Abstract: This invention relates to mono- and bis(aryl- and/or heteroaryl)-substituted-phthalazinones, phthalimidines, pyridopyridazinones and pyrrolopyridinones useful as color-forming substances, particularly in electrochromic recording systems, which are prepared by the interaction of a mono- or bis-substituted-phthalide or furopyridinone with a substituted or unsubstituted hydrazine.

Abstract: In order to produce a heat-sensitive record material having high speed recordability without fogging a heat-sensitive record material having a heat-sensitive record layer coated thereon is passed through a nip between a metal roll and an elastic roll of 42.degree. to 69.degree. Shore-D hardness defined by ASTM Standard, D-2240 at a nip pressure enough to obtain a Bekk smoothness of 150 seconds or above on the record layer surface.

Abstract: A heat sensitive recording material is described, which has on a support a heat sensitive coloring layer containing (a) an electron-donating colorless dye, (b) an electron-accepting compound, and (c) at least one ether compound represented by formula (I) or (II) ##STR1## wherein X represents a hydrogen atom, a halogen atom, an alkyl group containing not more than 6 carbon atoms, or an alkoxy group containing not more than 6 carbon atoms; Y represents a hydrogen atom, a halogen atom, an alkyl group containing not more than 6 carbon atoms, or an alkoxy group containing not more than 6 carbon atoms; and R represents a hydrogen atom or an alkyl group containing not more than 18 carbon atoms.

Abstract: This invention relates to a heat-sensitive transfer medium comprising a transfer sheet having a transfer layer containing a leuco dye as the main component and a receiving sheet having a receiving layer containing a developer for said leuco dye as the main component, characterized in that said receiving layer contains porous filler having an oil absorption amount of at least 50 ml/100 g and a phenolic compound expressed by the general formula, ##STR1## wherein R represents an alkylene group and X represents hydrogen or a halogen atom.

Abstract: A heat-sensitive recording material which comprises in its color reactant system, as developer for the color former, at least one aluminum or zinc salt of a phenolsulfonyl compound of the formula ##STR1## wherein R is C.sub.1 -C.sub.12 alkyl, cycloalkyl, phenyl, benzyl, or phenyl which is substituted by halogen, lower alkyl, lower alkoxy, nitro or methylenedioxy, andX is hydrogen, halogen, lower alkyl or lower alkoxy.

Abstract: A new fluoran derivative useful as a colorless chromogenic material has the following formula: ##STR1## wherein R, R.sub.1, R.sub.2, R.sub.3, X and Y have the same meaning as defined hereinbefore.

Abstract: A thermally-sensitive color-forming composition is disclosed which comprises chromogenic material, acidic developer material and a hydroxyanilide compound. Record material comprising this color-forming composition exhibits an absence of image bloom and improved color-forming efficiency and/or image density.

Abstract: This invention relates to recording materials comprising:(a) an organic phosphorus-iron compound having a bond of PO.sup.- and/or PS.sup.- with Fe.sup.+++ in the molecule and(b) a ligand compound capable of reacting with the organic phosphorus-iron compound to form a complex.

Abstract: A heat-sensitive recording sheet comprised of a support base having a heat-sensitive color forming layer thereon is disclosed. The layer is comprised of an electron donating dye, an electron accepting compound which reacts with the dye to form a color and a surface active agent. The surface active agent has a structure of ##STR1## as a hydrophobic atomic group, wherein R.sub.1 and R.sub.2 independently represent an alkyl group having 3 to 18 carbon atoms, an aryl group having 6 to 18 carbon atoms, an aralkyl group having 7 to 18 carbon atoms, or a cycloalkyl group having 5 to 10 carbon atoms. The heat-sensitive recording sheet has high sensitivity, produces high density color images and results a reduced amount of background fog.

Abstract: A carbonless CFB paper includes an aqueous wax emulsion added to the CB coating to act as a barrier between the reactants in the CB coating and in the CF coating, thereby preventing precolor caused by reactants seeping into or penetrating the base paper and reacting with any ruptured capsules in the CB coating.

Abstract: A color developer for use in pressure-sensitive or heat-sensitive recording papers comprise N-monosubstituted sulfonamides which contain at least one electron-withdrawing group within five atoms of the amido group of the sulfonamide. The N-monosubstituted sulfonamide may be in the form of an N-substituted, N'-mono or di-substituted sulfamide, or a polyfunctional molecule containing such an N-monosubstituted sulfonamide as the functional or impeding group thereof. The maximum color developing potential is realized when these compounds are used in conjunction with a source of metal or metal compound.

Abstract: In a heat-sensitive recording material incorporating a colorless or pale-colored basic dye and a color acceptor which is reactive with the basic dye to form a color when contacted therewith, the recording material characterized in that at least one compound represented by the formula [I] is contained in a heat-sensitive recording layer ##STR1## wherein X is --O-- or --COO--, R.sub.1 to R.sub.4 are each hydrogen atom, alkyl having 1 to 8 carbon atoms, aryl having 6 to 10 carbon atoms, aralkyl having 7 to 9 carbon atoms, chlorine atom, acetyl, propionyl, methoxy, methylthio, methoxycarbonyl, cyano, nitro or cyclohexenyl, substituents R.sub.1 and/or R.sub.2 or substituents R.sub.3 and R.sub.4 may link together to form aromatic ring(s), n is an integer of 1 to 10.

Abstract: The heat sensitive transfer medium according to the present invention is characterized in that it comprises a transfer sheet having a transfer layer consisted essentially of a leuco-dye color former and a receiving sheet having a receiving layer consisted essentially of a developer for said leuco-dye and a binder and that said transfer layer further contains 0.01 to 1 part by weight of polyester resin which has a melting point of 50.degree. to 130.degree. C. and a repetition unit represented by the formula: ##STR1## together with 0.01 to 1 part by weight of a porous filler which has an oil absorption of 50 ml or more/100 g, respectively per part by weight of said leuco-dye.

Abstract: This invention provides a multicolor record material comprising a plurality of color forming systems each containing a color forming material and a color developing material and adapted to produce different colors individually, the multicolor record material being characterized in that each of the systems contains a substance which absorbs an infrared beam of specified wavelength for causing the system to produce its color but which substantially does not absorb an infrared beam of different wavelength for causing another system to produce the color thereof.

Abstract: Disclosed is a filler for a heat-sensitive recording paper, which comprises an amorphous silicate having a composition represented by the following oxide molecular ratio:MO:SiO.sub.2 =0.01:1 to 1.1:1wherein M stands for at least one member selected from the group consisting of calcium, barium and zinc, or a product obtained by partially neutralizing said silicate with carbonic acid, said filler having a BET specific surface area of 10 to 70 m.sup.2 /g and a bulk density of 0.14 to 0.30 g/cc and also having such a secondary particle size distribution that secondary particles having a size smaller than 4 .mu.m, as determined by the centrifugal precipitation method, occupy at least 70% by weight of the total particles.

Abstract: A new fluoran derivative useful as a colorless chromogenic material has the general formula: ##STR1## wherein R.sub.1, R.sub.2, X, Y and Z have the same meaning as defined hereinbefore.

Abstract: A heat-sensitive recording material comprises a heat-sensitive layer which is applied onto a base and contains a color-producing substance, which is usually colorless or only slightly colored, and an activator which, under the action of heat, causes the color-producing substance to produce a coloration. In accordance with the invention, the heat-sensitive layer contains a sulfonic acid ester, in particular of a secondary alcohol, as the activator.

Abstract: A heat-sensitive material comprising a support having formed thereon a heat-sensitive recording layer, which has a high whiteness and is suitable for use in high-speed recording, is disclosed. The heat-sensitive recording layer comprises a colorless or pale-colored basic dye and a color developing material that, when heated, reacts with the basic dye to form a color, wherein the heat-sensitive recording layer further comprises at least one heat-fusible material having a melting point in the range of 70.degree. C. to 140.degree. C. and selected from the compounds represented by following formulae (I) to (VI): ##STR1## wherein R.sub.1, R.sub.2, R.sub.5, R.sub.6, and R.sub.7 independently represent a phenyl group, a benzyl group, or a tolyl group, each of which groups may be substituted with a halogen atom; and R.sub.3 and R.sub.

Abstract: Disclosed is a method for coloring an article to be colored, which comprises contacting and reacting, in the article to be colored, (a) at least one aromatically bonded isocyanate compound with (b) at least imino compound being capable of forming a color by the reaction with the isocyanate compound and having at least one>C.dbd.NH group to effect the color formation, and a color-forming material comprising the compounds (a) and (b), at least one of which is supported on an article to be colored. A color or colored image formed by the reaction between the compounds (a) and (b) is excellent in chemical and light resistance.

Abstract: A heat-sensitive recording paper comprising a support having provided thereon a heat-sensitive layer comprising a dye precursor and a color developer at least one of which is dispersed in an organic solvent, e.g., cyclohexane, inert to these two components and microencapsulated is disclosed. The microcapsules are destroyed by applying pressure thereto after coating or before printing.

Abstract: A heat-sensitive recording material is disclosed. The material is comprised of a support base having a color forming layer positioned thereon. The layer is comprised of an electron donating colorless dye, an electron accepting compound, a naphthol derivative, and a urea derivative and/or a urethane derivative. The recording material can provide good color density and color sensitivity.

Abstract: A thermally-sensitive color-forming composition is disclosed which comprises chromogenic material and certain acidic developer material. Record material comprising this color-forming composition exhibits substantially improved performance in certain Group 3 facsimile equipment.

Abstract: A heat-sensitive recording sheet consisting of a support and a coating layer comprising microcapsules each containing therein at least a colorless dye precursor as color former, a color developer and a waxy substance being solid at the normal temperature and melting when heated, gives good image retention over a long period of time, has superior chemical resistance and causes no trailing or sticking to a thermal head when recording is made thereon with a heat-sensitive facsimile or a heat-sensitive printer.

Abstract: A heat-sensitive recording sheet having a color-forming layer comprises a colorless basic dyestuff and an organic color-developing agent, in which the color-forming layer uses a bis-(4-hydroxyphenyl)sulfide compound as the color-developing agent which comprises a compound of particular structure. The sheet provides a superior water-proofness.

Abstract: In a heat-sensitive recording material incorporating a colorless or pale-colored basic dye and a color acceptor which is reactive with the dye to form a color when contacted therewith, the recording material characterized in that the color acceptor comprises at least one compound represented by the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each a hydrogen atom, alkyl having 1 to 8 carbon atoms, aryl or aralkyl, provided that R.sub.1 and R.sub.2, as well as R.sub.3 and R.sub.4, are not hydrogen at the same time.

Abstract: A pressure-sensitive or heat-sensitive recording material, comprising a support, having a developer or both a color former and a developer in or on the support, wherein the developer consists of a metal complex compound of the formula(R).sub.k-n Me(An).sub.n/r (I)whereinMe is an n-valent metal ion,R is a unidentate or polydentate colorless organic ligand which is complexed with the metal ion through heteroatoms,An is a r-valent anion,k is the coordination number 4 or 6 of the metal ion, depending on the metal,n is 1, 2, 3 or 4, andr is 1 or 2.

Abstract: A thermosensitive recording material is disclosed, which comprises a colorless or light-colored coloring material, and a color developer capable of inducing color formation in the colorless or light-colored coloring material upon application of heat thereto, in which the color developer is a phenolic material of the formula ##STR1## wherein R represents an straight-chain or branched alkylene group having at least one hydroxyl group.

Abstract: A heat-sensitive recording material comprising a support having a recording layer provided thereon, the recording layer comprising a colorless or pale-colored basic dye and a color developing material, wherein the recording layer further comprises at least one heat-fusible material represented by the formula (I) or (II): ##STR1## wherein R.sub.1 to R.sub.17 independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a phenyl group, a benzyl group, or a benzyloxy group.

Abstract: A heat sensitive record sheet which comprises a coated layer comprising 2-anilino-3-methyl-6-dibutylaminofluoran.

Abstract: 3-[(Substituted-amino)(aryl or heteroaryl)methyl]-1H-indoles which are useful as color-formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting 3-[(arylsulfonyl)(aryl or heteroaryl)methyl]-1H-indoles with amines or precursors thereof in the presence of a base.

Abstract: A thermosensitive recording material comprising a support material and a thermosensitive coloring layer formed on the support material, the thermosensitive coloring layer comprising a colorless or light-colored coloring material and a color developing material capable of coloring the coloring material upon application of heat thereto, is disclosed, in which the color developing material comprises at least one first bisphenol derivative of the formula (I) and at least one second bisphenol derivative of the formula (II), ##STR1## wherein n is an integer of 1 or 2, ##STR2## wherein X represents halogen, Y represents ##STR3## m is an integer of 1 or 2, and the substitution positions of Xm in the benzene rings are symmetrical with respect to Y.

Abstract: Dibenzyl terephthalate and isophthalate are known compounds. The present invention is concerned with the new use of such known compounds. In a color-developing system which comprises the combination of a color-developing dye and an organic acidic substance, a higher fatty acid amide has been used as a sensitizer for such system. Unexpectedly, we have found that dibenzyl terephthalate or isophthalate is specifically useful as a sensitizer in said system.

Abstract: A thermosensitive recording material is disclosed, which comprises a colorless or light-colored coloring material, and a color developer capable of inducing color formation in the colorless or light-colored coloring material upon application of heat thereto, in which the color developer is a phenolic material of the formula ##STR1## wherein R is an alkylene group selected from the group consisting of an alkylene group having 1 to 10 carbon atoms; an alkylene group having 1 to 8 carbon atoms which are not directly bonded to S in the formula, with 1 to 3 carboxylic groups contained therein; and an alkylene group having 2 to 15 carbon atoms, with 1 to 5 ether bonds contained therein.

Abstract: Disclosed is a heat-sensitive recording material capable of forming an image of a hue close to a pure black at a low density, which comprises a dispersion of a leuco dye, a heat-fusible organic acidic substance solid at normal temperature and a sensitizing agent in a binder, wherein the leuco dye comprises a fluoran type leuco dye for forming a black color and a benzofluoran type leuco dye for forming a red dye in an amount of 0.01 to 1% by weight based on said black color-forming leuco dye.

Abstract: Heat-sensitive recording sheet comprising a base sheet and a color-forming layer including a colorless basic dyestuff and a mono-phenolic 4-hydroxyphenyl compound which is reactive with said dyestuff by heating, wherein said color-forming layer comprises a metal salt of p-alkylbenzoic acid or a metal salt of o-benzoylbenzoic acid (having a particular formula). The sheet provides superior stability against contamination with oily substances while keeping excellent fundamental qualities thereof.

Abstract: A transfer type heat-sensitive recording medium having a porous base impregnated with a colorless color former. A layer of thermally melting ink is formed on one side of the porous base. The first layer is brought into contact with a recording sheet. A layer of thermally melting wax containing a color developer is formed on the opposite side of said porous base and selectively heated according to a video signal. The wax melts and permeates into the porous base to allow the color developer to color on reaction with the colorless color former. The wax layer is further heated by thermal irradiating so that the ink of the ink layer is molten in correspondence to the coloring.

Abstract: Disclosed is a heat-sensitive recording element capable of forming an image of a hue close to a pure black at a low density, which comprises a dispersion of a leuco dye, a heat-fusible organic acidic substance solid at normal temperature and a sensitizing agent in a binder, wherein the leuco dye comprises a fluoran type leuco dye for forming a black color and a rhodamine lactam type leuco dye for forming a red dye in an amount of 1.5 to 30% by weight based on said black color-forming leuco dye.

Abstract: Water-stable phenol-amine complexes of limited water solubility for use in a thermal-sensitive paper coating containing a chromogenic compound.The complexes contain phenolic hydroxy groups and amine groups in an essentially 2:1 ratio, the amines being low boiling amines. The phenols are of the class capable of forming amine complexes having a ratio of two hydroxyl groups for each amine group. The resulting coating compositions effectively resist premature color formation during formulation, and the coated papers produced exhibit enhanced stability.

Abstract: Mono and bis substituted (arylsulfonyl)alkanes useful as color formers, particularly in carbonless duplicating and thermal marking systems, are prepared by the interaction of the appropriate aldehyde or dialdehyde with the appropriate aryl or heterocyclic moiety and the appropriate phenylsulfinic acid in the presence of a catalyst.

Abstract: This invention provides a heat-sensitive record material comprising a base sheet and a heat-sensitive record layer formed over the base sheet and containing a color forming material and a color developing material which undergoes a color forming reaction on contact with the color forming material, the heat-sensitive record material being characterized in that a resin coating layer cured with electron beam is formed over the heat-sensitive record layer; and also a heat-sensitive record material comprising a base sheet and a heat-sensitive record layer formed over the base sheet and containing a color forming material and a color developing material which undergoes a color forming reaction on contact with the color forming material, the heat-sensitive record material being characterized by a resin coating layer cured with electron beam, formed over the heat-sensitive record layer and containing about 5 to about 300 parts by weight of a pigment per 100 parts by weight of the resin.

Abstract: The present invention relates to thermographic record compositions and to novel color developers for thermographic compositions consisting of:the compounds of formula: ##STR1## in which R represents: H, alkyl, NO.sub.2, halogen, aryl, NH.sub.2, OH, COOH, HSO.sub.3, NR.sub.1 R.sub.2, COOR.sub.3, OR.sub.4 (R.sub.1, R.sub.2, R.sub.3, R.sub.4 =alkyl or aryl), X represents H or a group possessing a labile H capable of forming a stable anion by loss of a proton H.sup.+,or their salts of formula, when X=H: ##STR2## in which R and n are as defined hereinabove and M.sup.+ represents a metal cation. The invention is more particularly applicable to supports for recording data.

Abstract: In ordinary heat-sensitive sheets using a colorless to light-colored dye precursor and a color developer which causes said dye precursor to develop a color by reacting with the dye precursor when heated, printability can be improved by establishing the maximum peaks of their void distribution curves at a void diameter of 1.0 .mu.m or less.

Abstract: This invention relates to a plastic identification card with an improved signature panel. There is a problem with existig credit cards in that the existing signature can be obscured by printing over with a patch of clay composition similar to that used to provide the original signature panel. A new signature can then be applied. This problem is overcome by providing a signature panel which is sandwiched between the core stock and a protective transparent film. The signature panel comprises a layer of chemicals reactive under the pressure of a signature to release a colored dye conforming with the signature.

Abstract: A heat-sensitive recording material comprising a heat-sensitive color forming layer on a base is disclosed. The color forming layer contains an electron donating colorless dye and an organic acid to which a heat-fusible substance having a melting point in the range of from 60.degree. to 150.degree. C. is fusion-bonded. A process for producing such recording material by applying to a base a coating solution containing a developer for heat-sensitive recording is also disclosed. The developer is prepared by the steps of dispersing in a dispersion medium a heat-fusible substance having a melting point in the range of from 60.degree. C. to 150.degree. C. and an organic acid, heating the resulting dispersion under conditions that form a turbulent flow, and cooling the heated dispersion to ordinary temperatures.

Abstract: In producing microcapsules using the amino resin as a capsule wall in a system in which hydrophobic core material is dispersed or emulsified in an aqueous acidic solution containing an anionic colloidal substance, said anionic colloidal substance comprises an anionic, water-soluble copolymer consisting of at least three monomers including acrylic acid, hydroxyalkylacrylate or hydroxyalkylmethacrylate and styrenesulfonic acid. The process of the present invention provides a good emulsification against the variation of the emulsifying condition, a good stability of emulsion between the encapsulating reaction, an excellent stability against the variation of the encapsulating conditions and a superior capsule slurry.

Abstract: The invention provides a method and a device for mass-producing a magnetic recording medium which has excellent wear and corrosion resistance and uniform quality along the longitudinal and transverse directions of an elongated base body, wherein the elongated base body in a vacuum chamber is fed to continuously deposit a ferromagnetic material thereon, while a gas is sprayed in the vicinity of an incident angle control section of a mask for controlling an angle of incidence of a vapor flow from a vapor source to the elongated base body. The angle of incidence is kept constant to prevent deposition of the vapor material on the incident angle control section, and simultaneously, a uniform oxide film is formed on the ferromagnetic layer using a gas containing oxygen.

Abstract: A heat-sensitive recording paper which has on a paper support a heat-sensitive recording layer having received a surface treatment in such a state that the recording paper comes to contain moisture in a proportion ranging from 5 wt % to 12 wt % by drying after the coating of the heat-sensitive recording layer. The surface treatment is effected by passing the recording paper through a pressure applying means. The pressure applying means is constructed by metal roller heated up to a temperature of 40.degree. C. to 60.degree. C. and an elastic roller (made preferably of hard rubber). The recording layer is brought into a face-to-face contact with the metal roller.

Abstract: Chromogenic quinazolines are disclosed. These compounds are particularly suitable for use as color formers in pressure-sensitive or heat-sensitive recording materials and give lightfast yellow, orange and red colorations.

Abstract: A desensitizing ink for pressure sensitive copying sheets using at least a desensitizing agent, pigment and binder, wherein said desensitizing agent comprises at least propylene oxide addition compound selected from compounds of the following formulas: ##STR1## wherein a, b and c represent identical or different integers greater than 1; R is an alkyl group, an alkenyl group, an aryl group, substituted alkyl group, substituted alkenyl group or substituted aryl group; and n is an integer greater than 1. The desensitizing inks of the present invention exhibit sufficient desensitizing effect, excellent yellowing resistance and excellent printability, particularly in wet offset printing.

Abstract: A process for the production of aqueous suspensions containing from 35 to 60% by weight of microcapsules by interfacial polyaddition from polyisocyanates and H-active compounds, wherein(a) an isocyanaurate-modified aliphatic polyisocyanate is used as the polyisocyanate, and(b) the suspension is adjusted to a pH-value of .ltoreq.7 after the polyaddition reaction,which microcapsules optimally contain dye precursors and can be used for the production of completely or partly coated copying systems by the rotogravure or flexograph processes.