Patents by Inventor Tadashi Sawasato
Tadashi Sawasato 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).
-
Block copolymer composition, heat shrink film using same, and package provided with heat shrink film
Patent number: 11760825Abstract: A block copolymer composition containing at least one type of block copolymer component obtained by using a vinyl aromatic hydrocarbon and a conjugated diene, wherein the block copolymer composition satisfies the conditions (1) to (3) indicated below. (1) The weight-average molecular weight is at least 100000 and at most 300000, and the conjugated diene content is at least 18 mass % and at most 35 mass %. (2) The vinyl aromatic hydrocarbon block percentage is at least 80% and at most 100% relative to the total amount of the vinyl aromatic hydrocarbon. (3) At least 30 mass % and at most 60 mass % of block copolymer components having a conjugated diene content of at least 30 mass % are included.Type: GrantFiled: July 26, 2019Date of Patent: September 19, 2023Assignee: DENKA COMPANY LIMITEDInventors: Tadashi Sawasato, Yuya Nakamura, Jun Yoshida -
Patent number: 11685815Abstract: To provide a vinylidene-fluoride resin film having low cloudiness and good visibility of a pattern and the like of a decorative film of a lower layer although having a matte tone with low glossiness. The vinylidene-fluoride resin film comprises crosslinked acrylic acid ester resin particles, in which the crosslinked acrylic acid ester resin particles have an average particle diameter of 5% or more and 40% or less to the thickness of the vinylidene-fluoride resin film and the arithmetic average surface roughness (Ra) of the vinylidene-fluoride resin film is 0.4 ?m or more and less than 2 ?m.Type: GrantFiled: May 31, 2018Date of Patent: June 27, 2023Assignee: DENKA COMPANY LIMITEDInventors: Kouta Nagaoka, Tadashi Sawasato, Keiji Takano
-
BLOCK COPOLYMER COMPOSITION, HEAT SHRINK FILM USING SAME, AND PACKAGE PROVIDED WITH HEAT SHRINK FILM
Publication number: 20210284781Abstract: A block copolymer composition containing at least one type of block copolymer component obtained by using a vinyl aromatic hydrocarbon and a conjugated diene, wherein the block copolymer composition satisfies the conditions (1) to (3) indicated below. (1) The weight-average molecular weight is at least 100000 and at most 300000, and the conjugated diene content is at least 18 mass % and at most 35 mass %. (2) The vinyl aromatic hydrocarbon block percentage is at least 80% and at most 100% relative to the total amount of the vinyl aromatic hydrocarbon. (3) At least 30 mass % and at most 60 mass % of block copolymer components having a conjugated diene content of at least 30 mass % are included.Type: ApplicationFiled: July 26, 2019Publication date: September 16, 2021Applicant: DENKA COMPANY LIMITEDInventors: Tadashi SAWASATO, Yuya NAKAMURA, Jun YOSHIDA -
Patent number: 10781305Abstract: Provided is an ECTFE resin composition that is superior in transparency and resistant to yellowing for an extended period of time. The ECTFE resin composition generates a smaller amount of acidic gases, for example, when it is extrusion molded at high temperature. It is an ethylene-chlorotrifluoroethylene copolymer resin composition including a bisphenol-based antioxidant. It is preferably an ethylene-chlorotrifluoroethylene copolymer resin composition additionally including a phosphorus-based antioxidant.Type: GrantFiled: October 4, 2017Date of Patent: September 22, 2020Assignee: DENKA COMPANY LIMITEDInventors: Mutsumi Matsumoto, Tadashi Sawasato
-
Publication number: 20200140636Abstract: To provide a vinylidene-fluoride resin film having low cloudiness and good visibility of a pattern and the like of a decorative film of a lower layer although having a matte tone with low glossiness. The vinylidene-fluoride resin film comprises crosslinked acrylic acid ester resin particles, in which the crosslinked acrylic acid ester resin particles have an average particle diameter of 5% or more and 40% or less to the thickness of the vinylidene-fluoride resin film and the arithmetic average surface roughness (Ra) of the vinylidene-fluoride resin film is 0.4 ?m or more and less than 2 ?m.Type: ApplicationFiled: May 31, 2018Publication date: May 7, 2020Applicant: DENKA COMPANY LIMITEDInventors: Kouta NAGAOKA, Tadashi SAWASATO, Keiji TAKANO
-
Publication number: 20190177526Abstract: Provided is an ECTFE resin composition that is superior in transparency and resistant to yellowing for an extended period of time. The ECTFE resin composition generates a smaller amount of acidic gases, for example, when it is extrusion molded at high temperature. It is an ethylene-chlorotrifluoroethylene copolymer resin composition including a bisphenol-based antioxidant. It is preferably an ethylene-chlorotrifluoroethylene copolymer resin composition additionally including a phosphorus-based antioxidant.Type: ApplicationFiled: October 4, 2017Publication date: June 13, 2019Inventors: Mutsumi MATSUMOTO, Tadashi SAWASATO
-
Patent number: 9732215Abstract: A block copolymer composition with a good balance of physical properties suitable for various types of packaging such as food product containers, beverage containers, industrial containers and blister packs, having excellent transparency, gloss, strength, rigidity and formability, having excellent anti-blocking properties and anti-sticking properties, and excelling in the aforementioned properties even when used in mixture with vinyl aromatic hydrocarbon-type polymers is offered.Type: GrantFiled: May 2, 2013Date of Patent: August 15, 2017Assignee: DENKA COMPANY LIMITEDInventors: Tadashi Sawasato, Eiji Sato, Hitoshi Nakazawa, Shinya Uekusa
-
Patent number: 9296852Abstract: A resin composition having as a main ingredient a block copolymer composed of at least one type of vinyl aromatic hydrocarbon and a conjugated diene, the resin composition being characterized in that the Vicat softening point temperature measured under a 10-N load as per ISO306 is 65-90° C., the flexural strength measured as per ISO178 is 58-80 MPa, the proportion of the conjugated diene in the resin composition is 10-25 mass %, and the resin composition has molecular weight peaks, the peaks being derived from the block copolymer composed of the vinyl aromatic hydrocarbon and the conjugated diene, at molecular weights in the ranges of 70,000-150,000 and 150,000-350,000, respectively.Type: GrantFiled: February 24, 2012Date of Patent: March 29, 2016Assignee: DENKA COMPANY LIMITEDInventors: Tadashi Sawasato, Eiji Sato, Katumi Ito
-
Publication number: 20150152257Abstract: A block copolymer composition with a good balance of physical properties suitable for various types of packaging such as food product containers, beverage containers, industrial containers and blister packs, having excellent transparency, gloss, strength, rigidity and formability, having excellent anti-blocking properties and anti-sticking properties, and excelling in the aforementioned properties even when used in mixture with vinyl aromatic hydrocarbon-type polymers is offered.Type: ApplicationFiled: May 2, 2013Publication date: June 4, 2015Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Tadashi Sawasato, Eiji Sato, Hitoshi Nakazawa, Shinya Uekusa
-
Publication number: 20130331519Abstract: A resin composition having as a main ingredient a block copolymer composed of at least one type of vinyl aromatic hydrocarbon and a conjugated diene, the resin composition being characterized in that the Vicat softening point temperature measured under a 10-N load as per ISO306 is 65-90° C., the flexural strength measured as per ISO178 is 58-80 MPa, the proportion of the conjugated diene in the resin composition is 10-25 mass %, and the resin composition has molecular weight peaks, the peaks being derived from the block copolymer composed of the vinyl aromatic hydrocarbon and the conjugated diene, at molecular weights in the ranges of 70,000-150,000 and 150,000-350,000, respectively.Type: ApplicationFiled: February 24, 2012Publication date: December 12, 2013Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Tadashi Sawasato, Eiji Sato, Katumi Ito
-
Patent number: 8258236Abstract: The present invention relates to tubular forming material made of a composition comprising block copolymers each made of a vinyl aromatic hydrocarbon and a conjugated diene, which has a uniaxial elongation viscosity at 88° C. at a strain rate of 0.5 sec?1 satisfying the following formula between 1.0 sec and 2.8 sec after initiation of elongation, 0.25<(LOG ?2.8?LOG ?1.0)/(2.8?1.0)<0.4 wherein ?1.0 and ?2.8 represent uniaxial elongation viscosities (Pa·sec) at elongation times of 1.0 sec and 2.8 sec, respectively, when measured by a Meissner model elongation viscometer. The composition contains three block copolymers at a specified blend ratio.Type: GrantFiled: December 21, 2007Date of Patent: September 4, 2012Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Tadashi Sawasato, Eiji Sato, Hideki Toya, Hitoshi Nakazawa
-
Publication number: 20100022711Abstract: To provide a tubular forming material excellent in bubble formation stability in the case of producing a heat-shrinkable film. To provide a tubular forming material made of a composition comprising block copolymers each made of a vinyl aromatic hydrocarbon and a conjugated diene, which has uniaxial elongation viscosity at 88° C. at a strain rate of 0.5 sec?1 satisfying the following formula between 1.0 sec and 2.8 sec after initiation of elongation, 0.25<(LOG ?2.8?LOG ?1.0)/(2.8?1.0)<0.4 wherein ?1.0 and ?2.8 represent uniaxial elongation viscosities at elongation times of 1.0 sec and 2.8 sec, respectively, when measured by a Meissner model elongation viscometer.Type: ApplicationFiled: December 21, 2007Publication date: January 28, 2010Applicant: Denki Kagaku Kogyo Kabushiki KaishaInventors: Tadashi Sawasato, Eiji Sato, Hideki Toya, Hitoshi Nakazawa