Patents by Inventor Nobushige Tanaka
Nobushige Tanaka 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: 8710117Abstract: The present invention relates to crosslinked core/shell polymer particles containing a pigment which are usable in a water-based ink for ink-jet printing and exhibit excellent optical density and gloss and are prevented from suffering from occurrence of bronzing, wherein the polymer particles each include a core portion and a shell portion which are respectively made of a crosslinked polymer, and a weight ratio of the pigment to the pigment-containing crosslinked core/shell polymer particles [(weight of the pigment/weight of the pigment-containing crosslinked core/shell polymer particles)×100] is from 25 to 75. The present invention further relates to a water dispersion and a water-based ink for ink-jet printing which contain the crosslinked core/shell polymer particles and a process for producing crosslinked polymer particles.Type: GrantFiled: December 29, 2010Date of Patent: April 29, 2014Assignee: Kao CorporationInventors: Nobushige Tanaka, Takehiro Tsutsumi, Koji Azuma
-
Publication number: 20110092637Abstract: The present invention relates to crosslinked core/shell polymer particles containing a pigment which are usable in a water-based ink for ink-jet printing and exhibit excellent optical density and gloss and are prevented from suffering from occurrence of bronzing, wherein the polymer particles each include a core portion and a shell portion which are respectively made of a crosslinked polymer, and a weight ratio of the pigment to the pigment-containing crosslinked core/shell polymer particles [(weight of the pigment/weight of the pigment-containing crosslinked core/shell polymer particles)×100] is from 25 to 75. The present invention further relates to a water dispersion and a water-based ink for ink-jet printing which contain the crosslinked core/shell polymer particles and a process for producing crosslinked polymer particles.Type: ApplicationFiled: December 29, 2010Publication date: April 21, 2011Inventors: Nobushige TANAKA, Takehiro Tsutsumi, Koji Azuma
-
Patent number: 7909446Abstract: There are provided a water dispersion for ink-jet printing which contains a water dispersion of particles of a vinyl polymer or a polyester-based polymer which contain a colorant (B), and a water-insoluble organic compound (A) except for aliphatic acid derivatives; a water-based ink containing the water dispersion; a print obtainable by printing images or characters with the water-based ink; and a process for producing the water dispersion. Also, there are provided an ink set for ink-jet printing containing two or more kinds of inks having different colors from each other wherein the inks each contain a water dispersion of particles of a vinyl polymer or a polyester-based polymer which contain a colorant (B), and a water-insoluble organic compound (A) except for aliphatic acid derivatives; and a process for producing a print using the ink set. The water-based ink can provide multi-order color images or composite black images which exhibits a high optical density and is excellent in gloss and image clarity.Type: GrantFiled: October 6, 2005Date of Patent: March 22, 2011Assignee: Kao CorporationInventors: Isao Tsuru, Koji Azuma, Masato Hoshi, Nobushige Tanaka, Takehiro Tsutsumi
-
Patent number: 7741386Abstract: A water dispersion for inkjet printing which contains polymer particles containing a colorant. The polymer constituting the polymer particles is produced by the copolymerization of a monomer mixture in the presence of a-methylstyrene dimer. The water dispersion for inkjet printing and a water-based ink for inkjet printing containing the water dispersion exhibit excellent jetting properties and a high optical density.Type: GrantFiled: October 27, 2005Date of Patent: June 22, 2010Assignee: Kao CorporationInventors: Akira Umada, Koji Azuma, Nobushige Tanaka, Nobuyuki Takizawa, Takehiro Tsutsumi
-
Patent number: 7625958Abstract: Provided are a water dispersion for ink-jet printing, wherein it is a water dispersion of water-insoluble graft polymer particles containing a colorant; the above graft polymer contains a principal chain having a constitutional unit derived from a vinyl base monomer and a side chain which is derived from a macromer containing an aromatic ring and having a polymerizable functional group at one end; both of the Log P values of the above principal chain and the above side chain are positive; and a difference between both falls in a specific range, and a water-based ink containing the same. The above water-based ink is excellent in a discharge stability, a storage stability, a heat stability and a water resistance.Type: GrantFiled: July 28, 2005Date of Patent: December 1, 2009Assignee: KAO CorporationInventors: Nobushige Tanaka, Koji Azuma, Takehiro Tsutsumi
-
Publication number: 20090023854Abstract: A water dispersion for inkjet printing, which contains water-insoluble polymer particles containing a colorant. The content of the water-insoluble polymer in the water dispersion is from 1 to 7% by weight, and the surface tension of the water dispersion is 60 mN/m or higher at 20° C. A water-based ink for inkjet printing which contains the water dispersion produces printed images with a high optical density and a good color-to-color bleed resistance.Type: ApplicationFiled: November 1, 2005Publication date: January 22, 2009Applicant: KAO CORPORATIONInventors: Nobuyuki Takizawa, Akira Umada, Nobushige Tanaka, Takehiro Tsutsumi
-
Publication number: 20080234407Abstract: There are provided a water-based ink for ink-jet printing which not only satisfies a high optical density but also is excellent in gloss and image clarity upon printing on a coated paper; a water dispersion used in the water-based ink; and a process for producing the water dispersion.Type: ApplicationFiled: November 18, 2005Publication date: September 25, 2008Applicant: KAO CORPORATIONInventors: Nobushige Tanaka, Isao Tsuru, Masato Hoshi, Takehiro Tsutumi
-
Publication number: 20080192098Abstract: There are provided a water dispersion for ink-jet printing which contains a water dispersion of particles of a vinyl polymer or a polyester-based polymer which contain a colorant (B), and a water-insoluble organic compound (A) except for aliphatic acid derivatives; a water-based ink containing the water dispersion; a print obtainable by printing images or characters with the water-based ink; and a process for producing the water dispersion. Also, there are provided an ink set for ink-jet printing containing two or more kinds of inks having different colors from each other wherein the inks each contain a water dispersion of particles of a vinyl polymer or a polyester-based polymer which contain a colorant (B), and a water-insoluble organic compound (A) except for aliphatic acid derivatives; and a process for producing a print using the ink set. The water-based ink can provide multi-order color images or composite black images which exhibits a high optical density and is excellent in gloss and image clarity.Type: ApplicationFiled: October 6, 2005Publication date: August 14, 2008Applicant: KAO CORPORATIONInventors: Isao Tsuru, Koji Azuma, Masato Hoshi, Nobushige Tanaka, Takehiro Tsutsumi
-
Publication number: 20080064786Abstract: The present invention relates to crosslinked core/shell polymer particles containing a pigment which are usable in a water-based ink for ink-jet printing and exhibit excellent optical density and gloss and are prevented from suffering from occurrence of bronzing, wherein the polymer particles each include a core portion and a shell portion which are respectively made of a crosslinked polymer, and a weight ratio of the pigment to the pigment-containing crosslinked core/shell polymer particles [(weight of the pigment/weight of the pigment-containing crosslinked core/shell polymer particles)×100] is from 25 to 75. The present invention further relates to a water dispersion and a water-based ink for ink-jet printing which contain the crosslinked core/shell polymer particles and a process for producing crosslinked polymer particles.Type: ApplicationFiled: September 7, 2007Publication date: March 13, 2008Applicant: Kao CorporationInventors: Nobushige Tanaka, Takehiro Tsutsumi, Koji Azuma
-
Publication number: 20070289485Abstract: A water dispersion for inkjet printing which contains polymer particles containing a colorant. The polymer constituting the polymer particles is produced by the copolymerization of a monomer mixture in the presence of a-methylstyrene dimer. The water dispersion for inkjet printing and a water-based ink for inkjet printing containing the water dispersion exhibit excellent jetting properties and a high optical density.Type: ApplicationFiled: October 27, 2005Publication date: December 20, 2007Inventors: Akira Umada, Koji Azuma, Nobushige Tanaka, Nobuyuki Takizawa, Takehiro Tsutsumi
-
Patent number: 7244774Abstract: An aqueous dispersion for inkjet recording containing colorant-containing water-insoluble vinyl polymer particles dispersed in water, wherein the water-insoluble vinyl polymer contains a constitutive unit derived from a styrenic macromer (a) which has a polymerizable functional group at one end, wherein the styrenic macromer (a) has a number-average molecular weight of from 1000 to 5000 and a molecular weight distribution (weight-average molecular weight/number-average molecular weight) of from 1.0 to 2.5; and a water-based ink for inkjet recording containing the aqueous dispersion. The aqueous dispersion is capable of realizing a water-based ink for inkjet recording, which has excellent storage stability, a high optical density, and gives a high gloss.Type: GrantFiled: July 21, 2004Date of Patent: July 17, 2007Assignee: Kao CorporationInventors: Nobushige Tanaka, Koji Azuma, Takehiro Tsutsumi
-
Patent number: 7112619Abstract: A water-based ink containing an aqueous dispersion of water-insoluble vinyl polymer particles containing a pigment, wherein the water-insoluble vinyl polymer is prepared by copolymerizing a monomer mixture containing (a) a monomer having a salt-forming group, (b) a monomer having a long-chain alkyl group, (c) a macromer, (d) a monomer having a polyoxyalkylene group, and (e) a monomer copolymerizable with the monomer having a salt-forming group (a), the monomer having a long-chain alkyl group (b), the macromer (c) and the monomer having a polyoxyalkylene group (d). The water-based ink can be suitably used, for instance, as a water-based ink for inkjet recording and the like.Type: GrantFiled: December 22, 2003Date of Patent: September 26, 2006Assignee: Kao CorporationInventors: Makoto Sakakibara, Nobushige Tanaka, Ryuma Mizushima, Kenji Kaida, Takehiro Tsutsumi
-
Publication number: 20060030641Abstract: Provided are a water dispersion for ink-jet printing, wherein it is a water dispersion of water-insoluble graft polymer particles containing a colorant; the above graft polymer contains a principal chain having a constitutional unit derived from a vinyl base monomer and a side chain which is derived from a macromer containing an aromatic ring and having a polymerizable functional group at one end; both of the Log P values of the above principal chain and the above side chain are positive; and a difference between both falls in a specific range, and a water-based ink containing the same. The above water-based ink is excellent in a discharge stability, a storage stability, a heat stability and a water resistance.Type: ApplicationFiled: July 28, 2005Publication date: February 9, 2006Applicant: KAO CORPORATIONInventors: Nobushige Tanaka, Koji Azuma, Takehiro Tsutsumi
-
Publication number: 20050020731Abstract: An aqueous dispersion for inkjet recording containing colorant-containing water-insoluble vinyl polymer particles dispersed in water, wherein the water-insoluble vinyl polymer contains a constitutive unit derived from a styrenic macromer (a) which has a polymerizable functional group at one end, wherein the styrenic macromer (a) has a number-average molecular weight of from 1000 to 5000 and a molecular weight distribution (weight-average molecular weight/number-average molecular weight) of from 1.0 to 2.5; and a water-based ink for inkjet recording containing the aqueous dispersion. The aqueous dispersion is capable of realizing a water-based ink for inkjet recording, which has excellent storage stability, a high optical density, and gives a high gloss.Type: ApplicationFiled: July 21, 2004Publication date: January 27, 2005Applicant: Kao CorporationInventors: Nobushige Tanaka, Koji Azuma, Takehiro Tsutsumi
-
Publication number: 20040132942Abstract: A water-based ink containing an aqueous dispersion of water-insoluble vinyl polymer particles containing a pigment, wherein the water-insoluble vinyl polymer is prepared by copolymerizing a monomer mixture containing (a) a monomer having a salt-forming group, (b) a monomer having a long-chain alkyl group, (c) a macromer, (d) a monomer having a polyoxyalkylene group, and (e) a monomer copolymerizable with the monomer having a salt-forming group (a), the monomer having a long-chain alkyl group (b), the macromer (c) and the monomer having a polyoxyalkylene group (d). The water-based ink can be suitably used, for instance, as a water-based ink for inkjet recording and the like.Type: ApplicationFiled: December 22, 2003Publication date: July 8, 2004Applicant: Kao CorporationInventors: Makoto Sakakibara, Nobushige Tanaka, Ryuma Mizushima, Kenji Kaida, Takehiro Tsutsumi
-
Patent number: 6440429Abstract: An emulsified, water-in-oil type composition comprises the following components (A), (B), (C) and (D): (A) an oil phase, (B) a high molecular compound having orientation to oil-water interfaces, (C) a lower alcohol, and (D) water. A skin cosmetic preparation containing the emulsified, water-in-oil type composition is also disclosed.Type: GrantFiled: September 6, 1996Date of Patent: August 27, 2002Assignee: Kao CorporationInventors: Makoto Torizuka, Hirohisa Suzuki, Kana Fujiwara, Takashi Oda, Nobushige Tanaka, Katsuhiko Rindo