Patents by Inventor Tsutomu Naganawa
Tsutomu Naganawa 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: 8835555Abstract: The present invention has an objective to easily obtain an emulsion exhibiting superior storage stability, and in particular, an emulsion of a polyorganosiloxane. The present invention provides a method for producing an emulsion characterized by obtaining an emulsion by emulsifying a mixture of an oil and a surfactant, obtained by synthesizing the surfactant in the oil. In particular, the method is suitably used for the preparation of an emulsion of an organopolysiloxane (A) which is usually difficult to be stably emulsified. A silicone-based surfactant (B), and in particular, a silicone-based surfactant having a small degree of polymerization of a siloxane chain such as a trisiloxane is synthesized in an oil. Thereby, an emulsion exhibiting superior storage stability can be produced.Type: GrantFiled: December 21, 2009Date of Patent: September 16, 2014Assignee: Dow Corning Toray Co. Ltd.Inventors: Kazuhiko Kojima, Tsutomu Naganawa, Asao Harashima
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Patent number: 8623958Abstract: An oil-in-water silicone emulsion composition comprising (A) 100 mass parts of a polyorganosiloxane that contains in each molecule at least two silicon-bonded hydroxyl or hydrolyzable groups, (B) 0.1 to 200 mass parts of a colloidal silica, (C) 1 to 100 mass parts of an ionic emulsifying agent, (D) 0.1 to 50 mass parts of a polyoxyethylene-polyoxypropylene copolymer-type nonionic emulsifying agent, and (E) 10 to 200 mass parts water. Such oil-in-water silicone emulsion composition exhibits an excellent storage stability, contains little low molecular weight silicone, and can form, even without the use of a tin catalyst, a cured film that exhibits a satisfactory elasticity, through the removal of the water fraction.Type: GrantFiled: March 5, 2010Date of Patent: January 7, 2014Assignee: Dow Corning Toray Co. Ltd.Inventors: Kazuhiko Kojima, Tsutomu Naganawa
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Patent number: 8546483Abstract: To provide a highly storage-stable nonionic oil-in-water organosiloxane emulsion composition that substantially does not contain ionic surfactant and that on a long-term basis does not undergo separation of the emulsion composition. An oil-in-water organosiloxane emulsion composition that characteristically comprises (A) 100 weight parts of organosiloxane, (B) 0.5 to 35 weight parts of organic-modified organosiloxane, (C) 0.5 to 35 weight parts of nonionic surfactant, (D) 0.5 to 15 weight parts of water-soluble solvent, and (E) water, wherein the content of (F) ionic surfactant in the composition is less than 0.1 weight part per 100 weight parts component (A).Type: GrantFiled: March 18, 2009Date of Patent: October 1, 2013Assignee: Dow Corning Toray Company, Ltd.Inventors: Hidefumi Tanaka, Tsutomu Naganawa
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Publication number: 20120035275Abstract: The present invention has objectives to provide an emulsion suitable as a cosmetic raw material and to easily obtain the aforementioned emulsion of organopolysiloxane exhibiting superior storage stability. The present invention provides an emulsion comprising (A) an organopolysiloxane, (B) a methyl polyglycerol-modified silicone-based surfactant having a specified structure, and (C) an aqueous medium, and provides a method for producing an emulsion characterized by obtaining an emulsion by emulsifying a mixture of (A) a organopolysiloxane and (B) a silicone-based surfactant, which is obtained by synthesizing the silicone-based surfactant of component (B) in the component (A).Type: ApplicationFiled: December 21, 2009Publication date: February 9, 2012Inventors: Kazuhiko Kojima, Tsutomu Naganawa, Asao Harashima, Tadashi Okawa
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Publication number: 20120004354Abstract: An oil-in-water silicone emulsion composition comprising (A) 100 mass parts of a polyorganosiloxane that contains in each molecule at least two silicon-bonded hydroxyl or hydrolyzable groups, (B) 0.1 to 200 mass parts of a colloidal silica, (C) 1 to 100 mass parts of an ionic emulsifying agent, (D) 0.1 to 50 mass parts of a polyoxyethylene-polyoxypropylene copolymer-type nonionic emulsifying agent, and (E) 10 to 200 mass parts water. Such oil-in-water silicone emulsion composition exhibits an excellent storage stability, contains little low molecular weight silicone, and can form, even without the use of a tin catalyst, a cured film that exhibits a satisfactory elasticity, through the removal of the water fraction.Type: ApplicationFiled: March 5, 2010Publication date: January 5, 2012Inventors: Kazuhiko Kojima, Tsutomu Naganawa
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Publication number: 20110319557Abstract: An oil-in-water silicone emulsion composition comprising (A) 100 mass parts of a polyorganosiloxane that contains in each molecule at least two groups selected from the group consisting of the silicon-bonded hydroxyl group, silicon-bonded alkoxy groups, and silicon-bonded alkoxyalkoxy groups, (B) 0.1 to 200 mass parts of a colloidal silica, (C) 0.1 to 100 mass parts of an aminoxy group-containing organosilicon compound that contains at least three silicon-bonded aminoxy groups in each molecule, (D) 0.1 to 50 mass parts of a surfactant, and (E) 10 to 200 mass parts water. Such oil-in-water silicone emulsion composition that contains little low molecular weight silicone can form, even without the use of a tin catalyst, a cured film that exhibits a satisfactory strength and a satisfactory adherence to substrate, through the removal of the water fraction.Type: ApplicationFiled: March 5, 2010Publication date: December 29, 2011Inventors: Kazuhiko Kojima, Tsutomu Naganawa, Masaru Ozaki
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Publication number: 20110257274Abstract: The present invention has an objective to easily obtain an emulsion exhibiting superior storage stability, and in particular, an emulsion of a polyorganosiloxane. The present invention provides a method for producing an emulsion characterized by obtaining an emulsion by emulsifying a mixture of an oil and a surfactant, obtained by synthesizing the surfactant in the oil. In particular, the method is suitably used for the preparation of an emulsion of an organopolysiloxane (A) which is usually difficult to be stably emulsified. A silicone-based surfactant (B), and in particular, a silicone-based surfactant having a small degree of polymerization of a siloxane chain such as a trisiloxane is synthesized in an oil. Thereby, an emulsion exhibiting superior storage stability can be produced.Type: ApplicationFiled: December 21, 2009Publication date: October 20, 2011Inventors: Kazuhiko Kojima, Tsutomu Naganawa, Asao Harashima
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Publication number: 20110129660Abstract: A water-repellent lightweight cellular concrete panel having on its surface a water-repellent treatment layer provided by a water-based emulsion of a non-film-forming amino-modified organopolysiloxane. A water-based emulsion of a non-film-forming amino-modified organopolysiloxane is applied, by a spray method or a roller coating method, on the surface of lightweight cellular concrete panel and drying is carried out. An O/W water-based emulsion of a non-film-forming amino-modified organopolysiloxane that has an amine equivalent weight of 500 to 100,000 gram/mol and a viscosity at 25° C. of 50 to 1,000,000 mPa·s.Type: ApplicationFiled: March 11, 2009Publication date: June 2, 2011Inventors: Kenji Jimpachi, Masakado Kennoki, Tsutomu Naganawa
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Publication number: 20110052521Abstract: To provide a highly storage-stable nonionic oil-in-water organosiloxane emulsion composition that substantially does not contain ionic surfactant and that on a long-term basis does not undergo separation of the emulsion composition. An oil-in-water organosiloxane emulsion composition that characteristically comprises (A) 100 weight parts of organosiloxane, (B) 0.5 to 35 weight parts of organic-modified organosiloxane, (C) 0.5 to 35 weight parts of nonionic surfactant, (D) 0.5 to 15 weight parts of water-soluble solvent, and (E) water, wherein the content of (F) ionic surfactant in the composition is less than 0.1 weight part per 100 weight parts component (A).Type: ApplicationFiled: March 18, 2009Publication date: March 3, 2011Inventors: Hidefumi Tanaka, Tsutomu Naganawa
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Patent number: 6441105Abstract: A synthetic fiber treatment agent composition capable of providing synthetic fibers, particularly synthetic fiber padding, with a better hand, smoothness, repulsion, and the like. The composition comprises an amino group-containing polyorganosiloxane with a high amino group content and specific terminal groups, and an amino group-containing polydiorganosiloxane with a low amino group content or a polydiorganosiloxane with no amino groups.Type: GrantFiled: April 16, 2001Date of Patent: August 27, 2002Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Tsutomu Naganawa, Masaru Ozaki, Isao Ona, Tadashi Takimoto
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Patent number: 6416558Abstract: A water based fiber treatment agent and fiber treatment method impart to treated fibers a perfect smoothness, lubricity, reduced tackiness, and pleasant tactile sensations. The water based fiber treatment agent contains a silicone oil emulsion of crosslinked silicone particles with an average diameter of 0.01 to 100 &mgr;m which are in silicone oil drops having an average diameter of 0.05 to 500 &mgr;m, and then the silicone oil drops are dispersed in water. The diameter of the crosslinked silicone particles is smaller than the diameter of the silicone oil drops.Type: GrantFiled: May 8, 2000Date of Patent: July 9, 2002Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Isao Ona, Hiroki Ishikawa, Tsutomu Naganawa, Kazuo Kobayashi, Yoshitsugu Morita
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Patent number: 6416557Abstract: The present invention relates to a water-based fiber treatment agent that has the ability to equip fibers with such properties as an excellent smoothness and lubricity, a reduced tack, and an appropriate or moderate slickness.Type: GrantFiled: September 15, 1999Date of Patent: July 9, 2002Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Isao Ona, Hiroki Ishikawa, Tsutomu Naganawa, Kazuo Kobayashi, Yoshitsugu Morita
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Patent number: 6409934Abstract: A polyester fiber treatment composition is capable of imparting good handle to polyester fiber, particularly polyester fiber wadding, padding, or fill, and consists of a water-based emulsion containing (A) an aminofunctional organopolysiloxane endblocked by alkoxy groups at its molecular chain terminals, (B) an aminofunctional organopolysiloxane endblocked by silanol groups at its molecular chain terminals, (C) a nonionic surfactant, and (D) water.Type: GrantFiled: October 23, 2000Date of Patent: June 25, 2002Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Tsutomu Naganawa, Isao Ona, Tadashi Takimoto
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Patent number: 6398860Abstract: A sizing agent composition for printing paper comprising (A) a water-soluble diorganopolysiloxane described by formula where each R is independently selected from the group consisting of a hydrogen atom, methyl group, and ethyl group, each R1 is an independently selected monovalent hydrocarbon group comprising 1 to 20 carbon atoms, Q is an organic group comprising an amino group or quaternary ammonium salt, m is an integer equal to or greater than 2, n is 0 or an integer equal to or greater than 1, and (m+n) is in the range of 2 to 100; (B) a sizing agent; and (C) water.Type: GrantFiled: August 4, 2000Date of Patent: June 4, 2002Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Isao Ona, Hiroki Ishikawa, Tadashi Takimoto, Tsutomu Naganawa
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Publication number: 20020035186Abstract: A diorganopolysiloxane/acrylate ester copolymer containing emulsion composition for fabric treatment cures at room temperature through removal of water with formation of flexible and highly flame retardant coatings that do not crack even at very low temperatures. Highly flame retardant fabrics can be provided by treatment with the emulsion composition. The emulsion composition contains (A) an emulsion of a copolymer of (a-1) an hydroxyl endblocked diorganopolysiloxane having at least two silicon bonded alkenyl groups in each molecule, and (a-2) an acrylate ester monomer; (B) colloidal silica; (C) a condensation catalyst, and (D) an inorganic flame retardant.Type: ApplicationFiled: July 26, 2001Publication date: March 21, 2002Inventors: Isao Ona, Tsutomu Naganawa
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Publication number: 20020019460Abstract: A synthetic fiber treatment agent composition capable of providing synthetic fibers, particularly synthetic fiber padding, with a better hand, smoothness, repulsion, and the like. The composition comprises an amino group-containing polyorganosiloxane with a high amino group content and specific terminal groups, and an amino group-containing polydiorganosiloxane with a low amino group content or a polydiorganosiloxane with no amino groups.Type: ApplicationFiled: April 16, 2001Publication date: February 14, 2002Applicant: Info.Disc., Citations, Cert. CopyInventors: Tsutomu Naganawa, Masaru Ozaki, Isao Ona, Tadashi Takimoto
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Patent number: 6319980Abstract: An organic silicon compound emulsion for quickly imparting excellent water-repellent properties to the surfaces of porous inorganic base materials such as concrete, mortar, and masonry. The emulsion is prepared by the steps of emulsifying a mixture consisting of (A) an organoalkoxysilane, (B) an organopolysiloxane having in its molecule at least 2 alkoxy groups or hydroxyl groups bonded to a silicon atom, (C) an anionic emulsifying agent, and (D) water, and heat aging the emulsion at a temperature below 100° C. In another embodiment, the method comprises the steps emulsifying a mixture of the components (A) to (D) and adding an acidic or alkaline substance to the emulsion. In a third embodiment, the method comprises the steps of forming a mixture consisting of the components (A) to (D), adding an acidic or alkaline substance thereto, and performing the emulsification thereafter.Type: GrantFiled: October 19, 1999Date of Patent: November 20, 2001Assignee: Dow Corning Toray Silicone Company, Ltd.Inventors: Hiroki Ishikawa, Atsushi Sakuma, Tsutomu Naganawa, Naohiro Muramoto, Isao Ona
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Patent number: 6300287Abstract: A parting agent for a copier toner is disclosed. The parting agent exhibits no loss of parting properties or generation of gel under high-temperature conditions near 200° C., and causes no problems with paper feed or the like. The parting agent is composed of a diorganopolysiloxane of the average unit formula: RaSiO4−a/2, where the R groups are the same or different and are substituted or unsubstituted monovalent hydrocarbon groups, with at least 50 mol % of the R groups being methyl groups, and 1.95 ≦a≦2.20. The diorganopolysiloxane has a viscosity of 10 to 100,000 centistokes at 25° C., and generates no more than 5 ppm (by weight) of formaldehyde per hour when kept at 200° C. in an air atmosphere.Type: GrantFiled: April 27, 2000Date of Patent: October 9, 2001Assignee: Dow Corning Toray Silicone Company, Ltd.Inventors: Hiroki Ishikawa, Tsutomu Naganawa, Isao Ona
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Patent number: 6267842Abstract: A water-based treatment agent for tissue paper suppresses any feeling of slipperiness or wetness in ordinary tissue paper and toilet paper so the paper has a dry touch, ample smoothness, and a clean, smooth, tactile impression. It also provides the paper with a superior softness. The water-based treatment agent consists of a silicone oil emulsion in which crosslinked silicone particles with a mean particle size of 0.01-100 &mgr;m are contained in silicone oil droplets with a mean particle size of 0.05-500 &mgr;m, which are dispersed in water. The particle size of the crosslinked silicone particles is smaller than the particle size of the silicone oil droplets.Type: GrantFiled: May 22, 2000Date of Patent: July 31, 2001Assignee: Dow Corning Toray Silicone Company, Ltd.Inventors: Isao Ona, Hiroki Ishikawa, Tsutomu Naganawa, Kazuo Kobayashi, Yoshitsugu Morita
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Patent number: 6211284Abstract: A highly storage-stable organopolysiloxane composition capable of the long-term retention of its surface-modifying activities, such as antistatic and anticlouding activities is disclosed. The composition comprises a first polyoxyalkylene-functional diorganopolysiloxane that is free of amino, carboxyl, and epoxy groups, a second polyoxyalkylene-functional diorganopolysiloxane that contains an amino-functional organic group, and water.Type: GrantFiled: June 22, 1999Date of Patent: April 3, 2001Assignee: Dow Corning Toray Silicone Co.Inventors: Hiroki Ishikawa, Tsutomu Naganawa, Masaru Ozaki, Isao Ona