Patents by Inventor Seiko Ichikawa
Seiko Ichikawa 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: 9181479Abstract: A retardation element containing a liquid crystalline compound, and at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2) and a compound represented by the following formula (3). In the formula (1), n represents an integer of 3 to 10 and R2 represents a —CH2—CH2— group, a —CH2—CH(CH3)— group or a —CH2—CH2—CH2— group. In the formula (2), R3 represents a —(CH2)p— group or a phenylene group and p represents an integer of 4 to 8. In the formula (3), R4 represents a substituted phenylene group. In the formulas (1) to (3), R1-1, R1-2 and R1-3 each represent an alkyl group having a branched structure having 5 or more carbon atoms and R1-1, R1-2 and R1-3 may be the same or different.Type: GrantFiled: December 8, 2009Date of Patent: November 10, 2015Assignees: SEKISUI CHEMICAL CO., LTD., NIPPON KAYAKU KABUSHIKI KAISHA, POLATECHNO CO., LTDInventors: Juichi Fukatani, Izumi Omoto, Seiko Ichikawa, Kouichi Tanaka, Mayu Kameda
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Patent number: 9180648Abstract: A laminate for a laminated glass, comprising an interlayer film for a laminated glass laminated with a retardation element interposed between an adhesive layer A and an adhesive layer B, wherein the retardation element contains a liquid-crystal compound and at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), and a compound represented by the following formula (3). In formula (1), n represents an integer from 3 to 10 and R2 represents a —CH2—CH2— group, a —CH2—CH(CH3)— group, or a —CH2—CH2—CH2— group. In formula (2), R3 represents a —(CH2)p— group or a phenylene group and p represents an integer from 4 to 8. In formula (3), R4 represents a substituted phenylene group. R1-1, R1-2, and R1-3 in formulas (1) to (3) are the same or different, each representing an alkyl group that has a branched structure and that contains at least 5 carbon atoms.Type: GrantFiled: December 22, 2009Date of Patent: November 10, 2015Assignees: SEKISUI CHEMICAL CO., LTD., NIPPON KAYAKU KABUSHIKI KAISHA, POLATECHNO CO., LTD.Inventors: Juichi Fukatani, Izumi Omoto, Seiko Ichikawa, Kouichi Tanaka, Mayu Kameda
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Patent number: 8557394Abstract: A laminate for a laminated glass which is used as a head-up display (HUD) and is not deteriorated even if exposed to light, and with which a laminated glass having excellent impact resistance can be prepared, wherein an interlayer film for a laminated glass and a retardation element sandwiched between adhesive layers are laminated, the interlayer film for a laminated glass contains a thermoplastic resin and an ultraviolet absorber, the interlayer film for a laminated glass contains, as the ultraviolet absorber, a benzotriazole compound or a benzophenone compound, and at least one compound selected from the group consisting of a malonic ester compound, an oxanilide compound and a triazine compound.Type: GrantFiled: January 2, 2013Date of Patent: October 15, 2013Assignees: Sekisui Chemical Co., Ltd., Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.Inventors: Juichi Fukatani, Izumi Omoto, Seiko Ichikawa, Kouichi Tanaka, Mayu Kameda
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Patent number: 8367216Abstract: A laminate for a laminated glass which is used as a head-up displays (HUD) and is not deteriorated even if exposed to light, and with which a laminated glass having excellent impact resistance can be prepared, wherein an interlayer film for a laminated glass and a retardation element sandwiched between adhesive layers are laminated, the interlayer film for a laminated glass contains a thermoplastic resin and an ultraviolet absorber, the interlayer film for a laminated glass contains, as the ultraviolet absorber, a benzotriazole compound or a benzophenone compound, and at least one compound selected from the group consisting of a malonic ester compound, an oxanilide compound and a triazine compound.Type: GrantFiled: December 22, 2009Date of Patent: February 5, 2013Assignees: Sekisui Chemical Co., Ltd., Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.Inventors: Juichi Fukatani, Izumi Omoto, Seiko Ichikawa, Kouichi Tanaka, Mayu Kameda
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Publication number: 20120021230Abstract: The present invention aims to provide a laminate for a laminated glass which is used as a head-up display (HUD) and is not deteriorated even if exposed to light, and with which a laminated glass having excellent impact resistance can be prepared. The present invention pertains to a laminate for a laminated glass, wherein an interlayer film for a laminated glass and a retardation element sandwiched between adhesive layers are laminated, the interlayer film for a laminated glass contains a thermoplastic resin and an ultraviolet absorber, the interlayer film for a laminated glass contains, as the ultraviolet absorber, a benzotriazole compound or a benzophenone compound, and at least one compound selected from the group consisting of a malonic ester compound, an oxanilide compound and a triazine compound, the sum of the contents of the malonic ester compound, the oxanilide compound and the triazine compound is 0.Type: ApplicationFiled: December 22, 2009Publication date: January 26, 2012Inventors: Juichi Fukatani, Izumi Omoto, Seiko Ichikawa, Kouichi Tanaka, Mayu Kameda
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Publication number: 20110293856Abstract: The present invention aims at providing a retardation element which has excellent heat resistance, is small in the changes in the retardation value in an atmosphere of high temperatures, and is capable of maintaining stable optical performance. The present invention pertains to a retardation element containing a liquid crystalline compound, and at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2) and a compound represented by the following formula (3). In the formula (1), n represents an integer of 3 to 10 and R2 represents a —CH2—CH2— group, a —CH2—CH(CH3)— group or a —CH2—CH2—CH2— group. In the formula (2), R3 represents a —(CH2)p— group or a phenylene group and p represents an integer of 4 to 8. In the formula (3), R4 represents a substituted phenylene group.Type: ApplicationFiled: December 8, 2009Publication date: December 1, 2011Inventors: Juichi Fukatani, Izumi Omoto, Seiko Ichikawa, Kouichi Tanaka, Mayu Kameda
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Publication number: 20110293857Abstract: An object of the present invention is to provide a laminate for a laminated glass that exhibits an excellent heat resistance, exhibits little variation in its retardation value in high-temperature atmospheres, and can maintain stable optical properties. The present invention is a laminate for a laminated glass, comprising an interlayer film for a laminated glass laminated with a retardation element interposed between an adhesive layer A and an adhesive layer B, wherein the retardation element contains a liquid-crystal compound and at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), and a compound represented by the following formula (3). In formula (1), n represents an integer from 3 to 10 and R2 represents a —CH2—CH2— group, a —CH2—CH(CH3)— group, or a —CH2—CH2—CH2— group. In formula (2), R3 represents a —(CH2)p— group or a phenylene group and p represents an integer from 4 to 8.Type: ApplicationFiled: December 22, 2009Publication date: December 1, 2011Inventors: Juichi Fukatani, Izumi Omoto, Seiko Ichikawa, Kouichi Tanaka, Mayu Kameda
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Publication number: 20100247902Abstract: It is an object of the present invention to provide an interlayer film for a laminated glass not allowing visual identification of persons or objects behind the glass while transmitting a certain amount of visible light and having an excellent heat insulating property. The present invention is an interlayer film for a laminated glass, which comprises a polyvinyl acetal resin, a plasticizer, a dispersant, and titanium oxide particles, the titanium oxide particles being dispersed so as to have an average long diameter of 0.4 to 2 ?m and a dispersion density of 2.0×105 to 7.0×105 particles/cm2.Type: ApplicationFiled: September 12, 2008Publication date: September 30, 2010Applicant: Sekisui Chemical Co., Ltd.Inventors: Juichi Fukatani, Seiko Ichikawa