Patents by Inventor Seisaku Kumai

Seisaku Kumai 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: 7015263
    Abstract: A process for recovering fluoropolymers, which comprises contacting an ion exchange membrane comprising a fluoropolymer having carboxylic acid groups (hereinafter referred to as a C-polymer) and a fluoropolymer having sulfonic acid groups (hereinafter referred to as a S-polymer) and having inorganic particles deposited on the surface, with a solvent to let it swell and to remove the inorganic particles from the surface, then, contacting it with a solvent which is a good solvent for the S-polymer and a poor solvent for the C-polymer to obtain a solid composed mainly of the C-polymer and a solution having the S-polymer dissolved therein, and recovering them by solid-liquid separation.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: March 21, 2006
    Assignee: Asahi Glass Company, Limited
    Inventors: Seisaku Kumai, Yutaka Fukatsu, Ryota Tokura
  • Patent number: 6515102
    Abstract: A process for recovering fluoropolymers, which comprises contacting an ion exchange membrane comprising a fluoropolymer having carboxylic acid groups (hereinafter referred to as a C-polymer) and a fluoropolymer having sulfonic acid groups (hereinafter referred to as a S-polymer) and having inorganic particles deposited on the surface, with a solvent which is a good solvent for the C-polymer and a good solvent for the S-polymer, to separate a solution having the C-polymer and the S-polymer dissolved therein, and the inorganic particles, then esterifying the C-polymer in the solution to form precipitate of an ester of the C-polymer, and fractionating and recovering the precipitate and a solution having the S-polymer dissolved therein by solid-liquid separation.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: February 4, 2003
    Assignees: Asahi Glass Company, Limited, Seimi Chemical Co., Ltd.
    Inventors: Seisaku Kumai, Yutaka Fukatsu, Harumi Mihara, Ryota Tokura
  • Publication number: 20020128335
    Abstract: A process for recovering fluoropolymers, which comprises contacting an ion exchange membrane comprising a fluoropolymer having carboxylic acid groups (hereinafter referred to as a C-polymer) and a fluoropolymer having sulfonic acid groups (hereinafter referred to as a S-polymer) and having inorganic particles deposited on the surface, with a solvent to let it swell and to remove the inorganic particles from the surface, then, contacting it with a solvent which is a good solvent for the S-polymer and a poor solvent for the C-polymer to obtain a solid composed mainly of the C-polymer and a solution having the S-polymer dissolved therein, and recovering them by solid-liquid separation.
    Type: Application
    Filed: March 6, 2002
    Publication date: September 12, 2002
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Seisaku Kumai, Yutaka Fukatsu, Ryota Tokura
  • Publication number: 20020128430
    Abstract: A process for recovering fluoropolymers, which comprises contacting an ion exchange membrane comprising a fluoropolymer having carboxylic acid groups (hereinafter referred to as a C-polymer) and a fluoropolymer having sulfonic acid groups (hereinafter referred to as a S-polymer) and having inorganic particles deposited on the surface, with a solvent which is a good solvent for the C-polymer and a good solvent for the S-polymer, to separate a solution having the C-polymer and the S-polymer dissolved therein, and the inorganic particles, then esterifying the C-polymer in the solution to form precipitate of an ester of the C-polymer, and fractionating and recovering the precipitate and a solution having the S-polymer dissolved therein by solid-liquid separation.
    Type: Application
    Filed: March 8, 2002
    Publication date: September 12, 2002
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Seisaku Kumai, Yutaka Fukatsu, Harumi Mihara, Ryota Tokura
  • Patent number: 6283360
    Abstract: The present invention relates to a composition for preventing creeping of a flux for soldering, which is free from a problem from the viewpoint of the global environment or working environment. The present invention provides a composition for preventing creeping of a flux for soldering, consisting of a composition comprising a polymer containing polymer units of an unsaturated ester containing a polyfluoroalkyl group, a fluorine-type surfactant and an aqueous medium. Further, the present invention provides a method for soldering by means of the composition. Furthermore, the present invention provides an electronic part or printed board soldered by the method. Still further, the present invention provides an electric appliance employing such an electronic part or printed board.
    Type: Grant
    Filed: February 3, 2000
    Date of Patent: September 4, 2001
    Assignee: Seimi Chemical Co., Ltd.
    Inventors: Seisaku Kumai, Yutaka Fukatsu, Shunji Odaka
  • Patent number: 6197989
    Abstract: A fluorine-containing organic silicon compound represented by the following formula 1, which is useful as various industrial base materials required to have performances such as water and oil repellency, anti-fouling properties or release properties and as raw materials therefor.
    Type: Grant
    Filed: March 17, 1999
    Date of Patent: March 6, 2001
    Assignees: Asahi Glass Company Ltd., OSi Specialties, Inc.
    Inventors: Yutaka Furukawa, Mami Kotera, Seisaku Kumai, Robert E. Ruckle, Jr., Gerald J. Murphy
  • Patent number: 5929292
    Abstract: A production method which comprises reacting one or more feedstock compounds to form a desired compound having a boiling point higher than the feedstock compounds, wherein the reaction is carried out under reflux in a distillation column portion of a reactor provided with the distillation column.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: July 27, 1999
    Assignee: Asahi Glass Company Ltd.
    Inventors: Toru Shimoyama, Kazuya Oharu, Toru Ueno, Seisaku Kumai
  • Patent number: 5914422
    Abstract: A method for producing a fluorine-containing silicone compound, which comprises subjecting a compound of the following formula (I) and a hydrosilicone compound having at least one hydrogen atom bonded to a silicon atom to hydrosilylation to obtain a fluorine-containing silicone compound having a R.sup.f --Q--CR.sup.1 R.sup.2 CR.sup.3 HCR.sup.4 R.sup.5 -- group bonded to the silicon atom:R.sup.f --Q--CR.sup.1 R.sup.2 CR.sup.3 .dbd.CR.sup.4 R.sup.5(I)wherein R.sup.f is a monovalent fluorine-containing organic group, Q is a single bond or a bivalent organic group containing no fluorine atom, and each of R.sup.1 to R.sup.5 which are independent of one another, is a hydrogen atom or a monovalent organic group.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: June 22, 1999
    Assignee: Asahi Glass Company Ltd.
    Inventors: Yutaka Furukawa, Mami Kotera, Seisaku Kumai, Kazuya Oharu, Toshihiko Toma
  • Patent number: 5908950
    Abstract: Polyether modified fluoroalkylsiloxanes having the general structure of Formula (I), Formula (II) or Formula (III): ##STR1## wherein x is about 0 to 500, y is about 1 to 50, z is about 1 to 50, R=C.sub.p H.sub.2p --(OC.sub.2 H.sub.4).sub.n --(OC.sub.3 H.sub.6).sub.n).sub.m --OR' in which p is about 2 to 5, n is about 0 to 50, N is about 0 to 50, and one of n or m must be >0, and R'=H, an alkyl group with 1-4 carbons, or an acetyl group and R.sub.f =C.sub.a H.sub.2a --O.sub.b --C.sub.c H.sub.2c --C.sub.d F.sub.2d+1 in which a is 3 or 4, b is 0 or 1, c is 0 or 2-4 and d is 4-12 with the provisos that if b=0, then c=0, and that if b=1, then c=2-4; z.sub.1 is about 0 to 50 and y.sub.1 is about 0 to 50, are useful to reduce the coefficient of friction and to increase mar resistance of coatings, to increase spreadability and wettability of coating formulations, and as foam control agents.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: June 1, 1999
    Assignee: Witco Corporation
    Inventors: Jeffrey A. Cooke, Gerald J. Murphy, Yutaka Furukawa, Seisaku Kumai
  • Patent number: 5861524
    Abstract: Oligomeric fluoroalkylsiloxanes corresponding to the formula: ##STR1## wherein x is 0 to 3, y is 0, 1, or 2; z is 0 or 1; x+y>0, and R has the formula --C.sub.a H.sub.2a --O.sub.b --C.sub.d H.sub.2c --C.sub.d F.sub.2d+1 in which a is 2-4, b is 0 or 1, c is 0-8 and d is 4-12, and compositions thereof with an oil, are useful as spreading agents and in agricultural applications.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: January 19, 1999
    Assignee: OSi Specialties, Inc.
    Inventors: Gerald J. Murphy, Seisaku Kumai, Jeffrey A. Cooke, Yutaka Furukawa, George A. Policello
  • Patent number: 5834614
    Abstract: A method for producing a fluorine-containing silicone compound, which comprises subjecting a fluorine-containing unsaturated compound of the following formula (1) and a hydrosilicone compound having at least one hydrogen atom bonded to a silicon atom to hydrosilylation in the presence of a catalyst to obtain a fluorine-containing silicone compound having a R.sup.f --Q--CR.sup.1 R.sup.2 --CHR.sup.3 --CR.sup.4 R.sup.5 -- group bonded to the silicon atom:R.sup.f --Q--CR.sup.1 R.sup.2 --CR.sup.3 .dbd.CR.sup.4 R.sup.5( 1)wherein R.sup.f is a monovalent fluorine-containing organic group, Q is a single bond or a bivalent organic group, and each of R.sup.1 to R.sup.5 which are independent of one another, is a hydrogen atom or a monovalent organic group, wherein the hydrosilylation is carried out substantially in the absence of a solvent.
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: November 10, 1998
    Assignees: Asahi Glass Company Ltd., OSi Specialties Incorporated
    Inventors: Yutaka Furukawa, Mami Kotera, Seisaku Kumai, Gerald J. Murphy
  • Patent number: 5834612
    Abstract: A fluorine-containing organic compound of the following formula (1):R.sup.f CH.sub.2 CH.sub.2 CH.sub.2 OCH.sub.2 CH.dbd.CH.sub.2 ( 1)wherein R.sup.f is a C.sub.1-20 fluoroalkyl group.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: November 10, 1998
    Assignees: Asahi Glass Company Ltd., OSI Specialties, Inc.
    Inventors: Yutaka Furukawa, Seisaku Kumai, Jeffery A. Cooke, Gerald J. Murphy, George A. Policello
  • Patent number: 5763709
    Abstract: 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: Grant
    Filed: December 23, 1996
    Date of Patent: June 9, 1998
    Assignee: Asahi Glass Company Ltd.
    Inventors: Kazuya Oharu, Ryuji Seki, Seisaku Kumai
  • Patent number: 5728903
    Abstract: A method for producing a fluorine-containing silicone compound, which comprises subjecting a compound of the following formula (I) and a hydrosilicone compound having at least one hydrogen atom bonded to a silicon atom to hydrosilylation to obtain a fluorine-containing silicone compound having a R.sup.f --Q--CR.sup.1 R.sup.2 CR.sup.3 HCR.sup.4 R.sup.5 -- group bonded to the silicon atom:R.sup.f --Q--CR.sup.1 R.sup.2 CR.sup.3 .dbd.CR.sup.4 R.sup.5(I)wherein R.sup.f is a monovalent fluorine-containing organic group, Q is a single bond or a bivalent organic group containing no fluorine atom, and each of R.sup.1 to R.sup.5 which are independent of one another, is a hydrogen atom or a monovalent organic group.
    Type: Grant
    Filed: January 6, 1997
    Date of Patent: March 17, 1998
    Assignee: Asahi Glass Company Ltd.
    Inventors: Yutaka Furukawa, Mami Kotera, Seisaku Kumai, Kazuya Oharu, Toshihiko Toma
  • Patent number: 5710317
    Abstract: A method for preparing difluoroacetic acid fluoride, which comprises reacting a 1-alkoxy-1,1,2,2-tetrafluoroethane of the formula HCF.sub.2 CF.sub.2 OR.sup.1 wherein R.sup.1 is a C.sub.1-4 alkyl group in a gas phase in the presence of a metal oxide catalyst.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: January 20, 1998
    Assignee: Asahi Glass Company Ltd.
    Inventors: Kazuya Oharu, Seisaku Kumai
  • Patent number: 5663399
    Abstract: A method for producing a fluorine-containing silicone compound, which comprises subjecting a compound of the following formula (I) and a hydrosilicone compound having at least one hydrogen atom bonded to a silicon atom to hydrosilylation to obtain a fluorine-containing silicone compound having a R.sup.f --Q--CR.sup.1 R.sup.2 CR.sup.3 HCR.sup.4 R.sup.5 -- group bonded to the silicon atom:R.sup.f --Q--CR.sup.1 R.sup.2 CR.sup.3 =CR.sup.4 R.sup.5 (I)wherein R.sup.f is a monovalent fluorine-containing organic group, Q is a single bond or a bivalent organic group containing no fluorine atom, and each of R.sup.1 to R.sup.5 which are independent of one another, is a hydrogen atom or a monovalent organic group.
    Type: Grant
    Filed: October 25, 1995
    Date of Patent: September 2, 1997
    Assignee: Asahi Glass Company Ltd.
    Inventors: Yutaka Furukawa, Mami Kotera, Seisaku Kumai, Kazuya Oharu, Toshihiko Toma
  • Patent number: 5648504
    Abstract: 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: Grant
    Filed: February 13, 1996
    Date of Patent: July 15, 1997
    Assignee: Asahi Glass Company Ltd.
    Inventors: Ryuji Seki, Koji Sugimoto, Seisaku Kumai
  • Patent number: 5648568
    Abstract: 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: Grant
    Filed: June 5, 1995
    Date of Patent: July 15, 1997
    Assignee: Asahi Glass Company Ltd.
    Inventors: Kazuya Oharu, Ryuji Seki, Seisaku Kumai
  • Patent number: 5646222
    Abstract: A polyfluorohydrocarbon group-containing acrylate of the formula (1):R.sub.f --(CH.sub.2).sub.n --Q--(CH.sub.2).sub.h --.phi.--[X--.phi.--].sub.y --(CH.sub.2).sub.m OC(O)CR.dbd.CH.sub.2(1)wherein R.sub.f is a polyfluorohydrocarbon group having from 2 to 22 carbon atoms to which fluorine atoms are bonded, wherein some of such carbon atoms may be substituted by ether-type oxygen atoms,.phi. is a p-phenylene group which may be substituted by one or more halogen atoms selected from fluorine and chlorine, provided that when a plurality of .phi. are present in one molecule, such a plurality of .phi. may be the same or different from one another,R is a hydrogen atom, a methyl group, a fluorine atom, a chlorine atom or a bromine atom,Q is an oxygen atom or a sulfur atom,X is a single bond, --CH.dbd.CH--, --N.dbd.CH--, --CH.dbd.N-- or --C(O)--,n is an integer of from 1 to 22,h is an integer of from 0 to 22,m is an integer of from 1 to 11, andy is an integer of from 0 to 5.
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: July 8, 1997
    Assignee: Asahi Glass Company Ltd.
    Inventors: Takashige Maekawa, Ryoko Osawa, Satoshi Kamata, Seisaku Kumai
  • Patent number: 5621147
    Abstract: A 1,1,2-trifluoro-2-(trans-4-substituted cyclohexyl)ethylene of the formula (1):R--(A).sub.m --Cy--CF=CF.sub.2 (1)wherein R is a C.sub.1-10 alkyl group, a halogen atom or a cyano group, provided that in the case of the alkyl group, an oxygen atom may be interposed in a carbon-carbon bond of the alkyl group or in a carbon-carbon bond between this alkyl group and A, some of carbon-carbon bonds in the alkyl group may be triple bonds or double bonds, one --CH.sub.2 -- group in the alkyl group may be substituted by a carbonyl group, and some or all of hydrogen atoms in the alkyl group may be substituted by fluorine atoms;Cy is an unsubstituted trans-1,4-cyclohexylene group;A is a trans-1,4-cyclohexylene group, a 1,4-phenylene group or a 1,4-cyclohexenylene group, wherein each of such cyclic groups is unsubstituted or substituted by one or more halogen atoms or cyano groups, one or more =CH-- groups constituting rings of such cyclic groups may be substituted by nitrogen atoms, and one or more --CH.sub.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: April 15, 1997
    Assignee: Asahi Glass Company Ltd.
    Inventors: Osamu Yokokoji, Tamaki Simizu, Seisaku Kumai