Patents by Inventor Nobuyuki Mitarai

Nobuyuki Mitarai 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).

  • Patent number: 8840830
    Abstract: There is provided a method of molding which is capable of more highly precisely molding a molded article to be molded such as a lens than conventional technologies. A molded article such as a lens array and a mold for nanoimprinting is molded by repeating multiple times a transfer step including: a transformation step of bringing a light curable composition containing a compound having a polymerizable functional group and a polymerization initiator into contact with a transfer member 62 on which a transfer shape portion shaped equally to or reversely to an aspherical lens portion 312 is formed to transform the light curable composition to the transfer shape of the transfer member 62; a curing step of irradiating at least a transformed portion of the transformed light curable composition with light by a light irradiation unit 60 to cure the light curable composition; and a separation step of separating the cured light curable composition and the transfer member.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: September 23, 2014
    Assignee: AJI Co., Ltd.
    Inventors: Shigeru Yamaki, Hideo Miyata, Nobuyuki Mitarai, Nobuaki Ishii, Katsumi Murofushi, Kunio Yoshida
  • Publication number: 20120010361
    Abstract: The present invention provides a curable composition having a proper viscosity and excellent handling properties, and a cured product that is obtainable by curing the curable composition and has excellent transparency, heat resistance and resistance to environment and a low Abbe's number, and further can effectively decrease chromatic aberration by the combined use with a material having a high Abbe's number. The curable composition is characterized by comprising (a) silica fine particles, (b) a (meth)acrylate compound having at least two ethylenic unsaturated groups and having no ring structure, (c) a (meth)acrylate compound having at least two ethylenic unsaturated groups and having an aromatic ring structure and (d) a polymerization initiator, wherein the silica particles (a) are surface treated by a specific silane compound (e) and a specific silane compound (f).
    Type: Application
    Filed: March 10, 2010
    Publication date: January 12, 2012
    Applicant: SHOWA DENKO K.K.
    Inventors: Yoshifumi Urakawa, Shigeru Yamaki, Hideo Miyata, Nobuyuki Mitarai, Saori Yamaki, Nobuaki Ishii
  • Publication number: 20110227239
    Abstract: There is provided a method of molding which is capable of more highly precisely molding a molded article to be molded such as a lens than conventional technologies. A molded article such as a lens array and a mold for nanoimprinting is molded by repeating multiple times a transfer step including: a transformation step of bringing a light curable composition containing a compound having a polymerizable functional group and a polymerization initiator into contact with a transfer member 62 on which a transfer shape portion shaped equally to or reversely to an aspherical lens portion 312 is formed to transform the light curable composition to the transfer shape of the transfer member 62; a curing step of irradiating at least a transformed portion of the transformed light curable composition with light by a light irradiation unit 60 to cure the light curable composition; and a separation step of separating the cured light curable composition and the transfer member.
    Type: Application
    Filed: November 19, 2009
    Publication date: September 22, 2011
    Applicants: SHOWA DENKO K.K., AJI CO., LTD
    Inventors: Shigeru Yamaki, Hideo Miyata, Nobuyuki Mitarai, Nobuaki Ishii, Katsumi Murofushi, Kunio Yoshida
  • Publication number: 20110112243
    Abstract: The invention has an object of providing paint compositions showing excellent performances in both scratch resistance and impact resistance, and processes for forming multilayer paint films using the paint composition. The invention has another object of providing paint compositions suitably used as clear paints for finish painting automobiles and the like, and highly solidifiable paint compositions. A paint composition according to the invention includes a polyisocyanate prepolymer (A) including a monomer unit of Formula (1) below and a polyol (B), and has an average functional group equivalent weight of 160 to 400 g/eq. A process for forming multilayer paint films involves the paint composition. wherein R1 is a hydrogen atom or a methyl group; n is an integer of 0 or 1; when n=0, l=0, p=1 and m is an integer of 1 to 8; and when n=1, m=2, l=2 and p is an integer of 1 to 4.
    Type: Application
    Filed: June 24, 2009
    Publication date: May 12, 2011
    Applicant: SHOWA DENKO K.K.
    Inventors: Nobuaki Ishii, Katsuro Urakawa, Nobuyuki Mitarai, Katsumi Murofushi
  • Publication number: 20110098411
    Abstract: An object of the present invention is to provide a curable composition which has excellent handling properties and which is able to form a cured product excellent in transparency, heat resistance, environment resistance and molding processability. The curable composition of the present invention comprises (a) silica fine particles, (b) a (meth)acrylate having at least two ethylenic unsaturated groups and no ring structure, (c) a (meth)acrylate having an ethylenic unsaturated group and an alicyclic structure, and (d) a polymerization initiator, said silica fine particles (a) are surface-treated with a silane compound (e) represented by the following general formula (1) and a silane compound (f) represented by the following general formula (2).
    Type: Application
    Filed: June 30, 2009
    Publication date: April 28, 2011
    Applicant: SHOWA DENKO K.K.
    Inventors: Shigeru Yamaki, Hideo Miyata, Nobuyuki Mitarai, Nobuaki Ishii, katsumi Kurofushi
  • Patent number: 7875679
    Abstract: A polypropylene resin composition comprising 40 to 80% of a polypropylene component (A) comprising a copolymer of propylene with ethylene and/or a C4-12 ?-olefin, or a homopolymer of propylene, and 20 to 60% of a copolymer component (B) containing copolymer (B-1) and copolymer (B-2), wherein both (B-1) and (B-2) are copolymers of propylene with ethylene and/or a C4-12 ?-olefin, in (B-1) the amount of units derived from propylene is more than 50% to 85%, and in (B-2) the amount of units derived from propylene is 15 to 50%, the molecular weight distribution is 3.0 or less, and blockness is 1.3 or less; in which composition the amount of (B-2) is 3% or more, and the ratio of the limiting viscosity of (B-1) to the viscosity of (A). is 1.5 or less, and the ratio of the limiting viscosity of (B-1) to the viscosity of (B-2) is 0.8 or more.
    Type: Grant
    Filed: March 10, 2003
    Date of Patent: January 25, 2011
    Assignee: Bassell Poliolefine Italia S.p.A.
    Inventors: Tetsuya Fudaba, Nobuyuki Mitarai, Katsuharu Tagashira
  • Publication number: 20100087611
    Abstract: It is an object of the present invention to provide a urethane compound capable of providing a cured product which is excellent in surface hardness, scratch resistance, flexibility and bending property, has reduced curling property and also has good transparency, a curable composition containing the same and a cured product thereof. The curable composition of the present invention is characterized by containing a specific urethane compound having an isocyanurate ring skeleton and a polymerization initiator.
    Type: Application
    Filed: April 24, 2008
    Publication date: April 8, 2010
    Applicant: SHOWA DENKO K.K.
    Inventors: Yoshifumi Urakawa, Nobuaki Ishii, Nobuyuki Mitarai, Yotaro Hattori, Hiroko Oi, Katsumi Murofushi
  • Publication number: 20050165166
    Abstract: A polypropylene resin composition comprising 40 to 80% of a polypropylene component (A) comprising a copolymer of propylene with ethylene and/or a C4-12 ?-olefin, or a homopolymer of propylene, and 20 to 60% of a copolymer component (B) containing a copolymer (B-1) and a copolymer (B-2), wherein both (B-1) and (B-2) are copolymers of propylene with ethylene and/or a C4-12 ?-olefin, in (B-1) the amount of units derived from propylene is more than 50% to 85%, and in (B-2) the amount of units derived from propylene is 15 to 50%, the molecular weight distribution is 3.0 or less, and blockness is 1.3 or less; in which composition the amount of (B-2) is 3% or more, and the ratio of the limiting viscosity of (B-1) to the viscosity of (A) is 1.5 or less, and the ratio of the limiting viscosity of (B-1) to the viscosity of (B-2) is 0.8 or more.
    Type: Application
    Filed: March 10, 2003
    Publication date: July 28, 2005
    Inventors: Tetsuya Fudaba, Nobuyuki Mitarai, Katsuharu Tagashira
  • Patent number: 5354618
    Abstract: A thermoplastic resin composition having good coating affinity is disclosed, which comprises (a) from 20 to 80 parts by weight of a resin component containing a modified polyolefin resin which has been graft-modified with an unsaturated hydroxy group-containing compound or an unsaturated carboxylic acid, (b) from 80 to 20 pats by weight of a rubber component containing a copolymer rubber, and (c) a functional group-terminated oligomer in an amount of from 0.1 to 20 parts by weight per 100 parts by weight of the sum of components (a) and (b).
    Type: Grant
    Filed: March 25, 1993
    Date of Patent: October 11, 1994
    Assignee: Showa Denko K.K.
    Inventors: Satoru Ishigaki, Yutaka Yokoyama, Yukihiro Hisanaga, Zenichiro Izumi, Nobuyuki Mitarai, Kouichi Yamamoto