Patents by Inventor Kanae Hiraishi
Kanae Hiraishi 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: 9141014Abstract: The present invention is a toner for developing electrostatic charge image containing a wax derived from a plant cholesterol, an electric charge-controlling agent, a coloring agent and a binding resin. The toner is suited for use in the electromagnetic induction-heated fixing system which is capable of heating the heating member up to a predetermined fixing temperature in a short period of time, makes it possible to maintain images free of irregular luster or fouling for extended periods of time and is, further, suited for being fixed at a low temperature.Type: GrantFiled: March 27, 2012Date of Patent: September 22, 2015Assignee: HODOGAYA CHEMICAL CO., LTD.Inventors: Masaki Okubo, Tatsuji Orita, Hideyuki Otsuka, Kenichi Sato, Kanae Hiraishi
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Patent number: 9056884Abstract: A process for producing a charge control agent comprising an azo-based iron complex salt compound as an effective component, comprises: synthesizing a monoazo compound through diazotization coupling; and ironing the monoazo compound by using an ironizing agent such as ferric chloride to produce an azo-based iron complex salt compound represented by the following formula. The ironization reaction of the monoazo compound is carried out while pH is kept at 7.0 to 8.0. Since the above azo-based iron complex salt compound having high purity can be obtained at a high yield, it can be used as a charge control agent directly and a special purification step can be eliminated, thereby making it possible to greatly cut the production cost.Type: GrantFiled: March 5, 2013Date of Patent: June 16, 2015Assignee: HODOGAYA CHEMICAL CO., LTD.Inventors: Atsushi Takesue, Yoshihiko Abe, Hideyuki Otsuka, Jun Watanabe, Shunsuke Saitoh, Kanae Hiraishi
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Patent number: 8900785Abstract: A charge control agent comprises a barbituric acid derivative represented by the following general formula (1): wherein R1 to R8 are alkyl groups, cycloalkyl groups or aryl groups, V, W, X, Y and Z are carbon atoms or nitrogen atoms, at least two of which being carbon atoms, and p, q, r, s and t are the numbers of 0 or 1.Type: GrantFiled: September 2, 2011Date of Patent: December 2, 2014Assignee: Hodogaya Chemical Co., Ltd.Inventors: Ikuo Kimura, Masami Ito, Masaya Tojou, Kanae Hiraishi, Masafumi Asakai
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Patent number: 8790855Abstract: The present invention provides a charge control agent containing, as an active substance(s), one or two or more thiazolidinedione derivatives represented by the following formula (1), where R1 represents a hydrogen atom, etc.; R2 represents a hydrogen atom, a linear or branched alkyl group having 1 to 8 carbon atoms which may have a substituent, etc.; R3 to R7, which may be identical to or different from each other, represent a hydrogen atom, a chlorine atom, a linear or branched alkyl group having 1 to 8 carbon atoms which may have a substituent, etc., and may be joined to each other to form a ring; and V, W, X, Y and Z represent a carbon atom or a nitrogen atom, and 0 to 3 of any of V, W, X, Y and Z are nitrogen atoms which do not have the substituents of R3 to R7.Type: GrantFiled: September 1, 2011Date of Patent: July 29, 2014Assignee: Hodogaya Chemical Co., LtdInventors: Ikuo Kimura, Motonori Tsuji, Masami Ito, Masaya Tojo, Kanae Hiraishi
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Publication number: 20140171628Abstract: A process for producing a charge control agent comprising an azo-based iron complex salt compound as an effective component, comprises: synthesizing a monoazo compound through diazotization coupling; and ironing the monoazo compound by using an ironizing agent such as ferric chloride to produce an azo-based iron complex salt compound represented by the following formula. The ironization reaction of the monoazo compound is carried out while pH is kept at 7.0 to 8.0. Since the above azo-based iron complex salt compound having high purity can be obtained at a high yield, it can be used as a charge control agent directly and a special purification step can be eliminated, thereby making it possible to greatly cut the production cost.Type: ApplicationFiled: March 5, 2013Publication date: June 19, 2014Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Atsushi TAKESUE, Yoshihiko ABE, Hideyuki OTSUKA, Jun WATANABE, Shunsuke SAITOH, Kanae HIRAISHI
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Publication number: 20140004459Abstract: The present invention is a toner for developing electrostatic charge image containing a wax derived from a plant cholesterol, an electric charge-controlling agent, a coloring agent and a binding resin. The toner is suited for use in the electromagnetic induction-heated fixing system which is capable of heating the heating member up to a predetermined fixing temperature in a short period of time, makes it possible to maintain images free of irregular luster or fouling for extended periods of time and is, further, suited for being fixed at a low temperature.Type: ApplicationFiled: March 27, 2012Publication date: January 2, 2014Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Masaki Okubo, Tasuji Orita, Hideyuki Otsuka, Kenichi Sato, Kanae Hiraishi
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Publication number: 20130177844Abstract: The present invention provides a positive-charge control agent containing, as an active substance(s), one or two or more rhodanine compounds represented by the following formula (1). wherein R1 represents a hydrogen atom, etc.; R2 represents a hydrogen atom, etc.; and R3 to R7, which may be identical to or different from each other, represent a hydrogen atom, a cyano group, a trifluoromethyl group, a nitro group, etc. R2 to R7 may be joined to each other to form a ring. V, W, X, Y and Z represent a carbon atom or a nitrogen atom and 0 to 3 of V, W, X, Y and Z are nitrogen atoms, with the proviso that at least one of R3 to R7 is a linear or branched alkyl group having 1 to 4 carbon atoms substituted with three or more fluorine atoms etc.Type: ApplicationFiled: November 22, 2011Publication date: July 11, 2013Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Masateru Yasumura, Masami Ito, Ikuo Kimura, Masaya Tojo, Kanae Hiraishi, Masaki Okubo
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Publication number: 20130177843Abstract: The present invention provides a charge control agent containing, as an active substance(s), one or two or more thiazolidinedione derivatives represented by the following formula (1), where R1 represents a hydrogen atom, etc.; R2 represents a hydrogen atom, a linear or branched alkyl group having 1 to 8 carbon atoms which may have a substituent, etc.; R3 to R7, which may be identical to or different from each other, represent a hydrogen atom, a chlorine atom, a linear or branched alkyl group having 1 to 8 carbon atoms which may have a substituent, etc., and may be joined to each other to form a ring; and V, W, X, Y and Z represent a carbon atom or a nitrogen atom, and 0 to 3 of any of V, W, X, Y and Z are nitrogen atoms which do not have the substituents of R3 to R7.Type: ApplicationFiled: September 1, 2011Publication date: July 11, 2013Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Ikuo Kimura, Motonori Tsuji, Masami Ito, Masaya Tojo, Kanae Hiraishi
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Publication number: 20130157190Abstract: [Problems] To provide a charge control agent which contains no heavy metal component, therefore, does not adversely affect the environment and, besides, is colorless or is light-colored lending itself well to be applied to colored toners, and is little affected by the environmental conditions, and exhibits the effect of imparting high charging power even when it is used for polymerized toners. [Means for Solution] The charge control agent comprises a barbituric acid derivative represented by the following general formula (1): wherein R1 to R8 are alkyl groups, cycloalkyl groups or aryl groups, V, W, X, Y and Z are carbon atoms or nitrogen atoms, at least two of which being carbon atoms, and p, q, r, s and t are the numbers of 0 or 1.Type: ApplicationFiled: September 2, 2011Publication date: June 20, 2013Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Ikuo Kimura, Masami Ito, Masaya Tojou, Kanae Hiraishi, Masafumi Asakai
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Publication number: 20120315576Abstract: The present invention provides a charge control agent containing, as an active substance(s), one or two or more rhodanine compounds represented by the following formula (1). where R1 represents a hydrogen atom, etc.; R2 represents a hydrogen atom, a linear or branched alkyl group having 1 to 8 carbon atoms which may have a substituent, a substituted or unsubstituted heterocyclic group, etc.; R3 to R7, which may be identical to or different from each other, represent a hydrogen atom, a linear or branched alkyl group having 1 to 10 carbon atoms which may have a substituent, a linear or branched alkyloxy group having 1 to 20 carbon atoms which may have a substituent, etc., and may be joined to each other to form a ring; and V, W, X, Y and Z represent a carbon atom or a nitrogen atom, and 0 to 3 of any of V, W, X, Y and Z are nitrogen atoms which do not have the substituents of R3 to R7.Type: ApplicationFiled: February 21, 2011Publication date: December 13, 2012Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Masateru Yasumura, Masami Ito, Masaya Tojo, Kanae Hiraishi, Masaki Okubo, Hideyuki Otsuka
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Publication number: 20120141931Abstract: A negatively charged polymerized toner having high charging performance, which comprises a charge control agent particularly useful for color toners and polymerized toners, the charge control agent comprising a cyclic phenol sulfide as an active ingredient, which speeds up charging risetime, has a high charge amount and charging characteristics particularly excellent in environmental stability, and is safe since it does not have any problem with the waste regulations.Type: ApplicationFiled: August 5, 2010Publication date: June 7, 2012Inventors: Masateru Yasumura, Masami Ito, Motonori Tsuji, Masataka Sawano, Kanae Hiraishi, Masaya Tojou