Patents by Inventor Takashige Maekawa
Takashige Maekawa 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: 8609795Abstract: A water and oil repellent composition having excellent durability, which can impart excellent water and oil repellency to an object, even in a process at low temperatures, and which enables water and oil repellent treatment providing a soft hand. A water and oil repellent composition which comprises, as an essential component, a copolymer containing polymerization units of the following monomer (a) and polymerization units of the following monomer (b): monomer (a): an Rf group-containing monomer which forms a photopolymer having no melting point or a melting point of at most 55° C. attributable to fine crystals derived from the Rf groups and having a glass transition point of at least 20° C. monomer (b): a monomer having no Rf group and having a cross-linkable functional group.Type: GrantFiled: November 15, 2007Date of Patent: December 17, 2013Assignee: Asahi Glass Company, LimitedInventors: Shuichiro Sugimoto, Minako Shimada, Toyomichi Shimada, Ryuji Seki, Takashige Maekawa
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Patent number: 8598291Abstract: Antifouling composition containing a fluorocopolymer which contains from 30 to 70 mass % of polymerized units (a?) having a C1-6 perfluoroalkyl group, from 20 to 69 mass % of polymerized units (b?) having an alkylene oxide chain and from 1 to 10 mass % of polymerized units (c?) having an amino group, and which has anionic groups at its main chain terminals. Method of making.Type: GrantFiled: November 27, 2009Date of Patent: December 3, 2013Assignee: Asahi Glass Company, LimitedInventors: Hiroyuki Hara, Shuichiro Sugimoto, Takao Hirono, Takashige Maekawa
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Patent number: 8557939Abstract: To provide an antifouling composition which is a fluorine-type antifouling composition using a short chain perfluoroalkyl group and which is excellent in antifouling properties and water/oil repellency and presents good durability against washing. An antifouling composition comprising a fluorocopolymer which comprises from 30 to 65 mass % of polymerized units (a) having a C1-6 perfluoroalkyl group, from 1 to 67 mass % of polymerized units (b1) having —(C2H4O)— and from 3 to 34 mass % of polymerized units (b2) having —(C4H8O)—, wherein the content of —(C2H4O)— is from 20 to 65 mass %, and the content of —(C4H8O)— is from 2 to 13 mass %.Type: GrantFiled: November 20, 2009Date of Patent: October 15, 2013Assignee: Asahi Glass Company, LimitedInventors: Hiroyuki Hara, Shuichiro Sugimoto, Takao Hirono, Takashige Maekawa
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Publication number: 20100076168Abstract: To provide an antifouling composition which is an fluorine-type antifouling composition using a short chain perfluoroalkyl group and which can be made in the form of an aqueous dispersion containing substantially no volatile organic solvent and has excellent soil release properties. An antifouling composition comprising a fluorocopolymer which comprises from 30 to 70 mass % of polymerized units (a?) having a C1-6 perfluoroalkyl group, from 20 to 69 mass % of polymerized units (b?) having an alkylene oxide chain and from 1 to 10 mass % of polymerized units (c?) having an amino group, and which has anionic groups at its main chain terminals.Type: ApplicationFiled: November 27, 2009Publication date: March 25, 2010Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Hiroyuki Hara, Shuichiro Sugimoto, Takao Hirono, Takashige Maekawa
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Publication number: 20100069565Abstract: To provide an antifouling composition which is a fluorine-type antifouling composition using a short chain perfluoroalkyl group and which is excellent in antifouling properties and water/oil repellency and presents good durability against washing. An antifouling composition comprising a fluorocopolymer which comprises from 30 to 65 mass % of polymerized units (a) having a C1-6 perfluoroalkyl group, from 1 to 67 mass % of polymerized units (b1) having —(C2H4O)— and from 3 to 34 mass % of polymerized units (b2) having —(C4H8O)—, wherein the content of —(C2H4O)— is from 20 to 65 mass %, and the content of —(C4H8O)— is from 2 to 13 mass %.Type: ApplicationFiled: November 20, 2009Publication date: March 18, 2010Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Hiroyuki HARA, Shuichiro Sugimoto, Takao Hirono, Takashige Maekawa
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Patent number: 7485688Abstract: The present invention provides a water and oil proofing composition which imparts excellent water and oil resistance and comprises a fluorocopolymer comprising polymerized units of (Z-Y)nX (wherein Z: a C1-6 perfluoroalkyl group or the like, Y: an alkylene group or the like, n: 1 or 2, X: a polymerizable unsaturated group), polymerized units of CH2?CR1-G-(R2O)q—R3 (wherein R1: a hydrogen atom or the like, R2: a C2-4 alkylene group or the like, q: an integer of from 1 to 50, G: —COO(CH2)r— (r: an integer of from 0 to 4), R3: a hydrogen atom or the like, and polymerized units of CH2?CR4-M-Q-NR5R6 (wherein R4: a hydrogen atom or the like, Q: a C2-4 alkylene group or the like, R5 and R6: C1-8 alkyl groups or the like) and an aqueous medium.Type: GrantFiled: September 22, 2006Date of Patent: February 3, 2009Assignee: Asahi Glass Company, LimitedInventors: Takashige Maekawa, Shuichiro Sugimoto, Minako Shimada, Kyouichi Kaneko, Harutaka Naruse, Yuuichi Nakajima
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Publication number: 20080188606Abstract: To provide a stable aqueous surface treating agent for architectural/civil engineering structures, which can impart excellent water repellency and oil repellency (water proofness and oil proofness), antifouling properties, weather resistance and durability thereof to structures made of architectural/civil engineering materials such as stones or concrete, particularly porous materials. The aqueous surface treating agent comprises at least one fluoropolymer (A) selected from a polyfluoroalkyl group-containing poly(meth)acrylate (A1) and a polyfluoroalkyl group-containing polyurethane (A2) in an aqueous medium. The aqueous surface treating agent usually contains a surfactant (B), and preferably contains a silicone (C), and further (D) a silane compound having a hydrolyzable group and/or a partially hydrolyzed condensate of a silane compound having a hydrolyzable group.Type: ApplicationFiled: February 28, 2008Publication date: August 7, 2008Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Shigenori Asada, Hitoshi Ibuki, Takashige Maekawa, Kazunori Sugiyama
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Publication number: 20080076862Abstract: A water and oil repellent composition having excellent durability, which can impart excellent water and oil repellency to an object, even in a process at low temperatures, and which enables water and oil repellent treatment providing a soft hand. A water and oil repellent composition which comprises, as an essential component, a copolymer containing polymerization units of the following monomer (a) and polymerization units of the following monomer (b): monomer (a): an Rf group-containing monomer which forms a photopolymer having no melting point or a melting point of at most 55° C. attributable to fine crystals derived from the Rf groups and having a glass transition point of at least 20° C. monomer (b): a monomer having no Rf group and having a cross-linkable functional group.Type: ApplicationFiled: November 15, 2007Publication date: March 27, 2008Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Shuichiro Sugimoto, Minako Shimada, Toyomichi Shimada, Ryuji Seki, Takashige Maekawa
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Patent number: 7262243Abstract: To provide a coating composition useful to form an antireflection film having a refractive index lower than 1.4, excellent in water solubility and long-term stability in the form of a water solution. A coating composition containing a fluoropolymer having ionic functional groups (such as a fluoropolymer having polymer units of —CF2CF[O(CF2)3COOH]—), an acid and an aqueous medium.Type: GrantFiled: July 28, 2005Date of Patent: August 28, 2007Assignee: Asahi Glass Company, LimitedInventors: Nobuyuki Otozawa, Toyomichi Shimada, Takashige Maekawa, Naoko Sumi
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Publication number: 20070015867Abstract: The present invention provides a water and oil proofing composition which imparts excellent water and oil resistance. A composition which comprises a fluorocopolymer comprising polymerized units of (Z-Y)nX (wherein Z: a C1-6 perfluoroalkyl group or the like, Y: an alkylene group or the like, n: 1 or 2, X: a polymerizable unsaturated group), polymerized units of CH2?CR1-G-(R2O)q—R3 (wherein R1: a hydrogen atom or the like, R2: a C2-4 alkylene group or the like, q: an integer of from 1 to 50, G: —COO(CH2)r— (r: an integer of from 0 to 4), R3: a hydrogen atom or the like) and polymerized units of CH2?CR4-M-Q-NR5R6 (wherein R4: a hydrogen atom or the like, Q: a C2-4 alkylene group or the like, R5 and R6: C1-8 alkyl groups or the like) and an aqueous medium.Type: ApplicationFiled: September 22, 2006Publication date: January 18, 2007Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Takashige Maekawa, Shuichiro Sugimoto, Minako Shimada, Kyouichi Kaneko, Harutaka Naruse, Yuuichi Nakajima
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Publication number: 20060004129Abstract: To provide a coating composition useful to form an antireflection film having a refractive index lower than 1.4, excellent in water solubility and long-term stability in the form of a water solution. A coating composition containing a fluoropolymer having ionic functional groups (such as a fluoropolymer having polymer units of —CF2CF[O(CF2)3COOH]—), an acid and an aqueous medium.Type: ApplicationFiled: July 28, 2005Publication date: January 5, 2006Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Nobuyuki Otozawa, Toyomichi Shimada, Takashige Maekawa, Naoko Sumi
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Publication number: 20050267241Abstract: A water and oil repellent composition having excellent durability, which can impart excellent water and oil repellency to an object, even in a process at low temperatures, and which enables water and oil repellent treatment providing a soft hand. A water and oil repellent composition which comprises, as an essential component, a copolymer containing polymerization units of the following monomer (a) and polymerization units of the following monomer (b): monomer (a): an Rf group-containing monomer which forms a photopolymer having no melting point or a melting point of at most 55° C. attributable to fine crystals derived from the Rf groups and having a glass transition point of at least 20° C. monomer (b): a monomer having no Rf group and having a cross-linkable functional group.Type: ApplicationFiled: April 15, 2005Publication date: December 1, 2005Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Shuichiro Sugimoto, Minako Shimada, Toyomichi Shimada, Ryuji Seki, Takashige Maekawa
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Patent number: 6933338Abstract: To provide a water- and oil-repellent composition excellent in durability and excellent in safety and preservation of the environment. A water- and oil-repellent composition which comprises (A) a polymer, (B) an aqueous medium and (C) a surfactant in a mass ratio of (A)/(B)/(C)=100/100-500/1-10, the polymer (A) containing a polymerization unit based on a (meth)acrylate having a polyfluoroalkyl group, a polymerization unit based on an alkyl(meth)acrylate having a C1-C12 alkyl group, a polymerization unit based on an alkyl(meth)acrylate having a C16-C22 alkyl group and a polymerization unit based on a specific compound having a blocked isocyanate group.Type: GrantFiled: October 27, 2003Date of Patent: August 23, 2005Assignee: Asahi Glass Company, LimitedInventors: Shuichiro Sugimoto, Takashige Maekawa
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Patent number: 6872324Abstract: An aqueous dispersion comprising a polymer (a) having a repeating unit (A) which comprises four carbon atoms connected in a linear chain and which has one double bond at the second position and a polyfluoroalkyl group bonded to an arbitrary carbon atom, and a surfactant (B) having a hydrophile-lipophile balance of at least 10, wherein the polymer (a) is dispersed in an aqueous medium by the surfactant (B).Type: GrantFiled: January 30, 2003Date of Patent: March 29, 2005Assignee: Asahi Glass Company, LimitedInventors: Takashige Maekawa, Minako Shimada, Ryuji Seki, Taiki Hoshino
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Patent number: 6860926Abstract: The following fluorine-containing compound is presented which is capable of providing dry soil resistance when incorporated to a water and oil repellent. Rf1R2OCOCH2CHR1COOR3Rf2 (wherein each of Rf1 and Rf2 which are independent of each other, is a C3-22 polyfluoroalkyl group, R1 is a hydrogen atom or a C1-10 alkyl group, and each of R2 and R3 which are independent of each other, is a C1-4 alkylene group, etc.).Type: GrantFiled: October 15, 2001Date of Patent: March 1, 2005Assignee: Asahi Glass Company, LimitedInventors: Minako Ishikawa, Takashige Maekawa, Ryuji Seki, Shoji Furuta, Kazuya Oharu
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Patent number: 6767946Abstract: A water and oil repellent composition comprising a compound of the following formula (1) and a thermoplastic polymer, as essential components: where the symbols in the formula (1) have the following meanings: Rf: a C1-20 polyfluoroalkyl group, X: (CH2)m, wherein m is an integer of from 1 to 10, A, A1, A2: each independently, O, S or N(Z3), wherein Z3 is a hydrogen atom or an alkyl group, Z1: an octadecyl group, Z2: an alkyl group, or an alkyl group having at least one hydrogen atom substituted, W: a trivalent organic group, and a, b: each independently, 1 or 2, provided that a+b is 2 or 3.Type: GrantFiled: September 24, 2002Date of Patent: July 27, 2004Assignee: Asahi Glass Company, LimitedInventors: Toyomichi Shimada, Masako Tada, Takashige Maekawa
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Publication number: 20040087695Abstract: To provide a water- and oil-repellent composition excellent in durability and excellent in safety and preservation of the environment.Type: ApplicationFiled: October 27, 2003Publication date: May 6, 2004Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Shuichiro Sugimoto, Takashige Maekawa
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Patent number: 6716944Abstract: A water and oil repellent composition which can impart an excellent water and oil repellency to an object, even if it is processed at a low temperature, and which can achieve a water and oil repellent treatment providing a soft hand. The water and oil repellent composition which has as an essential component a copolymer consisting essentially of polymerized units of the following monomer (a) and polymerized units of the following monomer (b). monomer (a): an Rf monomer wherein the melting point of fine crystals derived from the Rf groups of the homopolymer does not exist or is at most 50° C. monomer (b): a monomer having no Rf group, wherein the melting point of fine crystals derived from the side chains of the homopolymer is at least 30° C.Type: GrantFiled: December 13, 2002Date of Patent: April 6, 2004Assignee: Asahi Glass Company, LimitedInventors: Takashige Maekawa, Minako Shimada, Shuichiro Sugimoto, Ryuji Seki
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Patent number: 6653376Abstract: A water dispersion type water and oil repellent composition which is capable of imparting durable water resistance to clothing for which high water and oil repellency is required and which is capable of imparting high oil repellency to paper. The water dispersion type water and oil repellent composition comprises 1) an aqueous medium, 2) a polymer of a monomer having a polyfluoroalkyl group and one polymerizable unsaturated group and 3) a mono(or poly)ol or an alkylene oxide thereof, as essential components.Type: GrantFiled: January 21, 2000Date of Patent: November 25, 2003Assignee: Asahi Glass Company Ltd.Inventors: Shuichiro Sugimoto, Kyouichi Kaneko, Takashige Maekawa, Minako Shindo
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Patent number: 6624268Abstract: A water and oil repellent aqueous dispersion is provided which is excellent in water and oil repellency and waterdrop rolling property and has dispersion stability even in the presence of co-agents and contaminants in the treatment bath. A preparative process comprises emulsifying a stock composition containing a polymerizable monomer containing a (meth)acrylate having perfluoroalkyl group as an essential component, a non-fluorine type surfactant containing no aromatic group, water and a solvent having a viscosity of at least 3 cP at 25° C. under pressure and polymerizing the stock composition.Type: GrantFiled: June 26, 2001Date of Patent: September 23, 2003Assignee: Asahi Glass Company, LimitedInventors: Takashige Maekawa, Kazuya Oharu, Shuichiro Sugimoto