Identified Solvent Or Dispersant For Color-former, Other Than Mere Mineral Oil Patents (Class 503/213)
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Patent number: 5242885Abstract: An improved pressure sensitive recording sheet capable of causing an improved color development which comprises a substrate and a layer containing microcapsules each containing an electron-donative chromogenic material and a hydrophobic medium containing benzyl toluene being formed on the substrate.The pressure sensitive recording sheet exhibits an excellent color-developing property and provides clear color images of high density.Type: GrantFiled: May 5, 1992Date of Patent: September 7, 1993Assignee: Kanzaki Paper Manufacturing Co., Ltd.Inventors: Kazuyuki Shinmitsu, Masanao Tajiri, Shunsuke Shioi
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Patent number: 5215956Abstract: In the color changing print of this invention, plural areas are printed by using plural types of color changing inks which develop into different colors from the substantially invisible colorless state by reaction with a color changing agent. By the emergence of print from colorlessness and by giving changes in the appearing colors, unexpectedness and entertainingness are provided so that an attractive education may be realized.Type: GrantFiled: September 3, 1991Date of Patent: June 1, 1993Inventor: Kiyoharu Kawashima
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Patent number: 5214021Abstract: The present invention is connected with a pressure sensitive copy material using a color former solution in which an electron accepting developer and an electron donating color former capable of developing a color when brought into contact with the developer are dissolved in a solvent, and as the solvent in the color former solution, a solvent composition is used which comprises (a) 5 to 50% by volume of one selected from the group consisting of a hydrogenated lower polymer of propylene and/or a butene, an alicyclic hydrocarbon, an alkylbenzene and a kerosine fraction, and (b) 50 to 95% by volume of a bicyclic aromatic hydrocarbon and/or a chlorinated paraffin oil having a viscosity of 3 cSt or more at 40.degree. C., the aforesaid developer comprising an aromatic carboxylic acid, a polymer thereof, a metallic salt thereof, a polyvalent metallized carboxy-modified terpene phenolic resin or a derivative thereof.Type: GrantFiled: April 5, 1990Date of Patent: May 25, 1993Assignee: Nippon Petrochemicals Co., Ltd.Inventors: Naoya Takahashi, Satoshi Narui, Yasuo Togami, Ryoichi Miura
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Patent number: 5204185Abstract: A process for producing melamine-formaldehyde microcapsules using a reactive protective colloid is provided. The reactive protective colloid is prepared by reactively coupling a surface active polymer with a first melamine-formaldehyde pre-condensate. An aqueous solution which includes the reactive protective colloid and a second melamine-formaldehyde pre-condensate is then prepared. A substance to be encapsulated, preferably an oily solution containing a dyestuff precursor, is dispersed as droplets into the aqueous solution. The reactive protective colloid surrounds the droplets to form an emulsion. The second melamine-formaldehyde pre-condensate and the reactive protective colloid are made to self-condense to form melamine-formaldehyde microcapsule walls around the droplets of the substance to be encapsulated.Type: GrantFiled: December 11, 1990Date of Patent: April 20, 1993Assignee: The Standard Register CompanyInventor: Michael E. Seitz
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Patent number: 5204184Abstract: A process for the production of microcapsules containing a core material is provided and includes the steps of providing a polar solvent, and adding thereto a dispersion of a tertiary aliphatic isocyanate and a core material in an oleophilic liquid and an amine-containing composition having at least three primary amine groups to form a mixture. The mixture containing these components is reacted to form microcapsules containing the core material. The tertiary aliphatic isocyanate preferably comprises an adduct of m-tetramethylxylene diisocyanate and trimethylolpropane. The core material may contain a dyestuff precursor which is capable of reacting with a color developer to form a color. The microcapsules containing dyestuff precursor may be used to coat a support sheet to form carbonless copy paper.Type: GrantFiled: September 10, 1990Date of Patent: April 20, 1993Assignee: The Standard Register CompanyInventors: Richard L. Shields, Michael Seitz
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Patent number: 5178949Abstract: The present invention relates to a color-former having microcapsules which comprise an electron-donating colorless dye dispersed in a hydrophobic liquid. The present invention provides a color-former using both an electron-donating colorless dye and a hydrophobic liquid which previously were unable to be used because of the lack of solubility. A uniform and stable dispersion of electron-donating colorless dye in a hydrophobic core liquid is prepared by using oil-soluble non-ionic surfactant.Type: GrantFiled: May 21, 1991Date of Patent: January 12, 1993Assignee: Jujo Paper Co., Ltd.Inventors: Masahiro Sakamoto, Tsutomu Murano, Shozo Harada
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Patent number: 5169826Abstract: A CF ink and process which can be applied to a support sheet by standard transfer-litho press is provided. The nonvolatile printing ink which is capable of color development may be used to produce a CF carbonless copy sheet, or, in combination with a high solids, aqueous-based CB ink, to produce a CFB carbonless copy sheet. The ink includes from about 25 to 35% of a non-volatile oil, 25 to 35% of an acidic color developer, 20 to 50% filler, and 4 to 15% dispersed wax particles, all percentages by weight.Type: GrantFiled: October 26, 1990Date of Patent: December 8, 1992Assignee: The Standard Register CompanyInventors: Michael E. Seitz, Frank V. Parenti
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Patent number: 5132271Abstract: A high solids content, aqueous, microcapsule-containing printing ink is prepared by forming microcapsules in situ in a printing ink vehicle. The microcapsules are preferably prepared by interfacial polymerization or interfacial crosslinking between a reactant, such as a polyisocyanate dissolved in an oily solution and a coreactant such as a polysalt of casein and diethylene triamine present in an aqueous solution into which the oily solution is dispensed. The aqueous solution contains water and a non-volatile diluent such as a non-reducing sugar, for example methyl glucoside. The printing ink preferably has a 60-70% by weight solids content and may be used as a low-coat-weight CB coating for preparing carbonless copy paper.Type: GrantFiled: March 28, 1990Date of Patent: July 21, 1992Assignee: The Standard Register CompanyInventor: Michael E. A. Seitz
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Patent number: 5122498Abstract: A dye solvent useful as a material for microcapsules necessary for the manufacture of pressure-sensitive manifold paper. This solvent essentially consists of a hydroaromatic compound for pressure-sensitive manifold paper. The compound is a polycyclic aromatic compound with three or more aromatic rings, some of which rings have been hydrogenated and exhibits solvency, particularly, for a black pigment and a blue pigment of leuco dye.Type: GrantFiled: August 8, 1990Date of Patent: June 16, 1992Assignee: NKK CorporationInventors: Taisuke Nishida, Jun Miki, Tadao Kimura, Hiroaki Taniguchi
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Patent number: 5087283Abstract: Sympathetic ink compositions particularly adapted for use with high speed, non-impact ink printing equipment are disclosed, together with methods of use and development thereof. The inks of the invention are water-based and include of from about 4-20% by weight of a water soluble transition metal salt (e.g., nickel sulfate), together with of from about 2-4.5%, by weight of n-butanol or 2-butanol. After application using, e.g., ink jet printing equipment, the resulting inked images are invisible to the naked eye, and can be selectively developed through use of color-forming developers such as dimethylglyoxime- or oxalic acid-type aqueous compositions.Type: GrantFiled: January 2, 1990Date of Patent: February 11, 1992Inventors: Marvin P. Dixon, Haywood A. Walker, Jr.
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Patent number: 5084492Abstract: A high solids content, aqueous, color developer-containing printing inks having as it main ingredients water, a non-volatile diluent and an acidic color developer such as zinc salicylate or a phenolic resin. The high CF printing ink preferably has a 50-70% by weight solids content and may be used as a low-coat-weight CF coating for preparing carbonless copy paper by coating the high solids CF printing ink on a support sheet at a coat weight of less than 3 gm/m.sup.2.Type: GrantFiled: September 28, 1989Date of Patent: January 28, 1992Assignee: Standard Register CompanyInventors: William F. Pinell, Michael E. Seitz, Gary W. Doll
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Patent number: 5084433Abstract: A carbonless paper construction for imaging via electrophotographic copiers comprising microcapsules encapsulating solvents of dialkyl esters of aliphatic dibasic organic acids, polyglycol ethers and alkyl ethers of monobasic aromatic acids.Type: GrantFiled: November 21, 1990Date of Patent: January 28, 1992Assignee: Minnesota Mining and Manufacturing CompanyInventor: Keith A. Kraft
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Patent number: 5071707Abstract: Microcapsules containing a color-forming material and a solvent therefor, the solvent being a mixture of certain oligomeric isomers of benzylcumene and its higher homologues and a mixture of isomers of bis(isopropylphenyl) phenylmethane.Type: GrantFiled: March 26, 1990Date of Patent: December 10, 1991Assignee: AtochemInventors: Raymond Commandeur, Bernard Gurtner
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Patent number: 5053277Abstract: The present invention comprises a pressure-sensitive chromogenic copy system comprising a transfer sheet having on at least a portion of at least one surface thereof a coating of microcapsules having encapsulated therein a solution in an oleophilic solvent of the reaction product of at least one leuco chromogenic compound and at least one electron-accepting color developer capable of reacting with said leuco chromogenic compound in an oleophilic solvent; the oleophilic solvent being a solvent for said leuco chromogenic compound, said color developer and said reaction product. The invention also comprises the transfer sheets, microcapsules, and method of making such microcapsules.Type: GrantFiled: February 18, 1987Date of Patent: October 1, 1991Inventor: Anthony E. Vassiliades
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Patent number: 5047308Abstract: This invention discloses a photo- and heat-sensitive recording material excellent in fixability comprising a support having on one side of which at least one photo- and heat-sensitive layer having a haze % of less than 60 and containing a diazo compound and a coupler, wherein either the diazo compound or the coupler is enclosed in a microcapsule and a process to manufacture it.Type: GrantFiled: June 21, 1988Date of Patent: September 10, 1991Assignee: Fuji Photo Film Co., Ltd.Inventor: Toshimasa Usami
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Patent number: 5014033Abstract: Novel dielectrically improved liquid compositions include at least one electrical insulating oil (A), e.g., benzyltoluene or oligomers thereof, and at least one aldehyde (B) containing at least six carbon atoms, or a functionally substituted such aldehyde, e.g., 3-ethoxy-4-hydroxybenzaldehyde.Type: GrantFiled: September 27, 1989Date of Patent: May 7, 1991Assignee: AtochemInventors: Pierre Jay, Noelle Berger
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Patent number: 5013708Abstract: A coating material for a pressure-sensitive recording sheet comprises both microcapsules A and microcapsules B, wherein the microcapsules A contains a solvent S.sub.1 which dissolves a colorless dye for a pressure-sensitive recording sheet, and the microcapsules B contains a dye-free solvent S.sub.2 which has no ability of dissolving dye and which has a lower boiling point than the solvent S.sub.1. The pressure-sensitive recording sheet using this coating material provides an improved thermal smudge without the deterioration of the image density, etc.Type: GrantFiled: October 24, 1989Date of Patent: May 7, 1991Assignee: Jujo Paper Co., Ltd.Inventor: Fumio Nishiyama
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Patent number: 4960749Abstract: The present invention provides a method of making a concavo-convex pattern such as a fingerprint on a given sheet without soiling the pattern with color, and a set for making the pattern.Type: GrantFiled: June 28, 1988Date of Patent: October 2, 1990Assignee: Matsumoto Yushi-Seiyaku Co., Ltd.Inventors: Satoshi Miura, Masato Nishimura, Shigeki Itoh, Takashi Asari
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Patent number: 4957815Abstract: Polyarylalkane oligomer compositions consisting essentially of a mixture of isomers of xylyl-xylene and of higher homologues and a mixture of isomers of bis(dimethylphenyl)xylylene and of higher homologues; the method of making such compositions by first reacting toluene, xylene, or a mixture of toluene and xylene with chlorine in the presence of a radical generator, removing the unreacted toluene, and then subjecting the reaction product to the action of an inorganic halide or inorganic acid in the presence of xylene, and microcapsules containing color-forming material wherein the compositions are used as solvents for the color-forming material.Type: GrantFiled: July 1, 1988Date of Patent: September 18, 1990Assignee: Societe AtochemInventors: Raymond Commandeur, Bernard Gurtner
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Patent number: 4956120Abstract: Polyarylalkane oligomer compositions containing essentially of a mixture of isomers of benzylcumene and its higher homologues and a mixture of isomers of bis(isopropylphenyl)phenylmethane; the method of making such compositions by first reacting chlorine with toluene, xylene, or a mixture of toluene and xylene in the presence of a radical generator, removing the unreacted toluene and/or xylene, and then subjecting the reaction product to the action of an inorganic halide or of an inorganic acid in the presence of a benzene-related compound; and microcapsules containing color-forming material wherein the compositions are used as solvents for the color-forming material.Type: GrantFiled: July 1, 1988Date of Patent: September 11, 1990Assignee: AtochemInventors: Raymond Commandeur, Bernard Gurtner
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Patent number: 4942150Abstract: A heat-sensitive recording material is disclosed. The material comprises a support having provided on the same surface thereof microcapsules containing a basic colorless dye and an organic solvent, and a developer capable of reacting with the basic colorless dye to develop a color, the capsule walls of said microcapsules being impermeable to either of the basic colorless dye and the developer at room temperature but becoming permeable to the colorless dye and/or the developer upon application of heat. The organic solvent is a compound containing at least two benzene rings in the molecule thereof with a total number of at least one hetero atom selected from nitrogen, sulfur, oxygen and phosphorus atoms, if any, being less than 1/10 a total number of carbon atoms of the organic solvent. The material is excellent in preservability before and after recording and is excellent in heat-developability.Type: GrantFiled: August 8, 1988Date of Patent: July 17, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshimasa Usami, Toshiharu Tanaka, Masataka Kiritani
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Patent number: 4929411Abstract: A heat-sensitive recording material obtained by coating on a support a composition comprising a microcapsulated colorless or light colored color-forming substance which can develop its color by reaction with an organic base, and an emulsified dispersion prepared by emulsifying an organic base dissolved in an organic solvent insoluble or slightly soluble in water, then drying the coat.Type: GrantFiled: December 1, 1988Date of Patent: May 29, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshimasa Usami, Akihiro Shimomura
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Patent number: 4918045Abstract: A recording material comprising a support, a microcapsule containing a substantially colorless electron-donating color former and a solvent, and an electron-accepting developer, wherein the color former is at least one selected from p-substituted aminophenylindolylphthalide derivatives, p-substituted aminophenylindolylazaphthalide derivatives and p-substituted aminophenylindolyldiazaphthalide derivatives, the solvent is a paraffin oil, and the amount of the solvent is at least 20% by weight based on the weight of the core substance.Type: GrantFiled: July 15, 1988Date of Patent: April 17, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsumi Matsuoka, Masanobu Takashima, Ken Iwakura, Keiso Saeki
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Patent number: 4879269Abstract: The present invention provides a pressure sensitive copy material using an electron accepting developer and an electron donating coupler which develops a color by contacting with the developer, the pressure sensitive copy material being characterized by employing phenyl-sec-butylphenyl-methane as a solvent for the electron donating coupler.Type: GrantFiled: April 3, 1989Date of Patent: November 7, 1989Assignee: Nippon Petrochemicals Co., Ltd.Inventors: Naoya Takahashi, Satoshi Narui, Eiichi Matsuzaka
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Patent number: 4859650Abstract: A pressure-sensitive recording material is disclosed, having microcapsules containing a triphenylmethane leuco-dye dissolved in a solvent composed at least 80% of plant, animal or paraffin oils, the microcapsule walls being formed of a wall material which is water-soluble or water-dispersible before the formation of the microcapsules.Type: GrantFiled: September 30, 1987Date of Patent: August 22, 1989Assignee: Feldmuhle AktiengesellschaftInventors: Bodo Hilterhaus, Gunther Hunger
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Patent number: 4845071Abstract: A negative type heatsensitive recording material which can realize high contrast image suitable to overhead projector, comprising on a support a heatsensitive layer prepared by coating a composition containing an emulsified dispersion, which is obtained by dissolving a colorless or light colored electron donating dye precursor and a color developer in an organic solvent slightly soluble or insoluble in water then subjecting the resulting solution to an emulsifying dispersion treatment, and decolorizercontaining microcapsules.Type: GrantFiled: March 16, 1988Date of Patent: July 4, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Akihiro Shimomura, Toshimasa Usami, Seiji Hatakeyama
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Patent number: 4840933Abstract: A heat sensitive recording material which comprises a support having thereon a heat sensitive layer containing at least color former-contained microcapsules and a color developer, with the heat sensitive layer being formed using a colorless or light colored precursor of a basic dye as the color former, and according to a process which comprises preparing a coating composition by mixing the color former-contained microcapsules with an emulsified dispersion prepared by dissolving at least the color developer into an organic solvent which is slightly soluble or insoluble in water, and then dispersing the solution in an emulsified condition, coating the resulting composition on the support, and then drying the coat, whereby the heat sensitive layer comes to acquire both excellent transparency and high sensitivity to heat.Type: GrantFiled: May 26, 1987Date of Patent: June 20, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshimasa Usami, Seiji Hatakeyama, Akihiro Shimomura
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Patent number: 4833117Abstract: Correction compositions for correcting markings provided on the surface of a pressure-sensitive chemical recording medium carrying a developer material which comprises an acidic developer by interaction of the developer material with a color-providing material. The compositions comprise a substantially uniform dispersion of an opacifying pigment, a polymeric film-forming material, and a Lewis acid. The composition is applied to a marking to provide a film which covers the marking, and a visible corrected marking can be provided on the film by applying a pattern of color-providing material corresponding to the corrected marking to the film.Type: GrantFiled: December 3, 1987Date of Patent: May 23, 1989Assignee: The Gillette CompanyInventors: Lamar E. Brooks, Sue R. Liu
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Patent number: 4822767Abstract: A solvent for chromogenic dye-precursor material for pressure-sensitive recording paper sheet, comprising 50 to 80% by weight of p-monoisopropylbiphenyl and 50 to 20% by weight of hydrogenated terphenyl, and a pressure-sensitive recording paper sheet prepared by using the solvent.Type: GrantFiled: July 21, 1987Date of Patent: April 18, 1989Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Yoshio Okada, Tadashi Nakamura, Youichi Ohhira
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Patent number: 4820550Abstract: Disclosed herein is a process for producing a sheet of a color-developer for a pressure-sensitive recording paper, which process comprises the steps of dissolving an organic color-developer in an organic solvent, dispersing the formed solution into water, thereby forming minute liquid droplets with a diameter of 0.01 to 2 .mu.m, removing the solvent in the liquid droplets by heating while taking care not to cause any coalescence of the droplets and also any unstabilization of the emulsion, thereby forming a slurry comprising the minute granules of the color-developer and applying the slurry on a supporting sheet.Type: GrantFiled: October 6, 1987Date of Patent: April 11, 1989Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Makoto Naoki, Shouzou Aoyagi
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Patent number: 4795493Abstract: Disclosed herein are a substantially odorless solvent for a chromogenic dye-precursor material for a pressure-sensitive recording paper sheet, which comprises from 0 to 20% by weight of m-isopropylbiphenyl, from 40 to 75% by weight of p-isopropylbiphenyl and from 5 to 40% by weight of diisopropyldiphenyl, and a pressure-sensitive recording paper sheet comprising a colour-development sheet coated with microcapsules containing a dye solution which is composed of the chromogenic dye-precursor material and the substantially odorless solvent, and a colour-developer sheet.Type: GrantFiled: March 26, 1987Date of Patent: January 3, 1989Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Yoshio Okada, Tadashi Nakamura, Youichi Ohhira
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Patent number: 4792543Abstract: A pressure-sensitive recording sheet is disclosed. The sheet comprises a support having provided thereon a color-forming layer containing microcapsules prepared by encapsulating oil droplets having dissolved therein one or more substantially colorless color formers, wherein said microcapsules contain a compound represented by formula (I) ##STR1## wherein A and B each represents an alkylene group having from 1 to 12 carbon atoms or an alkenylene group having from 2 to 12 carbon atoms; R represents an alkyl group having from 1 to 18 carbon atoms; and n represents an integer of from 5 to 50.Type: GrantFiled: June 17, 1987Date of Patent: December 20, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Shojiro Sano, Keiso Saeki
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Patent number: 4786630Abstract: Disclosed herein are (1) a solvent of a chromogenic dye-precursor material for pressure-sensitive recording paper, which solvent comprises a diarylalkanes containing not less than 80% by weight of a mixture of 1-tolyl-2-phenylpropane and 1,2-ditolylethane, obtained by coupling ethylbenzene and xylene by side-chain dehydrogenation, (2) the pressure-sensitive recording paper sheet prepared by using the solvent and (3) a process for producing the solvent.Type: GrantFiled: December 22, 1987Date of Patent: November 22, 1988Assignee: Kureha Kagaku Kogyo Kabushiki KaishiInventors: Tadashi Nakamura, Takashi Terauchi, Shoichi Hoshi
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Patent number: 4783438Abstract: Disclosed herein is a partially pressure-sensitive recording paper on which an ink has been applied partially, the ink having been prepared by uniformly dispersing microcapsules having a solution of a colorless electron-donating dyestuff as the core material, a thermally melting solid substance and an organic solvent having a mean boiling point of from 250.degree. to 350.degree. C. and a content of aromatic ring carbon of more than 25% while restraining the weight ratio of the solvent to the solid substance and the weight ratio of the solid substance to the microcapsules respectively in a prescribed range.Type: GrantFiled: February 24, 1987Date of Patent: November 8, 1988Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Yoshio Okada, Yuriko Igarashi, Yutaka Igari
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Patent number: 4783439Abstract: A heat-sensitive recording material is disclosed. The material comprises a support having provided on the same surface thereof microcapsules containing a basic colorless dye and an organic solvent, and a developer capable of reacting with the basic colorless dye to develop a color, the capsule walls of said microcapsules being impermeable to either of the basic colorless dye and the developer at room temperature but becoming permeable to the colorless dye and/or the developer upon application of heat. The organic solvent is a compound containing at least two benzene rings in the molecule thereof with a total number of at least one hetero atom selected from nitrogen, sulfur, oxygen and phosphorus atoms, if any, being less than 1/10 a total number of carbon atoms of the organic solvent. The material is excellent in preservability before and after recording and is excellent in heat-developability.Type: GrantFiled: October 11, 1985Date of Patent: November 8, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshimasa Usami, Toshiharu Tanaka, Masataka Kiritani
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Patent number: 4774223Abstract: A diisopropylnaphthalene mixture containing 50% or more of 2,7-isomer is substantially odorless, has a low viscosity and exhibits a high dissolving power particularly for an electron-donating color former including a black color former. By coating of micro-capsules of an ink comprising the solvent and a color former on a substrate, a carbonless copying paper which is odorless and excellent in color developing speed including that at lower temperatures, can be obtained.Type: GrantFiled: October 2, 1987Date of Patent: September 27, 1988Assignee: Toko International Patent OfficeInventors: Yoshio Okada, Masahiro Akatsu, Yohichi Ohira
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Patent number: 4774136Abstract: Disclosed herein are a solvent for a chromogenic dye-precursor material for a pressure-sensitive recording paper sheet, comprising (1) 30 to 80% by weight of p-monoisopropylbiphenyl or a biphenyl mixture of not less than 80% by weight of p-monoisopropylbiphenyl, not more than 20% by weight of m-monoisopropylbiphenyl and not more than 10% by weight of diisopropylbiphenyl, and (2) 70 to 20% by weight of diisopropylnaphthalene or a naphthalene mixture of not less than 97% by weight of diisopropylnaphthalene, not more than 1% by weight of monoisopropylnaphthalene and not more than 2% by weight of triisopropylnaphthalene, and a pressure-sensitive recording paper sheet prepared by using the solvent.Type: GrantFiled: July 21, 1987Date of Patent: September 27, 1988Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Yoshio Okada, Tadashi Nakamura, Youichi Ohhira
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Patent number: 4771034Abstract: A recording material containing an electron donating leuco dye and an electron accepting compound, wherein said electron accepting compound is a salicyclic acid derivative having an alkyl group, an alkoxy group or an aryloxy group as a substituent or a metal salt thereof. The recording material has satisfactory color developability, working preservability and stability.Type: GrantFiled: October 7, 1986Date of Patent: September 13, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Kensuke Ikeda, Ken Iwakura, Masato Satomura
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Patent number: 4770904Abstract: There is disclosed a process for the preparation of a pressure-sensitive recording material which contains in its color forming system a color former and a developer therefor, which process comprises using said color former in the amorphous state.When the color former is in this state, it dissolves more readily and the pressure-sensitive recording material so obtained has good color forming properties and enhanced color strength.Type: GrantFiled: January 16, 1987Date of Patent: September 13, 1988Assignee: Ciba-Geigy CorporationInventor: Rudolf Zink
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Patent number: 4755501Abstract: A color developing composition for pressure-sensitive recording systems comprising an admixture of an alkylidenediphenol and calcium carbonate having a weight ratio of about 2 parts to about 20 parts phenol per 100 parts calcium carbonate. The admixture is formulated in high solids content coating colors having excellent rheological property and stabilty, which are used to produce CF sheets having a coating weight of about 4 to about 10 g/m.sub.2. Preferably, the composition comprises Bisphenol A in an amount of 4 to 10 parts per 100 parts calcium carbonate and the calcium carbonate weight % in the CF coating is greater than 50%. Other embodiments comprise an aqueous dispersion of the admixture, a pressure-sensitive recording manifold and methods of making the dispersion.Type: GrantFiled: May 18, 1984Date of Patent: July 5, 1988Assignee: Amoco CorporationInventors: Yew C. Chang, Richard S. Lamar
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Patent number: 4753759Abstract: A process for manufacturing microcapsules by dissolving or dispersing microcapsule contents in an aqueous solution of acrylic acid-methacrylic acid copolymer and/or acrylic acid-itaconic acid copolymer, then polymerizing urea and/or melamine and formaldehyde in the solution or dispersion adjusted to pH 2.5.about.6.0, and forming film of urea-formaldehyde copolymer, melamine-formaldehyde copolymer, or urea-melamine-formaldehyde copolymer around capusle contents.Microcapsules manufactured by this process are useful for colors for carbonless paper or thermo-changeable colors.Type: GrantFiled: August 1, 1986Date of Patent: June 28, 1988Assignee: Sakura Color Products Corp.Inventors: Hidetoshi Fukuo, Tomio Onoguchi
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Patent number: 4748146Abstract: The invention relates to a process for encapsulating solutions of reactants of color reaction systems by means of conventional encapsulation processes, the reactant initially being dissolved in a solvent with a good dissolving power and immediately prior to emulsification or encapsulation, a non-solvent, which only dissolves the reactant to an insignificant extent, is admixed with the fresh solution obtained in a quantity which adjusts a supersaturated system, the capsules obtainable as a result thereof, as well as their use with an encapsulated solution of a basic color former, which supplies a color by the reaction with acid reactants, in non-carbon paper.Type: GrantFiled: May 15, 1987Date of Patent: May 31, 1988Assignee: Papierfabrik August Koehler AGInventors: Gunther Pietsch, Claus Hartmann
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Patent number: 4746644Abstract: A recording material comprising a support having provided thereon, microcapsules containing a basic leuco dye dissolved in an organic solvent is disclosed. The microcapsules further contains at least one compound selected from the group consisting of 2-mercaptobenzothiazoles, guanidines, thioureas, 2-mercaptoimidazolines and thiurams. The recording material is free from coloration due to exposure to light and provides a recorded image of high density and high contrast.Type: GrantFiled: October 9, 1985Date of Patent: May 24, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Masataka Kiritani, Toshiharu Tanaka, Toshimasa Usami
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Patent number: 4743579Abstract: A recording sheet is provided having a support with a layer of microcapsules on the surface thereof. The microcapsules contain a substantially colorless electron donating color former and a chlorinated alpha-olefin as a solvent for the color former.Type: GrantFiled: March 18, 1987Date of Patent: May 10, 1988Assignee: The Mead CorporationInventor: Robert A. Fetters
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Patent number: 4742043Abstract: A heat-sensitive recording material is disclosed, comprising a support and heat-sensitive recording layer on the support, said layer containing (1) microcapsules containing a basic dye precursor and an organic solvent as the core thereof and (2) a developer capable of forming color on reacting with the basic dye precursor, wherein said microcapsules are produced by the use of a wall-forming substance comprising xylylene diisocyanate or an adduct thereof such that the microcapsule walls are impermeable to both the basic dye precursor and developer at room temperature, but at a temperature of a thermal head during a recording process, become permeable to at least one of the basic dye precursor and developer, thereby permitting formation of a colored image as a result of the reaction between the basic dye precursor and the developer.Type: GrantFiled: January 23, 1986Date of Patent: May 3, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshiharu Tanaka, Toshimasa Usami
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Patent number: 4737189Abstract: Disclosed herein are (1) a solvent of a chromogenic dye-precursor material for pressure-sensitive recording paper, which solvent comprises a diarylalkanes containing not less than 80% by weight of a mixture of 1-tolyl-2-phenylpropane and 1,2-ditolylethane, obtained by coupling ethylbenzene and xylene by side-chain dehydrogenation, (2) the pressure-sensitive recording paper sheet prepared by using the solvent and (3) a process for producing the solvent.Type: GrantFiled: June 6, 1986Date of Patent: April 12, 1988Assignee: Kawaguti & PartnersInventors: Tadashi Nakamura, Takashi Terauchi, Shoichi Hoshi
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Patent number: 4732614Abstract: Correction compositions for correcting markings provided on the surface of a pressure-sensitive chemical recording medium carrying a developer material which comprises an acidic developer by interaction of the developer material with a color-providing material. The compositions comprise a substantially uniform dispersion of an opacifying pigment, a polymeric film-forming material, and a Lewis acid. The composition is applied to a marking to provide a film which covers the marking, and a visible correcting marking can be provided on the film by applying a pattern of color-providing material corresponding to the corrected marking to the film.Type: GrantFiled: July 15, 1985Date of Patent: March 22, 1988Assignee: The Gillette CompanyInventors: Lamar E. Brooks, Sue R. Liu
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Patent number: 4728632Abstract: A carbonless paper solvent, a method of solubilizing a chromogenic material, and a recording sheet, all utilizing triisopropyltoluene, are the subject of the present invention. Triisopropyltoluene may be obtained by the alkylation of toluene and the resulting product will normally contain the 2,3,5, and 2,4,5 and the 2,4,6 isomers. The triisopropyltoluene may be combined with other known dye solvents such as alkylated naphthalenes, diarylmethanes and alkylated biphenyls to present a carbonless paper solvent or it may be utilized alone. The triisopropyltoluene will normally be present in a quantity of at least 40% by weight of the total solvent. A recording sheet may be formed by a paper which is coated with a continuous layer of microcapsules containing chromogenic marking material and a solvent comprising triisopropyltoluene.Type: GrantFiled: March 6, 1987Date of Patent: March 1, 1988Assignee: Koch Industries, Inc.Inventor: Andrew P. Komin
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Patent number: 4721651Abstract: In microcapsules of the type used for pressure-sensitive, carbonless copy papers, having walls formed from aliphatic diisocyanate and diamine and containing a solvent mixture with a dye precursor dissolved therein, the solvent mixture containing a component which easily dissolves the dye precursor and the capsule wall material and a component which only poorly dissolves the dye precursor and the capsule wall, the improvement comprising the poorly dissolving solvent component is an alkylbenzene having from 8 up to 14 C-atoms in the alkyl moiety; and the easily dissolving solvent component is selected from the group consisting of diisopropyl naphthalene, a hydrogenated terphenyl, an alkylated diphenyl, a diphenyl alkane, a chloroparaffin and a mixture thereof, the ratio of easily to poorly dissolving components ranging form 15:85 to 75:25 vol %, and being adjusted within this range so that a solution of the wall-forming aliphatic diisocyanate is just at the turbidity point in the mixture of easily dissolving anType: GrantFiled: June 16, 1986Date of Patent: January 26, 1988Assignee: Feldmuehle AktiengesellschaftInventor: Kurt Riecke
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Patent number: RE33113Abstract: A pressure-sensitive recording paper comprising a support having coated thereon a layer of color former, said color former dissolved in at least one compound represented by the following formula: ##STR1## wherein n is an integer of 1 to 8, R and R' each represent a member selected from the group consisting of alkyl groups containing one to eight carbon atoms, and a hydrogen atom, p and q represent the number of alkyl groups, p+q being an integer of 1 to 3, and R and R' may be the same.Type: GrantFiled: September 17, 1976Date of Patent: November 14, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Masataka Kiritani, Hiroharu Matsukawa, Masayuki Aoki