Patents by Inventor Taichi Nakazawa

Taichi Nakazawa 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: 10720584
    Abstract: Provided are: a charge-transporting varnish that contains a charge-transporting substance comprising an oligoaniline derivative represented by formula (1), a charge transporting substance that does not contain fluorine atoms, and an organic solvent; and an organic electroluminescent element including a thin film obtained from the varnish. (In the formula: R1 represents a hydrogen atom or an alkyl group that may be substituted; R2 to R10 each independently represent a hydrogen atom, a halogen atom, a nitro group, a cyano group, or an alkyl group, alkenyl group, alkynyl group, aryl group or heteroaryl group that may be substituted; A represents a prescribed fluorine atom-containing substituent; and k represents an integer from 1 to 20.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: July 21, 2020
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Toshiyuki Endo, Taichi Nakazawa
  • Patent number: 10700283
    Abstract: Aniline derivatives such as those represented by the formula shown, for example, have good solubility with respect to organic solvents, and are able to provide an organic electroluminescent element having excellent luminance characteristics when a thin film containing said aniline derivatives is used as a charge transporting substance in a hole injection layer. (In the formula, DPA represents a diphenylamino group.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: June 30, 2020
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Naoki Nakaie, Taichi Nakazawa
  • Patent number: 10655000
    Abstract: An organic/inorganic composite hydrogel can be prepared only through mixing at a room temperature and that has high modulus of elasticity and a self-supporting property that allows a shape to be maintained in water, and a method produces the hydrogel. A hydrogel forming composition that is capable of forming a hydrogel having a self-supporting property, includes: a water-soluble organic polymer having an organic acid structure, an organic acid salt structure, or an organic acid anion structure; a silicate salt; a dispersant for the silicate salt; and a compound having or generating divalent or higher valent positive charge; a hydrogel formed of the composition, and a method for producing the hydrogel.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: May 19, 2020
    Assignees: NISSAN CHEMICAL INDUSTRIES, LTD., RIKEN
    Inventors: Yoshihiro Kudo, Taichi Nakazawa, Takuzo Aida, Yasuhiro Ishida, Shingo Tamesue, Masataka Ohtani
  • Patent number: 10590287
    Abstract: Provided is a charge-transporting varnish which comprises an amide compound containing fluorine atoms and represented by formula (1) and a charge-transporting substance. [In the formula, Ar1 represents a group represented by any of formulae (1-1) to (1-9) and Ar2 and Ar3 each represent a given fluorinated aryl or aralkyl group.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: March 17, 2020
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Taichi Nakazawa, Toshiyuki Endo, Yuki Takayama
  • Publication number: 20200040137
    Abstract: provided is a composition containing electron-donating polymer (D) having a structure represented by the following formula (1), and electron-withdrawing polymer (A) having a structure represented by the following formula (2): wherein definition of the symbols are as described in the DESCRIPTION.
    Type: Application
    Filed: October 3, 2017
    Publication date: February 6, 2020
    Applicants: NISSAN CHEMICAL CORPORATION, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Masamichi NISHIHARA, Shiyan FENG, Liana CHRISTIANI, Kazunari SASAKI, Shoichi KONDO, Takahiro KASEYAMA, Taichi NAKAZAWA, Takamasa KIKUCHI
  • Patent number: 10336686
    Abstract: Provided is a fluorine atom-containing compound represented by formula (1) below (In the formula, Z represents a predetermined divalent group, each Ar independently represents a predetermined aromatic ring-containing group, and each ArF independently represents a predetermined fluorine atom-containing aryl group).
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: July 2, 2019
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Taichi Nakazawa, Toshiyuki Endo
  • Patent number: 10211412
    Abstract: The invention provides a charge-transporting varnish, containing a charge-transporting substance formed of an indolocarbazole represented by the following formula (1), a dopant substance, and an organic solvent.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: February 19, 2019
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Taichi Nakazawa, Shoji Moriyama
  • Publication number: 20190031600
    Abstract: Provided is a fluorine atom-containing compound represented by formula (1) below (In the formula, Z represents a predetermined divalent group, each Ar independently represents a predetermined aromatic ring-containing group, and each ArF independently represents a predetermined fluorine atom-containing aryl group).
    Type: Application
    Filed: January 11, 2017
    Publication date: January 31, 2019
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Taichi NAKAZAWA, Toshiyuki ENDO
  • Patent number: 10193075
    Abstract: Aniline derivatives such as are represented by, e.g., the formula have excellent solubility in organic solvents and make it possible to obtain an organic EL element having exceptional brightness characteristics when a thin film containing these derivatives as a charge transport material is applied to a hole injection layer.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: January 29, 2019
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Naoki Nakaie, Taichi Nakazawa
  • Patent number: 10164196
    Abstract: Provided is an aniline derivative represented by formula (1). (In formula (1), R1 represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group having 6-20 carbon atoms, a heteroaryl group, or a group represented by formula (2), and R2-R55 independently represent a hydrogen atom, a halogen atom, a nitro group, a cyano group, an aldehyde group, a hydroxy group, a thiol group, a carboxylic acid group, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, etc.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: December 25, 2018
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Naoki Nakaie, Taichi Nakazawa
  • Patent number: 10153439
    Abstract: A charge transport material containing a charge transport substance that is composed of a compound represented by formula (1) and another charge transport substance that is composed of a charge transport compound having a molecular weight of 200-9,000 exhibits good solubility in an organic solvent. A charge transport varnish, from which a charge transport thin film having excellent charge transport properties, flatness and uniformity is formed with good reproducibility, is able to be prepared by dissolving the above-described charge transport material in an organic solvent.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: December 11, 2018
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Naoki Nakaie, Taichi Nakazawa
  • Patent number: 10147885
    Abstract: Aniline derivatives such as those represented by the formulas shown, for example, have good solubility in organic solvents, and are able to provide organic electroluminescent elements having excellent longevity when thin films containing said aniline derivatives as charge transporting substances are used for hole injection layers.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: December 4, 2018
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Naoki Nakaie, Taichi Nakazawa, Seiya Terai
  • Publication number: 20180240974
    Abstract: Aniline derivatives such as those represented by the formulas shown, for example, have good solubility in organic solvents, and are able to provide organic electroluminescent elements having excellent longevity when thin films containing said aniline derivatives as charge transporting substances are used for hole injection layers.
    Type: Application
    Filed: February 17, 2016
    Publication date: August 23, 2018
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Naoki NAKAIE, Taichi NAKAZAWA, Seiya TERAI
  • Publication number: 20180163061
    Abstract: Provided is a charge-transporting varnish which comprises an amide compound containing fluorine atoms and represented by formula (1) and a charge-transporting substance. [In the formula, Ar1 represents a group represented by any of formulae (1-1) to (1-9) and Ar2 and Ar3 each represent a given fluorinated aryl or aralkyl group.
    Type: Application
    Filed: June 10, 2016
    Publication date: June 14, 2018
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Taichi NAKAZAWA, Toshiyuki ENDO, Yuki TAKAYAMA
  • Publication number: 20180151805
    Abstract: Provided are: a charge-transporting varnish that contains a charge-transporting substance comprising an oligoaniline derivative represented by formula (1), a charge transporting substance that does not contain fluorine atoms, and an organic solvent; and an organic electroluminescent element including a thin film obtained from the varnish. (In the formula: R1 represents a hydrogen atom or an alkyl group that may be substituted; R2 to R10 each independently represent a hydrogen atom, a halogen atom, a nitro group, a cyano group, or an alkyl group, alkenyl group, alkynyl group, aryl group or heteroaryl group that may be substituted; A represents a prescribed fluorine atom-containing substituent; and k represents an integer from 1 to 20.
    Type: Application
    Filed: May 25, 2016
    Publication date: May 31, 2018
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Toshiyuki ENDO, Taichi NAKAZAWA
  • Patent number: 9780309
    Abstract: A triphenylamine derivative represented by formula (1) exhibits good solubility in an organic solvent and allows an organic EL element having excellent luminance characteristics to be achieved when formed into a thin film and applied to a positive hole injection layer. (In the formula, R1 to R17 mutually independently represent a hydrogen atom, a halogen atom, a nitro group, a cyano group, an amino group, an aldehyde group, a hydroxyl group, a thiol group, a carboxylic acid group, and the like; and l, m, and n mutually independently represent an integer 1 to 5.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: October 3, 2017
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Naoki Nakaie, Taichi Nakazawa
  • Publication number: 20170213986
    Abstract: A charge transport material containing a charge transport substance that is composed of a compound represented by formula (1) and another charge transport substance that is composed of a charge transport compound having a molecular weight of 200-9,000 exhibits good solubility in an organic solvent. A charge transport varnish, from which a charge transport thin film having excellent charge transport properties, flatness and uniformity is formed with good reproducibility, is able to be prepared by dissolving the above-described charge transport material in an organic solvent.
    Type: Application
    Filed: July 21, 2015
    Publication date: July 27, 2017
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Naoki NAKAIE, Taichi NAKAZAWA
  • Publication number: 20170155060
    Abstract: The invention provides a charge-transporting varnish, containing a charge-transporting substance formed of an indolocarbazole represented by the following formula (1), a dopant substance, and an organic solvent.
    Type: Application
    Filed: July 9, 2015
    Publication date: June 1, 2017
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Taichi NAKAZAWA, Shoji MORIYAMA
  • Publication number: 20170012213
    Abstract: An aniline derivative represented by the formula, for instance, has good solubility in organic solvents, and when a thin film comprising such derivative as a charge-transporting substance is used in a hole injection layer, an organic EL element having excellent luminance characteristics can be obtained.
    Type: Application
    Filed: March 11, 2015
    Publication date: January 12, 2017
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Naoki NAKAIE, Taichi NAKAZAWA
  • Publication number: 20170005271
    Abstract: Aniline derivatives such as are represented by, e.g., the formula have excellent solubility in organic solvents and make it possible to obtain an organic EL element having exceptional brightness characteristics when a thin film containing these derivatives as a charge transport material is applied to a hole injection layer.
    Type: Application
    Filed: March 11, 2015
    Publication date: January 5, 2017
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Naoki NAKAIE, Taichi NAKAZAWA