Patents by Inventor Aya Shirai
Aya Shirai 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).
-
Patent number: 11975086Abstract: A method for removing keratotic plugs capable of sufficiently exhibiting an excellent keratotic plug-removing effect without a burden, such as pam and of irritation, on the skin. The method comprises applying a composition comprising (X) one or more selected from (X1) 2-amino-2-hydroxymethyl-1,3-propanediol, (X2) 2-amino-2-methyl-1-propanol, and (X3) 2-amino-2-methyl-1,3-propanediol and a nonionic surfactant to the skin.Type: GrantFiled: June 29, 2022Date of Patent: May 7, 2024Assignee: KAO CORPORATIONInventors: Toshiaki Ozawa, Takaya Sakai, Mariko Miyoshi, Daisuke Furukawa, Aya Shirai
-
Publication number: 20220347072Abstract: Provided is a method for removing keratotic plugs capable of sufficiently exhibiting an excellent keratotic plug-removing effect without a burden, such as pain and of irritation, on the skin. The present invention relates to a method for removing keratotic plugs comprising using a composition comprising (X) one or more selected from the group consisting of (X1) 2-amino-2-hydroxymethyl-1,3-propanediol (X2), 2-amino-2-methyl-1-propanol, and (X3) 2-amino-2-methyl-1,3-propanediol.Type: ApplicationFiled: June 29, 2022Publication date: November 3, 2022Applicant: KAO CORPORATIONInventors: Toshiaki OZAWA, Takaya SAKAI, Mariko MIYOSHI, Daisuke FURUKAWA, Aya SHIRAI
-
Patent number: 11406576Abstract: Provided is a method for removing keratotic plugs capable of sufficiently exhibiting an excellent keratotic plug-removing effect without a burden, such as pain and of irritation, on the skin. The present invention relates to a method for removing keratotic plugs comprising using a composition comprising (X) one or more selected from the group consisting of (X1) 2-amino-2-hydroxymethyl-1,3-propanediol (X2), 2-amino-2-methyl-1-propanol, and (X3) 2-amino-2-methyl-1,3-propanediol.Type: GrantFiled: April 9, 2018Date of Patent: August 9, 2022Assignee: KAO CORPORATIONInventors: Toshiaki Ozawa, Takaya Sakai, Mariko Miyoshi, Daisuke Furukawa, Aya Shirai
-
Publication number: 20210100727Abstract: Provided is a method for removing keratotic plugs capable of sufficiently exhibiting an excellent keratotic plug-removing effect without a burden, such as pain and of irritation, on the skin. The present invention relates to a method for removing keratotic plugs comprising using a composition comprising (X) one or more selected from the group consisting of (X1) 2-amino-2-hydroxymethyl-1,3-propanediol (X2), 2-amino-2-methyl-1-propanol, and (X3) 2-amino-2-methyl-1,3-propanediol.Type: ApplicationFiled: April 9, 2018Publication date: April 8, 2021Applicant: KAO CORPORATIONInventors: Toshiaki OZAWA, Takaya SAKAI, Mariko MIYOSHI, Daisuke FURUKAWA, Aya SHIRAI
-
Publication number: 20200379365Abstract: An object of the present invention is to provide a new electrostatic latent image developing toner capable of suppressing adhesiveness of a release agent to a member such as a roller or the like and capable of suppressing gloss unevenness and gloss memory. An electrostatic latent image developing toner containing a binder resin, a release agent, and a colorant, wherein the binder resin contains a crystalline resin, the release agent contains a hydrocarbon wax having a branching degree of 3 to 52%, and a top temperature of an exothermic peak during cooling of the electrostatic latent image developing toner measured by a differential scanning calorimetry is within a range of 60 to 85° C.Type: ApplicationFiled: May 27, 2020Publication date: December 3, 2020Inventors: Aya SHIRAI, Noboru UEDA, Takaki KAWAMURA, Yusuke TAKIGAURA, Natsuki ITO, Ami MOTOHASHI
-
Publication number: 20200379364Abstract: Provided is an electrostatic latent image developing toner capable of preventing a release agent from adhering to a member such as a paper conveying roller or the like. An electrostatic latent image developing toner contains at least a binder resin, a colorant, and a release agent, wherein the release agent contains at least an ester wax and the ester wax is an ester wax having a total carbon number of 45 or more and 71 or less, and a top temperature of an exothermic peak during cooling of the electrostatic latent image developing toner measured by a differential scanning calorimetry is within a range of 60° C. or higher and 85° C. or lower.Type: ApplicationFiled: May 27, 2020Publication date: December 3, 2020Inventors: Noboru UEDA, Aya SHIRAI, Takaki KAWAMURA, Natsuki ITO, Yusuke TAKIGAURA, Ami MOTOHASHI
-
Publication number: 20200054539Abstract: Provided is a method for removing keratotic plugs capable of sufficiently exhibiting an excellent keratotic plug-removing effect without a burden, such as pain and feeling of irritation, on the skin. The present invention relates to a method for removing keratotic plugs comprising using a composition comprising 0.8 mass % or more and 20 mass % or less of (A) arginine and having a pH of 8.0 or more and 12.5 or less at 25° C.Type: ApplicationFiled: April 9, 2018Publication date: February 20, 2020Applicant: KAO CORPORATIONInventors: Toshiaki OZAWA, Takaya SAKAI, Mariko MIYOSHI, Daisuke FURUKAWA, Aya SHIRAI
-
Patent number: 10078283Abstract: Provided is a toner for developing electrostatic images containing a toner particle. The toner particle contains a binder resin and a release agent. The binder resin contains a vinyl resin component and a crystalline polyester resin component. The vinyl resin component has a structural unit derived from an alkyl (meth)acrylate monomer represented by Formula (1): H2C?CR1—COOR2 ??Formula (1): In Formula (1), R1 represents a hydrogen atom or a methyl group, and R2 represents an alkyl group having 8 to 22 carbon atoms. The crystalline polyester resin component satisfies Formula (2): 5?|Cacid?Calcohol|?12 ??Formula (2): In Formula (2), Calcohol represents the number of carbon atoms of the main chain of a structural unit derived from a polyhydric alcohol and Cacid represents the number of carbon atoms of the main chain of a structural unit derived from a polyvalent carboxylic acid.Type: GrantFiled: July 14, 2016Date of Patent: September 18, 2018Assignee: KONICA MINOLTA, INC.Inventors: Aya Shirai, Shiro Hirano, Junya Onishi
-
Patent number: 9996017Abstract: An object of the present invention is to provide an electrostatic latent image developing toner containing: a binder resin; and a releasing agent, wherein the binder resin contains a crystalline polyester resin; an endothermic peak top temperature of the electrostatic latent image developing toner is 70° C. or more measured with differential scanning calorimetry (DSC) in a heating-up period of the toner; and a heat value ?Hc(L) is 15% or less with respect to a heat value ?Hc, wherein the heat value ?Hc(L) is a heat value in the range of (an exothermic peak top temperature rc?7° C.) or less; and the heat value ?Hc is a heat value of the total exothermic peak measured with DSC in a heating-down period of the toner.Type: GrantFiled: June 15, 2017Date of Patent: June 12, 2018Assignee: KONICA MINOLTA, INC.Inventors: Aya Shirai, Kouji Sugama, Shiro Hirano, Noboru Ueda
-
Patent number: 9983491Abstract: A process for producing a toner of the present invention includes: a first step of heating a dispersion containing an aqueous medium and a binder resin containing a crystalline resin to a temperature higher than or equal to a melting point of the crystalline resin; and a second step of maintaining the dispersion at temperature T (° C.) for 30 minutes or longer in a state where a pH of the dispersion is maintained at 5.5 or higher and 9.0 or lower, in which the temperature T satisfies the following expression, Rc?25?T?Rc?5, where the Rc represents a recrystallization temperature (° C.) of the crystalline resin.Type: GrantFiled: February 22, 2017Date of Patent: May 29, 2018Assignee: KONICA MINOLTA, INC.Inventors: Junya Onishi, Shiro Hirano, Noboru Ueda, Kouji Sugama, Aya Shirai
-
Patent number: 9933716Abstract: The present invention relates to a toner for electrostatic charge image development, including toner base particles containing a binder resin containing as a main component a vinyl resin having a constitutional unit derived from a monomer having an acid group, and aluminum, wherein a concentration of the aluminum in the toner base particles, as measured by radio inductively coupled plasma emission spectral analysis, is from 900 to 2,200 ppm. According to the present invention, there is provided a means for improving the environmental stability of electrification, and the glossiness and the image density of the image to be formed in a good balance while maintaining sufficient low temperature fixability in a toner for electrostatic charge image development.Type: GrantFiled: September 28, 2016Date of Patent: April 3, 2018Assignee: KONICA MINOLTA, INC.Inventors: Shiro Hirano, Noboru Ueda, Kouji Sugama, Junya Onishi, Aya Shirai, Tatsuya Fujisaki
-
Publication number: 20170371256Abstract: An object of the present invention is to provide an electrostatic latent image developing toner containing: a binder resin; and a releasing agent, wherein the binder resin contains a crystalline polyester resin; an endothermic peak top temperature of the electrostatic latent image developing toner is 70° C. or more measured with differential scanning calorimetry (DSC) in a heating-up period of the toner; and a heat value ?Hc(L) is 15% or less with respect to a heat value ?Hc, wherein the heat value ?Hc(L) is a heat value in the range of (an exothermic peak top temperature rc?7° C.) or less; and the heat value ?Hc is a heat value of the total exothermic peak measured with DSC in a heating-down period of the toner.Type: ApplicationFiled: June 15, 2017Publication date: December 28, 2017Inventors: Aya SHIRAI, Kouji SUGAMA, Shiro HIRANO, Noboru UEDA
-
Patent number: 9846379Abstract: The production process of the present invention includes: a first step of heating a dispersion containing an aqueous medium and a binder resin containing a crystalline resin to a temperature higher than or equal to the melting point of the crystalline resin in a step of aggregating and fusing a fine particle of the binder resin containing the crystalline resin to produce a toner base particle; a second step of cooling the dispersion having been heated in the first step and having a temperature higher than the recrystallization temperature Rc of the crystalline resin to a temperature lower than Rc at a temperature-lowering rate of 1° C./min or higher; and a third step of maintaining the dispersion having been cooled in the second step at a temperature higher than or equal to Rc?25° C. and lower than or equal to Rc?5° C. for 30 minutes or longer.Type: GrantFiled: December 6, 2016Date of Patent: December 19, 2017Assignee: KONICA MINOLTA, INC.Inventors: Junya Onishi, Shiro Hirano, Noboru Ueda, Kouji Sugama, Aya Shirai
-
Patent number: 9760033Abstract: Provided is a toner for developing electrostatic images containing toner particles. The toner particles contain a crystalline resin and an amorphous resin. The amorphous resin contains an amorphous vinyl resin component containing a polymer of monomers having a structure represented by formula (1). The content of a structural unit derived from the monomers in the toner particles is within a range of 2.4 to 13.5 mass %. H2C?CR1—COOR2??(1) In formula (1), R1 represents a hydrogen atom or a methyl group and R2 represents a branched alkyl group having a carbon number of 8 or more.Type: GrantFiled: July 19, 2016Date of Patent: September 12, 2017Assignee: KONICA MINOLTA, INC.Inventors: Junya Onishi, Shiro Hirano, Aya Shirai
-
Publication number: 20170255114Abstract: A process for producing a toner of the present invention includes: a first step of heating a dispersion containing an aqueous medium and a binder resin containing a crystalline resin to a temperature higher than or equal to a melting point of the crystalline resin; and a second step of maintaining the dispersion at temperature T (° C.) for 30 minutes or longer in a state where a pH of the dispersion is maintained at 5.5 or higher and 9.0 or lower, in which the temperature T satisfies the following expression, Rc?25?T?Rc?5, where the Rc represents a recrystallization temperature (° C.) of the crystalline resin.Type: ApplicationFiled: February 22, 2017Publication date: September 7, 2017Inventors: Junya ONISHI, Shiro HIRANO, Noboru UEDA, Kouji SUGAMA, Aya SHIRAI
-
Publication number: 20170242357Abstract: An image forming method of the present invention uses a specific toner set. The toner set includes a yellow toner, a magenta toner, a cyan toner and a black toner, and each of these toners contains an amorphous resin, a crystalline resin and a colorant. The colorant of the black toner contains a conductive black colorant. There is a specific relationship between an exothermic peak temperature of the black toner and exothermic peak temperatures of the chromatic color toners.Type: ApplicationFiled: September 21, 2016Publication date: August 24, 2017Inventors: Aya Shirai, Junya Onishi, Shiro Hirano, Kouji Sugama, Noboru Ueda
-
Patent number: 9740122Abstract: The present toner is an electrostatic latent image developing toner, and contains a toner base particle. The toner base particle contains a binder resin and a release agent. The binder resin contains a crystalline resin and a vinyl resin. When the storage elastic modulus G? at 50° C. is defined as G?50° C., the peak top temperature (° C.) of a specific endothermic peak in DSC of the toner is defined as Tm, the measurement temperature (° C.) at a G? of 1×106 Pa is defined as TmA, and the measurement temperature (° C.) at a G? of 1×105 Pa is defined as TmB, the toner satisfies the following expressions (1) to (3): G?50° C.?1×108??(1) TmB?TmA?8??(2) Tm<TmB??(3).Type: GrantFiled: September 22, 2016Date of Patent: August 22, 2017Assignee: KONICA MINOLTA, INC.Inventors: Takaki Kawamura, Aya Shirai, Kaori Fujino
-
Publication number: 20170212436Abstract: The process for producing a toner according to the present invention includes: a first step of heating a dispersion containing an aqueous medium and a binder resin containing a crystalline resin to a temperature higher than or equal to the melting point of the crystalline resin; a second step of maintaining the temperature of the dispersion at temperature T1 for 30 minutes or longer; and a third step of maintaining the temperature of the dispersion at temperature T2 for 30 minutes or longer. In the following formula, Rc denotes the recrystallization temperature of the crystalline resin. Rc?10° C.?T1?Rc?5° C., Rc?25° C.?T2<Rc?10° C.Type: ApplicationFiled: January 25, 2017Publication date: July 27, 2017Inventors: Junya ONISHI, Shiro Hirano, Noboru Ueda, Kouji Sugama, Aya Shirai
-
Publication number: 20170205722Abstract: The present invention relates to a toner for electrostatic charge image development, including toner base particles containing a binder resin containing as a main component a vinyl resin having a constitutional unit derived from a monomer having an acid group, and aluminum, wherein a concentration of the aluminum in the toner base particles, as measured by radio inductively coupled plasma emission spectral analysis, is from 900 to 2,200 ppm. According to the present invention, there is provided a means for improving the environmental stability of electrification, and the glossiness and the image density of the image to be formed in a good balance while maintaining sufficient low temperature fixability in a toner for electrostatic charge image development.Type: ApplicationFiled: September 28, 2016Publication date: July 20, 2017Inventors: Shiro HIRANO, Noboru UEDA, Kouji SUGAMA, Junya ONISHI, Aya SHIRAI, Tatsuya FUJISAKI
-
Patent number: 9703220Abstract: The present invention relates to an image forming method using a yellow toner, a magenta toner, and a cyan toner, in which the yellow toner, the magenta toner, and the cyan toner respectively contain toner base particles containing a binder resin containing an amorphous polyester resin as a main component and a crystalline resin, aluminum, and a colorant, and the concentration of aluminum in the toner base particles of the yellow toner measured by high-frequency inductively coupled plasma emission spectral analysis satisfies a specific relation. According to the present invention, an image forming method and a toner set which can improve the thin paper separation property while maintaining favorable low temperature fixability are provided.Type: GrantFiled: September 28, 2016Date of Patent: July 11, 2017Assignee: KONICA MINOLTA, INC.Inventors: Shiro Hirano, Noboru Ueda, Kouji Sugama, Junya Onishi, Aya Shirai, Tatsuya Fujisaki