Patents by Inventor Yukihito Zanka
Yukihito Zanka 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: 8211978Abstract: A moldability modifier capable of improving molding processability, and a polypropylene resin composition using the same suitable for automobile exterior parts are provided. The invention relates to a moldability modifier comprising propylene block copolymer (A) containing from 80 to 98 wt % of a propylene homopolymer portion (A1) and from 2 to 20 wt % of a propylene/ethylene random copolymer portion (A2), wherein the MFR of (A1) is 300 g/10 min or more, the ethylene content of (A2) is from 10 to 70 wt %, the [?] of (A2) is 6.5 dl/g or more, and the MFR as a whole is 40 g/10 min or more; and propylene block copolymer (B) containing from 20 to 79 wt % of a propylene polymer portion (B1) and from 21 to 80 wt % of a propylene/ethylene random copolymer portion (B2), wherein the MFR of (B1) is 20 g/10 min or more, the ethylene content of (B2) is from 20 to 70 wt %, the [?] of (B2) is from 2.5 to 9.0 dl/g, and the MFR as a whole is from 0.1 to 50 g/10 min; and a polypropylene resin composition using the same.Type: GrantFiled: March 23, 2007Date of Patent: July 3, 2012Assignee: Japan Polypropylene CorporationInventors: Yukihito Zanka, Yuji Ryosho, Ken Shimizu, Masashi Shimouse, Shigeo Mizukami
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Patent number: 8158706Abstract: A polypropylene resin composition contains 2 to 15 wt % of a moldability improver (A) and 85 to 98 wt % of a polypropylene resin (B). The moldability improver (A) is formed of propylene block copolymers (A-1) and (A-2). Each of the propylene block copolymers (A-1) and (A-2) has a crystalline propylene polymer component (A-11), (A-21) and a propylene-ethylene random copolymer component (A-12), (A-22). The propylene block copolymer (A-1) is characterized in that the melt flow rate of the crystalline propylene polymer component (A-11) is high, whereas the propylene block copolymer (A-2) is characterized in that the content ratio of the propylene-ethylene random copolymer component (A-22) is high. The polypropylene resin (B) is formed of a propylene-ethylene block copolymer (B-1), at least one of an ethylene elastomer and a styrene elastomer (B-2) and an inorganic filler (B-3).Type: GrantFiled: February 4, 2011Date of Patent: April 17, 2012Assignee: Nissan Motor Co., Ltd.Inventors: Masashi Shimouse, Yukihito Zanka, Takayuki Sato, Mineyuki Saotome, Sinichi Takaragi
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Publication number: 20110220851Abstract: A method of dispersing nanotubes and/or nanoplatelets in a polyolefin is provided, involving A) preparing a solution comprising nanotubes or nanoplatelets or both; B) stirring the resulting solution from step (A); C) dissolving at least one polymeric material in the stirred solution from step (B) and isolating precipitates from the solution; and D) melt-blending the precipitates with at least one polyolefin, along with the nanocomposites prepared thereby, and articles formed from the nanocomposites.Type: ApplicationFiled: December 28, 2010Publication date: September 15, 2011Applicants: JAPAN POLYPROPYLENE CORPORATION, TEXAS ENGINEERING EXPERIMENTAL STATIONInventors: Hung-Jue SUE, Minhao WONG, Chien-Chia CHU, Yukihito ZANKA, Yuuji RYOUSHO
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Publication number: 20110127696Abstract: A polypropylene resin composition contains 2 to 15 wt % of a moldability improver (A) and 85 to 98 wt % of a polypropylene resin (B). The moldability improver (A) is formed of propylene block copolymers (A-1) and (A-2). Each of the propylene block copolymers (A-1) and (A-2) has a crystalline propylene polymer component (A-11), (A-21) and a propylene-ethylene random copolymer component (A-12), (A-22). The propylene block copolymer (A-1) is characterized in that the melt flow rate of the crystalline propylene polymer component (A-11) is high, whereas the propylene block copolymer (A-2) is characterized in that the content ratio of the propylene-ethylene random copolymer component (A-22) is high. The polypropylene resin (B) is formed of a propylene-ethylene block copolymer (B-1), at least one of an ethylene elastomer and a styrene elastomer (B-2) and an inorganic filler (B-3).Type: ApplicationFiled: February 4, 2011Publication date: June 2, 2011Inventors: Masashi Shimouse, Yukihito Zanka, Takayuki Sato, Mineyuki Saotome, Sinichi Takaragi
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Patent number: 7923501Abstract: A polypropylene resin composition contains 2 to 15 wt % of a moldability improver (A) and 85 to 98 wt % of a polypropylene resin (B). The moldability improver (A) is formed of propylene block copolymers (A-1) and (A-2). Each of the propylene block copolymers (A-1) and (A-2) has a crystalline propylene polymer component (A-11), (A-21) and a propylene-ethylene random copolymer component (A-12), (A-22). The propylene block copolymer (A-1) is characterized in that the melt flow rate of the crystalline propylene polymer component (A-11) is high, whereas the propylene block copolymer (A-2) is characterized in that the content ratio of the propylene-ethylene random copolymer component (A-22) is high. The polypropylene resin (B) is formed of a propylene-ethylene block copolymer (B-1), at least one of an ethylene elastomer and a styrene elastomer (B-2) and an inorganic filler (B-3).Type: GrantFiled: December 19, 2007Date of Patent: April 12, 2011Assignee: Nissan Motor Co., Ltd.Inventors: Masashi Shimouse, Yukihito Zanka, Takayuki Sato, Mineyuki Saotome, Sinichi Takaragi
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Polypropylene block copolymer, uses thereof, and polypropylene resin composition containing the same
Patent number: 7847010Abstract: Provided are a molding appearance modifier for resins capable of controlling appearance of large-sized molded parts only by small addition, and a polypropylene resin composition capable of providing good appearance to, for example, automobile exterior parts, and has excellent molding processability. The invention relates to a propylene block copolymer having a crystalline propylene polymer portion and a propylene•ethylene random copolymer portion, wherein the crystalline propylene polymer portion has an intrinsic viscosity [?]homo of 1.2 dl/g or less; the propylene•ethylene random copolymer portion has an ethylene content of 30 to 70 wt. %, has an intrinsic viscosity [?]copoly of 2.5 to 7.0 dl/g, and is added in an amount of 40 to 80 wt. % based on the whole propylene block copolymer; and the propylene block copolymer, in its entirety, has a melt flow rate of 0.1 to 10 g/10 min; and a [?]copoly/[?]homo ratio falls within a range of 2.Type: GrantFiled: January 12, 2006Date of Patent: December 7, 2010Assignee: Japan Polypropylene CorporationInventors: Akihiro Suzuki, Shigeo Mizukami, Yukihito Zanka -
Patent number: 7659356Abstract: A polypropylene type aqueous dispersion comprising the following components (a) to (c): (a) a polypropylene type polymer 100 parts by weight and/or a modified polypropylene type polymer (b) a surfactant 1 to 100 parts by weight, and (c) water 100 to 1,000 parts by weight, wherein the component (a) has a main chain having the following features (1) and (2) and dispersion particles in the dispersion have an average particle size of at most 0.5 ?m, Feature (1) when observing a peak derived from a carbon atom of a methyl group in a propylene unit chain part comprising a head-to-tail bond by 13C-NMR and fixing a chemical shift of a peak top at a peak attributable to pentad expressed by mmmm to 21.8 ppm, a ratio (S1/S) of an area S1 of a peak of a peak top at 21.8 ppm to a total area S of peaks at from 19.8 ppm to 22.1 ppm is at least 10% and at most 60%, and when an area of a peak (mmmr) of a peak top at 21.5 to 21.Type: GrantFiled: August 4, 2008Date of Patent: February 9, 2010Assignee: Mitsubishi Chemical CorporationInventors: Teruaki Ashihara, Masato Onoe, Kazuyuki Hata, Fumihiko Shimizu, Naomasa Sato, Yukihito Zanka, Kouichi Nakayama
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Publication number: 20090292060Abstract: Provided are a molding appearance modifier for resins capable of controlling appearance of large-sized molded parts only by small addition, and a polypropylene resin composition capable of providing good appearance to, for example, automobile exterior parts, and has excellent molding processability. The invention relates to a propylene block copolymer having a crystalline propylene polymer portion and a propylene•ethylene random copolymer portion, wherein the crystalline propylene polymer portion has an intrinsic viscosity [?]homo of 1.2 dl/g or less; the propylene•ethylene random copolymer portion has an ethylene content of 30 to 70 wt. %, has an intrinsic viscosity [?]copoly of 2.5 to 7.0 dl/g, and is added in an amount of 40 to 80 wt. % based on the whole propylene block copolymer; and the propylene block copolymer, in its entirety, has a melt flow rate of 0.1 to 10 g/10 min; and a [?]copoly/[?]homo ratio falls within a range of 2.Type: ApplicationFiled: January 12, 2006Publication date: November 26, 2009Applicant: JAPAN POLYPROPYLENE CORPORATIONInventors: Akihiro Suzuki, Shigeo Mizukami, Yukihito Zanka
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Patent number: 7582696Abstract: A polypropylene-based resin composition of drastically improved dimensional stability realized by incorporating a polypropylene resin of specific structure with an inorganic filler of specific particle size, carbon fibers of specific fiber diameter and length, and, as required, an ethylene- and/or styrene-based elastomer. Another polypropylene-based resin composition of well-balanced properties of rigidity, heat-resistance, impact resistance and lightness even essentially in the absence of inorganic filler, realized by compositing a propylene/ethylene block copolymer of specific structure and well-balanced mechanical properties with an ethylene- and/or styrene-based elastomer, and carbon fibers of specific structure.Type: GrantFiled: December 21, 2004Date of Patent: September 1, 2009Assignee: Japan Polypropylene CorporationInventors: Kouichi Nakayama, Yukihito Zanka
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Publication number: 20090131576Abstract: A moldability modifier capable of improving molding processability, and a polypropylene resin composition using the same suitable for automobile exterior parts are provided. The invention relates to a moldability modifier comprising propylene block copolymer (A) containing from 80 to 98 wt % of a propylene homopolymer portion (A1) and from 2 to 20 wt % of a propylene/ethylene random copolymer portion (A2), wherein the MFR of (A1) is 300 g/10 min or more, the ethylene content of (A2) is from 10 to 70 wt %, the [?] of (A2) is 6.5 dl/g or more, and the MFR as a whole is 40 g/10 min or more; and propylene block copolymer (B) containing from 20 to 79 wt % of a propylene polymer portion (B1) and from 21 to 80 wt % of a propylene/ethylene random copolymer portion (B2), wherein the MFR of (B1) is 20 g/10 min or more, the ethylene content of (B2) is from 20 to 70 wt %, the [?] of (B2) is from 2.5 to 9.0 dl/g, and the MFR as a whole is from 0.1 to 50 g/10 min; and a polypropylene resin composition using the same.Type: ApplicationFiled: March 23, 2007Publication date: May 21, 2009Applicant: JAPAN POLYPROPYLENE CORPORATIONInventors: Yukihito Zanka, Yuji Ryosho, Ken Shimizu, Masashi Shimouse, Shigeo Mizukami
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Publication number: 20090018251Abstract: A polypropylene type aqueous dispersion comprising the following components (a) to (c): (a) a polypropylene type polymer 100 parts by weight and/or a modified polypropylene type polymer (b) a surfactant 1 to 100 parts by weight, and (c) water 100 to 1,000 parts by weight, wherein the component (a) has a main chain having the following features (1) and (2) and dispersion particles in the dispersion have an average particle size of at most 0.5 ?m, Feature (1) when observing a peak derived from a carbon atom of a methyl group in a propylene unit chain part comprising a head-to-tail bond by 13C-NMR and fixing a chemical shift of a peak top at a peak attributable to pentad expressed by mmmm to 21.8 ppm, a ratio (S1/S) of an area S1 of a peak of a peak top at 21.8 ppm to a total area S of peaks at from 19.8 ppm to 22.1 ppm is at least 10% and at most 60%, and when an area of a peak (mmmr) of a peak top at 21.5 to 21.Type: ApplicationFiled: August 4, 2008Publication date: January 15, 2009Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Teruaki ASHIHARA, Masato ONOE, Kazuyuki HATA, Fumihiko SHIMIZU, Naomasa SATO, Yukihito ZANKA, Kouichi NAKAYAMA
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Publication number: 20080161474Abstract: A polypropylene resin composition contains 2 to 15 wt % of a moldability improver (A) and 85 to 98 wt % of a polypropylene resin (B). The moldability improver (A) is formed of propylene block copolymers (A-1) and (A-2). Each of the propylene block copolymers (A-1) and (A-2) has a crystalline propylene polymer component (A-11), (A-21) and a propylene-ethylene random copolymer component (A-12), (A-22). The propylene block copolymer (A-1) is characterized in that the melt flow rate of the crystalline propylene polymer component (A-11) is high, whereas the propylene block copolymer (A-2) is characterized in that the content ratio of the propylene-ethylene random copolymer component (A-22) is high. The polypropylene resin (B) is formed of a propylene-ethylene block copolymer (B-1), at least one of an ethylene elastomer and a styrene elastomer (B-2) and an inorganic filler (B-3).Type: ApplicationFiled: December 19, 2007Publication date: July 3, 2008Inventors: Masashi SHIMOUSE, Yukihito Zanka, Takayuki Sato, Mineyuki Saotome, Sinichi Takaragi
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Publication number: 20070260004Abstract: The invention is to provide a talc-containing polypropylene resin composition by an in-line compounding, capable of solving a drawback where a reduced compression level for avoiding white spots caused by insufficient dispersion of inorganic filler increases the amount of involved air, thus detrimentally affecting the productivity particularly in case of a large-scale kneader, and a producing method therefor; namely a polypropylene resin composition including (A) a degassed-compressed talc which has a bulk specific gravity of from 0.3 to 1.0 and a compression rate of from 3.1 to 7.0, which is obtained by degassing and compressing talc having an average particle size of from 0.1 to 12 ?m and a bulk specific gravity of from 0.1 to 0.5, and which contains a component of 1,000 ?m or larger, when sieved by a ro-tap method, in a content of 15 wt % or less, and (B) a polypropylene resin, and a producing method therefor.Type: ApplicationFiled: September 7, 2005Publication date: November 8, 2007Applicant: JAPAN POLYPROPYLENE CORPORATIONInventors: Yukihito Zanka, Izumi Ishii, Kenji Matsuoka
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Moldability modifier for polypropylene resin and polypropylene resin composition containing the same
Patent number: 7064160Abstract: The invention provides a polypropylene based resin composition, which has good moldability on injection molding and which is excellent in its flow mark appearance as well as weld appearance on molding, and suitable for injection-molded articles such as exterior parts of automobiles, and also provides a moldability modifier used for the composition. The invention is a moldability modifier for a polypropylene based resin, which comprises at least one of a propylene homopolymer and a propylene random polymer having die swell ratio of 1.5 to 2.5 and ratio (Q value: Mw/Mn) of 7 to 13 of the weight average molecular weight (Mw) to the number average molecular weight (Mn) measured by gel permeation chromatography (GPC). The moldability modifier is mixed with a propylene-ethylene block copolymer, an ethylenic or styrenic elastomer, an inorganic filler, etc. to prepare a polypropylene based resin composition.Type: GrantFiled: November 8, 2001Date of Patent: June 20, 2006Assignee: Japan Polychem CorporationInventors: Yukihito Zanka, Mitsuhiro Murayama, Yoshiharu Yamamoto -
Publication number: 20050143510Abstract: A polypropylene-based resin composition of drastically improved dimensional stability realized by incorporating a polypropylene resin of specific structure with an inorganic filler of specific particle size, carbon fibers of specific fiber diameter and length, and, as required, an ethylene- and/or styrene-based elastomer. Another polypropylene-based resin composition of well-balanced properties of rigidity, heat-resistance, impact resistance and lightness even essentially in the absence of inorganic filler, realized by compositing a propylene/ethylene block copolymer of specific structure and well-balanced mechanical properties with an ethylene- and/or styrene-based elastomer, and carbon fibers of specific structure.Type: ApplicationFiled: December 21, 2004Publication date: June 30, 2005Applicant: JAPAN POLYPROPYLENE CORPORATIONInventors: Kouichi Nakayama, Yukihito Zanka
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Publication number: 20050124753Abstract: A polypropylene type aqueous dispersion comprising the following components (a) to (c): (a) a polypropylene type polymer 100 parts by weight and/or a modified polypropylene type polymer (b) a surfactant 1 to 100 parts by weight, and (c) water 100 to 1,000 parts by weight, wherein the component (a) has a main chain having the following features (1) and (2) and dispersion particles in the dispersion have an average particle size of at most 0.5 ?m, Feature (1) when observing a peak derived from a carbon atom of a methyl group in a propylene unit chain part comprising a head-to-tail bond by 13C-NMR and fixing a chemical shift of a peak top at a peak attributable to pentad expressed by mmmm to 21.8 ppm, a ratio (S1/S) of an area S1 of a peak of a peak top at 21.8 ppm to a total area S of peaks at from 19.8 ppm to 22.1 ppm is at least 10% and at most 60%, and when an area of a peak (mmmr) of a peak top at 21.5 to 21.Type: ApplicationFiled: October 26, 2004Publication date: June 9, 2005Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Teruaki Ashihara, Masato Onoe, Kazuyuki Hata, Fumihiko Shimizu, Naomasa Sato, Yukihito Zanka, Kouichi Nakayama
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Patent number: 6730728Abstract: The present invention provides a resin composition high in melting flow, exhibiting good properties, excellent in moldability and shrinkage properties, and hence suitable for automobile exteriors, by including (A) propylene/ethylene block copolymer having a melt flow rate (MFR) of 100 to 200 g/10 min., its propylene homopolymer component having an MFR of 210 to 400 g/10 min. and isotactic pentad fraction of 0.98 or more, and its copolymer portion containing propylene at 65 to 85% by weight; 50 to 70% by weight, (B) ethylene/octene and/or ethylene/butene random copolymer; 10 to 25% by weight, (C) styrene-based hydrogenated block copolymer rubber; 4 to 9% by weight and (D) talc; 16 to 24% by weight.Type: GrantFiled: January 11, 2002Date of Patent: May 4, 2004Assignees: Japan Polychem Corporation, Toyota Jidosha Kabushiki KaishaInventors: Masatoshi Matsuda, Hisayuki Iwai, Takayuki Nagai, Yukihito Zanka, Mitsuhiro Murayama, Yuji Fujita, Hironari Sano
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Moldability modifier for polypropylene resin and polypropylene resin composition containing the same
Publication number: 20040014871Abstract: The invention provides a polypropylene based resin composition, which has good moldability on injection molding and which is excellent in its flow mark appearance as well as weld appearance on molding, and suitable for injection-molded articles such as exterior parts of automobiles, and also provides a moldability modifier used for the composition.Type: ApplicationFiled: May 9, 2003Publication date: January 22, 2004Inventors: Yukihito Zanka, Mitsuhiro Murayama, Yoshiharu Yamamoto -
Patent number: 6608130Abstract: The present invention provides A polypropylene-based resin composition, comprising (A) 45 to 85 wt. % of a propylene/ethylene block copolymer, having a melt flow rate (MFR) of 100 g/10 min. or more for the propylene homopolymer portion and 50 to 200 g/10 min. for the total copolymer, (B) 0.5 to 20 wt. % of a propylene homopolymer having a weight-average molecular weight (Mw) of 10,000 to 110,000, (C) 5 to 35 wt. % of an ethylene/&agr;-olefin copolymer rubber and/or ethylene/&agr;-olefin/non-conjugate diene copolymer rubber, and/or hydrogenated block copolymer rubber, having an MFR of 0.1 to 20 g/10 min., and (D) 5 to 30 wt. % of talc having an average particle size of 10 &mgr;m or less, determined by the laser diffraction method.Type: GrantFiled: May 1, 2000Date of Patent: August 19, 2003Assignee: Japan Polychem CorporationInventors: Yukihito Zanka, Mitsuhiro Murayama
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Publication number: 20030092818Abstract: The present invention provides a resin composition high in melting flow, exhibiting good properties, excellent in moldability and shrinkage properties, and hence suitable for automobile exteriors, by including (A) propylene/ethylene block copolymer having a melt flow rate (MFR) of 100 to 200 g/10 min., its propylene homopolymer component having an MFR of 210 to 400 g/10 min. and isotactic pentad fraction of 0.98 or more, and its copolymer portion containing propylene at 65 to 85% by weight; 50 to 70% by weight, (B) ethylene/octene and/or ethylene/butene random copolymer; 10 to 25% by weight, (C) styrene-based hydrogenated block copolymer rubber; 4 to 9% by weight and (D) talc; 16 to 24% by weight.Type: ApplicationFiled: January 11, 2002Publication date: May 15, 2003Inventors: Masatoshi Matsuda, Hisayuki Iwai, Takayuki Nagai, Yukihito Zanka, Mitsuhiro Murayama, Yuji Fujita, Hironari Sano