Patents by Inventor Katsutoshi Aoki
Katsutoshi Aoki 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: 6383705Abstract: A toner for electrophotography comprising a resin binder comprising as its main components (a) a crystalline polyester having a softening point of from 85° to 150° C., obtainable by polycondensing an alcohol component which comprises 80% by mol or more of an aliphatic diol having 2 to 6 carbon atoms and a carboxylic acid component which comprises 80% by mol or more of fumaric acid; and (b) an amorphous polyester and/or an amorphous polyester-polyamide, obtainable by polycondensing monomers comprising 50% by weight or more of an aromatic compound, wherein a weight ratio of the crystalline polyester to the amorphous polyester and/or the amorphous polyester-polyamide, i.e. crystalline polyester/(amorphous polyester and/or amorphous polyester-polyamide), is from 1/99 to 50/50.Type: GrantFiled: February 9, 2001Date of Patent: May 7, 2002Assignee: Kao CorporationInventors: Katsutoshi Aoki, Yoshihiro Fukushima, Yutaka Kanamaru, Koji Akiyama
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Patent number: 6339115Abstract: A molding composition comprising (A) a fibrous material, (B) a nonlinear unsaturated polyester and/or (C) a nonlinear unsaturated polyester-polyamide, and (D) a radical generator, and a molded article obtained therefrom.Type: GrantFiled: August 4, 2000Date of Patent: January 15, 2002Assignee: Kao CorporationInventors: Katsutoshi Aoki, Takashi Yamaguchi, Kuniyasu Kawabe
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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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Publication number: 20010018157Abstract: A toner for electrophotography comprising a resin binder comprising as its main components (a) a crystalline polyester having a softening point of from 85° to 150° C., obtainable by polycondensing an alcohol component which comprises 80% by mol or more of an aliphatic diol having 2 to 6 carbon atoms and a carboxylic acid component which comprises 80% by mol or more of fumaric acid; and (b) an amorphous polyester and/or an amorphous polyester-polyamide, obtainable by polycondensing monomers comprising 50% by weight or more of an aromatic compound, wherein a weight ratio of the crystalline polyester to the amorphous polyester and/or the amorphous polyester-polyamide, i.e. crystalline polyester/(amorphous polyester and/or amorphous polyester-polyamide), is from 1/99 to 50/50.Type: ApplicationFiled: February 9, 2001Publication date: August 30, 2001Inventors: Katsutoshi Aoki, Yoshihiro Fukushima, Yutaka Kanamaru, Koji Akiyama
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Publication number: 20010016614Abstract: A molding composition comprising an aggregate [Component (A)], a linear unsaturated polyester [Component (B)] and/or linear unsaturated polyester polyamide [Component (C)], and a radical generator [Component [D]), characterized in that each of Component (B) and Component (C) comprises a specific alkylene oxide adduct of bisphenol A in an amount of from 3 to 50 mol % based on the total amount of constituent monomers of each of Component (B) and Component (C) and a molded article obtained by molding the composition.Type: ApplicationFiled: February 2, 2001Publication date: August 23, 2001Inventors: Takashi Yamaguchi, Katsutoshi Aoki, Kuniyasu Kawabe
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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: 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: 5945246Abstract: The toner for electrophotography contains a binder resin, wherein the binder resin has a condensation polymerization-type resin for forming a matrix and an addition polymerization-type resin for forming a dispersed domain. The dispersed domain with a cross-sectional diameter of not more than 2 .mu.m has an areal proportion of not less than 90%, based on the total cross-sectional area of the dispersed domain. This toner is stable, which is capable of maintaining a suitable tribo electric charge, thereby providing a high image quality in which the formed images do not undergo deterioration even under severe environmental conditions. Moreover, in a fixing method using a heat roller; fixing at a low temperature can be performed without using an offset inhibiting liquid.Type: GrantFiled: June 15, 1998Date of Patent: August 31, 1999Assignee: KAO CorporationInventors: Hiroyuki Kawaji, Eizi Morimoto, Ken-ichi Suenaga, Tetsuhiro Semura, Katsutoshi Aoki, Kuniyasu Kawabe
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Patent number: 5886100Abstract: The thermosetting coating composition in a powdery form, includes (a) a binder resin prepared by the steps comprising preparing a starting material monomer mixture of two different polymerization reactions, each of the polymerization reaction being carried out in an independent reaction path, and then concurrently carrying out both of the two different polymerization reactions in one reaction vessel; (b) a colorant; and (c) a crosslinking agent. The coating film is prepared by curing the above thermosetting coating composition.Type: GrantFiled: March 4, 1997Date of Patent: March 23, 1999Assignee: KAO CorporationInventors: Katsutoshi Aoki, Yukiya Sato, Masayuki Maruta, Yasunori Inagaki, Kuniyasu Kawabe
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Patent number: 5866059Abstract: In order to produce a new substance having a diamond crystal structure, the following steps are taken in order. First, a graphite-like substance is prepared which contains boron (B), carbon (C) and nitrogen (N) as main elements. Then, the graphite-like substance is mixed with a metal powder to produce a mixture. Then, a pressure is applied to the mixture to produce a molded body, and then an explosion pressure is applied to the molded body.Type: GrantFiled: July 17, 1996Date of Patent: February 2, 1999Assignees: Central Glass Company, Limited, Agency of Industrial Science and Technology, Asahi Kasei Kogyo Kabushiki KaishaInventors: Shuzo Fujiwara, Masatake Yoshida, Yozo Kakudate, Shu Usuba, Hiroyuki Yokoi, Katsutoshi Aoki, Masayuki Kawaguchi, Tadayuki Kawashima, Katsuharu Kasami, Tamikuni Komatsu
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Patent number: 5723246Abstract: The binder resin for producing a toner includes the following three resins (A) to (C): resin (A) having a softening point of 120.degree. C. or more and 170.degree. C. or less, a glass transition temperature of 58.degree. C. or more and less than 75.degree. C., and a weight percentage of components insoluble to chloroform at 25.degree. C. of 5% by weight or more and 50% by weight or less; resin (B) having a softening point of 90.degree. C. or more and 120.degree. C. or less, a glass transition temperature of 58.degree. C. or more and less than 75.degree. C., and a weight percentage of components insoluble to chloroform at 25.degree. C. of less than 5% by weight; and resin (C) having a softening point of 80.degree. C. or more and less than 110.degree. C., a glass transition temperature of 45.degree. C. or more and less than 58.degree. C., and a weight percentage of components insoluble to chloroform at 25.degree. C. of less than 5% by weight.Type: GrantFiled: May 23, 1996Date of Patent: March 3, 1998Assignee: Kao CorporationInventors: Katsutoshi Aoki, Yoshihiro Ueno, Tetsuhiro Semura, Shinji Moriyama, Kuniyasu Kawabe
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Patent number: 5677100Abstract: The encapsulated toner for heat-and-pressure fixing includes a heat-fusible core material containing at least a thermoplastic resin and a coloring agent and a shell formed thereon so as to cover the surface of the heat-fusible core material, a main component of the shell being a hybrid resin having a molecular structure including a molecular chain obtainable by condensation polymerization and a molecular chain obtainable by addition polymerization, the two types of the molecular chains being chemically bonded.Type: GrantFiled: December 8, 1995Date of Patent: October 14, 1997Assignee: Kao CorporationInventors: Tetsuya Asano, Tetsuhiro Semura, Katsutoshi Aoki
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Patent number: 5483016Abstract: The method of producing a binder resin has the steps of blending in advance (a) a starting material monomer mixture for two polymerization reaction types, (b) a compound which can react with both of starting material monomers for the two polymerization reaction types, and (c) a tricarboxylic or higher polycarboxylic acid or a derivative thereof, the two polymerization reaction types having independent reaction paths to each other in one reaction vessel; and concurrently carrying out the two polymerization reactions in one reaction vessel to give the binder resin. According to the present invention, the binder resin which has an excellent environmental stability in the tribo electric charge and the image quality, and also has good pulverizability and transparency can be produced. Moreover, in a fixing method using a heat roller, fixing at a low temperature can be performed without using an offset inhibiting liquid.Type: GrantFiled: April 26, 1994Date of Patent: January 9, 1996Assignee: Kao CorporationInventors: Katsutoshi Aoki, Eizi Morimoto, Hiroyuki Kawaji, Ken-ichi Suenaga, Tetsuhiro Semura, Kuniyasu Kawabe