Patents Assigned to KJ Chemicals Corporation
  • 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: 20200384683
    Abstract: A three-dimensional molding apparatus is provided and includes a reservoir portion, a nozzle portion, a liquid-sending unit, and a temperature control unit that correspond to each of the two or more different types of materials, a molding stage, a relative movement mechanism for moving the stage and the nozzle portions, and a control computer. By using this apparatus, industrial additive manufacturing with two or more different types of materials can be realized with high precision, and high-definition molded products in which different types of materials are arbitrarily combined can be produced.
    Type: Application
    Filed: June 24, 2019
    Publication date: December 10, 2020
    Applicant: KJ CHEMICALS CORPORATION
    Inventors: Yoshio KUNIHIRO, Yuya ISHIMARU
  • 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: 10759897
    Abstract: Provided is an active energy ray curable resin which has excellent compatibility with organic solvents, general purpose acrylic monomers, and oligomers, and a high curing property with an active energy ray, and also has a high adhesion property for each substrate. A cured film obtained by ultraviolet curing of the active energy ray curable resin has an excellent surface curing property, scratch resistance and bending resistance, while also having high transparency. Provided is a urethane modified (meth)acrylamide compound having a urethane bond and one or more (meth)acrylamide groups in the molecule. The urethane modified (meth)acrylamide compound has excellent compatibility with organic solvents, general purpose acrylic monomers, and oligomers, and exhibits a high curing property with an active energy ray.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: September 1, 2020
    Assignee: KJ CHEMICALS CORPORATION
    Inventors: Miki Takenouchi, Kouji Teramoto, Yusuke Adachi
  • 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: 10676561
    Abstract: An object is to provide a (meth)acrylamide based urethane oligomer which has excellent compatibility with organic solvents and general purpose acrylic monomers and oligomers, a high curing property with an active energy ray, and a low curing shrinkage property, and to provide an active energy ray curable resin composition containing the same which has an excellent adhesion property, moisture resistance, surface curing property, and also a low curing shrinkage property, and a molded article of the same. By using a (meth)acrylamide based urethane oligomer characterized by having a (meth)acrylamide group at the end or in side chain thereof and a cure shrinkage rate of 5% or less, it is possible to prepare a urethane oligomer having high curing property and excellent compatibility with organic solvents and general purpose acrylic monomers and oligomers, and an active energy ray curable resin composition containing the same and having excellent adhesion property can be prepared.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: June 9, 2020
    Assignee: KJ CHEMICALS CORPORATION
    Inventors: Meiri Hirata, Miki Takenouchi, Yusuke Adachi, Kouji Teramoto
  • 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
  • Publication number: 20180244831
    Abstract: An object is to provide a (meth)acrylamide based urethane oligomer which has excellent compatibility with organic solvents and general purpose acrylic monomers and oligomers, a high curing property with an active energy ray, and a low curing shrinkage property, and to provide an active energy ray curable resin composition containing the same which has an excellent adhesion property, moisture resistance, surface curing property, and also a low curing shrinkage property, and a molded article of the same. By using a (meth)acrylamide based urethane oligomer characterized by having a (meth)acrylamide group at the end or in side chain thereof and a cure shrinkage rate of 5% or less, it is possible to prepare a urethane oligomer having high curing property and excellent compatibility with organic solvents and general purpose acrylic monomers and oligomers, and an active energy ray curable resin composition containing the same and having excellent adhesion property can be prepared.
    Type: Application
    Filed: September 14, 2016
    Publication date: August 30, 2018
    Applicant: KJ CHEMICALS CORPORATION
    Inventors: Meiri HIRATA, Miki TAKENOUCHI, Yusuke ADACHI, Kouji TERAMOTO
  • Publication number: 20180244832
    Abstract: Provided is an active energy ray curable resin which has excellent compatibility with organic solvents, general purpose acrylic monomers, and oligomers, and a high curing property with an active energy ray, and also has a high adhesion property for each substrate. A cured film obtained by ultraviolet curing of the active energy ray curable resin has an excellent surface curing property, scratch resistance and bending resistance, while also having high transparency. Provided is a urethane modified (meth)acrylamide compound having a urethane bond and one or more (meth)acrylamide groups in the molecule. The urethane modified (meth)acrylamide compound has excellent compatibility with organic solvents, general purpose acrylic monomers, and oligomers, and exhibits a high curing property with an active energy ray.
    Type: Application
    Filed: September 13, 2016
    Publication date: August 30, 2018
    Applicant: KJ CHEMICALS CORPORATION
    Inventors: Miki TAKENOUCHI, Kouji TERAMOTO, Yusuke ADACHI
  • Patent number: 9738748
    Abstract: [Problem] An problem of the present invention is to provide to a (meth)acrylamide-based urethane oligomer which has excellent compatibility with organic solvents, general purpose acrylic monomers and oligomers, and a high curing speed to active energy rays, and to provide an active energy ray curable resin composition which contains the urethane oligomer, has excellent adhesion, moisture resistance and surface curability, and has low curing shrinkage, and a formed product thereof [Means for Solution] By using a (meth)acrylamide-based urethane oligomer of the present invention which has a carbonate skeleton, a diene-based skeleton or a hydrogenated diene-based skeleton in the molecule, one or more (meth)acrylamide groups and a component having a molecular weight of less than 1,000 (excluding a (meth)acrylamide compound (A) having a hydroxyl group) at a content of 5% by weight or less, it is possible to obtain a urethane oligomer which has excellent compatibility with organic solvents, general purpose acrylic m
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: August 22, 2017
    Assignee: KJ Chemicals Corporation
    Inventors: Miki Takenouchi, Yusuke Adachi, Meiri Hirata