Patents by Inventor Masataka Nakamura

Masataka Nakamura 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: 20190148756
    Abstract: The present invention relates to a method for producing a polymer electrolyte molded article, which comprises forming a polymer electrolyte precursor having a protective group and an ionic group, and deprotecting at least a portion of protective groups contained in the resulting molded article to obtain a polymer electrolyte molded article. According to the present invention, it is possible to obtain a polymer electrolyte material and a polymer electrolyte molded article, which are excellent in proton conductivity and are also excellent in fuel barrier properties, mechanical strength, physical durability, resistance to hot water, resistance to hot methanol, processability and chemical stability. A polymer electrolyte fuel cell using a polymer electrolyte membrane, polymer electrolyte parts or a membrane electrode assembly can achieve high output, high energy density and long-term durability.
    Type: Application
    Filed: January 11, 2019
    Publication date: May 16, 2019
    Inventors: Daisuke IZUHARA, Hiroshi TAIKO, Yuriko OKADA, Shinya ADACHI, Masataka NAKAMURA
  • Publication number: 20190099511
    Abstract: Disclosed are: a polymer for treating the surface of a medical device such as a contact lens to suppress the reduction in lubricity of the device even when the device is scrubbed; a medical device having the polymer on the surface so that the reduction in lubricity over time is suppressed; and a wetting agent containing the polymer. The polymer for treating the surface is a copolymer which is water-soluble and includes as constitutional units the following monomers A and B: monomer A: a monomer containing a (meth)acryloyl group and an ester or amide structure in a molecule, in which the ester or amide structure is not constituted by including a part of the (meth)acryloyl group; monomer B: a monomer containing a (meth)acrylamide group in a molecule and having a structure different from that of the monomer A.
    Type: Application
    Filed: March 17, 2017
    Publication date: April 4, 2019
    Applicant: Toray Industries, Inc.
    Inventors: Kyohei Yamashita, Takeshi Ishigaki, Masataka Nakamura
  • Patent number: 10240034
    Abstract: The present invention relates to a silicone acrylamide copolymer of high acrylamide monomer content which has transparency and low modulus, employing the following configuration. The copolymer is suitably used for various kinds of medical devices, particularly ophthalmic lenses such as a contact lens, an intraocular lens, an artificial cornea, and is especially suitable for a contact lens. A copolymer comprising (A) a multi-functional (meth)acrylamide monomer having at least one siloxane bond and at least two (meth)acrylamide groups within a molecule and (B) a mono-functional linear silicone (meth)acrylamide monomer.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: March 26, 2019
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Ryuta Tamiya, Kazuhiko Fujisawa, Masataka Nakamura, Thomas L. Maggio, Michelle Carman Turnage, Michael R. Clark
  • Patent number: 10224562
    Abstract: The present invention relates to a method for producing a polymer electrolyte molded article, which comprises forming a polymer electrolyte precursor having a protective group and an ionic group, and deprotecting at least a portion of protective groups contained in the resulting molded article to obtain a polymer electrolyte molded article. According to the present invention, it is possible to obtain a polymer electrolyte material and a polymer electrolyte molded article, which are excellent in proton conductivity and are also excellent in fuel barrier properties, mechanical strength, physical durability, resistance to hot water, resistance to hot methanol, processability and chemical stability. A polymer electrolyte fuel cell using a polymer electrolyte membrane, polymer electrolyte parts or a membrane electrode assembly can achieve high output, high energy density and long-term durability.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: March 5, 2019
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Daisuke Izuhara, Hiroshi Taiko, Yuriko Okada, Shinya Adachi, Masataka Nakamura
  • Publication number: 20190048117
    Abstract: To obtain a hydrophilic macromonomer mixture which is a highly polymerized hydrophilic macromonomer, has few components not bonded to the polymer chain after polymerization, and is less likely to leaching. Provided is a macromonomer mixture containing macromonomer A being a macromonomer having a group obtained by further introducing a polymerizable group into a reactive group derived from a polymerization initiator at an end thereof; and macromonomer B being a macromonomer having a group obtained by further introducing a polymerizable group into a reactive group derived from a chain transfer agent at an end thereof.
    Type: Application
    Filed: October 18, 2018
    Publication date: February 14, 2019
    Inventors: Kazuhiko Fujisawa, Masataka Nakamura
  • Publication number: 20190022282
    Abstract: A device includes a substrate and a hydrophilic polymer layer made of a hydrophilic polymer having a hydroxyl group. The hydrophilic polymer layer having a hydroxyl group is fixed to at least a part of a surface of the substrate and the hydrophilic polymer further has an amide group. A liquid film retention time of the device is 15 seconds or more. The device has a surface of a substrate which is hydrophilized. A method for producing the device by a simple method is also disclosed.
    Type: Application
    Filed: February 22, 2017
    Publication date: January 24, 2019
    Applicant: Toray Industries, Inc.
    Inventors: Rumiko Kitagawa, Masataka Nakamura
  • Publication number: 20190015542
    Abstract: Disclosed is a device including a substrate and a gel layer made of a hydrophilic polymer having a hydroxyl group. The gel layer is fixed to at least a part on a surface of the substrate in a thickness of 1 nm to 3,000 nm and an elastic modulus of a device surface is 6.00×103 Pa or less.
    Type: Application
    Filed: February 22, 2017
    Publication date: January 17, 2019
    Applicant: Toray Industries, Inc.
    Inventors: Rumiko Kitagawa, Masataka Nakamura
  • Patent number: 10125209
    Abstract: To obtain a hydrophilic macromonomer mixture which is a highly polymerized hydrophilic macromonomer, has few components not bonded to the polymer chain after polymerization, and is less likely to leaching. Provided is a macromonomer mixture containing macromonomer A being a macromonomer having a group obtained by further introducing a polymerizable group into a reactive group derived from a polymerization initiator at an end thereof; and macromonomer B being a macromonomer having a group obtained by further introducing a polymerizable group into a reactive group derived from a chain transfer agent at an end thereof.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: November 13, 2018
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Kazuhiko Fujisawa, Masataka Nakamura
  • Patent number: 10087274
    Abstract: In order to provide a silicone hydrogel which has high uniformity in polymerization rates of polymerization components used for copolymerization, excellent mechanical characteristics, excellent optical characteristics and good shape recoverability and in order to also provide various medical devices and ocular lenses having an excellent balance among elasticity, wettability and transparency, the present invention provides a silicone hydrogel which has a repeating unit derived from a monofunctional linear silicone (meth)acrylate and a repeating unit derived from a hydrophilic (meth)acrylate, and wherein the content of the repeating units derived from (meth)acrylates is more than 80% by mass.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: October 2, 2018
    Assignee: Toray Industries, Inc.
    Inventors: Tomohiro Kato, Kazuhiko Fujisawa, Masataka Nakamura
  • Patent number: 10023522
    Abstract: The hydroxyalkyl acrylate according to the present invention is characterized in that a content amount of an ester generated from acrylic acid dimer and an alkylene oxide is not more than 0.10 mass %. The method for producing a hydroxyalkyl acrylate according to the present invention is characterized in comprising the step of reacting acrylic acid with an alkylene oxide in the presence of a catalyst, wherein a content amount of acrylic acid dimer in the raw material acrylic acid is not more than 3.00 mass %.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: July 17, 2018
    Assignee: NIPPON SHOKUBAI CO., LTD.
    Inventors: Masataka Nakamura, Tokumasa Ishida, Hiroyuki Takaki, Hiroshi Jinno
  • Publication number: 20180125775
    Abstract: A skin adhesive sheet is disclosed which is good in tackiness to the skin surface, does not easily dry even when used for a long time, can maintain flexibility, and is small in the shape variation. The skin adhesive sheet includes a copolymer containing the following components A and C as polymerization components, and having a water content less than 10% by mass: component A: a polysiloxane macromonomer having a plurality of polymerizable functional groups per molecule, and having a number average molecular weight of 6,000 or more; and component C: a polymerizable monomer having an alkyl group and having no fluoroalkyl group.
    Type: Application
    Filed: May 27, 2015
    Publication date: May 10, 2018
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Rumiko Kitagawa, Masataka Nakamura
  • Publication number: 20170321051
    Abstract: The present invention relates to a silicone acrylamide copolymer of high acrylamide monomer content which has transparency and low modulus, employing the following configuration. The copolymer is suitably used for various kinds of medical devices, particularly ophthalmic lenses such as a contact lens, an intraocular lens, an artificial cornea, and is especially suitable for a contact lens. A copolymer comprising (A) a multi-functional (meth)acrylamide monomer having at least one siloxane bond and at least two (meth)acrylamide groups within a molecule and (B) a mono-functional linear silicone (meth)acrylamide monomer.
    Type: Application
    Filed: July 24, 2017
    Publication date: November 9, 2017
    Inventors: Ryuta Tamiya, Kazuhiko Fujisawa, Masataka Nakamura, Thomas L. Maggio, Michelle Carman Turnage, Michael R. Clark
  • Patent number: 9795636
    Abstract: The invention relates to a stable bicarbonate ion-containing drug solution, particularly a bicarbonate-containing drug solution for dialysis in which the stability has been improved by the presence of a phosphate ion. Further, the invention relates to a drug solution for acute blood purification, particularly a dialysate and a substitution liquid for acute blood purification to be mixed before use containing the drug solution. Still further, the invention relates to a dialysate and a substitution liquid for acute blood purification to be mixed before use in which the formation of insoluble fine particles or precipitates is prevented for a long time after mixing and with which hypokalemeia and hypophosphatemia are not caused.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: October 24, 2017
    Assignees: NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY, FUSO PHARMACEUTICAL INDUSTRIES, LTD.
    Inventors: Shigeto Oda, Tomohito Sadahiro, Masataka Nakamura, Syuichi Tanaka, Shogo Tokuoka, Hiroya Otani
  • Patent number: 9778488
    Abstract: A medical device includes a layer made of an acidic polymer and a basic polymer formed on at least a part of a surface of a water-containing base material, wherein at least one kind of an acidic polymer and a basic polymer forming the acidic polymer or the basic polymer is a polymer having a hydroxy group.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: October 3, 2017
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Kazuhiko Fujisawa, Rumiko Kitagawa, Masataka Nakamura
  • Patent number: 9753187
    Abstract: Provided are a low hydrous soft ophthalmic lens that can remarkably reduce or avoid a phenomenon in which a lens sticks to a cornea when worn and can reduce a decrease in the performance of a coating layer when rubbing the low hydrous soft ophthalmic lens for cleaning and a method for manufacturing the same. The low hydrous soft ophthalmic lens has a layer formed of a hydrophilic polymer on at least part of the surface of a base material containing a polysiloxane compound, and at least part of the inside of the layer is cross-linked.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: September 5, 2017
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Rumiko Kitagawa, Masataka Nakamura, Satoru Ogasahara
  • Patent number: 9745460
    Abstract: The present invention relates to a silicone acrylamide copolymer of high acrylamide monomer content which has transparency and low modulus, employing the following configuration. The copolymer is suitably used for various kinds of medical devices, particularly ophthalmic lenses such as a contact lens, an intraocular lens, an artificial cornea, and is especially suitable for a contact lens. A copolymer comprising (A) a multi-functional (meth)acrylamide monomer having at least one siloxane bond and at least two (meth)acrylamide groups within a molecule and (B) a mono-functional linear silicone (meth)acrylamide monomer.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: August 29, 2017
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Ryuta Tamiya, Kazuhiko Fujisawa, Masataka Nakamura, Thomas L. Maggio, Michelle Carman Turnage, Michael R. Clark
  • Publication number: 20170204213
    Abstract: In order to provide a silicone hydrogel which has high uniformity in polymerization rates of polymerization components used for copolymerization, excellent mechanical characteristics, excellent optical characteristics and good shape recoverability and in order to also provide various medical devices and ocular lenses having an excellent balance among elasticity, wettability and transparency, the present invention provides a silicone hydrogel which has a repeating unit derived from a monofunctional linear silicone (meth)acrylate and a repeating unit derived from a hydrophilic (meth)acrylate, and wherein the content of the repeating units derived from (meth)acrylates is more than 80% by mass.
    Type: Application
    Filed: June 16, 2015
    Publication date: July 20, 2017
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Tomohiro KATO, Kazuhiko FUJISAWA, Masataka NAKAMURA
  • Patent number: 9632212
    Abstract: To provide a medical device which is excellent in wettability and lubricity and is also scarcely broken since it is soft, by a medical device in which a layer made of an acidic polymer and a basic polymer is formed on at least a part of a surface of a low water content soft base material, the low water content soft base material containing, as a main component, a copolymer containing a monofunctional monomer component M having one polymerizable functional group and one silicone moiety per molecule.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: April 25, 2017
    Assignee: Toray Industries, Inc.
    Inventors: Kazuhiko Fujisawa, Rumiko Kitagawa, Masataka Nakamura
  • Patent number: 9617423
    Abstract: The present invention relates to macroinitiators comprising at least one hydrophobic segments in a molecule, wherein a molecular weight of the hydrophobic segment is 300 to 1800. The present invention further relates to block copolymers, wetting agent and polymeric materials having the block copolymers of the present invention associated with, which is suitable for medical devices, particularly for ophthalmic devices, including contact lenses, ophthalmic lenses, punctal plugs and artificial corneas.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: April 11, 2017
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Ryuta Tamiya, Kazuhiko Fujisawa, Masataka Nakamura
  • Publication number: 20160331261
    Abstract: In order to provide an electrode equipped with an insulating wall having excellent patterning properties as well as excellent biocompatibility, there is provided an electrode including, on a substrate, an electrode element; and an insulating wall formed around the electrode element, constituted of a polysiloxane compound (component A) having, per molecule, two or more functional groups selected from the group consisting of a (meth)acryloyl group, a styrenic vinyl group, a vinyl ester group, a maleic acid ester group and a maleimide group, and formed from a polymer obtained by reaction of the functional groups.
    Type: Application
    Filed: February 5, 2015
    Publication date: November 17, 2016
    Applicants: TORAY INDUSTRIES, INC.
    Inventors: Takao SOMEYA, Tsuyoshi SEKITANI, Kazunori KURIBARA, Ryuta TAMIYA, Masataka NAKAMURA