Patents by Inventor Masazumi Sasabe
Masazumi Sasabe 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: 6730712Abstract: A method for producing a porous cross-linked polymer sheet capable of slicing quickly is provided. This method comprises a step for obtaining a porous cross-linked polymer by forming and polymerizing an HIPE, a step for dehydrating the porous cross-linked polymer, and a step for subsequently slicing the dehydrated porous cross-linked polymer. According to this invention, by performing the step of dehydration prior to the conventional step of slicing, it is made possible to prevent the porous cross-linked polymer from adhering to the blade and the guides provided for a slicer, and allow the slicing to be attained quickly. By removing the salt from the polymer, it is further made possible to prevent a production device from gathering rust and the porous cross-linked polymer from permitting adhesion of rust thereto.Type: GrantFiled: September 27, 2002Date of Patent: May 4, 2004Assignee: Nippon Shokubai Co., Ltd.Inventors: Masazumi Sasabe, Katsuhiko Sakamoto, Kozo Nogi, Motohiro Arakawa
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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: 20040061251Abstract: This invention provides a method which is capable of continuously supplying an HIPE into a plurality of mold elements and allowing quantity manufacture of porous products of a complicated shape without entailing occurrence of a molding flash.Type: ApplicationFiled: July 15, 2003Publication date: April 1, 2004Inventors: Katsuhiko Sakamoto, Masazumi Sasabe
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Publication number: 20030181115Abstract: An object of the present invention is to provide an absorbent structure, its production process, and an absorbent article comprising the absorbent structure, wherein, in the absorbent structure, a water-absorbent resin is fixed, and the restrictions, due to this fixation, on the swelling are small, and the absorbent structure is excellent in absorption properties and usable favorably for thin type absorbent articles in which the water-absorbent resin is used in an increased amount.Type: ApplicationFiled: January 28, 2003Publication date: September 25, 2003Inventors: Kinya Nagasuna, Motohiro Imura, Kenji Kadonaga, Hiroki Inoue, Masazumi Sasabe, Kenji Minami
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Publication number: 20030153637Abstract: A method for producing a porous cross-linked polymer sheet capable of slicing quickly is provided. This method comprises a step for obtaining a porous cross-linked polymer by forming and polymerizing an HIPE, a step for dehydrating the porous cross-linked polymer, and a step for subsequently slicing the dehydrated porous cross-linked polymer. According to this invention, by performing the step of dehydration prior to the conventional step of slicing, it is made possible to prevent the porous cross-linked polymer from adhering to the blade and the guides provided for a slicer, and allow the slicing to be attained quickly. By removing the salt from the polymer, it is further made possible to prevent a production device from gathering rust and the porous cross-linked polymer from permitting adhesion of rust thereto.Type: ApplicationFiled: September 27, 2002Publication date: August 14, 2003Inventors: Masazumi Sasabe, Katsuhiko Sakamoto, Kozo Nogi, Motohiro Arakawa
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Publication number: 20030036575Abstract: A method for dehydrating a porous cross-linked polymer conveniently to a low final water content is provided. A porous cross-linked polymer sheet is produced by a method which comprises causing a porous cross-linked polymer obtained by forming and polymerizing a water-in-oil type higher internal phase emulsion to be dehydrated by the use of non-woven fabric rolls furnished with an aspiration mechanism. Properly in this case, the porous cross-linked polymer is subjected to preliminary squeezing. In accordance with the present invention, a porous cross-linked polymer abounding in a water absorbing property to be dehydrated to a low final water content with a small number of rolls.Type: ApplicationFiled: June 13, 2002Publication date: February 20, 2003Inventors: Masazumi Sasabe, Katsuhiko Sakamoto, Kozo Nogi, Motohiro Arakawa
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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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Publication number: 20020193455Abstract: This invention has an object thereof to provide a method for producing an HIPE polymer which can prevent the HIPE from leaking, allow the formed HIPE including the opposite end parts thereof to acquire and retain an expected thickness, prevent the formed HIPE from failing to polymerize due to a decrease in an oxygen content, and allow the formed HIPE to retain a sheet such as an upper film. Such an object of this invention can be accomplished by a method for the production of a porous cross-linked polymer by the horizontal continuous polymerization of an HIPE, which comprises using weirs one each in the opposite end parts in the width direction of an HIPE supporting member to be used for the horizontal continuous polymerization of the HIPE.Type: ApplicationFiled: May 29, 2002Publication date: December 19, 2002Inventors: Masazumi Sasabe, Katsuhiko Sakamoto, Kozo Nogi
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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: 6395792Abstract: An object of this invention is to provide a method for the production of a porous cross-linked polymer, which permits the polymerization (curing) of a water in oil type high internal phase emulsion (HIPE) in such an exceptionally brief time as not more than 30 minutes, preferably not more than 10 minutes without impairing the stability of the HIPE. The object of this invention mentioned above can be accomplished by a method for the production of a porous cross-linked polymer which comprises steps of mixing an oil phase containing a polymerizing monomer, a cross-linking monomer, and a surfactant as essential components with a water phase containing water as an essential component thereby obtaining a water in oil type high internal phase emulsion and heating said emulsion to a prescribed curing temperature thereby polymerizing the emulsion, wherein said emulsion is formed in a thickness of not more than 50 mm and the temperature-increasing rate of the emulsion is not less than 5° C./minute.Type: GrantFiled: October 12, 2000Date of Patent: May 28, 2002Assignee: Nippon Shokubai Co., Ltd.Inventors: Kinya Nagasuna, Hirotama Fujimaru, Kenji Kadonaga, Kozo Nogi, Katsuhiko Sakamoto, Masazumi Sasabe, Kenji Minami
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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: 6274638Abstract: This invention is targeted at providing a method for producing a porous cross-linked polymer material excelling in absorption properties and mechanical strength in a short period of time. In the production of a porous cross-linked polymer material from an HIPE, the method of this invention is characterized by comprising a step of polymerizing the HIPE till the bromine value thereof falls to not more than 25% of the value existing prior to the polymerization and a subsequent step of after curing the porous cross-linked polymer material by means of an active energy ray or a temperature higher than the polymerization temperature.Type: GrantFiled: November 14, 2000Date of Patent: August 14, 2001Assignee: Nippon Shokubai Co., Ltd.Inventors: Koichi Yonemura, Hiroshi Yamazaki, Masazumi Sasabe, Hirotama Fujimaru, Kinya Nagasuna
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Patent number: 6191229Abstract: The present invention provides (meth)acryl syrup which shows excellent storage stability as a molding material, and also provides a method of manufacturing the (meth)acryl syrup in a shorter period of time compared with the conventional method, and a molding material which permits a molded article having excellent heat-resistance, solvent-resistance, weathering resistance, and water-resistance, etc., to be manufactured. The (meth)acryl syrup is manufactured, for example, by polymerizing a monomer component including (meth)acrylic ester and a vinyl monomer having a carboxyl group in a presence of a thiol compound, and subsequently processing the reaction mixture with maleic anhydride and a basic compound. The molding material includes the (meth)acryl syrup, and may also include a thickening agent, derivatives of succinic acid, a reinforcing material, etc.Type: GrantFiled: June 4, 1997Date of Patent: February 20, 2001Assignee: Nippon Shokubai Co., Ltd.Inventors: Masazumi Sasabe, Akihiko Fukada, Keiichiro Mizuta
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Patent number: 5073612Abstract: A hydrophilic polymer having the water absorption capacity thereof 1 to 30 times to its own weight by a process of manufacture which comprises preparing a monomer component comprising (a) 2 to 25 mol % of a hydroxyl group-containing alpha,beta-ethylenically unsaturated monomer, (b) 5 to 30 mol % of a carboxyl group-containing alpha,beta-ethylenically unsaturated monomer, and (c) 93 to 45 mol % of a carboxylate group-containing alpha,beta-ethylenically unsaturated monomer, providing that the total of (b) and (c) is in the range of 98 to 75 mol %, radically polymerizing said monomer component, and heat-treating the resultant polymer thereby causing the hydroxyl group and carboxyl group possessed by the polymer to react with each other and form a crosslinked structure, a method for the production thereof, and uses found therefor including a cation sequestrating resin, a coolant and a coating material.Type: GrantFiled: December 27, 1988Date of Patent: December 17, 1991Assignee: Nippon Shokubai Kagaku Kogyo, Co., Ltd.Inventors: Yoshio Irie, Shigeyasu Morihiro, Teruaki Fujiwara, Masazumi Sasabe, Kaoru Iwasaki
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Patent number: 4892902Abstract: A method for the production of an aqueous dispersion by the dispersion of an inorganic pigment such as calcium carbonate and aluminum hydroxide in an aqueous medium, which method comprises incorporating in said inorganic pigment as a dispersant a carboxyl group-containing water-soluble polymer possessing a number average molecular weight in the range of 2,000 to 80,000 and/or a water-soluble condensed phospate and a water-soluble anionic modified polyvinyul alcohol possessing a polymerization degree in the range of 30 to 700, a saponification degree in the range of 30 to 100 mol %, and an anionic modification degree in the range of 0.5 to 20 mol %.Type: GrantFiled: March 27, 1989Date of Patent: January 9, 1990Assignee: Nippon Shokubai Kagaku, Co., Ltd.Inventors: Shobu Shioji, Masazumi Sasabe, Yorimichi Dairoku, Teruaki Fujiwara
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Patent number: 4818783Abstract: A method for the production of an aqueous dispersion by the dispersion of an inorganic pigment such as calcium carbonate and aluminum hydroxide in an aqueous medium, which method comprises incorporating in said inorganic pigment as a dispersant a carboxyl group-containing water-soluble polymer possessing a number average molecular weight in the range of 2,000 to 80,000 and/or a water-soluble condensed phosphate and a water-soluble anionic modified polyvinyl alcohol possessing a polymerization degree in the range of 30 to 700, a saponification degree in the range of 30 to 100 mol %, and an anionic modification degree in the range of 0.5 to 20 mol %.Type: GrantFiled: November 6, 1987Date of Patent: April 4, 1989Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.Inventors: Shobu Shioji, Masazumi Sasabe, Yorimichi Dairoku, Teruaki Fujiwara