The Pigment Is Inorganic Patents (Class 106/31.9)
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Publication number: 20030089271Abstract: The main object is to provide a water-based ink composition which is not only superior in hiding power but also has satisfactory writing properties. This invention relates to a water-based ink composition comprising a powder consisting of inorganic particles comprising at least one of aluminum oxide, titanium dioxide and boron nitride and water.Type: ApplicationFiled: September 5, 2001Publication date: May 15, 2003Inventors: Norihiro Hirano, Norimasa Kurihara, Atsushi Sudo, Yasuyuki Yoshimura
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Patent number: 6551394Abstract: A recording liquid characterized in that when it is printed with 100% duty and with a resolution of 600×300 dpi on an electrophotographic paper having a S.A.D (Surface Area Difference) of from 6.0 to 9.0 and a pH of from 6 to 8, the S.A.D. of the printed portion is at least 59.5.Type: GrantFiled: March 13, 2002Date of Patent: April 22, 2003Assignee: Mitsubishi Chemical CorporationInventors: Takashi Hirasa, Ken-ichiro Sasaki, Tetsuo Murayama
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Patent number: 6547870Abstract: The invention relates to a non-dusting, homogeneous pigment preparation, comprising ≧40% by weight of one or more effect pigments, 0.5-60% by weight of a polyalkylene glycol and/or one or more polyalkylene glycol derivatives, 0-10% by weight of a redispersing auxiliary, 0-40% by weight of water or an organic solvent or solvent mixture, 0-40% by weight of at least one further hydroxyl-rich resin, and to its use as a precursor for printing inks.Type: GrantFiled: December 13, 2000Date of Patent: April 15, 2003Assignee: Merck Patent Gesellschaft mit beschränkter HaftungInventors: Carsten Griessmann, Gerhard Herget
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Patent number: 6544327Abstract: The invention relates to a non-dusting homogeneous pigment preparation which is notable in that it comprises at least 40% by weight of one or more effect pigments, from 0.5 to 60% by weight of an aldehyde resin and/or ketonic resin and from 0.1 to 10% by weight of a redispersant.Type: GrantFiled: September 14, 2000Date of Patent: April 8, 2003Assignee: Merck Patent GmbHInventors: Carsten Griessmann, Wolfgang Hechler, Gerhard Herget
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Publication number: 20030056687Abstract: Disclosed is a black ink set comprising a plurality of black ink compositions, wherein the plurality of black ink compositions each comprise carbon black, a magenta pigment, and a cyan pigment as colorants, and the plurality of black ink compositions are different from each other in content of carbon black, and the content of the magenta pigment and the content of the cyan pigment are such that all the plurality of black ink compositions have a chroma C* value of not more than 3. This ink set can realize black images possessing excellent gradation.Type: ApplicationFiled: June 6, 2002Publication date: March 27, 2003Applicant: SEIKO EPSON CORPORATIONInventor: Tsuyoshi Sano
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Patent number: 6530986Abstract: There is provided a pigmented aqueous ink set which comprises: (a) a cyan ink which comprises at least one pigment which is a phthalocyanine compound; (b) a magenta ink which comprises at least one pigment which is a quinacridone compound; (c) a yellow ink wherein the pigment is C.I. Pigment Yellow 155; (d) a green ink wherein the pigment is selected from the group consisting of C.I. Pigment Green 7, 36, and mixtures thereof; (e) an orange ink wherein the pigment is selected from the group consisting of C.I. Pigment Orange 34, 36, 43, 61, 64, 71, and mixtures thereof; together with optionally (f) a black ink which comprises a black pigment. Preferably there is also present at least one water soluble organic cosolvent. The pigmented ink set is suitable for use in ink jet printing.Type: GrantFiled: September 27, 2001Date of Patent: March 11, 2003Assignee: Ilford Imaging UK LimitedInventors: Nicholas Alexander Walker, Peter Edward Rose
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Publication number: 20030041776Abstract: An erasable, shear-thinning writing composition includes a shear-thinning additive and graphite particles dispersed within an aqueous solvent system.Type: ApplicationFiled: June 6, 2001Publication date: March 6, 2003Inventors: Jean L. Spencer, Pawel Czubarow
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Publication number: 20030041777Abstract: The inkjet ink contains at least one pigment and at least one compound having a mean particle size of greater than 50 nm from the group comprising pyrogenic silicic acid, hydrophobised pyrogenic silicic acid, pyrogenic mixed oxides or pyrogenic aluminium oxides.Type: ApplicationFiled: April 5, 2002Publication date: March 6, 2003Inventors: Alfons Karl, Gerd Tauber, Werner Kalbitz, Horst Kleinhenz, Ralph McIntosh, Stephan Ludtke
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Patent number: 6524383Abstract: Disclosed is a pigment dispersion that can be used for an ink jet printing-use pigment ink that affords stable printing characteristics and has excellent storage stability in an ink jet printer having a head driven at a high frequency and having finer nozzles in order to enhance image quality and raise the speed. Disclosed is also a method for manufacturing this pigment dispersion. This manufacturing method includes a step of surface-treating a self-dispersing type of pigment, in which at least hydrophilic, dispersibility-imparting group is introduced to the pigment surface directly and/or via a polyvalent group, and a step of dispersing the self-dispersing pigment obtained in said surface-treating step in an aqueous medium, wherein the dispersion step is a step in which at least the self-dispersing pigment, a wetting agent, and water are dispersed in the form of a liquid mixture.Type: GrantFiled: October 19, 2001Date of Patent: February 25, 2003Assignee: Seiko Epson CorporationInventors: Hidehiko Komatsu, Hiroto Nakamura, Hitoshi Ohta, Masahiro Yatake, Kazuhiko Hara
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Publication number: 20030033959Abstract: Provided is an oil based ink for a ball-point pen comprising at least an alcohol-soluble dye, carbon black, a resin and an organic solvent, wherein the carbon black described above has a DBP oil absorption of 80 cc/100 g or less. The carbon black has preferably a particle diameter of 30 m&mgr; or less and a content of 1 to 15 mass % based on the total amount of the ink.Type: ApplicationFiled: September 6, 2002Publication date: February 20, 2003Inventors: Masaaki Morita, Susumu Suzuki, Toshiaki Takayanagi, Kyoko Kobayashi
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Patent number: 6521038Abstract: A near-infrared reflecting composite pigment comprises a near-infrared non-absorbing colorant and a white pigment coated with the near-infrared non-absorbing pigment. The near-infrared reflecting composite pigment can be produced by mixing a colorant dispersion, in which the near-infrared non-absorbing colorant is dispersed in a liquid medium, with the white pigment in a form selected from powder or a dispersion and then drying the resultant mixture. A near-infrared reflecting coating agent comprises as a coloring agent the near-infrared reflecting composite pigment. A near-infrared reflecting material comprises a base material coated on a surface thereof with the near-infrared reflecting coating agent.Type: GrantFiled: November 28, 2001Date of Patent: February 18, 2003Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Hiromitsu Yanagimoto, Yoshiyuki Zama, Hisao Okamoto, Tohru Hosoda, Yoshio Abe, Michiei Nakamura
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Publication number: 20030027911Abstract: One aspect of the invention relates to a brown pigment composition with excellent weathering resistance containing iron oxide, chromium oxide, and one or more alumina and/or silica components. Another aspect of the invention relates to a method of making a brown pigment involving combining iron oxide, chromium oxide, and one or more alumina and/or silica components to form a mixture and heating the mixture to provide brown pigment particles. Yet another aspect of the invention relates to a plastic composition containing a major amount of a plastic material and a minor amount of a brown pigment composition containing iron oxide, chromium oxide, and one or more alumina and/or silica components.Type: ApplicationFiled: July 17, 2001Publication date: February 6, 2003Inventors: William Gerald Loucka, Mark Edward Gall, John Gilbert Richardson
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Patent number: 6514328Abstract: A marking ink composition contains a dye, a pigment, a dispersion medium X in which the dye is practically soluble, and a dispersion medium Y in which the dye is practically insoluble, the dispersion media X and Y being mutually immiscible. A display medium includes a marking ink composition, and two plates for holding the marking ink composition therebetween, at least one of the plates having a transparent portion. A method for printing an image on an image receiving material includes the steps of depositing the above-mentioned marking ink composition on the image receiving material, and removing the dispersion medium X and the dispersion medium Y from the image receiving material. There is also described an image printed on an image receiving material by the above-mentioned printing method.Type: GrantFiled: February 4, 2000Date of Patent: February 4, 2003Assignee: Ricoh Company, Ltd.Inventors: Ikuo Katoh, Hitoshi Kondoh, Kunio Hayakawa, Mitsunobu Morita, Kyohji Tsutsui, Takashi Okada
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Patent number: 6503311Abstract: Aqueous carbon black dispersions, wherein the carbon black dispersions contain no wetting agent and contain at least one ozone-oxidized carbon black. The dispersions are produced by dispersing ozone-oxidized carbon black and other constituents in water. The dispersions may be used for the production of inks, printing inks and water-based lacquer systems.Type: GrantFiled: November 6, 2000Date of Patent: January 7, 2003Assignee: Degussa AGInventors: Alfons Karl, Werner Kalbitz, Horst Kleinhenz, Gerd Tauber
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Publication number: 20020185033Abstract: The present invention describes a method of producing an image which is visually distinct from its reproductions. This method comprises the steps of formulating an ink composition comprising a liquid vehicle and at least one modified pigment having attached at least one organic group and applying this ink composition to a substrate. Methods of determining the authenticity of an image and of verifying the date of creation of an image is also described.Type: ApplicationFiled: May 9, 2001Publication date: December 12, 2002Inventor: Peter H. Shepard
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Aqueous pigment dispersion water-base ink composition and recording method using the ink composition
Patent number: 6488753Abstract: Disclosed are an aqueous pigment dispersion and an ink composition which can realize high print density. The aqueous pigment dispersion comprises at least water and a surface-modified carbon black, the surface-modified carbon black being dispersible and/or dissolvable in water without any dispersant and having a hydrophilic functional group content/specific surface area value of 5 to 30 &mgr;mol/m2.Type: GrantFiled: March 9, 2000Date of Patent: December 3, 2002Assignees: Seiko Epson Corporation, Orient Chemical Industries, Ltd.Inventors: Hiroshi Ito, Masayuki Momose, Hiroko Hayashi, Sohko Ito -
Publication number: 20020170462Abstract: Provided is an ink for writing instruments which contains an interference pigment as a colorant and is designed to change the color tone of a line drawn with the ink depending on the darkness of a writing surface. The ink for writing instruments therefore contains an interference pigment coated, on the surface of a flaky minute base material, with a metal oxide having a high refractive index.Type: ApplicationFiled: October 2, 2001Publication date: November 21, 2002Applicant: Zebra Co., Ltd.Inventor: Mayumi Terai
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Publication number: 20020157574Abstract: The present invention relates to a pigment preparation comprising BiOCl pigments, one or more luster pigments and spherical particles, and to the use thereof in printing inks, security printing inks, surface coatings, paints, plastics and in cosmetic formulations.Type: ApplicationFiled: April 29, 2002Publication date: October 31, 2002Applicant: Merck Patent GmbHInventors: Joachim Weitzel, Wolfgang Hechler
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Patent number: 6451100Abstract: Aqueous carbon black dispersions contain carbon black and cationic surfactants in addition to water. The aqueous carbon black dispersions are produced by dispersing the carbon black and other components in water with bead mills, ultrasonic mills or an Ultra Turrax mixer. The dispersions can be used to produce inks, lacquers and printing inks.Type: GrantFiled: July 21, 2000Date of Patent: September 17, 2002Assignee: Degussa-Huls AGInventors: Alfons Karl, Horst Kleinhenz, Werner Kalbitz, Johann Mathias, Gerd Tauber, Andreas Stübbe
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Publication number: 20020124769Abstract: A recording liquid characterized in that when it is printed with 100% duty and with a resolution of 600×300 dpi on an electrophotographic paper having a S.A.D (Surface Area Difference) of from 6.0 to 9.0 and a pH of from 6 to 8, the S.A.D. of the printed portion is at least 59.5.Type: ApplicationFiled: March 13, 2002Publication date: September 12, 2002Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Takashi Hirasa, Ken-ichiro Sasaki, Tetsuo Murayama
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Publication number: 20020124772Abstract: The present invention relates to coating compositions, preferably printing inks for security applications comprising at least one organic resin, at least one pigment and optionally at least one organic solvent. Said pigment comprises glass ceramic composite particles, containing at least one crystalline particle embedded in a glass matrix. Said glass ceramic particles have a particle size in the range of between 0.1 &mgr;m to 50 &mgr;m. Preferably active ions selected from the group of the rare-earth elements are incorporated into the crystalline phase of the composite to provide the glass ceramics with luminescent up- and down- converting characteristics. Glass ceramic luminescent have excellent physical and chemical stability. The glass matrix permits as well the stabilisation of the photophysically interesting halide host crystals which have low phonon energies. Such materials provide unusual excitation and emission properties.Type: ApplicationFiled: February 5, 2002Publication date: September 12, 2002Inventors: Philipp Egger, Edgar Muller
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Publication number: 20020113854Abstract: An ink jet printing method, comprising the steps of:Type: ApplicationFiled: December 20, 2000Publication date: August 22, 2002Applicant: Eastman Kodak CompanyInventors: David Erdtmann, Huijuan Chen, Hwei-Ling Yau
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Publication number: 20020112646Abstract: A beaded black containing at least one pelletizing additive and at least one synthetic oil. The beaded black can be produced in a pelletizing machine and used as a filler and/or pigment in rubber and plastic articles and as a pigment for the production of printing inks.Type: ApplicationFiled: December 14, 2001Publication date: August 22, 2002Inventors: Karin Otto, Heinz Zoch, Jan Kopietz
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Publication number: 20020096083Abstract: Pearlescent inks are provided. The inks are suitable for use in writing instruments, and include a dispersion of a pearlescent pigment in a solvent. Some inks are erasable and/or shear-thinning.Type: ApplicationFiled: July 3, 2001Publication date: July 25, 2002Inventors: Jean L. Spencer, Pawel Czubarow, Yoojeong Kim
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Patent number: 6419732Abstract: An aqueous pigment ink composition comprising an inorganic pigment and an organosilicon compound obtained by hydrolysis of (A) a hydrolyzable silane containing an amino group-bearing organic group or a partial hydrolyzate thereof and (B) a hydrolyzable silane or a partial hydrolyzate thereof is suited for inkjet recording, has storage stability and nozzle discharge stability, and forms printed images having rub-off resistance and water fastness.Type: GrantFiled: August 11, 2000Date of Patent: July 16, 2002Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kazuyuki Matsumura, Akira Yamamoto
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Patent number: 6416868Abstract: Alkaline earth-manganese oxides are used as pigments. The alkaline earth-manganese oxide pigments are preferably of the formula MexMnOy, where Me is at least one metal selected from Ca, Sr, Ba and Mg, x is from 0.01 to 99, and y is greater than or equal to x+1 and less than or equal to x+2. The pigments are useful as colorants, and also possess improved reflectance characteristics, particularly in the IR region, and may reduce IR-induced heat buildup. These colorants can be used to form colored objects, or coat objects when they are either added into or applied onto materials such as paints, inks, plastics, glasses, ceramics and the like. The patent also covers the production of these pigments.Type: GrantFiled: November 23, 1999Date of Patent: July 9, 2002Assignee: DMC2 Degussa Metals Catalysts Cerdec AGInventors: Robert Michael Sullivan, Terry James Detrie, Daniel Russell Swiler
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Patent number: 6399674Abstract: Disclosed herein is a set of water-based pigment inks for ink-jet, comprising a black pigment ink and other pigment inks different in hue from the black pigment ink, which the pigment inks each comprise water, a water-soluble organic solvent and an aqueous pigment dispersion, wherein respective polymeric dispersants used in the black pigment ink and the other pigment inks different in hue from the black pigment ink are different in polarity from each other.Type: GrantFiled: July 12, 1995Date of Patent: June 4, 2002Assignee: Canon Kabushiki KaishaInventors: Akio Kashiwazaki, Yuko Suga, Hiroyuki Ishinaga, Hiromichi Noguchi, Yutaka Kurabayashi, Aya Takaide, Kiyomitsu Kudo
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Publication number: 20020056399Abstract: The present invention relates to a pigment preparation comprising a mixture of coated and/or uncoated SiO2 flakes, one or more special-effect pigments, and a phosphate derivative, and to the use thereof, especially in printing inks.Type: ApplicationFiled: October 19, 2001Publication date: May 16, 2002Applicant: Merck Patent GmbHInventors: Sabine Schoen, Reiner Vogt, Norbert Schul, Karl Osterried, Gerhard Herget
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Patent number: 6383278Abstract: A recording liquid characterized in that when it is printed with 100% duty and with a resolution of 600×300 dpi on an electrophotographic paper having a S.A.D (Surface Area Difference) of from 6.0 to 9.0 and a pH of from 6 to 8, the S.A.D. of the printed portion is at least 59.5.Type: GrantFiled: August 31, 1999Date of Patent: May 7, 2002Assignee: Mitsubishi Chemical CorporationInventors: Takashi Hirasa, Ken-ichiro Sasaki, Tetsuo Murayama
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Patent number: 6379445Abstract: Paints and printing inks are disclosed which contain carbon black as the pigment. The dispersion and storage stability of printing inks and paints may be improved by using carbon blacks containing silicon. The rheological behavior of the paints is improved by silicon-doping of the carbon blacks used. Paints having a reduced solvent content are consequently obtainable.Type: GrantFiled: August 23, 2000Date of Patent: April 30, 2002Assignee: Degussa AGInventors: Karin Otto, Peter Stroh
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Publication number: 20020043175Abstract: There is provided a pigmented aqueous ink set which comprises:Type: ApplicationFiled: September 27, 2001Publication date: April 18, 2002Applicant: ILFORD IMAGING UK LIMITEDInventors: Nicholas Alexander Walker, Peter Edward Rose
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Patent number: 6368397Abstract: An ink for ink jet printing which contains as essential components pigment, water-soluble organic solvent, and water. The ink contains particles, after ink jetting, such that the number-average particle diameter is 10 to 150 nm and the number of particles larger than 0.5 &mgr;m is 6×104 to 6×105/&mgr;l and the number of particles larger than 5 &mgr;m is less than 50/&mgr;l. This ink may be used in combination with a second liquid which contains a water-soluble organic solvent having a solubility parameter of 9 to 11, and/or surfactant, and water. A method of ink jet printing uses the ink or a combination of the ink and the liquid. The ink possesses the characteristics of both optical density and storage stability. The liquid prevents the mixing of colors of adjacent printed images.Type: GrantFiled: November 23, 1999Date of Patent: April 9, 2002Assignee: Fuji Xerox Co., Ltd.Inventors: Nobuyuki Ichizawa, Toshitake Yui, Kyoko Horinouchi, Ken Hashimoto
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Publication number: 20020033116Abstract: Erasable inks are provided for use in a writing instruments. In one aspect, the inks include a solvent, and, dispersed in the solvent as a colorant, a pigment having a flake-like morphology, the ink being substantially free of other colorants.Type: ApplicationFiled: July 3, 2001Publication date: March 21, 2002Inventors: Jean L. Spencer, Pawel Czubarow
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Publication number: 20020017219Abstract: The present invention provides an ink composition for an ink jet recording process, which exhibits excellent print quality with good water fastness and light fastness and without flying in deflected directions from the ink head or nozzle fill-in even after a prolonged ink jet printing. The ink comprises (1) a carbon black, (2) an organic pigment, (3) a dispersant incorporated in an aqueous medium and (4) a saccharide.Type: ApplicationFiled: April 26, 2001Publication date: February 14, 2002Inventors: Hideo Yamazaki, Michinari Tsukahara, Hiroto Nakamura, Hidehiko Komatsu
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Patent number: 6332943Abstract: Pigment preparation for the ink-jet process which comprises A) at least one finely divided, organic or inorganic pigment, B) a dispersant based on arylsulfonic acid/formaldehyde condensation products or an alkoxylated phenols, and C) water, as essential constituents. It provides for prints of high light fastness, wash fastness and rub fastness.Type: GrantFiled: December 30, 1999Date of Patent: December 25, 2001Assignee: BASF AktiengesellschaftInventors: Manfred Herrmann, Günther König, Rüdiger Sens, Bernd Siegel, Karl Siemensmeyer
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Publication number: 20010038815Abstract: The invention concerns the use of a beta rare earth sulphide as coloring pigment and its method of preparation. A beta rare-earth sulphide is used, the rare earth being lanthanum, cerium, praseodymium, samarium or neodymium. The sulphide consists of whole crystallites forming medium-sized aggregates of not more than 1.5 &mgr;m. The method of preparation of this rare earth sulphide is characterized in that a rare earth compound is reacted with at least one sulphidizing gas selected among hydrogen sulphide or carbon sulphide. The pigment can be part of compositions of the following types: plastic, paint, surface coating, rubber, ceramic, glazing, paper, ink, cosmetic products, dyes, leather, laminated coating or other types of compositions with a base of at least one mineral binder or obtained therefrom.Type: ApplicationFiled: May 24, 2001Publication date: November 8, 2001Inventors: Sylvain Busnot, Pierre Macaudiere
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Patent number: 6287374Abstract: In the present invention, a pigment is irradiated with a microwave so as to improve a surface thereof. Further, letting A be an area of a portion having hydrophilic groups on a surface of the pigment and B be an area of the other portion thereon, which are respectively found by measuring infrared spectrometers of the pigment, a ratio (A/B) is not less than 4. Water base ink according to the present invention is obtained by dispersing such a pigment in an aqueous medium.Type: GrantFiled: September 9, 1999Date of Patent: September 11, 2001Assignees: Minolta Co., Ltd.Inventors: Shozo Yanagida, Yuji Wada, Miwa Saito, Takamasa Ueda, Izumi Osawa
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Patent number: 6277183Abstract: An ink composition is disclosed which comprises at least one ink vehicle, at least one colorant and at least one metal oxide. The colorant may be a dye or a pigment, or both, and the colorant is non-reactive with the metal oxide in the ink vehicle. Also disclosed are inkjet formulations using the above-described compositions and methods of improving such properties as optical density.Type: GrantFiled: October 4, 1999Date of Patent: August 21, 2001Assignee: Cabot CorporationInventors: Joseph E. Johnson, J. Christine Bedford, Ronald J. Gambale
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Patent number: 6261353Abstract: A recording material is disclosed, comprising a colorless or pale solution containing an electrolyte, a water-soluble organic solvent and water, and an ink containing a pigment, an anionic compound, a water-soluble organic solvent and water, wherein the number of particles of 0.5 &mgr;m or more present in 1 L of the recording material is 1×1011 or more, and the number of particles of 5 &mgr;m or more is 1×109 or more. Also disclosed is an image forming method using the recording material.Type: GrantFiled: May 27, 1999Date of Patent: July 17, 2001Assignee: Fuji Xerox Co., LTDInventors: Takatsugu Doi, Atsushi Suzuki, Kunichi Yamashita, Yoshiro Yamashita, Hiroshi Inoue, Ken Hashimoto
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Patent number: 6231987Abstract: A composition for transparent coloration of a glass surface. The composition has fine gold (Au) particles; fine silver (Ag) particles; a fixing agent including an organic Ti compound, an organic Fe compound, and an organic Si compound; a binder resin; and an organic solvent. The relationship between the amount of gold and silver particles to the fixing agent as a ratio of the number of metal atoms is as follows: (Au+Ag)/(Ti+Fe+Si)<½.Type: GrantFiled: October 14, 1998Date of Patent: May 15, 2001Assignee: Mitsuboshi Belting Ltd.Inventors: Yoshifumi Maeda, Kazuo Goto
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Patent number: 6203605Abstract: An ink jet ink composition comprises a liquid vehicle and a chemically modified pigment dispersion incorporating a chemical with a plurality of electron donating groups. The chemical is a monomer or a polymer. Dried ink film resistivity of aqueous carbon black pigment ink formulated in accordance with this composition is improved by being increased to a level whereby no electrical shorts which cause printer failure or print defects are observed during printing.Type: GrantFiled: March 20, 1998Date of Patent: March 20, 2001Assignee: Scitex Digital Printing, Inc.Inventors: Sharad R. Thakkar, Jing-Den Chen
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Patent number: 6190445Abstract: The present invention is directed to the development of a highly safe high-chroma orange pearl pigment replacing a cadmium pigment, in which a flaky substrate has surfaces coated with spherical metal oxide particles containing iron oxide, or spherical metal oxide particles obtained by adding thereto a specific proportion of one or more oxides selected from among aluminum, calcium and magnesium oxides, and a process for manufacturing the same, and uses thereof.Type: GrantFiled: November 19, 1998Date of Patent: February 20, 2001Assignee: Merck Patent GesellschaftInventor: Tamio Noguchi
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Patent number: 6187085Abstract: A printing ink composition is described which includes carbon black and an alkali metal hydroxide in combination with an alkenyl succinimide for the dispersion of the carbon black. Also disclosed is a method of preparing a carbon black printing ink composition which comprises dispersing the carbon black in a mineral oil in the presence of an alkali metal hydroxide and an alkenyl succinimide.Type: GrantFiled: July 26, 1999Date of Patent: February 13, 2001Assignee: Sun Chemical CorporationInventor: Olgierd Wasilewski
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Patent number: 6171382Abstract: Aqueous carbon black dispersions contain carbon black and surfactants, in addition to water. The dispersions are produced by dispersing the carbon black and the other constituents in water, using bead mills, ultrasonic mills and/or an ultra-turrax. The aqueous carbon black dispersions can be used to produce printing inks such as ink-jet inks or writing inks.Type: GrantFiled: June 4, 1999Date of Patent: January 9, 2001Assignee: Degussa-Huls AGInventors: Andreas St{umlaut over (u)}bbe, Horst Kleinhenz, J{umlaut over (u)}rgen Leimann, Alfons Karl