Patents by Inventor Masahiro Enna
Masahiro Enna 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: 10377889Abstract: A thermoplastic elastomer composition obtained by dynamically crosslinking an ethylene/?-olefin/non-conjugated polymer copolymer (A), a polyolefin resin (B), a softener (C) in an amount of 1 to 200 parts by mass per 100 parts by mass of the total of the copolymer (A) and the resin (B), and a crosslinking agent (D) by the use of a batch mixer under the conditions satisfying the requirements (1) to (4).Type: GrantFiled: March 23, 2016Date of Patent: August 13, 2019Assignee: MITSUI CHEMICALS, INC.Inventors: Hayato Kurita, Kazuyoshi Kaneko, Masahiro Enna, Tatsuya Enomoto, Hideki Mochizuki
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Publication number: 20180072880Abstract: A thermoplastic elastomer composition obtained by dynamically crosslinking an ethylene/?-olefin/non-conjugated polymer copolymer (A), a polyolefin resin (B), a softener (C) in an amount of 1 to 200 parts by mass per 100 parts by mass of the total of the copolymer (A) and the resin (B), and a crosslinking agent (D) by the use of a batch mixer under the conditions satisfying the requirements (1) to (4).Type: ApplicationFiled: March 23, 2016Publication date: March 15, 2018Applicant: MITSUI CHEMICALS, INC.Inventors: Hayato KURITA, Kazuyoshi KANEKO, Masahiro ENNA, Tatsuya ENOMOTO, Hideki MOCHIZUKI
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Publication number: 20170253709Abstract: This invention relates to a thermoplastic elastomer composition having a type A hardness (i.e., the momentary value) of 55 or less in accordance with JIS K6253, which comprises 35 to 65 parts by weight of an olefin-based thermoplastic elastomer (A) having a type A hardness (i.e., the momentary value) of 75 or less in accordance with JIS K6253 and 65 to 35 parts by weight of a styrene-based thermoplastic elastomer (B) having a type A hardness (i.e., the momentary value) of 60 or less in accordance with JIS K6253 (with the total amount of components (A) and (B) being 100 parts by weight) and a molded thermoplastic elastomer product obtained via molding of such composition.Type: ApplicationFiled: September 8, 2015Publication date: September 7, 2017Applicant: MITSUI CHEMICALS, INC.Inventors: Hayato KURITA, Masahiro ENNA
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Patent number: 8188191Abstract: The present invention is a polyolefin polymer containing vinyl groups at both ends thereof, and a composition and a molded product containing the polymer, wherein the polymer contains a constitutional unit derived from at least one selected from the group consisting of ethylene (a), an ?-olefin (b) having 3 to 20 carbon atoms, and a cyclic olefin (c), and (1) a ratio of terminal vinylation is 70% or more relative to all of both ends of molecular chains, and (2) an intrinsic viscosity [?] is in the range of 0.01 to 10 dl/g as measured in a decalin solution at 135° C. The polymer of the present invention may be molded by a LIM molding, an injection molding, a transfer molding, a compression molding, and the like, and is excellent in acid resistance, gas permeation resistance, hydrolysis resistance, and dynamic fatigue resistance. From the polymer, a thermoplastic resin composition and a crosslinkable resin composition, and a crosslinked composition having excellent mechanical characteristics are obtained.Type: GrantFiled: August 29, 2007Date of Patent: May 29, 2012Assignee: Mitsui Chemicals, Inc.Inventors: Shigenobu Ikenaga, Keiji Okada, Yoshiki Shimokawatoko, Akihiro Matsuda, Shigekazu Matsui, Masahiro Enna
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Publication number: 20120094134Abstract: [Subject] The present invention provides a poly-4-methyl-1-pentene resin composition having improved film strength and molding properties for various molded articles with maintaining release properties which are inherent in poly-4-methyl-1-pentene, and also provides molded articles formed from the resin composition. [Means for solving the subject] The subject is attained by the poly-4-methyl-1-pentene resin composition comprising 50 to 99 parts by weight of poly-4-methyl-1-pentene (A), 1 to 50 parts by weight of polyamide (B) and 0.1 to 30 parts by weight of modified poly-4-methyl-1-pentene (C) obtainable by graft modification with an ethylenic unsaturated bond-containing monomer, provided that the total amount of (A) and (B) is 100 parts by weight.Type: ApplicationFiled: October 18, 2011Publication date: April 19, 2012Applicant: MITSUI CHEMICALS. INC.Inventors: Masahiro ENNA, Kazutoshi Fujihara, Yasuhito Tsugane, Yoshiaki Aso, Ryoichi Seki
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Patent number: 7847021Abstract: A modified polyolefin resin comprising a copolymer having a structure that a propylene-based polyolefin segment (a) and a segment (b) containing a lactic acid as a constituent are bonded in a block state and/or a graft state through a vinyl monomer having a hydroxyl group, wherein a number average molecular weight of the propylene-based polyolefin segment (a) is from 1,000 to 100,000, a number average molecular weight of the segment (b) containing lactic acid as a constituent is from 1,000 to 200,000, and a weight composition of the propylene-based polyolefin segment (a) and the segment (b) containing lactic acid as a constituent is from 10/90 to 90/10. The modified polyolefin resin can be used in a resin composition containing an aliphatic polyester resin (A), a polyolefin resin (B) and the modified polyolefin resin (C). The composition can exhibit excellent heat resistance and impact resistance and can be used for molding various parts.Type: GrantFiled: February 9, 2005Date of Patent: December 7, 2010Assignee: Mitsui Chemicals, Inc.Inventors: Hosei Shinoda, Takeshi Kashima, Masahiro Enna, Shinichi Kojoh, Hideyuki Kaneko, Shingo Matsuo, Nobuo Kawahara, Tomoaki Matsugi, Yuichi Matsuda, Takayuki Onogi, Fumio Kageyama
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Patent number: 7776805Abstract: A copolymer containing a constituent unit derived from ethylene and a constituent unit derived from an ?-olefin having 3 to 20 carbon atoms and satisfying the following requirements (1) to (5): (1) the copolymer has a melting point (Tm) of ?20° C. to 100° C.; (2) the melting point (Tm) and the density D (g/cm3) satisfy the following expression Tm?1073×D?893 (1); (3) the copolymer has a molecular weight distribution (Mw/Mn) measured by GPC of 1.6 to 5.0; (4) the copolymer has a half-width (?Thalf) of a melting peak measured by DSC of 90° C. or less; and (5) the half-width (?Thalf) and the melting point (Tm) satisfy the relationship shown by the following expression ?Thalf??0.71×Tm+101.4??(2).Type: GrantFiled: October 19, 2007Date of Patent: August 17, 2010Assignee: Mitsui Chemicals, Inc.Inventors: Akihiro Matsuda, Nobuo Murase, Satoshi Ikeda, Masahiro Enna, Junichi Mohri
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Publication number: 20100004393Abstract: The present invention is a polyolefin polymer containing vinyl groups at both ends thereof, and a composition and a molded product containing the polymer, wherein the polymer contains a constitutional unit derived from at least one selected from the group consisting of ethylene (a), an ?-olefin (b) having 3 to 20 carbon atoms, and a cyclic olefin (c), and (1) a ratio of terminal vinylation is 70% or more relative to all of both ends of molecular chains, and (2) an intrinsic viscosity [?] is in the range of 0.01 to 10 dl/g as measured in a decalin solution at 135° C. The polymer of the present invention may be molded by a LIM molding, an injection molding, a transfer molding, a compression molding, and the like, and is excellent in acid resistance, gas permeation resistance, hydrolysis resistance, and dynamic fatigue resistance. From the polymer, a thermoplastic resin composition and a crosslinkable resin composition, and a crosslinked composition having excellent mechanical characteristics are obtained.Type: ApplicationFiled: August 29, 2007Publication date: January 7, 2010Inventors: Shigenobu Ikenaga, Keiji Okada, Yoshiki Shimokawatoko, Akihiro Matsuda, Shigekazu Matsui, Masahiro Enna
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Publication number: 20080125561Abstract: A copolymer containing a constituent unit derived from ethylene and a constituent unit derived from an ?-olefin having 3 to 20 carbon atoms and satisfying the following requirements (1) to (5): (1) the copolymer has a melting point (Tm) of ?20° C. to 100° C.; (2) the melting point (Tm) and the density D (g/cm3) satisfy the following expression Tm?1073×D?893 (1); (3) the copolymer has a molecular weight distribution (Mw/Mn) measured by GPC of 1.6 to 5.0; (4) the copolymer has a half-width (?Thalf) of a melting peak measured by DSC of 90° C. or less; and (5) the half-width (?Thalf) and the melting point (Tm) satisfy the relationship shown by the following expression ?Thalf??0.71×Tm+101.4.Type: ApplicationFiled: October 19, 2007Publication date: May 29, 2008Inventors: Akihiro Matsuda, Nobuo Murase, Satoshi Ikeda, Masahiro Enna, Junichi Mohri
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Patent number: 7307107Abstract: A photopolymerizable composition comprising a polymerizable compound and a photopolymerization initiator, wherein the polymerizable compound is characterized by comprising (a) a bifunctional (meth)acrylic acid (thio)ester compound containing a sulfur atom in the molecule and (b) at least one of a (meth)acrylic acid ester compound represented by the general formula (1) or a bifunctional (meth)acrylic acid ester compound having a urethane linkage: wherein R1 and R2 are each independently a hydrogen atom or a methyl group; R3 and R4 are each independently an alkyl group, an aralkyl group, an aryl group or a halogen atom; m and n are each an integer of 0 to 2; X1 is an alkylidene group having 1 to 3 carbon atoms; and Y1 and Y2 are each independently a poly(oxyalkylene) group with the proviso that at least one of Y1 and Y2 is a poly(oxyalkylene) group having a hydroxy group.Type: GrantFiled: July 17, 2003Date of Patent: December 11, 2007Assignee: Mitsui Chemicals, Inc.Inventors: Masao Imai, Mitsuo Nakamura, Hiroshi Naruse, Osamu Kohgo, Masahiro Enna, Atsuo Otsuji
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Publication number: 20070160861Abstract: A modified polyolefin resin comprising a copolymer having a structure that a propylene-based polyolefin segment (a) and a segment (b) containing a lactic acid as a constituent are bonded in a block state and/or a graft state through a vinyl monomer having a hydroxyl group, wherein a number average molecular weight of the propylene-based polyolefin segment (a) is from 1,000 to 100,000, a number average molecular weight of the segment (b) containing lactic acid as a constituent is from 1,000 to 200,000, and a weight composition of the propylene-based polyolefin segment (a) and the segment (b) containing lactic acid as a constituent is from 10/90 to 90/10. The modified polyolefin resin can be used in a resin composition containing an aliphatic polyester resin (A), a polyolefin resin (B) and the modified polyolefin resin (C). The composition can exhibit excellent heat resistance and impact resistance and can be used for molding various parts.Type: ApplicationFiled: February 9, 2005Publication date: July 12, 2007Applicant: Mitsui Chemicals, Inc.Inventors: Hosei Shinoda, Takeshi Kashima, Masahiro Enna, Shinichi Kojoh, Hideyuki Kaneko, Shingo Matsuo, Nobuo Kawahara, Tomoaki Matsugi, Yuichi Matsuda, Takayuki Onogi, Fumio Kageyama
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Publication number: 20060155085Abstract: A methacrylic resin monomer composition comprising at least one of each of the following (A) to (C): (A) a methyl methacrylate monomer and/or a syrup thereof; (B) a compound represented by the general formula (1); and (C) a radical initiator, wherein, in the formula, R1 and R3, and R2 and R4 represent hydrogen atoms or methyl groups at the same, respectively. The composition can provide a crosslinkable methacrylic resin which is improved in resin properties such as heat resistance, rigidity, low water absorption, chemical resistance and the like without deteriorating high transparency a PMMA originally has. A transparent member and an optical member composed of such a resin are also disclosed.Type: ApplicationFiled: June 9, 2004Publication date: July 13, 2006Applicant: MITSUI CHEMICALS, INC.Inventors: Osamu Kohgo, Noboru Kawasaki, Masahiro Enna
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Publication number: 20060003261Abstract: A photopolymerizable composition comprising a polymerizable compound and a photopolymerization initiator, wherein the polymerizable compound is characterized by comprising (a) a bifunctional (meth)acrylic acid (thio)ester compound containing a sulfur atom in the molecule and (b) at least one of a (meth)acrylic acid ester compound represented by the general formula (1) or a bifunctional (meth)acrylic acid ester compound having a urethane linkage: wherein R1 and R2 are each independently a hydrogen atom or a methyl group; R3 and R4 are each independently an alkyl group, an aralkyl group, an aryl group or a halogen atom; m and n are each an integer of 0 to 2; X1 is an alkylidene group having 1 to 3 carbon atoms; and Y1 and Y2 are each independently a poly(oxyalkylene) group with the proviso that at least one of Y1 and Y2 is a poly(oxyalkylene) group having a hydroxy group.Type: ApplicationFiled: July 17, 2003Publication date: January 5, 2006Applicant: Mitsui Chemicals, Inc.Inventors: Masao Imai, Mitsuo Nakamura, Hiroshi Naruse, Osamu Kohgo, Masahiro Enna, Atsuo Otsuji
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Publication number: 20030181612Abstract: A methacrylic resin produced by copolymerizing a composition in the presence of a radical initiator, the composition comprising methyl methacrylate and a specified compound. Further, there are provided transparent members including a transparent member for automobile and a transparent member for display, which are produced by molding the above methacrylic resin. A methacrylic resin which is excellent in transparency, heat resistance, chemical resistance and impact resistance can be produced with high productivity without the occurrence of runaway of polymerization reaction. The transparent members including a transparent member for automobile and a transparent member for display, produced by molding the above methacrylic resin, are excellent in properties such as transparency, heat resistance and impact resistance.Type: ApplicationFiled: January 17, 2003Publication date: September 25, 2003Inventors: Noboru Kawasaki, Katsuyoshi Sasagawa, Masahiro Enna
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Patent number: 6316677Abstract: A process for the production of a bisphenol compound comprising: a step for reacting a phenolic compound (a) with at least one compound (b) selected from the group consisting of dialkenylbenzene compounds, bis(hydroxyalkyl)benzene compounds and (hydroxyalkyl)-alkenylbenzene compounds or at least one compound (c) selected from the group consisting of monoalkenylphenolic compounds and mono(hydroxyalkyl)phenolic compounds in the presence of an acidic catalyst to obtain a reaction mixture containing said bisphenol compound, a step for neutralizing the reaction mixture with an anion exchange resin, a step for removing a remaining phenolic compound from the reaction mixture to concentrate the neutralized reaction mixture, and a step for isolating the bisphenol compound from the resulting concentrated mixture. This process enables to produce a bisphenol compound, which is useful for preparing raw materials of thermoplastic polymers, surface-active agents and stabilizers.Type: GrantFiled: March 16, 1999Date of Patent: November 13, 2001Assignee: Mitsui Chemicals, Inc.Inventors: Masahiro Enna, Naoshi Nagai, Toshiyuki Isaka