Patents by Inventor Chiaki Maeda
Chiaki Maeda 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: 4729849Abstract: A fluorine-containing surface active composition capable reducing the surface tension of water and the interfacial tension between water and oil, which comprises (A) at least one of cationic, non-ionic to ampho-ionic surfactant showing a surface tension of not more than 25 dyne/cm when determined on a 0.01 to 1.0 % by weight aqueous solution and having at least one fluorine-containing group comprising not less than 6 carbon atoms, of which each carbon atom bears at least one fluorine atom, and (B) at least one of surfactants of the formula: ##STR1## wherein R is a substituted or unsubstituted aliphatic group of 4 to 20 carbon atoms or a substituted or unsubstituted aromatic hydrocarbon group of 6 to 20 carbon atoms, R.sup.1, R.sup.2 and R.sup.Type: GrantFiled: July 14, 1986Date of Patent: March 8, 1988Assignee: Daikin Kogyo Co., Ltd.Inventors: Iwao Hisamoto, Chiaki Maeda, Mitsuhiro Nishiwaki
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Patent number: 4638089Abstract: A fluorine-containing quaternary ammonium compound of the formula: ##STR1## wherein R.sub.f is a fluorine-containing straight or branched aliphatic hydrocarbon or polyether group, R.sub.1, R.sub.2 and R.sub.3 are each a C.sub.1 -C.sub.21 straight or branched alkyl, hydroxyalkyl or alkenyl group or a substituted or unsubstituted aryl or aralkyl group, R.sub.4 is a hydrogen atom or a acyl group, X.sup.- is an anion and n is an integer of 1 to 3, having a capability of reducing the surface tension of water and the interfacial tension between water and oil.Type: GrantFiled: April 24, 1981Date of Patent: January 20, 1987Assignee: Daikin Kogyo Co., Ltd.Inventors: Iwao Hisamoto, Chiaki Maeda, Mitsuhiro Nishiwaki
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Patent number: 4609489Abstract: A fluorine-containing surface active composition capable reducing the surface tension of water to the interfacial tension between water and oil, which comprises (A) at least one of cationic, non-ionic and ampho-ionic surfactant showing a surface tension of not more than 25 dyne/cm when determined on a 0.01 to 1.0 % by weight aqueous solution and having at least one fluorine-containing group comprising not less than 6 carbon atoms, of which each carbon atom bears at least one fluorine atom, and (B) at least one of surfactants of the formula: ##STR1## wherein R is a substituted or unsubstituted aliphatic group of 4 to 20 carbon atoms or a substituted or unsubstituted aromatic hydrocarbon group of 6 to 20 carbon atoms, R.sup.1, R.sup.2 and R.sup.Type: GrantFiled: March 29, 1984Date of Patent: September 2, 1986Assignee: Daikin Kogyo Co., Ltd.Inventors: Iwao Hisamoto, Chiaki Maeda, Mitsuhiro Nishiwaki
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Patent number: 4606832Abstract: A fire extinguishing composition which comprises bromofluorohydrocarbon and/or bromochlorofluorohydrocarbon and a fluorine-containing high molecular compound.Type: GrantFiled: November 4, 1983Date of Patent: August 19, 1986Assignee: Daikin Kogyo Company, LimitedInventors: Iwao Hisamoto, Chiaki Maeda, Takasige Esaka, Masaru Hirai
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Patent number: 4563287Abstract: An aqueous fire-extinguishing composition comprising an aqueous solvent and a water-soluble high molecular compound which contains a fluoroalkyl group and a water-solubilizable group, has an average molecular weight of not less than 5,000 and fluorine content of not less than 10% by weight and is soluble in water in an amount of at least 0.1% by weight at 25.degree. C. and the surface tension of which is not more than 50 dyn/cm when measured on 0.1 to 5.0% by weight aqueous solution at 25.degree. C. has excellent fire-extinguishing performance on fire of cooking oil, particularly of frying oil.Type: GrantFiled: August 16, 1983Date of Patent: January 7, 1986Assignee: Daikin Kogyo Co., Ltd.Inventors: Iwao Hisamoto, Chiaki Maeda, Takasige Esaka, Masaru Hirai
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Patent number: 4559179Abstract: A fluorine-containing vinyl compound of the formula: ##STR1## wherein Rf is fluoroalkyl of 4 to 20 carbon atoms, R.sub.1 is hydrogen or acyl of 1 to 3 carbon atoms, one of R.sub.2 and R.sub.3 is hydrogen and the other is methyl, R.sub.4 is hydrogen or methyl, A is a divalent organic group, and l, m and n are each an integer of 0 to 40 and satisfy 0<l+m+n.ltoreq.40, which can modify surface properties of resins.Type: GrantFiled: April 5, 1984Date of Patent: December 17, 1985Assignee: Daikan Kogyo Co., Ltd.Inventors: Iwao Hisamoto, Chiaki Maeda, Masaru Hirai
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Patent number: 4511733Abstract: A fluorine-containing aminocarboxylic acid compound of the formula: ##STR1## wherein Rf is a C.sub.3 -C.sub.21 fluorine-containing aliphatic group; R.sub.1 is a hydrogen atom or a C.sub.1 -C.sub.3 acyl group; R.sub.2 is a hydrogen atom or a C.sub.1 -C.sub.5 alkyl group; R.sub.3 is a substituted or unsubstituted C.sub.1 -C.sub.3 alkylene group; M is a cation; and n is an integer of 1 to 5 effectively lowers the surface tension of water and/or organic liquids and the interfacial tensions between them.Type: GrantFiled: December 23, 1982Date of Patent: April 16, 1985Assignee: Daikin Kogyo Co., Ltd.Inventors: Iwao Hisamoto, Chiaki Maeda, Masaru Hirai
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Patent number: 4472294Abstract: A fluorine-containing compound of the formula: ##STR1## wherein Rf is a C.sub.3 -C.sub.21 fluorine-containing group; R is a hydrogen atom or a C.sub.1 -C.sub.4 acyl group; Q is an aliphatic or aromatic hydrocarbon group having not more than twenty-one carbon atoms; and n is an integer of 1 to 10 lowers the surface tensions of water and/or organic liquids and the interfacial tensions between them.Type: GrantFiled: January 29, 1982Date of Patent: September 18, 1984Assignee: Daikin Kogyo Co., Ltd.Inventors: Iwao Hisamoto, Chiaki Maeda, Mitsuhiro Nishiwaki
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Patent number: 4459221Abstract: A fluorine-containing surface active composition capable of reducing the surface tension of water and the interfacial tension between water and oil, which comprises (A) at least one cationic, non-ionic or ampho-ionic surfactant showing a surface tension of not more than 25 dyne/cm when determined on a 0.01 to 1.0% by weight aqueous solution and having at least one fluorine-containing group comprising not less than 6 carbon atoms, of which each carbon atom bears at least one fluorine atom, and (B) at least one of surfactants of the formula: ##STR1## wherein R is a substituted or unsubstituted aliphatic group of 4 to 20 carbon atoms or a substituted or unsubstituted aromatic hydrocarbon group of 6 to 20 carbon atoms, R.sup.1, R.sup.2 and R.sup.Type: GrantFiled: June 26, 1981Date of Patent: July 10, 1984Assignee: Daikin Kogyo Co., Ltd.Inventors: Iwao Hisamoto, Chiaki Maeda, Mitsuhiro Nishiwaki
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Patent number: 4428851Abstract: A volatile oil composition for use in metal working comprising a base oil and at least one halogenated hydrocarbon.Type: GrantFiled: December 1, 1981Date of Patent: January 31, 1984Assignee: Daikin Kogyo Co., Ltd.Inventors: Iwao Hisamoto, Chiaki Maeda, Yukio Omure
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Patent number: 4383932Abstract: A water removing composition suitable for use in treating solid surfaces which comprises (a) a halogenated hydrocarbon solvent, (b) at least one member selected from the group consisting of amines having an oxyalkylene group, their salts with an organic acid of the formula, R.sup.1 COOH, HOOCR.sup.2 COOH, R.sup.1 SO.sub.3 H, R.sup.1 OPO.sub.3 H or (R.sup.1 O).sub.2 PO.sub.2 H, wherein R.sup.1 is an alkyl group having 1 to 20 carbon atoms which may be substituted with a hydroxyl group or an alkylphenyl group having 7 to 26 carbon atoms and R.sup.2 is an alkylene group having 1 to 10 carbon atoms, and quaternary ammonium salts composed of an ammonium having an oxyalkylene group and an acid radical of the above-mentioned organic acids, and (c) at least one substituted amine salt with dialkyl sulfosuccinate of the formula ##STR1## wherein R.sup.1 is as defined above, and R.sup.3, R.sup.4 and R.sup.Type: GrantFiled: November 4, 1977Date of Patent: May 17, 1983Assignee: Daikin Kogyo Co., Ltd.Inventors: Iwao Hisamoto, Chiaki Maeda, Yukio Omure, Takashi Onishi
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Patent number: 4378303Abstract: An azeotropic solvent composition comprising about 64.6 to 89.0% by weight of tetrachlorodifluoroethane, about 3.7 to 34.2% by weight of an alcohol having carbon atoms of 1 to 5 and about 1.2 to 7.3% by weight of nitroethane.Type: GrantFiled: April 13, 1981Date of Patent: March 29, 1983Assignee: Daikin Kogyo Co., Ltd.Inventors: Iwao Hisamoto, Chiaki Maeda, Yukio Omure
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Patent number: 4354881Abstract: A steel stock such as hot-rolled pickled steel plate, cold-rolled steel plate, cast iron or the like is subjected to antirust treatment with an aqueous solution or an emulsion consisting mainly of a 1-hydroxybenzotriazole compound represented by the general formula: ##STR1## where X and Y represent hydrogen atoms and hydroxy, alkyl, carboxyl, nitro and sulfonic groups, and further containing one or more of aliphatic dicarboxylic acids added thereto, and having a pH within the range of 7-10.Type: GrantFiled: May 5, 1981Date of Patent: October 19, 1982Assignee: Nippon Steel CorporationInventors: Keiichi Tanikawa, Tatsurou Obi, Susumu Otsuka, Isao Manabe, Akiyoshi Inubushi, Chiaki Maeda
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Patent number: 4303534Abstract: Use of a water-soluble high molecular compound which contains a fluoroalkyl group and a water-solubilizable group, having a molecular weight of not less than 5000 and a fluorine content of not less than 10% by weight and is soluble in water in an amount of at least 0.1% by weight at 25.degree. C. and of which the surface tension is not more than 50 dyn/cm when measured on 0.1 to 5.0% by weight aqueous solution at 25.degree. C., as an additive to a foam fire-extinguishing agent so as to improve and enhance the fire-extinguishing performances of the latter, particularly for the firing of polar organic solvents, is disclosed.Type: GrantFiled: October 15, 1979Date of Patent: December 1, 1981Assignee: Daikin Kogyo Co., Ltd.Inventors: Iwao Hisamoto, Chiaki Maeda, Takasige Esaka, Mitsuhiro Nishiwaki
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Patent number: 4278552Abstract: A fluorine-containing betaine compound of the formula: ##STR1## wherein Rf is a polyfluoroalkyl group having 3 to 21 carbon atoms, A is a group of the formula: ##STR2## (wherein R.sup.4 is a hydrogen atom or an acyl group having 2 or 3 carbon atoms and p is an integer of 1 to 5), R.sup.1 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms or a group of the formula: Rf--A--, R.sup.2 and R.sup.3 are each a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group having 1 to 3 carbon atoms, m is an integer of 2 to 6 and n is an integer of 1 to 4, which is useful as an additive to a foam fire-extinguishing composition for polar organic liquids.Type: GrantFiled: April 12, 1979Date of Patent: July 14, 1981Assignee: Daikin Kogyo Co., Ltd.Inventors: Iwao Hisamoto, Naonori Enjo, Chiaki Maeda, Takasige Esaka, Yukio Omure, Toshihiko Iida, Hideki Aomi
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Patent number: 4165338Abstract: A compound of the formula: ##STR1## WHEREIN Q is a hydrogen atom, --CH.sub.2 CH(OH)CH.sub.2 Rf or a hydrocarbon residue having a valence corresponding to m which may contain one or more of --O--, --COO--, --NH--, --N.dbd. and ##STR2## IN THE CHAIN, R is a hydrogen atom, a hydrocarbon residue or --CH.sub.2 CH(OH)CH.sub.2 Rf and m is an integer of not less than 1, Rf being a perfluoroalkyl group, an .omega.-hydro-perfluoroalkyl group o an .differential.-chloro-erfluoroalkylgroup having 4 to 20 carbon atoms, which is useful as an agent for rendering fibrous materials oleophobic and anti-soiling and may be prepared by reacting a perfluoroalkylpropylene oxide of the formula: ##STR3## wherein Rf is the same as defined above, with a reagent of the formula:Q'(NHR').sub.mwherein Q' is a hydrogen atom or a hydrocarbon residue having a valence corresponding to m which may contain one or more of --O--, --COO--, --NH-- and --N.dbd.Type: GrantFiled: June 16, 1977Date of Patent: August 21, 1979Assignee: Daikin Kogyo Co., Ltd.Inventors: Atsuo Katsushima, Iwao Hisamoto, Shoshin Fukui, Chiaki Maeda, Akitoshi Iwatani, Takahisa Kato, Masayuki Nagai, Hiroyuki Shinkai, Masayuki Asaoka
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Patent number: 4124517Abstract: A dry cleaning composition comprising as effective components a fluorine-containing hydrocarbon solvent and at least one surfactant selected from the group consisting of organic acid salts of monoamines represented by the formula ##STR1## wherein R.sub.1 is alkyl having 6 to 20 carbon atoms, R.sub.2 is hydrogen atom or CH.sub.3, m and n are each zero or an integer of 1 to 20, and are further defined by 3.ltoreq.m + n.ltoreq.20, R.sub.3 is hydrogen atom or alkyl having 6 to 20 carbon atoms when n is zero and R.sub.3 is hydrogen atom when m is 1 to 20, and organic acid salts of diamines represented by the formula ##STR2## wherein R.sub.2 is as defined above, R.sub.4 is alkyl having 6 to 20 carbon atoms, R.sub.5 is alkylene having 2 to 6 carbon atoms, l is zero or an integer of 1 to 20, m and n are as defined above, and 3.ltoreq.l + m + n.ltoreq.20.Type: GrantFiled: September 15, 1976Date of Patent: November 7, 1978Assignee: Daikin Kogyo Kabushiki KaishaInventors: Iwao Hisamoto, Chiaki Maeda, Takayuki Deguchi, Yukio Omure, Takasi Onishi
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Patent number: 4084059Abstract: A 2-hydroxy-1,1,2,3,3-pentahydroperfluoroalkyl derivative of either one of the formulae:[RfCH.sub.2 CH(OH)CH.sub.2 OOC].sub.m QandQ'(NR.sub.1 R.sub.2).sub.m'wherein Rf is a perfluoroalkyl, an .omega.-hydro-perfluoroalkyl or an .omega.-chloro-perfluoroalkyl group having 4 to 20 carbon atoms, Q is a hydrocarbon residue having a valency corresponding to m which may contain one or more of --O--, --COO-- and --OH in and/or on the chain, Q' is a hydrogen atom or a hydrocarbon residue having a valency corresponding to m' which may contain one or more of --O--, --COO--, --NH--, --N.dbd. and ##STR1## IN THE CHAIN, R.sub.1 and R.sub.2 are each a hydrogen atom or a group of the formula: --CH.sub.2 CH(OH)CH.sub.2 Rf, at least one of R.sub.1 and R.sub.2 being --CH.sub.2 CH(OH)CH.sub.2 Rf, m is an integer of not less than 2 and m' is an integer of not less than 1, which is useful as an oil-repellent agent or an anti-soiling agent for fibrous materials.Type: GrantFiled: January 6, 1975Date of Patent: April 11, 1978Assignee: Daikin Kogyo Co., Ltd.Inventors: Atsuo Katsushima, Iwao Hisamoto, Shoshin Fukui, Chiaki Maeda, Akitoshi Iwatani, Takahisa Kato, Masayuki Nagai, Hiroyuki Shinkai, Masayuki Asaoka