Patents by Inventor Takayuki Nagashimada

Takayuki Nagashimada 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).

  • EPOXY RESIN COMPOSITION
    Publication number: 20190023833
    Abstract: An object of the present invention is to provide an epoxy resin composition capable of forming a cured epoxy resin product that exhibits excellent initial transparency and weatherability and excellent adhesion to various substrates. The present invention relates to an epoxy resin composition containing (A) an epoxy resin, (B) a polycarboxylic anhydride containing a structural unit represented by formula (1), and (C) a specific phosphonium compound wherein A represents a cycloalkylene group and the like, R1 to R10 are identical or different and each represent a hydrogen atom or an optionally substituted C1-10 alkyl group, and two groups of R1 to R10 may be taken together to form a divalent group.
    Type: Application
    Filed: January 18, 2017
    Publication date: January 24, 2019
    Applicant: NEW JAPAN CHEMICAL CO., LTD.
    Inventors: Takayuki Nagashimada, Eriko Harada
  • Polycarboxylic acid anhydride and use thereof
    Patent number: 9873762
    Abstract: The present invention relates to a polycarboxylic acid anhydride having a structural unit represented by the following Formula (1). The present invention provides a novel polycarboxylic acid anhydride. When the polycarboxylic acid anhydride is used, for example, as an epoxy resin-curing agent, the balance of the composition of the resin composition is stabilized, and a resin molded article having excellent heat resistance, transparency, thermal yellowing resistance, surface hardness, solvent resistance, flexibility, and adhesiveness is thus provided.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: January 23, 2018
    Assignee: NEW JAPAN CHEMICAL CO., LTD.
    Inventors: Hideyuki Yoshikawa, Takayuki Nagashimada, Maiko Yamazaki, Eriko Harada, Taiki Tsuji, Masahiko Yamanaka, Taro Yamazaki
  • NOVEL POLYCARBOXYLIC ACID ANHYDRIDE AND USE THEREOF
    Publication number: 20160075819
    Abstract: The present invention relates to a polycarboxylic acid anhydride having a structural unit represented by the following Formula (1). The present invention provides a novel polycarboxylic acid anhydride. When the polycarboxylic acid anhydride is used, for example, as an epoxy resin-curing agent, the balance of the composition of the resin composition is stabilized, and a resin molded article having excellent heat resistance, transparency, thermal yellowing resistance, surface hardness, solvent resistance, flexibility, and adhesiveness is thus provided.
    Type: Application
    Filed: April 18, 2014
    Publication date: March 17, 2016
    Applicant: NEW JAPAN CHEMICAL CO., LTD.
    Inventors: Hideyuki Yoshikawa, Takayuki Nagashimada, Maiko Yamazaki, Eriko Harada, Taiki Tsuji, Masahiko Yamanaka, Taro Yamazaki