Patents by Inventor Ryuji Seki
Ryuji Seki 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).
-
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
-
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
-
Publication number: 20050004337Abstract: A process for producing a polyfluoroalkyl (meth)acrylate, which comprises isolating, from a reaction mixture containing a polyfluoroalkyl (meth)acrylate obtained by reacting a polyfluoroalkyl iodide of the formula CnF2n+1(CH2)mI (wherein n is an integer of from 2 to 7, and m is an integer of from 1 to 4) with a metal (meth)acrylate in tert-butanol, said polyfluoroalkyl (meth)acrylate by the following steps (1) to (3): (1) a step of taking out a crude liquid from the reaction mixture by solid-liquid separation; (2) a step of distilling the crude liquid to separate it into compound group A of compounds having a lower boiling point than the polyfluoroalkyl (meth)acrylate and compound group B of the polyfluoroalkyl (meth)acrylate and compounds having a higher boiling point than the polyfluoroalkyl (meth)acrylate; and (3) a step of distilling and purifying the polyfluoroalkyl (meth)acrylate from the compound group B in the presence of a polymerization inhibitor.Type: ApplicationFiled: June 3, 2004Publication date: January 6, 2005Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Shoji Furuta, Taiki Hoshino, Ryuji Seki
-
Patent number: 6720371Abstract: A water repellent and oil resistant composition capable of imparting excellent water repellency and oil resistance to paper even under a condition of drying at a low temperature for a short time, is provided. The composition comprising a fluorocopolymer (A) obtained by polymerizing a polyfluoroalkyl group-containing (meth)acrylate, vinylidene chloride and a compound of the formula [CH2═C(R)COO—CH2—CH(OH)CH2N+(CH3)3·X− (R: a hydrogen atom or a methyl group, and X−: a counter ion)] or the like by means of a lipophilic polymerization initiator (E) having a solubility of less than 3 g in 100 g of water, a non-fluorine surfactant (B), a medium (C) and a water-soluble polymer (D) (a polyacrylamide, a polyvinyl alcohol or starch).Type: GrantFiled: June 10, 2002Date of Patent: April 13, 2004Assignee: Asahi Glass Company, LimitedInventors: Shoji Furuta, Ryuji Seki, Hiroshi Funaki
-
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
-
Publication number: 20030176572Abstract: 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: ApplicationFiled: January 30, 2003Publication date: September 18, 2003Applicant: Asahi Glass Company, LimitedInventors: Takashige Maekawa, Minako Shimada, Ryuji Seki, Taiki Hoshino
-
Publication number: 20030130457Abstract: 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).Type: ApplicationFiled: December 13, 2002Publication date: July 10, 2003Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Takashige Maekawa, Minako Shimada, Shuichiro Sugimoto, Ryuji Seki
-
Publication number: 20030040568Abstract: A water repellent and oil resistant composition capable of imparting excellent water repellency and oil resistance to paper even under a condition of drying at a low temperature for a short time, is provided.Type: ApplicationFiled: June 10, 2002Publication date: February 27, 2003Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Shoji Furuta, Ryuji Seki, Hiroshi Funaki
-
Patent number: 6447588Abstract: A water dispersion type water and oil repellent composition which undergoes little change in viscosity even if freezing/thawing cycles are repeated and which is excellent in storage stability. The dispersion is capable of imparting excellent water and oil resistance to paper. A water dispersion type water and oil repellant composition contains a compound which is mixable with water and has a flash point of from 50 to 150° C. A polyfluoroalkyl group-containing phosphate may be incorporated into the mixture.Type: GrantFiled: December 28, 2000Date of Patent: September 10, 2002Assignee: Asahi Glass Company, LimitedInventors: Hiroshi Funaki, Ryuji Seki
-
Publication number: 20020060304Abstract: The following fluorine-containing compound is presented which is capable of providing dry soil resistance when incorporated to a water and oil repellent.Type: ApplicationFiled: October 15, 2001Publication date: May 23, 2002Applicant: Asahi Glass Company, LimitedInventors: Minako Ishikawa, Takashige Maekawa, Ryuji Seki, Shoji Furuta, Kazuya Oharu
-
Patent number: 6306944Abstract: A composition for treating paper comprising a polymer (A), a surfactant (B) and a medium (C), wherein said polymer (A) comprises polymer units of (meth)acrylate having a polyfluoroalkyl group, polymer units of a vinylidene halide and/or polymer units of a long chain alkyl(meth)acrylate, and polymer units of the following formula 1: —[CH2—C(R)[CO—Q—(CH2)nCHR4—CH2N+(R1)(R2)(R3).X−]]—, Formula 1 wherein R is a hydrogen atom or a methyl group; Q is —O— or —NR5—, wherein R5 is a hydrogen atom or an alkyl group; each of R1, R2 and R3 which are independent of one another is a hydrogen atom or an alkyl group; R1 and R2 may together form a bivalent organic group; R4 is a hydrogen atom or a hydroxyl group; n is a number from 1 to 4 and X− is a counter ion.Type: GrantFiled: November 23, 1999Date of Patent: October 23, 2001Assignee: Asahi Glass Company Ltd.Inventor: Ryuji Seki
-
Patent number: 5763709Abstract: A method for producing a hydrofluorocarbon of the formula H.sub.n R.sub.f H wherein n is 0 or 1, and when n is 0, R.sub.f is a C.sub.2-12 linear or branched polyfluoroalkyl group, and when n is 1, R.sub.f is a C.sub.2-12 linear or branched polyfluoroalkylene group, which comprises reacting an iodofluorocarbon of the formula I.sub.n R.sub.f I wherein n and R.sub.f are as defined above, with a reducing agent in a gas phase.Type: GrantFiled: December 23, 1996Date of Patent: June 9, 1998Assignee: Asahi Glass Company Ltd.Inventors: Kazuya Oharu, Ryuji Seki, Seisaku Kumai
-
Patent number: 5648568Abstract: A method for producing a hydrofluorocarbon of the formula H.sub.n R.sub.f H wherein n is 0 or 1, and when n is 0, R.sub.f is a C.sub.2-12 linear or branched polyfluoroalkyl group, and when n is 1, R.sub.f is a C.sub.2-12 linear or branched polyfluoroalkylene group, which comprises reacting an iodofluorocarbon of the formula I.sub.n R.sub.f I wherein n and R.sub.f are as defined above, with hydrogen at a temperature of not higher than 450.degree. C. in a gas phase.Type: GrantFiled: June 5, 1995Date of Patent: July 15, 1997Assignee: Asahi Glass Company Ltd.Inventors: Kazuya Oharu, Ryuji Seki, Seisaku Kumai
-
Patent number: 5648504Abstract: A process for producing tetrafluorophthalic anhydride, which comprises chlorinating tetrachlorophthalic anhydride to obtain 3,3,4,5,6,7-hexachloro-1-[3H]-isobenzofuranone, then fluorinating it to obtain 3,4,5,6-tetrafluorophthaloyldifluoride and/or 3,3,4,5,6,7-hexafluoro-1-[3]-isobenzofuranone, and further reacting the tetrafluorophthalolyldifluoride and/or the hexafluoro-1-[3H]-isobenzofuranone with an inorganic base or an organic acid to obtain tetrafluorophthalic anhydride.Type: GrantFiled: February 13, 1996Date of Patent: July 15, 1997Assignee: Asahi Glass Company Ltd.Inventors: Ryuji Seki, Koji Sugimoto, Seisaku Kumai
-
Patent number: 5618986Abstract: A method for producing a hydrofluorocarbon of the formula a H.sub.n R.sub.f H wherein n is 0 or 1, and when n is 0, R.sub.f is a C.sub.2-12 linear or branched polyfluoroalkyl group, and when n is 1, R.sub.f is a C.sub.2-12 linear or branched polyfluoroalkylene group, which comprises reacting an iodofluorocarbon of the formula I.sub.n R.sub.f I wherein n and R.sub.f are as defined above, with an alkali metal hydroxide under action of an alcohol mixture comprising a primary alcohol and a secondary alcohol.Type: GrantFiled: May 3, 1996Date of Patent: April 8, 1997Assignee: Asahi Glass Company Ltd.Inventors: Kazuya Oharu, Ryuji Seki, Seisaku Kumai
-
Patent number: 5557017Abstract: A method for producing a hydrofluorocarbon of the formula a H.sub.n R.sub.f H wherein n is 0 or 1, and when n is 0, R.sub.f is a C.sub.2-12 linear or branched polyfluoroalkyl group, and when n is 1, R.sub.f is a C.sub.2-12 linear or branched polyfluoroalkylene group, which comprises reacting an iodofluorocarbon of the formula I.sub.n R.sub.f I wherein n and R.sub.f are as defined above, with an alkali metal hydroxide under action of an alcohol mixture comprising a primary alcohol and a secondary alcohol.Type: GrantFiled: October 5, 1994Date of Patent: September 17, 1996Assignee: Asahi Glass Company Ltd.Inventors: Kazuya Oharu, Ryuji Seki, Seisaku Kumai
-
Patent number: 5523476Abstract: A process for producing tetrafluorophthalic anhydride, which comprises chlorinating tetrachlorophthalic anhydride to obtain 3,3,4,5,6,7-hexachloro-1-[3H]-isobenzofuranone, then fluorinating it to obtain 3,4,5,6-tetrafluorophthaloyldifluoride and/or 3,3,4,5,6,7-hexafluoro-1-[3H]-isobenzofuranone, and further reacting the tetrafluorophthalolyldifluoride and/or the hexafluoro-1-[3H]-isobenzofuranone with an inorganic base or an organic acid to obtain tetrafluorophthalic anhydride.Type: GrantFiled: February 21, 1995Date of Patent: June 4, 1996Assignee: Asahi Glass Company Ltd.Inventors: Ryuji Seki, Koji Sugimoto, Seisaku Kumai