Patents by Inventor Tomofumi Ohnishi
Tomofumi Ohnishi 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: 11506819Abstract: A method for producing an optical component, the method including: a step of injecting a polymerizable composition including a polythiol component and a polyisocyanate component into a molding die using a tube; and a step of polymerizing the polymerizable composition, wherein a percentage content of a plasticizer in the tube is 20% by mass or less.Type: GrantFiled: March 29, 2019Date of Patent: November 22, 2022Assignee: HOYA LENS THAILAND LTD.Inventor: Tomofumi Ohnishi
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Publication number: 20220204685Abstract: A polymerizable composition for optical components according to one embodiment of the present disclosure includes a polyiso(thio)cyanate compound (A) having one or more aromatic rings in one molecule, a polythiol compound (B) having three or more mercapto groups in one molecule, and an acidic phosphate ester compound (C), wherein the content of the acidic phosphate ester compound (C) is 0.1 to 3.0 parts by mass with respect to a total amount of 100 parts by mass of the polyiso(thio)cyanate compound (A) and the polythiol compound (B), and wherein the content of a polymerization catalyst is 0.006 parts by mass or less with respect to a total amount of 100 parts by mass of the polyiso(thio)cyanate compound (A) and the polythiol compound (B).Type: ApplicationFiled: March 21, 2022Publication date: June 30, 2022Applicant: HOYA LENS THAILAND LTD.Inventors: Tomofumi OHNISHI, Yoshio SANO
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Publication number: 20220185944Abstract: A polymerizable composition for optical components, which can prevent the occurrence of coloring while keeping the required strength for optical components when an optical component is produced using the polymerizable composition for optical components. The polymerizable composition for optical components according to the present embodiment includes a polyisocyanate compound (A) and a polythiol compound (B1) and has an equivalent ratio (A/B1) of 80/100 to 95/100, wherein the equivalent ratio (A/B1) represents a ratio of an equivalent A of the polyisocyanate compound (A) calculated using the molecular weight and the functional group number of the polyisocyanate compound (A) to an equivalent B1 of the polythiol compound (B1) calculated using the molecular weight and the functional group number of the polythiol compound (B1).Type: ApplicationFiled: March 27, 2020Publication date: June 16, 2022Applicant: HOYA LENS THAILAND LTD.Inventors: Masahisa KOUSAKA, Yukio KAGEYAMA, Tomofumi OHNISHI, Yoshio SANO
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Publication number: 20220169778Abstract: A polymerizable composition for optical components, which can prevent striae while keeping strength for optical components when a thick optical component is produced. A polymerizable composition for optical components is a mixture of a first composition including a polyisocyanate compound (A) and a second composition including a polythiol compound (B1) and a thiol group-containing substance (B2), the composition includes the thiol group-containing substance (B2) showing peak at a position at retention time three minutes or more from a peak of the polythiol compound (B1) in a chromatogram obtained by analyzing the composition by high performance liquid chromatography (HPLC) analysis, and the ratio (A/B1) is 80/100 to 95/100, wherein the equivalent ratio (A/B1) is an equivalent A of the polyisocyanate compound (A) using a weight and group number of the polyisocyanate compound (A) to B1 of the polythiol compound (B1) using a weight and group number of the polythiol compound (B1).Type: ApplicationFiled: March 27, 2020Publication date: June 2, 2022Applicant: HOYA LENS THAILAND LTD.Inventors: Masahisa KOUSAKA, Yukio KAGEYAMA, Tomofumi OHNISHI, Yoshio SANO
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Publication number: 20210206902Abstract: A method for producing an optical component resin including a first pressure-reduction step in which a mixture containing a polyisocyanate component and a polythiol component is disposed under a reduced pressure, a second pressure-reduction step in which a release agent is added after the first pressure-reduction step, and the mixture is further disposed under a reduced pressure, and a polymerization step in which the mixture is polymerized.Type: ApplicationFiled: March 24, 2021Publication date: July 8, 2021Applicant: HOYA LENS THAILAND LTD.Inventors: Tomofumi OHNISHI, Yoshio SANO
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Patent number: 10766996Abstract: Provided is a method for producing a polythiol compound, including reacting 2-mercaptoethanol with an epihalohydrin, wherein the reaction is carried out in the presence of a halide selected from the group consisting of a 2,3-dihalogeno-1-propanol and an allyl halide, and an amount of the halide in the reaction is more than 0.50% by mass and 10.00% by mass or less with respect to the total amount of the halide and the epihalohydrin. Also provided are a method for producing a curable composition, including producing a polythiol compound by the abovementioned production method, and a method for producing a cured product, including producing a curable composition by the abovementioned production method.Type: GrantFiled: June 22, 2018Date of Patent: September 8, 2020Assignee: HOYA LENS THAILAND LTD.Inventors: Yukio Kageyama, Masahisa Kousaka, Tomofumi Ohnishi
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Patent number: 10752726Abstract: To provide a resin composition having a good slightly bluish color tone, a spectacle lens including a base material made of the resin composition, and a method for producing the resin composition. Provided is a resin composition obtained by polymerizing a polymerizable composition including a polyisocyanate compound and a polythiol compound. The polymerizable composition includes a dye L having an absorption maximum wavelength of 550 nm or more and 600 nm or less in a toluene solution of 20 ppm by mass, and a dye S having an absorption maximum wavelength of 500 nm or more and less than 550 nm in a toluene solution of 20 ppm by mass. A mass ratio [(mass of dye L)/(mass of dye S)] of the dye L to the dye S is 5 or more and 500 or less.Type: GrantFiled: May 30, 2018Date of Patent: August 25, 2020Assignee: HOYA LENS THAILAND LTD.Inventors: Yukio Kageyama, Masahisa Kousaka, Tomofumi Ohnishi
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Publication number: 20200264336Abstract: A method for producing an optical component, the method including: a step of injecting a polymerizable composition including a polythiol component and a polyisocyanate component into a molding die using a tube; and a step of polymerizing the polymerizable composition, wherein a percentage content of a plasticizer in the tube is 20% by mass or less.Type: ApplicationFiled: March 29, 2019Publication date: August 20, 2020Applicant: HOYA LENS THAILAND LTD.Inventor: Tomofumi OHNISHI
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Patent number: 10611726Abstract: Provided is a method for producing a polythiol compound, including obtaining one or more polythiol compounds selected from the group consisting of a polythiol compound represented by Formula (3), a polythiol compound represented by Formula (4), and a polythiol compound represented by Formula (5) through steps including: reacting 2-mercaptoethanol with an epihalohydrin in an amount of 1.00 equivalent or more and 1.25 equivalent or less with respect to the 2-mercaptoethanol to obtain a polyol compound represented by Formula (1); and reacting the polyol compound represented by Formula (1) with an alkali metal sulfide in an amount of 1.04 equivalent or more and 1.25 equivalent or less with respect to the 2-mercaptoethanol to obtain a polyol compound represented by Formula (2).Type: GrantFiled: June 22, 2018Date of Patent: April 7, 2020Assignee: HOYA LENS THAILAND LTD.Inventors: Yukio Kageyama, Masahisa Kousaka, Tomofumi Ohnishi
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Patent number: 10301415Abstract: Provided is a polymerizable composition for an optical component which has excellent coloring performance. [1] A polymerizable composition for an optical component, including a urethane acrylate represented by general formula (1), and a photochromic compound. [2] An optical component obtained by polymerizing the polymerizable composition. [3] A spectacle lens substrate formed from the optical component.Type: GrantFiled: March 31, 2016Date of Patent: May 28, 2019Assignee: HOYA LENS THAILAND LTD.Inventors: Tomofumi Ohnishi, Masahisa Kousaka
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Publication number: 20180372915Abstract: An object is to provide a method for manufacturing a spectacle lens having an excellent cut ratio of light having a wavelength of 420 nm and further having an excellent appearance, and a spectacle lens. [1] A method for manufacturing a spectacle lens, including a step of immersing a substrate in an immersion liquid containing an indole-based UV absorber, and [2] a spectacle lens including a substrate impregnated with an indole-based UV absorber by a dyeing method.Type: ApplicationFiled: June 26, 2018Publication date: December 27, 2018Applicant: HOYA LENS THAILAND LTD.Inventors: Tomofumi OHNISHI, Masahisa KOUSAKA, Shinya MIYAJIMA
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Publication number: 20180362699Abstract: Provided is a method for producing a polythiol compound, including reacting 2-mercaptoethanol with an epihalohydrin, wherein the reaction is carried out in the presence of a halide selected from the group consisting of a 2,3-dihalogeno-1-propanol and an allyl halide, and an amount of the halide in the reaction is more than 0.50% by mass and 10.00% by mass or less with respect to the total amount of the halide and the epihalohydrin. Also provided are a method for producing a curable composition, including producing a polythiol compound by the abovementioned production method, and a method for producing a cured product, including producing a curable composition by the abovementioned production method.Type: ApplicationFiled: June 22, 2018Publication date: December 20, 2018Applicant: HOYA LENS THAILAND LTD.Inventors: Yukio KAGEYAMA, Masahisa KOUSAKA, Tomofumi OHNISHI
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Publication number: 20180297943Abstract: Provided is a method for producing a polythiol compound, including obtaining one or more polythiol compounds selected from the group consisting of a polythiol compound represented by Formula (3), a polythiol compound represented by Formula (4), and a polythiol compound represented by Formula (5) through steps including: reacting 2-mercaptoethanol with an epihalohydrin in an amount of 1.00 equivalent or more and 1.25 equivalent or less with respect to the 2-mercaptoethanol to obtain a polyol compound represented by Formula (1); and reacting the polyol compound represented by Formula (1) with an alkali metal sulfide in an amount of 1.04 equivalent or more and 1.25 equivalent or less with respect to the 2-mercaptoethanol to obtain a polyol compound represented by Formula (2).Type: ApplicationFiled: June 22, 2018Publication date: October 18, 2018Applicant: HOYA LENS THAILAND LTD.Inventors: Yukio KAGEYAMA, Masahisa KOUSAKA, Tomofumi OHNISHI
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Publication number: 20180273673Abstract: To provide a resin composition having a good slightly bluish color tone, a spectacle lens including a base material made of the resin composition, and a method for producing the resin composition. Provided is a resin composition obtained by polymerizing a polymerizable composition including a polyisocyanate compound and a polythiol compound. The polymerizable composition includes a dye L having an absorption maximum wavelength of 550 nm or more and 600 nm or less in a toluene solution of 20 ppm by mass, and a dye S having an absorption maximum wavelength of 500 nm or more and less than 550 nm in a toluene solution of 20 ppm by mass. A mass ratio [(mass of dye L)/(mass of dye S)] of the dye L to the dye S is 5 or more and 500 or less.Type: ApplicationFiled: May 30, 2018Publication date: September 27, 2018Applicant: HOYA LENS THAILAND LTD.Inventors: Yukio KAGEYAMA, Masahisa KOUSAKA, Tomofumi OHNISHI
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Publication number: 20180079848Abstract: Provided is a polymerizable composition for an optical component which has excellent coloring performance. [1] A polymerizable composition for an optical component, including a urethane acrylate represented by general formula (1), and a photochromic compound. [2] An optical component obtained by polymerizing the polymerizable composition. [3] A spectacle lens substrate formed from the optical component.Type: ApplicationFiled: March 31, 2016Publication date: March 22, 2018Applicant: HOYA LENS THAILAND LTD.Inventors: Tomofumi OHNISHI, Masahisa KOUSAKA
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Publication number: 20180004014Abstract: Provided is a spectacle lens having, on at least one side of a lens substrate, a polarizing layer containing a dichromic pigment, and a photochromic layer containing a photochromic pigment, and having the polarizing layer and the photochromic layer via an intermediate layer.Type: ApplicationFiled: September 13, 2017Publication date: January 4, 2018Applicant: HOYA LENS THAILAND LTD.Inventors: Takumi GOTO, Kakuya YAMAMOTO, Seiichi MASUDA, Hidetaka SHIMIZU, Tomofumi OHNISHI
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Publication number: 20150044363Abstract: An aspect of the present invention relates to a method of manufacturing a polarizing lens, which comprises forming a polarizing layer comprising a dichroic dye on a lens substrate, and conducting an epoxysilane treatment to impregnate the polarizing layer with an epoxy group-containing silane coupling agent such that a rate of increase in a film thickness of the polarizing layer by the epoxysilane treatment is equal to or greater than 8 percent.Type: ApplicationFiled: January 25, 2013Publication date: February 12, 2015Applicant: HOYA CORPORATIONInventors: Tomofumi Ohnishi, Yasuko Yamada
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Patent number: 8902487Abstract: The present invention relates to a photochromic lens, which comprises a photochromic layer comprising a photochromic dye and a resin component, and an organic hardcoat layer in this order, wherein the resin component is an acrylic resin, and the photochromic layer further comprises a piperidine ring-containing compound having a molecular weight of equal to or greater than 1,000.Type: GrantFiled: March 30, 2012Date of Patent: December 2, 2014Assignee: Hoya CorporationInventor: Tomofumi Ohnishi
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Publication number: 20140125947Abstract: The present invention provides a plastic lens capable of suppressing deformation while having a photochromic film. A plastic lens according to the present invention is configured to include a plastic substrate formed in a meniscus shape with a concave surface and a convex surface, a photochromic film provided on the convex surface of the plastic substrate, and a stress compensation film provided on the concave surface of the plastic substrate.Type: ApplicationFiled: May 31, 2012Publication date: May 8, 2014Applicant: HOYA CORPORATIONInventors: Takeshi Imizu, Tomofumi Ohnishi, Hiroshi Ota, Terufumi Hamamoto
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Publication number: 20140036334Abstract: The present invention relates to a photochromic lens, which comprises a photochromic layer comprising a photochromic dye and a resin component, and an organic hardcoat layer in this order, wherein the resin component is an acrylic resin, and the photochromic layer further comprises a piperidine ring-containing compound having a molecular weight of equal to or greater than 1,000.Type: ApplicationFiled: March 30, 2012Publication date: February 6, 2014Applicant: HOYA CORPORATIONInventor: Tomofumi Ohnishi