Patents by Inventor Hayato Kurita
Hayato Kurita 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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Publication number: 20230071200Abstract: One embodiment of the present invention relates to a thermoplastic elastomer composition or a shaped article thereof. The thermoplastic elastomer composition is a composition including 100 parts by mass of an ethylene/?-olefin/non-conjugated polyene copolymer (A); 20 to 80 parts by mass of a propylene polymer (B) having a melt flow rate (measured at 230° C. under 2.16 kg load in accordance with ASTM D 1238-65T) of 1 to 100 g/10 min; and 0.1 to 50 parts by mass of an inorganic filler (C); or is a composition obtained by dynamically crosslinking 100 parts by mass of an ethylene/?-olefin/non-conjugated polyene copolymer (A); 20 to 80 parts by mass of the propylene polymer (B); 0.1 to 50 parts by mass of an inorganic filler (C); and a crosslinking agent (D).Type: ApplicationFiled: March 30, 2021Publication date: March 9, 2023Applicant: MITSUI CHEMICALS, INC.Inventors: Nana TATEMATSU, Hayato KURITA
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Publication number: 20220332927Abstract: A display device that includes a display element including a light source, and a surface film disposed so as to overlap with the display element and including a thermoplastic elastomer composition, the thermoplastic elastomer composition satisfying conditions (1) and (2) below, and the surface film satisfying conditions (3) and (4) below: (1) The melt flow rate (ASTM D1238, 230° C., 2.16 kg load; MFR) is not less than 30 g/10 min. (2) The type A hardness (momentary value) measured by a method in accordance with JIS K6253 is 60 to 90. (3) The thickness is not less than 300 ?m and not more than 2 mm. (4) The total light transmittance measured by a method in accordance with JIS K7361 is 3 to 60%.Type: ApplicationFiled: September 14, 2020Publication date: October 20, 2022Applicant: MITSUI CHEMICALS, INC.Inventors: Hayato KURITA, Kan KOMIYA
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Publication number: 20210230415Abstract: The present invention relates to a composition containing 20 to 60 parts by mass of a component derived from an ethylene-based copolymer rubber (A), 5 to 30 parts by mass of a component derived from a polypropylene resin (B), 4 to 14 parts by mass of a component derived from a styrene-based thermoplastic elastomer (C) and 5 to 70 parts by mass of a component derived from a softening agent (D) (with the total amount of the components (A), (B), (C) and (D) being 100 parts by mass), wherein a mass ratio of the component derived from the styrene-based thermoplastic elastomer (C) to the component derived from the softening agent (D) ((C)/(D)) is 0.01 to 1; a skin member of an automobile interior part, the skin member comprising the composition; and an automobile interior parts having the skin member.Type: ApplicationFiled: September 25, 2018Publication date: July 29, 2021Applicant: MITSUI CHEMICALS, INC.Inventors: Nana TAKAYAMA, Hayato KURITA, Tomohiro YAMAGUCHI, Yusuke YODA
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Publication number: 20190264014Abstract: A thermoplastic elastomer composition including: a crystalline olefin resin (A) having a melting point of 100° C. or more; an olefin resin (B) satisfying requirements (B-1) to (B-3); and an ethylene/?-olefin copolymer (C), the weight ratio of (A)/((B)+(C)) is from 70/30 to 30/70, and the weight ratio of (B)/(C) is from 100/0 to 1/99: (B-1) the resin (B) has a main chain of an ethylene copolymer and a side chain of an ethylene polymer or a propylene polymer, the ethylene copolymer includes repeating units derived from ethylene and repeating units derived from at least one ?-olefin having 3 to 20 carbon atoms, and the repeating units derived from the ?-olefin contained within the range of 10 to 50 mol % to the total repeating units in the main chain; (B-2) the melting point measured by DSC rom 60° C. to 170° C.; and (B-3) Tg measured by DSC from ?80° C. to ?30° C.Type: ApplicationFiled: June 8, 2017Publication date: August 29, 2019Applicant: MITSUI CHEMICALS, INC.Inventors: Masatoshi SASAKI, Hayato KURITA, Tomoaki MATSUGI, Yasushi YANAGIMOTO, Tatsuya NAKAMURA
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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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Patent number: 10280293Abstract: Provided is a thermoplastic elastomer composition with which it is possible to obtain a molded article having exceptional low-temperature impact resistance. A thermoplastic elastomer composition is produced that contains a crystalline olefin polymer (A) and an ethylene-?-olefin (C4-20)-unconjugated polyene copolymer (B) that satisfies requirements (1) and (2). (1) The B value represented by the equation: ([EX]+2[Y])/(2×[E]×([X]+[Y])) is 1.20 or higher. [E], [X] and [Y] respectively indicate the molar fraction of structural units derived from ethylene, the molar fraction of structural units derived from C4-20 ?-olefin and the molar fraction of structural units derived from unconjugated polyene, and [EX] indicates the diad chain fraction of structural units derived from ethylene-structural units derived from C4-20 ?-olefin. (2) The molar ratio of structural units derived from ethylene with respect to structural units derived from ?-olefin (C4-20) of copolymer (B) is 40/60-90/10.Type: GrantFiled: March 17, 2016Date of Patent: May 7, 2019Assignee: MITSUI CHEMICALS, INC.Inventors: Hayato Kurita, Mizuki Wakana, Takahiro Kondo, Hideki Mochizuki, Yuji Noguchi, Tatsuya Sakai
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Publication number: 20180086904Abstract: Provided is a thermoplastic elastomer composition with which it is possible to obtain a molded article having exceptional low-temperature impact resistance. A thermoplastic elastomer composition is produced that contains a crystalline olefin polymer (A) and an ethylene-?-olefin (C4-20)—unconjugated polyene copolymer (B) that satisfies requirements (1) and (2). (1) The B value represented by the equation: ([EX]+2[Y])/(2×[E]×([X]+[Y])) is 1.20 or higher. [E], [X] and [Y] respectively indicate the molar fraction of structural units derived from ethylene, the molar fraction of structural units derived from C4-20 ?-olefin and the molar fraction of structural units derived from unconjugated polyene, and [EX] indicates the diad chain fraction of structural units derived from ethylene-structural units derived from C4-20 ?-olefin. (2) The molar ratio of structural units derived from ethylene with respect to structural units derived from ?-olefin (C4-20) of copolymer (B) is 40/60-90/10.Type: ApplicationFiled: March 17, 2016Publication date: March 29, 2018Applicant: MITSUI CHEMICALS, INC.Inventors: Hayato Kurita, Mizuki Wakana, Takahiro Kondo, Hideki Mochizuki, Yuji Noguchi, Tatsuya Sakai
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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: 8329821Abstract: [Problem] To provide a thermoplastic elastomer composition for foaming, which has sufficient foamability and provides a molded article having good appearance. [Solution to Problem] A thermoplastic elastomer composition for foaming, which comprises 10 to 40% by weight of a partially or completely crosslinked ethylene/?-olefin/non-conjugated polyene copolymer rubber (A) comprising ethylene, an ?-olefin of 3 to 20 carbon atoms and a non-conjugated polyene, 3 to 33% by weight of an ethylene/?-olefin copolymer (B) comprising ethylene and an ?-olefin of 3 to 20 carbon atoms, 10 to 40% by weight of polypropylene (C) having a melting point, as determined by differential scanning calorimetry (DSC), of 40 to 170° C.Type: GrantFiled: July 14, 2009Date of Patent: December 11, 2012Assignee: Mitsui Chemicals, Inc.Inventors: Hayato Kurita, Toru Takehara, Masakazu Jitsukata, Yuichi Ito
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Patent number: 8008401Abstract: A polyolefin composition comprising an olefin-based thermoplastic elastomer which is superior to conventional olefin-based thermoplastic elastomers in scratch resistance and abrasion resistance and has excellent heat aging resistance is proposed. [Means for Solving the Problem] A polyolefin composition comprising a syndiotactic ?-olefin-based copolymer (A), a polyolefin resin (B) (other than polybutene (C)), polybutene (C), and if necessary, an ethylene-based copolymer rubber (D).Type: GrantFiled: September 10, 2007Date of Patent: August 30, 2011Assignee: Mitsui Chemicals, Inc.Inventors: Yuichi Ito, Kazuki Mita, Ryoji Mori, Masahiko Okamoto, Toru Takehara, Masakazu Jitsukata, Hayato Kurita
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Publication number: 20110117358Abstract: [Problem] To provide a thermoplastic elastomer composition for foaming, which has sufficient foamability and provides a molded article having good appearance. [Solution to Problem] A thermoplastic elastomer composition for foaming, which comprises 10 to 40% by weight of a partially or completely crosslinked ethylene/?-olefin/non-conjugated polyene copolymer rubber (A) comprising ethylene, an ?-olefin of 3 to 20 carbon atoms and a non-conjugated polyene, 3 to 33% by weight of an ethylene/?-olefin copolymer (B) comprising ethylene and an ?-olefin of 3 to 20 carbon atoms, 10 to 40% by weight of polypropylene (C) having a melting point, as determined by differential scanning calorimetry (DSC), of 40 to 170° C.Type: ApplicationFiled: July 14, 2009Publication date: May 19, 2011Inventor: Hayato KURITA
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Publication number: 20100093901Abstract: The present invention provides a polyacetal resin composition having excellent processability and stability, significantly suppressing the amount of formaldehyde generated from the molded article thereof, and preventing the bleeding of blending components. Specifically, to 100 parts by weight of (A) a polyacetal copolymer in which the amount of hemiformal terminal group is 1.0 mmol/kg or less, the amount of formyl terminal group is 0.5 mmol/kg or less, and the amount of unstable terminal group is 0.5% by weight or less, there are added: 0.01 to 3 parts by weight of (B) a hindered phenol-based antioxidant; 0.01 to 1 part by weight of (C) a hydrazide compound; and 0.01 to 1 part by weight of a compound selected from (D) an isocyanate compound, an isothiocyanate compound, and a modified compound thereof.Type: ApplicationFiled: December 7, 2007Publication date: April 15, 2010Inventors: Kuniaki Kawaguchi, Hiroyuki Hase, Hayato Kurita, Hiraku Iketani
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Publication number: 20100004401Abstract: [Problem] A polyolefin composition comprising an olefin-based thermoplastic elastomer which is superior to conventional olefin-based thermoplastic elastomers in scratch resistance and abrasion resistance and has excellent heat aging resistance is proposed. [Means for Solving the Problem] A polyolefin composition comprising a syndiotactic ?-olefin-based copolymer (A), a polyolefin resin (B) (other than polybutene (C)), polybutene (C), and if necessary, an ethylene-based copolymer rubber (D).Type: ApplicationFiled: September 10, 2007Publication date: January 7, 2010Applicant: MITSUI CHEMICALS, INC.Inventors: Yuichi Ito, Kazuki Mita, Ryoji Mori, Masahiko Okamoto, Toru Takehara, Masakazu Jitsukata, Hayato Kurita
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Publication number: 20090234050Abstract: Provided is a polyoxymethylene resin composition which has excellent molding characteristics (releasing property and molding cycle) and suppresses the generation of formaldehyde. Specifically the polyoxymethylene resin composition is prepared by blending (A) 100 parts by weight of a polyacetal copolymer containing 1 mmol/kg or less of hemiformal terminal, mmol/kg or less of formyl terminal, and 0.5% by weight or less of unstable terminal; (B) 0.01 to 20 parts by weight of one or a mixture of two or more of a guanamine compound (b-1) and a hydrazide compound (b-2); and (C) 0.1 to 5 parts by weight of an ester compound having 50% or more of esterification percentage.Type: ApplicationFiled: August 9, 2006Publication date: September 17, 2009Inventors: Shogo Wada, Hayato Kurita
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Patent number: 7186766Abstract: About 0.001 to 1 part by weight of a phenol component (B1) and/or about 0.001 to 10 parts by weight of an amino acid (B2) are added relative to 100 parts by weight of a polyacetal resin (A) to prepare a polyacetal resin composition. The phenol component (B1) may be a novolak phenol-series resin, a phenol aralkyl-series resin, a polyvinyl phenol-series resin, a polyhydric phenol, a polyphenol, a catechin compound, or a lignin. The amino acid (B2) may be an ?-amino acid, a ?-amino acid, a ?-amino acid, a ?-amino acid, or a derivative of an amino acid. The polyacetal resin composition may further contain an antioxidant, a heat stabilizer, a processing stabilizer, a weather (light)-resistant stabilizer, or a coloring agent. The polyacetal resin composition ensures marked inhibition of formaldehyde emission.Type: GrantFiled: July 1, 2003Date of Patent: March 6, 2007Assignee: Polyplastics Co., Ltd.Inventors: Hatsuhiko Harashina, Hayato Kurita
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Patent number: 7183340Abstract: About 0.001 to 5 parts by weight of an antioxidant and about 0.001 to 10 parts by weight of a guanamine compound having at least one unit represented by the following formula (1) or a salt thereof relative to 100 parts by weight of a polyacetal resin are mixed and constitute a resin composition. The resin composition may further comprise a processing stabilizer, a heat stabilizer, a weather-resistant stabilizer, a coloring agent, a gloss control agent, an impact resistance improver, a slide improver, a filler, and/or the like. Wherein R1 and R2 are the same or different and each represents a hydrogen atom or an alkyl group, and “m” denotes an integer of not less than 2.Type: GrantFiled: December 24, 2003Date of Patent: February 27, 2007Assignee: Polyplastics Co., Ltd.Inventors: Hatsuhiko Harashina, Hayato Kurita
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Patent number: 7041718Abstract: The polyacetal resin composition contains about 0.01–10 parts by weight of a glyoxyldiureide compound per 100 parts by weight of polyacetal resin. The glyoxyldiureide compound includes glyoxyldiureide and its derivatives (metal salts etc.). Optionally, about 0.01–10 parts by weight of a basic nitrogen-containing compound is further added. The basic nitrogen-containing compound includes melamine, melamine resin, and polyamide resin. Further, an antioxidant may be further added. The above composition contributes to stability, particularly heat stability, of polyacetal resin and suppression of emission of formaldehyde.Type: GrantFiled: September 5, 2003Date of Patent: May 9, 2006Assignee: Polyplastics Co., Ltd.Inventors: Hatsuhiko Harashina, Hayato Kurita, Tatsuya Yamada
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Publication number: 20060052492Abstract: About 0.001 to 5 parts by weight of an antioxidant and about 0.001 to 10 parts by weight of a guanamine compound having at least one unit represented by the following formula (1) or a salt thereof relative to 100 parts by weight of a polyacetal resin are mixed and constitute a resin composition. The resin composition may further comprise a processing stabilizer, a heat stabilizer, a weather-resistant stabilizer, a coloring agent, a gloss control agent, an impact resistance improver, a slide improver, a filler, and/or the like. Wherein R1 and R2 are the same or different and each represents a hydrogen atom or an alkyl group, and “m” denotes an integer of not less than 2.Type: ApplicationFiled: December 24, 2003Publication date: March 9, 2006Inventors: Hatsuhiko Harashina, Hayato Kurita
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Publication number: 20050075429Abstract: The polyacetal resin composition contains about 0.01-10 parts by weight of a glyoxyldiureide compound per 100 parts by weight of polyacetal resin. The glyoxyldiureide compound includes glyoxyldiureide and its derivatives (metal salts etc.). Optionally, about 0.01-10 parts by weight of a basic nitrogen-containing compound is further added. The basic nitrogen-containing compound includes melamine, melamine resin, and polyamide resin. Further, an antioxidant may be further added. The above composition contributes to stability, particularly heat stability, of polyacetal resin and suppression of emission of formaldehyde.Type: ApplicationFiled: September 5, 2003Publication date: April 7, 2005Applicant: Polyplastics Co. Ltd.Inventors: Hatsuhiko Harashina, Hayato Kurita, Tatsuya Yamada