a soft polymer, a ratio of the MFR of the second propylene polymer to the MFR of the second propylene polymer being not less than 30. These propylene polymer compositions are excellent in heat resistance, mechanical strength, tensile elongation at break, etc., and hence they can be favorably used for various structural materials such as those of automobile and electrical appliances, daily necessaries, various films and sheets.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: January 4, 2005
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Mikio Hashimoto, Takasi Ueda, Masaaki Kawasaki, Satoru Moriya, Akira Mizuno, Daisuke Fukuoka, Junichi Imuta, Keiji Hirose, Junji Saito, Yoshihisa Kiso
  • Publication number: 20040230004
    Abstract: A propylene polymer composition is prepared by mixing propylene homo- or co-polymer (A) obtained using a transition metal catalyst compound (h), defined herein, with a co-catalyst, e.g., organoaluminum oxy compound, with an olefin elastomer (D) and another olefin polymer (E), e.g., polyethylene. Alternatively, the combination of propylene polymer (A), olefin elastomer (D) and olefin polymer (E) is prepared by a multi-stage polymerization method. In both cases, the propylene homo- or co-polymer (A) may include a second propylene homo- or co-polymer (A′) wherein the ratio of intrinsic viscosities of propylene polymers (A) and (A′) is in the range of 3 to 30. These propylene polymer compositions are excellent in heat resistance, mechanical strength, tensile elongation at break, etc., and can be used in the fabrication of structural materials, films and sheets.
    Type: Application
    Filed: December 11, 2003
    Publication date: November 18, 2004
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Mikio Hashimoto, Takasi Ueda, Masaaki Kawasaki, Satoru Moriya, Akira Mizuno, Daisuke Fukuoka, Junichi Imuta, Keiji Hirose, Junji Saito, Yoshihisa Kiso
  • Publication number: 20030130428
    Abstract: A propylene polymer composition is prepared by mixing propylene home- or co-polymer (A) obtained using a transition metal catalyst compound (h), defined herein, with a co-catalyst, e.g., organoaluminum oxy compound, with an olefin elastomer (D) and another olefin polymer (E), e.g., polyethylene. Alternatively, the combination of propylene polymer (A), olefin elastomer (D) and olefin polymer (E) is prepared by a multi-stage polymerization method. In both cases, the propylene homo- or copolymer (A) may include a second propylene homo- or co-polymer (A′) wherein the ratio of intrinsic viscosities of propylene polymers (A) and (A′) is in the range of 3 to 30. These propylene polymer compositions are excellent in heat resistance, mechanical strength, tensile elongation at break, etc., and can be used in the fabrication of structural materials, films and sheets.
    Type: Application
    Filed: September 20, 2001
    Publication date: July 10, 2003
    Inventors: Mikio Hashimoto, Takasi Ueda, Masaaki Kawasaki, Satoru Moriya, Akira Mizuno, Daisuke Fukuoka, Junichi Imuta, Keiji Hirose, Junji Saito, Yoshihisa Kiso
  • Publication number: 20020045712
    Abstract: A propylene polymer composition comprising a propylene polymer prepared by using a zirconocene catalyst having two aryl-substituted indenyl group and having a melt flow rate (MFR) of 0.01 to 30 g/10 min and a second propylene polymer prepared by using a zirconocene catalyst having a melt flow rate (MFR) of 30 to 1,000 g/l 0 min and, if desired, a soft polymer, a ratio of the MFR of the second propylene polymer to the MFR of the second propylene polymer being not less than 30. These propylene polymer compositions are excellent in heat resistance, mechanical strength, tensile elongation at break, etc., and hence they can be favorably used for various structural materials such as those of automobile and electrical appliances, daily necessaries, various films and sheets.
    Type: Application
    Filed: October 11, 2001
    Publication date: April 18, 2002
    Inventors: Mikio Hashimoto, Takasi Ueda, Masaaki Kawasaki, Satoru Moriya, Akira Mizuno, Daisuke Fukuoka, Junichi Imuta, Keiji Hirose, Junji Saito, Yoshihisa Kiso
  • Patent number: 6156844
    Abstract: A propylene polymer composition is prepared by mixing a first propylene polymer prepared using an olefin polymerization catalyst containing a specific metallocene catalyst component of formula (I), e.g., rac-dimethylsilylene-bis{1-(2-ethyl-4-phenylindenyl)} zirconium dichloride, and an organoaluminum-oxy cocatalyst, with a second propylene polymer component. The compositions are excellent in heat resistance, mechanical strength, tensile elongation at break, and other properties and can be used to produce various structural materials, sheets and films.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: December 5, 2000
    Assignee: Mitsui Chemicals Inc
    Inventors: Mikio Hashimoto, Takasi Ueda, Masaaki Kawasaki, Satoru Moriya, Akira Mizuno, Daisuke Fukuoka, Junichi Imuta, Keiji Hirose, Junji Saito, Yoshihisa Kiso
  • Patent number: 5959046
    Abstract: A process for producing a propylene polymer having an intrinsic viscosity (.eta.), as measured in decahydronaphthalene at 135.degree. C., of 1 to 12 dl/g comprises polymerizing propylene optionally with other olefins in the presence of an olefin polymerization catalyst comprising a transition metal compound represented by the formula ##STR1## wherein R.sup.1 and R.sup.2 are each a hydrogen atom or a hydrocarbon group of 1 to 3 carbon atoms,X.sup.1 and X.sup.2 are each a halogen atom, andY is a divalent silicon-containing group.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: September 28, 1999
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Junichi Imuta, Junji Saito, Takashi Ueda, Yoshihisa Kiso, Akira Mizuno, Masaaki Kawasaki
  • Patent number: 5936053
    Abstract: A propylene polymer is excellent in rigidity, heat resistance, surface hardness, glossiness, transparency and impact resistance. A propylene copolymer (wherein the amount of monomer units derived from an .alpha.-olefin other than propylene is not more than 5% by mol) is excellent in transparency, rigidity, surface hardness, heat resistance, heat-sealing property, anti-blocking property, anti-bleedout property and impact strength. A propylene copolymer (wherein the amount of monomer units derived from an .alpha.-olefin other than propylene is not less than 5% by mol) is excellent in transparency, environmental aging property, and effective in improving heat-sealing property at low temperature and impact strength. A propylene elastomer is excellent in heat resistance, impact absorbing capacity, transparency, heat-sealing properties and anti-blocking properties.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: August 10, 1999
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Daisuke Fukuoka, Takashi Tashiro, Koji Kawaai, Takashi Ueda, Yoshihisa Kiso, Akira Mizuno, Masaaki Kawasaki, Masaaki Itoh, Mikio Hashimoto
  • Patent number: 5922901
    Abstract: It is contemplated to provide an industrially adapted method for producing a dimerization product of acrylonitrile, which method is capable of producing a straight chain dimer of acrylonitrile efficiently at a high yield in a simple manner using a highly active catalyst exhibiting superior stability, without suffering from occurrence of difficulty removable by-products. In the method according to the present invention, acrylonitrile is subjected to dimerization in the presence of a ruthenium complex composed of a central atom of ruthenium and ligands including cyclopentadiene or its derivative coordinating thereto. The dimerization product, such as adiponitrile, 1,4-dicyanobutene or 1,4-dicyanobutadiene, is useful as an intermediate for producing hexamethylenediamine and adipic acid, both serving for the starting material of nylon 66, or as an intermediate for producing, for example, an antirusting agent and a vulcanization accelerator for rubbers.
    Type: Grant
    Filed: February 26, 1997
    Date of Patent: July 13, 1999
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Yasuhiko Suzuki, Yoshihisa Kiso
  • Patent number: 5859272
    Abstract: Disclosed is a novel transition metal compound represented by the following formula: ##STR1## wherein M is a transition metal, X is halogen or the like, R.sup.1 is a hydrocarbon group or the like, R.sup.2 is an aryl group substituted with a halogenated hydrocarbon group, and Y is a divalent silicon-containing group or the like.Also disclosed are an olefin polymerization catalyst component comprising the transition metal compound, an olefin polymerization catalyst comprising the olefin polymerization catalyst component, and a process for olefin polymerization using the olefin polymerization catalyst.An olefin polymerization catalyst component having high polymerization activity can be formed from the transition metal compound. By the use of the olefin polymerization catalyst or the process for olefin polymerization, polyolefins having a high melting point and a high molecular weight can be prepared with high polymerization activity.
    Type: Grant
    Filed: January 24, 1997
    Date of Patent: January 12, 1999
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Junichi Imuta, Daisuke Fukuoka, Masayasu Yoshida, Junji Saito, Terunori Fujita, Takashi Tashiro, Koji Kawaai, Takashi Ueda, Yoshihisa Kiso
  • Patent number: 5767033
    Abstract: The novel transition metal compound of the invention is represented by the following formula: ##STR1## wherein R.sup.1 and R.sup.2 are each a hydrogen atom or a hydrocarbon group of 1 to 3 carbon atoms;X.sup.1 and X.sup.2 are each a halogen atom; andY is a divalent silicon-containing group selected from the group consisting of dimethylsilylene, diphenylsilylene and methylphenylsilylene. The transition metal compound is useful for an olefin polymerization catalyst with which a propylene (co)polymer having specific structure is prepared.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: June 16, 1998
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Junichi Imuta, Junji Saito, Takashi Ueda, Yoshihisa Kiso, Akira Mizuno, Masaaki Kawasaki
  • Patent number: 5739366
    Abstract: The novel transition metal compound of the invention is represented by the following formula (I): ##STR1## wherein M is a transition metal; R.sup.1 and R.sup.2 are each a hydrogen atom, a hydrocarbon group or the like; R.sup.3 is an alkyl group of 2 to 20 carbon atoms; R.sup.4 is an alkyl group of 2 to 20 carbon atoms; X.sup.1 and X.sup.2 are each a halogen atom or the like; and Y is a divalent hydrocarbon group, a divalent silicon-containing group or the like. The transition metal compound is useful for an olefin polymerization catalyst with which a propylene (co)polymer having specific structure is prepared.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 14, 1998
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Junichi Imuta, Junji Saito, Takashi Ueda, Yoshihisa Kiso, Akira Mizuno, Masaaki Kawasaki
  • Patent number: 5723640
    Abstract: The novel transition metal compound of the invention is represented by the following formula (I): ##STR1## wherein M is a transition metal; R.sup.1 is a hydrocarbon group of 2 to 6 carbon atoms, R.sup.2 is an aryl group of 6 to 16 carbon atoms; X.sup.1 and X.sup.2 are each a halogen atom or the like; and Y is a divalent hydrocarbon group, a divalent silicon-containing group or the like. An olefin polymerization catalyst component of the present invention comprises the aforementioned transition metal compound.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: March 3, 1998
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Daisuke Fukuoka, Takashi Tashiro, Koji Kawaai, Junji Saito, Takashi Ueda, Yoshihisa Kiso, Junichi Imuta, Terunori Fujita, Masatoshi Nitabaru, Masayasu Yoshida
  • Patent number: 5710223
    Abstract: A process for polymerizing propylene utilizes a metallocene catalyst component of the formula (I) ##STR1## wherein M is a transition metal, R.sup.1 is a C.sub.2-6 hydrocarbon, R.sup.2 is a C.sub.6-16 aryl group, X.sup.1 and X.sup.2 are each a halogen atom and Y is a divalent hydrocarbon or a divalent silicon-containing group. Propylene polymers produced thereby have such properties that the triad tacticity of propylene units is high, the proportion of inversely inserted units based on the 2,1-insertion of propylene monomer is in a specific range and the intrinsic viscosity (.eta.), as measured in decahydronaphthalene at 135.degree. C., is in a specific range.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: January 20, 1998
    Assignee: Mitsui Petrochemical Industries Ltd.
    Inventors: Daisuke Fukuoka, Takashi Tashiro, Koji Kawaai, Junji Saito, Takashi Ueda, Yoshihisa Kiso, Junichi Imuta, Terunori Fujita, Masatoshi Nitabaru, Masayasu Yoshida
  • Patent number: 5705584
    Abstract: The novel propylene homopolymer and copolymer produced by using a catalyst which is represented by the following formula (I): ##STR1## wherein M is a transition metal; R.sup.1 is a hydrocarbon group of 2 to 6 carbon atoms, R.sup.2 is an aryl group of 6 to 16 carbon atoms; X.sup.1 and X.sup.2 are each a halogen atom or the like; and Y is a divalent hydrocarbon group, a divalent silicon-containing group or the like.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 6, 1998
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Daisuke Fukuoka, Takashi Tashiro, Koji Kawaai, Takashi Ueda, Yoshihisa Kiso, Akira Mizuno, Masaaki Kawasaki, Masaaki Itoh, Mikio Hashimoto
  • Patent number: 5677408
    Abstract: The novel propylene elastomer according to the invention contains (1) units derived from propylene in amounts of 50 to 95% by mol and units derived from 1-butene in amounts of 5 to 50% by mol, and has (2) triad tacticity (mm fraction), determined by the .sup.13 C-NMR spectrum (hexachlorobutadiene solution, based on tetramethylsilane), of not less than 90%, (3) an intrinsic viscosity (in decalin at 135.degree. C.) of 0.1 to 12 dl/g, (4) a molecular weight distribution (Mw/Mn) of not more than 3 and (5) a randomness parameter B value of 1.0 to 1.5, preferably 1.0 to 1.3. In addition, the elastomer desirably has properties that (6) the elastomer has a melting point Tm of 60.degree. to 140.degree. C., and the melting point Tm and a 1-butene constituent unit content M (% by mol) in the elastomer satisfy the relation -2.6M+130.ltoreq.Tm.ltoreq.-2.3M+155, and (7) a crystallinity C of the elastomer measured by X-ray diffractometry and the 1-butene constituent unit content M (% by mol) satisfy the relation C.ltoreq.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: October 14, 1997
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Takashi Ueda, Akira Mizuno, Masaaki Kawasaki, Daisuke Fukuoka, Yoshihisa Kiso, Tatsuya Tanizaki, Mikio Hashimoto, Masahiro Sugi, Toshiyuki Tsutsui
  • Patent number: 5658997
    Abstract: The novel transition metal compound of the invention is represented by the following formula (I): ##STR1## wherein M is a transition metal; R.sup.1 is a hydrocarbon group of 2 to 6 carbon atoms, R.sup.2 is an aryl group of 6 to 16 carbon atoms; X.sup.1 and X.sup.2 are each a halogen atom or the like; and Y is a divalent hydrocarbon group, a divalent silicon-containing group or the like. An olefin polymerization catalyst component of the present invention comprises the aforementioned transition metal compound. An olefin polymerization catalyst of the present invention comprises the aforementioned olefin polymerization catalyst component. The propylene homopolymer, the propylene copolymer and the propylene elastomer according to the present invention have such properties that the triad tacticity of propylene units chain is high, a proportion of the inversely units based on the 2,1-insertion of propylene monomer is in the specific range, and the intrinsic viscosity [.eta.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 19, 1997
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Daisuke Fukuoka, Takashi Tashiro, Koji Kawaai, Junji Saito, Takashi Ueda, Yoshihisa Kiso, Junichi Imuta, Terunori Fujita, Masatoshi Nitabaru, Masayasu Yoshida
  • Patent number: 5629254
    Abstract: The novel transition metal catalyst of the invention is represented by the following formula (I): ##STR1## wherein M is a zirconium or hafnium; R.sup.1 is a hydrocarbon group of 2 to 6 carbon atoms, R.sup.2 is an aryl group of 6 to 16 carbon atoms; X.sup.1 and X.sup.2 are each a halogen atom; and Y is a divalent hydrocarbon group, a divalent silicon-containing group.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 13, 1997
    Assignee: Mitsui Petrochemical Industries Co., Ltd.
    Inventors: Daisuke Fukuoka, Takashi Tashiro, Koji Kawaai, Junji Saito, Takashi Ueda, Yoshihisa Kiso, Junichi Imuta, Terunori Fujita, Masatoshi Nitabaru, Masayasu Yoshida
  • Patent number: 5616663
    Abstract: Disclosed is a novel transition metal compound represented by the following formula: ##STR1## wherein M is a transition metal, X is halogen or the like, R.sup.1 is a hydrocarbon group or the like, R.sup.2 is an aryl group substituted with a halogenated hydrocarbon group, and Y is a divalent silicon-containing group or the like.Also disclosed are an olefin polymerization catalyst component comprising the transition metal compound, an olefin polymerization catalyst comprising the olefin polymerization catalyst component, and a process for olefin polymerization using the olefin polymerization catalyst.An olefin polymerization catalyst component having high polymerization activity can be formed from the transition metal compound. By the use of the olefin polymerization catalyst or the process for olefin polymerization, polyolefins having a high melting point and a high molecular weight can be prepared with high polymerization activity.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: April 1, 1997
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Junichi Imuta, Daisuke Fukuoka, Masayasu Yoshida, Junji Saito, Terunori Fujita, Takashi Tashiro, Koji Kawaai, Takashi Ueda, Yoshihisa Kiso
  • Patent number: RE36293
    Abstract: The present invention provides lubricant oil compositions comprising a polyalkylene glycol carbonate. The lubricant oil compositions are useful for industrial gear oil, automotive gear oil, and lubricant oil for refrigerators, rolling installations and fibers, which are excellent in lubricating properties and detergency. The present invention also relates to lubricant oil compositions which comprise a polyalkylene glycol polycarbonate having mutual solubility with an ozone layer-nondestructive Freon such as Freon R-134a, and which are accordingly especially suited for refrigerators using hydrogenated fluorocarbon as a refrigerant. A polyalkylene glycol carbonate according to the invention comprises a polyoxypropylene group in the molecular chain and an alkyl group and an alkyloxyalkylene group at the molecular terminals.
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: September 7, 1999
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Kinya Mizui, Yoshihisa Kiso, Tetsuo Hayashi, Masahide Tanaka