Patents by Inventor Takamasa Akizuki

Takamasa Akizuki 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: 20200325329
    Abstract: The present invention provides a polyarylate resin which is excellent in heat-resisting properties, abrasion-resisting properties, solubility properties in non-halogenated organic solvents, a water vapor-barrier property, mechanical properties, liquid sag-resisting properties and deformation-resisting properties (such as adhesive properties). The present invention relates to a polyarylate resin comprising a dihydric phenol residue shown in general formula (1) and an aromatic dicarboxylic acid residue shown in general formula (2), a film comprising the same and a laminated product thereof: (wherein X represents a liner or branched bivalent hydrocarbon group having 4 to 8 carbon atoms.) (wherein R1 and R2 respectively and independently represent a monovalent hydrocarbon group having 1 to 6 carbon atoms, which may be substituted by one or more halogen atoms, or a halogen atom, and p and q respectively and independently represent an integer of 0 to 4.).
    Type: Application
    Filed: May 23, 2017
    Publication date: October 15, 2020
    Applicant: UNITIKA LTD.
    Inventors: Akira MURATA, Takamasa AKIZUKI, Chiho MATSUMOTO, Keita HAGIWARA
  • Patent number: 9862800
    Abstract: An object of the present invention is to provide a polyarylate resin having an adequate ultraviolet-absorbing property and an adequate dissolving property in an organic solvent, which is excellent in a solution stability even when it is dissolved in a polar organic solvent having a high hygroscopic property and in a reactivity with the other material and adhesive properties to various materials. The present invention provides a polyarylate resin comprising a bisphenol component including a compound shown by a general formula (1) and an aromatic dicarboxylic acid component as monomeric components, wherein the polyarylate resin is satisfied with the formula mentioned below: ?B/?A?0.95 (wherein ?A represents an inherent viscosity measured in a concentration of 1 g/dL and a temperature of 25° C. using tetrachloroethane as a solvent and ?B represents an inherent viscosity measured in a concentration of 1 g/dL and a temperature of 25° C.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: January 9, 2018
    Assignee: UNITIKA LTD.
    Inventors: Chiho Matsumoto, Takamasa Akizuki
  • Patent number: 9365673
    Abstract: The polyarylate resin of the present invention includes a bisphenol residue represented by the general formula (1) and an aromatic dicarboxylic acid residue represented by the general formula (2). In formula (1), R1 and R2 each independently represent a hydrocarbon group having 1 to 6 carbon atoms, a halogenated alkyl group or a halogen atom, p and q each independently represent an integer of 0 to 4, and X represents a fluorine atom-containing divalent group. In formula (2), R3 and R4 each independently represent a hydrocarbon group having 1 to 6 carbon atoms, a halogenated alkyl group or a halogen atom, and r and s each independently represent an integer of 0 to 4.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: June 14, 2016
    Assignee: Unitika Ltd.
    Inventors: Chiho Matsumoto, Takamasa Akizuki
  • Publication number: 20160159975
    Abstract: An object of the present invention is to provide a polyarylate resin having an adequate ultraviolet-absorbing property and an adequate dissolving property in an organic solvent, which is excellent in a solution stability even when it is dissolved in a polar Organic solvent having a high hygroscopic property and in a reactivity with the other material and adhesive properties to various materials. The present invention provides a polyarylate resin comprising a bisphenol component including a compound shown by a general formula (1) and an aromatic dicarboxylic acid component as monomeric components, wherein the polyarylate resin is satisfied with the formula mentioned below: ?B/?A?0.95 (wherein ?A represents an inherent viscosity measured in a concentration of 1 g/dL and a temperature of 25° C. using tetrachloroethane as a solvent and ?B represents an inherent viscosity measured in a concentration of 1 g/dL and a temperature of 25° C.
    Type: Application
    Filed: August 8, 2014
    Publication date: June 9, 2016
    Applicant: UNITIKA LTD.
    Inventors: Chiho MATSUMOTO, Takamasa AKIZUKI
  • Publication number: 20150175742
    Abstract: The polyarylate resin of the present invention includes a bisphenol residue represented by the general formula (1) and an aromatic dicarboxylic acid residue represented by the general formula (2). In formula (1), R1 and R2 each independently represent a hydrocarbon group having 1 to 6 carbon atoms, a halogenated alkyl group or a halogen atom, p and q each independently represent an integer of 0 to 4, and X represents a fluorine atom-containing divalent group. In formula (2), R3 and R4 each independently represent a hydrocarbon group having 1 to 6 carbon atoms, a halogenated alkyl group or a halogen atom, and r and s each independently represent an integer of 0 to 4.
    Type: Application
    Filed: August 2, 2013
    Publication date: June 25, 2015
    Applicant: UNITIKA LTD.
    Inventors: Chiho Matsumoto, Takamasa Akizuki