US3874895A - Recording sheet - Google Patents

Recording sheet Download PDF

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Publication number
US3874895A
US3874895A US301931A US30193172A US3874895A US 3874895 A US3874895 A US 3874895A US 301931 A US301931 A US 301931A US 30193172 A US30193172 A US 30193172A US 3874895 A US3874895 A US 3874895A
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United States
Prior art keywords
acid
recording sheet
color
parts
polymer
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Expired - Lifetime
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US301931A
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English (en)
Inventor
Takao Hayashi
Hajime Kato
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Fujifilm Holdings Corp
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Fuji Photo Film Co Ltd
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/333—Colour developing components therefor, e.g. acidic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
    • B41M5/132—Chemical colour-forming components; Additives or binders therefor
    • B41M5/155—Colour-developing components, e.g. acidic compounds; Additives or binders therefor; Layers containing such colour-developing components, additives or binders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/333—Colour developing components therefor, e.g. acidic compounds
    • B41M5/3331—Macromolecular compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24835—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including developable image or soluble portion in coating or impregnation [e.g., safety paper, etc.]

Definitions

  • ABSTRACT A recording sheet comprising a support having thereon a color developer layer capable of reacting with a color former to form a color image, which color developer layer comprises (1) an acidic polymer and (2) an organic carboxylic acid or a metal salt thereof.
  • the present invention relates to a recording sheet. More particularly, it relates to a recording sheet wherein an improved color developer is used.
  • a coloring reaction between two types of compounds are described below is used to yield a colored product, i.e., reaction between: (1) a nearly colorless organic compound (hereinafter referred to as a color former), e.g., Malachite Green lactone, benzoylleucomethylene blue, Crystal Violet lactone, Rhodamine B lactam, 3- dialkylamino-7-dialkylaminofluoran and 3-methyl- 2,2'-spiro-bi(benzo[f]chromene), and (2) an adsorptive or reactive compound (hereinafter referred to as a color developer) capable of developing color when contacted with the color former.
  • a color former e.g., Malachite Green lactone, benzoylleucomethylene blue, Crystal Violet lactone, Rhodamine B lactam, 3- dialkylamino-7-dialkylaminofluoran and 3-methyl- 2,2'-spiro-bi(benzo[f]chromene
  • a color developer an
  • the above-described color reaction requires pressure with a pen or typewriter, heat or like physical conditions.
  • a pressure sensitive copying paper is the most representative embodiment of a recording sheet.
  • a pressure sensitive copying paper can be prepared by dissolving a color former in chlorinated paraffin, chlorinated diphenyl or like solvents, dispersing the solution in a binder or encapsulating it in microcapsules, and then applying it to a support such as paper, plastic, resincoated paper, etc.
  • a heat sensitive recording paper can be prepared by applying a color former to a support together with an acetanilide or like heat-meltable material.
  • the heat-meltable material is one that will be melted by heat to dissolve the color former.
  • a color developer is usually dissolved or dispersed in water or an organic solvent together with a binder and coated on or impregnated in a support.
  • the color developer may also be coated or impregnated immediately before recording in a manner similar to an ink.
  • the color former and color developer may be applied to the same or opposite surfaces of a support, or to different supports.
  • color developers there are generally used clays such as acid clays, active clays, attapulgite, zeolite, bentonite, etc.; organic acids such as succinic acid, tannic acid, phenol compounds, etc.; phenol resins or like acidic polymers; etc.
  • Phenol resins are rather recent color developers, (Japanese Patent Publication No. 20144/67) though many improvements thereof have been suggested (US. Pat. Nos. 3,516,845; 3,540,911; British Pat. No. 1,065,587).
  • a phenol resin is excellent in that when it is reacted with a color former there are formed colored images stable against water.
  • phenol resins do not have a sufficient color-developing ability, and the light resistance of the developed color images is weak.
  • the colored images obtained from a phenol resin and Crystal Violet lactone easily fade when left in a room or exposed to sunlight and, further, the surface of phenol resin which has not participated in the color formation turns yellow.
  • acidic polymers for example, maleic acidrosin resins or partly or completely hydrolyzed styrenemaleieanhydride copolymers and the like are also essentially too low in color-developing ability to be used practically.
  • a primary object of the invention is to improve the color-developing ability of acidic polymers.
  • Another object of the invention is to prevent the yellowing of acidic polymer which has not participated in the color forming reaction.
  • a further object of the invention is to provide an acidic polymer capable of forming colored images of excellent light resistance.
  • Still a further object of the invention is to provide a color developer having the above-described advantages.
  • Yet another object of the invention is to provide a recording sheet having the above-described advantages.
  • the recording sheet of the present invention can comprise a support and a layer coated thereon containing an acidic polymer and an organic carboxylic acid or a metal salt thereof. Therefore, any form of recording sheet structure known in the art can be employed.
  • the color developer and color former can be provided on the same or opposite sides of a support, or on the surfaces of different supports.
  • the organic carboxylic acids used in the invention include organic compounds having at least one carboxyl group, and include aliphatic carboxylic acids and aromatic carboxylic acids. Most preferred of such acids are those having a maximum of three carboxyl groups and from about 5 to about 20 carbon atoms.
  • the inventors have found, as a result of the investigating of organic carboxylic acids in combination with acidic polymers that all of the compounds within the above class are excellent in color-developing ability, fading-resistance, yellowing-resistance, and the like.
  • aromatic carboxylic acids are especially preferred as they provide excellent effects and, in particular, aromatic carboxylic acids having at least one hydroxy group are preferred with those having from one to three hydroxyl groups being most preferred.
  • any organic carboxylic acid exhibits an improved effect as compared to the use of an acidic polymer alone, and aliphatic carboxylic acids or metal salts thereof, in particular, the monobasic acids and dibasic acids thereof are excellent from the viewpoint of film quality. Monobasic acids are most preferred, however.
  • the aromatic carboxylic acid is preferably from the benzene series, especially salicylic acid derivatives, which preferably have at least one alkyl group having more than 3 carbon atoms, or at least one aryl group, or a cyclohexyl group, or is substituted with a combination of such groups.
  • the metal salts of organic carboxylic acids i.e., the metal salts of aromatic carboxylic acids are especially preferred from the viewpoint of color-developing ability, light resistance of the developed color images and resistance to yellowing.
  • organic carboxylic acids used in the present invention, there are formic acid, acetic acid, caproic acid, heptanoic acid, caprylic acid, pelargonic acid, capric acid, n-undecylenic acid, lauric acid, n-dodecylenic acid, myristylenic acid, n-pentadecylenic acid, margaric acid, stearic acid, nnonadecylenic acid, arachidic acid, heneicosanoic acid, behenic acid, n-tricosanoic acid, lignoceric acid, n-pentacosanoic acid, cerotic acid, n-heptacosanoic acid, montanic acid, n-nonacosanoic acid, melissic acid, n-hentriacontanoic acid, n-dotriacontanoic acid, n-tetratria
  • Metals forming a metal salt with the organic carboxylic acids include sodium, lithium, potassium, magnesium, calcium, zinc, cadmium, aluminum, tin, lead, chromium, manganese, cobalt, nickel, and the like. There is no overly critical aspect to the selection of the exact metal used, i.e., substantially all metal salts are useful.
  • the process of producing the recording sheet of the invention is not particularly limited so long as the acidic polymer and the layer containing organic carboxylic acid or the metal salt thereof are present on a support or on a layer provided on a support (hereinafter, both are referred to as support) as described hereinbefore.
  • acidic polymer in this invention includes all polymers having an acid property, i.e., a polymer which can denate, or emit, an H proton, with preferred polymers being reactive acidic polymers such as phenolic polymers.
  • phenolic polymers are phenolaldehyde polymers and phenol-acetylene polymers.
  • phenolic polymers and salicylic acid-formaldehyde polymers are most preferred, both polymers preferably having a polymerization degree of from 2 to about 15.
  • other acidic polymers especially useful in the present invention are malic acid-rosin resins, partially or completely hydrolyzed styrene-maleic anhydride copolymers, partially or completely hydrolyzed ethylenemalic anhydride copolymers, and partially or completely hydrolyzed vinylmethylether-maleic anhydride copolymers. These polymers are inferior to phenol polymers and salicylic acid formaldehyde polymers, however.
  • a binder is dissolved in water and, after adding thereto an acidic polymer and at least one organic carboxylic acid or a metal salt thereof, the mixture is subjected to ball milling. If necessary, further binder is added thereto. The resulting coating solution is applied to support.
  • the acidic polymer, a binder and the organic carboxylic acid or metal salt thereof are dispersed or dissolved in an organic solvent such as ethanol, methanol, acetone, methyl ethyl ketone, benzene, etc.
  • an organic solvent such as ethanol, methanol, acetone, methyl ethyl ketone, benzene, etc.
  • the coating solution thus obtained is applied to a support such as paper, a paper substitute, a film, etc.
  • a binder is dissolved in water, and acidic polymer is added thereto, whereafter the grain size is adjusted to the desired value by ball milling and the coating solution applied to a support.
  • At least one or more organic carboxylic acids and/or metal salts thereof are dissolved in an organic solvent such as methanol, ethanol, acetone, benzene, etc., and applied to the above-described coated layer.
  • the amount of components such as the acidic polymer and binder used in the production of the recording sheet of the invention are in accordance with the standard amounts as are used in the prior art and can be determined with ease by those skilled in the art.
  • the amount of the organic carboxylic acid or the metal salt thereof is more than about 0.05 parts by weight, preferably, about 0.1 to about 2 parts by weight per 1 part by weight of acidic polymer. Since the upper limit thereof is decided only by economic factors, the effects of the present invention are obviously not lost outside the range defined above.
  • the binder used is not particularly limited so long as it is usable in a recording sheet.
  • Specific examples are synthetic materials such asstyrene-butadiene latex, polyvinyl alcohol, maleic anhydride-styrene copolymer, etc., and natural materials such as casein, gum arabic, gelatin, etc.
  • the amount thereof used is usually more than about 0.05 parts by weight, preferably about 0.1 to about 0.2 parts by weight, per 1 part by weight of the acid polymer.
  • the kind of the binder and the amount thereof added have no special influence on the effects of the invention.
  • a standard color-developer such as an acid clay (produced in Japan and having properties similar to attapulgite) an active clay, etc. in order to increase the color-developing ability, and/or inorganic pigments in order to increase the adsorptive property of the layer.
  • the clay or inorganic pigment is added to increase the adsorptive property of the colordeveloper layer. As the amount of such a substance is increased, the adsorptive property is increased.
  • additives such as a wetting agents or a deforming agents standard in this art may also be added in a manner known to the art.
  • the amount of the above-described color developer coated is more than about 0.1 g, preferably about 0.3 to about 3 g per 1 m of coated areas. This amount is the total solid content of acidic polymer in the coating composition. Of course, the effects thereof are not lost when coated in a greater amount.
  • an amount of solution greater than 0.1 g/m preferably about 0.3 to about 1 g/m is preferred.
  • the acidic polymer used as one component of the color developer of the invention can be any such polymer described in the aforesaid literature, such as phenol-aldehyde polymers, phenol-acetylene polymers, maleic acid-rosin polymers, partly or wholly hydrolyzed styrene-maleic anhydride polymers, ethylenemaleic anhydride copolymers, etc.
  • the recording sheet of the invention has a number of merits. These are enumerated below.
  • the color-developing ability of the recording sheet of the invention is so improved that the amount of the color developer or the amount of the color former on a color former sheet can be reduced and still provide the same developed color density. That is, a reduction in the production cost of the recording sheet is achieved.
  • the recording sheet of the invention will now be described in detail by reference to several Examples; the effects in the Examples were confirmed using the combination of an upper paper and a lower paper, the upper paper. being prepared by producing microcapsules containing a color former as described below and applying them to the support, and the lower paper being prepared by applying the color developer in accordance with the invention to a support.
  • parts are all by weight.
  • Microcapsules containing color former can be prepared in a variety of known processes, but herein the microcapsules were prepared according to the specification of US. Pat. No. 2,800,457:
  • the emulsification is discontinued.
  • 40C water to make the total 900 parts, and stirring is continued.
  • the pH of the solution is adjusted to 4.0 4.2 by the addition of 10% acetic acid to cause coacervation.
  • the solution is then cooled with ice water to cause gelation of the coacervate film deposited around the oil droplets.
  • the temperature of the solution reaches 20C, 7 parts of 37% formaldehyde is added, and, at 10C, 15% sodium hydroxide is added thereto.
  • the solution is heated for 20 minutes with stirring to raise the temperature of the solution to C.
  • the microcapsules thus obtained are applied to a 40 g/m paper in an amount of 6 g/m (solid components) and dried.
  • Microcapsule-coated sheet containing other color formers can be also prepared in the same manner as described above.
  • EXAMPLE 1 170 Parts of p-phenylphenol, parts of an aqueous 37% formaldehyde solution, 10 ml of concentrated (37%) hydrochloric acid and 50 parts of water were charged in a reactor for the production of resin, and reaction was effected at C for 10 hours. Upon coolwas applied to a 50 g/m paper in an amount of 3 g/m (solid components) and dried to prepare a recording sheet (lower paper) of the invention.
  • the spectral absorption curve of the developed color images was measured after irradiating the sheets with sunlight for 2 hours, and the density at the absorption maximum (at a wavelength of 525 mu) was determined.
  • a microcapsule-coated paper containing Crystal Violet lactone was superposed on each of the recording sheets, and a load of 600 kg/cm was applied thereto to develop color. After placing the developed sheets for 1 hour in the dark, the spectral absorption curve of the images was measured between the wavelengths of 400 to 700 mg. The density at the absorption maximum (at a wavelength of 610 mu) was regarded as the fresh density.
  • the spectral absorption curve of the developed color image was then measured after irradiating the sheets with sunlight for 2 hours, and the density at the absorption maximum (at a wavelength of 610 mp.) was determined.
  • the light resistance value was determined according to the following formula:
  • invention 1 Dodecancl.l2-dicarboxylic acid 0.732 37.6 0.603 38.8 66.6 12. o-Chlorosalicylic acid 0.825 59.7 0.700 60.3 67.0 l3. Zinc ochlorosalicylate 0.846 61.1 0.713 62.5 68.8 14. Zinc stearate 0.753 39.9 0.614 40.4 67.5
  • coating solution A was applied to a 50 g/m paper in an amount of 2g/m (solid components) and then dried to prepare a comparative recording sheet.
  • coating solution 0 and 40 parts of coating solution D were admixed and applied to a 50 g/m 10 paper in an amount of 2 g/m (solid components) and then dried to obtain recording sheet 111 of the invention.
  • coating solution C 60 Parts of coating solution C and 80 parts of coating solution D were admixed and applied to a 50 g/m paper in an amount of 2 g/m (solid components) and dried to obtain recording sheet IV of the invention.
  • coating solution C was applied to a 50 g/m paper in an amount of 2 g/m (solid components) to prepare a comparative recording sheet.
  • a recording sheet comprising a support having thereon a color developer layer capable of reacting with a color former to form a color image, which color developer layer comprises (1) an acidic polymer, (2) an organic aromatic carboxylic acid having 1 to 3 carboxylic groups and having 1 to 3 hydroxyl groups or a metal salt thereof, and (3) a binder.
  • the recording sheet of claim 1 where the acid is substituted with one or more members from the group consisting of an alkyl group having more than three carbon atoms, an aryl group or a cyclohexyl group.
  • the recording sheet of claim 4 where the phenolic polymer is selected from the group consisting of phenol aldehyde polymers and phenol acetylene polymers.
  • the recording sheet of claim 8 where from about 0.05 to about 0.2 parts by weight of the binder is present per 1 part by weight of the acid polymer.
  • the recording sheet of claim 9 wherein the layer is coated on the support in an amount of about 0.1 g to 3 g per 1 m of coated area, based on acidic polymer content.
  • the recording sheet of claim 1 further comprising an organic resin binder wherein the acidic polymer is a phenolic polymer or a salicylic acid-formaldehyde copolymer having a polymerization degree of from about 2 to about 15, further wherein:
  • the acid or metal salt thereof is present in an amount of from about 0.1 to about 2 parts by weight per part by weight of the acidic polymer;
  • the binder is present in an amount of from about 0.1
  • the layer is coated in an amount of from about 0.3 to
  • a recording sheet comprising a support having thereon a color developer layer capable of reacting with a color former to form a color image, which color developer layer comprises 1) an acidic polymer capable of donating or emitting a hydrogen proton, (2) an organic aromatic carboxylic acid having 1 to 3 carboxylic acid groups and having 1 to 3 hydroxyl groups or a metal salt thereof, and (3) a binder.
  • a recording sheet comprising a support having thereon a color developer layer capable of reacting with a color former to form a color image
  • color developer layer comprises (1) an acidic polymer selected from the group consisting of phenol-aldehyde polymers, phenol-acetylene polymers, salicylic acidformaldehyde polymers, malic acid-rosin resins, partially or completely hydrolyzed styrene-maleic anhydride copolymers, partially or completely hydrolyzed ethylenemaleic anhydride copolymers and partially or completely hydrolyzed vinylmethylether-maleic anhydride copolymers, and (2) organic aromatic carboxylic acid selected from the group consisting of salicylic acid, o-chlorosalicylic acid, m-hydroxyalicylic acid, phydroxysalicylic acid, gallic acid, 2,4-cresotinic acid, S-methylsalicylic acid, S-tert-butylsalicylic acid, 3,S-di-sec-but

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Color Printing (AREA)
US301931A 1971-11-01 1972-10-30 Recording sheet Expired - Lifetime US3874895A (en)

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JP46086950A JPS525248B2 (enrdf_load_stackoverflow) 1971-11-01 1971-11-01

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US3874895A true US3874895A (en) 1975-04-01

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US (1) US3874895A (enrdf_load_stackoverflow)
JP (1) JPS525248B2 (enrdf_load_stackoverflow)
BE (1) BE790932A (enrdf_load_stackoverflow)
DE (1) DE2253772A1 (enrdf_load_stackoverflow)
ES (1) ES408172A1 (enrdf_load_stackoverflow)
GB (1) GB1414636A (enrdf_load_stackoverflow)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2834773A1 (de) * 1977-09-06 1979-03-15 Mead Corp Verfahren zur herstellung von metallmodifiziertem novolakharz und seine verwendung in druckempfindlichem papier
US4168170A (en) * 1976-03-01 1979-09-18 Eastman Kodak Company Dry heat-activated bleaching of silver images
US4228222A (en) * 1978-03-28 1980-10-14 Kanzaki Paper Manufacturing Co., Ltd. Heat-sensitive record material
US4262936A (en) * 1978-01-05 1981-04-21 Fuji Photo Film Co., Ltd. Color developing ink containing aliphatic esters with 8-25 carbon atoms
US4304183A (en) * 1978-06-26 1981-12-08 A. B. Dick Company Latent image-multiple copy process
EP0070146A1 (en) * 1981-07-09 1983-01-19 Mitsubishi Paper Mills, Ltd. Pressure sensitive copying paper
FR2568823A1 (fr) * 1984-08-13 1986-02-14 Nashua Corp Feuille pour enregistrement de copies sans carbone
US4600930A (en) * 1983-10-13 1986-07-15 Bayer Aktiengesellschaft Recording material which reacts under the influence of heat, its preparation and the use of acid-modified polymers as acceptors in this recording material
US4612254A (en) * 1985-03-07 1986-09-16 Occidental Chemical Corporation Aromatic carboxylic acid and metal-modified phenolic resins and methods of preparation
US4820683A (en) * 1987-12-04 1989-04-11 Appleton Papers Inc. Thermally-responsive record material
US4853364A (en) * 1988-02-05 1989-08-01 The Mead Corporation Developer composition comprising phenol resins and vinylic or acrylic resins
FR2629013A1 (fr) * 1988-03-23 1989-09-29 Appleton Paper Inc Composition revelatrice ou developpatrice de couleur
US4895827A (en) * 1987-12-04 1990-01-23 Appleton Papers Inc. Thermally-responsive record material
US5017546A (en) * 1988-04-20 1991-05-21 Brinkman Karl M Alkyl salicylate developer resin for carbonless copy paper and imaging use
US5030281A (en) * 1988-03-23 1991-07-09 Appleton Papers Inc. Record material
EP0437090A1 (en) * 1990-01-08 1991-07-17 The Mead Corporation Developer material including styrene-maleic anhydride copolymer and reactive organic acid
US5807933A (en) * 1992-06-22 1998-09-15 The Mead Corporation Carboxyl-containing phenolic resin developer and method of preparation

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Publication number Priority date Publication date Assignee Title
GB8511202D0 (en) * 1985-05-02 1985-06-12 Wiggins Teape Group Ltd Record material
JPH07102735B2 (ja) * 1988-04-20 1995-11-08 スケネクタディ、ケミカルズ、インコーポレーテッド 改良された画像形成方法
ES2509116T3 (es) * 2011-09-30 2014-10-17 Mitsubishi Hitec Paper Europe Gmbh Aceptor de color que reacciona formando color con un precursor de colorante, y material de registro termosensible con un aceptor de color de este tipo
EP2910384B1 (de) 2014-02-21 2016-09-21 Mitsubishi HiTec Paper Europe GmbH Wärmeempfindliches Aufzeichnungsmaterial mit einer neuartigen Farbakzeptor-Kombination

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US3664858A (en) * 1970-02-18 1972-05-23 Minnesota Mining & Mfg Heat-sensitive copy-sheet
US3689302A (en) * 1970-01-09 1972-09-05 Ricoh Kk Thermographically color-developable composition
US3746563A (en) * 1971-10-01 1973-07-17 Ncr Pressure sensitive record sheet employing alkyl or halo substituted tetrahalofluorans

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US2972547A (en) * 1957-08-05 1961-02-21 Antioch College Acyl hydrazine compositions and methods of producing color therewith
US3723156A (en) * 1971-06-14 1973-03-27 Ncr Record material

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Publication number Priority date Publication date Assignee Title
US3427180A (en) * 1965-03-31 1969-02-11 Ncr Co Pressure-sensitive record system and compositions
US3418250A (en) * 1965-10-23 1968-12-24 Us Plywood Champ Papers Inc Microcapsules, process for their formation and transfer sheet record material coated therewith
US3689302A (en) * 1970-01-09 1972-09-05 Ricoh Kk Thermographically color-developable composition
US3664858A (en) * 1970-02-18 1972-05-23 Minnesota Mining & Mfg Heat-sensitive copy-sheet
US3746563A (en) * 1971-10-01 1973-07-17 Ncr Pressure sensitive record sheet employing alkyl or halo substituted tetrahalofluorans

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4168170A (en) * 1976-03-01 1979-09-18 Eastman Kodak Company Dry heat-activated bleaching of silver images
DE2834773A1 (de) * 1977-09-06 1979-03-15 Mead Corp Verfahren zur herstellung von metallmodifiziertem novolakharz und seine verwendung in druckempfindlichem papier
US4173684A (en) * 1977-09-06 1979-11-06 The Mead Corporation Production of novel metal modified novolak resins and their use in pressure sensitive papers
US4262936A (en) * 1978-01-05 1981-04-21 Fuji Photo Film Co., Ltd. Color developing ink containing aliphatic esters with 8-25 carbon atoms
US4228222A (en) * 1978-03-28 1980-10-14 Kanzaki Paper Manufacturing Co., Ltd. Heat-sensitive record material
US4304183A (en) * 1978-06-26 1981-12-08 A. B. Dick Company Latent image-multiple copy process
EP0070146A1 (en) * 1981-07-09 1983-01-19 Mitsubishi Paper Mills, Ltd. Pressure sensitive copying paper
US4600930A (en) * 1983-10-13 1986-07-15 Bayer Aktiengesellschaft Recording material which reacts under the influence of heat, its preparation and the use of acid-modified polymers as acceptors in this recording material
FR2568823A1 (fr) * 1984-08-13 1986-02-14 Nashua Corp Feuille pour enregistrement de copies sans carbone
US4578690A (en) * 1984-08-13 1986-03-25 Nashua Corporation Carbonless developer sheet
US4612254A (en) * 1985-03-07 1986-09-16 Occidental Chemical Corporation Aromatic carboxylic acid and metal-modified phenolic resins and methods of preparation
US4820683A (en) * 1987-12-04 1989-04-11 Appleton Papers Inc. Thermally-responsive record material
US4895827A (en) * 1987-12-04 1990-01-23 Appleton Papers Inc. Thermally-responsive record material
EP0319283A3 (en) * 1987-12-04 1990-08-16 Appleton Papers Inc. Thermally responsive record material
US4853364A (en) * 1988-02-05 1989-08-01 The Mead Corporation Developer composition comprising phenol resins and vinylic or acrylic resins
FR2629013A1 (fr) * 1988-03-23 1989-09-29 Appleton Paper Inc Composition revelatrice ou developpatrice de couleur
EP0334642A3 (en) * 1988-03-23 1990-07-11 Appleton Papers Inc. Color developer composition
BE1002265A3 (fr) * 1988-03-23 1990-11-13 Appleton Paper Inc Composition revelatrice ou developpatrice de couleur.
US5030281A (en) * 1988-03-23 1991-07-09 Appleton Papers Inc. Record material
US5017546A (en) * 1988-04-20 1991-05-21 Brinkman Karl M Alkyl salicylate developer resin for carbonless copy paper and imaging use
EP0437090A1 (en) * 1990-01-08 1991-07-17 The Mead Corporation Developer material including styrene-maleic anhydride copolymer and reactive organic acid
US5807933A (en) * 1992-06-22 1998-09-15 The Mead Corporation Carboxyl-containing phenolic resin developer and method of preparation

Also Published As

Publication number Publication date
BE790932A (fr) 1973-03-01
DE2253772A1 (de) 1973-05-10
JPS4851715A (enrdf_load_stackoverflow) 1973-07-20
ES408172A1 (es) 1975-11-16
JPS525248B2 (enrdf_load_stackoverflow) 1977-02-10
GB1414636A (en) 1975-11-19

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