Patents by Inventor Toshihiro KAMADA
Toshihiro KAMADA 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: 11248136Abstract: Provided is an ink jet liquid composition including an organic solvent, a bifunctional urethane (meth)acrylate oligomer having a weight-average molecular weight of 2,000 to 15,000, a photopolymerization initiator, and a vinyl chloride-vinyl acetate copolymer, in which a content of the organic solvent is 40% by mass or more and 90% by mass or less with respect to a total mass of the liquid composition. Also provided is an ink jet recording method using the ink jet liquid composition.Type: GrantFiled: February 19, 2019Date of Patent: February 15, 2022Assignee: FUJIFILM CORPORATIONInventors: Tsutomu Umebayashi, Toshihiro Kamada, Yusuke Fujii
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Patent number: 10883010Abstract: An ink jet liquid composition contains an organic solvent, a polymerizable compound, a photopolymerization initiator, and a polyether-modified siloxane compound having a weight-average molecular weight of 3,000 or more, and the content of the organic solvent is 40% by mass or more and 90% by mass or less with respect to the total mass of the composition. In addition, an ink jet recording method using the ink jet liquid composition is provided.Type: GrantFiled: July 29, 2019Date of Patent: January 5, 2021Assignee: FUJIFILM CORPORATIONInventors: Yusuke Fujii, Tsutomu Umebayashi, Toshihiro Kamada
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Publication number: 20190352526Abstract: An ink jet liquid composition contains an organic solvent, a polymerizable compound, a photopolymerization initiator, and a polyether-modified siloxane compound having a weight-average molecular weight of 3,000 or more, and the content of the organic solvent is 40% by mass or more and 90% by mass or less with respect to the total mass of the composition. In addition, an ink jet recording method using the ink jet liquid composition is provided.Type: ApplicationFiled: July 29, 2019Publication date: November 21, 2019Inventors: Yusuke FUJII, Tsutomu UMEBAYASHI, Toshihiro KAMADA
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Patent number: 10435577Abstract: Provided are an ink set having: a colored ink including a solvent A1 at a content of 30% by mass or more, a polymer C1, and a colorant; and a clear ink including a solvent A2 at a content of 30% by mass or more and a bifunctional or higher-functional (meth)acrylate compound X2 having a weight average molecular weight of 1,000 to 30,000, the clear ink including X2 at a content of 5% by mass or more, in which the solubility of C1 in A2 is 10% by mass or higher; and an image forming method using this ink set.Type: GrantFiled: September 20, 2018Date of Patent: October 8, 2019Assignee: FUJIFILM CORPORATIONInventors: Toshihiro Kamada, Tsutomu Umebayashi
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Publication number: 20190185693Abstract: Provided is an ink jet liquid composition including an organic solvent, a bifunctional urethane (meth)acrylate oligomer having a weight-average molecular weight of 2,000 to 15,000, a photopolymerization initiator, and a vinyl chloride-vinyl acetate copolymer, in which a content of the organic solvent is 40% by mass or more and 90% by mass or less with respect to a total mass of the liquid composition. Also provided is an ink jet recording method using the ink jet liquid composition.Type: ApplicationFiled: February 19, 2019Publication date: June 20, 2019Inventors: Tsutomu UMEBAYASHI, Toshihiro KAMADA, Yusuke FUJII
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Publication number: 20190023928Abstract: Provided are an ink set having: a colored ink including a solvent A1 at a content of 30% by mass or more, a polymer C1, and a colorant; and a clear ink including a solvent A2 at a content of 30% by mass or more and a bifunctional or higher-functional (meth)acrylate compound X2 having a weight average molecular weight of 1,000 to 30,000, the clear ink including X2 at a content of 5% by mass or more, in which the solubility of C1 in A2 is 10% by mass or higher; and an image forming method using this ink set.Type: ApplicationFiled: September 20, 2018Publication date: January 24, 2019Inventors: Toshihiro KAMADA, Tsutomu UMEBAYASHI
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Patent number: 10100212Abstract: An ink composition contains (a) a compound which is represented by the following Formula (1) and has a specific molecular weight, (b) a colorant, (c) a polymer having an SP value of equal to or greater than 17 and equal to or less than 24, and (d) water, in which there is a specific relationship between a log P value of the component (a) and an SP value of the component (c). An ink set contains the ink composition, and an ink jet recording method uses the ink composition: R represents a specific alkyl group; Z1 represents a single bond, —NR1—, or —O—; Z2 represents —NR1— or —O—; at least one of Z1 or Z2 is —NR1—; R1 represents a hydrogen atom or a specific alkyl group; and L represents a specific alkylene group or —C2H4—O—C2H4—.Type: GrantFiled: July 25, 2016Date of Patent: October 16, 2018Assignee: FUJIFILM CorporationInventors: Katsuhiro Shimono, Katsuyuki Yofu, Seiya Sakurai, Toshihiro Kamada
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Publication number: 20160333209Abstract: An ink composition contains (a) a compound which is represented by the following Formula (1) and has a specific molecular weight, (b) a colorant, (c) a polymer having an SP value of equal to or greater than 17 and equal to or less than 24, and (d) water, in which there is a specific relationship between a log P value of the component (a) and an SP value of the component (c). An ink set contains the ink composition, and an ink jet recording method uses the ink composition: R represents a specific alkyl group; Z1 represents a single bond, —NR1—, or —O—; Z2 represents —NR1— or —O—; at least one of Z1 or Z2 is —NR1—; R1 represents a hydrogen atom or a specific alkyl group; and L represents a specific alkylene group or —C2H4—O—C2H4—.Type: ApplicationFiled: July 25, 2016Publication date: November 17, 2016Applicant: FUJIFILM CorporationInventors: Katsuhiro SHIMONO, Katsuyuki YOFU, Seiya SAKURAI, Toshihiro KAMADA
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Patent number: 9346968Abstract: An ink composition, including: water; a polymerizable compound; a polymerization initiator; and a ?-alkoxypropionamide compound represented by the following Formula (A): wherein, in Formula (A), R1 represents a linear or branched alkyl group having from 1 to 6 carbon atoms; each of R2 and R3 independently represents a hydrogen atom or a linear or branched alkyl group having from 1 to 4 carbon atoms; and R2 and R3 may be the same or different.Type: GrantFiled: March 6, 2015Date of Patent: May 24, 2016Assignee: FUJIFILM CorporationInventor: Toshihiro Kamada
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Patent number: 9139747Abstract: An image forming method has applying an ink composition winch includes: at least a pigment, water, and polyvalent (meth)acrylamide of 3.0 mass % or more and 15.0 mass % or less with respect to the entire ink composition as a polymerizable compound, to a coated paper having a pigment layer on at least one surface of a support in which cellulose pulp is a main component, using an ink jet method; at least drying the applied ink composition; and curing the ink composition on the coated paper by irradiating active energy rays at an illuminance of 1 W/cm2 or more and 2 W/cm2 or less to the ink composition which has undergone drying processing.Type: GrantFiled: February 20, 2013Date of Patent: September 22, 2015Assignee: FUJIFILM CorporationInventor: Toshihiro Kamada
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Publication number: 20150175819Abstract: An ink composition, including: water; a polymerizable compound; a polymerization initiator; and a ?-alkoxypropionamide compound represented by the following Formula (A): wherein, in Formula (A), R1 represents a linear or branched alkyl group having from 1 to 6 carbon atoms; each of R2 and R3 independently represents a hydrogen atom or a linear or branched alkyl group having from 1 to 4 carbon atoms; and R2 and R3 may be the same or different.Type: ApplicationFiled: March 6, 2015Publication date: June 25, 2015Inventor: Toshihiro KAMADA
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Patent number: 9045656Abstract: A black ink composition is provided which suppresses change in hue and can form an image with superior blocking resistance and scratch resistance. The black ink composition for ink jet recording includes a carbon black pigment; at least any one type of colorant pigment which is selected from a magenta pigment and a cyan pigment; a water-soluble polymerizable compound; a polymerization initiator; and water, wherein the average primary particle diameter of the carbon black pigment is 20 nm or more and less than 35 nm, the content ratio of the carbon black pigment with regard to the total mass of all of the pigments is 70 mass % or less, and the total mass of all of the pigments with regard to the total mass of the black ink composition is 4 mass % or less.Type: GrantFiled: August 28, 2012Date of Patent: June 2, 2015Assignee: FUJIFILM CorporationInventors: Misato Sasada, Toshihiro Kamada, Jun Matsumoto
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Patent number: 9016829Abstract: Disclosed is an ink composition including: (1) a pigment; (2) a polymerization initiator having a content of 2% by mass or more with respect to a total amount of the composition and having a solubility with respect to pure water at 25° C. of 5 to 8 g/l; (3) a compound A that is at least one selected from the group consisting of dimethylacrylamide, diethylacrylamide, N-isopropylacrylamide, dimethylacetamide, N-ethylpyrrolidone, 1-cyclohexyl-2-pyrrolidone, 1-(2-hydroxyethyl)-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone, tetramethylurea and gamma-valerolactone; (4) a polymerizable compound having two or more ethylenically unsaturated double bonds; and (5) water having a content of 50% by mass or more with respect to the total amount of the composition.Type: GrantFiled: August 10, 2012Date of Patent: April 28, 2015Assignee: FUJIFILM CorporationInventors: Atsushi Kaeriyama, Toshihiro Kamada, Kiyoshi Irita
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Patent number: 8905534Abstract: An ink composition having excellent storage stability and curing properties after an image formation and an image forming method using the ink composition are provided. An ink composition including (A) a polymerizable compound represented by the following general formula (1) and (B) a polymerization initiator and an image forming method using the ink composition. In the general formula (1), R1 represents a hydrogen atom or a methyl group. R2 represents a liner or branched alkylene group having 2 to 4 carbon atoms. However, in R2, it is not possible to have a structure in which an oxygen atom and a nitrogen atom which are bonded to both ends of R2 are bonded to the same carbon atom of R2. R3 represents a divalent linking group. k represents 2 or 3. x, y and z each independently represent an integer of 0 to 6 and x+y+z satisfies 0 to 18.Type: GrantFiled: January 3, 2014Date of Patent: December 9, 2014Assignee: FUJIFILM CorporationInventors: Akihito Amao, Hirotaka Kitagawa, Koji Yasuda, Toshihiro Kamada
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Patent number: 8859636Abstract: An ink composition includes: (Component a) a polymerizable compound having an ethylenically unsaturated double bond; (Component b) a polymerization initiator; (Component c) water; and (Component d) a polyhydric alcohol having an alkyleneoxy chain, wherein the (Component a) polymerizable compound includes a monofunctional polymerizable monomer having a (meth)acrylamide structure, and a content of the monofunctional polymerizable monomer is 5% by mass or more with respect to a total content of the (Component a) polymerizable compound.Type: GrantFiled: November 18, 2011Date of Patent: October 14, 2014Assignee: FUJIFILM CorporationInventors: Toshihiro Kamada, Takahiro Kato
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Publication number: 20140132685Abstract: An ink composition having excellent storage stability and curing properties after an image formation and an image forming method using the ink composition are provided. An ink composition including (A) a polymerizable compound represented by the following general formula (1) and (B) a polymerization initiator and an image forming method using the ink composition. In the general formula (1), R1 represents a hydrogen atom or a methyl group. R2 represents a liner or branched alkylene group having 2 to 4 carbon atoms. However, in R2, it is not possible to have a structure in which an oxygen atom and a nitrogen atom which are bonded to both ends of R2 are bonded to the same carbon atom of R2. R3 represents a divalent linking group. k represents 2 or 3. x, y and z each independently represent an integer of 0 to 6 and x+y+z satisfies 0 to 18.Type: ApplicationFiled: January 3, 2014Publication date: May 15, 2014Applicant: FUJIFILM CorporationInventors: Akihito AMAO, Hirotaka KITAGAWA, Koji YASUDA, Toshihiro KAMADA
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Patent number: 8529047Abstract: An aqueous ink composition including: a water-soluble polymerizable compound containing two or more polymerizable functional groups each selected from the group consisting of a (meth)acrylamide group, a maleimide group, a vinyl sulfone group, and an N-vinyl amide group, wherein a ratio of a molecular weight of the compound relative to a number of the polymerizable functional groups contained in a single molecule of the compound is 175 or less; a polymerization initiator; and water.Type: GrantFiled: February 24, 2011Date of Patent: September 10, 2013Assignee: FUJIFILM CorporationInventors: Koji Yasuda, Takahiro Kato, Yasufumi Ooishi, Hirotaka Kitagawa, Toshihiro Kamada
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Publication number: 20130050331Abstract: Disclosed is an ink composition including: (1) a pigment; (2) a polymerization initiator having a content of 2% by mass or more with respect to a total amount of the composition and having a solubility with respect to pure water at 25° C. of 5 to 8 g/l; (3) a compound A that is at least one selected from the group consisting of dimethylacrylamide, diethylacrylamide, N-isopropylacrylamide, dimethylacetamide, N-ethylpyrrolidone, 1-cyclohexyl-2-pyrrolidone, 1-(2-hydroxyethyl)-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone, tetramethylurea and gamma-valerolactone; (4) a polymerizable compound having two or more ethylenically unsaturated double bonds; and (5) water having a content of 50% by mass or more with respect to the total amount of the composition.Type: ApplicationFiled: August 10, 2012Publication date: February 28, 2013Applicant: FUJIFILM CORPORATIONInventors: Atsushi KAERIYAMA, Toshihiro KAMADA, Kiyoshi IRITA
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Publication number: 20130050366Abstract: A black ink composition is provided which suppresses change in hue and can form an image with superior blocking resistance and scratch resistance. The black ink composition for ink jet recording includes a carbon black pigment; at least any one type of colorant pigment which is selected from a magenta pigment and a cyan pigment; a water-soluble polymerizable compound; a polymerization initiator; and water, wherein the average primary particle diameter of the carbon black pigment is 20 nm or more and less than 35 nm, the content ratio of the carbon black pigment with regard to the total mass of all of the pigments is 70 mass % or less, and the total mass of all of the pigments with regard to the total mass of the black ink composition is 4 mass % or less.Type: ApplicationFiled: August 28, 2012Publication date: February 28, 2013Applicant: FUJIFILM CORPORATIONInventors: Misato SASADA, Toshihiro KAMADA, Jun MATSUMOTO
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Publication number: 20120186489Abstract: A cellulose acylate film containing a cellulose acylate and a carbohydrate derivative satisfying that the Clog P value thereof is from 0 to 5.5 and the maximum value of the molar extinction coefficient thereof in a wavelength range of from 230 nm to 700 nm is at most 50×103, wherein the hydroxyl groups in the carbohydrate derivative are substituted with at least two types of substituents and at least one of the substituents has at least one aromatic ring, and wherein the carbohydrate derivative is contained in an amount of from 1 part by mass to 30 parts by mass relative to 100 parts by mass of the cellulose acylate therein has a low water content, capable of preventing the deterioration of polarizer when it is stuck to polarizer and aged in high-temperature and high-humidity environments, having good optical characteristics expressibility and having a low haze.Type: ApplicationFiled: September 24, 2010Publication date: July 26, 2012Applicant: FUJIFILM CORPORATIONInventors: Nobutaka Fukagawa, Takahiro Ohno, Naoyuki Nishikawa, Toshihiro Kamada