Patents by Inventor Masayuki Maruta
Masayuki Maruta 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: 6984601Abstract: A catalyst for preparing condensation polymerization resin for a toner comprising at least one compound selected from the group consisting of a titanium compound represented by the formula (I): Ti(X)n(Y)m (I), wherein X is a substituted amino group having a total number of carbon atoms of from 1 to 28; Y is an alkoxy group, alkenyloxy group or acyloxy group, each having a total number of carbon atoms of from 1 to 28; and each of n and m is an integer of from 1 to 3, wherein a sum of n and m is 4; and a titanium compound represented by the formula (II): Ti(Z)4 (II), wherein Z is an alkoxy group, alkenyloxy group or acyloxy group, each having a total number of carbon atoms of from 8 to 28, wherein the four kinds of Z may be identical or different from each other; and a condensation polymerization resin composition comprising a condensation polymerization resin and the above catalyst.Type: GrantFiled: December 30, 2002Date of Patent: January 10, 2006Assignee: Kao CorporationInventors: Eiji Shirai, Takashi Kubo, Katsutoshi Aoki, Masayuki Maruta
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Patent number: 6946202Abstract: A combination of powder coatings usable in a powder coating method for forming a coating film having visually homogeneous hue by mixing two or more powder coatings of which each color is different. In the combination of powder coatings, each of differences in triboelectric charges of two or more powder coatings is 5.0 ?C/g or less. The coating method usable herein includes the step of applying onto a substrate to be coated two or more powder coatings of which each color is different, in which the triboelectric charges are controlled in the above given ranges.Type: GrantFiled: March 12, 1997Date of Patent: September 20, 2005Assignee: Nippon Paint Co., Ltd.Inventors: Masayuki Maruta, Yukiya Sato, Katsutoshi Aoki, Yasunori Inagaki, Kuniyasu Kawabe, Hisakazu Tajima, Shinji Moriyama
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Patent number: 6936393Abstract: A catalyst for preparing a polyester for a toner, comprising an inorganic tin(II) compound; a polyester resin composition comprising a polyester and the catalyst; and a toner comprising the polyester resin composition. The catalyst for preparing a polyester is suitably used for a toner which is used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method, and the like.Type: GrantFiled: December 4, 2002Date of Patent: August 30, 2005Assignee: Kao CorporationInventors: Takashi Kubo, Katsutoshi Aoki, Eiji Shirai, Masayuki Maruta
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Patent number: 6890695Abstract: A toner for electrophotography comprising a resin binder comprising a crystalline polyester and an amorphous resin, wherein said crystalline polyester is dispersed in the resin binder in an amount of from 1 to 40% by weight, and wherein 90% or more of a dispersed domain of said crystalline polyester has a diameter of from 0.1 to 2 ?m. The toner for electrophotography can be suitably used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing, and the like.Type: GrantFiled: March 26, 2002Date of Patent: May 10, 2005Assignee: Kao CorporationInventors: Eiji Shirai, Katsutoshi Aoki, Masayuki Maruta
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Patent number: 6864030Abstract: A toner comprising a resin binder comprising a crystalline resin; a colorant; and fine inorganic particles, the fine inorganic particles being externally added thereto, wherein a coating ratio of the fine inorganic particles on a surface of the toner is 130 to 300%. The toner can be suitably used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method and the like.Type: GrantFiled: September 27, 2002Date of Patent: March 8, 2005Assignee: Kao CorporationInventors: Eiji Shirai, Masayuki Maruta, Katsutoshi Aoki
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Patent number: 6723822Abstract: A crystalline polyester obtained by polycondensing monomers comprising 0.1 to 10% by mol of a divalent aromatic compound, wherein the crystalline polyester has a softening point of 85° to 150° C. The crystalline polyester can be suitably used for a resin binder for toner for electrophotography and the like used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing, and the like; a polyester resin composition comprising the crystalline polyester.Type: GrantFiled: March 26, 2002Date of Patent: April 20, 2004Assignee: Kao CorporationInventors: Eiji Shirai, Katsutoshi Aoki, Masayuki Maruta
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Publication number: 20030158372Abstract: A catalyst for preparing condensation polymerization resin for a toner comprising at least one compound selected from the group consisting of a titanium compound represented by the formula (I): Ti(X)n(Y)m (I), wherein X is a substituted amino group having a total number of carbon atoms of from 1 to 28; Y is an alkoxy group, alkenyloxy group or acyloxy group, each having a total number of carbon atoms of from 1 to 28; and each of n and m is an integer of from 1 to 3, wherein a sum of n and m is 4; and a titanium compound represented by the formula (II): Ti(Z)4 (II), wherein Z is an alkoxy group, alkenyloxy group or acyloxy group, each having a total number of carbon atoms of from 8 to 28, wherein the four kinds of Z may be identical or different from each other; and a condensation polymerization resin composition comprising a condensation polymerization resin and the above catalyst.Type: ApplicationFiled: December 30, 2002Publication date: August 21, 2003Applicant: Kao CorporationInventors: Eiji Shirai, Takashi Kubo, Katsutoshi Aoki, Masayuki Maruta
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Publication number: 20030118929Abstract: A toner comprising a resin binder comprising a crystalline resin; a colorant; and fine inorganic particles, the fine inorganic particles being externally added thereto, wherein a coating ratio of the fine inorganic particles on a surface of the toner is 130 to 300%. The toner can be suitably used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method and the like.Type: ApplicationFiled: September 27, 2002Publication date: June 26, 2003Inventors: Eiji Shirai, Masayuki Maruta, Katsutoshi Aoki
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Publication number: 20030109668Abstract: A catalyst for preparing a polyester for a toner, comprising an inorganic tin(II) compound; a polyester resin composition comprising a polyester and the catalyst; and a toner comprising the polyester resin composition. The catalyst for preparing a polyester is suitably used for a toner which is used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method, and the like.Type: ApplicationFiled: December 4, 2002Publication date: June 12, 2003Applicant: Kao CorporationInventors: Takashi Kubo, Katsutoshi Aoki, Eiji Shirai, Masayuki Maruta
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Publication number: 20030105244Abstract: The combination of powder coatings usable in a coating method comprising mixing two or more powder coatings of which each color is different, wherein each of the powder coatings fuses with each other and is heat-cured, to thereby give a coating film having a homogenous hue. A powder coating composition comprising two or more powder coatings of which each color is different, wherein each of the powder coatings fuses with each other and is heat-cured, to thereby give a coating film having a homogenous hue. A coating method comprising the steps of (a) applying to a substrate two or more powder coatings, of which each color is different; (b) heating to fuse with each other each of the two or more powder coatings applied in step (a); and (c) curing the resulting fused product in step (b), to give a coating film having a homogeneous hue.Type: ApplicationFiled: September 23, 2002Publication date: June 5, 2003Applicant: Nippon Paint Co., Ltd.Inventors: Yukiya Sato, Hisakazu Tajima, Katsutoshi Aoki, Takehiko Tohjo, Yasunori Inagaki, Masayuki Maruta, Shingo Tanaka
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Patent number: 6538074Abstract: The combination of powder coatings usable in a coating method comprising mixing two or more powder coatings of which each color is different, wherein each of the powder coatings fuses with each other and is heat-cured, to thereby give a coating film having a homogenous hue. A powder coating composition comprising two or more powder coatings of which each color is different, wherein each of the powder coatings fuses with each other and is heat-cured, to thereby give a coating film having a homogenous hue. A coating method comprising the steps of (a) applying to a substrate two or more powder coatings, of which each color is different; (b) heating to fuse with each other each of the two or more powder coatings applied in step (a); and (c) curing the resulting fused product in step (b), to give a coating film having a homogeneous hue.Type: GrantFiled: May 30, 2000Date of Patent: March 25, 2003Assignee: Nippon Paint Co., Ltd.Inventors: Yukiya Sato, Hisakazu Tajima, Katsutoshi Aoki, Takehiko Tohjo, Yasunori Inagaki, Masayuki Maruta, Shingo Tanaka
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Publication number: 20030039910Abstract: A toner for electrophotography comprising a resin binder comprising a crystalline polyester and an amorphous resin, wherein said crystalline polyester is dispersed in the resin binder in an amount of from 1 to 40% by weight, and wherein 90% or more of a dispersed domain of said crystalline polyester has a diameter of from 0.1 to 2 &mgr;m. The toner for electrophotography can be suitably used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing, and the like.Type: ApplicationFiled: March 26, 2002Publication date: February 27, 2003Inventors: Eiji Shirai, Katsutoshi Aoki, Masayuki Maruta
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Publication number: 20030040585Abstract: A crystalline polyester obtained by polycondensing monomers comprising 0.1 to 10% by mol of a divalent aromatic compound, wherein the crystalline polyester has a softening point of 85° to 150° C. The crystalline polyester can be suitably used for a resin binder for toner for electrophotography and the like used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing, and the like; a polyester resin composition comprising the crystalline polyester.Type: ApplicationFiled: March 26, 2002Publication date: February 27, 2003Inventors: Eiji Shirai, Katsutoshi Aoki, Masayuki Maruta
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Patent number: 6288166Abstract: The positively chargeable toner includes a binder resin and a coloring agent, the binder resin including (a) a resin (1) capable of forming a matrix in the toner, the resin (1) being a hybrid resin of a polyester resin and a vinyl resin; and (b) a resin (2) capable of forming a domain dispersed in the matrix formed by the resin (1), the resin (2) being a vinyl resin having a positive charge functional group. This positively chargeable toner has a good evenness of chargeability and a high charging-up speed with a small proportion of a reversely charged toner upon triboelectric charging. Moreover, in a heat roller fixing method, fixing at a low temperature can be performed without using an offset inhibiting liquid.Type: GrantFiled: August 17, 1994Date of Patent: September 11, 2001Assignee: Kao CorporationInventors: Shin-ichi Sata, Yasuhiro Hidaka, Katsutoshi Aoki, Hiroyuki Kawaji, Masayuki Maruta
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Patent number: 6207768Abstract: The combination of powder coatings usable in a coating method comprising mixing two or more powder coatings of which each color is different, wherein each of the powder coatings fuses with each other and is heat-cured, to thereby give a coating film having a homogeneous hue. A powder coating composition comprising two or more powder coatings of which each color is different, wherein each of the powder coatings fuses with each other and is heat-cured, to thereby give a coating film having a homogeneous hue. A coating method comprising the steps of (a) applying to a substrate two or more powder coatings, of which each color is different; (b) heating to fuse with each other each of the two or more powder coatings applied in step (a); and (c) curing the resulting fused product in step (b), to give a coating film having a homogeneous hue.Type: GrantFiled: November 25, 1997Date of Patent: March 27, 2001Assignee: Kao CorporationInventors: Yukiya Sato, Hisakazu Tajima, Katsutoshi Aoki, Takehiko Tohjo, Yasunori Inagaki, Masayuki Maruta, Shingo Tanaka
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Patent number: 6202945Abstract: While plural kind of powder paints of different hues are mixed with each other without melting for preparation of a powder paint of a desire hue, a fluidity improver possessing a charge control function is simultaneously mixed into the powder paints without melting. The mixed powder paint containing the fluidity improver is charged, and then electrostatic powder coating is performed by the charged powder paint.Type: GrantFiled: August 14, 1998Date of Patent: March 20, 2001Assignee: Kao CorporationInventors: Shinichiro Yasuda, Masayuki Maruta, Yukiya Sato
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Patent number: 6121408Abstract: The powder coating for use in a coating method which includes the steps of mixing and applying two or more powder coatings to a substrate, the powder coating comprising a resin not having thermosetting properties at a temperature of 160.degree. C. or less by itself, and being heat-cured at a temperature of 160.degree. C. or less when used in combination with other powder coatings. The powder coating composition comprising two or more powder coatings, wherein each of the powder coatings comprises a resin not having thermosetting properties at a temperature of 160.degree. C. or less by itself, and being heat-cured at a temperature of 160.degree. C. or less to form a coating film when used in combination with other powder coatings.Type: GrantFiled: April 7, 1998Date of Patent: September 19, 2000Assignee: Kao CorporationInventors: Katsutoshi Aoki, Masayuki Maruta, Yukiya Sato, Hisakazu Tajima, Takehiko Tohjo, Yasunori Inagaki, Shingo Tanaka
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Patent number: 6117607Abstract: A full color toner for nonmagnetic one-component development usable in a developer device including a developer roller and a blade, the blade serving to regulate a toner layer formed on the developer roller into a uniform thickness and to supply electric charges to toners by triboelectric charging, the full color toner for nonmagnetic one-component development including (a) fine resinous particles including at least a colorant and a binder resin having a polyester resin as a main component; and (b) additives externally applied onto a surface of the fine resinous particles, the additives including inorganic fine particles consisting of positively chargeable, inorganic fine particles and negatively chargeable, inorganic fine particles when subjecting the additives to triboelectric charging with an iron powder.Type: GrantFiled: October 8, 1997Date of Patent: September 12, 2000Assignee: Kao CorporationInventors: Jun Shimizu, Hidenori Tachi, Masayuki Maruta
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Patent number: 5955152Abstract: An electrostatic latent image formed on a light-sensitive body is developed by making a thermosetting powder coating material adhere under electrostatic force to the light-sensitive body. The powder coating material on the light-sensitive body is transferred from the transfer part of an intermediate transfer body which is softer than the light-sensitive body and the object to be coated, onto an object to be coated. The powder coating material is thermally set in such a way that it is able to bake onto the object to be coated.Type: GrantFiled: August 8, 1997Date of Patent: September 21, 1999Assignee: Kao CorporationInventors: Shinichiro Yasuda, Masayuki Maruta
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Patent number: 5894989Abstract: A plurality of linear elements or meshed elements are arranged in a powder paint transportation path in an electrostatic powder coating gun. The materials of the linear elements and meshed elements are capable of charging the powder paint by static electricity generated by friction between the powder paint and the elements.Type: GrantFiled: April 22, 1997Date of Patent: April 20, 1999Assignee: Kao CorporationInventors: Shinichiro Yasuda, Masayuki Maruta, Yukiya Sato