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: 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: 5568239Abstract: A stainproofing oil for a heat fixing roller, which consists essentially of a fluorosilicone compound having a silicon atom to which a monovalent fluorine-containing group selected from the formulae (1) to (3) is bonded:R.sub.f.sup.1 --X.sup.1 -- (1)R.sub.f.sup.2 --X.sup.2 --O--X.sup.3 -- (2)R.sub.f.sup.3 --X.sup.4 --O--X.sup.5 -- (3)wherein R.sub.f.sup.1 is a monovalent polyfluorohydrocarbon group, R.sub.f.sup.2 is a monovalent polyfluoroalkyl group containing an ether oxygen atom, R.sub.f.sup.3 is a monovalent polyfluorohydrocarbon group, and each of X.sup.1 to X.sup.5 independently is a bivalent hydrocarbon group.Type: GrantFiled: March 27, 1995Date of Patent: October 22, 1996Assignee: Asahi Glass Company Ltd.Inventors: Yutaka Furukawa, Seisaku Kumai, Mami Yoshino
-
Patent number: 5565607Abstract: 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: GrantFiled: February 24, 1995Date of Patent: October 15, 1996Assignee: Asahi Glass Company Ltd.Inventors: Takashige Maekawa, Ryoko Osawa, Satoshi Kamata, 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
-
Patent number: 5349098Abstract: A process for producing chlorofluorobenzenes, which comprises reacting fluorine-containing nitrobenzenes of the following formula (1) with chlorine gas to obtain chlorofluorobenzenes of the following formula (2): ##STR1## wherein n and m are integers satisfying 1.ltoreq.n.ltoreq.3, 0.ltoreq.m.ltoreq.2 and 1.ltoreq.n+m.ltoreq.3.Type: GrantFiled: December 15, 1992Date of Patent: September 20, 1994Assignee: Asahi Glass Company Ltd.Inventors: Seisaku Kumai, Akihiro Wada, Shinsuke Morikawa
-
Patent number: 5332851Abstract: A process for producing a 5-fluorobenzoic acid of the formula (V), which comprises trichloromethylating a fluorobenzene of the formula (I) to obtain a 5-fluorobenzotrichloride of the formula (II), then reacting it with aqueous ammonia to obtain a 5-fluorobenzonitrile of the formula (III), reacting it with a fluorinating agent to obtain a 5-fluorobenzonitrile of the formula (IV) and hydrolyzing it: ##STR1## wherein each of X.sub.1, X.sub.3, Y.sub.1 and Y.sub.3 is a halogen atom, and each of X.sub.2 and Y.sub.2 is hydrogen or a halogen atom.Type: GrantFiled: May 4, 1993Date of Patent: July 26, 1994Assignees: Asahi Glass Company Ltd., Seimi Chemical Co., Ltd.Inventors: Seisaku Kumai, Masao Ohashi, Yutaka Yaginuma, Katsuhiko Takeda
-
Patent number: 5241111Abstract: A process for producing a 5-fluorobenzoic acid of the formula (V), which comprises trichloromethylating a fluorobenzene of the formula (I) to obtain a 5-fluorobenzotrichloride of the formula (II), then reacting it with aqueous ammonia to obtain a 5-fluorobenzonitrile of the formula (III), reacting it with a fluorinating agent to obtain a 5-fluorobenzonitrile of the formula (IV) and hydrolyzing it: ##STR1## wherein each of X.sub.1, X.sub.3, Y.sub.1 and Y.sub.3 is a halogen atom, and each of X.sub.2 and Y.sub.2 is hydrogen or a halogen atom.Type: GrantFiled: November 15, 1990Date of Patent: August 31, 1993Assignees: Asahi Glass Company Ltd., Seimi Chemical Co., Ltd.Inventors: Seisaku Kumai, Masao Ohashi, Yutaka Yaginuma, Katsuhiko Takeda
-
Patent number: 5208394Abstract: A process for producing chlorofluorobenzenes, which comprises reacting fluorine-containing nitrobenzenes of the following formula (1) with chlorine gas to obtain chlorofluorobenzenes of the following formula (2): ##STR1## wherein n and m are integers satisfying 1.ltoreq.n.ltoreq.3, 0.ltoreq.m.ltoreq.2 and 1.ltoreq.n+m.ltoreq.3.Type: GrantFiled: August 6, 1992Date of Patent: May 4, 1993Assignee: Asahi Glass Company Ltd.Inventors: Seisaku Kumai, Akihiro Wada, Shinsuke Morikawa
-
Patent number: 5093515Abstract: A 2-chloro-4,5-difluorobenzoyl compound of the formula: ##STR1## wherein R.sup.2 is a lower alkyl group, and R.sup.7 is a 2,4-difluorophenyl group or a 4-fluorophenyl group.Type: GrantFiled: April 10, 1990Date of Patent: March 3, 1992Assignees: Asahi Glass Company Ltd., Katayama Seiyakusho Co., Ltd.Inventors: Seisaku Kumai, Osamu Yokokoji, Akihiro Tamaoki, Ryonosuke Yoshida, Yoshiyuki Murakami
-
Patent number: 5072062Abstract: A method for brominating a perfluoroalkyl iodide or a perfluoroalkylene diiodide, which comprises reacting a perfluoroalkyl iodide or a perfluoroalkylene diiodide with a brominating agent in a gas phase to obtain a perfluoroalkyl bromide or a perfluoroalkylene dibromide.Type: GrantFiled: April 3, 1991Date of Patent: December 10, 1991Assignee: Asahi Glass Company, Ltd.Inventors: Seisaku Kumai, Akihiro Wada
-
Patent number: 5068449Abstract: Fluorinated benzoyl compounds of the formula: ##STR1## wherein Q is a lower alkyl group, a halogen atom, --CH.sub.2 CO.sub.2 R.sup.1 wherein R.sup.1 is a lower alkyl group, or ##STR2## wherein each of R.sup.2 and R.sup.3 is a lower alkyl group.Type: GrantFiled: February 7, 1990Date of Patent: November 26, 1991Assignee: Asahi Glass Company, Ltd.Inventors: Seisaku Kumai, Osamu Yokokoji, Akihiro Tamaoki
-
Patent number: 5041647Abstract: A process for producing trifluoroacetic acid and trifluoroacetyl chloride from 1,1-dichloro-2,2,2-trifluoroethane, oxygen and water as starting materials, characterized in that the starting materials are reacted in a vapor phase in a reactor of perfect mixing type to avoid local heating, under a condition not to liquefy the starting materials and reaction products, while continuously supplying the starting materials and continuously withdrawing the reaction products, so as to obtain a reaction mixture comprising trifluoroacetyl chloride as the main product and trifluoroacetic acid as an accompanying product.Type: GrantFiled: November 12, 1986Date of Patent: August 20, 1991Assignee: Asahi Glass Co., Ltd.Inventors: Isao Gotoh, Hajime Yoneda, Seisaku Kumai, Tohru Ueno
-
Patent number: 4994610Abstract: Fluorinated benzoyl compounds of the formula: ##STR1## wherein Q is a lower alkyl group, a halogen atom, --CH.sub.2 CO.sub.2 R.sup.1 wherein R.sup.1 is a lower alkyl group, or ##STR2## wherein each of R.sup.2 and R.sup.3 is a lower alkyl group, are disclosed.Type: GrantFiled: December 5, 1989Date of Patent: February 19, 1991Assignee: Asahi Glass Company, Ltd.Inventors: Seisaku Kumai, Osamu Yokokoji, Akihiro Tamaoki
-
Patent number: 4985588Abstract: A process for producing nucleus-fluorinated aromatic carboxylates, which comprise nucleus-fluorinating aromatic carboxylates of the following formula (1) with a fluorinating agent to obtain nucleus-fluorinated aromatic carboxylates of the following formula (2): ##STR1## wherein R.sup.1 is an alkyl group, an aryl group or a fluoroalkyl group, each of A and B is at least one member selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, an aryl group and a fluoroalkyl group, and n and m are integers satisfying m+n=6, provided that m is 1 or 2, provided that at least one A is an activated chlorine or bromine atom, and B corresponding to such an activated chlorine or bromine atom is a fluorine atom.Type: GrantFiled: August 28, 1989Date of Patent: January 15, 1991Assignee: Asahi Glass Company Ltd.Inventors: Seisaku Kumai, Osamu Yokokouji
-
Patent number: 4440948Abstract: Methacrylic acid is prepared by reacting methacrolein with molecular oxygen in the vapor phase at a temperature of from 230.degree. C. to 450.degree. C. in the presence of a catalyst having the formula Mo.sub.12 P.sub..alpha.' X.sub..beta.' Y.sub..gamma.' O.sub..delta.' wherein X is at least one member of the group consisting of Cs and Tl:Y is at least one member of the group consisting of Cs and Tl; Y is at least one member of the group consisting of V, Zr, Nb, Ni, Ta and Fe; .alpha.'=0.1-3; .beta.'=0.2-9; .gamma.'=0.1-7; .delta.'=36-100.Type: GrantFiled: September 22, 1976Date of Patent: April 3, 1984Assignee: Asahi Glass Company, Ltd.Inventors: Yoshio Oda, Keiichi Uchida, Takeshi Morimoto, Seisaku Kumai
-
Patent number: 4379768Abstract: Perfluorosuccinyl fluoride is produced by coupling accompanied by dehalogenation of a difluorohaloacetyl fluoride having the formulaXCF.sub.2 COFwherein X represents I, Br or Cl by reacting with a trapping agent of a halogen at a temperature ranging from 100.degree. to 500.degree. C.Type: GrantFiled: August 26, 1981Date of Patent: April 12, 1983Assignee: Asahi Glass Company, Ltd.Inventors: Masaaki Yamabe, Seiji Munekata, Seisaku Kumai, Isamu Kaneko
-
Patent number: 4340750Abstract: A fluorovinyl ether having the formulaXRfCF.sub.2 OCF.dbd.CF.sub.2 (I)wherein X represents --H, --Cl, --Br, --F, --CO.sub.2 R, --CONRR', --SO.sub.2 F, ##STR1## or --COF and R represents a C.sub.1 -C.sub.10 alkyl group; R' represents --H or a C.sub.1 -C.sub.10 alkyl group; Rf represents a C.sub.1 -C.sub.20 bifunctional perfluoro-containing group is produced by reacting an iodine-containing ether having the formulaXRfCF.sub.2 OCF.sub.2 CF.sub.2 I (II)in the presence of a catalytic component selected from the group consisting of Mg, Cu, Zn, Zn-Cu, Zn-Cd, Zn-Pd, Zn-Hg, Sn, Sb, organomagnesium compounds and organolithium compounds.Type: GrantFiled: October 29, 1980Date of Patent: July 20, 1982Assignee: Asahi Glass Company, Ltd.Inventors: Masaaki Yamabe, Seisaku Kumai, Seiji Munekata
-
Patent number: 4318867Abstract: A process for producing difluoroiodoacetyl fluoride comprises a step of producing an intermediate having a group of ICF.sub.2 CF.sub.2 OSO.sub.2 -- by reacting 1,2-diiodotetrafluoroethane with an oxidizing acid having S(VI) atom and a step of decomposing said intermediate into said product.Type: GrantFiled: May 19, 1980Date of Patent: March 9, 1982Assignee: Asahi Glass Company, Ltd.Inventors: Masaaki Yamabe, Seiji Munekata, Seisaku Kumai
-
Patent number: 4275226Abstract: A fluorovinyl ether having the formulaXRfCF.sub.2 OCF.dbd.CF.sub.2 (I)wherein X represents --H, --Cl, --Br, --F, --CO.sub.2 R, --CONRR', --SO.sub.2 F, ##STR1## or --COF and R represents a C.sub.1 -C.sub.10 alkyl group; R' represents --H or a C.sub.1 -C.sub.10 alkyl group; Rf represents a C.sub.1 -C.sub.20 bifunctional perfluoro-containing group is produced by reacting an iodine-containing ether having the formulaXRfCF.sub.2 OCF.sub.2 CF.sub.2 I (II)in the presence of a catalytic component selected from the group consisting of Mg, Cu, Zn, Zn-Cu, Zn-Cd, Zn-Pd, Zn-Hg, Sn, Sb, organomagnesium compounds and organolithium compounds.Type: GrantFiled: August 9, 1979Date of Patent: June 23, 1981Assignee: Asahi Glass Company, Ltd.Inventors: Masaaki Yamabe, Seisaku Kumai, Seiji Munekata