Patents by Inventor Nozomi YABUKI
Nozomi YABUKI 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: 11926763Abstract: Provided is hollow resin particles having higher compressive strength and more excellent heat insulating properties and heat resistance than before. The hollow resin particles each having one or two or more hollow portions, wherein a number average particle diameter is from 0.1 ?m to 9.0 ?m, a void ratio is from 70% to 99%, and an amount of the volatile organic compound contained is 5% by mass or less.Type: GrantFiled: March 25, 2019Date of Patent: March 12, 2024Assignee: ZEON CORPORATIONInventors: Takashi Iga, Takeshi Hirata, Nozomi Yabuki
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Publication number: 20230357524Abstract: The method produces hollow resin particles. The method comprising steps of: preparing a mixture liquid comprising (A) a monomer comprising at least one monomer selected from the group consisting of a monovinyl monomer and a hydrophilic monomer excluding acrylonitrile and methacrylonitrile, (B) a crosslinkable monomer, (C) an oil-soluble polymerization initiator, (E) a hydrocarbon solvent, (F) a suspension stabilizer and (G) an aqueous medium; carrying out a suspension treatment of the mixture liquid to prepare a suspension; carrying out a polymerization reaction of the suspension to prepare a precursor composition; carrying out a solid-liquid separation of the precursor composition to obtain the precursor particles; and removing the hydrocarbon solvent (E) included in the precursor particles.Type: ApplicationFiled: July 20, 2023Publication date: November 9, 2023Applicant: ZEON CORPORATIONInventors: Takashi Iga, Takeshi Hirata, Nozomi Yabuki
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Patent number: 11760857Abstract: Provided is a method for producing a latex comprising hollow resin particles each with a high void ratio and a method for producing hollow resin particles each with a higher void ratio. In the method for producing the latex: a suspension treatment of the mixture liquid which comprises a monomer, a crosslinkable monomer, an oil-soluble polymerization initiator, a fat/fatty oil, a hydrocarbon solvent, a suspension stabilizer and an aqueous medium is carried out to prepare a suspension comprising monomer drops; a polymerization reaction of the suspension is carried out to prepare a precursor composition which comprises precursor particles each having a hollow portion including the hydrocarbon solvent.Type: GrantFiled: July 31, 2018Date of Patent: September 19, 2023Assignee: ZEON CORPORATIONInventors: Takashi Iga, Takeshi Hirata, Nozomi Yabuki
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Patent number: 11707722Abstract: Provided are hollow particles which are more excellent in heat resistance and dispersibility than ever before and which are lightweight. The hollow particles containing hollow resin particles having a surface covered with inorganic fine particles, wherein a volume average particle diameter of the hollow particles is from 0.1 ?m to 9.0 ?m, and a void ratio thereof is from 55% to 95%; wherein a repeating unit constituting the resin of the hollow resin particles contains a crosslinkable monomer unit, and a content of the crosslinkable monomer unit is from 25 to 100 parts by mass, with respect to 100 parts by mass of the resin; wherein a primary particle diameter of the inorganic fine particles is from 10 nm to 120 nm; and wherein the inorganic fine particles are contained at from 5 to 180 parts by mass, with respect to 100 parts by mass of the hollow resin particles.Type: GrantFiled: September 11, 2019Date of Patent: July 25, 2023Assignee: ZEON CORPORATIONInventors: Takeshi Hirata, Nozomi Yabuki
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Patent number: 11649348Abstract: A medicine container which absorbs very little protein over time is manufactured using a resin composition including 50 to 99 wt % of a norbornene-based polymer, and 1 to 50 wt % of a hydrogenated styrene-based thermoplastic elastomer, a content of a low-molecular-weight component having a weight average molecular weight of 1000 or less in the resin composition being 3 wt % or less.Type: GrantFiled: November 29, 2013Date of Patent: May 16, 2023Assignee: ZEON CORPORATIONInventors: Taichi Sawaguchi, Satoshi Adachi, Shinsuke Miyazawa, Nozomi Yabuki
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Publication number: 20220153881Abstract: The method for producing hollow resin particles includes: carrying out a suspension treatment of a mixture liquid including a polymerizable monomer including a non-crosslinkable monomer and a crosslinkable monomer, a hydrocarbon solvent and an aqueous medium to prepare a suspension, carrying out a polymerization reaction of the suspension to form precursor particles having a hollow portion and including the hydrocarbon solvent in the hollow portion, and removing the hydrocarbon solvent included in the precursor particles to produce hollow resin particles. A content of the crosslinkable monomer is from 35 parts by mass to 95 parts by mass when the total mass of the polymerizable monomer is regarded as 100 parts by mass; a solubility parameter (SP value) of the polymerizable monomer is from 8.70 to 9.42; and a difference between the SP value of the polymerizable monomer and a SP value of the hydrocarbon solvent is 0.60 or more.Type: ApplicationFiled: January 30, 2020Publication date: May 19, 2022Applicant: ZEON CORPORATIONInventors: Takashi Iga, Nozomi Yabuki
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Publication number: 20210354102Abstract: Provided are hollow particles which are more excellent in heat resistance and dispersibility than ever before and which are lightweight. The hollow particles containing hollow resin particles having a surface covered with inorganic fine particles, wherein a volume average particle diameter of the hollow particles is from 0.1 ?m to 9.0 ?m, and a void ratio thereof is from 55% to 95%; wherein a repeating unit constituting the resin of the hollow resin particles contains a crosslinkable monomer unit, and a content of the crosslinkable monomer unit is from 25 to 100 parts by mass, with respect to 100 parts by mass of the resin; wherein a primary particle diameter of the inorganic fine particles is from 10 nm to 120 nm; and wherein the inorganic fine particles are contained at from 5 to 180 parts by mass, with respect to 100 parts by mass of the hollow resin particles.Type: ApplicationFiled: September 11, 2019Publication date: November 18, 2021Applicant: ZEON CORPORATIONInventors: Takeshi Hirata, Nozomi Yabuki
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Publication number: 20210087349Abstract: Provided is a method for producing a latex comprising hollow resin particles each with a high void ratio and a method for producing hollow resin particles each with a higher void ratio. In the method for producing the latex: a suspension treatment of the mixture liquid which comprises a monomer, a crosslinkable monomer, an oil-soluble polymerization initiator, a fat/fatty oil, a hydrocarbon solvent, a suspension stabilizer and an aqueous medium is carried out to prepare a suspension comprising monomer drops; a polymerization reaction of the suspension is carried out to prepare a precursor composition which comprises precursor particles each having a hollow portion including the hydrocarbon solvent.Type: ApplicationFiled: July 31, 2018Publication date: March 25, 2021Applicant: ZEON CORPORATIONInventors: Takashi Iga, Takeshi Hirata, Nozomi Yabuki
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Publication number: 20210002497Abstract: Provided is hollow resin particles having higher compressive strength and more excellent heat insulating properties and heat resistance than before. The hollow resin particles each having one or two or more hollow portions, wherein a number average particle diameter is from 0.1 ?m to 9.0 ?m, a void ratio is from 70% to 99%, and an amount of the volatile organic compound contained is 5% by mass or less.Type: ApplicationFiled: March 25, 2019Publication date: January 7, 2021Applicant: ZEON CORPORATIONInventors: Takashi Iga, Takeshi Hirata, Nozomi Yabuki
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Patent number: 10551757Abstract: The magenta toner for developing electrostatic images includes colored resin particles containing a binder resin and a magenta colorant, and an external additive. A volume average particle diameter of the colored resin particles is from 5.5 ?m to 7.0 ?m. The external additive contains silica particles. The silica particles contain at least silica particles A having a number average particle diameter of from 5 nm to 30 nm and silica particles B having a number average particle diameter of from 31 nm to 100 nm; wherein a total content of the silica particles is from 0.5 part by mass to 4.5 parts by mass, with respect to 100 parts by mass of the colored resin particles. A liberation rate of the silica particles calculated by a specific liberation rate measuring method is in a range of from 2.2% to 9.5%.Type: GrantFiled: March 22, 2017Date of Patent: February 4, 2020Assignee: ZEON CORPORATIONInventor: Nozomi Yabuki
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Publication number: 20190101842Abstract: The magenta toner for developing electrostatic images includes colored resin particles containing a binder resin and a magenta colorant, and an external additive. A volume average particle diameter of the colored resin particles is from 5.5 ?m to 7.0 ?m. The external additive contains silica particles. The silica particles contain at least silica particles A having a number average particle diameter of from 5 nm to 30 nm and silica particles B having a number average particle diameter of from 31 nm to 100 nm; wherein a total content of the silica particles is from 0.5 part by mass to 4.5 parts by mass, with respect to 100 parts by mass of the colored resin particles. A liberation rate of the silica particles calculated by a specific liberation rate measuring method is in a range of from 2.2% to 9.5%.Type: ApplicationFiled: March 22, 2017Publication date: April 4, 2019Applicant: ZEON CORPORATIONInventor: Nozomi Yabuki
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Patent number: 10246582Abstract: The present invention is a resin composition comprising a cycloolefin resin and at least two hydrogenated styrene-based thermoplastic elastomers, wherein a content of the cycloolefin resin is 50 to 90 wt % based on a total amount of the cycloolefin resin and the hydrogenated styrene-based thermoplastic elastomers, and a melt volume rate of the resin composition at 260° C. is higher than that of the cycloolefin resin at 260° C., and a resin formed article. One aspect of the invention provides a resin composition that exhibits excellent transparency, impact resistance and melt fluidity, as well as a resin formed article obtained by forming this resin composition. The resin formed article of the present invention is preferably used as a drug container, a medical instrument or the like, since it exhibits excellent transparency and impact resistance.Type: GrantFiled: March 3, 2016Date of Patent: April 2, 2019Assignee: ZEON CORPORATIONInventors: Taichi Sawaguchi, Nozomi Yabuki
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Publication number: 20180105689Abstract: Provided is a resin composition comprising 50 to 80 wt % of a norbornene-based polymer, and 20 to 50 wt % of a hydrogenated styrene-based thermoplastic elastomer, a content of a low-molecular-weight component having a molecular weight of 1000 or less in the resin composition being 3 wt % or less, in which the hydrogenated styrene-based thermoplastic elastomer is an aromatic vinyl-conjugated diene block copolymer having a styrene content of 40 wt % or more, or a block copolymer that includes an aromatic vinyl compound-based polymer block and an isobutylene-based polymer block having a styrene content of 15 wt % or more. Also, a medical drug container that shows very low protein adsorption with the passage of time is produced using such a resin composition.Type: ApplicationFiled: December 18, 2017Publication date: April 19, 2018Applicant: ZEON CORPORATIONInventors: Taichi SAWAGUCHI, Satoshi ADACHI, Shinsuke MIYAZAWA, Nozomi YABUKI
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Publication number: 20180030260Abstract: The present invention is a resin composition comprising a cycloolefin resin and at least two hydrogenated styrene-based thermoplastic elastomers, wherein a content of the cycloolefin resin is 50 to 90 wt % based on a total amount of the cycloolefin resin and the hydrogenated styrene-based thermoplastic elastomers, and a melt volume rate of the resin composition at 260° C. is higher than that of the cycloolefin resin at 260° C., and a resin formed article. One aspect of the invention provides a resin composition that exhibits excellent transparency, impact resistance and melt fluidity, as well as a resin formed article obtained by forming this resin composition. The resin formed article of the present invention is preferably used as a drug container, a medical instrument or the like, since it exhibits excellent transparency and impact resistance.Type: ApplicationFiled: March 3, 2016Publication date: February 1, 2018Applicant: ZEON CORPORATIONInventors: Taichi SAWAGUCHI, Nozomi YABUKI
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Publication number: 20170218191Abstract: The present invention pertains to a resin formed article obtained by forming a resin composition that comprises a cycloolefin resin and a styrene-based thermoplastic elastomer, the styrene-based thermoplastic elastomer having a weight average molecular weight of 20,000 to 150,000, and having a difference in refractive index (?nD) of more than ?0.002 to less than +0.002 with respect to the cycloolefin resin, the resin composition having a residual ratio of 0.10 wt % or less when analyzed based on the residue on ignition test method specified in the Japanese Pharmacopeia, the resin composition having a light transmittance (optical path length: 3 mm) of 55% or more with respect to light having a wavelength of 450 nm when the resin composition is formed in a shape of a sheet having a thickness of 3.0 mm, and subjected to light transmittance measurement, and the resin composition having a Charpy impact strength of 5 to 40 kJ/m2 when the resin composition is formed to have a thickness of 4.0 mm, a length of 80.Type: ApplicationFiled: July 23, 2015Publication date: August 3, 2017Applicant: ZEON CORPORATIONInventors: Nozomi YABUKI, Taichi SAWAGUCHI
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Publication number: 20150322256Abstract: A medicine container which absorbs very little protein over time is manufactured using a resin composition including 50 to 99 wt % of a norbornene-based polymer, and 1 to 50 wt % of a hydrogenated styrene-based thermoplastic elastomer, a content of a low-molecular-weight component having a weight average molecular weight of 1000 or less in the resin composition being 3 wt % or less.Type: ApplicationFiled: November 29, 2013Publication date: November 12, 2015Applicant: ZEON CORPORATIONInventors: Taichi SAWAGUCHI, Satoshi ADACHI, Shinsuke MIYAZAWA, Nozomi YABUKI