Patents by Inventor Akiko Mitsuhashi
Akiko Mitsuhashi 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: 8426670Abstract: The present invention provides: an absorbent structure and an absorbent article, which are excellent in both liquid diffusion ability and liquid storage ability, and which are excellent in the dry feeling and the amount of wet back of the aqueous liquid, and which can realize the thinning and lightening more; and a water-absorbent resin fitly usable for the above absorbent structure and absorbent article. The absorbent structure, according to the present invention, comprises a liquid-diffusing member and a water-absorbent resin, with the absorbent structure being characterized in that when the capillary absorption index of the liquid-diffusing member at a height of 40 cm is referred to as A (A?0.10), the capillary absorption index B of the water-absorbent resin at a height of 40 cm satisfies the following equation: B/A?0.7 (equation 1).Type: GrantFiled: September 18, 2002Date of Patent: April 23, 2013Assignee: Nippon Shokubai Co., Ltd.Inventors: Kinya Nagasuna, Kenji Kadonaga, Akiko Mitsuhashi, Motohiro Imura
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Patent number: 6730711Abstract: A method for the production of a porous cross-linked polymer material by the polymerization of an HIPE containing a cross-linking agent, characterized by the fact at least one species of the cross-linking agent is a compound having a double bond equivalent f not less than 120 g/mol. The cross-linking agent is preferred to be a compound possessed of an alkylene oxide moiety or a vinyl polymer containing not less than two polymerizing double bonds in the molecular unit. Thus, it is made possible to produce a porous cross-linked polymer material excellent in absorbency and flexibility, permit the HIPE to be polymerized in a short time, and therefore improve the efficiency of production.Type: GrantFiled: June 13, 2002Date of Patent: May 4, 2004Assignees: Nippon Shokubai Co., Ltd., The Proctor & Gamble CompanyInventors: Masazumi Sasabe, Kenji Kadonaga, Hiroki Inoue, Akiko Mitsuhashi, Hirotama Fujimaru, Masatoshi Yoshida, Masuji Izubayashi, Kazutomo Takahashi
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Publication number: 20040019342Abstract: The present invention provides: an absorbent structure and an absorbent article, which are excellent in both liquid diffusion ability and liquid storage ability, and which are excellent in the dry feeling and the amount of wet back of the aqueous liquid, and which can realize the thinning and lightening more; and a water-absorbent resin fitly usable for the above absorbent structure and absorbent article. The absorbent structure, according to the present invention, comprises a liquid-diffusing member and a water-absorbent resin, with the absorbent structure being characterized in that when the capillary absorption index of the liquid-diffusing member at a height of 40 cm is referred to as A (A≧0.10), the capillary absorption index B of the water-absorbent resin at a height of 40 cm satisfies the following equation: B/A≧0.7 (equation 1).Type: ApplicationFiled: May 12, 2003Publication date: January 29, 2004Inventors: Kinya Nagasuna, Kenji Kadonaga, Akiko Mitsuhashi, Motohiro Imura
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Patent number: 6649665Abstract: In producing a porous cross-linked polymer by forming a water-in-oil type high internal phase emulsion and subsequently polymerizing the emulsion, a method for the production of a porous cross-linked polymer material which comprises a step of polymerizing a water-in-oil type high internal phase emulsion obtained in the presence of a polyglycerine fatty acid ester. This invention permits an HIPE to be polymerized at a high temperature for the purpose of stabilizing the HIPE and consequently warrants quick production of a porous cross-linked polymer material possessed of an excellent water absorbing property.Type: GrantFiled: June 13, 2002Date of Patent: November 18, 2003Assignees: Nippon Shokubai Co., Ltd., The Proctor & Gamble CompanyInventors: Kenji Kadonaga, Akiko Mitsuhashi, Kazutomo Takahashi
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Publication number: 20030139482Abstract: In producing a porous cross-linked polymer by forming a water-in-oil type high internal phase emulsion and subsequently polymerizing the emulsion, a method for the production of a porous cross-linked polymer material which comprises a step of polymerizing a water-in-oil type high internal phase emulsion obtained in the presence of a polyglycerine fatty acid ester. This invention permits an HIPE to be polymerized at a high temperature for the purpose of stabilizing the HIPE and consequently warrants quick production of a porous cross-linked polymer material possessed of an excellent water absorbing property.Type: ApplicationFiled: June 13, 2002Publication date: July 24, 2003Inventors: Kenji Kadonaga, Akiko Mitsuhashi, Kazutomo Takahashi
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Publication number: 20020193456Abstract: A method for the production of a porous cross-linked polymer material by the polymerization of an HIPE containing a cross-linking agent, characterized by the fact at least one species of the cross-linking agent is a compound having a double bond equivalent f not less than 120 g/mol. The cross-linking agent is preferred to be a compound possessed of an alkylene oxide moiety or a vinyl polymer containing not less than two polymerizing double bonds in the molecular unit. Thus, it is made possible to produce a porous cross-linked polymer material excellent in absorbency and flexibility, permit the HIPE to be polymerized in a short time, and therefore improve the efficiency of production.Type: ApplicationFiled: June 13, 2002Publication date: December 19, 2002Inventors: Masazumi Sasabe, Kenji Kadonaga, Hiroki Inoue, Akiko Mitsuhashi, Hirotama Fujimaru, Masatoshi Yoshida, Masuji Izubayashi, Kazutomo Takahashi
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Patent number: 6395793Abstract: An object of this invention is to provide a method for the production of a porous material by polymerizing a water-in-oil type high internal phase emulsion in a briefer time than a conventional technique without impairing the stability of the emulsion. The object of this invention can be accomplished by a method for the production of a porous material comprising a step of polymerizing a water-in-oil type high internal phase emulsion containing a polymerization initiator, wherein the polymerization initiator is a redox type initiator combining a water-soluble oxidizing agent and a reducing agent, the reducing agent is preparatorily added to form the emulsion, and thereafter the water-soluble oxidizing agent is added to the emulsion to polymerize the added emulsion.Type: GrantFiled: November 14, 2000Date of Patent: May 28, 2002Assignee: Nippon Shokubai Co., Ltd.Inventors: Kenji Kadonaga, Akiko Mitsuhashi, Hirotama Fujimaru, Masazumi Sasabe, Kazutomo Takahashi, Masuji Izubayashi
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Patent number: 6362243Abstract: This invention has for an object thereof the provision of a method for the production of a porous cross-linked polymer which can freely control the upper and lower surface behavior of the porous cross-linked polymer, the width and the thickness of the polymer and can perform continuously a process ranting from a step of supplying the emulsion through a step of polymerizing it. The object of this invention, in the production of a porous cross-linked polymer by polymerizing a water-in-oil type high internal phase emulsion, is accomplished by a method for the production of a porous cross-linked polymer characterized by performing continuously a process ranting from a step of supplying the emulsion through a step of polymerizing it while having the outer surface part of the emulsion retain an atmosphere or a state having a lower oxygen content than the ambient air.Type: GrantFiled: September 8, 2000Date of Patent: March 26, 2002Assignee: Nippon Shokubai Co., Ltd.Inventors: Masazumi Sasabe, Katsuhiko Sakamoto, Hiroshi Yamazaki, Koichi Yonemura, Kenji Kadonaga, Akiko Mitsuhashi, Kazutomo Takahashi, Kozo Nogi, Kenji Minami
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Patent number: 6323250Abstract: An object of this invention is to provide a method for the production of a porous material by polymerizing a water-in-oil type high internal phase emulsion in a briefer time than a conventional technique without impairing the stability of the emulsion. The object of this invention can be accomplished by a method for the production of a porous material comprising a step of polymerizing a water-in-oil type high internal phase emulsion containing a polymerization initiator, wherein the polymerization initiator is a redox type initiator combining an oil-soluble oxidizing agent and a reducing agent, either of the oil-soluble oxidizing agent or the reducing agent is preparatorily added to form the emulsion, and thereafter the remainder of the reducing agent or the oil-soluble oxidizing agent is added to the emulsion to polymerize the added emulsion.Type: GrantFiled: November 14, 2000Date of Patent: November 27, 2001Assignee: Nippon Shokubai Co. LTDInventors: Kenji Kadonaga, Akiko Mitsuhashi, Hirotama Fujimaru, Masazumi Sasabe, Kazutomo Takahashi, Masuji Izubayashi
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Patent number: 5792855Abstract: Water-absorbent resins which are prepared by mixing polysaccharides with amino acids (amino acids and/or polymers of amino acids) and heating the mixture so as to cause a crosslinking reaction therein. Each of the water-absorbent resins has a water-absorbing ratio of not less than 10 g/g with respect to physiologic saline as well as having a rate of biodegradability of not less than 10%. Moreover, its water-absorbing ratio under pressure is not less than 10 ml/g with respect to physiologic saline. The water-absorbing ratio under pressure is measured by using a measuring device that is constituted of a weighing machine, a container, an air-intake pipe, a conduit, a glass filter, and a measuring section. The water-absorbent resins are superior in both water-absorbing capacity and biodegradability, and are capable of maintain their water-absorbing capacity even under pressure.Type: GrantFiled: January 24, 1997Date of Patent: August 11, 1998Assignee: Nippon Shokubai Co., Ltd.Inventors: Koichi Yonemura, Kazuhisa Hitomi, Akiko Mitsuhashi, Takaya Hayashi, Nobuyuki Harada