Patents by Inventor Toshitsugu Kiyosada

Toshitsugu Kiyosada 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: 20210008791
    Abstract: A photo-curable resin composition for three-dimensional molding which does not require a support material is provided and can be cured by light irradiation while being extruded from a nozzle through a simple FDM method to be stacked and molded in a short period of time. The photo-curable resin composition has a viscosity at 20° C. of 0.2 Pa·s or more and a viscosity at 150° C. of 1000 Pa·s or less.
    Type: Application
    Filed: June 24, 2019
    Publication date: January 14, 2021
    Applicant: KJ CHEMICALS CORPORATION
    Inventors: Yoshio KUNIHIRO, Yuya ISHIMARU, Toshitsugu KIYOSADA
  • Publication number: 20200384696
    Abstract: An active energy ray-curable resin composition for three-dimensional molding support materials is provided and includes 0.1 to 90% by mass of a non-polymerizable compound (A) in which inorganic groups/organic groups (I/O value) equals 0.4 to 1.8, and 10 to 99.9% by mass of a polymerizable compound (B) in which inorganic groups/organic groups (I/O value) equals 0.8 to 3.0. By using the active energy ray-curable resin composition, an ink for a support material having well-balanced inorganicity and organicity is obtained, and by using the ink, the support material is easily removed from a roughly molded product without corrosion of ink tanks, ink ejection heads, and similar objects, and a large-sized and highly accurate three-dimensional molded product is obtained.
    Type: Application
    Filed: July 18, 2019
    Publication date: December 10, 2020
    Applicant: KJ CHEMICALS CORPORATION
    Inventors: Meiri HIRATA, Kouhei SATOU, Toshitsugu KIYOSADA
  • Patent number: 10711149
    Abstract: An object of the present invention is to provide a shape supporting support material which can be efficiently removed after molding in addition manufacturing and an active energy ray-curable resin composition used for forming the support material. An active energy ray-curable resin composition containing the ionic monomer (A), the nonionic water-soluble monomer (B), the nonpolymerizable compound (C), and the photopolymerization initiator (D), and/or the polyfunctional monomer (E) is used. The support material can be thereby efficiently removed from the formed roughly modeled product. Furthermore, a three-dimensional modeled product having a non-contaminated surface and high molding accuracy can be obtained.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: July 14, 2020
    Assignee: KJ CHEMICALS CORPORATION
    Inventor: Toshitsugu Kiyosada
  • Patent number: 10286598
    Abstract: A method for manufacturing a three-dimensional molded product capable of performing support at high accuracy using a support material having sufficient hardness and rigidity, capable of removing the support material efficiently after molding, and requiring no finishing step in manufacturing a three-dimensional molded product by an inkjet optical molding method, and a three-dimensional molded product manufactured by this method. A roughly molded product formed from a model material forming a molded product and a support material supporting the shape of the model material during molding is immersed in a washing liquid. The support material swells at a swelling ratio of 10% or more, and is thereby peeled from an interface with the model material having a swelling ratio of 1% or less. Then, the support material is easily and completely removed without applying an external force. Furthermore, a three-dimensional molded product can be manufactured with high accuracy and high efficiency.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: May 14, 2019
    Assignees: KJ CHEMICALS CORPORATION, MIMAKI ENGINEERING CO., LTD.
    Inventor: Toshitsugu Kiyosada
  • Publication number: 20180291219
    Abstract: An object of the present invention is to provide a shape supporting support material which can be efficiently removed after molding in addition manufacturing and an active energy ray-curable resin composition used for forming the support material. An active energy ray-curable resin composition containing the ionic monomer (A), the nonionic water-soluble monomer (B), the nonpolymerizable compound (C), and the photopolymerization initiator (D), and/or the polyfunctional monomer (E) is used. The support material can be thereby efficiently removed from the formed roughly modeled product. Furthermore, a three-dimensional modeled product having a non-contaminated surface and high molding accuracy can be obtained.
    Type: Application
    Filed: January 20, 2016
    Publication date: October 11, 2018
    Applicant: KJ CHEMICALS CORPORATION
    Inventor: Toshitsugu KIYOSADA
  • Publication number: 20180264716
    Abstract: A method for manufacturing a three-dimensional molded product capable of performing support at high accuracy using a support material having sufficient hardness and rigidity, capable of removing the support material efficiently after molding, and requiring no finishing step in manufacturing a three-dimensional molded product by an inkjet optical molding method, and a three-dimensional molded product manufactured by this method. A roughly molded product formed from a model material forming a molded product and a support material supporting the shape of the model material during molding is immersed in a washing liquid. The support material swells at a swelling ratio of 10% or more, and is thereby peeled from an interface with the model material having a swelling ratio of 1% or less. Then, the support material is easily and completely removed without applying an external force. Furthermore, a three-dimensional molded product can be manufactured with high accuracy and high efficiency.
    Type: Application
    Filed: February 3, 2016
    Publication date: September 20, 2018
    Applicants: KJ CHEMICALS CORPORATION, MIMAKI ENGINEERING CO., LTD.
    Inventor: Toshitsugu KIYOSADA
  • Patent number: 7482417
    Abstract: A novel (meth)acrylamide polymer capable of forming a papermaking chemical exhibiting an excellent paper strengthening effect, drainage improvement effect, retention improvement effect, plybond strength enhancing effect, surface strength enhancing effect, and sizing improvement effect in acid, neutral, or alkaline papermaking systems, as well as a method for manufacturing this polymer, and paper that makes use of this polymer and has excellent bursting strength, internal bond strength, and other such properties is provided. This is a (meth)acrylamide polymer produced by polymerizing a monomer (a) expressed by the following general formula 1, the following monomer (b), and the following monomer (c): (a) general formula 1: (b) a (meth)acrylamide; (c) an ionic monomer other than monomer (a) expressed by general formula 1 above.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: January 27, 2009
    Assignee: Seiko PMC Corporation
    Inventors: Toshitsugu Kiyosada, Akira Endou, Satoru Iwata, Masatomi Ogawa
  • Publication number: 20050272889
    Abstract: A novel (meth)acrylamide polymer capable of forming a papermaking chemical exhibiting an excellent paper strengthening effect, drainage improvement effect, retention improvement effect, plybond strength enhancing effect, surface strength enhancing effect, and sizing improvement effect in acid, neutral, or alkaline papermaking systems, as well as a method for manufacturing this polymer, and paper that makes use of this polymer and has excellent bursting strength, internal bond strength, and other such properties is provided.
    Type: Application
    Filed: February 21, 2003
    Publication date: December 8, 2005
    Inventors: Toshitsugu Kiyosada, Akira Endou, Satoru Iwata, Masatomi Ogawa