Plural Acyclic Azo Group Component Containing Patents (Class 106/31.52)
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Patent number: 6852154Abstract: The invention provides: an ink set comprising a yellow ink composition, a magenta ink composition, and a cyan ink composition, wherein the magenta ink composition contains as a colorant at least one member selected from compounds represented by the following formula (1) and salts thereof; and an ink set comprising two magenta ink compositions differing in color density, wherein the magenta ink composition having a lower color density contains as a colorant at least one member selected from compounds represented by the following formula (1) and salts thereof. Also disclosed are: an ink cartridge housing the ink set; a process for recording with the ink set; and recorded matter obtained by recording with the ink set.Type: GrantFiled: April 21, 2003Date of Patent: February 8, 2005Assignee: Seiko Epson CorporationInventors: Kazuhiko Kitamura, Hiroko Hayashi, Kyoichi Oka
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Patent number: 6835239Abstract: A novel fluorescent ink is provided which contains at least a coloring material and an aqueous liquid medium for dissolving the coloring material, wherein the coloring material comprises C.I. Acid Red 52 and at least one direct dye, the content of the C.I. Acid Red 52 ranging from 0.1 to 0.4% by weight based on the total amount of the ink, and the content of the direct dye ranging from 0.15 to 0.4% by weight based on the total amount of the ink, and the weight ratio of the direct dye to the C.I. Acid Red 52 is not higher than 1.6. This fluorescent ink is capable of forming prints with fluorescence of high intensity and with high water resistance.Type: GrantFiled: August 8, 2001Date of Patent: December 28, 2004Assignee: Canon Kabushiki KaishaInventors: Shinichi Hakamada, Shoji Koike, Akira Nagashima
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Publication number: 20040244642Abstract: An ink for use in ink jet recording which contains a dye and a pigment as colorants.Type: ApplicationFiled: April 23, 2004Publication date: December 9, 2004Applicant: Canon Kabushiki KaishaInventors: Ayako Uji, Noribumi Koitabashi, Yoshihisa Yamashita, Ryota Kato, Takeshi Miyazaki, Yasunori Fujimoto
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Patent number: 6824598Abstract: An ink set for ink-jet printing, having at least one ink of the ink set comprising a light dye load and a dark dye load with both the light dye load and the dark dye load being one color. The one color is selected from magenta, cyan, yellow and black; and the light dye load being at least one of air fade resistant, light fade resistant and humid color migration resistant. The invention also relates to a method of inkjet printing with such a method.Type: GrantFiled: December 3, 2002Date of Patent: November 30, 2004Assignee: Hewlett-Packard Development Company, L.P.Inventors: Matthew Thornberry, Eric L Burch, John L Stoffel
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Publication number: 20040187734Abstract: An inkjet recording ink set comprising at least two inks, wherein each of the inks contains at least one dye having an anionic group, and even when any two inks in the ink set are mixed, precipitation of the dye does not occur.Type: ApplicationFiled: March 23, 2004Publication date: September 30, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Takashi Ozawa, Toshiki Taguchi
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Publication number: 20040187738Abstract: An ink obtained by dissolving at least one specific dye in an aqueous medium, wherein the dyes contained in the ink all have a solubility of 15 g or more in 100 g of water at 25° C. under atmospheric pressure; and an ink set formed from the ink. The dye is preferably a dye having an oxidation potential of 1.0 V (vs SCE) or more, more preferably a specific azo dye having a heterocyclic group of a specific structure or an aromatic group which is bound directly to an azo group, or a specific phthalocyanine dye having a water-soluble group as a substitunet. According to the present invention, an ink, specifically an inkjet ink, and an ink set, which can print an image without disorder or beading due to ejection failure and ensure excellent ejection stability and durability, is provided.Type: ApplicationFiled: March 26, 2004Publication date: September 30, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Toshiki Taguchi, Naotaka Wachi
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Publication number: 20040182279Abstract: A lightfast colorant and a lightfast ink composition include a lightfast colorant that is derived by covalently binding a benzophenone derivative and a conventional colorant and that imparts effective lightfastness and long-term storage stability to an ink composition that is prepared with the same.Type: ApplicationFiled: March 18, 2004Publication date: September 23, 2004Applicant: Samsung Electronics Co., Ltd.Inventors: Kyung-hoon Lee, Seung-min Ryu, Yeon-kyoung Jung
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Patent number: 6793722Abstract: Inkjet ink composition with high chroma. The inkjet ink composition includes 0.1 to 15 weight % of Acid Red 92; at least one red colorant other than Acid Red 92; and an aqueous solution medium. By means of the addition of Acid Red 92, the chroma of magenta color of the ink composition is increased.Type: GrantFiled: December 20, 2002Date of Patent: September 21, 2004Assignee: Benq CorporationInventors: Chia-Hsin Chien, In-Shan Sir, Yu-Ting Lin
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Publication number: 20040154496Abstract: The invention provides an inkjet black ink ensuring excellent image durability capable of satisfactorily maintaining the image quality such as non-loosening of black and gradation even when the image is stored for a long period of time, which is a inkjet black ink having a discoloration rate constant (kvis) of 5.0×10−2 [hour−1] or less, which is measured by using an ozone gas, the ink comprising an aqueous medium having dissolved or dispersed therein at least one dye selected from (1) an azo dye having a specific structure where a heterocyclic group is bonded to both of two N atoms, (2) a phthalocyanine dye having a specific structure, (3) an azo dye having a specific structure where a 5-membered heterocyclic group is bonded to one of two N atoms and a 6-membered 2-amino heterocyclic group is bonded to the other, and (4) a bisazo dye constituted by a specific aromatic or heterocyclic group and an azo group.Type: ApplicationFiled: November 18, 2003Publication date: August 12, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventor: Toshiki Taguchi
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Patent number: 6764541Abstract: Disclosed is a colorant composition of the formula wherein R is an alkyl group, an aryl group, an arylalkyl group, or an alkylaryl group, and wherein R can be joined to the phenyl moiety to form a ring, R′ is an aromatic- or heteroaromatic-containing group, each Ra, independently of the others, is a halogen atom, an alkyl group, an alkoxy group, a nitrile group, a nitro group, an amide group, or a sulfonamide group, w is an integer of 0, 1, 2, 3, or 4, n is an integer representing the number of carbon atoms in each repeat alkylene oxide unit, and x is an integer representing the number of repeat alkylene oxide units, wherein said colorant has no more than one —OH, —SH, or primary or secondary amino group per molecule.Type: GrantFiled: April 24, 2003Date of Patent: July 20, 2004Assignee: Xerox CorporationInventors: Jeffery H. Banning, Donald R. Titterington, Clifford R. King
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Publication number: 20040138335Abstract: The present invention provides an aqueous ink composition including a hydrophilic organic solvent, a surfactant, and a colored fine particle dispersion which contains an oil-soluble dye, and exhibiting a dynamic surface tension of 25 to 35 mN/m, as well as an ink-jet recording method including a step of carrying out recording using the aqueous ink composition.Type: ApplicationFiled: July 21, 2003Publication date: July 15, 2004Inventors: Kenji Ikeda, Takahiro Ishizuka
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Publication number: 20040128775Abstract: The invention relates to a dye mixture essentially consisting of one dye of formula (4) and a dye of formula (5). The black dye mixture is advantageously used for ink jet printing and provides high light-resisting and neutral black ink formulations.Type: ApplicationFiled: November 21, 2003Publication date: July 8, 2004Inventors: Andreas Wuzik, Josef Geisenberger, Heidemarie Menzel
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Publication number: 20040129172Abstract: An ink, which contains at least one dye of formula (1):Type: ApplicationFiled: August 1, 2003Publication date: July 8, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Toru Harada, Naotaka Wachi
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Publication number: 20040123773Abstract: An ink composition comprising: a self-dispersing carbon black, a binder, a stabilizing dye comprising at least as many groups comprising CO2H or COSH as groups comprising SO3H, and an aqueous vehicle. The stabilizing dye can improve the reliability and performance of the ink composition. The addition of the stabilizing dye can reduce or prevent the formation of material that blocks the printhead vias and throats as a result of the presence of a binder in the ink. The ink composition can reduce the amount of maintenance needed to retain all of a printhead's nozzles through the life of the printhead.Type: ApplicationFiled: December 30, 2002Publication date: July 1, 2004Inventors: Susan Butler, Meagan Winkler
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Patent number: 6749674Abstract: Disclosed are metal complexes of trisazo dyes of the general formula 4 wherein R1 through R6 are as defined in the specification. The dyes are useful for dyeing and printing natural and synthetic fiber materials, recording fluids, especially for the inkjet process, liquid formulations for paper pulp dyeing, and also as colorants for electrophotographic toners, powder coatings and color filters including the dyes of the invention.Type: GrantFiled: March 23, 2001Date of Patent: June 15, 2004Assignee: Clariant GmbHInventors: Josef Geisenberger, Andreas Wuzik
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Patent number: 6746526Abstract: 1. A compound of Formula (1) and salts thereof: wherein: A is a substituted phenyl group carrying a group of the formula —NR3R4 and an ortho group selected from sulpho, phosphonato and phosphinato; n is 0 or 1; L1 and L2 are each independently H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl, or L1 and L2 together with the N atom to which they are attached form an optionally substituted 5- or 6-membered ring; R1 and R2 are each independently optionally substituted alkyl or optionally substituted alkoxy; and R3 and R4 are each independently H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl, or R3 and R4 together with the nitrogen atom to which they are attached form an optionally substituted 5- or 6-membered ring; or R3 is H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl and R4 is an acyl group.Type: GrantFiled: March 27, 2002Date of Patent: June 8, 2004Assignee: Avecia LimitedInventor: Prahalad Manibhai Mistry
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Patent number: 6746525Abstract: A compound comprising a disazo chromaphore and an optionally substituted acyl group linked together through a —SO2—NH— group, inks comprising these compounds, ink jet printer cartridges containing these inks and their use in ink jet printing.Type: GrantFiled: March 18, 2002Date of Patent: June 8, 2004Assignee: Avecia LimitedInventor: Mark Robert James
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Patent number: 6737517Abstract: A metal chelated azo dyestuff containing at least one hydrophilic group and having formula (1): wherein M is a metal; A, B and C are each independently a substituted or unsubstituted aromatic ring; D is an aromatic ring optionally substituted by a group other than an azo group; m is 0 or 1; n is an integer from 0 to 3; p is an integer from 0 to 2; q is an integer from 1 to 3; with the proviso that in the event of a plurality of B's, they are the same or different; R1 and R2 are each independently hydrogen or a substituent group; M is tridentate or of higher coordination; and optionally a metal ion coordinated to A and B, B and B in the event of plural B's separated by azo or B and C, in the form of the structure: —O—M—O—.Type: GrantFiled: August 12, 2002Date of Patent: May 18, 2004Assignee: Mitsubishi Chemical CorporationInventor: Wataru Shimizu
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Publication number: 20040089198Abstract: A process for coloration of a substrate comprising applying thereto by means of an ink jet printer a composition comprising a medium and a compound of Formula (1): 1Type: ApplicationFiled: September 11, 2003Publication date: May 13, 2004Inventors: Christine Millard, Clive Edwin Foster, Peter Gregory
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Publication number: 20040083560Abstract: A method of colouring porous material, especially human hair, is described, which method comprises applying to the material being coloured, in any desired order successively, or simultaneously, a) a capped diazonium compound and b) a water-soluble coupling component under conditions such that, initially, coupling does not take place, and then causing the capped diazonium compound present on the material to react with the coupling component.Type: ApplicationFiled: September 3, 2003Publication date: May 6, 2004Inventors: Jean-Marie Adam, Taher Yousaf, Beate Frhling
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Publication number: 20040083924Abstract: Compouns of formula (I) 1Type: ApplicationFiled: August 1, 2003Publication date: May 6, 2004Inventor: Martin Oberholzer
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Patent number: 6712893Abstract: A compound of Formula (1) and salts thereof: In the formula, m is 1, 2 or 3; X is H or SO3H; R1 and R2 are each independently selected from optionally substituted alkyl and optionally substituted alkoxy; and R4 and R5 are each independently H, optionally substituted alkyl or optionally substituted aryl. When (i) at least one of R1 and R2 carries an —OH group; and (ii) when X is H at least one of R1 and R2 is optionally substituted alkyl. The compounds are useful as dyes for ink jet printing inks.Type: GrantFiled: June 28, 2001Date of Patent: March 30, 2004Assignee: Avecia LimitedInventors: Prahalad Manibhai Mistry, Roy Bradbury
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Patent number: 6706104Abstract: An ink set which comprises a black ink containing an aqueous medium and a pigment dispersed in the aqueous medium by an action of an ionic group, and at least two color inks each containing a coloring material and an aqueous medium, wherein (i) respective images formed with the respective color inks have the same &Dgr;E or have the difference in &Dgr;E that is 10 or less in a CIELAB color space display system in a fading test under conditions that cause fading corresponding to pseudo-indoor sunlight fading through a window for 3 years or more, and (ii) at least one of the color inks contains at least one of a coloring material and an additive that destabilize dispersion stability of the pigment in the black ink. The ink set can provide a high quality multicolor image keeping color balance after long preservation and showing less bleeding between black and color regions.Type: GrantFiled: August 31, 2001Date of Patent: March 16, 2004Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Takuhara, Yoshihisa Takizawa, Kumiko Mafune, Hisashi Teraoka, Yoichi Takada, Noriyasu Asaki, Yuko Takada, Tsuyoshi Kanke
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Publication number: 20040040466Abstract: To provide a black aqueous ink composition for excellent light and gas fastness, an ink set including the ink composition, and an ink jet recording process using the same, the black aqueous ink composition contains at least a trisazo dye represented by Chemical Formula 31.Type: ApplicationFiled: October 24, 2002Publication date: March 4, 2004Applicants: SEIKO EPSON CORPORATION, ORIENT CHEMICAL INDUSTRIES, LTD.Inventors: Tetsuya Aoyama, Kazuhiko Kitamura, Hiroshi Fukumoto, Yoshihiro Sawatari, Shuji Sugawara, Makiko Matsui
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Patent number: 6695899Abstract: A compound of Formula (1) and salts thereof: wherein: A is a substituted phenyl group carrying a group of the formula —NR3R4 and an ortho carboxy group; n is 0 or 1; L1 and L2 are each independently H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl, or L1 and L2 together with the N atom to which they are attached form an optionally substituted 5- or 6-membered ring; R1 and R2 are each independently optionally substituted alkyl or optionally substituted alkoxy; and R3 and R4 are each independently H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl, or R3 and R4 together with the N atom to which they are attached form an optionally substituted 5- or 6-membered ring; or R3 is H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl; and R4 is an acyl group.Type: GrantFiled: March 26, 2002Date of Patent: February 24, 2004Assignee: Avecia LimitedInventor: Prahalad Manibhai Mistry
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Patent number: 6689201Abstract: A compound of Formula (1) and salts thereof are useful as dyes for ink jet printing inks. In the formula (1), A is optionally substituted phenyl (other than carboxyl substituted); R1 and R2 are each independently optionally substituted alkyl or optionally substituted alkoxy; and R4 and R5 are each independently H, alkyl or optionally substituted aryl. In formula (1) at least one of R1 and R2 carries an —OH group.Type: GrantFiled: June 28, 2001Date of Patent: February 10, 2004Assignee: Avecia LimitedInventors: Prahalad Manibhai Mistry, Roy Bradbury
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Publication number: 20040020404Abstract: A process for printing an image on a substrate comprising applying thereto a composition comprising a liquid medium and a compound of Formula (1):Type: ApplicationFiled: April 11, 2003Publication date: February 5, 2004Applicant: Avecia LimitedInventors: Ajay Haridas Popat, Alan Dickinson, Maria Soteri Hadjisoteriou, Neil James Thompson, Paul Wight, Peter Gregory, Roy Bradbury, Philip John Double, Thomas Paul
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Patent number: 6673140Abstract: The present invention is drawn to ink-jet inks that can be used with cyan, magenta, and yellow ink set systems for improved image gamut and lightfastness while maintaining good chroma in the case of color ink and lightness in the case of black ink. More specifically, in an embodiment of the invention, ink sets can comprise specific ink-jet inks having low dye load dyes for use in six-ink systems, for example.Type: GrantFiled: March 11, 2002Date of Patent: January 6, 2004Assignee: Hewlett-Packard Development Company, L.P.Inventors: Paul Tyrell, Patricia A Wang, Charles G. Dupuy
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Patent number: 6652637Abstract: A compound of Formula (1) and salts thereof are useful as dyes for ink jet printing inks. In Formula (I) m is 1, 2 or 3; R1 and R2 are each independently optionally substituted alkoxy; and R4 and R5 are each independently H, optionally substituted alkyl or optionally substituted aryl; provided that at least one of R1 and R2 carries an —OH group.Type: GrantFiled: June 28, 2001Date of Patent: November 25, 2003Assignee: Avecia LimitedInventors: Prahalad Manibhai Mistry, Roy Bradbury
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Publication number: 20030172839Abstract: The present invention is drawn to ink-jet inks that can be used with cyan, magenta, and yellow ink set systems for improved image gamut and lightfastness while maintaining good chroma in the case of color ink and lightness in the case of black ink. More specifically, in an embodiment of the invention, ink sets can comprise specific ink-jet inks having low dye load dyes for use in six-ink systems, for example.Type: ApplicationFiled: March 11, 2002Publication date: September 18, 2003Inventors: Paul Tyrell, Patricia A. Wang, Charles G. Dupuy
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Publication number: 20030149251Abstract: The present invention provides a black dyestuff for inkjet recording which exhibits a good achromaticity as well as a good light-resistance and a recording liquid containing the black dyestuff.Type: ApplicationFiled: August 12, 2002Publication date: August 7, 2003Applicant: Mitsubishi Chemical CorporationInventor: Wataru Shimizu
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Publication number: 20030127017Abstract: A dye for ink-jet printing on both hydrophilic and hydrophobic papers. The dye includes a chromophore ionically coupled to a counterion. One of the chromophore and the counterion includes a hydrophilic moiety. The other includes a hydrophobic moiety.Type: ApplicationFiled: October 31, 2001Publication date: July 10, 2003Inventors: David M. Schut, Christian Schmid
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Publication number: 20030110980Abstract: An ink set for ink-jet printing, having at least one ink of the ink set comprising a light dye load and a dark dye load with both the light dye load and the dark dye load being one color. The one color is selected from magenta, cyan, yellow and black; and the light dye load being at least one of air fade resistant, light fade resistant and humid color migration resistant. The invention also relates to a method of inkjet printing with such a method.Type: ApplicationFiled: December 3, 2002Publication date: June 19, 2003Inventors: Matthew Thornberry, Eric L. Burch, John L. Stoffel
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Patent number: 6558459Abstract: An inkjet ink is provided that employs one or more water-soluble colorants or water-insoluble colorants, such as solvent dyes, disperse dyes, or pigments. The colorant, whether water-soluble or water-insoluble, is derivatized with one or more crown ethers to render the water-insoluble colorants soluble in water and in water-miscible organic solvents commonly employed in inkjet printing, particularly thermal inkjet printing, and to impart improved properties to the colorants, such as lightfastness, smearfastness, and waterfastness. The inkjet ink comprises a vehicle and at least one crown ether derivatized colorant. The resulting inkjet ink evidences improved print quality properties, compared to inkjet inks containing colorants that are not so derivatized.Type: GrantFiled: February 27, 2001Date of Patent: May 6, 2003Assignee: Hewlett-Packard Development CompanyInventor: David M. Schut
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Patent number: 6559292Abstract: Compounds of Formula (1) and salts thereof: wherein: A is optionally substituted phenyl; R1 and R2 are each independently optionally substituted alkyl or optionally substituted alkoxy; and R4 and R5 are each independently H, optionally substituted alkyl or optionally substituted aryl; provided that (i) at least one of R1 and R2 carries an —OH group; and (ii) A is not of the formula: wherein m is 1, 2 or 3. The compounds are useful as dyes for ink jet printing inks.Type: GrantFiled: June 28, 2001Date of Patent: May 6, 2003Assignee: Avecia LimitedInventors: Prahalad Manibhai Mistry, Roy Bradbury
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Patent number: 6551390Abstract: Compositions comprising (a) a dye of the Formula (1) or a salt thereof; and (b) a dye of the Formula (2) or a salt thereof: wherein R1 to R10, a and b are as defined in the description. Also claimed are liquid compositions and inks containing the dyes, an ink jet printing process using the inks, an ink jet printer cartridge containing the ink and an ink jet printer containing the cartridge.Type: GrantFiled: June 22, 2001Date of Patent: April 22, 2003Assignee: Avecia LimitedInventors: Aidan Joseph Lavery, Janette Watkinson, Paul Francis Mahon
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Patent number: 6521030Abstract: A set of inkjet inks with at least one of light magenta ink having high lightfastness magenta dye, a light cyan ink having high lightfastness cyan dye, light yellow ink having high lightfastness yellow dye and light black having high lightfastness black dye.Type: GrantFiled: June 20, 2000Date of Patent: February 18, 2003Assignee: Hewlett-Packard CompanyInventor: John L Stoffel
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Publication number: 20030024435Abstract: Black-dyeing aqueous inks comprisingType: ApplicationFiled: January 29, 2002Publication date: February 6, 2003Inventors: Urs Lehmann, Athanassios Tzikas, Marcel Frick
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Patent number: 6511535Abstract: The invention relates to a method for printing fibrous textile materials using the ink-jet printing technique, wherein the fibrous materials are printed with an aqueous ink that comprises at least one acid dye according to claim 1 and that has a viscosity of from 1 to 40 mPa·s.Type: GrantFiled: January 3, 2001Date of Patent: January 28, 2003Assignee: Ciba Specialty Chemicals CorporationInventors: Roger Lacroix, Peter Scheibli, Mickael Mheidle
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Patent number: 6503308Abstract: The present invention provides black ink compositions for use in inkjet printing, which exhibit improved neutral color, light fastness, and gray scale properties. The black ink compositions generally include a mixture of two or more black dyes in balanced concentrations to obtain black ink having the improved properties while retaining good print-ability in an inkjet pen. In one aspect, a black ink composition may include a mixture of pacified Reactive Black 31 and Direct Black 168.Type: GrantFiled: December 20, 2000Date of Patent: January 7, 2003Assignee: Hewlett-Packard CompanyInventors: Rodney D. Stramel, Kai Kong Iu
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Patent number: 6500247Abstract: Black-dyeing aqueous inks having good black shades without a shade change in artificial light and outstanding lightfastness comprising 20 to 95% by weight of at least one dye (A), together with 5 to 80% by weight of at least one dye chosen from the group consisting of (B) and (C), based on the total weight of the dyes (A), (B) and (C) in the ink, and 1 to 40% by weight of a water-miscible organic solvent, based on the total weight of the ink, the dye (A) containing, as the colouring part of the molecule, one or more radicals of the formula (I), (II), (III) or (IV) the dye (B) containing, as the colouring part of the molecule, one or more mono- or disazo radicals containing sulfo groups or one or more radicals of the formula (V), (VI), (VII) or (VIII) and the dye (C) containing, as the colouring part of the molecule, one or more mono- or disazo radicals containing sulfo groups or one or more radicals of the formulae (V), (VI), (VII) or (VII) and one or more radicals of the fType: GrantFiled: February 1, 2000Date of Patent: December 31, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: Urs Lehmann, Althanassios Tzikas, Marcel Frick
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Patent number: 6482256Abstract: An ink set is provided which can realize images having excellent lightfastness and color reproduction. The ink set comprises magenta ink compositions, the magenta ink compositions containing specific compounds as colorants.Type: GrantFiled: April 28, 2000Date of Patent: November 19, 2002Assignee: Seiko Epson CorporationInventors: Miharu Kanaya, Jun Ito, Hiroshi Fukumoto
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Patent number: 6471757Abstract: An ink of the present invention has a dye and a pigment. The pigment is a self-dispersant type pigment and an anionic dye in which at least one anionic group is bound on a surface of the pigment directly or through another atomic group and having a Ka value of less than 1 ml·m−2·msec−½ according to a Bristow method. An image having an excellent image quality is formed by using such an ink in the process of ink jet recording.Type: GrantFiled: October 26, 1998Date of Patent: October 29, 2002Assignee: Canon Kabushiki KaishaInventors: Noribumi Koitabashi, Yoshihisa Takizawa, Yutaka Kurabayashi, Takeo Eguchi
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Patent number: 6464768Abstract: The invention relates to a dye in which R1 is hydrogen, alkyl of 1 to 4 carbon atoms, or alkoxy of 1 to 4 carbon atoms; R2 is hydrogen, carboxyl, chloro or nitro; R21 is hydrogen; or R2 and R21 together form a benzene ring which is fused on in positions 3 and 4 of the ring A and can carry 1, 2 or 3 sulfo groups; m is a number from 0 to 1; n is a number from 1 to 2; M+ is a cation or a mixture of different cations, at least one equivalent of the cations M+ per mole of the dye being lithium cations and/or cations of the formula (II) where p is a number from 1 to 30; X is CH2CH2, CH(CH3)CH2, CH2CH(CH3) or a combination thereof and R3, R4 and R5 independently of one another are hydrogen, a group of the formula (III) —(—X—O—)pH (III) or an aliphatic radical of 1 to 18 carbon atoms. Dyes of the formula (I) are particularly suitable as colorants in inkjet inks.Type: GrantFiled: July 12, 1999Date of Patent: October 15, 2002Assignee: Clariant GmbHInventors: Wolfgang Bauer, Heidemarie Menzel, Josef Geisenberger, Reinhard Pedrazzi
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Publication number: 20020144626Abstract: An inkjet ink is provided that employs one or more water-soluble colorants or water-insoluble colorants, such as solvent dyes, disperse dyes, or pigments. The colorant, whether water-soluble or water-insoluble, is derivatized with one or more crown ethers to render the water-insoluble colorants soluble in water and in water-miscible organic solvents commonly employed in inkjet printing, particularly thermal inkjet printing, and to impart improved properties to the colorants, such as lightfastness, smearfastness, and waterfastness. The inkjet ink comprises a vehicle and at least one crown ether derivatized colorant. The resulting inkjet ink evidences improved print quality properties, compared to inkjet inks containing colorants that are not so derivatized.Type: ApplicationFiled: February 27, 2001Publication date: October 10, 2002Inventor: David M. Schut
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Patent number: 6454844Abstract: An ink set is provided which can bring good lightfastness and can realize images having excellent color reproduction. The ink set comprises a yellow ink composition, two magenta ink compositions different from each other in color density, and two cyan ink compositions different from each other in color density. The ink compositions contain respective specific compounds as colorants.Type: GrantFiled: April 7, 2000Date of Patent: September 24, 2002Assignee: Seiko Epson CorporationInventor: Miharu Kanaya
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Patent number: 6451989Abstract: Provided are novel black azo dyes which are useful in ink compositions, especially ink jet ink compositions. The dyes and ink compositions of the present invention exhibit a good balance of optical density, print reliability, water fastness and light fastness.Type: GrantFiled: June 18, 2001Date of Patent: September 17, 2002Assignee: Lexmark International, Inc.Inventors: Bradley Leonard Beach, Ann P Holloway, James F Feeman
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Patent number: 6395885Abstract: The use of lithium as a cation for an anionic dye to enhance the light-fastness of the dye. Also claimed are the lithium salts of certain anionic dyes as defined in the description; mixed lithium/sodium salts of an anionic dye wherein the molar ratio of lithium to sodium is from 1:4 to 99:1 and at least 20 mole % of the total counter ions in the dye are lithium cations; inks containing the dyes; a method of ink jet printing using the inks; a substrate printed with the inks; an ink jet printer cartridge containing the ink and a ink jet printer containing the ink jet printer cartridge.Type: GrantFiled: December 5, 2000Date of Patent: May 28, 2002Assignee: Avecia LimitedInventors: Aidan Joseph Lavery, Janette Watkinson, John Parker Meyers
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Patent number: 6387168Abstract: Disclosed herein is an ink comprising a first pigment, a second pigment and a dispersant, both of the pigment being dispersed in an aqueous medium, wherein the first pigment is a self-dispersing pigment having an anionic group or a cationic group, the group being bonded directly or through an atomic group to a surface of the pigment, the second pigment is a pigment dispersible in an aqueous medium with the dispersant, and the dispersant is an ionic polymeric dispersant having a same polarity as that of the group bonded to the surface of the pigment or a nonionic polymeric dispersant.Type: GrantFiled: December 20, 1999Date of Patent: May 14, 2002Assignee: Canon Kabushiki KaishaInventors: Noribumi Koitabashi, Sadayuki Sugama, Yoshihisa Takizawa, Hitoshi Tsuboi
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Patent number: 6379442Abstract: A composition comprising: (a) a water-soluble magenta dye; and (b) a dye of the Formula (1) or a salt thereof: wherein R1, R2, R3 are defined in the description.Type: GrantFiled: April 6, 2000Date of Patent: April 30, 2002Assignee: Avecia LimitedInventors: Aidan Joseph Lavery, Bachaspati Roy, Janette Watkinson, Mark Kenworthy