Patents Assigned to Nitto Boseki Co. Ltd.
  • Publication number: 20190367683
    Abstract: Provided are a copolymer of diallylamines and sulfur dioxide having a high molecular weight and a low content amount of impurities such as halogens, and a production method with which it is possible to produce such a copolymer relatively simply and at low cost. This problem is solved by: a copolymer having a weight-average molecular weight of 150,000 or higher obtained by GPC measurement and a degree of polymerization of 1000 or higher, the copolymer being obtained by copolymerizing sulfur dioxide and a sulfonate or alkyl sulfate salt of diallylamines having a specific structure; and a method for producing a copolymer, the method having a step for copolymerizing sulfur dioxide and a sulfonate or alkyl sulfate salt of diallylamines having a specific structure in ethylene glycol or in propylene glycol monomethyl ether.
    Type: Application
    Filed: August 14, 2019
    Publication date: December 5, 2019
    Applicant: NITTO BOSEKI CO., LTD.
    Inventors: Nobuyuki YAMADA, Masaru BUNYA
  • Patent number: 10442895
    Abstract: Provided are a copolymer of diallylamines and sulfur dioxide having a high molecular weight and a low content amount of impurities such as halogens, and a production method with which it is possible to produce such a copolymer relatively simply and at low cost. This problem is solved by: a copolymer having a weight-average molecular weight of 150,000 or higher obtained by GPC measurement and a degree of polymerization of 1000 or higher, the copolymer being obtained by copolymerizing sulfur dioxide and a sulfonate or alkyl sulfate salt of diallylamines having a specific structure; and a method for producing a copolymer, the method having a step for copolymerizing sulfur dioxide and a sulfonate or alkyl sulfate salt of diallylamines having a specific structure in ethylene glycol or in propylene glycol monomethyl ether.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: October 15, 2019
    Assignee: NITTO BOSEKI CO., LTD.
    Inventors: Nobuyuki Yamada, Masaru Bunya
  • Patent number: 10252258
    Abstract: The purpose of the present invention is to provide a method for separating and concentrating a target substance as an alternative to existing cationic polymers, and a kit for implementing this method.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: April 9, 2019
    Assignee: NITTO BOSEKI CO., LTD.
    Inventors: Kazuho Ashizawa, Kenta Noda, Koji Watanabe, Yoko Teruuchi, Masaru Bunya
  • Patent number: 10214592
    Abstract: The purpose of the present invention is to provide a monoclonal antibody that is useful in specifically assaying tartrate resistant acid phosphatase 5b (TRACP-5b). A hybridoma producing a monoclonal antibody against TRACP-5b, said monoclonal antibody showing higher reactivity with TRACP-5b than with tartrate resistant acid phosphatase 5a (TRACP-5a) and, therefore, being specific to TRACP-5b, is obtained by cell fusion using, as an antigen, human recombinant TRACP-5b purified from silkworm silk gland. By using this monoclonal antibody, TRACP-5b in a specimen can be highly sensitively and specifically detected.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: February 26, 2019
    Assignee: NITTO BOSEKI CO., LTD.
    Inventors: Wataru Kikuchi, Kumiko Sasagawa, Kenta Noda
  • Patent number: 10196011
    Abstract: In a glass chopped strand mat, a short chopped strand layer having first glass chopped strands with an average length of 25.4 to 76.2 mm and a long chopped strand layer having second glass chopped strands with an average length of 76.2 to 203.2 mm are laminated, a difference between the average length of the first glass chopped strands and that of the second glass chopped strands is 25.4 mm or greater, the short chopped strand layer occupies 50 to 70 parts by mass, and the long chopped strand layer occupies 30 to 50 parts by mass with respect to 100 parts by mass of the glass chopped strand mat, a mass per unit area of the glass chopped strand mat is 180 g/m2 or lower, and a loss on ignition of the glass chopped strand mat measured on the basis of JIS R 3420 is lower than 10%.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: February 5, 2019
    Assignee: Nitto Boseki Co., Ltd.
    Inventors: Mitsuhiro Omiya, Masatoshi Suzuki
  • Patent number: 10189931
    Abstract: Provided are: a graft copolymer which can be safely and stably produced with simple operation, while maintaining the characteristics of an amine, and which is lower in the introduction cost than conventional graft copolymers; and a method for producing the graft copolymer. A polyamine graft polymer that is obtained by polymerizing a polyamine derivative, which is obtained by reacting a polymer compound (a) having at least one amino group with a compound (b) having at least one epoxy group, with an ethylenically unsaturated monomer (c). A method for producing a polyamine graft polymer, which comprises a step for adding, for polymerization, an ethylenically unsaturated monomer (c) and a radical polymerization initiator to a polyamine derivative, which is obtained by reacting a polymer compound (a) having at least one amino group with a compound (b) having at least one epoxy group, in a polar solvent.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: January 29, 2019
    Assignee: NITTO BOSEKI CO., LTD.
    Inventors: Koji Watanabe, Masaru Bunya
  • Patent number: 10160403
    Abstract: In a glass chopped strand mat, a short chopped strand layer having first glass chopped strands with an average length of 25.4 to 76.2 mm and a long chopped strand layer having second glass chopped strands with an average length of 76.2 to 203.2 mm are laminated, a difference between the average length of the first glass chopped strands and that of the second glass chopped strands is 25.4 mm or greater, the short chopped strand layer occupies 50 to 70 parts by mass, and the long chopped strand layer occupies 30 to 50 parts by mass with respect to 100 parts by mass of the glass chopped strand mat, a mass per unit area of the glass chopped strand mat is 180 g/m2 or lower, and a loss on ignition of the glass chopped strand mat measured on the basis of JIS R 3420 is lower than 10%.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: December 25, 2018
    Assignee: Nitto Boseki Co., Ltd.
    Inventors: Mitsuhiro Omiya, Masatoshi Suzuki
  • Patent number: 10029443
    Abstract: Provided is a glass fiber fabric-resin composition laminate which is thinner than the conventional glass fiber fabric-resin composition laminates and has a strength equal to or higher than that of the conventional laminates. In the glass fiber fabric-resin composition laminate 1, one or more layers of first glass fiber fabrics 2 to 5 have a total thickness of 50 to 100% with respect to the overall thickness. The glass composition of the first glass fiber fabrics 2 to 5 is 57 to 70 mass % of SiO2, 18 to 30 mass % of Al2O3, 5 to 15 mass % of MgO, 0 to 12 mass % of CaO, 0 to 1 mass % of at least one of Li2O, Na2O, and K2O, 0 to 1 mass % of TiO2, and 0 to 1 mass % of B2O3.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: July 24, 2018
    Assignee: Nitto Boseki Co., Ltd.
    Inventors: Dai Sakuma, Noriyoshi Sato, Toshihiro Tashiro
  • Publication number: 20180186937
    Abstract: Provided are a copolymer of diallylamines and sulfur dioxide having a high molecular weight and a low content amount of impurities such as halogens, and a production method with which it is possible to produce such a copolymer relatively simply and at low cost. This problem is solved by: a copolymer having a weight-average molecular weight of 150,000 or higher obtained by GPC measurement and a degree of polymerization of 1000 or higher, the copolymer being obtained by copolymerizing sulfur dioxide and a sulfonate or alkyl sulfate salt of diallylamines having a specific structure; and a method for producing a copolymer, the method having a step for copolymerizing sulfur dioxide and a sulfonate or alkyl sulfate salt of diallylamines having a specific structure in ethylene glycol or in propylene glycol monomethyl ether.
    Type: Application
    Filed: October 7, 2016
    Publication date: July 5, 2018
    Applicant: NITTO BOSEKI CO., LTD.
    Inventors: Nobuyuki YAMADA, Masaru BUNYA
  • Patent number: 9951192
    Abstract: The present invention relates to cellulose nanofibers that have good dispersibility in water and can be contained in a water-soluble polymer at high concentration, and to a method for obtaining the cellulose nanofibers. The present invention further relates to a fiber reinforced composite material using the cellulose nanofibers. Cellulose nanofibers having an average degree of polymerization of 100 or more and 800 or less and an aspect ratio of 150 or more and 2000 or less are produced by subjecting unmodified cellulose to an enzyme and/or acid treatment, and to a mechanical shearing treatment. The cellulose nanofibers have good dispersibility and can be dispersed in a water-soluble polymer at high concentration, and therefore a fiber reinforced composite material having high strength can be obtained.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: April 24, 2018
    Assignee: Nitto Boseki Co., Ltd.
    Inventors: Masanori Wada, Akira Yoshimura, Yoshihiko Amano
  • Publication number: 20180099625
    Abstract: In a glass chopped strand mat, a short chopped strand layer having first glass chopped strands with an average length of 25.4 to 76.2 mm and a long chopped strand layer having second glass chopped strands with an average length of 76.2 to 203.2 mm are laminated, a difference between the average length of the first glass chopped strands and that of the second glass chopped strands is 25.4 mm or greater, the short chopped strand layer occupies 50 to 70 parts by mass, and the long chopped strand layer occupies 30 to 50 parts by mass with respect to 100 parts by mass of the glass chopped strand mat, a mass per unit area of the glass chopped strand mat is 180 g/m2 or lower, and a loss on ignition of the glass chopped strand mat measured on the basis of JIS R 3420 is lower than 10%.
    Type: Application
    Filed: December 7, 2017
    Publication date: April 12, 2018
    Applicant: NITTO BOSEKI CO., LTD.
    Inventors: Mitsuhiro Omiya, Masatoshi Suzuki
  • Patent number: 9878942
    Abstract: Provided is a glass composition for glass fiber allowing spinning to be stably performed without mixing of red foreign substances into glass fibers. The glass composition for glass fiber includes, in relation to the total amount thereof, SiO2 in a content falling within a range from 57.0 to 60.0% by mass, Al2O3 in a content falling within a range from 17.5 to 20.0% by mass, MgO in a content falling within a range from 8.5 to 12.0% by mass, CaO in a content falling within a range from 10.0 to 13.0% by mass and B2O3 in a content falling within a range from 0.5 to 1.5% by mass, the total content of SiO2, Al2O3, MgO and CaO being 98.0% by mass or more.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: January 30, 2018
    Assignee: Nitto Boseki Co., Ltd.
    Inventors: Takashi Nonaka, Norio Hirayama, Kazuaki Minami, Yosuke Nukui
  • Publication number: 20170267782
    Abstract: The purpose of the present invention is to provide a monoclonal antibody that is useful in specifically assaying tartrate resistant acid phosphatase 5b (TRACP-5b). A hybridoma producing a monoclonal antibody against TRACP-5b, said monoclonal antibody showing higher reactivity with TRACP-5b than with tartrate resistant acid phosphatase 5a (TRACP-5a) and, therefore, being specific to TRACP-5b, is obtained by cell fusion using, as an antigen, human recombinant TRACP-5b purified from silkworm silk gland. By using this monoclonal antibody, TRACP-5b in a specimen can be highly sensitively and specifically detected.
    Type: Application
    Filed: August 7, 2015
    Publication date: September 21, 2017
    Applicant: NITTO BOSEKI CO., LTD.
    Inventors: Wataru KIKUCHI, Kumiko SASAGAWA, Kenta NODA
  • Publication number: 20170015257
    Abstract: In a glass chopped strand mat, a short chopped strand layer having first glass chopped strands with an average length of 25.4 to 76.2 mm and a long chopped strand layer having second glass chopped strands with an average length of 76.2 to 203.2 mm are laminated, a difference between the average length of the first glass chopped strands and that of the second glass chopped strands is 25.4 mm or greater, the short chopped strand layer occupies 50 to 70 parts by mass, and the long chopped strand layer occupies 30 to 50 parts by mass with respect to 100 parts by mass of the glass chopped strand mat, a mass per unit area of the glass chopped strand mat is 180 g/m2 or lower, and a loss on ignition of the glass chopped strand mat measured on the basis of JIS R 3420 is lower than 10%.
    Type: Application
    Filed: December 24, 2014
    Publication date: January 19, 2017
    Applicant: NITTO BOSEKI CO., LTD.
    Inventors: Mitsuhiro Omiya, Masatoshi Suzuki
  • Publication number: 20170008991
    Abstract: Provided are: a graft copolymer which can be safely and stably produced with simple operation, while maintaining the characteristics of an amine, and which is lower in the introduction cost than conventional graft copolymers; and a method for producing the graft copolymer. A polyamine graft polymer that is obtained by polymerizing a polyamine derivative, which is obtained by reacting a polymer compound (a) having at least one amino group with a compound (b) having at least one epoxy group, with an ethylenically unsaturated monomer (c). A method for producing a polyamine graft polymer, which comprises a step for adding, for polymerization, an ethylenically unsaturated monomer (c) and a radical polymerization initiator to a polyamine derivative, which is obtained by reacting a polymer compound (a) having at least one amino group with a compound (b) having at least one epoxy group, in a polar solvent.
    Type: Application
    Filed: February 27, 2015
    Publication date: January 12, 2017
    Applicant: NITTO BOSEKI CO., LTD.
    Inventors: Koji WATANABE, Masaru BUNYA
  • Publication number: 20160367979
    Abstract: The purpose of the present invention is to provide a method for separating and concentrating a target substance as an alternative to existing cationic polymers, and a kit for implementing this method.
    Type: Application
    Filed: February 27, 2015
    Publication date: December 22, 2016
    Applicant: NITTO BOSEKI CO., LTD.
    Inventors: Kazuho ASHIZAWA, Kenta NODA, Koji WATANABE, Yoko TERUUCHI, Masaru BUNYA
  • Publication number: 20160370382
    Abstract: An autoantibody against Ku86 can be measured by reacting the autoantibody contained in a sample with a Ku86 antigen (which serves as a reagent) to produce an immune complex of the autoantibody and the Ku86 antigen and measuring the immune complex using a labeled anti-human immunoglobulin antibody. The measurement of the autoantibody enables the determination of primary hepatocellular carcinoma.
    Type: Application
    Filed: July 22, 2016
    Publication date: December 22, 2016
    Applicant: NITTO BOSEKI CO., LTD.
    Inventors: Ryo KOJIMA, Kenta NODA, Masanori SEIMIYA, Kazuyuki SOGAWA, Fumio NOMURA
  • Patent number: 9512534
    Abstract: There is provided a method of well filling copper in a conductivity-rendered non-through hole having an aspect ratio (depth/hole diameter) of 5 or more on a substrate in a short period of time, and the method comprises using an acidic copper plating bath comprising a water-soluble copper salt, sulfuric acid, chlorine ion, a brightener and a copolymer of diallylamines and sulfur dioxide and filling copper in the non-through hole by periodic current reversal copper plating.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: December 6, 2016
    Assignees: OSAKA PREFECTURE UNIVERSITY PUBLIC CORPORATION, NITTO BOSEKI CO., LTD.
    Inventors: Kazuo Kondo, Takeyasu Saito, Naoki Okamoto, Masaru Bunya, Minoru Takeuchi
  • Publication number: 20160289117
    Abstract: Provided is a colored glass fiber for use as a reinforced fiber, allowing a molded product to have high strength and good appearance. A glass fiber is surface treated with a surface treatment agent including a first silane coupling agent, a coating agent and a surfactant, colored with a coloring agent including a second silane coupling agent and a pigment, and water-washed, so that the colored glass fiber is obtained. The treatment is performed to have a sum of the weight of a surface treatment layer and a colored layer of 0.25 to 1.70 wt% with respect to the weight of the glass fiber. Due to a coating formed from the surface treatment agent on the glass surface, the colored glass fiber is not scratched by the pigment contained in the coloring agent. Consequently, the mold product doesn't degrade the strength and has good appearance due to the coloring.
    Type: Application
    Filed: December 25, 2014
    Publication date: October 6, 2016
    Applicant: NITTO BOSEKI CO., LTD.
    Inventors: Hiroshi MORI, Satoshi MISHIMA, Tsunefumi AIZAWA, Nobumichi KOYAMA
  • Patent number: 9416235
    Abstract: Provided is a long-fiber-reinforced thermoplastic resin preform including glass fibers excellent in strength and modulus of elasticity and easily produced and a long-fiber-reinforced resin compact excellent in strength and modulus of elasticity. The long-fiber-reinforced thermoplastic resin preform is produced by cutting to a predetermined length glass fiber bundles impregnated with a thermoplastic resin and holding the thermoplastic resin around the glass fiber bundles, and includes the glass fiber bundles as long fiber bundles. The glass fiber bundles are formed by bundling glass fibers. The glass fibers have a composition wherein the content of SiO2 is 57.0 to 63.0% by mass, the content of Al2O3 is 19.0 to 23.0% by mass, the content of MgO is 10.0 to 15.0% by mass and the content of CaO is 5.5 to 11.0% by mass, and the ratio MgO/CaO is 0.8 to 2.0.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: August 16, 2016
    Assignee: Nitto Boseki Co., Ltd.
    Inventors: Takashi Nonaka, Hiroyasu Aihara