Patents Assigned to KJ Chemicals Corporation
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Publication number: 20230406986Abstract: To provide: a solvent used for synthesizing a synthetic resin such as a polyimide resin and a polyurethane resin, the solvent capable of synthesizing a polymer having a high molecular weight in a short time, causing no clouding of a reaction solution during and after reaction, and having high transparency and storage stability; and a method for producing the synthetic resin using the solvent. A solvent (C) for resin synthesis, containing: 10 to 99.9999 mass % of an amide-based solvent (A); and 0.0001 to 5 mass % of a reaction accelerator (B), in which the reaction accelerator (B) is an aliphatic or aromatic tertiary amine compound having one or more tertiary amino groups in a molecule of the reaction accelerator (B).Type: ApplicationFiled: September 8, 2021Publication date: December 21, 2023Applicant: KJ CHEMICALS CORPORATIONInventors: Meiri HIRATA, Hideki MASUDA
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Publication number: 20230391937Abstract: A polymerizable composition; a product of polymerization of the polymerizable composition; and various molded articles obtained using the polymerizable composition and the product of polymerization of the polymerizable composition. The polymerizable composition contains N-substituted (meth)acrylamide (A) represented by a the formula: where R1 represents a hydrogen atom or a methyl group, one of R2 and R3 represents a chain hydrocarbon group having 6 or more carbon atoms or a cyclic hydrocarbon group having 6 or more carbon atoms, the other represents a hydrogen atom, a chain hydrocarbon group having 1 or more carbon atoms, or a cyclic hydrocarbon group having 3 or more carbon atoms, and R2 and R3 include a group in which a 6- or more-membered saturated ring is formed together with a nitrogen atom carrying R2 and R3.Type: ApplicationFiled: October 15, 2021Publication date: December 7, 2023Applicant: KJ CHEMICALS CORPORATIONInventors: Atsushi YASUNAGA, Yu NARAZAKI, Yilixiati MAIMAITIYIMING
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Patent number: 11826963Abstract: 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: GrantFiled: July 18, 2019Date of Patent: November 28, 2023Assignee: KJ CHEMICALS CORPORATIONInventors: Meiri Hirata, Kouhei Satou, Toshitsugu Kiyosada
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Patent number: 11787884Abstract: The present application provides a photopolymerization initiator having one or more ethylenic unsaturated bonds and one or more photopolymerization initiating functional groups in the molecule has been found. One or more kinds selected from an acrylamide group, an acrylate group, a vinyl group, an allyl group, a maleimide group, and the like can be suitably used as the ethylenic unsaturated bond, and a benzophenone compound having a specific structure can be suitably used as the photopolymerization initiating functional group.Type: GrantFiled: December 11, 2020Date of Patent: October 17, 2023Assignee: KJ CHEMICALS CORPORATIONInventors: Meiri Hirata, Daisuke Kobayashi, Yoshimi Takeda
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Publication number: 20230037488Abstract: The present application provides a photopolymerization initiator having one or more ethylenic unsaturated bonds and one or more photopolymerization initiating functional groups in the molecule has been found. One or more kinds selected from an acrylamide group, an acrylate group, a vinyl group, an allyl group, a maleimide group, and the like can be suitably used as the ethylenic unsaturated bond, and a benzophenone compound having a specific structure can be suitably used as the photopolymerization initiating functional group.Type: ApplicationFiled: December 11, 2020Publication date: February 9, 2023Applicant: KJ CHEMICALS CORPORATIONInventors: Meiri HIRATA, Daisuke KOBAYASHI, Yoshimi TAKEDA
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Patent number: 11491709Abstract: 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: GrantFiled: June 24, 2019Date of Patent: November 8, 2022Assignee: KJ CHEMICALS CORPORATIONInventors: Yoshio Kunihiro, Yuya Ishimaru, Toshitsugu Kiyosada
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Patent number: 11478982Abstract: 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: GrantFiled: June 24, 2019Date of Patent: October 25, 2022Assignee: KJ CHEMICALS CORPORATIONInventors: Yoshio Kunihiro, Yuya Ishimaru
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Publication number: 20210008791Abstract: 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: ApplicationFiled: June 24, 2019Publication date: January 14, 2021Applicant: KJ CHEMICALS CORPORATIONInventors: Yoshio KUNIHIRO, Yuya ISHIMARU, Toshitsugu KIYOSADA
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Publication number: 20200384683Abstract: 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: ApplicationFiled: June 24, 2019Publication date: December 10, 2020Applicant: KJ CHEMICALS CORPORATIONInventors: Yoshio KUNIHIRO, Yuya ISHIMARU
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Publication number: 20200384696Abstract: 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: ApplicationFiled: July 18, 2019Publication date: December 10, 2020Applicant: KJ CHEMICALS CORPORATIONInventors: Meiri HIRATA, Kouhei SATOU, Toshitsugu KIYOSADA
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Patent number: 10759897Abstract: 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: GrantFiled: September 13, 2016Date of Patent: September 1, 2020Assignee: KJ CHEMICALS CORPORATIONInventors: Miki Takenouchi, Kouji Teramoto, Yusuke Adachi
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Patent number: 10711149Abstract: 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: GrantFiled: January 20, 2016Date of Patent: July 14, 2020Assignee: KJ CHEMICALS CORPORATIONInventor: Toshitsugu Kiyosada
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Patent number: 10676561Abstract: 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: GrantFiled: September 14, 2016Date of Patent: June 9, 2020Assignee: KJ CHEMICALS CORPORATIONInventors: Meiri Hirata, Miki Takenouchi, Yusuke Adachi, Kouji Teramoto
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Patent number: 10286598Abstract: 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: GrantFiled: February 3, 2016Date of Patent: May 14, 2019Assignees: KJ CHEMICALS CORPORATION, MIMAKI ENGINEERING CO., LTD.Inventor: Toshitsugu Kiyosada
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Publication number: 20180291219Abstract: 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: ApplicationFiled: January 20, 2016Publication date: October 11, 2018Applicant: KJ CHEMICALS CORPORATIONInventor: Toshitsugu KIYOSADA
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Publication number: 20180264716Abstract: 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: ApplicationFiled: February 3, 2016Publication date: September 20, 2018Applicants: KJ CHEMICALS CORPORATION, MIMAKI ENGINEERING CO., LTD.Inventor: Toshitsugu KIYOSADA
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Publication number: 20180244832Abstract: 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: ApplicationFiled: September 13, 2016Publication date: August 30, 2018Applicant: KJ CHEMICALS CORPORATIONInventors: Miki TAKENOUCHI, Kouji TERAMOTO, Yusuke ADACHI
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Publication number: 20180244831Abstract: 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: ApplicationFiled: September 14, 2016Publication date: August 30, 2018Applicant: KJ CHEMICALS CORPORATIONInventors: Meiri HIRATA, Miki TAKENOUCHI, Yusuke ADACHI, Kouji TERAMOTO
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Patent number: 9738748Abstract: [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 mType: GrantFiled: March 11, 2015Date of Patent: August 22, 2017Assignee: KJ Chemicals CorporationInventors: Miki Takenouchi, Yusuke Adachi, Meiri Hirata