Patents by Inventor Keiichi Taki
Keiichi Taki 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).
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Patent number: 10053562Abstract: Provided is a resin composition which contains (A) a polyethylene wax satisfying the requirements (i)-(iv) described below and (B) at least one resin selected from the group consisting of thermoplastic resins and thermosetting resins, wherein the mass ratio of (A) to (B) is from 0.1/99.9 to 50/50. This resin composition is useful for providing a toner which can be fixed by means of a relatively-low-temperature heating body and has good offset resistance, and which is suppressed in increase of particle diameters even if the toner is stored for a long period of time. (i) The weight average molecular weight (Mw) is within the range from 400 to 1,500. (ii) The molecular weight distribution (Mw/Mn) is within the range from 1.2 to 2.5. (iii) The penetration as measured at 25° C. is 5 dmm or less. (iv) The melting point (Tm) is within the range from 50° C. to 110° C.Type: GrantFiled: April 17, 2015Date of Patent: August 21, 2018Assignee: MITSUI CHEMICALS, INC.Inventors: Masakazu Tanaka, Kuniaki Kawabe, Hirotaka Kanaya, Keiichi Taki, Yuichi Kaida
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Patent number: 9944779Abstract: Provided is a resin composition containing: (A) an ethylene/?-olefin copolymer containing 91.0-99.9 parts by mole of (a) an ethylene-derived unit and 0.1-9.0 parts by mole of (b) a C3-C8 ?-olefin-derived unit (wherein (a)+(b) is 100 parts by mole), while satisfying the requirements (i)-(iv) and (B) a thermoplastic resin and/or a thermosetting resin, wherein the mass ratio (A)/(B) is 0.1/99.9 to 50/50. This resin composition is useful for providing a toner which can be fixed by a relatively-low-temperature heating body and has good offset resistance, and which is suppressed in increase of particle diameters even if the toner is stored for a long time. (i) The Mw is 400 to 1,500. (ii) The Mw/Mn is 1.2 to 2.5. (iii) The penetration measured at 25° C. is 13 dmm or less. (iv) The melting temperature is 50° C. to 110° C.Type: GrantFiled: April 17, 2015Date of Patent: April 17, 2018Assignee: MITSUI CHEMICALS, INC.Inventors: Masakazu Tanaka, Kuniaki Kawabe, Hirotaka Kanaya, Keiichi Taki, Yuichi Kaida
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Publication number: 20170037229Abstract: Provided is a resin composition containing: (A) an ethylene/?-olefin copolymer containing 91.0-99.9 parts by mole of (a) an ethylene-derived unit and 0.1-9.0 parts by mole of (b) a C3-C8 ?-olefin-derived unit (wherein (a)+(b) is 100 parts by mole), while satisfying the requirements (i)-(iv) and (B) a thermoplastic resin and/or a thermosetting resin, wherein the mass ratio (A)/(B) is 0.1/99.9 to 50/50. This resin composition is useful for providing a toner which can be fixed by a relatively-low-temperature heating body and has good offset resistance, and which is suppressed in increase of particle diameters even if the toner is stored for a long time. (i) The Mw is 400 to 1,500. (ii) The Mw/Mn is 1.2 to 2.5. (iii) The penetration measured at 25° C. is 13 dmm or less. (iv) The melting temperature is 50° C. to 110° C.Type: ApplicationFiled: April 17, 2015Publication date: February 9, 2017Applicant: MITSUI CHEMICALS, INC.Inventors: Masakazu TANAKA, Kuniaki KAWABE, Hirotaka KANAYA, Keiichi TAKI, Yuichi KAIDA
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Publication number: 20170037227Abstract: Provided is a resin composition which contains (A) a polyethylene wax satisfying the requirements (i)-(iv) described below and (B) at least one resin selected from the group consisting of thermoplastic resins and thermosetting resins, wherein the mass ratio of (A) to (B) is from 0.1/99.9 to 50/50. This resin composition is useful for providing a toner which can be fixed by means of a relatively-low-temperature heating body and has good offset resistance, and which is suppressed in increase of particle diameters even if the toner is stored for a long period of time. (i) The weight average molecular weight (Mw) is within the range from 400 to 1,500. (ii) The molecular weight distribution (Mw/Mn) is within the range from 1.2 to 2.5. (iii) The penetration as measured at 25° C. is 5 dmm or less. (iv) The melting point (Tm) is within the range from 50° C. to 110° C.Type: ApplicationFiled: April 17, 2015Publication date: February 9, 2017Applicant: MITSUI CHEMICALS, INC.Inventors: Masakazu TANAKA, Kuniaki KAWABE, Hirotaka KANAYA, Keiichi TAKI, Yuichi KAIDA
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Patent number: 9323166Abstract: The present invention addresses the problem of providing an electrophotographic toner which has excellent storage property, is excellent in offset resistance and low-temperature fixing property during printing and has few substances causing staining with time, odor or dust inside a copy machine or a printer. The present invention relates to an electrophotographic toner characterized by containing an ethylene copolymer which comprises a constituent unit (a) derived from ethylene in an amount of 80 to 99.5% by mol and a constituent unit (b) derived from a cyclic olefin of 8 or more carbon atoms in an amount of 0.5 to 20% by mol [(a)+(b)=100% by mol] and satisfies the requirements: (i) the intrinsic viscosity [?] is in the range of 0.01 to 0.50 dl/g, and (ii) the crystallinity is in the range of 50 to 90%.Type: GrantFiled: March 22, 2013Date of Patent: April 26, 2016Assignee: MITSUI CHEMICALS, INC.Inventors: Kuniaki Kawabe, Masakazu Tanaka, Hiroshi Matsuoka, Noriko Kai, Keiichi Taki
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Publication number: 20150044603Abstract: The present invention addresses the problem of providing an electrophotographic toner which has excellent storage property, is excellent in offset resistance and low-temperature fixing property during printing and has few substances causing staining with time, odor or dust inside a copy machine or a printer. The present invention relates to an electrophotographic toner characterized by containing an ethylene copolymer which comprises a constituent unit (a) derived from ethylene in an amount of 80 to 99.5% by mol and a constituent unit (b) derived from a cyclic olefin of 8 or more carbon atoms in an amount of 0.5 to 20% by mol [(a)+(b)=100% by mol] and satisfies the requirements: (i) the intrinsic viscosity [?] is in the range of 0.01 to 0.50 dl/g, and (ii) the crystallinity is in the range of 50 to 90%.Type: ApplicationFiled: March 22, 2013Publication date: February 12, 2015Applicant: Mitsui Chemicals, Inc.Inventors: Kuniaki Kawabe, Masakazu Tanaka, Hiroshi Matsuoka, Noriko Kai, Keiichi Taki
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Patent number: 8298987Abstract: A heat-sensitive recording material includes a heat-sensitive recording layer on a support which layer produces a color upon heating, and a protective layer on the heat-sensitive recording layer. The protective layer is obtained from a composition (A) based on an emulsion of a copolymer resin (a). The copolymer resin (a) includes a vinyl monomer component having a carboxyl group, and a vinyl monomer component copolymerizable with the vinyl monomer component. The copolymer resin (a) contains 1 to 10 parts by weight of the vinyl monomer component having a carboxyl group. The copolymer resin has a SP value (solubility parameter) of not less than 9.5 (cal/cm3)1/2 and a glass transition temperature (Tg) of 20 to 130° C. The emulsion of the copolymer resin (a) has a minimum film-forming temperature (MFT) of more than 5° C.Type: GrantFiled: October 24, 2006Date of Patent: October 30, 2012Assignee: Mitsui Chemicals, Inc.Inventors: Akinori Etoh, Keiichi Taki, Shinjirou Sakurai, Tomokazu Ishizuka, Yasuo Okada
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Publication number: 20090258784Abstract: A heat-sensitive recording material includes a heat-sensitive recording layer on a support which layer produces a color upon heating, and a protective layer on the heat-sensitive recording layer. The protective layer is obtained from a composition (A) based on an emulsion of a copolymer resin (a). The copolymer resin (a) includes a vinyl monomer component having a carboxyl group, and a vinyl monomer component copolymerizable with the vinyl monomer component. The copolymer resin (a) contains 1 to 10 parts by weight of the vinyl monomer component having a carboxyl group. The copolymer resin has a SP value (solubility parameter) of not less than 9.5 (cal/cm3)1/2 and a glass transition temperature (Tg) of 20 to 130° C. The emulsion of the copolymer resin (a) has a minimum film-forming temperature (MFT) of more than 5° C.Type: ApplicationFiled: October 24, 2006Publication date: October 15, 2009Inventors: Akinori Etoh, Keiichi Taki, Shinjirou Sakurai, Tomokazu Ishizuka, Yasuo Okada
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Patent number: 7307042Abstract: The present invention provides a thermal recording material, which is easy to manufacture and has excellent productivity, water resistance, heat resistance (running stability) and chemical resistance, by solving various problems caused by using a crosslinking agent for a protective layer. The thermal recording material of the present invention comprises a protective layer mainly composed of a resin emulsion (a) comprising a copolymer resin emulsion (b) containing (meth)acrylonitrile and a vinyl monomer copolymerizable therewith, and having an SP value (solubility parameter) of 12.0 or more, a glass transition temperature (Tg) of 10 to 70° C., and a minimum film-forming temperature (MFT) of 5° C. or less, and a polyolefin copolymer resin emulsion (c).Type: GrantFiled: August 6, 2003Date of Patent: December 11, 2007Assignee: Mitsui Chemicals, Inc.Inventors: Shinjirou Sakurai, Keiichi Taki
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Publication number: 20060166821Abstract: The present invention provides a thermal recording material, which is easy to manufacture and has excellent productivity, water resistance, heat resistance (running stability) and chemical resistance, by solving various problems caused by using a crosslinking agent for a protective layer. The thermal recording material of the present invention comprises a protective layer mainly composed of a resin emulsion (a) comprising a copolymer resin emulsion (b) containing (meth)acrylonitrile and a vinyl monomer copolymerizable therewith, and having an SP value (solubility parameter) of 12.0 or more, a glass transition temperature (Tg) of 10 to 70° C., and a minimum film-forming temperature (MFT) of 5° C. or less, and a polyolefin copolymer resin emulsion (c).Type: ApplicationFiled: August 6, 2003Publication date: July 27, 2006Applicant: MITSUI CHEMICALS, INC.Inventors: Shinjirou Sakurai, Keiichi Taki