Patents by Inventor Masahisa Kousaka
Masahisa Kousaka 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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Publication number: 20180037722Abstract: An iso(thio)cyanate composition has excellent storage stability. The iso(thio)cyanate composition for an optical component includes an iso(thio)cyanate compound having two or more iso(thio)cyanate groups in a molecule, a phosphoric acid ester compound represented by general formula (1), and a phosphoric acid ester compound represented by general formula (2), a total amount of the phosphoric acid ester compounds being 1 ppm to 25,000 ppm, based on the mass of the iso(thio)cyanate compound.Type: ApplicationFiled: March 11, 2016Publication date: February 8, 2018Applicant: HOYA LENS THAILAND LTD.Inventors: Masahisa KOUSAKA, Natsumi TASAKI
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Publication number: 20170240683Abstract: A polymerizable composition which can suppress generation of turbidity, optical distortion, and striae in a transparent resin obtained therefrom, a transparent resin obtained from the polymerizable composition, an optical material containing the transparent resin, a plastic lens containing the optical material, and a method for manufacturing the transparent resin. A polymerizable composition of the present disclosure contains a polythiol compound having at least three mercapto groups and a polyiso(thio)cyanate compound having at least one aromatic ring. A thiol equivalent ratio which is a measured value of a thiol equivalent of the polythiol compound with respect to a theoretical value of the thiol equivalent is 0.975 or more and less than 1.000.Type: ApplicationFiled: September 9, 2015Publication date: August 24, 2017Applicant: HOYA LENS THAILAND LTD.Inventors: Takayuki IIJIMA, Masahisa KOUSAKA
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Publication number: 20170226268Abstract: A polymerizable composition which can suppress generation of turbidity, optical distortion, and striae in a transparent resin obtained therefrom, a transparent resin obtained from the polymerizable composition, an optical material containing the transparent resin, a plastic lens containing the optical material, and a method for manufacturing the transparent resin. The present disclosure is a polymerizable composition containing a polythiol compound having at least three mercapto groups and a polyiso(thio)cyanate compound. The polyiso(thio)cyanate compound contains only a polyiso(thio)cyanate compound having no aromatic ring, and a thiol equivalent ratio which is a measured value of a thiol equivalent of the polythiol compound with respect to a theoretical value of the thiol equivalent is 0.900 or more and less than 1.000.Type: ApplicationFiled: September 9, 2015Publication date: August 10, 2017Applicant: HOYA LENS THAILAND LTD.Inventors: Takayuki IIJIMA, Masahisa KOUSAKA
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Publication number: 20170137560Abstract: Provided are a polyisocyanate monomer composition for optical members, from which an optical members with which turbidity and clouding are difficult to occur during the production thereof, and which is excellent in transparency, can be obtained, and an optical member and production methods therefor.Type: ApplicationFiled: March 5, 2015Publication date: May 18, 2017Applicant: HOYA LENS THAILAND LTD.Inventors: Yuji HOSHI, Masahisa KOUSAKA
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Patent number: 9499656Abstract: Provided are a urethane optical member that has excellent transparency without turbidity or fog and a high refractive index, and a method for producing the same. A urethane optical member including at least one kind of structures represented by the formula (1) or (2) in a structure constituting the optical member, and a method for producing the same.Type: GrantFiled: June 12, 2013Date of Patent: November 22, 2016Assignee: HOYA CORPORATIONInventors: Yasuhisa Okamoto, Masahisa Kousaka
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Publication number: 20160215121Abstract: To provide a transparent plastic substrate having a high cut rate of blue light, a plastic lens and a transparent plastic member. A transparent plastic substrate containing a benzotriazole compound represented by the formula (1), a plastic lens containing the transparent plastic substrate, and a transparent plastic member containing a benzotriazole compound represented by the formula (1).Type: ApplicationFiled: September 29, 2014Publication date: July 28, 2016Applicant: HOYA LENS THAILAND LTD.Inventors: Masahisa KOUSAKA, Natsumi TASAKI
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Patent number: 9193831Abstract: The present invention relates to a urethane optical member containing at least one kind of structures represented by the following formulae (1) and (2) in a structure constituting the optical member, and a method for producing the same.Type: GrantFiled: August 20, 2012Date of Patent: November 24, 2015Assignee: HOYA CORPORATIONInventors: Masahisa Kousaka, Yasuhisa Okamoto
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Publication number: 20150166718Abstract: Provided are a urethane optical member that has excellent transparency without turbidity or fog and a high refractive index, and a method for producing the same. A urethane optical member including at least one kind of structures represented by the formula (1) or (2) in a structure constituting the optical member, and a method for producing the same.Type: ApplicationFiled: June 12, 2013Publication date: June 18, 2015Applicant: HOYA CORPORATIONInventors: Yasuhisa Okamoto, Masahisa Kousaka
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Patent number: 8895661Abstract: A plastic lens having excellent weather resistance, formed by polymerization of a composition containing a polyisocyanate compound having an aromatic ring and a polythiol compound is provided. The plastic lens is formed by polymerization of a composition that contains 100 parts by mass in total of (A) a polyisocyanate compound containing a polyisocyanate compound having an aromatic ring and (B) a polythiol compound, from 0.5 to 5.0 parts by mass of (C) a benzophenone compound having a hydroxyl group on at least the ortho position, and from 0.5 to 5.0 parts by mass of (D) a phenol compound.Type: GrantFiled: August 15, 2012Date of Patent: November 25, 2014Assignee: Hoya CorporationInventors: Shinsuke Itoh, Masahisa Kousaka
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Publication number: 20140296431Abstract: Provided is a method for producing a polyurethane lens by polymerizing a composition containing a polyisocyanate compound and a specific polythiol compound having high reactivity, in which the method suffers less increase in viscosity with the lapse of time and thus is excellent in workability. The method for producing a polyurethane lens, contains polymerizing a composition containing (A) a polyisocyanate compound, (B) a polythiol compound containing a polythiol compound that is obtained through esterification reaction of a polyol compound and thioglycolic acid, (C) a polymerization catalyst, and from 0.001 to 0.Type: ApplicationFiled: September 3, 2012Publication date: October 2, 2014Applicant: HOYA CORPORATIONInventor: Masahisa Kousaka
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Publication number: 20140243496Abstract: The present invention relates to a urethane optical member containing at least one kind of structures represented by the following formulae (1) and (2) in a structure constituting the optical member, and a method for producing the same.Type: ApplicationFiled: August 20, 2012Publication date: August 28, 2014Applicant: HOYA CORPORATIONInventors: Masahisa Kousaka, Yasuhisa Okamoto
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Publication number: 20140200323Abstract: A plastic lens having excellent weather resistance, formed by polymerization of a composition containing a polyisocyanate compound having an aromatic ring and a polythiol compound is provided. The plastic lens is formed by polymerization of a composition that contains 100 parts by mass in total of (A) a polyisocyanate compound containing a polyisocyanate compound having an aromatic ring and (B) a polythiol compound, from 0.5 to 5.0 parts by mass of (C) a benzophenone compound having a hydroxyl group on at least the ortho position, and from 0.5 to 5.0 parts by mass of (D) a phenol compound.Type: ApplicationFiled: August 15, 2012Publication date: July 17, 2014Applicant: Hoya CorporationInventors: Shinsuke Itoh, Masahisa Kousaka
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Patent number: 8398235Abstract: The present invention provides a plastic lens for spectacles wherein a transparent hardened coating layer containing a UV absorbing agent is formed on a peripheral edge of the plastic lens which has been subjected to edging or on a machined surface of the plastic lens which has been subjected to machining for attachment to a frame, a process for producing the plastic lens for spectacles, and an applicator suited for use in such a process. Discoloration of the peripheral edge of the edged plastic lens for spectacles or the machined surface of the plastic lens machined for attachment to a frame is prevented.Type: GrantFiled: December 7, 2007Date of Patent: March 19, 2013Assignee: Hoya CorporationInventor: Masahisa Kousaka
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Patent number: 8193303Abstract: A process for producing a plastic lens which comprises preparing a prepolymer comprising sulfur by bringing at least one compound having epithio group, sulfur and a portion of a polythiol compound into reaction with each other and, thereafter, adding rest of the polythiol compound to the prepared prepolymer comprising sulfur and allowing polymerization to proceed. A plastic lens of excellent quality which exhibits excellent weatherability in combination with a great refractive index, a great Abbe number and excellent transparency is produced.Type: GrantFiled: April 25, 2008Date of Patent: June 5, 2012Assignee: Hoya CorporationInventors: Shinsuke Itoh, Masahisa Kousaka
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Patent number: 7872093Abstract: A process for producing a polythiourethane resin which comprises (A) a step of synthesizing a polythiol oligomer having disulfide bond by reaction of a polythiol compound having a functionality of two or greater and sulfur and (B) a step of bringing the polythiol oligomer obtained in step (A) and a compound having poly(thio)isocyanate groups into reaction with each other, wherein step (A) is conducted in the absence of solvents using no catalysts or a catalyst substantially inert to the compound having poly(thio)isocyanate groups. A polythiol oligomer exhibiting a greater refractive index than that of the polythiol compound having a functionality of two or greater used as the starting material is produced at a low cost, and a process for producing a practically useful polythiourethane resin exhibiting a stable great refractive index and a great Abbe number is provided.Type: GrantFiled: August 31, 2007Date of Patent: January 18, 2011Assignee: Hoya CorporationInventor: Masahisa Kousaka
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Publication number: 20100201939Abstract: A plastic lens exhibiting excellent ability of absorbing ultraviolet light having a wavelength of about 400 nm, suppressed coloring and excellent transparency and a process for producing the plastic lens are provided. The plastic lens comprises a plastic lens substrate obtained by polymerizing a composition comprising (A) a lens material monomer, (B) a cobalt compound expressed by CoO.Al2O3 and/or Co.Al2O4, (C) fine particles of Au having an average diameter of 1 to 1,000 nm and (D) at least one ultraviolet light absorber selected from benzophenone-based ultraviolet light absorbers and benzotriazole-based ultraviolet light absorbers. The process comprises mixing Component (A), a dispersion of a cobalt compound which comprises Component (B), a dispersion of fine particles of Au which comprises Component (C) and Component (D), and polymerizing the obtained composition to prepare a plastic lens substrate.Type: ApplicationFiled: July 31, 2008Publication date: August 12, 2010Applicant: HOYA CORPORATIONInventors: Shinsuke Itoh, Masahisa Kousaka
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Publication number: 20100137555Abstract: A process for producing a plastic lens which comprises preparing a prepolymer comprising sulfur by bringing at least one compound having epithio group, sulfur and a portion of a polythiol compound into reaction with each other and, thereafter, adding rest of the polythiol compound to the prepared prepolymer comprising sulfur and allowing polymerization to proceed. A plastic lens of excellent quality which exhibits excellent weatherability in combination with a great refractive index, a great Abbe number and excellent transparency is produced.Type: ApplicationFiled: April 25, 2008Publication date: June 3, 2010Applicant: Hoya CorporationInventors: Shinsuke Itoh, Masahisa Kousaka
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Publication number: 20100014048Abstract: The present invention provides a plastic lens for spectacles wherein a transparent hardened coating layer containing a UV absorbing agent is formed on a peripheral edge of the plastic lens which has been subjected to edging or on a machined surface of the plastic lens which has been subjected to machining for attachment to a frame, a process for producing the plastic lens for spectacles, and an applicator suited for use in such a process. Discoloration of the peripheral edge of the edged plastic lens for spectacles or the machined surface of the plastic lens machined for attachment to a frame is prevented.Type: ApplicationFiled: December 7, 2007Publication date: January 21, 2010Applicant: HOYA CORPORATIONInventor: Masahisa Kousaka
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Publication number: 20090259001Abstract: A process for producing a polythiourethane resin which comprises (A) a step of synthesizing a polythiol oligomer having disulfide bond by reaction of a polythiol compound having a functionality of two or greater and sulfur and (B) a step of bringing the polythiol oligomer obtained in step (A) and a compound having poly(thio)isocyanate groups into reaction with each other, wherein step (A) is conducted in the absence of solvents using no catalysts or a catalyst substantially inert to the compound having poly(thio)isocyanate groups. A polythiol oligomer exhibiting a greater refractive index than that of the polythiol compound having a functionality of two or greater used as the starting material is produced at a low cost, and a process for producing a practically useful polythiourethane resin exhibiting a stable great refractive index and a great Abbe number is provided.Type: ApplicationFiled: August 31, 2007Publication date: October 15, 2009Applicant: Hoya CorporationInventor: Masahisa Kousaka
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Publication number: 20090202706Abstract: Even when the optical surface (2a, 2b) of a spectacle lens (1) is a machined surface, a machining trace can be erased, so no machining trace is visually observed during inspection. The step of applying a coating film solution, made of a material which is the same as that of a lens base material, on the optical surface (2a, 2b) of the spectacle lens (1) which is a machined surface, and the step of forming a coating film (4) by hardening, by heating, the coating film solution applied to the optical surface (2a, 2b) are provided. The steps of forming a hard coating film (5) on the film (4) and an antireflection film (6) on the hard coating film (5) are also provided.Type: ApplicationFiled: June 1, 2007Publication date: August 13, 2009Inventors: Masahisa Kousaka, Hideo Toriumi, Keigo Hasegawa