Identified Reactant Isolating Material Or Capsule Wall Material Or Binder Resin Patents (Class 503/214)
  • Patent number: 10226956
    Abstract: An aqueous dispersion resin composition contains a first polymer produced by polymerizing a first monomer component containing (meth)acrylamide and a second polymer produced by polymerizing a second monomer component containing a carboxy group-containing vinyl monomer, wherein at least a portion of the carboxy group in the second polymer is neutralized.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: March 12, 2019
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Yoshifumi Iimuro, Toshihiro Yoshimura, Syouta Mizutani
  • Patent number: 8921265
    Abstract: A security document precursor including, in order: a) at least one transparent biaxially stretched polyester foil; b) one colorless color forming layer containing at least an infrared absorber, a colorless dye-precursor and a polymeric binder; and c) a polymeric support; wherein the polymeric binder is copolymer including at least 90 wt % of a chlorinated ethylene and 1 wt % to 10 wt % of vinyl acetate both based on the total weight of the binder. Methods for making the security document precursor are also disclosed.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: December 30, 2014
    Assignee: Agfa-Gevaert N.V.
    Inventors: Hubertus Van Aert, Ingrid Geuens, Paul Callant, Bart Waumans
  • Patent number: 8921266
    Abstract: A method for preparing a color laser marked article comprising the steps of: a) infrared laser marking a security element including a polymeric support and a color forming layer comprising a color forming compound, an infrared dye and a polymeric binder comprising vinyl acetate and at least 85 wt % of vinyl chloride based on the total weight of the binder; and b) exposing the laser marked security element with light having a wavelength higher than 440 nm. The light exposure of step b) hinders the falsification of an issued security document without significant increase of background density.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: December 30, 2014
    Assignee: Agfa-Gevaert N.V.
    Inventors: Bart Waumans, Paul Callant
  • Publication number: 20140371064
    Abstract: Disclosed and claimed herein is a thermosensitive recording medium, having a base sheet; a binder; and a thermosensitive material on at least one surface of the base sheet comprising: one or more oxidizing agents; and a dye precursor.
    Type: Application
    Filed: June 18, 2013
    Publication date: December 18, 2014
    Inventor: John C. Warner
  • Patent number: 8889590
    Abstract: An irreversible thermochromic ink composition can include thermochromic pigment capsules dispersed in a carrier. The irreversible thermochromic pigment capsules can include an inner core having a color changing dye, a color activator for activating the color changing dye, and a wax, an outer core surrounding the inner core and comprising a color destroying agent, and a shell surrounding the outer core. Alternatively, the irreversible thermochromic pigment capsules can include an inner core having a color destroying agent and a wax, an outer core surrounding the inner core and comprising a color changing dye and a color activator for activating the color changing dye, and a shell surrounding the outer core. Written marks made with the irreversible thermochromic inks can be rendered a different color or substantially colorless by application of a sufficient amount of heat to melt or substantially liquefy the wax in the irreversible thermochromic pigment capsules.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: November 18, 2014
    Assignee: Sanford, L.P.
    Inventor: Wing Sum Vincent Kwan
  • Patent number: 8859460
    Abstract: A heat-sensitive recording material includes at least a paper substrate, a heat-sensitive recording layer arranged on the front side of the substrate and which has at least one dye precursor and at least one color acceptor, wherein dye precursor and color acceptor react with one another under the action of heat to form color, and an authenticating security feature. The authenticating security feature is a mark which is applied to the back side of the paper substrate and which is made of a tincture having at least one organic solvent. A barrier coating is arranged between the substrate and heat-sensitive recording layer and is suitable to protect the heat-sensitive recording layer against penetration of the tincture into the heat-sensitive recording layer from the back side.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: October 14, 2014
    Assignee: Mitsubishi HiTec Paper Europe GmbH
    Inventors: Ulf Behrens, Gerhard Stork, Svenja Eisernitz, Matthias Marx
  • Patent number: 8859288
    Abstract: Methods to produce pH-sensitive microparticles that have an active agent dispersed in a polymer matrix have certain advantages over microcapsules with an active agent encapsulated in an interior compartment/core inside of a polymer wall. The current invention relates to pH-sensitive microparticles that have a corrosion-detecting or corrosion-inhibiting active agent or active agents dispersed within a polymer matrix of the microparticles. The pH-sensitive microparticles can be used in various coating compositions on metal objects for corrosion detecting and/or inhibiting.
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: October 14, 2014
    Assignee: The United States of America as Represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Wenyan Li, Jerry W. Buhrow, Scott T. Jolley, Luz M. Calle
  • Publication number: 20140235437
    Abstract: A color acceptor for chemical reaction with a dye precursor to form a visually recognizable color. The color acceptor is constructed of lactic acid monomers. Also disclosed is a heat-sensitive recording material with a substrate and a heat-sensitive recording layer, wherein the heat-sensitive recording layer contains at least one dye precursor and at least one color acceptor which react with one another in a color-forming manner when heat is applied, and wherein the color acceptor is constructed of lactic acid monomers.
    Type: Application
    Filed: November 8, 2012
    Publication date: August 21, 2014
    Inventor: Matthias Neukirch
  • Patent number: 8709973
    Abstract: Disclosed herein are irreversible thermochromic ink compositions including a volatile color activator and a color change dye capable of becoming substantially colorless upon evaporation of the volatile color activator. The volatile color activator and the color change dye can be, optionally, encapsulated. Written marks made with the thermochromic ink compositions can be subjected to a force directing component, which can include generating heat and/or friction, to evaporate the volatile color activator, thereby causing the color change dye to become substantially colorless.
    Type: Grant
    Filed: December 31, 2011
    Date of Patent: April 29, 2014
    Assignee: Sanford, L.P.
    Inventor: Wing Sum Vincent Kwan
  • Patent number: 8664156
    Abstract: An irreversible thermochromic ink composition can include thermochromic pigment capsules dispersed in a carrier. The irreversible thermochromic pigment capsules can include an inner core having a color changing dye, a color activator for activating the color changing dye, and a wax, an outer core surrounding the inner core and comprising a color destroying agent, and a shell surrounding the outer core. Alternatively, the irreversible thermochromic pigment capsules can include an inner core having a color destroying agent and a wax, an outer core surrounding the inner core and comprising a color changing dye and a color activator for activating the color changing dye, and a shell surrounding the outer core. Written marks made with the irreversible thermochromic inks can be rendered a different color or substantially colorless by application of a sufficient amount of heat to melt or substantially liquefy the wax in the irreversible thermochromic pigment capsules.
    Type: Grant
    Filed: December 31, 2011
    Date of Patent: March 4, 2014
    Assignee: Sanford, L.P.
    Inventor: Wing Sum V. Kwan
  • Patent number: 8652996
    Abstract: Disclosed herein are irreversible thermochromic ink compositions including a solvent and a sublimable dye dissolved in the solvent. The solvent and the sublimable dye can be, optionally, encapsulated. Written marks made with the thermochromic ink compositions can be subjected to a force directing component and/or a heat source, to promote sublimation of the sublimable dye, thereby causing the written mark to change color or become substantially colorless.
    Type: Grant
    Filed: December 31, 2011
    Date of Patent: February 18, 2014
    Assignee: Sanford, L.P.
    Inventor: Wing Sum Vincent Kwan
  • Patent number: 8629082
    Abstract: The present invention provides a heat-sensitive recording material that suffers no defective coating and is superior in color-exhibiting sensitivity, image quality, and chemical resistance. The heat-sensitive recording material successively comprising, on a support, an undercoat layer, a heat-sensitive recording layer containing a leuco dye and a developer, and a protective layer, wherein the heat-sensitive recording layer contains, as a main pigment, kaolin having an average particle diameter of 0.1 to 0.4 ?m measured by a sedimentation method in an amount of 4 to 60 mass % based on a total solids content of the heat-sensitive recording layer, and wherein the heat-sensitive recording layer and the protective layer are formed by applying a heat-sensitive recording layer coating composition and a protective layer coating composition by a simultaneous multilayer curtain coating method, and drying resulting coatings.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: January 14, 2014
    Assignee: OJI Holdings Corporation
    Inventors: Shin-ichi Doi, Masahiro Morie, Kenji Muto, Toshizo Yamamoto
  • Patent number: 8603943
    Abstract: A proposed heat-sensitive recording material comprises a substrate, a heat-sensitive recording layer containing color formers and color acceptors, and a protective layer covering this heat-sensitive recording layer. The heat-sensitive recording layer has, as color acceptor, at least 66? percent by weight of 4,4?-dihydroxydiphenyl sulfone based on the total percentage of color acceptors in the heat-sensitive recording layer, and the protective layer has, as binder, at least 60 percent by weight of diacetone-modified polyvinyl alcohol based on the total percentage of binder in the protective layer.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: December 10, 2013
    Assignee: Mitsubishi HiTec Paper Europe GmbH
    Inventors: Gerhard Stork, Annette Schreiber, Diana Valentina Becerra Siabato
  • Patent number: 8598075
    Abstract: Provided is a thermal recording material comprising a heat-sensitive recording layer for color formation by heat and a protective layer stacked in this order on a support, the heat-sensitive recording layer containing an ethylene-vinyl alcohol copolymer, the protective layer containing a diacetone-modified polyvinyl alcohol and a crosslinker.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: December 3, 2013
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Takahito Ochiai, Takao Masuda
  • Patent number: 8592342
    Abstract: A thermal paper is described for the formation of images in thermal printing equipment and their manufacturing process, using high smoothness paper as a base or substrate. The thermal paper object of this invention is more economical and has a fully-acceptable performance. The high smoothness non-coated base paper has a greater high smoothness superficial finish than uncoated paper, and this development had not previously been used industrially for this purpose, since on trying to use the state of art of the process coupled with uncoated paper characteristics, the result was a low quality product. Hence, until now base papers had to be used with a previous coating the preparation of which increased production costs due to finished product characteristics, such as heavier weight (weight by square meter) and also a higher caliber.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: November 26, 2013
    Inventors: Ricardo Millares Neyra, Ricardo Millares Sotres, Dalila Rivera Carmona
  • Patent number: 8506695
    Abstract: Coating compositions and industrial packages including the coating compositions are disclosed.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: August 13, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Molly L. Hladik, Mehrgan Khavari, Cari L. Dorsh
  • Patent number: 8466085
    Abstract: The present invention provides a thermosensitive recording medium, which has a satisfactory color developing sensitivity, an excellent general printability (surface strength) and an excellent anti-sticking property. The thermosensitive recording layer of the thermosensitive recording medium of the present invention contains an alkylketene dimer. Without forming a protecting layer, the thermosensitive recording medium of the present invention is superior in color developing sensitivity, general printability (surface strength) and anti-sticking property.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: June 18, 2013
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Aya Kato, Tatsuyuki Kurihara, Tatsuo Nagai, Yoshimi Midorikawa, Kenji Hirai, Akihito Ogino
  • Publication number: 20130123101
    Abstract: A heat-sensitive recording material includes at least a paper substrate, a heat-sensitive recording layer arranged on the front side of the substrate and which has at least one dye precursor and at least one color acceptor, wherein dye precursor and color acceptor react with one another under the action of heat to form color, and an authenticating security feature. The authenticating security feature is a mark which is applied to the back side of the paper substrate and which is made of a tincture having at least one organic solvent. A barrier coating is arranged between the substrate and heat-sensitive recording layer and is suitable to protect the heat-sensitive recording layer against penetration of the tincture into the heat-sensitive recording layer from the back side.
    Type: Application
    Filed: November 30, 2010
    Publication date: May 16, 2013
    Applicant: Mitsubishi HiTec Paper Europe GmbH
    Inventors: Ulf Behrens, Gerhard Stork, Svenja Eisernitz, Matthias Marx
  • Publication number: 20120100988
    Abstract: A note pad includes: a stack of carbonless note sheets each of which includes: a substrate; and a color-developing coating layer formed on an upper surface of the substrate, and including a plurality of microcapsules and a carbonless color-developing material, each of the microcapsules encapsulating a reactive dye and being breakable, when subjected to a pressure, to release the reactive dye to react with the carbonless color-developing material for color development.
    Type: Application
    Filed: March 1, 2011
    Publication date: April 26, 2012
    Applicant: TAIWAN HOPAX CHEMICALS MFG. CO., LTD.
    Inventors: Tsung-Tien KUO, Jen-Rong LIU, Hsien-Min KUO, Tsun-Rung HSU
  • Patent number: 8101546
    Abstract: In the present invention, a dispersion that has excellent dispersion efficiency, shows hardly any premature graying, and exhibits excellent dispersion stability and storage stability when heated is prepared, and the thermal recording material excellent in color developing sensitivity and whiteness of the background is provided. The present invention provides a thermal recording material including a support and a thermosensitive coloring layer that is provided on the support and contains an electron-donating colorless dye and an electron-accepting compound, wherein the thermosensitive coloring layer contains a polyvinyl alcohol-based resin (A) containing a carboxyl group that has been produced by saponification of polyvinyl ester obtained by the polymerization in the presence of aldehydes or ketones and that has an absorbance at 280 nm of 0.20 to 0.85 obtained from an ultraviolet absorption spectrum of a 0.1 wt % aqueous solution thereof.
    Type: Grant
    Filed: May 29, 2006
    Date of Patent: January 24, 2012
    Assignee: Kuraray Co., Ltd.
    Inventor: Atsushi Jikihara
  • Patent number: 8088712
    Abstract: The present invention provides a reversible thermosensitive recording medium including: a support, and a reversible thermosensitive recording layer laid on the support, the recording layer containing a reversible thermosensitive composition, wherein the reversible thermosensitive composition forms a relatively color-developed state and a colorless state depending on a difference in a heating temperature and/or a cooling rate after heating by the use of an electron-donating color-forming compound and an electron-accepting compound; a resin component contained in the reversible thermosensitive recording layer is a resin in which a polyol resin having a hydroxyl value within the range of 100 KOHmg/g to 250 KOHmg/g is crosslinked; and as the electron-accepting compound, a urea compound represented by the following General Formula (1) is used, where “n” is an integer of 23 or greater.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: January 3, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Hitoshi Shimbo, Kunio Hayakawa, Jun Maruyama
  • Patent number: 7989389
    Abstract: The present invention provides a heat-sensitive recording material having a support, a heat-sensitive color-developing layer containing a leuco dye and a developer, and a protective layer, the heat-sensitive color-developing layer and the protective layer being formed on the support, wherein carboxylic-acid-modified polyvinyl alcohol with a weight average degree of polymerization of 100 to 400 and a modification degree of 0.2 mol % to 1.0 mol % is used as a dispersing agent for dispersing the leuco dye.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: August 2, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Kunihiko Hada, Yoshikazu Kaneko, Michiyo Fukushima, Kazuyuki Uetake
  • Patent number: 7846870
    Abstract: A heat-sensitive recording material comprising a substrate and a heat-sensitive recording layer, the heat-sensitive recording layer containing a leuco dye, a developer, and a copolymer resin emulsion, the copolymer resin emulsion comprising a copolymer resin, the copolymer resin (1) containing (i) (meth)acrylonitrile, and (ii) one or more vinyl monomers copolymerizable with (meth)acrylonitrile, and (2) having a solubility parameter of 12.0 or higher, above mentioned vinyl monomers (ii) include at least a carboxyl group-containing vinyl monomer, and said at least a carboxyl group-containing vinyl monomer is 1 to 10 mass % of the total mass of the copolymer resin.
    Type: Grant
    Filed: April 21, 2005
    Date of Patent: December 7, 2010
    Assignee: Oji Paper Co., Ltd.
    Inventors: Kazuo Watanabe, Keiichi Inubushi
  • Patent number: 7807076
    Abstract: An improved process for the preparation of microcapsules consisting essentially of a wall material and a core material in condensing a melamine-formaldehyde precondensate and/or methyl ethers thereof in an aqueous dispersion of a water-insoluble core material and in the presence of an acrylic acid/acrylamide copolymer at acidic pH and at a temperature in the range of from 20° to 100° C., and hardening thereafter the melamine-formaldehyde precondensate to form the walls of the microcapsules at an elevated temperature, wherein the core material is dispersed in the precondensate/copolymer solution without initial partial condensation of the precondensate and copolymer and wherein the hydrophobe point of the precondensate and/or its methyl esters is less than 90° C., as well as microcapsules, paper and pressure-sensitive recording material comprising such microcapsules.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: October 5, 2010
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Ann Hunt, Robert Montgomery O'Neil
  • Patent number: 7569515
    Abstract: An erasable image forming material includes a color former containing crystal violet lactone, a developer, a first binder resin of styrene-butadiene copolymer and a second binder resin of a styrene-based resin containing ?-methylstyrene, the first and second binder resins being in a compatible state.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: August 4, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Satoshi Takayama, Kenji Sano, Takeshi Gotanda, Yumiko Sekiguchi
  • Patent number: 7553796
    Abstract: The present invention provides a reversible thermosensitive recording medium including a support and a thermosensitive recording layer thereon, in which the thermosensitive recording layer contains an electron-donating coloring compound and an electron-accepting compound, and the thermosensitive recording layer is capable of forming a relatively developed condition and a relatively erased condition depending on at least one of the difference of heating temperatures and the difference of cooling rates following to heating, and in which the electron-accepting compound contains a phenol compound expressed by General Formula (1): where, in the General Formula (1), “l” represents an integer of 1 to 3 and “m” represents an integer of 23 or more.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: June 30, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Yamamoto, Kyoji Tsutsui, Hiromi Furuya, Kyohji Okada
  • Patent number: 7538070
    Abstract: A thermochromic reimageable recording medium comprises a substrate and thermochromic composition comprising a photochromic material, a transition metal salt and a binder. The thermochromic composition changes color from a colorless state to a colored state upon application of heat. The thermochromic recording medium may be used to display a viewable image by applying heat to selected areas of the medium to form a desired image. The colored state is changeable or erasable back to the colorless state by exposure to visible light.
    Type: Grant
    Filed: June 7, 2005
    Date of Patent: May 26, 2009
    Assignee: Xerox Corporation
    Inventors: Gabriel Iftime, Peter M. Kazmaier, Kyra Ramirez
  • Publication number: 20090029854
    Abstract: A reversible thermosensitive recording material including a support, a reversible thermosensitive recording layer, and a gas barrier layer, the reversible thermosensitive recording layer and gas barrier layer being laid over the support, wherein the reversible thermosensitive recording layer is formed of a reversible thermosensitive composition containing a mixture of an electron-accepting compound and an electron-donating color-forming compound whose color-developed state varies depending upon at least one of a heating temperature and a cooling rate after heating, and wherein the gas barrier layer contains an inorganic layered compound and a gas barrier resin which is at least one selected from the group consisting of polyvinyl alcohol polymers and ethylene-vinyl alcohol copolymers.
    Type: Application
    Filed: July 23, 2008
    Publication date: January 29, 2009
    Applicant: RICOH COMPANY, LTD.
    Inventors: Jun Maruyama, Satoshi Arai
  • Patent number: 7378373
    Abstract: An erasable image forming material includes a color former, a developer, a binder resin and 0.5 wt % or less of a plasticizer. The erasable image forming material exhibits improved erasure performance.
    Type: Grant
    Filed: September 18, 2006
    Date of Patent: May 27, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeshi Gotanda, Satoshi Takayama, Kenji Sano, Yumiko Sekiguchi
  • Patent number: 7354884
    Abstract: Disclosed is a heat-sensitive recording material comprising (a) a transparent film, (b) a heat-sensitive recording layer formed on one side of the transparent film, and containing an electron-donating compound, an electron-accepting compound, and a binder, (c) a protective layer formed on the heat-sensitive recording layer, and containing an aqueous resin as a primary component; and (d) a backside layer formed on the other side of the transparent film, and containing a pigment and a binder; the heat-sensitive recording material containing in the backside layer spherical resin particles having a mean volume particle diameter of 2 to 15 ?m in an amount of 0.2 to 5.0 mass % of the backside layer.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: April 8, 2008
    Assignee: OJI Paper Co., Ltd.
    Inventors: Toshiro Hada, Shigeji Matsuzawa, Masanao Tajiri, Ritsuo Mando
  • Patent number: 7354885
    Abstract: An erasable image forming material includes a color former containing crystal violet lactone, a developer, a first binder resin of styrene-butadiene copolymer and a second binder resin of a styrene-based resin containing a-methylstyrene, the first and second binder resins being in a compatible state.
    Type: Grant
    Filed: September 18, 2006
    Date of Patent: April 8, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Satoshi Takayama, Kenji Sano, Takeshi Gotanda, Yumiko Sekiguchi
  • Patent number: 7348296
    Abstract: A substantially light-insensitive monosheet thermographic recording material comprising a support and on one side of the support a thermosensitive element, the thermosensitive element comprising at least one substantially light-insensitive silver salt of a carboxylic acid, at least one reducing agent therefor in thermal working relationship therewith and at least one binder, the at least one binder comprising at least one first polymer consisting of vinyl aceto-acetal monomer units and optionally monomer units selected from the group consisting of vinyl alcohol, vinyl acetate and itaconic acid monomer units, wherein the weight ratio of the at least one binder to the light-insensitive silver salt(s) of a carboxylic acid in the thermosensitive element is greater than 1.6; and the at least one binder optionally contains less than 40% by weight of a second polymer consisting of vinyl butyral monomer units and optionally vinyl alcohol and/or vinyl acetate monomer units.
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: March 25, 2008
    Assignee: Agfa HealthCare
    Inventors: Carlo Uyttendaele, Ivan Hoogmartens, Huub Van Aert
  • Patent number: 7232791
    Abstract: In the multi colored thermally sensitive recording medium, at least one kind of dye precursor is contained in complex fine particles which contain dye precursor and polymer of multi valence isocyanate compound, further contain 4,4?-diisocyanate-3,3?-dimethyl-1,1?biphenyl and/or polymethylene.polyphenyl.polyisocyanate.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: June 19, 2007
    Assignee: Nippon Paper Industries, Co., Ltd.
    Inventors: Tatsuo Nagai, Kaoru Hamada, Tadakazu Fukuchi, Takashi Sasaki
  • Patent number: 7169542
    Abstract: A composition, method, and system for recording an image. The system includes a multiphase imaging material in which energy is absorbed by an antenna material. The absorbed energy causes the reaction of an activator and a color-forming material.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: January 30, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Vladek Kasperchik, Makarand Gore
  • Patent number: 7141360
    Abstract: Imaging layers, image recording media, and methods of preparation of each, are provided. One exemplary embodiment of the imaging layer, among others, includes a matrix, a radiation absorbing compound dissolved in the matrix, at least two activators substantially dissolved in the matrix, and a color former. The activators can include a primary activator having a higher acidity than a secondary activator. In addition, the primary activator has a lower solubility in the matrix than the secondary activator. The color former is substantially insoluble in the matrix at ambient conditions and is substantially uniformly distributed in the matrix.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: November 28, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Vladek Kasperchik, Jayprakash C. Bhatt, Cari L Dorsh
  • Patent number: 7122503
    Abstract: The present invention teaches an improved process for preparing a population of microcapsules having a substantially uniform size distribution, especially useful for manufacture of carbonless paper. The improved process teaches use of membrane material having a pre-selected pore size in the capsule manufacture process. A core material is provided along with a receiving solution for receiving the core material. The receiving solution is a nonsolvent for the core material. The core material is passed under pressure through the membrane into a moving or turbulent receiving solution forming uniform droplets of core material dispersed in the receiving solution. Wall-forming material is added to the receiving solution for coating the core material droplets. The coating on the droplets is polymerized forming microcapsules. This novel process also lends itself to microcapsule formation in a continuous process.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: October 17, 2006
    Assignee: Appleton Papers Inc.
    Inventors: Troy Ronald Seehafer, George Arthur Stahler
  • Patent number: 7081435
    Abstract: The present invention is the thermally sensitive recording medium comprising a thermally sensitive color developing layer containing colorless or pale colored basic leuco dye and a color developing agent as a main components on a substrate, wherein said thermally sensitive recording layer contains acrylic emulsion and colloidal silica, further contains at least one kind of diphenylsulfone bridgeable compound represented by general formula A as the color developing agent, wherein, X and Y can be different or same and indicates a saturated or an unsaturated liner or grafted hydrocarbon group of carbon number 1–12 which can possess an ether bond, or indicate, wherein, R indicates a methylene group or an ethylene group, T indicates a hydrogen atom or an alkyl group of carbon number 1–4, and R1–R6 independently indicate a halogen-atom, an alkyl group of carbon number 1–6, or an alkenyl group, further, m, n, p, q, r, t indicate an integer number of 0–4 and when are bigger than 2, R1–R6 can be different, an
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: July 25, 2006
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Takanori Otsuhata, Tadakazu Fukuchi
  • Patent number: 7049268
    Abstract: A heat reversible recording medium includes a heat sensitive layer which comprises a resin and an organic low molecular compound, and has a transparency which is reversibly variable depending on a temperature. The heat sensitive layer has a glass transition temperature change of ?10° C. to 5° C., and a transparency temperature width of 30° C. or more.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: May 23, 2006
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshiko Sakata, Yoshihiko Hotta, Hiroki Kuboyama
  • Patent number: 7049269
    Abstract: The present invention provides a thermal recording material comprising a plurality of layers including at least a thermal recording layer on a support that is characterized in that an intermediate layer composed of gelatin as a binder is provided between at least one pair of two adjacent layers of the plurality of layers. Further, the steps for forming the thermal recording material by coating and drying the respective coating liquids for forming each layer that are characterized in that the drying process of the intermediate layer is performed while controlling wet membrane surface temperature at no higher than 35° C.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: May 23, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Toshio Hara
  • Patent number: 6908505
    Abstract: Thermochromic compositions that include combinations of at least one color former and at least one Lewis acid in a polymer mixture are disclosed. The thermochromic compositions reversibly change appearance from substantially transparent to substantially non-transparent above a lower critical solution temperature.
    Type: Grant
    Filed: October 1, 2003
    Date of Patent: June 21, 2005
    Assignee: Spectra Systems Corporation
    Inventors: Nabil M. Lawandy, Timothy J. Driscoll, Charles M. Zepp
  • Patent number: 6858565
    Abstract: Disclosed is a thermosensitive recording material comprising a sheet-shaped support and a thermosensitive recording layer which is formed on at least one surface of the support and comprises a colorless or light-colored dye precursor and a color developer capable of reacting with the dye precursor and inducing color formation therein upon application of heat thereto, the color developer comprising a compound represented by the following formula (I) or analog thereof: The thermosensitive recording material has high sensitivity and can prevent white background portions from coloring and recorded images from decolorizing in an environmental resistance test.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: February 22, 2005
    Assignee: Oji Paper Co., Ltd.
    Inventors: Hirotake Fujita, Jun-Ya Kojima, Ayako Shirai, Yoshiyuki Takahashi
  • Patent number: 6852671
    Abstract: A heat-sensitive recording material including, on a support, a heat-sensitive color-developable layer containing an electron-donating colorless dye and an electron-accepting compound, wherein the electron-accepting compound contains a compound represented by R1—Ph—SO2R2, and an adhesive strength when an adhesive sheet such as a revenue stamp is affixed to a recording face of a heat-sensitive recording paper made of the heat-sensitive recording material is larger than a given value, and a center line average roughness Ra75 of the heat-sensitive recording face is 2.0 ?m or less.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: February 8, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masayuki Iwasaki, Tsutomu Watanabe, Hirofumi Mitsuo
  • Patent number: 6790809
    Abstract: A heat-responsive-discoloring coloring composition, which is colored at a temperature lower than its discoloration initiation temperature (T) of 60° C. to 200° C.; which is substantially discolored at a temperature equal to or higher than the discoloration initiation temperature (T); and which does not recover its color once discolored, even when its temperature is lowered to a temperature lower than the discoloration initiation temperature (T) again, the heat-responsive-discoloring coloring composition comprising a polymer having a glass transition temperature (Tg) of 60° C. to 200° C.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: September 14, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Keiichi Suzuki
  • Publication number: 20040101789
    Abstract: A reversible multicolor recording medium includes a supporting substrate and a recording layer including reversible thermal coloring compositions having different colors on the supporting substrate. The reversible thermal coloring compositions are included within a separated and independent minute gap structure, and respectively have light-to-heat transforming materials which respectively absorb infrared rays having different wavelength ranges to generate heat.
    Type: Application
    Filed: August 7, 2003
    Publication date: May 27, 2004
    Inventors: Kenichi Kurihara, Noriyuki Kishii, Hisanori Tsuboi
  • Patent number: 6669765
    Abstract: A thermochromic dry offset ink comprising a dry offset ink medium and a thermochromic pigment material dispersed therein, wherein the thermochromic pigment material is a pigment material which has a microcapsular form having non-round particle cross section and has a thermochromic material enclosed in the microcapsules. Also disclosed is a printed article produced using the ink. The thermochromic dry offset ink can more improve pressure resistance and heat resistance and also can more satisfy uniform printability and high-speed continuous printability in offset printing especially on articles such as containers.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: December 30, 2003
    Assignee: The Pilot Ink Co., Ltd.
    Inventors: Kuniyuki Senga, Masahiro Ito
  • Patent number: 6645910
    Abstract: The present invention provides a thermally sensitive recording medium that possesses a thermally sensitive color developing layer containing colorless or pale colored basic leuco dye and an organic color developer as main components on a substrate, wherein said thermally sensitive recording medium contains at least one kind of an ultraviolet ray absorbent of aqueous emulsion type polymer composed of an emulsion copolymerized compound of (a) ultraviolet ray absorbing monomer, (b) vinyl compound monomer that can copolymerize with said monomer, (c) hydrophilic monomer and (d) reactive emulsifier.
    Type: Grant
    Filed: June 6, 2000
    Date of Patent: November 11, 2003
    Assignees: Nippon Paper Industries Co. Ltd., Ipposha Oil Industries Co. Ltd.
    Inventors: Reiko Sato, Kaoru Hamada, Yoshihide Kimura, Takaichi Yamamoto, Hiroyuki Kawabata, Seiji Sugimori
  • Publication number: 20030203817
    Abstract: A high-molecular weight gel having a leuco dye represented by the formula (L-1) as defined herein, connected thereto by covalent bond or single bond, and a high-molecular weight gel represented by the formula (R-1) as defined herein.
    Type: Application
    Filed: March 19, 2003
    Publication date: October 30, 2003
    Applicant: Fuji Photo Film Co., Ltd.
    Inventors: Takashi Katoh, Akinori Fujita
  • Patent number: 6623852
    Abstract: A heat-sensitive recording material, comprising a layer support, on whose front face a heat-sensitive recording layer is arranged, containing a colorant precursor and a colorant acceptor which undergoes a colorant formation reaction when it comes into contact with the colorant precursor, an intermediate layer arranged between the layer support and heat-sensitive recording layer, a protective layer that is free from compounds containing silicone, is hardened by actinic radiation and covers the heat-sensitive recording layer and a self-adhesive layer arranged on the back of the layer support, is used as a label material which can be wound on a roll and printed by the offset or flexographic printing process and in which the self-adhesive layer is in contact with the protective layer in the roll.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: September 23, 2003
    Assignee: Mitsubishi HiTec Paper Flensburg GmbH
    Inventors: Wolfgang Wagner, Jutta Berndt, Bernd Gerecht
  • Publication number: 20020121218
    Abstract: A thermochromic dry offset ink comprising a dry offset ink medium and a thermochromic pigment material dispersed therein, wherein the thermochromic pigment material is a pigment material which has a microcapsular form having non-round particle cross section and has a thermochromic material enclosed in the microcapsules. Also disclosed is a printed article produced using the ink.
    Type: Application
    Filed: March 5, 2001
    Publication date: September 5, 2002
    Inventors: Kuniyuki Senga, Masahiro Ito
  • Patent number: 6432874
    Abstract: A thermally sensitive recording paper having a recording surface which when a postage stamp or a revenue stamp is adhered to the recording surface requires at least ten cycles of a removal test procedure to remove at least one third of the adhered surface of the stamp from the recording surface of the thermally sensitive recording paper, wherein the removal test procedure comprises adhering the postage stamp or revenue stamp to the recording surface of the thermally sensitive recording paper, hanging the recording paper over an iron bar of about 8 mm diameter with the postage stamp or revenue stamp on an outer surface of the recording paper, adjusting the recording paper such that equal lengths are on either side of the iron bar, attaching to one end of the thermally sensitive recording paper a weight of about 500 g, holding the other end of the thermally sensitive recording paper by hand and carrying out a pull down ant put back cycle motion of the hand to move the postage stamp or revenue stamp over the iro
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: August 13, 2002
    Assignee: Nippon Paper Industries Co, Ltd
    Inventors: Tadakazu Fukuchi, Kaoru Hamada, Kunio Takebayashi, Hidenori Ogawa, Yoshimi Midorikawa, Reiko Sato, Yoshihide Kimura