Patents by Inventor Takeo Shigemoto
Takeo Shigemoto 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: 8242202Abstract: The invention relates to a curable liquid resin composition comprising the following components (A), (B), and (C): (A) a urethane (meth)acrylate oligomer, (B) a monomer shown by the following formula (1), CH2?CR1COOR2 (1) wherein R1 represents a hydrogen atom or a methyl group and R2 represents a monovalent organic group, 40 wt % or more of the total amount of the component (B) being a monomer in which the R2 group in the formula (1) is a nonpolar organic group, and the monomer in the component (B) in which the R2 group in the formula (1) is a nonpolar organic group being hereinafter referred to as “nonpolar (meth)acrylate-containing monomer”, and (C) a polymerization initiator.Type: GrantFiled: March 15, 2005Date of Patent: August 14, 2012Assignees: DSM IP Assets B.V., JSR CorporationInventors: Hiroshi Yamaguchi, Satoshi Kamo, Takeo Shigemoto, Zen Komiya
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Publication number: 20110150410Abstract: A curable liquid resin optical fiber coating composition comprising 0.1 to 10 wt %, relative to the total weight of the composition, of an alkoxysilane compound (A) which does not contain a radically polymerizable functional group, and 0.01 to 1 wt %, relative to the total weight of the composition, of a hindered amine compound (B). This curable liquid resin composition produces a cured product that ensures a high n-value of the coated optical fiber and an excellent fiber strength after coating removal.Type: ApplicationFiled: February 18, 2011Publication date: June 23, 2011Applicants: DSM IP ASSETS B.V., JSR CORPORATIONInventors: Shuichi Sugawara, Hiroshi Miyazawa, Masahito Mase, Takeo Shigemoto
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Patent number: 7906566Abstract: The invention relates to a curable liquid resin composition comprising: (A) a urethane(meth)acrylate having a structure originating from a polyol and a number average molecular weight of 800 g/mol or more, but less than 6,000 g/mol, and (B) a urethane(meth)acrylate having a structure originating from a polyol and a number average molecular weight of 6,000 g/mol or more, but less than 20,000 g/mol, wherein the total amount of the component (A) and component (B) is 20-95 wt % of the curable liquid resin composition and the content of the component (B) is 0.1-30 wt % of the total of the component (A) and component (B).Type: GrantFiled: September 17, 2004Date of Patent: March 15, 2011Assignee: DSM IP Assets B.V.Inventors: Masanobu Sugimoto, Satoshi Kamo, Takeo Shigemoto, Zen Komiya, Paulus Antonius Maria Steeman
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Patent number: 7532795Abstract: The invention relates to a radiation-curable liquid resin composition comprising: (A) 20-90 wt % of a urethane(meth)acrylate oligomer, and (B) 1-35 wt % of a monomer shown by the following formula (1), wherein R1 represents a hydrogen atom or a methyl group, R2 and R3 individually represent a hydrogen atom or an alkyl group having 1-4 carbon atoms, R4 represents a hydrogen atom or a methyl group, and n represents an integer of 1-6, or a monomer including a hydroxyl group.Type: GrantFiled: August 20, 2004Date of Patent: May 12, 2009Assignees: DSM IP Assets B.V., JSR CorporationInventors: Atsuya Takahashi, Takeo Shigemoto, Zen Komiya, Hiroki Ohara
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Patent number: 7493000Abstract: The present invention provides a curable liquid resin composition which, when cured, exhibits excellent removability from an adjacent coating layer and is suitable for an optical fiber upjacket material. The curable liquid resin optical fiber upjacket composition comprising a urethane (meth)acrylate or a (meth)acrylate oligomer, a reactive diluent, a polymerization initiator, and a polyol compound having a molecular weight of 1500 or more.Type: GrantFiled: August 30, 2005Date of Patent: February 17, 2009Assignees: DSM IP Assets B.V., JSR CorporationInventors: Hiroshi Yamaguchi, Satoshi Kamo, Masanobu Sugimoto, Takeo Shigemoto, Kenneth Dake
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Publication number: 20080287605Abstract: A curable liquid resin optical fiber coating composition comprising 0.1 to 10 wt %, relative to the total weight of the composition, of an alkoxysilane compound (A) which does not contain a radically polymerizable functional group, and 0.01 to 1 wt %, relative to the total weight of the composition, of a hindered amine compound. (B). This curable liquid resin composition produces a cured product that ensures a high n-value of the coated optical fiber and an excellent fiber strength after coating removal.Type: ApplicationFiled: March 10, 2006Publication date: November 20, 2008Inventors: Shuichi Sugawara, Hiroshi Miyazawa, Masahito Mase, Takeo Shigemoto
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Publication number: 20080254288Abstract: The invention relates to a curable liquid resin composition comprising the following components (A), (B), and (C): (A) a urethane (meth)acrylate oligomer, (B) a monomer shown by the following formula (1), CH2?CR1COOR2 (1) wherein R1 represents a hydrogen atom or a methyl group and R2 represents a monovalent organic group, 40 wt % or more of the total amount of the component (B) being a monomer in which the R2 group in the formula (1) is a nonpolar organic group, and the monomer in the component (B) in which the R2 group in the formula (1) is a nonpolar organic group being hereinafter referred to as “nonpolar (meth)acrylate-containing monomer”, and (C) a polymerization initiator.Type: ApplicationFiled: March 15, 2005Publication date: October 16, 2008Inventors: Hiroshi Yamaguchi, Satoshi Kamo, Takeo Shigemoto, Zen Komiya
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Publication number: 20080219635Abstract: The present invention provides a curable liquid resin composition which, when cured, exhibits excellent removability from an adjacent coating layer and is suitable for an optical fiber upjacket material. The curable liquid resin optical fiber upjacket composition comprising a urethane (meth)acrylate or a (meth)acrylate oligomer, a reactive diluent, a polymerization initiator, and a polyol compound having a molecular weight of 1500 or more.Type: ApplicationFiled: August 30, 2005Publication date: September 11, 2008Inventors: Hiroshi Yamaguchi, Satoshi Kamo, Masanobu Sugimoto, Takeo Shigemoto, Kenneth Dake
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Publication number: 20080167432Abstract: The invention aims to provide a curable liquid resin composition which produces a cured product having excellent surface slip characteristics and printability and has excellent liquid resin stability. This problem is solved by providing a curable liquid resin composition, comprising a silicone including an alkyl-modified siloxane unit and a polyether-modified siloxane unit.Type: ApplicationFiled: March 15, 2005Publication date: July 10, 2008Applicants: DSMIP ASSETS B.V., JSR CORPORATIONInventors: Hiroki Ohara, Tsuyoshi Furukawa, Takeo Shigemoto, Zen Komiya
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Publication number: 20080125546Abstract: The present invention provides a curable liquid resin composition which, when cured, exhibits excellent removability from an adjacent coating layer and is suitable as an optical fiber upjacket material. The curable liquid resin optical fiber upjacket composition comprising a urethane(meth)acrylate or a (meth)acrylate oligomer containing two or more (meth)acryloyl groups, a reactive diluent, a polymerization initiator, and a urethane(meth)acrylate compound containing at least one (meth)acryloyl group and selected from (D1) to (D4) shown by the following general formula (1). (DI) In the formula (1), R1 represents a methyl group, R2 and R3 individually represent a divalent organic group, and R4 represents a monovalent organic group. (D2) In the formula (1), R1 represents a hydrogen atom, R2 and R3 individually represent divalent organic groups, and R4 represents a polyol residue having a molecular weight of 1500 or more.Type: ApplicationFiled: September 15, 2005Publication date: May 29, 2008Inventors: Hiroshi Yamaguchi, Satoshi Kamo, Masanobu Sugimoto, Takeo Shigemoto, Edward Joseph Murphy
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Publication number: 20080045623Abstract: The present invention provides a curable liquid resin composition that when cured, exhibits excellent removability from an adjacent coating layer and low cure shrinkage rate and coefficient of linear expansion. This composition is suitable for an optical fiber upjacket material. The curable liquid resin optical fiber upjacket composition comprising a urethane (meth)acrylate, a monofunctional radiation-curable monomer, a polyfunctional radiation-curable monomer and inorganic particles or polymer particles having an average particle size of 0.1 to 100 ?m.Type: ApplicationFiled: August 30, 2005Publication date: February 21, 2008Inventors: Hiroshi Yamaguchi, Satoshi Kamo, Masanobu Sugimoto, Takeo Shigemoto
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Publication number: 20070246687Abstract: The present invention provides a curable liquid resin composition which, when cured, exhibits excellent removability from an adjacent coating layer as well as small deterioration when exposed under high-temperature and humidity condition and which is suitable for an optical fiber upjacket material. The curable liquid resin optical fiber upjacket composition comprising a urethane (meth)acrylate or a (meth)acrylate oligomer, a reactive diluent, a polymerization initiator, and a silicone compound having an average molecular weight of 1250 to 35000.Type: ApplicationFiled: August 30, 2005Publication date: October 25, 2007Inventors: Hiroshi Yamaguchi, Satoshi Kamo, Masanobu Sugimoto, Takeo Shigemoto, Kenneth Dake
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Publication number: 20070203258Abstract: The invention relates to a curable liquid resin composition comprising: (A) a urethane(meth)acrylate having a structure originating from a polyol and a number average molecular weight of 800 g/mol or more, but less than 6,000 g/mol, and (B) a urethane(meth)acrylate having a structure originating from a polyol and a number average molecular weight of 6,000 g/mol or more, but less than 20,000 g/mol, wherein the total amount of the component (A) and component (B) is 20-95 wt % of the curable liquid resin composition and the content of the component (B) is 0.1-30 wt % of the total of the component (A) and component (B).Type: ApplicationFiled: September 17, 2004Publication date: August 30, 2007Inventors: Masanobu Sugimoto, Satoshi Kamo, Takeo Shigemoto, Zen Komiya, Paulus Steeman
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Publication number: 20070191505Abstract: The invention relates to a radiation-curable liquid resin composition comprising: (A) 20-90 wt % of a urethane (meth)acrylate oligomer, and (B) 1-35 wt % of a monomer shown by the following formula (1), wherein R1 represents a hydrogen atom or a methyl group, R2 and R3 individually represent a hydrogen atom or an alkyl group having 1-4 carbon atoms, R4 represents a hydrogen atom or a methyl group, and n represents an integer of 1-6, or a monomer including a hydroxyl group.Type: ApplicationFiled: August 20, 2004Publication date: August 16, 2007Inventors: Atsuya Takahashi, Takeo Shigemoto, Zen Komiya, Hiroki Ohara
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Publication number: 20050272829Abstract: This invention relates to a curable liquid resin composition comprising: (a) 5-94 parts by weight of a urethane (meth)acrylate comprising a polyether backbone, at least one urethane group and at least one (meth)acrylate end group (b) 5-94 parts by weight of a polymerizable monomer, and; (c) 0.01-10 parts by weight of a photoinitiator, in 100 parts by weight of the curable liquid resin composition, wherein the cured product of the composition has a glass transition temperature between 30 and 85° C. or less and a stress relaxation time of 30 minutes or less.Type: ApplicationFiled: March 27, 2003Publication date: December 8, 2005Inventors: Masanobu Sugimoto, Hideki Sugimoto, Takeo Shigemoto, Zen Komiya, Takashi Ukachi