Patents by Inventor Ryoji Toita
Ryoji Toita 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: 8518524Abstract: The invention provides a transparent composite material comprising a cured product of a three-dimensionally crosslinkable resin composition containing tabular inorganic substance having a number-average particle size of 10 to 300 nm and an aspect ratio of 10 to 300 dispersed therein, which material has a small coefficient of thermal expansion against surrounding temperature changes and can be suitably applicable as substrate for display devices, to thereby overcome disadvantages in substrate for display devices using conventional materials that differences in thermal shrinkage between a substrate and an transparent electrode cause cracks in the transparent electrode, resulting in increasing resistance and causing disconnection, and further can provide a display device with high durability.Type: GrantFiled: July 20, 2007Date of Patent: August 27, 2013Assignee: Showa Denko K.K.Inventors: Yasushi Kadowaki, Kazufumi Kai, Ryoji Toita
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Patent number: 8460501Abstract: This invention relates to a method for producing a cured film, which comprises a first step of applying a curable resin composition onto a surface of a first substrate and a surface of a second substrate respectively; a second step of bonding the curable resin composition layers provided on each surface of the first and second substrates to each other; and a third step of curing the curable resin composition layer between the first and the second substrates. The present invention enables production of a cured film in which the amount of thermal deformation such as warpage upon heating/cooling is suppressed, and the film can be suitably used as a plastic substrate for a display such as a liquid crystal display device and an organic EL display device, a substrate for a display, such as a substrate for electronic paper and the like, and a substrate for a solar cell.Type: GrantFiled: April 13, 2009Date of Patent: June 11, 2013Assignee: Showa Denko K.K.Inventors: Yasushi Kadowaki, Ryoji Toita, Kenji Shimamura
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Patent number: 8163842Abstract: This invention relates to a method for producing a transparent composite material comprising a first step of subjecting a synthetic smectite having a number average particle diameter of from 10 to 300 nm and an aspect ratio of from 10 to 300 to organizing treatment with an organic quaternary ammonium salt and/or an organic quaternary phosphonium salt; a second step of mixing the synthetic smectite subjected to organizing treatment and a curable resin to prepare a resin composition containing the synthetic smectite in an amount of 10 to 40 mass %; a third step of curing the resin composition to obtain a cured product; and a forth step of removing the organic volatile components remaining in the cured product. According to the method, a transparent composite material which is flexible and has a low coefficient of thermal expansion can be obtained which is reduced in outgassing at high temperature under vacuum as in vapor deposition of a conductive thin film.Type: GrantFiled: April 13, 2009Date of Patent: April 24, 2012Assignee: Showa Denko K.K.Inventors: Yasushi Kadowaki, Kenji Shimamura, Ryoji Toita
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Publication number: 20120034397Abstract: This invention relates to a transparent composite material having a low linear expansion coefficient and excellent transparency, flexibility and workability, which is formed by curing a resin composition containing epoxy(meth)acrylate synthesized from lactone modified (meth)acrylate, acid anhydride and epoxy resin, in which 10 to 55% by mass of synthetic smectite that is organized with a quaternary ammonium salt and/or a quaternary phosphonium salt and has a number average particle diameter of from 10 to 300 nm and an aspect ratio of from 10 to 300 is dispersed; and a transparent composite sheet using the material.Type: ApplicationFiled: March 26, 2010Publication date: February 9, 2012Applicant: SHOWA DENKO K.K.Inventors: Miyo Mukobayashi, Ryoji Toita
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Publication number: 20120022191Abstract: This invention relates to a transparent composite material having a low coefficient of liner thermal expansion and excellent transparency and flexibility, which is formed by curing a resin composition containing urethane (meth)acrylate, in which 10 to 40% by mass of synthetic smectite that is organized with a quaternary ammonium salt and/or a quaternary phosphonium salt and has a number average particle diameter of from 10 to 300 nm and an aspect ratio of from 10 to 300 is dispersed; and a transparent composite sheet using the material.Type: ApplicationFiled: March 26, 2010Publication date: January 26, 2012Applicant: SHOWA DENKO K.K.Inventors: Ryoji Toita, Miyo Mukobayashi
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Publication number: 20110040015Abstract: This invention relates to a method for producing a transparent composite material comprising a first step of subjecting a synthetic smectite having a number average particle diameter of from 10 to 300 nm and an aspect ratio of from 10 to 300 to organizing treatment with an organic quaternary ammonium salt and/or an organic quaternary phosphonium salt; a second step of mixing the synthetic smectite subjected to organizing treatment and a curable resin to prepare a resin composition containing the synthetic smectite in an amount of 10 to 40 mass %; a third step of curing the resin composition to obtain a cured product; and a forth step of removing the organic volatile components remaining in the cured product. According to the method, a transparent composite material which is flexible and has a low coefficient of thermal expansion can be obtained which is reduced in outgassing at high temperature under vacuum as in vapor deposition of a conductive thin film.Type: ApplicationFiled: April 13, 2009Publication date: February 17, 2011Applicant: SHOWA DENKO K.K.Inventors: Yasushi Kadowaki, Kenji Shimamura, Ryoji Toita
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Publication number: 20110039117Abstract: This invention relates to a method for producing a cured film, which comprises a first step of applying a curable resin composition onto a surface of a first substrate and a surface of a second substrate respectively; a second step of bonding the curable resin composition layers provided on each surface of the first and second substrates to each other; and a third step of curing the curable resin composition layer between the first and the second substrates. The present invention enables production of a cured film in which the amount of thermal deformation such as warpage upon heating/cooling is suppressed, and the film can be suitably used as a plastic substrate for a display such as a liquid crystal display device and an organic EL display device, a substrate for a display, such as a substrate for electronic paper and the like, and a substrate for a solar cell.Type: ApplicationFiled: April 13, 2009Publication date: February 17, 2011Applicant: SHOWA DENKO K.K.Inventors: Yasushi Kadowaki, Ryoji Toita, Kenji Shimamura
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Publication number: 20100292378Abstract: This invention relates to: (1) a transparent composite material comprising a cured product of a resin composition having from 60 to 90% by mass of a vinyl ester resin composition which has a vinyl ester resin being synthesized from an aliphatic epoxy compound and from 10 to 40% by mass of synthetic smectite that is organized with a quaternary ammonium salt and/or a quaternary phosphonium salt and has a number average particle diameter of from 10 to 300 nm and an aspect ratio of from 10 to 300, the composition being cured, (2) a method for producing the transparent composite material, wherein the raw material composition for the composite material before curing is cured with an electron beam (EB), an ultraviolet ray (UV) or heat, and (3) a display device and a substrate for a solar cell comprising the transparent composite material as a substrate.Type: ApplicationFiled: January 30, 2009Publication date: November 18, 2010Applicant: SHOWA DENKO K.K.Inventors: Ryoji Toita, Kenji Shimamura
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Publication number: 20090324922Abstract: The invention provides a transparent composite material comprising a cured product of a three-dimensionally crosslinkable resin composition containing tabular inorganic substance having a number-average particle size of 10 to 300 nm and an aspect ratio of 10 to 300 dispersed therein, which material has a small coefficient of thermal expansion against surrounding temperature changes and can be suitably applicable as substrate for display devices, to thereby overcome disadvantages in substrate for display devices using conventional materials that differences in thermal shrinkage between a substrate and an transparent electrode cause cracks in the transparent electrode, resulting in increasing resistance and causing disconnection, and further can provide a display device with high durability.Type: ApplicationFiled: July 20, 2007Publication date: December 31, 2009Applicant: SHOWA DENKO K.K.Inventors: Yasushi Kadowaki, Kazufumi Kai, Ryoji Toita