Patents by Inventor Shigenobu Ikenaga
Shigenobu Ikenaga 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: 11282975Abstract: A sheet set for encapsulating a solar battery including a first encapsulating sheet and a second encapsulating sheet which are disposed between a light-incident surface protective member and a back surface protective member, and are used to encapsulate solar battery elements is provided. When the first encapsulating sheet and the second encapsulating sheet are subjected to a heating and pressurization treatment in which the first encapsulating sheet and the second encapsulating sheet are heated and depressurized under defined conditions, a volume resistivity of the first encapsulating sheet measured under defined conditions, is higher than a volume resistivity of the second encapsulating sheet. The first encapsulating sheet is disposed between the light-incident surface protective member and the solar battery elements. The second encapsulating sheet has at least one polar group selected from a carboxyl group, an ester group, a hydroxyl group, an amino group, and an acetal group.Type: GrantFiled: February 22, 2013Date of Patent: March 22, 2022Assignee: MITSUI CHEMICALS TOHCELLO, INC.Inventors: Masaaki Odoi, Nobuhiro Maruko, Kazuhiro Yarimizu, Shigenobu Ikenaga, Kaoru Ohshimizu
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Publication number: 20180237620Abstract: A photo-crosslinkable ethylene-based resin composition of the present invention includes an ethylene-based copolymer having a Shore A hardness measured in accordance with ASTM D2240 of equal to or more than 55 and equal to or less than 95, a photo-crosslinking initiator, and a crosslinking aid, in which the content of the crosslinking aid is equal to or more than 0.1 parts by mass and less than 2.0 parts by mass with respect to 100 parts by mass of the ethylene-based copolymer.Type: ApplicationFiled: August 3, 2016Publication date: August 23, 2018Applicant: MITSUI CHEMICALS TOHCELLO, INC.Inventors: Takanobu MUROFUSHI, Jun TOKUHIRO, Shigenobu IKENAGA
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Patent number: 9865752Abstract: An encapsulating material for solar cell of the invention contains an ethylene/?-olefin copolymer, and a content of a fluorine element in the ethylene/?-olefin copolymer, which is determined using a combustion method and an ion chromatograph method, is equal to or less than 30 ppm.Type: GrantFiled: March 13, 2013Date of Patent: January 9, 2018Assignees: MITSUI CHEMICALS, INC., MITSUI CHEMICALS TOHCELLO, INC.Inventors: Shigenobu Ikenaga, Fumito Takeuchi, Tomoaki Ito
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Patent number: 9761747Abstract: The encapsulating material for solar cell is an encapsulating material for solar cell including an ethylene/?-olefin copolymer and an organic peroxide having a one-minute half-life temperature in a range of 100° C. to 170° C. In addition, the complex viscosity of the encapsulating material for solar cell has the minimum value (?*1) of the complex viscosity at a temperature in a range of 100° C. to lower than 135° C., the minimum value (?*1) of the complex viscosity is in a range of 6.0×103 Pa·s to 4.0×104 Pa·s, the complex viscosity (?*2) of the encapsulating material for solar cell at 150° C. is in a range of 2.0×104 Pa·s to 1.0×105 Pa·s, and the content of the organic peroxide in the encapsulating material for solar cell is in a range of 0.1 parts by weight to 3 parts by weight with respect to 100 parts by weight of the ethylene/?-olefin copolymer.Type: GrantFiled: November 18, 2013Date of Patent: September 12, 2017Assignee: MITSUI CHEMICALS TOHCELLO, INC.Inventors: Shigenobu Ikenaga, Fumito Takeuchi, Tomoaki Ito, Kazuhiro Yarimizu, Kaoru Ohshimizu, Masaaki Odoi
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Patent number: 9595630Abstract: An encapsulating material for solar cell containing an ethylene/?-olefin copolymer satisfying the following a1) and a2), and a specific peroxyketal having a 1-hour half-life temperature in a range of 100 to 135 degrees centigrade; the peroxyketal being contained in an amount of 0.1 to less than 0.8 weight parts relative to 100 weight parts of the ethylene/?-olefin copolymer. a1) the shore A hardness is from 60 to 85 as measured in accordance with ASTM D2240. a2) MFR is from 2 to 50 g/10 minutes as measured under the conditions of a temperature of 190 degrees centigrade and a load of 2.16 kg in accordance with ASTM D1238.Type: GrantFiled: August 16, 2012Date of Patent: March 14, 2017Assignee: MITSUI CHEMICALS TOHCELLO, INC.Inventors: Shigenobu Ikenaga, Fumito Takeuchi, Keiji Watanabe, Tomoaki Ito
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Patent number: 9543461Abstract: An encapsulating material for solar cell that is capable of suppressing the corrosion of metal and the occurrence of yellowing at a high temperature and has excellent long-term reliability in a constant temperature and humidity is provided. The encapsulating material for solar cell of the invention contains an ethylene/?-olefin copolymer, a hindered amine-based light stabilizer, a hindered phenol-based stabilizer, and a phosphorous-based stabilizer as essential components.Type: GrantFiled: February 7, 2013Date of Patent: January 10, 2017Assignee: MITSUI CHEMICALS, INC.Inventors: Shigenobu Ikenaga, Fumito Takeuchi, Tomoaki Ito
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Publication number: 20160280819Abstract: A catalyst for olefin polymerization, comprising: (A-1) a bridged metallocene compound represented by the following Formula [1-1], and (b) at least one compound selected from: (b-1) an organoaluminum oxy compound, (b-2) a compound which forms an ion pair, and (b-3) an organoaluminum compound: wherein in Formula [1-1], R1, R2, R3, R4, R5, R8, R9, and R12 are each selected from a hydrogen, a hydrocarbon group and a silicon-containing group; the four groups of R6, R7, R10, and R11 are not hydrogen atoms, and are each selected from a hydrocarbon group or a silicon-containing group; R13 and R14 are each a hydrocarbon group or the like, excluding a hydrogen atom and a methyl group; M is Ti, Zr or the like; Y is carbon or the like; Q is a halogen or the like; and j is an integer from 1 to 4.Type: ApplicationFiled: June 6, 2016Publication date: September 29, 2016Applicant: MITSUI CHEMICALS, INC.Inventors: Yasushi TOHI, Masahiko OKAMOTO, Ryoji MORI, Takashi NAKAGAWA, Shigenobu IKENAGA, Hiromasa MARUBAYASHI, Kouji NAGAHASHI, Shiro OTSUZUKI
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Publication number: 20160254402Abstract: Provided is a sheet set for encapsulating a solar cell which is disposed between a light-receiving surface side protective member and a back surface side protective member, and is used for encapsulating a solar cell element and a wiring material. The sheet set for encapsulating a solar cell includes a first encapsulating material sheet disposed on a light-receiving surface side and a second encapsulating material sheet disposed on a back surface side. A storage elastic modulus (P1) of the first encapsulating material sheet before a cross-linking treatment and a storage elastic modulus (P2) of the second encapsulating material sheet before the cross-linking treatment satisfy a relationship of the following Expression (1), at 120° C. when solid viscoelasticity is measured under conditions of a measurement temperature range of 25° C. to 180° C., a frequency of 1.0 Hz, a temperature rising rate of 10° C./minute, and a shear mode.Type: ApplicationFiled: October 8, 2014Publication date: September 1, 2016Applicant: MITSUI CHEMICALS TOHCELLO, INC.Inventors: Tomoaki ITO, Fumito TAKEUCHI, Shigenobu IKENAGA, Kazuhiro YARIMIZU, Kaoru OHSHIMIZU
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Patent number: 9349895Abstract: An encapsulating material for solar cell excellent in a balance among properties including transparency, flexibility, adhesiveness, heat resistance, appearance, crosslinking properties, electrical properties and calender moldability. The encapsulating material includes an ethylene/?-olefin copolymer satisfying the following requirements: (a1) the content ratio of structural units derived from ethylene is from 80 to 90 mol % and the content ratio of structural units derived from ?-olefin having 3 to 20 carbon atoms is from 10 to 20 mol %; (a2) MFR is equal to or more than 2 g/10 minutes and less than 10 g/10 minutes as measured under the conditions of a temperature of 190 degrees centigrade and a load of 2.16 kg in accordance with ASTM D1238; (a3) the density is from 0.865 to 0.884 g/cm3 as measured in accordance with ASTM D1505; and (a4) the shore A hardness is from 60 to 85 as measured in accordance with ASTM D2240.Type: GrantFiled: October 31, 2011Date of Patent: May 24, 2016Assignees: MITSUI CHEMICALS, INC., MITSUI CHEMICALS TOHCELLO, INC.Inventors: Shigenobu Ikenaga, Fumito Takeuchi, Keiji Watanabe, Tomoaki Ito
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Patent number: 9260556Abstract: An encapsulating material for solar cell of the invention contains an ethylene/?-olefin copolymer, an organic peroxide, at least one crosslinking aid selected from a group consisting of divinyl aromatic compounds, cyanurates, diallyl compounds, triallyl compounds, oximes and maleimides, and a (meth)acrylate-based monomer. The content of the (meth)acrylate-based monomer in the encapsulating material for solar cell is in a range of 0.1 parts by weight to 5.0 parts by weight with respect to 100 parts by weight of the ethylene/?-olefin copolymer, and the content of the crosslinking aid in the encapsulating material for solar cell is in a range of 0.1 parts by weight to 3 parts by weight with respect to 100 parts by weight of the ethylene/?-olefin copolymer.Type: GrantFiled: February 7, 2013Date of Patent: February 16, 2016Assignee: MITSUI CHEMICALS TOHCELLO, INC.Inventors: Shigenobu Ikenaga, Fumito Takeuchi, Tomoaki Ito
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Patent number: 9193854Abstract: An encapsulating material for solar cell is made of a resin composition containing a crosslinkable resin, and satisfies the following 1) and 2). 1) When the encapsulating material for solar cell is immersed in acetone at 23° C. for one hour after a crosslinking treatment in which the encapsulating material for solar cell is heated and depressurized at 150° C. and 250 Pa for three minutes, and then is heated and pressurized at 150° C. and 100 kPa for 15 minutes, an acetone-absorbing ratio is in a range of 3.5 weight % to 12.0 weight % with respect to the weight of the above-described crosslinking-treated encapsulating material for solar cell. 2) A volume resistivity of the above-described crosslinking-treated encapsulating material for solar cell, which is based on JIS K6911 and measured at a temperature of 100° C. with an applied voltage of 500 V, is in a range of 1.0×1013 ?·cm to 1.0×1018 ?·cm.Type: GrantFiled: December 26, 2012Date of Patent: November 24, 2015Assignee: MITSUI CHEMICALS TOHCELLO, INC.Inventors: Shigenobu Ikenaga, Fumito Takeuchi, Tomoaki Ito, Nobuhiro Maruko, Masaaki Odoi
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Publication number: 20150303340Abstract: The encapsulating material for solar cell is an encapsulating material for solar cell including an ethylene/?-olefin copolymer and an organic peroxide having a one-minute half-life temperature in a range of 100° C. to 170° C. In addition, the complex viscosity of the encapsulating material for solar cell has the minimum value (?*1) of the complex viscosity at a temperature in a range of 100° C. to lower than 135° C., the minimum value (?*1) of the complex viscosity is in a range of 6.0×103 Pa·s to 4.0×104 Pa·s, the complex viscosity (?2) of the encapsulating material for solar cell at 150° C. is in a range of 2.0×104 Pa·s to 1.0×105 Pa·s, and the content of the organic peroxide in the encapsulating material for solar cell is in a range of 0.1 parts by weight to 3 parts by weight with respect to 100 parts by weight of the ethylene/?-olefin copolymer.Type: ApplicationFiled: November 18, 2013Publication date: October 22, 2015Applicant: Mitsui Chemicals Tohcello, Inc.Inventors: Shigenobu IKENAGA, Fumito TAKEUCHI, Tomoaki ITO, Kazuhiro YARIMIZU, Kaoru OHSHIMIZU, Masaaki ODOI
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Publication number: 20150171247Abstract: A solar cell module (10) includes a light-incident surface protective member (14), a back surface protective member (15), solar cell elements (13), and an encapsulating layer (11) that encapsulates the solar cell elements (13) between the light-incident surface protective member (14) and the back surface protective member (15). The volume resistance per square centimeter at 85° C. between the light-incident surface protective member (14) and the solar cell element (13) is in a range of 1×1013 ?·cm2 to 1×1017 ?·cm2.Type: ApplicationFiled: March 14, 2013Publication date: June 18, 2015Applicant: MITSUI CHEMICALS TOHCELLO, INC.Inventors: Nobuhiro Maruko, Masaaki Odoi, Kazuhiro Yarimizu, Shigenobu Ikenaga
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Patent number: 9040811Abstract: A solar-cell sealant that has excellent properties such as transparency, flexibility, adhesiveness, heat resistance, appearance, cross-linking characteristics, electrical characteristics, and calenderability. A solar-cell sealant that contains an ethylene/?-olefin/unconjugated-polyene copolymer satisfying requirements (a1) through (a3). Requirement (a1) is that constituent units derived from ethylene constitute 80-90 mol %, constituent units derived from C3-20 ?-olefin constitute 9.99-19.99 mol %, and constituent units derived from an unconjugated polyene constitute 0.01-5.0 mol % of said copolymer. Requirement (a2) is that the MFR of said copolymer, as measured in accordance with ASTM D1238 at 190° C. under a 2.16 kg load, be at least 2 g/10 min. and less than 10 g/10 min. Requirement (a3) is that the Shore A hardness of said copolymer, as measured in accordance with ASTM D2240, be 60 to 85.Type: GrantFiled: November 17, 2011Date of Patent: May 26, 2015Assignee: Mitsui Chemicals Tohcello, Inc.Inventors: Shigenobu Ikenaga, Fumito Takeuchi, Keiji Watanabe, Tomoaki Ito
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Publication number: 20150075616Abstract: An encapsulating material for solar cell of the invention contains an ethylene/?-olefin copolymer, and a content of a fluorine element in the ethylene/?-olefin copolymer, which is determined using a combustion method and an ion chromatograph method, is equal to or less than 30 ppm.Type: ApplicationFiled: March 13, 2013Publication date: March 19, 2015Inventors: Shigenobu Ikenaga, Fumito Takeuchi, Tomoaki Ito
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Patent number: 8945701Abstract: An ethylene resin composition is provided which has excellent properties including adhesion properties, electrically insulating properties, transparency, moldability and process stability and can be produced without requiring any cross-linking procedure if necessary to improve productivity; and others. The ethylene resin composition contains a modified product produced by modifying an ethylene polymer (A) that meets all of the requirements a) to e) mentioned below with an ethylenically unsaturated silane compound (B). a) The density is 900 to 940 kg/m3. b) The melting peak temperature is 90 to 125 ° C. as determined by DSC. c) The melt flow rate (MFR2) is 0.1 to 100 g/10 minutes as measured at 190 ° C. and a load of 2.16 kg in accordance with JIS K-6721. d) The Mw/Mn ratio is 1.2 to 3.5. e) The content of metal residues is 0.1 to 50 ppm.Type: GrantFiled: May 31, 2010Date of Patent: February 3, 2015Assignee: Mitsui Chemicals Tohcello, Inc.Inventors: Shigenobu Ikenaga, Takashi Hakuta, Kazuhiro Yarimizu, Hiroshi Mori, Takanobu Murofushi, Hirofumi Zenkoh, Jun Tokuhiro, Fumito Takeuchi
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Publication number: 20150013755Abstract: An encapsulating material for solar cell of the invention contains an ethylene/?-olefin copolymer, an organic peroxide, at least one crosslinking aid selected from a group consisting of divinyl aromatic compounds, cyanurates, diallyl compounds, triallyl compounds, oximes and maleimides, and a (meth)acrylate-based monomer. The content of the (meth)acrylate-based monomer in the encapsulating material for solar cell is in a range of 0.1 parts by weight to 5.0 parts by weight with respect to 100 parts by weight of the ethylene/?-olefin copolymer, and the content of the crosslinking aid in the encapsulating material for solar cell is in a range of 0.1 parts by weight to 3 parts by weight with respect to 100 parts by weight of the ethylene/?-olefin copolymer.Type: ApplicationFiled: February 7, 2013Publication date: January 15, 2015Applicant: MITSUI CHEMICALS TOHCELLO, INC.Inventors: Shigenobu Ikenaga, Fumito Takeuchi, Tomoaki Ito
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Publication number: 20150013768Abstract: A sheet set for encapsulating a solar battery including a first encapsulating sheet and a second encapsulating sheet which are disposed between a light-incident surface protective member and a back surface protective member, and are used to encapsulate solar battery elements is provided. When the first encapsulating sheet and the second encapsulating sheet are subjected to a heating and pressurization treatment in which the first encapsulating sheet and the second encapsulating sheet are heated and depressurized under defined conditions, a volume resistivity of the first encapsulating sheet measured under defined conditions, is higher than a volume resistivity of the second encapsulating sheet. The first encapsulating sheet is disposed between the light-incident surface protective member and the solar battery elements. The second encapsulating sheet has at least one polar group selected from a carboxyl group, an ester group, a hydroxyl group, an amino group, and an acetal group.Type: ApplicationFiled: February 22, 2013Publication date: January 15, 2015Inventors: Masaaki Odoi, Nobuhiro Maruko, Kazuhiro Yarimizu, Shigenobu Ikenaga, Kaoru Ohshimizu
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Publication number: 20150007883Abstract: An encapsulating material for solar cell that is capable of suppressing the corrosion of metal and the occurrence of yellowing at a high temperature and has excellent long-term reliability in a constant temperature and humidity is provided. The encapsulating material for solar cell of the invention contains an ethylene/?-olefin copolymer, a hindered amine-based light stabilizer, a hindered phenol-based stabilizer, and a phosphorous-based stabilizer as essential components.Type: ApplicationFiled: February 7, 2013Publication date: January 8, 2015Inventors: Shigenobu Ikenaga, Fumito Takeuchi, Tomoaki Ito
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Publication number: 20150000739Abstract: An encapsulating material for solar cell is made of a resin composition containing a crosslinkable resin, and satisfies the following 1) and 2). 1) When the encapsulating material for solar cell is immersed in acetone at 23° C. for one hour after a crosslinking treatment in which the encapsulating material for solar cell is heated and depressurized at 150° C. and 250 Pa for three minutes, and then is heated and pressurized at 150° C. and 100 kPa for 15 minutes, an acetone-absorbing ratio is in a range of 3.5 weight % to 12.0 weight % with respect to the weight of the above-described crosslinking-treated encapsulating material for solar cell. 2) A volume resistivity of the above-described crosslinking-treated encapsulating material for solar cell, which is based on JIS K6911 and measured at a temperature of 100° C. with an applied voltage of 500 V, is in a range of 1.0×1013 ?·cm to 1.0×1018 ?·cm.Type: ApplicationFiled: December 26, 2012Publication date: January 1, 2015Inventors: Shigenobu Ikenaga, Fumito Takeuchi, Tomoaki Ito, Nobuhiro Maruko, Masaaki Odoi