Patents by Inventor Tetsuo Okura

Tetsuo Okura 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).

  • Publication number: 20220002510
    Abstract: Provided is a resin sheet for thermoforming, the resin sheet containing a poly(3-hydroxybutyrate) resin. A difference between a melting point peak temperature and a melting point peak end temperature in differential scanning calorimetry analysis of the poly(3-hydroxybutyrate) resin is 10° C. or more. The sheet has a thickness of 0.15 to 1 mm. The melt viscosity of the poly(3-hydroxybutyrate) resin at 160° C. is preferably 10000 poise or more.
    Type: Application
    Filed: September 21, 2021
    Publication date: January 6, 2022
    Applicant: KANEKA CORPORATION
    Inventor: Tetsuo OKURA
  • Publication number: 20210301127
    Abstract: Provided is a poly(3-hydroxybutyrate) resin tube including a poly(3-hydroxybutyrate) resin, the tube having a wall thickness of 0.1 to 0.6 mm. The difference between the melting point peak temperature and the melting point peak end temperature in differential scanning calorimetry analysis of the poly(3-hydroxybutyrate) resin is preferably 10° C. or higher. Preferably, production of the tube includes the step of melting a poly(3-hydroxybutyrate) resin in an extruder, then extruding the resin from an annular die, and introducing the resin into water, the annular die temperature being set to a temperature between the melting point peak temperature and the melting point peak end temperature in differential scanning calorimetry analysis of the poly(3-hydroxybutyrate) resin.
    Type: Application
    Filed: August 19, 2019
    Publication date: September 30, 2021
    Applicant: KANEKA CORPORATION
    Inventor: Tetsuo OKURA
  • Patent number: 11053386
    Abstract: Provided are a resin composition containing poly(3-hydroxyalkanoate), the resin composition enabling a film or a sheet to be stably produced under practical processing conditions by inflation molding; and a method for producing the resin composition. The resin composition includes 100 parts by weight of poly(3-hydroxyalkanoate) and 5 to 15 parts by weight of an ester compound, and having a ratio of 3.5×10?2 to 4.8×10?2 (sec/[Pa·s]) between a melt viscosity (Pa·s) and a drawdown time (sec).
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: July 6, 2021
    Assignee: KANEKA CORPORATION
    Inventors: Ryohei Koyama, Tetsuo Okura
  • Publication number: 20200181397
    Abstract: Provided are a resin composition containing poly(3-hydroxyalkanoate), the resin composition enabling a film or a sheet to be stably produced under practical processing conditions by inflation molding; and a method for producing the resin composition. The resin composition includes 100 parts by weight of poly(3-hydroxyalkanoate) and 5 to 15 parts by weight of an ester compound, and having a ratio of 3.5×10?2 to 4.8×10?2 (sec/[Pa·s]) between a melt viscosity (Pa·s) and a drawdown time (sec).
    Type: Application
    Filed: January 13, 2020
    Publication date: June 11, 2020
    Applicant: KANEKA CORPORATION
    Inventors: Ryohei KOYAMA, Tetsuo OKURA
  • Publication number: 20190082719
    Abstract: Disclosed herein is a feed composition that promotes the growth of zooplankton, enhances the survival rate of zooplankton, is safe, and has little adverse effect on the environment. The feed composition for zooplankton contains PHA.
    Type: Application
    Filed: March 7, 2017
    Publication date: March 21, 2019
    Applicant: KANEKA CORPORATION
    Inventors: Shunsuke SATO, Tetsuo OKURA
  • Patent number: 9850376
    Abstract: A resin composition for producing a film or sheet having high tear strength that is excellent in processability, mechanical properties, and biodegradability. The resin composition is a biodegradable polyester resin composition containing: (i) an aliphatic polyester (P3HA) having a repeating unit of formula (1): [—CHR—CH2—CO—O—] (1), wherein R is an alkyl group represented by CnH2n+1, where n is an integer of 1 or more and 15 or less; (ii) polybutylene adipate terephthalate (PBAT); and hydrophilic silica (A), wherein a weight ratio of the aliphatic polyester (P3HA) to the polybutylene adipate terephthalate (PBAT) is 90/10 to 10/90, and an amount of the hydrophilic silica (A) is 2 to 30 parts by weight with respect to 100 parts by weight of a total amount of the aliphatic polyester (P3HA) and the polybutylene adipate terephthalate (PBAT) combined.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: December 26, 2017
    Assignee: KANEKA CORPORATION
    Inventors: Tetsuo Okura, Ryohei Koyama
  • Publication number: 20150232660
    Abstract: Provided is a resin composition that is suitable for use in producing a film or sheet having high tear strength and is excellent in processability, mechanical properties, and biodegradability. The resin composition is a biodegradable polyester resin composition containing an aliphatic polyester (P3HA) having a repeating unit represented by the following general formula (1) [—CHR—CH2—CO—O—]??(1) (wherein R is an alkyl group represented by CnH2n+1 and n is an integer of 1 or more and 15 or less), polybutylene adipate terephthalate (PBAT), and hydrophilic silica (A), wherein a weight ratio of the aliphatic polyester (P3HA) to the polybutylene adipate terephthalate (PBAT) is 90/10 to 10/90, and an amount of the hydrophilic silica (A) contained is 2 to 30 parts by weight with respect to 100 parts by weight of a total amount of the aliphatic polyester (P3HA) and the polybutylene adipate terephthalate (PBAT) contained.
    Type: Application
    Filed: October 1, 2013
    Publication date: August 20, 2015
    Applicant: KANEKA CORPORATION
    Inventors: Tetsuo Okura, Ryohei Koyama
  • Patent number: 8552116
    Abstract: A polypropylene resin and a polypropylene resin composition are provided, which have excellent fluidity and foaming properties, and particularly in use for foam injection molding, allow molding with a narrow initial cavity clearance even if a large mold is used, and therefore can provide a thin, large-area foam-injection-molded article having good appearance. The invention relates to a polypropylene resin obtained by melt mixing a linear polypropylene resin, a radical polymerization initiator and a conjugated diene compound, wherein the polypropylene resin has a melt flow rate of more than 30 g/10 min and not more than 250 g/10 min as measured at 230° C. under a load of 2.16 kg; a melt tension at 200° C. of not less than 0.3 cN; and a loss tangent (tan ?) of not more than 6.0, the loss tangent being a ratio of loss modulus to storage modulus at an angular frequency of 1 rad/s in dynamic viscoelasticity measurement at 200° C.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: October 8, 2013
    Assignee: Kaneka Corporation
    Inventors: Tetsuo Okura, Terumasa Abe, Ryoji Nakayama
  • Publication number: 20120264886
    Abstract: A polypropylene resin and a polypropylene resin composition are provided, which have excellent fluidity and foaming properties, and particularly in use for foam injection molding, allow molding with a narrow initial cavity clearance even if a large mold is used, and therefore can provide a thin, large-area foam-injection-molded article having good appearance. The invention relates to a polypropylene resin obtained by melt mixing a linear polypropylene resin, a radical polymerization initiator and a conjugated diene compound, wherein the polypropylene resin has a melt flow rate of more than 30 g/10 min and not more than 250 g/10 min as measured at 230° C. under a load of 2.16 kg; a melt tension at 200° C. of not less than 0.3 cN; and a loss tangent (tan ?) of not more than 6.0, the loss tangent being a ratio of loss modulus to storage modulus at an angular frequency of 1 rad/s in dynamic viscoelasticity measurement at 200° C.
    Type: Application
    Filed: October 12, 2010
    Publication date: October 18, 2012
    Applicant: KANEKA CORPORATION
    Inventors: Tetsuo Okura, Terumasa Abe, Ryoji Nakayama
  • Publication number: 20110200813
    Abstract: Disclosed is a process for producing a thermoplastic resin foam film that can produce a thin thermoplastic resin foam film. The process comprises the step of cutting a thermoplastic resin foam. The process is characterized in that, in the step of cutting the thermoplastic resin foam, at least one of the thermoplastic resin foam and a blade is reciprocated, and, when at least one of the thermoplastic resin foam and the blade is reciprocated, and the thermoplastic resin foam and the blade are slid in the movement of the foam or the blade on at least one of the advancement path and the return path of the reciprocation movement, whereby the thermoplastic resin foam is intermittently cut.
    Type: Application
    Filed: October 16, 2009
    Publication date: August 18, 2011
    Applicant: KANEKA CORPORATION
    Inventor: Tetsuo Okura
  • Patent number: 6077878
    Abstract: The present invention relates to a foamed article comprising a modified polypropylene resin which is a graft copolymer of a polypropylene resin and an aromatic vinyl monomer and has an average number of the grafted aromatic vinyl chains of not less than 1 in one molecule of the graft copolymer and a weight average molecular weight of the grafted aromatic vinyl chains of not less than 200, and relates to a process for preparation thereof. According to the present invention, the foamed article comprising the polypropylene resin and having a high closed cell content, a high expansion ratio and good external appearance can be provided.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: June 20, 2000
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Tetsuo Okura, Mitsuharu Kourogi, Yoshifumi Fukui, Hesun Kim, Haruo Tomita, Osamu Miyama, Taizo Aoyama
  • Patent number: 5902858
    Abstract: A modified polypropylene resin obtained by melt-kneading a polypropylene resin, an isoprene monomer and a radical polymerization initiator, which has a high melt viscosity and a high melt tensile strengh and is hard to cause draw-down, and which provides, by foaming thereof, foamed articles having low density, high closed cell content, beautiful appearance and excellent heat resistance.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: May 11, 1999
    Assignee: Kaneka Corporation
    Inventors: Tetsuo Okura, Osamu Miyama, Haruo Tomita