Quinacridone Pigment Or Derivative Patents (Class 106/495)
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Patent number: 7585364Abstract: A quinacridone derivative according to Formula (I): wherein R1 and R2 are each independently selected from the group consisting of hydrogen, alkyl, and halogen. Also, methods for preparing non-aqueous pigment dispersions and inkjet inks including a pigment and the quinacridone derivative of Formula (I).Type: GrantFiled: November 28, 2006Date of Patent: September 8, 2009Assignee: Agfa Graphics NVInventor: Geert Deroover
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Patent number: 7557150Abstract: A method for manufacturing a dispersion, the method including a step of forming a reaction product by allowing at least two types of liquids to react with each other, the dispersion including a dispersion medium and particles formed from the reaction product dispersed therein. In the method described above, the at least two types of liquids are ejected from independently provided respective nozzles so that traveling directions of the liquids ejected therefrom intersect with each other at an angle of 120° or less and so that the liquids then flow in an integrated manner, whereby the reaction product is generated.Type: GrantFiled: December 14, 2006Date of Patent: July 7, 2009Assignee: Canon Kabushiki KaishaInventors: Takayuki Teshima, Kazumichi Nakahama, Yukio Hanyu, Mamoru Sakashita, Akira Kuriyama
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Patent number: 7537654Abstract: A process for preparing coated nanoscale quinacridone pigment particles, includes: mixing a quinacridone pigment precursor or crude quinacridone pigment with a first solution including an acid to form nanoscale quinacridone pigment particles; adding the first solution and formed nanoscale quinacridone pigment particles into a second solution including deionized water to form a third solution and to precipitate the nanoscale quinacridone pigment particles; and washing the precipitated nanoscale quinacridone pigment particles in a fourth solution including a surface additive compound, whereby the surface additive compound coats the nanoscale quinacridone pigment particles; wherein the surface additive compound is a rosin compound.Type: GrantFiled: September 15, 2008Date of Patent: May 26, 2009Assignee: Xerox CorporationInventors: Roger E. Gaynor, C. Geoffrey Allen
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Patent number: 7534294Abstract: A process for preparing coated nanoscale quinacridone pigment particles, includes providing a first solution containing a surface additive compound in an acid; adding a quinacridone pigment precursor or crude quinacridone pigment into the first solution and causing the surface additive compound to coat formed nanoscale quinacridone pigment particles; and adding the first solution and coated nanoscale quinacridone pigment particles into a second solution containing deionized water to form a third solution and to precipitate the coated nanoscale quinacridone pigment particles; wherein the surface additive compound is a rosin compound.Type: GrantFiled: April 14, 2008Date of Patent: May 19, 2009Assignee: Xerox CorporationInventors: Roger E. Gaynor, C. Geoffrey Allen
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Patent number: 7503972Abstract: Two or more solutions comprising an organic pigment solution in which an organic pigment is dissolved in a good solvent, and a poor solvent compatible with the good solvent, or a solution of the poor solvent are allowed to flow through a microchannel in a non-laminar state; and organic pigment fine particles are deposited from the organic pigment solution in a course of flowing through the microchannel by changing the solubility of the organic pigment solution with the poor solvent or the solution of the poor solvent. As a result, nanometer-scale monodisperse organic pigment fine particles can be produced in a stable manner.Type: GrantFiled: October 1, 2007Date of Patent: March 17, 2009Assignee: FUJIFILM CorporationInventors: Hideharu Nagasawa, Masato Nakao
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Publication number: 20080314285Abstract: A quinacridone derivative according to Formula (I): wherein R1 and R2 are each independently selected from the group consisting of hydrogen, alkyl, and halogen. Also, methods for preparing non-aqueous pigment dispersions and inkjet inks including a pigment and the quinacridone derivative of Formula (I).Type: ApplicationFiled: November 28, 2006Publication date: December 25, 2008Applicant: AGFA GRAPHICS NVInventor: Geert Deroover
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Publication number: 20080308005Abstract: A non-aqueous pigment dispersion comprising a diketopyrrolo-pyrrole pigment, a polymeric dispersant and a dispersion synergist in a non-aqueous dispersion medium characterized in that said dispersion synergist is a diketopyrrolo-pyrrole derivative according to Formula (I): wherein R1, R2 and R3 are independently selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, an tert.-butyl group, a phenyl group, a cyano group and an acid group; R4, R5 and R6 are independently selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, an tert.-butyl group, a phenyl group and a cyano group; and characterized in that one of R7 and R8 is a group comprising two acid functions while the other one of R7 and R8 represents hydrogen.Type: ApplicationFiled: November 28, 2006Publication date: December 18, 2008Applicant: AGFA GRAPHICS NVInventor: Geert Deroover
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Publication number: 20080305261Abstract: A non-aqueous pigment dispersion includes a quinacridone pigment, a polymeric dispersant, and a dispersion synergist in a non-aqueous dispersion medium wherein the dispersion synergist is a quinacridone derivative substituted on one of the two nitrogen atoms of the quinacridone basic chromophore structure by a group including at least one carboxyl group or a salt thereof. Also, a method for printing an ink-jet image with an ink including the non-aqueous pigment dispersion.Type: ApplicationFiled: November 28, 2006Publication date: December 11, 2008Applicant: AGFA GRAPHICS NVInventors: Geert Deroover, Nicolas Point
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Patent number: 7427324Abstract: A nanoscale pigment particle composition includes a quinacridone pigment having at least one functional moiety, and a sterically bulky stabilizer compound having at least one functional group, wherein the functional moiety associates non-covalently with the functional group; and the presence of the associated stabilizer limits the extent of particle growth and aggregation, so as to afford nanoscale-sized particles of the pigment.Type: GrantFiled: November 1, 2007Date of Patent: September 23, 2008Assignee: Xerox CorporationInventors: Maria M. Birau, Rina Carlini, Karl W. Dawson, Sandra J. Gardner, C. Geoffrey Allen, Caroline M. Turek
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Patent number: 7427322Abstract: A method of producing a dispersion of a pigment, comprising: bringing a solution in which an organic pigment is dissolved, and an aqueous medium, into contact with each other in a channel having an equivalent diameter of 1 mm or less, thereby making the pigment into a fine particle thereof, wherein at least one of the solution and the aqueous medium comprises at least one anionic dispersing agent.Type: GrantFiled: August 13, 2007Date of Patent: September 23, 2008Assignee: FUJIFILM CorporationInventors: Hideki Maeta, Yuki Shimizu, Tadahisa Sato
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Patent number: 7427323Abstract: A nanoscale pigment particle composition includes a quinacridone pigment including at least one functional moiety, and a sterically bulky stabilizer compound including at least one functional group, wherein the functional moiety associates non-covalently with the functional group; and the presence of the associated stabilizer limits the extent of particle growth and aggregation, to afford nanoscale-sized particles.Type: GrantFiled: June 7, 2007Date of Patent: September 23, 2008Assignee: Xerox CorporationInventors: Maria M. Birau, Rina Carlini, C. Geoffrey Allen, Sandra J. Gardner, Karl W. Dawson, Peter G. Odell, Paul F. Smith, Caroline M. Turek, Roger E. Gaynor, Jeffrey H. Banning
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Patent number: 7419542Abstract: The invention is directed to a method or use of 2,9-dichloro-quinacridone as an alpha crystal phase inhibitor and optionally, 4,11-dichloroquinacridone during the beta-quinacridone or gamma-quinacridone crude pigment particle size reduction processes. The invention is also directed to solid solutions of quinacridone comprising about 98 to about 80 weight % gamma or beta-quinacridone, about 0.1 to about 10 weight % 2,9-dichloroquinacridone and about 0.1 to about 10 weight % 4,11-dichloroquinacridone.Type: GrantFiled: July 18, 2006Date of Patent: September 2, 2008Assignee: Ciba Specialty Chemicals CorporationInventors: Yingxia He, Colin Dennis Campbell, Gordian Schilling, Rhonda Carter, Melissa Wagner, James Thomas Will, Kevin Rodney Gerzevske
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Patent number: 7393404Abstract: A pigment dispersant contains the following component (a) alone or the following components (a) and (b) in combination: Component (a): a composite pigment formed of a diketopyrrolopyrrole pigment having a sulfonic group and another diketopyrrolopyrrole pigment having no sulfonic group, wherein the number of sulfonic group per molecule of the diketopyrrolopyrrole pigments in the composite pigment is from 0.05 to 0.5; and Component (b): a pigment other than the component (a), wherein the pigment has a sulfonic group or its metal salt, ammonium salt or amine salt. Also disclosed are a colored composition for color filters, a process for the fabrication of a color filter, the color filter fabricated by the process, an image display device including the color filter, and an information communication equipment including the image display device.Type: GrantFiled: February 15, 2006Date of Patent: July 1, 2008Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Hiroaki Saikatsu, Hiromitsu Yanagimoto, Naoto Kamata, Kazuhito Ooki, Yutaka Miura, Shigeru Sakamoto, Akio Yoshida, Michiei Nakamura
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Patent number: 7381260Abstract: A thiazineindigo pigment dispersant represented by Formula (1) or (2): where E denotes a basic group. A pigment composition contains a pigment material, and the thiazine indigo pigment dispersant. A colored composition contains the pigment composition and a pigment carrier. A color filter includes a filter segment prepared from the colored composition.Type: GrantFiled: April 18, 2007Date of Patent: June 3, 2008Assignee: Toyo Ink Mfg. Co., Ltd.Inventors: Masayuki Fujiki, Shoko Goto
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Patent number: 7347894Abstract: There is disclosed a pigment dispersant comprises the compound represented by the following formula (I) or a metal salt, ammonium salt, amine salt or alkylammoniumchloride salt thereof. Also disclosed are a colored composition for CF, a process for the fabrication of a CF, the color filter fabricated by the process, an image display device including the color filter, and an information communication equipment including the image display device.Type: GrantFiled: April 6, 2006Date of Patent: March 25, 2008Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Hiromitsu Yanagimoto, Hiroaki Saikatsu, Naoto Kamata, Shigeru Sakamoto, Akio Yoshida, Michiei Nakamura
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Patent number: 7311953Abstract: An object of the present invention is to obtain color filters having a high contrast, a high color purity and an improved transmittance for blue color, and a display using the color filters. In the present invention, there is used a colored composition for color filter comprising at least one coloring agent, a base polymer and at least one solvent, said base polymer containing a polyamicacid whose light transmittance decreases by 2% or less in the visible region (wavelength: 400 nm to 800 nm).Type: GrantFiled: August 11, 2004Date of Patent: December 25, 2007Assignee: Hitachi Displays, Ltd.Inventors: Kotaro Araya, Hiroshi Sasaki, Yasushi Tomioka
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Patent number: 7311769Abstract: A pigment composition containing a disazo pigment of formula (I) and at least one pigment from the group of organic orange, red and violet pigmentsType: GrantFiled: November 11, 2004Date of Patent: December 25, 2007Assignee: Clariant Produkte (Deutschland) GmbHInventors: Joachim Weber, Gerhard Wilker, Frank Alfter, Hans-Tobias Macholdt
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Patent number: 7252710Abstract: A pigment dispersion composition which can be suitably applied in such fields as color filters, black matrices and ink jet recording where it is necessary to finely disperse pigments still with retention of good dispersion stability and temporal stability even when the total amount a pigment derivative, pigment intermediate, colorant derivative and colorant intermediate, and/or a pigment dispersant is small. Another object is a pigment dispersion-based resist composition which can give color filters high in permeability, excellent in contrast and causing no bleeding or black matrices high in light-shielding and insulating properties, and causing no bleeding.Type: GrantFiled: June 26, 2003Date of Patent: August 7, 2007Assignee: Sakata Inx Corp.Inventors: Masanori Kano, Kazunori Itoh, Takaaki Yodo
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Patent number: 7211139Abstract: This invention relates to a method for production of nanoscale size quinacridones through a wet-salt attrition process by combining a crude quinacridone pigment in the presence of (i) an inorganic salt, (ii) an organic liquid in which the quinacridone pigment and salt are substantially insoluble, and (iii) a quinacridone derivative in an amount less than 10 wt. % relative to the quinacridone pigment; discharging the ground quinacridone pigment into water; adding an acid to produce a solution pH of 1.5 or lower; and isolating the quinacridone pigment.Type: GrantFiled: May 3, 2005Date of Patent: May 1, 2007Assignee: Sun Chemical CorporationInventors: George N. Robertson, Edward H. Sung
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Patent number: 7198667Abstract: Solid pigment preparations containing the following ingredients as substantial components: (A) 60–85 wt. % of at least one organic pigment, (B) 0.1–15 wt.Type: GrantFiled: November 28, 2003Date of Patent: April 3, 2007Assignee: BASF AktiengesellschaftInventors: Ingo Klopp, Juan Antonio Gonzalez Gomez, Uwe Mauthe, Hansulrich Reisacher, Andreas Stohr
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Patent number: 7192477Abstract: The process for producing highly concentrated nanometer-size fine particles of an organic pigment, which comprises dissolving the organic pigment in an amide solvent, especially an organic solvent comprising at least 50 vol % 1-methyl-2-pyrrodinone, and pouring the resultant organic pigment solution with stirring into a poor solvent which is not compatible with the organic pigment. The pigment may be a quinacridone pigment, phthalocyanine pigment etc. Any atmospheric pressure to a sub-critical and/or supercritical state can be employed as the production conditions.Type: GrantFiled: April 2, 2003Date of Patent: March 20, 2007Assignee: Japan Science and Technology AgencyInventors: Hachiro Nakanishi, Koich Baba, Hitoshi Kasai, Hidetoshi Oikawa, Shuji Oikawa
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Patent number: 7166158Abstract: The present invention relates to a novel quinacridone pigment compositions, a process using a mixed amine synthesis for the ultimate production of the compositions and to their use as colorants for pigmenting high molecular weight organic materials.Type: GrantFiled: July 13, 2004Date of Patent: January 23, 2007Assignee: Ciba Specialty Chemicals CorporationInventors: Valentina K. Mitina, Kevin Rodney Gerzevske, Stéphane Biry, Christine Halik
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Patent number: 7160380Abstract: A method of producing a fine particle of an organic pigment, containing the steps of: flowing a solution of an organic pigment dissolved in an alkaline or acidic aqueous medium, through a channel which provides a laminar flow; and changing a pH of the solution in the course of the laminar flow.Type: GrantFiled: September 21, 2004Date of Patent: January 9, 2007Assignee: Fuji Photo Film Co., Ltd.Inventors: Hideki Maeta, Yuki Shimizu, Tadahisa Sato
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Patent number: 7147703Abstract: The invention relates to a process for aftertreating organic pigments which comprises heating the unground or ground organic crude pigment in water and/or organic solvents by means of microwave irradiation, under pressure if desired, so that the mass temperature of the mixture reaches 30 to 250° C.Type: GrantFiled: September 16, 2005Date of Patent: December 12, 2006Assignee: Clariant GmbHInventors: Matthias Ganschow, Carsten Plueg
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Patent number: 7147704Abstract: A pigment dispersing agent wherein a quinophthalone structure is bonded to a triazine structure through an arylene group or a heteroaromatic ring and a basic functional group is bonded to triazine ring through a connecting group which pigment dispersing agent improves an ink or a coating in fluidity and is effective for preparing a product having a low viscosity and low thixotropic properties and having excellent properties such as tinting strength, transparency and viscosity stability with the passage of time, and a pigment composition and a pigment dispersion containing the same.Type: GrantFiled: March 20, 2006Date of Patent: December 12, 2006Assignee: Tokyo Ink Mfg. Co., LtdInventor: Yoshimitsu Ueno
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Patent number: 7135062Abstract: Image-recording, hydrophilic colorants having an organic pigment linked to a hydrophilic compound through a linking group and which are capable of forming images excellent in print quality such as chroma, gloss, density, light fastness and abrasion fastness, and also as hydrophilic colorants capable of affording inks excellent in physical properties such as long-term storability and press stability are described.Type: GrantFiled: June 11, 2004Date of Patent: November 14, 2006Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Michiei Nakamura, Hideyuki Koiso, Naoyuki Sakai, Yoshiyuki Zama, Atsushi Nogami, Hiroyuki Shimanaka, Seishichi Sasaki, Hiroaki Saikatsu
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Patent number: 7135067Abstract: The invention relates to a pigment dispersion consisting essentially of a) at least one organic or inorganic pigment or a combination of the same, b) an alpha-methyl--omega-hydroxy-polyethylene glycol ether having an average molar mass of between 250 and 1000 g/mol, c) standard dispersing agents for producing aqueous pigment dispersions, d) water, and e) optionally other standard additives.Type: GrantFiled: June 29, 2002Date of Patent: November 14, 2006Assignee: Clariant GmbHInventors: Andreas Harz, Lothar Wihan, Martin Alexander Winter, Andreas Pfrengle
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Patent number: 7122081Abstract: The present invention is directed to an aqueous process for reducing particle size of organic pigments by milling the crude pigment in the presence of a water soluble styrene copolymer dispersant, optionally a defoamer, optionally an additive, and greater than about 10 wt. % water, and isolating the organic pigment.Type: GrantFiled: November 12, 2004Date of Patent: October 17, 2006Assignee: Ciba Specialty Chemicals CorporationInventors: Yingxia He, Colin D. Campbell
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Patent number: 7101428Abstract: The invention is directed to a method or use of 2,9-dichloro-quinacridone as a crystal phase inhibitor during the beta-quinacridone or gamma-quinacridone crude pigment particle size reduction processes. 2,9-dichloroquinacridone is added to the milling composition of the crude gamma or crude beta quinacridone.Type: GrantFiled: November 12, 2004Date of Patent: September 5, 2006Assignee: Ciba Specialty Chemicals CorporationInventors: Yingxia He, Colin Campbell, Gordian Schilling, Rhonda Carter
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Patent number: 7077899Abstract: A pigment dispersing agent of the formula (1) capable of providing a printing ink or a coating composition excellent in fluidity and dispersion stability and a dry coating excellent in gloss, a pigment composition containing the same and a pigment dispersion containing the same, wherein X1 is —NH—, —O—, —CONH—, —SO2NH—, —CH2NH—, —CH2NHCOCH2NH— or —X3—Y—X4—, X2 and X4 are —NH— or —O—, X3 is —CONH—, —SO2NH—, —CH2NH—, —NHCO— or —NHSO2—, Y is an alkylene group, an alkenylene group or an arylene group, Z is —SO3M or —COOM, R1 is a heterocyclic ring residue or an aromatic ring residue, Q is —O—R2, —NH—R2, a halogen group, —X1—R1 or —X2—Y-Z, R2 is a hydrogen atom, an alkyl group or an alkenyl group, and M is one equivalent of a monovalent to trivalent cation.Type: GrantFiled: January 14, 2004Date of Patent: July 18, 2006Assignee: Toyo Ink Mfg. Co. Ltd.Inventors: Takashi Kamikubo, Daisuke Tanabe, Tetsuya Sai
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Patent number: 7074267Abstract: Pigment composition comprising an organic pigment and a combination of at least two normally water-soluble coloured compounds (dyes) of opposing charge, i.e. of at least one anionic and one cationic dye are provided. The compositions impart improved rheology on non-aqueous pigment based printing inks and paints.Type: GrantFiled: April 24, 2003Date of Patent: July 11, 2006Assignee: Ciba Specialty Chemicals CorporationInventors: Stephen John Coughlin, Iain Frank Fraser, Thomas Healy, Stuart Cook Niven
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Patent number: 7056378Abstract: The invention relates to a method for producing vattable organic pigments. The invention is characterized in that an agueous or an aqueous-organic suspension of a coarse crystalline raw mineral is vatted and re-oxidised, and the pigment suspension is ground to a diameter equal to or less than 0.9 mm during vatting and/or during oxidation by means of an agitator ball mill, which is operated at a power density of more than 1.0 KW per litre per grinding chamber and at an agitator peripheral speed of more than 12 m/s, using grinding bodies.Type: GrantFiled: March 17, 2003Date of Patent: June 6, 2006Assignee: Clariant GmbHInventors: Joachim Weber, Manfred Urban, Erwin Dietz
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Patent number: 7041166Abstract: Organic solid solution pigments are prepared and conditioned by treating a mixture of their components, after synthesis but preferably without or with only partial drying, in a mixture of from 0 to 30% by weight of an organic liquid having a dipole moment ? of 2.8–6.0·10?18 .esu (2.8 to 6.0 debye units) and from 70 to 100% by weight of water in an agitated media pearl mill having a specific power density of at most 2.0 kj·s?1 per liter of grinding space. Drying the starting components is especially suitable in the case of only slightly agglomerating, easy to wet pigments of specific surface area from 1 to 25 m2/g. The method gives excellent results, and is flexible and also much simpler than known methods.Type: GrantFiled: January 23, 2003Date of Patent: May 9, 2006Assignee: Ciba Specialty Chemicals CorporationInventors: Philippe Bugnon, Marc Maurer
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Patent number: 7033429Abstract: The present invention relates to a method of producing a low-dust pigment composition, which comprises suspending a filter cake obtained from preparation of the pigment, or a solid pigment, in water, adding thereto from 0.1 to 6.0% by weight, based On the weight of the pigment composition, of an amphoteric surfactant and, where appropriate, further adjuvants, and then drying the aqueous suspension to form granules, to the pigment composition obtainable according to that method, and to the use thereof in the production of colored plastics or colored polymeric particles.Type: GrantFiled: October 22, 2002Date of Patent: April 25, 2006Assignee: Ciba Specialty Chemicals CorporationInventor: Paolo Balliello
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Patent number: 7029526Abstract: The invention pertains to the field of green color filters and LCDs. It has been found that pigments with surprisingly improved coloristic, chemical and physical properties are obtained by salt-kneading a halogenated phthalocyanine pigment together with a yellow pigment of the disazo condensation, barbituric acid or azoquinolone series. The process takes place in the presence of an organic liquid and in the absence of binder or optionally in the presence of a relatively small amount of binder. Claimed are the process itself as well as the green pigment composition obtained by the process and compositions comprising it.Type: GrantFiled: October 10, 2002Date of Patent: April 18, 2006Assignee: Ciba Specialty Chemicals CorporationInventors: Véronique Hall-Goulle, Takashi Deno
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Patent number: 6942724Abstract: The present invention relates to methods of preparing modified organic colorant dispersions comprising the step of combining, in any order, i) an organic colorant; ii) an hydroxide reagent; and iii) an aqueous medium, to form a modified organic colorant dispersion. The methods further comprises a particle size reduction step. These steps can occur in either order. The organic colorant comprises at least one organic species having at least one carboxylic acid group. Modified organic colorants and uses of these modified organic colorants, including inkjet ink compositions, are also disclosed.Type: GrantFiled: April 16, 2003Date of Patent: September 13, 2005Assignee: Cabot CorporationInventor: Yuan Yu
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Patent number: 6936097Abstract: The present invention relates to methods of preparing modified organic colorant dispersions comprising the step of combining, in any order, i) an organic colorant; ii) an hydroxide reagent; and iii) an aqueous medium, to form a modified organic colorant dispersion. The methods further comprises a particle size reduction step. These steps can occur in either order. The organic colorant comprises at least one organic species having at least one ester group. Modified organic colorants and inkjet ink compositions are also disclosed.Type: GrantFiled: April 16, 2003Date of Patent: August 30, 2005Assignee: Cabot CorporationInventor: Alex I. Shakhnovich
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Patent number: 6926768Abstract: A pigment's etheramine sulfonic acid salt is described. Also described is a method for enhancing the performance of a pigment composition containing an organic pigment, comprising enhancing the dispersion of said pigment by adding to 100 parts of said pigment about 1 to 40 parts of a pigment's etheramine sulfonic acid salt.Type: GrantFiled: April 14, 2003Date of Patent: August 9, 2005Assignee: Sun Chemical CorporationInventors: Kevin A. Arthur, George H. Robertson, George McLaren, Stanislav G. Vilner, Ronald R. Forbes
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Patent number: 6918958Abstract: The invention relates to pigment dispersants of the formula (I), and to pigment preparations including at least one organic pigment and at least one pigment disperant of the formula (I): wherein Q1, R1, R2, E+, G+, s and n are defined in the specification.Type: GrantFiled: January 31, 2002Date of Patent: July 19, 2005Assignee: Clariant GmbHInventors: Joachim Weber, Gerhard Wilker, Klaus Brychcy, Erwin Dietz
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Patent number: 6916367Abstract: Processes for preparing modified pigments are described. In one embodiment, the process comprises the step of combining, in any order, a pigment having attached an electrophilic group and a thiol reagent comprising at least one —SH group and at least two ionic or ionizable groups. In a second embodiment, the process comprises the step of combining, in any order, a pigment having attached an electrophilic group and a thiopolymer comprising at least one —H group. Modified pigments are also described.Type: GrantFiled: May 9, 2003Date of Patent: July 12, 2005Assignee: Cabot CorporationInventor: Paul S. Palumbo
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Patent number: 6913642Abstract: Substantially crystalline organic pigments characterized by small particle size and narrow particle size distribution.Type: GrantFiled: July 8, 2004Date of Patent: July 5, 2005Assignee: Ciba Specialty Chemicals Corp.Inventors: Yves Grandidier, Albert Riegler, Klaus Ruf, Urs Schlatter
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Patent number: 6911073Abstract: The present invention relates to a process for preparing a polymer-modified pigment comprising the step of: combining, in any order, at least one pigment having attached at least one nucleophilic group, at least one polymer comprising at least one carboxylic acid group or salt thereof, and at least one coupling agent. At least one mediator compound may also be used. The modified pigments can be used in applications such as inkjet ink applications.Type: GrantFiled: May 5, 2003Date of Patent: June 28, 2005Assignee: Cabot CorporationInventors: Curtis E. Adams, Ronald J. Gambale
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Patent number: 6911075Abstract: The invention relates to a process for preparing pigments, which comprises subjecting a crude pigment or mixture of crude pigments and a crystalline inorganic salt or mixture of crystalline inorganic salts together, essentially in the absence of other constituents, to the action of a rotor having a tangential speed of at least 10 m/s, so that a temperature of at least 80° C. is attained by means of friction effects; and subsequently kneading the product of this treatment with an organic liquid, during which it is possible if desired to add additional substances selected from the group consisting of inorganic salts, inert additives and colorant. These pigments and their use in polymers, printing inks and colours filters are also claimed. The invention in particular relates to a novel pigment form of Pigment Violet 23 obtained by above-mentioned process and having higher colour strength and colour saturation as well as excellent other applications properties in particular in printing inks.Type: GrantFiled: December 4, 2002Date of Patent: June 28, 2005Assignee: CIBA Specialty Chemicals Corp.Inventors: Yves Grandidier, Albert Riegler, Klaus Ruf, Urs Schlatter, Takashi Deno
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Patent number: 6902613Abstract: A mixture of an organic nanosize pigment comprising of from 50 to 99% by weight of the nanosize pigment and 1 to 50% by weight based of a low molecular weight naphthalene sulfonic acid formaldehyde polymer and its use as a particle growth and crystal phase director for the preparation of a direct pigmentary organic pigment or in pigment finishing.Type: GrantFiled: November 14, 2003Date of Patent: June 7, 2005Inventor: Fridolin Bäbler
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Patent number: 6896726Abstract: The present invention relates to surface-treated organic pigments, to a process for their preparation and to their use in colouring a high molecular weight organic material. Compared with untreated pigments, the surface-treated pigments exhibit better rheological properties and/or no warping in the pigmenting of partially crystalline plastics.Type: GrantFiled: May 7, 2002Date of Patent: May 24, 2005Assignee: Ciba Specialty Chemicals Corp.Inventors: Philippe Bugnon, Caroline Sansonnens
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Patent number: 6890380Abstract: Organic pigments are conditioned by treating them, after synthesis but preferably without or with only partial drying, in a mixture of from 1 to 30% by weight of a neutral, polar liquid having a dipole moment ? of 2.8-6.0? 10?18 esu (2.8 to 6.0 debye units) and from 70 to 99% by weight of water in an agitated media pearl mill having a specific power density of at most 2.0 kJs??1 per liter of grinding space. Drying is especially suitable in the case of only slightly agglomerating, easy to wet pigments of specific surface area from 1 to 25 m2/g. The method gives excellent results, and is flexible and also much simpler than known methods.Type: GrantFiled: January 31, 2002Date of Patent: May 10, 2005Assignee: Ciba Specialty Chemicals CorporationInventors: Gerhard Giger, Jürgen Beyrich, Philippe Bugnon, Marc Maurer
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Patent number: 6881255Abstract: Pigment preparations comprising a) at least one pigment, b) at least one polyethyleneimine which is alkoxylated, especially ethoxylated and propoxylated and/or butoxylated, and c) at least one condensation product based on A) sulphonated aromatics, B) aldehydes and/or ketones and optionally C) one or more compounds selected from the group consisting of nonsulphonated aromatics, urea and urea derivatives.Type: GrantFiled: March 3, 2004Date of Patent: April 19, 2005Assignee: Bayer Chemicals AGInventors: Udo Herrmann, Dirk Pfützenreuter, Josef Witt, Hans-Jürgen Hartrumpf
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Patent number: 6864371Abstract: A novel method for the preparation of a beta quinacridone pigment is described by the oxidation of 6,13-dihydroquinacridone in the presence of polyvinyl pyrrolidone, a catalyst and optionally a particulate quinacridone or particle growth inhibitor using hydrogen peroxide as the oxidant.Type: GrantFiled: November 14, 2003Date of Patent: March 8, 2005Assignee: Ciba Specialty Chemicals CorporationInventor: Fridolin Bäbler
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Patent number: 6858073Abstract: The present application relates to a process for the manufacture of pigmented vitreous materials, as well as to pigmented vitreous materials, characterized by the use of soluble pigment precursors and preferably the absence of significant amounts of dispersants. These pigmented vitreous materials can be used as colored materials for any known purposes. Soluble pigment precursors comprising a partial structure are also claimed, wherein X1 is an aromatic or heteroaromatic ring, B is hydrogen or a group of the formula but at least one group B is not hydrogen, and L is a solubilizing group.Type: GrantFiled: February 4, 2004Date of Patent: February 22, 2005Assignee: Ciba Specialty Chemicals CorporationInventors: Patrice Bujard, Véronique Hall-Goulle, Zhimin Hao, Hitoshi Nagasue, Gerardus De Keyzer
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Patent number: 6849116Abstract: Quinophthalone derivatives have the general formula I where R1, R2, R3 and R5 are independently hydrogen, halogen or C1-C4-alkyl; R4 is —SO3H, —SO3+N+R6R7R8R9, —SO2NR6R7, —CH2NR6R7, —CH2R10, —COOH, —COO?N+R6R7R8R9, —COOR11, —COR11, —NO2 or C1-C4-alkyl; R6, R7, R8 and R9 are independently hydrogen; C1-C22-alkyl or C2-C22-alkenyl whose carbon chains may be interrupted by one or more moieties selected from the group consisting of —O—, —S—, —NR12—, —CO— and —SO2— and/or which may each be mono- or polysubstituted by hydroxyl, halogen, aryl, C1-C4-alkoxy and/or acetyl; C3-C8-cycloalkyl whose carbon skeleton may be interrupted by one or more moieties selected from the group consisting of —O—, —S—, —NR12— and —CO— and/or which may be mono- or polysubstituted by hydroxyl, halogen, aryl, C1-C4-alkoxy and/or acetyl; dehydroabietyl or aryl; R6 and R7 or R6, R7 and R8 are together a 5- to 7-membered cyclic radical which includes the nitrogen atom and may include further heteroatoms; R10 is R11 is alkyl R6; R12 isType: GrantFiled: June 22, 2001Date of Patent: February 1, 2005Assignee: BASF AktiengesellschaftInventors: Jianing He, Manfred Schröck