Patents by Inventor Katsuya Tomizawa

Katsuya Tomizawa 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: 20180186952
    Abstract: A resin composition containing a compound represented by the following general formula (a) or the following general formula (b), an alkenyl-substituted nadimide compound, and a maleimide compound: wherein Ra represents a group represented by the following general formula (c),
    Type: Application
    Filed: July 4, 2016
    Publication date: July 5, 2018
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Yoichi TAKANO, Katsuya TOMIZAWA, Takashi KUBO, Tomo CHIBA, Eisuke SHIGA
  • Publication number: 20180186933
    Abstract: The present invention provides a resin composition containing an allyl group-containing compound (A) and a maleimide compound (B), in which the allyl group-containing compound (A) has a reactive functional group other than an allyl group.
    Type: Application
    Filed: July 4, 2016
    Publication date: July 5, 2018
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Naoki KASHIMA, Katsuya TOMIZAWA, Meguru ITO, Tomoki HAMAJIMA, Eisuke SHIGA, Kentaro TAKANO, Shota KOGA
  • Publication number: 20180179355
    Abstract: It is intended to provide a resin composition that suppresses the thermal expansion of a printed circuit board more than ever and also prevents the bleedout of substances from the printed circuit board, while maintaining a high glass transition temperature. The resin composition of the present invention contains an alkenyl-substituted nadimide, a maleimide compound, and an epoxy-modified cyclic silicone compound.
    Type: Application
    Filed: July 4, 2016
    Publication date: June 28, 2018
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Katsuya TOMIZAWA, Tomoki HAMAJIMA, Shohei YAMAGUCHI, Eisuke SHIGA, Meguru ITO
  • Publication number: 20180179353
    Abstract: The resin composition of the present invention comprises an alkenyl-substituted nadimide (A), a maleimide compound (B), and an amino-modified silicone (C).
    Type: Application
    Filed: July 4, 2016
    Publication date: June 28, 2018
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Yoichi TAKANO, Nobuyoshi OHNISHI, Katsuya TOMIZAWA, Naoki KASHIMA, Hiroshi TAKAHASHI, Eisuke SHIGA
  • Publication number: 20180179354
    Abstract: The present invention provides a resin composition containing an alkenyl-substituted nadimide and a perinone-based colorant, wherein the content of the perinone-based colorant is 0.8 parts by mass or less based on 100 parts by mass in total of resin-constituting components in the resin composition.
    Type: Application
    Filed: July 4, 2016
    Publication date: June 28, 2018
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Katsuya TOMIZAWA, Eisuke SHIGA, Meguru ITO, Tomo CHIBA
  • Publication number: 20180163048
    Abstract: It is intended to provide a method for producing a printed circuit board capable of enhancing the adhesion between the inorganic filler-containing insulating layer and the conductor layer of a printed circuit board. The method for producing a printed circuit board of the present invention is a method for producing a printed circuit board, having an alkali treatment step of bringing a surface of an insulating layer for a printed circuit board into contact with an aqueous alkali solution, and a conductor layer forming step of forming a conductor layer on at least a part of the surface of the insulating layer that has undergone the alkali treatment step, wherein the insulating layer contains a resin composition containing a thermosetting resin, a silane compound having a (meth)acrylic skeleton and a hydrolyzable group or a hydroxy group, and an inorganic filler.
    Type: Application
    Filed: July 4, 2016
    Publication date: June 14, 2018
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Katsuya TOMIZAWA, Hiroshi TAKAHASHI, Eisuke SHIGA
  • Publication number: 20180155514
    Abstract: It is intended to provide a resin composition that serves as a raw material for a printed circuit board excellent in heat resistance after moisture absorption and is excellent in moldability. The resin composition of the present invention contains a maleimide compound, a silane compound having a carbon-carbon unsaturated bond and a hydrolyzable group or a hydroxy group, a silane compound having an epoxy skeleton and a hydrolyzable group or a hydroxy group, and an inorganic filler.
    Type: Application
    Filed: July 4, 2016
    Publication date: June 7, 2018
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Katsuya TOMIZAWA, Yoichi TAKANO, Meguru ITO, Eisuke SHIGA
  • Patent number: 9902851
    Abstract: A resin composition containing a cyclic epoxy-modified silicone compound (A) represented by formula (1), a cyanic acid ester compound (B) and/or a phenol resin (C) and an inorganic filler (D): wherein Ra each independently represent an organic group having an epoxy group; Rb each independently represent a substituted or unsubstituted monovalent hydrocarbon group; x represents an integer of 0 to 2; and y represents an integer of 1 to 6; and the siloxane unit marked with x and the siloxane unit marked with y are arranged mutually at random.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: February 27, 2018
    Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Hiroshi Takahashi, Tomo Chiba, Nobuyoshi Ohnishi, Katsuya Tomizawa, Keisuke Takada, Eisuke Shiga, Takaaki Ogashiwa
  • Publication number: 20160309582
    Abstract: The present invention provides an insulating layer for printed circuit boards having a difference of within 20% between the flexural modulus at 25° C. and the flexural modulus under heat at 250° C.
    Type: Application
    Filed: January 6, 2015
    Publication date: October 20, 2016
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Katsuya TOMIZAWA, Tomo CHIBA, Meguru ITO, Eisuke SHIGA
  • Publication number: 20150344733
    Abstract: The present invention provides a resin composition including: nanoparticles (A) of alumina and/or boehmite having an average particle size of 1.0 nm to 100 nm; fine particles (B) having an average particle size of 0.20 ?m to 100 ?m; and a thermosetting resin (C), wherein the nanoparticles (A) have their surfaces treated with a polysiloxane-based modifier.
    Type: Application
    Filed: January 14, 2014
    Publication date: December 3, 2015
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Katsuya TOMIZAWA, Tomo CHIBA, Hiroshi TAKAHASHI, Eisuke SHIGA, Daisuke UEYAMA, Kentaro NOMIZU
  • Publication number: 20150267047
    Abstract: A resin composition containing a cyclic epoxy-modified silicone compound (A) represented by formula (1), a cyanic acid ester compound (B) and/or a phenol resin (C) and an inorganic filler (D): wherein Ra each independently represent an organic group having an epoxy group; Rb each independently represent a substituted or unsubstituted monovalent hydrocarbon group; x represents an integer of 0 to 2; and y represents an integer of 1 to 6; and the siloxane unit marked with x and the siloxane unit marked with y are arranged mutually at random.
    Type: Application
    Filed: October 18, 2013
    Publication date: September 24, 2015
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Hiroshi Takahashi, Tomo Chiba, Nobuyoshi Ohnishi, Katsuya Tomizawa, Keisuke Takada, Eisuke Shiga, Takaaki Ogashiwa