Patents by Inventor Seiji Ota
Seiji Ota 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: 8563138Abstract: Provided is a polypropylene-based adhesive having an MFR of 2.7 g/10 min or higher, as measured at 230 ° C. under a load of 2.16 kg, comprising a composition which contains 5-95 parts by weight of (A) an isotactic polypropylene, 95-5 parts by weight of (B) a propylene/ethylene random copolymer, and 0-40 parts by weight of (C) an ethylene/propylene random copolymer, wherein 100 parts by weight of the composition is graft modified with 0.001-5 parts by weight of an unsaturated carboxylic acid and/or a derivative thereof, and wherein (B) is characterized by the following (i) to (iii): (i) the propylene/ethylene random copolymer (B) contains 60-90 mol % units derived from propylene and 10-40 mol % units derived from ethylene; (ii) the melting point (Tm) is in the range of 40-120 ° C.; and (iii) the molecular weight distribution (Mw/Mn) is in the range of 1.0-3.0.Type: GrantFiled: January 24, 2007Date of Patent: October 22, 2013Assignee: Mitsui Chemicals Inc.Inventors: Shigeyuki Yasui, Seiji Ota, Takashi Sakuma
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Patent number: 8182925Abstract: It is an object of the invention to provide a carbodiimide modified polyolefin adhesive having excellent adhesive strength in a room temperature atmosphere and excellent adhesive strength in a high temperature atmosphere even in continuously molding with a practical molding machine. An adhesive (D), i.e., a carbodiimide modified polyolefin adhesive of the present invention which can solve the above problem is obtainable by allowing a polyolefin (A) having a group capable of reacting with a carbodiimide group to react with a carbodiimide group-containing compound (B) in the presence of an unmodified polyolefin (C) and having a ratio of a peak intensity at 2130 to 2140 cm?1 to a peak intensity at 1470 cm?1, as determined by infrared absorbance analysis, of not more than 60% and a density of 0.870 g/cm3 to 0.920 g/cm3.Type: GrantFiled: October 5, 2006Date of Patent: May 22, 2012Assignee: Mitsui Chemicals, Inc.Inventors: Shigeyuki Yasui, Akihide Mori, Seiji Ota
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Patent number: 8106122Abstract: A propylene-based polymer composition for adhesive use and a laminate structure thereof are provided, wherein decrease of bonding strength is prevented when the laminate structure is formed and heat treatment is applied and whitening in bending process is suppressed. Provided are a propylene-based polymer composition (D) for adhesive use comprising (i) 40 to 92 wt % of a graft-modified polypropylene (A); (ii) 5 to 30 wt % of an ethylene.?-olefin copolymer (B) having a melt flow rate (MFR) of 0.01 to 10 g/10 min at 230° C. under a load of 2.16 kg and a density of 0.940 g/cm3 or less; and (iii) 3 to 30 wt % of a block copolymer (C) composed of an olefin crystalline segment and an ethylene.?-olefin segment, wherein the sum of (A), (B) and (C) is 100 wt %, and a laminate comprising at least one layer of the propylene-based polymer composition for adhesive use.Type: GrantFiled: March 24, 2006Date of Patent: January 31, 2012Assignee: Mitsui Chemicals, Inc.Inventors: Hideki Mochizuki, Shigeyuki Yasui, Seiji Ota
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Patent number: 8106132Abstract: There is provided by the present invention a polyester resin composition containing a copolyester having hydroxy carboxylic acid units as constituent units or a polyoxycarboxylic acid, wherein hydroxy carboxylic acid units of 5 or less carbon atoms are contained in amounts of 2 to 75% by mol based on 100% by mol of all the constituent units contained in the composition, and a molar ratio SAA of hydroxy carboxylic acid units both of whose neighboring units are hydroxy carboxylic acid units to all the hydroxy carboxylic acid units contained and a molar ratio SBB of hydroxy carboxylic acid units neither of whose neighboring units is a hydroxy carboxylic acid unit to all the hydroxy carboxylic acid units contained satisfy the following formula: 0.03<SAA/SBB<30.Type: GrantFiled: January 8, 2004Date of Patent: January 31, 2012Assignee: Mitsui Chemicals, Inc.Inventors: Junji Tan, Yasuhiro Mutou, Seiji Ota
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Patent number: 7754813Abstract: A resin modifier (C) obtained by reacting a polyolefin (A) having a group which reacts with a carbodiimide group, and a carbodiimide group-containing compound (B), wherein the content of the carbodiimide group is from 1 to 200 mmol per 100 g of the resin modifier, and a polar group-containing polymer composition (F) comprising from 1 to 30% by weight of the resin modifier (C), from 99 to 20% by weight of a polar group-containing polymer (D), and from 0 to 80% by weight of an olefin polymer (E). The modifier can provide improved low-temperature impact resistance of a polymer alloy including a polar group-containing polymer and an olefin polymer (such as polylactic acid and polypropylene), and can provide a molded article with smooth surface when the polymer alloy is molded. A polar group-containing polymer composition is also set forth.Type: GrantFiled: March 10, 2005Date of Patent: July 13, 2010Assignee: Mitsui Chemicals, Inc.Inventors: Shuichi Murakami, Seiji Ota, Junji Tan
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Publication number: 20100173168Abstract: An object of the present invention is to provide polypropylene adhesive excellent in both initial adhesion and adhesion after heat history; and a laminate excellent in adhesion and heat resistance. Provided is a polypropylene-based adhesive having an MFR of 2.7 g/10 min or higher as measured at 230° C. under a load of 2.16 kg, comprising a composition which contains 5-95 parts by weight of (A) an isotactic polypropylene, 95-5 parts by weight of (B) a propylene/ethylene random copolymer, and 0-40 parts by weight of (C) an ethylene/propylene random copolymer, wherein 100 parts by weight of the composition is graft modified with 0.Type: ApplicationFiled: January 24, 2007Publication date: July 8, 2010Inventors: Shigeyuki Yasui, Seiji Ota, Takashi Sakuma
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Patent number: 7714087Abstract: A polar group-containing olefin copolymer having excellent adhesion properties to metals or polar resins and excellent compatibility therewith, a process for preparing the copolymer, a thermoplastic resin composition containing the copolymer, and uses thereof. The polar group-containing olefin copolymer comprises a constituent unit derived from an ?-olefin of 2 to 20 carbon atoms, and a constituent unit derived from a straight-chain, branched or cyclic polar group-containing monomer having at the end a polar group such as a hydroxyl group or an epoxy group and/or a constituent unit derived from a macromonomer having at the end a polymer segment obtained by anionic polymerization, ring-opening polymerization or polycondensation. The polar group-containing olefin copolymer can be prepared by polymerizing the ?-olefin with the polar group-containing monomer and/or the macromonomer in the presence of a metallocene catalyst.Type: GrantFiled: May 12, 2008Date of Patent: May 11, 2010Assignee: Mitsui Chemicals, Inc.Inventors: Junichi Imuta, Norio Kashiwa, Seiji Ota, Satoru Moriya, Tadahito Nobori, Kazumi Mizutani
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Publication number: 20090280318Abstract: Provided is a new adhesive polyolefin resin composition, containing 1 to 100% by weight of a high polymer structure, that has good heat resistance and excellent adhesion performance to polyolefins and various polar materials, wherein a polyolefin segment (A) is bonded with an addition polymer segment (B) of a non-olefinic vinyl monomer and a reactive group is introduced into the addition polymer segment (B) and an adhesive or dispersion obtained therefrom.Type: ApplicationFiled: December 8, 2006Publication date: November 12, 2009Applicant: MITSUI CHEMICALS, INC.Inventors: Tomoaki Matsugi, Junji Saito, Hideyuki Kaneko, Norio Kashiwa, Shin-ichi Kojoh, Takayuki Onogi, Motoaki Isokawa, Seiji Ota, Shigeyuki Yasui
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Publication number: 20090275700Abstract: A propylene-based polymer composition for adhesive use and a laminate structure thereof are provided, wherein decrease of bonding strength is prevented when the laminate structure is formed and heat treatment is applied and whitening in bending process is suppressed. Provided are a propylene-based polymer composition (D) for adhesive use comprising (i) 40 to 92 wt % of a graft-modified polypropylene (A); (ii) 5 to 30 wt % of an ethylene.?-olefin copolymer (B) having a melt flow rate (MFR) of 0.01 to 10 g/10 min at 230° C. under a load of 2.16 kg and a density of 0.940 g/cm3 or less; and (iii) 3 to 30 wt % of a block copolymer (C) composed of an olefin crystalline segment and an ethylene.?-olefin segment, wherein the sum of (A), (B) and (C) is 100 wt %, and a laminate comprising at least one layer of the propylene-based polymer composition for adhesive use.Type: ApplicationFiled: March 24, 2006Publication date: November 5, 2009Inventors: Hideki Mochizuki, Shigeyuki Yasui, Seiji Ota
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Publication number: 20090136774Abstract: The present invention is to provide a resin composition excellent in mechanical properties and solvent resistance, and the resin composition (C) of the present invention comprises an polyolefin (A1) and an olefinic block polymer (A2), wherein the olefinic block polymer (A2) comprises, as a constitutional unit, a block (a) which is a polyolefin component and a block (b) which is a polymer unit composed of a vinyl monomer having a solubility parameter of from 18 to 25 J/m and the block (a) and the block (b) are bonded each other by a covalent bond. Moreover, another invention of the present invention is to provide a laminated structure having a laminated configuration in which a layer comprising an olefinic polymer layer and a layer comprising other synthetic resins, a metal and the like are strongly bonded through an adhesive layer, wherein the adhesive layer comprises the resin composition (C).Type: ApplicationFiled: March 28, 2007Publication date: May 28, 2009Inventors: Takayuki Onogi, Hideyuki Kaneko, Tomoaki Matsugi, Koutarou Suzuki, Nobou Kawahara, Seiji Ota, Shigeyuki Yasui
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Publication number: 20090137757Abstract: A polar group-containing olefin copolymer having excellent adhesion properties to metals or polar resins and excellent compatibility therewith, a process for preparing the copolymer, a thermoplastic resin composition containing the copolymer, and uses thereof. The polar group-containing olefin copolymer comprises a constituent unit derived from an ?-olefin of 2 to 20 carbon atoms, and a constituent unit derived from a straight-chain, branched or cyclic polar group-containing monomer having at the end a polar group such as a hydroxyl group or an epoxy group and/or a constituent unit derived from a macromonomer having at the end a polymer segment obtained by anionic polymerization, ring-opening polymerization or polycondensation. The polar group-containing olefin copolymer can be prepared by polymerizing the ?-olefin with the polar group-containing monomer and/or the macromonomer in the presence of a metallocene catalyst.Type: ApplicationFiled: May 12, 2008Publication date: May 28, 2009Inventors: Junichi Imuta, Norio Kashiwa, Seiji Ota, Satoru Moriya, Tadahito Nobori, Kazumi Mizutani
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Publication number: 20090110945Abstract: It is an object of the invention to provide a carbodiimide modified polyolefin adhesive having excellent adhesive strength in a room temperature atmosphere and excellent adhesive strength in a high temperature atmosphere even in continuously molding with a practical molding machine. An adhesive (D), i.e., a carbodiimide modified polyolefin adhesive of the present invention which can solve the above problem is obtainable by allowing a polyolefin (A) having a group capable of reacting with a carbodiimide group to react with a carbodiimide group-containing compound (B) in the presence of an unmodified polyolefin (C) and having a ratio of a peak intensity at 2130 to 2140 cm?1 to a peak intensity at 1470 cm?1, as determined by infrared absorbance analysis, of not more than 60% and a density of 0.870 g/cm3 to 0.920 g/cm3.Type: ApplicationFiled: October 5, 2006Publication date: April 30, 2009Inventors: Shigeyuki Yasui, Akihide Mori, Seiji Ota
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Patent number: 7393907Abstract: The present invention is a polar group-containing olefin copolymer having excellent adhesion properties to metals or polar resins and excellent compatibility therewith. A process for preparing the copolymer, a thermoplastic resin composition containing the copolymer, and uses thereof are also described. The polar group-containing olefin copolymer comprises a constituent unit derived from an ?-olefin of 2 to 20 carbon atoms, and a constituent unit derived from a straight-chain, branched or cyclic polar group-containing monomer having at the end a polar group such as a hydroxyl group or an epoxy group and/or a constituent unit derived from a macromonomer having at the end a polymer segment obtained by anionic polymerization, ring-opening polymerization or polycondensation.Type: GrantFiled: November 17, 2003Date of Patent: July 1, 2008Assignee: Mitsui Chemicals, Inc.Inventors: Junichi Imuta, Norio Kashiwa, Seiji Ota, Satoru Moriya, Tadahito Nobori, Kazumi Mizutani
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Patent number: 7317055Abstract: An adhesive resin for a liquid crystal polymer, comprising a modified polyolefin (D) prepared by graft polymerizing at least one epoxy group-containing ethylenically unsaturated monomer (B) to a polyolefin (A) obtained by polymerizing one or more olefins selected from ethylene and ?-olefin having from 3 to 20 carbon atoms, in an amount in the range of from 0.01 to 50% by weight, with the proviso that the modified polyolefin is 100% by weight. The modified polyolefin (D) can be combined with a thermoplastic resin (E) to form an adhesive resin composition.Type: GrantFiled: March 14, 2003Date of Patent: January 8, 2008Assignee: Mitsui Chemicals, Inc.Inventors: Seiji Ota, Kazuo Toyota
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Publication number: 20070173603Abstract: An object to be solved Disclosed is a novel resin modifier which enables to improve the low-temperature impact resistance of a polymer alloy including a polar group-containing polymer and an olefin polymer and enables to obtain a molded article with smooth surface when the polymer alloy is molded. Also disclosed is a polar group-containing polymer composition including the resin modifier. The polar group-containing polymer composition which is suitable in the invention is a resin composition of a polylactic acid and a polypropylene.Type: ApplicationFiled: March 10, 2005Publication date: July 26, 2007Applicant: Mitsui Chemicals, Inc.Inventors: Shuichi Murakami, Seiji Ota, Junji Tan
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Patent number: 7160949Abstract: Olefin block copolymers (A-1) are disclosed represented by the formula (I) PO1-g1-B1 . . . (I) wherein PO1 is a segment comprised of repeating units derived from an olefin having 2 to 20 carbon atoms, g1 is an ester, ether, amide, imide, urethane, urea, silylether or carbonyl linkage, and B1 is a segment containing an unsaturated hydrocarbon or a hetero atom. The olefin block copolymers are suitable for uses in adhesives, various molded articles such as construction and civil engineering materials, automobile interior and exterior materials, gasoline tanks, electric and electronic parts, medical care and sanitation materials, materials of miscellaneous goods, resin materials having environmental degradation properties, films and sheets, modifiers and dispersions.Type: GrantFiled: January 18, 2001Date of Patent: January 9, 2007Assignee: Mitsui Chemicals, Inc.Inventors: Seiji Ota, Satoru Moriya, Ryoji Mori, Taku Koda, Junji Tan, Shinichi Kojoh, Hideyuki Kaneko, Shunichi Hama, Tadahito Nobori, Tomoaki Matsugi, Norio Kashiwa
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Patent number: 7153587Abstract: The present invention provides a polyester resin which comprises (a-1) 45 to 99% by mole of an oxycarboxylic acid unit having 5 carbon atoms or less, (a-2) 0.5 to 27.5% by mole of an aromatic dicarboxylic acid unit, and (a-3) 0.5 to 27.5% by mole of an aliphatic diol unit having 4 carbon atoms or less, and containing (a-1) to (a-3) in a total amount of 95% by mole or greater, wherein the relationship between the content of the oxycarboxylic acid, expressed as M % by mole, and the density ? (kg/m3) of the polyester resin, satisfies the formula ??1349+M×0.85.Type: GrantFiled: May 31, 2004Date of Patent: December 26, 2006Assignee: Mitsui Chemicals, Inc.Inventors: Junji Tan, Yasuhiro Mutou, Seiji Ota, Toyoaki Sasaki
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Publication number: 20060217523Abstract: There is provided by the present invention a polyester resin composition containing a copolyester having hydroxy carboxylic acid units as constituent units or a polyoxycarboxylic acid, wherein hydroxy carboxylic acid units of 5 or less carbon atoms are contained in amounts of 2 to 75% by mol based on 100% by mol of all the constituent units contained in the composition, and a molar ratio SAA of hydroxy carboxylic acid units both of whose neighboring units are hydroxy carboxylic acid units to all the hydroxy carboxylic acid units contained and a molar ratio SBB of hydroxy carboxylic acid units neither of whose neighboring units is a hydroxy carboxylic acid unit to all the hydroxy carboxylic acid units contained satisfy the following formula: 0.Type: ApplicationFiled: January 8, 2004Publication date: September 28, 2006Applicant: Mitsui Chemical, Inc.Inventors: Junji Tan, Yasuhiro Mutou, Seiji Ota
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Publication number: 20060204771Abstract: The present invention provides a polyester resin which comprises (a-1) 45 to 99% by mole of an oxycarboxylic acid unit having 5 carbon atoms or less, (a-2) 0.5 to 27.5% by mole of an aromatic dicarboxylic acid unit, and (a-3) 0.5 to 27.5% by mole of an aliphatic diol unit having 4 carbon atoms or less, and containing (a-1) to (a-3) in a total amount of 95% by mole or greater, wherein the relationship between the content of the oxycarboxylic acid, expressed as M % by mole, and the density ? (kg/m3) of the polyester resin, satisfies the formula ??1349+M×0.85.Type: ApplicationFiled: May 31, 2004Publication date: September 14, 2006Inventors: Junji Tan, Yasuhiro Mutou, Seiji Ota, Toyoaki Sasaki
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Publication number: 20050142303Abstract: An adhesive resin for a liquid crystal polymer, comprising a modified polyolefin (D) prepared by graft polymerizing at least one epoxy group-containing ethylenically unsaturated monomer (B) to a polyolefin (A) obtained by polymerizing one or more olefins selected from ethylene and ?-olefin having from 3 to 20 carbon atoms, in an amount in the range of from 0.01 to 50% by weight, with the proviso that the modified polyolefin is 100% by weight. The modified polyolefin (D) can be combined with a thermoplastic resin (E) to form an adhesive resin composition.Type: ApplicationFiled: March 14, 2003Publication date: June 30, 2005Applicant: Mitsui Chemicals IncInventors: Seiji Ota, Kazuo Toyota