Patents by Inventor Keiji Komoto
Keiji Komoto 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: 6376559Abstract: A process for preparing a dispersing component of an inorganic oxide sol which involves dehydrating an aqueous inorganic oxide sol by adding an azeotropic solvent to the aqueous inorganic sol to form an azeotropic mixture, carrying out azeotropic distillation and then surface-treating the dispersing component of the inorganic oxide sol with a silane coupling agent.Type: GrantFiled: July 27, 1999Date of Patent: April 23, 2002Assignee: BASF NOF Coatings Co., Ltd.Inventors: Keiji Komoto, Keishi Yoshikai, Masahiko Hirono, Yoshifumi Ohama
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Publication number: 20020022188Abstract: A toner is comprised of a binder resin, a colorant and a wax. The binder resin has a polycarbonate resin in an amount of from 0.1% by weight to 50.0% by weight and a resin other than the polycarbonate resin in an amount of from 50.0% by weight to 99.9% by weight, based on the weight of the binder resin. In molecular weight distribution as measured by gel permeation chromatography of tetrahydrofuran-soluble matter, the toner contains in an amount of 15.0% by weight or less based on the weight of the toner a component which has in its structure a repeating unit of the polycarbonate resin and is contained in components having a molecular weight of 1,000 or less.Type: ApplicationFiled: September 3, 1998Publication date: February 21, 2002Inventors: AKIRA HASHIMOTO, TSUTOMU KUKIMOTO, MANABU OHNO, TSUYOSHI TAKIGUCHI, YSUKAZU AYAKI, SATOSHI HANDA, MASANORI ITO, KEIJI KOMOTO
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Publication number: 20020009661Abstract: A magnetic toner includes: magnetic toner particles each comprising at least a binder resin and magnetic toner, and inorganic fine powder. The magnetic toner has an average circularity of at least 0.970, and a magnetization of 10-50 Am2/kg at a magnetic field of 79.6 kA/m. The magnetic powder comprises at least magnetic iron oxide. The magnetic toner particles retain carbon in an amount of A and iron in an amount of B at surfaces thereof as measured by X-ray photoelectron spectroscopy, satisfying: B/A<0.001. The binder resin comprises a resin formed by polymerization of a monomer comprising at least styrene monomer. The magnetic toner has a residual styrene monomer content of less than 300 ppm, and contains at least 50% by number of toner particles satisfying a relationship of: D/C≦0.Type: ApplicationFiled: March 8, 2001Publication date: January 24, 2002Inventors: Akira Hashimoto, Kenji Okado, Tsutomu Kukimoto, Tatsuya Nakamura, Tsuyoshi Takiguchi, Tatsuhiko Chiba, Michihisa Magome, Keiji Komoto
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Patent number: 6337169Abstract: A toner suitable for use in electrophotography, etc., is composed of toner particles each containing a binder resin, a colorant and a wax component. Each toner particle has such a microtexture as to provide a cross section as observed through a transmission electron microscope (TEM) exhibiting a matrix of the binder resin, a particle of the wax enclosed with the matrix; and the binder resin dispersed in a particulate form in the wax particle, and the toner particles have a residual monomer content of at most 500 ppm by weight of the toner particles. The colorant may also be dispersed in the wax particle enclosed within the matrix of the binder resin.Type: GrantFiled: June 29, 2000Date of Patent: January 8, 2002Assignee: Canon Kabushiki KaishaInventors: Akira Hashimoto, Satoshi Yoshida, Manabu Ohno, Yasukazu Ayaki, Satoshi Handa, Keiji Komoto
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Publication number: 20010033983Abstract: A toner suitable for use in electrophotography, etc., is composed of toner particles each containing a binder resin, a colorant and a wax component. The toner has a number-average particle size of 2-6 &mgr;m and a standard deviation in particle size of below 2.6 based on a number-basis distribution of circle-equivalent diameters, an average circularity of 0.970-0.995 and a standard deviation in circularity of below 0.030 based on a circularity frequency distribution, and a residual monomer content of at most 500 ppm. The toner particles have such a microtexture as to provide a particle cross section as observed through a transmission electron microscope (TEM) exhibiting a matrix of the binder resin and a particle of the wax dispersed in a discrete form in the matrix of the binder resin.Type: ApplicationFiled: March 30, 1999Publication date: October 25, 2001Inventors: MANABU OHNO, SATOSHI YOSHIDA, SATOSHI HANDA, AKIRA HASHIMOTO, KEIJI KOMOTO
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Publication number: 20010028988Abstract: A magnetic toner comprising magnetic toner particles containing at least a binder resin, a magnetic material containing a magnetic ion oxide, and a release agent. The magnetic toner has a weight-average particle diameter of from 3 &mgr;m to 10 &mgr;m, a magnetization intensity (saturation magnetization) of from 10 Am2/kg to 50 Am2/kg (emu/g) under application of a magnetic field of 79.6 kA/m (1,000 oersteds), an average circularity of 0.970 or more, a ratio of weight-average particle diameter to number-average particle diameter, of 1.40 or less, iron and an iron compound which stand liberated from the magnetic toner particles at a liberation percentage of from 0.05% to 3.00%, and a resin component having a tetrahydrofuran-insoluble matter in an amount of from 3% by weight to 60% by weight. Also disclosed is an image-forming method making use of the magnetic toner.Type: ApplicationFiled: February 21, 2001Publication date: October 11, 2001Inventors: Michihisa Magome, Tsutomu Kukimoto, Tsuyoshi Takiguchi, Tatsuhiko Chiba, Akira Hashimoto, Keiji Komoto
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Patent number: 6177223Abstract: A toner suitable for use in electrophotography, etc., is composed of toner particles each containing a binder resin, a colorant and a wax component. Each toner particle has such a microtexture as to provide a cross section as observed through a transmission electron microscope (TEM) exhibiting a matrix of the binder resin, a particle of the wax enclosed with the matrix; and the binder resin dispersed in a particulate form in the wax particle, and the toner particles have a residual monomer content of at most 500 ppm by weight of the toner particles. The colorant may also be dispersed in the wax particle enclosed within the matrix of the binder resin.Type: GrantFiled: December 28, 1998Date of Patent: January 23, 2001Assignee: Canon Kabushiki KaishaInventors: Akira Hashimoto, Satoshi Yoshida, Manabu Ohno, Yasukazu Ayaki, Satoshi Handa, Keiji Komoto
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Patent number: 6103387Abstract: A thermosetting composition comprises (A) a compound having in the molecule two or more carboxyl groups blocked by a vinyl ether compound, a vinyl thioether compound or a hetero compound having a vinyl type double bond and oxygen or sulfur as the hetero atom, (B) a compound having in the molecule two or more reactive functional groups which can form chemical bonds with the blocked carboxyl groups, and (C) a dispersing component of at least one inorganic oxide sol selected from the group consisting of aluminium oxide sol, silica sol, zirconium oxide sol and antimony oxide sol, and optionally (D) a thermal latent acid catalyst which is activated during curing the composition by heating. A method of coating and a coated article comprise applying the composition. The obtained paint film has excellent weathering resistance, stain resistance, stain-removing property, chemical resistance, moisture resistance and excellent appearance.Type: GrantFiled: June 10, 1997Date of Patent: August 15, 2000Assignee: NOF CorporationInventors: Toshio Yamamoto, Masahiro Sano, Hiroki Mizutani, Keiji Komoto, Masahiro Ishidoya
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Patent number: 6096468Abstract: A toner for use in development of electrostatic latent images is disclosed. The toner has toner particles containing a binder resin, a colorant, a wax and a compound of Formula (A): ##STR1## wherein R.sub.1 and R.sub.4 each represent a substituted or unsubstituted aromatic group, inclusive of a condensed ring; R.sub.2 and R.sub.3 each represent a hydrogen atom, an alkyl group, a substituted or unsubstituted aromatic group, inclusive of a condensed ring; M represents an element selected from B, Ti, Fe, Co, Cr, Al and Ni; and X.sup.n+ represents a cation. The toner has the shape factors SF-1 and SF-2 with the specified range. Further, disclosed are a process for producing the toner and an image forming method using the toner.Type: GrantFiled: May 4, 1999Date of Patent: August 1, 2000Assignee: Canon Kabushiki KaishaInventors: Manabu Ohno, Satoshi Handa, Akira Hashimoto, Keiji Komoto, Yasukazu Ayaki
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Patent number: 6022919Abstract: A coating composition which comprises (A) a resin having a glass transition temperature of 50 to 120.degree. C., a number average molecular weight of 2,000 to 100,000, a hydroxyl value of 50 to 150 mgKOH/g and an acid value of 1 to 25 mgKOH/g, which is produced by copolymerizing 10 to 90 percent by weight of (a) a (meth)acrylic acid ester of a C.sub.1 to C.sub.12 alkyl alcohol, 10 to 50 weight % of (b) a first polymerizable double bond-containing and hydroxyl group-containing monomer, 0.Type: GrantFiled: November 27, 1996Date of Patent: February 8, 2000Assignee: NOF CorporationInventors: Keiji Komoto, Keishi Yoshikai, Masahiko Hirono, Yoshifumi Ohama
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Patent number: 5998080Abstract: A toner for developing an electrostatic image has toner particles containing at least a binder resin, a colorant, and a wax. The wax contains an ester compound represented by specific formula, or a mixture thereof at a content ranging from 50 to 100% by weight based on the weight of the wax.Type: GrantFiled: August 28, 1998Date of Patent: December 7, 1999Assignee: Canon Kabushiki KaishaInventors: Manabu Ohno, Tsutomu Kukimoto, Satoshi Yoshida, Yasukazu Ayaki, Satoshi Handa, Akira Hashimoto, Keiji Komoto, Tsuyoshi Takiguchi
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Patent number: 5660937Abstract: Thermosetting composition comprises a compound having in the molecule two or more carboxyl groups blocked by a vinyl ether compound, a vinyl thioether compound or a hetero compound having a vinyl type double bond and oxygen or sulfur as the hetero atom, a compound having two or more reactive functional groups which can form a chemical bond with the blocked carboxyl compound by heating, a specific vinyl ether or vinyl thioether and a thermal latent acid catalyst. The blocked carboxyl group of the first compound and the reactive functional group of the second compound may be comprised in the same molecule. The thermosetting composition gives cured products having excellent chemical properties, physical properties, weathering resistance and storage stability and is advantageously utilized for coating compositions, ink, adhesive and molded plastics.Type: GrantFiled: March 9, 1995Date of Patent: August 26, 1997Assignee: Nippon Oil And Fats Company, LimitedInventors: Masahiro Ishidoya, Kishio Shibato, Keiji Komoto, Kenji Shibamoto, Mitsuyuki Mashita, Osamu Ohe
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Patent number: 5578677Abstract: A thermosetting composition which comprises:(D) a self-crosslinking compound having in the molecule (a) one or more functional groups of the formula (2): ##STR1## wherein R.sup.5, R.sup.6 and R.sup.7 are each hydrogen or an organic group of 1 to 18 carbons, R.sup.8 is an organic group of 1 to 18 carbons, Y.sup.2 is oxygen or sulfur, or R.sup.7 and R.sup.8 are bonded with each other to form a heterocyclic structure which comprises Y.sup.2 as the heteroatom component; and (b) one or more reactive functional groups which can form a chemical bond with carboxyl functional groups which are regenerated from (a) by heating; (C) optionally, a thermal latent acid catalyst which is activated during curing of the composition by heating; (A) optionally, a compound having in the molecule two or more functional groups of the formula (1): ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 are each hydrogen or an organic group of 1 to 18 carbons, R.sup.4 is an organic group of 1 to 18 carbons, Y.sup.1 is oxygen or sulfur, or R.Type: GrantFiled: December 27, 1995Date of Patent: November 26, 1996Assignee: Nippon Oil and Fats Company, LimitedInventors: Masahiro Ishidoya, Kishio Shibato, Keiji Komoto, Kenji Shibamoto, Mitsuyuki Mashita, Osamu Ohe
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Patent number: 5549932Abstract: Thermosetting composition comprises a compound having in the molecule two or more carboxyl groups blocked by a vinyl ether compound, a vinyl thioether compound or a hetero compound having a vinyl type double bond and oxygen or sulfur as the hetero atom, a compound having two or more reactive functional groups which can form a chemical bond with the blocked carboxyl compound by heating, a specific vinyl ether or vinyl thioether and a thermal latent acid catalyst. The blocked carboxy group of the first compound and the reactive functional group of the second compound may be comprised in the same molecule. The thermosetting composition gives cured products having excellent chemical properties, physical properties, weathering resistant and storage stability and is advantageously utilized for coating compositions, ink, adhesive and molded plastics.Type: GrantFiled: March 9, 1995Date of Patent: August 27, 1996Assignee: Nippon Oil and Fats Company, LimitedInventors: Masahiro Ishidoya, Kishio Shibato, Keiji Komoto, Kenji Shibamoto, Mitsuyuki Mashita, Osamu Ohe
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Patent number: 5521011Abstract: An article coated by a method of coating which comprises coating a substrate with a top coating material comprising at least one pigment and a thermosetting composition, the at least one pigment being in an amount of 0 to 100 weight parts based on 100 weight parts of the thermosetting composition, the thermosetting composition comprising (A) a compound having in the molecule two or more functional groups of the formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are each selected from the group consisting of a hydrogen atom and an organic group of 1 to 18 carbon atoms, R.sup.4 is an organic group of 1 to 18 carbon atoms, Y.sup.1 is oxygen or sulfur, or R.sup.3 and R.sup.4 are bonded with each other to form a heterocyclic structure which comprises Y.sup.Type: GrantFiled: May 18, 1995Date of Patent: May 28, 1996Assignee: Nippon Oil and Fats Company, LimitedInventors: Masahiro Ishidoya, Kishio Shibato, Keiji Komoto, Kenji Shibamoto, Mitsuyuki Mashita, Osamu Ohe
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Patent number: 5516839Abstract: A thermal latent compound which is prepared by a reaction of a polycarboxyl compound having two or more carboxyl groups in the molecule, having an acid equivalent of not more than 1000 g/mole and a number average molecular weight of not more than 4000, with a monovinyl ether compound, wherein at least two carboxyl groups are transformed into a functional group of the formula (1): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are each a hydrogen atom or an organic group of 1 to 18 carbon atoms, R.sup.4 is an organic group of 1 to 18 carbon atoms, Y.sup.1 is an oxygen atom or R.sup.3 and R.sup.4 are bonded together to form a heterocyclic with Y.sup.1 as a heteroatom.Type: GrantFiled: June 15, 1994Date of Patent: May 14, 1996Assignee: Nippon Oil and Fats Company, LimitedInventors: Masahiro Ishidoya, Kishio Shibato, Keiji Komoto, Kenji Shibamoto, Mitsuyuki Mashita, Osamu Ohe
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Patent number: 5419929Abstract: Thermosetting composition comprises a compound having in the molecule two or more carboxyl groups blocked by a vinyl ether compound, a vinyl thioether compound or a hetero compound having a vinyl type double bond and oxygen or sulfur as the hetero atom, a compound having two or more reactive functional groups which can form a chemical bond with the blocked carboxyl compound by heating, a specific vinyl ether or vinyl thioether and a thermal latent acid catalyst. The blocked carboxyl group of the first compound and the reactive functional group of the second compound may be comprised in the same molecule. The thermosetting composition gives cured products having excellent chemical properties, physical properties, weathering resistance and storage stability and is advantageously utilized for coating compositions, ink, adhesive and molded plastics.Type: GrantFiled: September 21, 1992Date of Patent: May 30, 1995Assignee: Nippon Oil and Fats Company, LimitedInventors: Masahiro Ishidoya, Kishio Shibato, Keiji Komoto, Kenji Shibamoto, Mitsuyuki Mashita, Osamu Ohe
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Patent number: 5414065Abstract: A polymer comprising fluoroalkyl group has a structure in which one or two parts of the fluoroalkyl group at the one or both ends of the molecule are linked to a part of alkylene groups or alkylene groups substituted with halogen, a part of alkylene group substituted with functional groups, such as halogen, cyano group, alkylsulfonic acid group, amidoalkylsulfonic acid group, carboxylic acid group, carboxyl group, oxycarbonyl group, ether group, epoxy group and the like, and/or a part of silicone group. A method of preparation of the polymer comprising fluoroalkyl group contains reaction of a fluoroalkanoyl peroxide with a monomer comprising the functional group or a monomer comprising silicone group. A surface active agent comprises fluoroalkyl group and caroxylic acid salt group. A surface treatment agent comprises the polymer comprising fluoroalkyl group, hydrolysis products thereof, hydrolytic condensation products thereof, and mixtures thereof.Type: GrantFiled: June 21, 1994Date of Patent: May 9, 1995Assignee: NOF CorporationInventors: Hideo Sawada, Keiji Komoto, Masahiro Sano, Yutaka Enokida, Mitani Motohiro, Takeo Matsumoto, Masaharu Nakayama, Masato Okajima
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Patent number: 5352740Abstract: Thermosetting composition is excellent in storage stability, useful as one component thermosetting composition, gives cured products having excellent chemical properties, physical properties and weathering resistance and is favorably utilized in coating compositions, ink, adhesive and molded plastics.The thermosetting composition comprises a compound having in the molecule two or more carboxyl groups blocked by a vinyl ether compound, a vinyl thioether compound or a hetero compound having a vinyl type double bond and oxygen or sulfur as the hetero atom, a compound having two or more reactive functional groups which can form a chemical bond with the blocked carboxyl compound by heating and optionally a thermal latent acid catalyst. The blocked carboxyl group of the first compound and the reactive functional group of the second compound may be comprised in the same molecule.Type: GrantFiled: April 4, 1991Date of Patent: October 4, 1994Assignee: Nippon Oil and Fats Company, LimitedInventors: Masahiro Ishidoya, Kishio Shibato, Keiji Komoto, Kenji Shibamoto, Mitsuyuki Mashita, Osamu Ohe
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Patent number: 5324803Abstract: A polymer comprising fluoroalkyl group has a structure in which one or two parts of the fluoroalkyl group at the one or both ends of the molecule are linked to a part of alkylene groups or alkylene groups substituted with halogen, a part of alkylene group substituted with functional groups, such as halogen, cyano group, alkylsulfonic acid group, amidoalkylsulfonic acid group, carboxylic acid group, carboxyl group, oxycarbonyl group, ether group, epoxy group and the like, and/or a part of silicone group. A method of preparation of the polymer comprising fluoroalkyl group contains reaction of a fluoroalkanoyl peroxide with a monomer comprising the functional group or a monomer comprising silicone group. A surface active agent comprises fluoroalkyl group and caroxylic acid salt group. A surface treatment agent comprises the polymer comprising fluoroalkyl group, hydrolysis products thereof, hydrolytic condensation products thereof, and mixtures thereof.Type: GrantFiled: October 13, 1992Date of Patent: June 28, 1994Assignee: NOF CorporationInventors: Hideo Sawada, Keiji Komoto, Masahiro Sano, Yutaka Enokida, Motohiro Mitani, Takeo Matsumoto, Masaharu Nakayama, Masato Okajima