Patents by Inventor Yousuke Kumaki
Yousuke Kumaki 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).
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Patent number: 11667083Abstract: A process of manufacturing a three-dimensional object includes a step of depositing and solidifying molten polyvinyl alcohol to form a support structure; and a step of depositing and solidifying a molten thermoplastic polymer on the support structure to form a three-dimensional preform. The support structure has a mixture of at least 50% by weight of polyvinyl alcohol and at most 50% by weight of at least one polymer of polyvinyl butyral, polylactid acid, ethylene-vinylalcohol-vinylacetate terpolymer, vinyl acetate-vinyl pyrrolidone copolymer, acrylonitrile-butadiene-styrene terpolymer, polycaprolactone, vinyl acetate-vinyl caprolactame copolymer, and polyvinyl alcohol having a degree of hydrolysis DH of 30-65%. The support structure can be dissolved to form the three-dimensional object.Type: GrantFiled: October 16, 2017Date of Patent: June 6, 2023Assignee: KURARAY CO., LTD.Inventors: Yousuke Kumaki, Moritz Baier, Herbert Briers Keable
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Patent number: 10953606Abstract: The invention is directed to a process of manufacturing a three-dimensional object by depositing and solidifying molten polyvinyl alcohol (PVOH) to form a support structure depositing and solidifying a molten thermoplastic polymer on the support structure to form a three-dimensional preform dissolving the support structure to from the three-dimensional object characterized in that the polyvinyl alcohol (PVOH) has an alkaline acetate content of less than 0.5 wght %.Type: GrantFiled: October 16, 2017Date of Patent: March 23, 2021Assignee: KURARAY CO., LTD.Inventors: Yousuke Kumaki, Moritz Baier
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Publication number: 20200055256Abstract: The invention is directed to a process of manufacturing a three-dimensional object by depositing and solidifying molten polyvinyl alcohol (PVOH) to form a support structure depositing and solidifying a molten thermoplastic polymer on the support structure to form a three-dimensional preform dissolving the support structure to from the three-dimensional object characterized in that the polyvinyl alcohol (PVOH) has an alkaline acetate content of less than 0.5 wght %.Type: ApplicationFiled: October 16, 2017Publication date: February 20, 2020Applicant: Kuraray Co., Ltd.Inventors: Yousuke KUMAKI, Moritz BAIER
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Publication number: 20200055257Abstract: A process of manufacturing a three-dimensional object includes a step of depositing and solidifying molten polyvinyl alcohol to form a support structure; and a step of depositing and solidifying a molten thermoplastic polymer on the support structure to form a three-dimensional preform. The support structure has a mixture of at least 50% by weight of polyvinyl alcohol and at most 50% by weight of at least one polymer of polyvinyl butyral, polylactid acid, ethylene-vinylalcohol-vinylacetate terpolymer, vinyl acetate-vinyl pyrrolidone copolymer, acrylonitrile-butadiene-styrene terpolymer, polycaprolactone, vinyl acetate-vinyl caprolactame copolymer, and polyvinyl alcohol having a degree of hydrolysis DH of 30-65%. The support structure can be dissolved to form the three-dimensional object.Type: ApplicationFiled: October 16, 2017Publication date: February 20, 2020Applicant: Kuraray Co., Ltd.Inventors: Yousuke KUMAKI, Moritz BAIER, Herbert Briers KEABLE
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Publication number: 20200047418Abstract: The invention is directed to a process of manufacturing a three-dimensional object by—providing a support structure comprising polyvinyl alcohol (PVOH) to—depositing and solidifying a molten thermoplastic polymer on the support structure to form a three-dimensional preform characterized in that the support structure consists of a mixture of polyvinyl alcohol (PVOH) and at most 20% by weight of at least one plasticizer according to formula (I), (II) or (III): —R1-C(CH2—OH)3 (1); —[R1-C(CH2—OH)2CH2]2O (11); —(R1)C(CH2—OH)2CH2—O—CH2C(CH2—OH)C(R1)CH2—O—CH2 C(CH2—OH)2R1 (III). With R1=H, CH3, C2H5, C3H7, CH2OH. The support structure can be dissolved to from the three-dimensional object.Type: ApplicationFiled: October 16, 2017Publication date: February 13, 2020Applicant: KURARAY CO., LTD.Inventors: Yousuke KUMAKI, Moritz BAIER
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Patent number: 9777080Abstract: A dispersion stabilizer for suspension polymerization of vinyl compounds comprising a vinyl alcohol polymer (A) which has a saponification degree of 30 mol % or more and less than 60 mol % and a viscosity-average polymerization degree (P) of more than 200 and less than 600, and has a terminal alkyl group having 6 to 18 carbon atoms, and in which a content of monomer units having an oxyalkylene group is 0.3 mol % or less and the relationship between the viscosity-average polymerization degree (P) and a modification rate (S) (mol %) of the alkyl group satisfies Formula (1). Thus, there can be provided a dispersion stabilizer for suspension polymerization with which, during suspension polymerization of vinyl compounds including vinyl chloride, even when it is used in a small amount, the absorbency of a plasticizer is high, resulting in easy processing and formation of coarse particles is little and the remaining monomer components can be easily removed. 50?S×P/1.Type: GrantFiled: July 17, 2013Date of Patent: October 3, 2017Assignee: KURARAY CO., LTD.Inventors: Tadahito Fukuhara, Yousuke Kumaki
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Patent number: 9163138Abstract: The present invention provides a halogen-containing resin composition comprising 100 parts by weight of a halogen-containing resin; 0.01 to 2.5 parts by weight of a polyvinyl alcohol having a saponification degree of from 60 to 99.9 mol % and a viscosity-average polymerization degree of from 100 to 1,000; 0.01 to 2.5 parts by weight of a polyol having a molecular weight of 2,000 or less and a hydroxyl content of 10% by weight or more; and 0.01 to 5 parts by weight of a zinc compound.Type: GrantFiled: September 22, 2011Date of Patent: October 20, 2015Assignee: KURARAY CO., LTD.Inventors: Takeshi Kusudou, Akira Tsuboi, Masato Nakamae, Yousuke Kumaki, Hideki Maki
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Publication number: 20150191558Abstract: A dispersion stabilizer for suspension polymerization of vinyl compounds comprising a vinyl alcohol polymer (A) which has a saponification degree of 30 mol % or more and less than 60 mol % and a viscosity-average polymerization degree (P) of more than 200 and less than 600, and has a terminal alkyl group having 6 to 18 carbon atoms, and in which a content of monomer units having an oxyalkylene group is 0.3 mol % or less and the relationship between the viscosity-average polymerization degree (P) and a modification rate (S) (mol %) of the alkyl group satisfies Formula (1). Thus, there can be provided a dispersion stabilizer for suspension polymerization with which, during suspension polymerization of vinyl compounds including vinyl chloride, even when it is used in a small amount, the absorbency of a plasticizer is high, resulting in easy processing and formation of coarse particles is little and the remaining monomer components can be easily removed. 50?S×P/1.Type: ApplicationFiled: July 17, 2013Publication date: July 9, 2015Applicant: KURARAY CO., LTD.Inventors: Tadahito Fukuhara, Yousuke Kumaki
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Publication number: 20130253116Abstract: The present invention provides a halogen-containing resin composition comprising 100 parts by weight of a halogen-containing resin; 0.01 to 2.5 parts by weight of a polyvinyl alcohol having a saponification degree of from 60 to 99.9 mol % and a viscosity-average polymerization degree of from 100 to 1,000; 0.01 to 2.5 parts by weight of a polyol having a molecular weight of 2,000 or less and a hydroxyl content of 10% by weight or more; and 0.01 to 5 parts by weight of a zinc compound.Type: ApplicationFiled: September 22, 2011Publication date: September 26, 2013Applicant: Kuraray Co., Ltd.Inventors: Takeshi Kusudou, Akira Tsuboi, Masato Nakamae, Yousuke Kumaki, Hideki Maki
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Patent number: 7056977Abstract: The invention provides a polyvinyl acetal having a degree of acetalization of from 45 to 80 mol %, which is obtained through acetalization of a polyvinyl alcohol having a degree of polymerization of from 30 to 1000 and a degree of hydrolysis of from 80.0 to 99.99 mol % and having a specific amount of an ionic group bonded to the terminal thereof via a sulfido bond. The polyvinyl acetal of the invention is useful for binders for ceramic forming and for binders for ink or paint.Type: GrantFiled: July 23, 2003Date of Patent: June 6, 2006Assignee: Kuraray Co., Ltd.Inventors: Takeshi Kusudou, Yousuke Kumaki, Naoki Fujiwara
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Patent number: 6992130Abstract: The invention provides a polyvinyl acetal having a degree of acetalization of from 45 to 80 mol %, which is obtained through acetalization of a polyvinyl alcohol that contains from 1 to 15 mol % of ?-olefin units and has a 1,2-glycol bond content of from 1 to 3 mol %, a degree of polymerization of from 100 to 2000 and a degree of hydrolysis of from 80.0 to 99.99 mol %. The polyvinyl acetal has good waterproofness and good compatibility with plasticizer. Having the advantages, it is favorable for interlayer films for laminated glass, binders for ceramic forming, binders for ink or paint, and coating liquids for thermally-developable photographic materials.Type: GrantFiled: July 17, 2003Date of Patent: January 31, 2006Assignee: Kuraray Co., Ltd.Inventors: Takeshi Kusudou, Yousuke Kumaki, Naoki Fujiwara
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Patent number: 6984692Abstract: The invention provides a novel polyvinyl acetal having N-vinylamide monomer units in the molecule, and provides a binder with the novel polymer for ink or paint and for ceramic forming. Compared with conventional polyvinyl acetals, the novel polymer lowers the solution viscosity and increases the solid content (pigment content) of ink or paint in which the polymer serves as a binder. The binder with the novel polymer for ceramic molding enables production of thin and homogeneous ceramic green sheets of high strength.Type: GrantFiled: January 21, 2004Date of Patent: January 10, 2006Assignees: Kuraray Co., Ltd., Kuraray Specialities Europe GmbHInventors: Yousuke Kumaki, Takeshi Kusudou, Naoki Fujiwara, Bernd Papenfuhs, Simon Jonas
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Publication number: 20040152835Abstract: The invention provides a novel polyvinyl acetal having N-vinylamide monomer units in the molecule, and provides a binder with the novel polymer for ink or paint and for ceramic forming. Compared with conventional polyvinyl acetals, the novel polymer lowers the solution viscosity and increases the solid content (pigment content) of ink or paint in which the polymer serves as a binder. The binder with the novel polymer for ceramic molding enables production of thin and homogeneous ceramic green sheets of high strength.Type: ApplicationFiled: January 21, 2004Publication date: August 5, 2004Applicants: Kuraray Co., Ltd., Kuraray Specialities Europe GmbHInventors: Yousuke Kumaki, Takeshi Kusudou, Naoki Fujiwara, Bernd Papenfuhs, Simon Jonas
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Publication number: 20040122167Abstract: The invention provides a polyvinyl acetal having a degree of acetalization of from 45 to 80 mol %, which is obtained through acetalization of a polyvinyl alcohol having a degree of polymerization of from 30 to 1000 and a degree of hydrolysis of from 80.0 to 99.99 mol % and having a specific amount of an ionic group bonded to the terminal thereof via a sulfido bond. The polyvinyl acetal of the invention is useful for binders for ceramic forming and for binders for ink or paint.Type: ApplicationFiled: July 23, 2003Publication date: June 24, 2004Applicant: KURARAY CO. LTDInventors: Takeshi Kusudou, Yousuke Kumaki, Naoki Fujiwara
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Publication number: 20040024137Abstract: The invention provides a polyvinyl acetal having a degree of acetalization of from 45 to 80 mol %, which is obtained through acetalization of a polyvinyl alcohol that contains from 1 to 15 mol % of &agr;-olefin units and has a 1,2-glycol bond content of from 1 to 3 mol %, a degree of polymerization of from 100 to 2000 and a degree of hydrolysis of from 80.0 to 99.99 mol %. The polyvinyl acetal has good waterproofness and good compatibility with plasticizer. Having the advantages, it is favorable for interlayer films for laminated glass, binders for ceramic forming, binders for ink or paint, and coating liquids for thermally-developable photographic materials.Type: ApplicationFiled: July 17, 2003Publication date: February 5, 2004Applicant: Kuraray Co., Ltd.Inventors: Takeshi Kusudou, Yousuke Kumaki, Naoki Fujiwara