Abstract: A fluoran compound having the formula: ##STR1## wherein each of R.sub.1 and R.sub.2 is a hydrogen atom, a straight chain or branched alkyl group having from 1 to 8 carbon atoms, a cyclohexyl group, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted benzyl group, Q is ##STR2## (wherein X is a hydrogen atom, a halogen atom, or a straight chain or branched alkyl group having from 1 to 8 carbon atoms), ##STR3## (wherein X is as defined above), or --(CH.sub.2).sub.n OR.sub.4 (wherein R.sub.4 is a straight chain or branched alkyl group having from 1 to 8 carbon atoms, a cycloalkyl group, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted benzyl group, and n is an integer of from 1 to 8), and R.sub.3 is a hydrogen atom, a halogen atom, a lower fluoroalkyl group, an acyl group, an alkoxy group, an alkoxyalkyl group, or a straight chain or branched alkyl group having from 1 to 8 carbon atoms.

Abstract: A thermosensitive image transfer medium consisting of (i) an image transfer sheet having an image transfer layer consisting essentially of a leuco dye, and (ii) an acceptor sheet having an acceptor layer consisting essentially of a color developer which induces color formation in the leuco dye, the color developer being a mixture of a bisphenol derivative of the following formula and a p-hydroxybenzoic acid ester with a melting point of 100.degree. C. or less, and, of the image transfer layer and said acceptor layer, at least one layer containing a porous filler having an oil absorption of 50 ml/100 g or more as measured in accordance with the Japanese Industrial Standard K 5101, ##STR1## wherein X.sup.1 and X.sup.2 each represent a lower alkyl group or halogen, R.sup.1 and R.sup.2 each represent hydrogen or an alkyl group having 1 to 6 carbon atoms, and m and n each represent an integer of 0 through 4.

Abstract: A thermosensitive recording material comprising a support material and a thermosensitive coloring layer formed thereon, in which thermosensitive coloring layer, colored images are formed by the reaction between a colorless or light-colored leuco dye and a color developer of the following formula capable of inducing color formation in the leuco dye upon application of heat thereto, ##STR1##

Abstract: There is provided a thermoresponsive paper sheet comprising a normally colorless or pale-colored chromogenic substance in combination with a phenolic compound and the underlying paper substrate, said sheet further comprises a diether of the formula: ##STR1## wherein R.sup.4 is alkyl of 1 to 5 carbon atoms, benzyl or phenethyl.

Abstract: In a recording material producing images due to a complex formed from an organic phosphorus-iron compound having a bond of PO.sup.- and/or PS.sup.- with Fe.sup.3+ in the molecule and a ligand compound which reacts with the organic phosphorus-iron compound, the present recording material is characterized in that (a) a colorless or light-colored oil-soluble and/or heat-fusible organic compound adheres to the surface of the organic phosphorus-iron compound and/or (b) an organic base is present out of contact with the organic phosphorus-iron compound. The present invention also provides a desensitizer comprising at least one compound selected from the group consisting of (a) organic phosphorus compounds having a bond of P--OH and/or P--SH, (b) organic compounds having an aminocarboxyl group and (c) salts of these compounds (a) and (b).

Abstract: The recording material which reacts under the influence of heat contains an acid-modified polymer of acrylonitrile as an acceptor, in addition to a dyestuff precursor.

Abstract: In a desensitizing ink for the wet offset printing of a given area of the acceptor surface of a duplicating set containing an alkoxylated nucleophilic compound, preferably having a molecular weight lying in the range of from 2000 to 4000 and having a hydrophilic-lipophilic balance (HLB) of from 3 to 6, emulsified water is added to the mass of ink.This rapidly forms a fine stable emulsion of water in the ink which is favorable for continuous wet offset printing.

Abstract: Disclosed herein are a recording paper which is partially pressure-sensitized, comprising microcapsules containing a solution of a colorless color former, sheet material and binder, the microcapsules being fixed to a specified part of a surface of the sheet material via the binder painted on the specified part and majority of the fixed microcapsules having at least a part of the microcapsule exposed to outside of the binder, and a process for producing the recording paper which is partially specified.

Abstract: A thermosensitive recording paper consisting of a dye precursor and a color developer capable of coloring said dye precursor on heating, wherein one type of overcoat layer selected from the group consisting of alginates, alumina sol, colloidal silica and a mixture of alumina sol with colloidal silica is provided as the topmost layer thereof to give improved chemical resistance and good printing quality with a reduced deterioration in sensitivity and no residues and sticking.

Abstract: Heat-sensitive recording sheet comprising a base sheet a color-forming layer including a colorless basic dyestuff and an organic color-developing agent, wherein said color-forming layer comprises a metal salt derivative of nitrobenzoic acid (having a particular formula). The sheet provides superior stability against contamination with oily substances while keeping excellent fundamental qualities thereof.

Abstract: A thermosensitive recording label includes a thermosensitive color-forming layer disposed on one side of a substrate and a heat reflecting layer disposed on another side of the substrate and a delayed action adhesive disposed on the heat reflecting layer. The thermosensitive recording label may be manufactured and used without a backing sheet, thus considerably reducing the weight and volume of the label. In use, the thermosensitive recording label is drawn from a roll or stack and the delayed action adhesive activated by a heat lamp, or the like, to place it in a tacky condition for placement on goods. The heat reflecting layer disposed between the delayed action adhesive and the thermosensitive color-forming layer prevents activation of the color-forming layer during heating of the delayed action adhesive.

Abstract: Heat-sensitive recording sheet comprising a base sheet and a color-forming layer including a colorless basic dyestuff and an organic color-developing agent, wherein said color-forming layer comprises a metal derivative of phthalic acid monoester (having a particular formula). The sheet provides superior stability against contamination with oily substances while keeping excellent fundamental qualities thereof.

Abstract: Heat-sensitive recording sheet comprising a heat-sensitive color developing layer having particular chemicals on the support sheet and an overcoat layer laminated thereon and a backcoat layer on the back of the support sheet, wherein the sheet provides excellent coloring characteristics and high stability in storage.

Abstract: Chromogenic recording materials which utilizes a fluoran compound of the formula ##STR1## wherein R is methyl or ethyl, is described.

Abstract: In a heat-sensitive recording sheet having a heat-sensitive coating layer comprising a colorless to light-colored dye precursor as color former and benzyl p-hydroxybenzoate as color developer which causes said dye precursor to develop a color by reacting with said dye precursor when heated, the color development sensitivity of said sheet particularly at low temperatures is enhanced by allowing said heat-sensitive coating layer to further comprise a terephthalic acid ester having a melting point of 60.degree. C. or higher and a wax having a melting point of 60.degree. C. or higher.

Abstract: Pressure sensitive record material uses a 2,3-disubstituted-1,2,3,4-tetrahydroquinazolin-4-ones of the formula (I): ##STR1## where R.sub.1 and R.sub.2 have defined meanings, as color formers. Preferred compounds of formula (I) are intense fade resistant and stable yellow color formers useful in making black copy formulations.

Abstract: Chromogenic azaphthalides of the formula ##STR1## wherein R.sub.1 and R.sub.2 independently of each other are hydrogen, C.sub.1 -C.sub.12 alkyl which is unsubstituted or substituted by halogen, hydroxyl, cyano or lower alkoxy, or are cycloalkyl, benzyl or phenyl, or benzyl or phenyl which are substituted by halogen, nitro, cyano, lower alkyl, lower alkoxy or lower alkoxycarbonyl; or R.sub.1 and R.sub.2 together with the nitrogen atom to which they are attached are a 5-membered or 6-membered heterocyclic radical and in particular pyrrolidinyl;X is hydrogen, halogen, lower alkyl, lower alkoxy, benzyl, phenyl, benzyloxy, phenoxy, or benzyl or benzyloxy which are substituted by halogen, nitro, lower alkyl or lower alkoxy;Y is C.sub.6 -C.sub.

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 improved color-forming efficiency and/or image density.

Abstract: A recording material is disclosed which contains an electron donating colorless dye and an electron accepting compound. The electron accepting compound is an aromatic compound having a substituted or unsubstituted sulfamoyl group and a hydroxyl group as substituents. The recording material can provide high density images which provide sufficient fastness during storage.

Abstract: A recording material composed of an electron donating colorless dye and electron accepting compound is disclosed. The electron accepting compound is a phenol or naphthol compound having, as a substituent, an aryloxysulfonyl group which can be substituted or an alkoxysulfonyl group which can be substituted. The resulting material provides sufficient color density and strong color fastness by coloration reaction.

Abstract: A record material utilizing the color forming reaction between a substantially colorless chromogenic material and an electron accepting reactant material is disclosed. The colorless chromogenic material used comprises a mixture of the first component consisting of at least one specified phthalide compound having two vinyl linkages and the second component of another kind of chromogenic material which is different from said first component. The first component of the chromogenic material is used in an amount of 5 to 80%, preferably 7 to 50%, by weight with respect to the amount of the second component and in such an amount that the reflectance at any wavelength within the range of 580 nm to 880 nm, preferably within the range of 500 to 880 nm of color images developed by said color forming reaction is less by at least 55% than that of said record material before color developing.

Abstract: Imaging sheets having a coating containing chromogenic material and a photosensitive composition, with at least the photosensitive composition encapsulated in rupturable microcapsules as an internal phase, are processed by free particle abrasion to rupture the microcapsules coating the surfaces of the imaging sheets by establishing relative motion between the imaging sheets and a body of free particles.

Abstract: Disclosed is a recording sheet comprising a support having a layer of color developer capable of reacting with oil-soluble, basic, chromogenic dyes to produce rapidly a mark of improved color intensity and improved fade resistance. In addition to the conventionally used constituents such as binders, whitening agents, and fillers, the coating comprises (a) a phenol-formaldehyde condensate oligomer mixture, (b) an aromatic carboxylic acid, and (c) an inorganic magnesium compound, preferably magnesium oxide or magnesium hydroxide. Best results are obtained when components a, b, and c are present at ratios of 50 parts oligomer, 1.0-2.5 parts acid, and 10-40 parts magnesium compound.

Abstract: A process for producing a heat-sensitive recording paper is disclosed. The process involves pretreating base paper by a high-frequency corona discharge. The base paper treated in this manner can be utilized in producing a heat-sensitive recording material by providing a heat-sensitive layer thereon. By subjecting the base paper to the high-frequency corona discharge treatment the base paper can be uniformly coated with a heat-sensitive recording material without leaving any blank spaces thereon.

Abstract: A thermosensitive image transfer medium consisting of (i) an image transfer sheet having an image transfer layer consisting essentially of a leuco dye, and (ii) an acceptor sheet having an acceptor layer consisting essentially of a coloring agent with a melting point of not higher than 200.degree. C., which induces color formation in the leuco dye, and, of the image transfer layer and the acceptor layer, at least one layer containing a particular image transfer auxiliary agent for facilitating image formation on the acceptor sheet.

Abstract: Record material of the type in which the color forming reaction is between an electron donating chromogenic material and an electron accepting color developer uses one or more metal/oximes as the color developer. Preferred oximes are monoximes, especially salicylaldoxime and its ring substituted derivatives, and dioximes such as dimethylglyoxime and mioxime and the preferred metal is zinc. Metal oximate salts can be used especially the salicylaldoximate, diphenylglyoximate and benzaldoximates of zinc.

Abstract: A thermosensitive recording material which comprises a support material and a thermosensitive color-forming layer formed on the support material, comprising a colorless or light-colored leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of heat thereto, is disclosed, in which the color developer is 4-hydroxydimethylphthalate or a first bisphenol derivative of the formula (I) ##STR1## wherein n is an integer of 1 or 2, and there is interposed between the support material and the thermosensitive color-forming layer an undercoated layer comprising a second bisphenol derivative of the formula (II), ##STR2## wherein X represents halogen, Y represents --SO.sub.2 --or-- ##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: In a thermosensitive recording material comprising a thermosensitive recording layer provided on a support and containing a usually colorless or light-color dye precursor and a color developer which reacts with the dye precursor when heated to effect color development of the dye precursor, the image keeping quality of the recording material can be improved by further containing in the thermosensitive recording layer a compound represented by the general formula: ##STR1## (wherein R.sub.1 and R.sub.2 represent an alkyl group or a halogen).

Abstract: 5-[N-(RCO)-N-R.sup.1 -amino] or (RCOO)-9-(N-R.sup.2 -N-R.sup.3 -amino)-12-(RCO)benzo[a]phenoxazines useful as color formers, particularly in electrochromic recording systems, are prepared by the interaction of the corresponding 5-(N-R.sup.1 -amino)-9-(N-R.sup.2 -N-R.sup.3 -amino)benzo[a]phenoxazinium halide or 9-(N-R.sup.2 -N-R.sup.3 -amino)benzo[a]phenoxazin-5-one with a reducing agent to obtain the corresponding leuco compound and subsequently interacting the leuco compound with at least two molecular proportions of an acylating agent.

Abstract: A colorless, heat-sensitive and heat transfer recording sheet with pressure sensitivity comprising a base sheet, a heat-sensitive recording layer provided on one side of the base sheet and a heat transfer recording layer provided on the other side of the base sheet, the heat transfer recording layer being formed by coating on the base sheet a coating color comprising 3 to 20 parts by weight of microcapsules containing a colorless, electron-donating color former, 3 to 30 parts by weight of microcapsules containing a colorless, electron-accepting color developer, 3 to 30 parts by weight of a solid of a colorless, electron-donating, color former, 10 to 50 parts by weight of a solid of a colorless, electron-accepting, color developer and 25 to 200 parts by weight of a wax.

Abstract: A pressure-sensitive recording sheet is described. The sheet is comprised of a paper substrate which is treated with succinic acid derivatives having an alkenyl group or alkyl group containing from 4 to 18 carbon atoms, or salts thereof. This pressure-sensitive recording sheet is greatly reduced in the formation of fog which occurs in printing the sheet. Thus, it is very useful as no carbon paper.

Abstract: A heat-sensitive recording paper is described, comprising a paper support and a heat-sensitive color-forming layer on the paper support, wherein the paper support contains a cationic softening agent, such as a maleic anhydride copolymer/polyalkylenepolyamine reaction product. This recording paper is excellent both in highspeed recording and curling properties.

Abstract: Record material of the type in which the color forming reaction is between an electron donating chromogenic material and an electron accepting color developer uses one or more oximes as the color developer. Preferred oximes are monoximes, especially salicylaldoxime and its ring substituted derivatives, and dioximes such as dimethylglyoxime and mioxime.

Abstract: The invention relates to chromogenic dihydroquinazolines of the general formula: ##STR1## wherein: the ring A is a monocyclic or polycyclic, unsubstituted or substituted heterocyclic radical which may contain further heteroatoms as ring members,each of X.sub.1, X.sub.2 and Y independently of one another is hydrogen, halogen, lower alkyl, lower alkanoylamino, or a group of the formula ##STR2## X.sub.3 is hydrogen, halogen, lower alkyl or lower alkoxy; each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, Z.sub.1 and Z.sub.2 independently of one another is C.sub.1 -C.sub.12 alkyl which is unsubstituted or substituted by halogen, hydroxyl, cyano or lower alkoxy, or is cycloalkyl, phenyl, or phenyl or benzyl each substituted by halogen, nitro, lower alkyl or lower alkoxy, and the radicals R may also be hydrogen; oreach pair of substituents (R.sub.1 and R.sub.2), (R.sub.3 and R.sub.4) and (Z.sub.1 and Z.sub.

Abstract: A heat-sensitive transfer medium of this invention comprises the combination of a transfer sheet which has on one surface of a substrate a transfer layer consisted essentially of a leuco dye and a binder resin and is provided on its opposite surface with a 0.2-5 .mu.m-thick polyfluorocarbon-containing layer with a receiving sheet which is provided on the substrate with a receiving layer consisting essentially of a developer for the leuco dye and the binder resin, and further comprises adding a porous filler (oil absorption: 50-300 ml/100 g) to the receiving layer and/or the transfer layer.

Abstract: 3-(N-R.sup.2 -N-Acylamino)-7-(N-R.sup.3 -N-R.sup.4 -amino)-10-acylphenothiazines and phenoxazines useful as color formers, particularly in electrochromic recording systems, are prepared by the interaction of the corresponding 3-(N-R.sup.2 -amino)-7-(N-R.sup.3 -N-R.sup.4 -amino)phenothiazinium or phenoxazinium halide with a reducing agent to obtain the corresponding leuco compound and subsequently interacting the leuco compound with at least two molecular proportions of an acylating agent.

Abstract: There is disclosed the use of benzyl 4-benzyloxybenzoate as a responsiveness-increasing agent in a thermoresponsive recording paper sheet comprising a normally colorless or pale-colored chromogenic substance in combination with a phenolic compound.

Abstract: The invention relates to chromogenic quinazolines of the formula ##STR1## wherein Y is a polycyclic non-aromatic heterocyclic radical which is attached to the quinazoline moiety through a fused benzene nucleus and is unsubstituted or substituted, andZ is hydrogen, R, --OR.sub.1, --SR.sub.1 or --NR.sub.2 R.sub.3, whereinR and R.sub.1 are each alkyl which is unsubstituted or substituted by cyano or lower alkoxy, or are cycloalkyl, unsubstituted or substituted aryl or aralkyl or an unsubstituted or substituted heterocyclic radical, and R.sub.1 can also be haloalkyl,R.sub.2 and R.sub.3, each independently of the other, are hydrogen, alkyl which is unsubstituted or substituted by halogen, hydroxy, cyano or lower alkoxy, or are cycloalkyl, phenyl, benzyl, or phenyl or benzyl which are each substituted by halogen, nitro, cyano, lower alkyl, lower alkoxy or lower alkoxycarbonyl, and R.sub.2 can also be acyl; or R.sub.2 and R.sub.

Abstract: A heat-sensitive recording material is described, comprising a heat-sensitive recording layer containing an electron-donating colorless dye and an electron-accepting compound, said heat-sensitive layer being provided on a support member, and said heat-sensitive layer containing from 5 to 50% by weight, based on the total weight of the heat-sensitive layer-constituting components, of polymer particles having an average particle size of from 0.03 to 16 microns, selected from the group consisting of ethylene-.alpha.-olefin copolymer particles, low density polyethylene particles, and ethylene-vinyl acetate copolymer particles.

Abstract: 3-(R-Carbonyloxy)-7-(N-R.sup.1 -N-R.sup.2 -amino)-10-(RCO)-phenothiazines useful as color formers, particularly in electrochromic recording systems, are prepared by the interaction of the corresponding 7-(N-R.sup.1 -N-R.sup.2 -amino)phenothiazin-3-one with a reducing agent to obtain the corresponding leuco compound and subsequently interacting the leuco compound with about two molecular proportions of an acylating agent.

Abstract: A heat sensitive record material comprising at least one colorless or light-colored electron donative dyestuff and at least one color developing agent represented by the general formula: ##STR1## where each of R.sub.1 and R.sub.2 is hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, an alkoxy group having from 1 to 5 carbon atoms or a halogen atom, X is an alkyl group having from 1 to 5 carbon atoms or a halogen atom, Y is a hydroxyl group, an alkyl group having from 1 to 5 carbon atoms or a halogen atom, n is an integer of 1 to 3, and m is an integer of 1 to 4.

Abstract: 4-(N-Acylamino)-8-(N--R.sup.1 --N--R.sup.2 -amino)imidazophenoxazines useful as color formers, particularly in electrochromic recording systems, are prepared by the interaction of the corresponding 1,3-diamino-7-(N--R.sup.1 --N--R.sup.2 -amino)phenoxazinium halide with a reducing agent to obtain the corresponding leuco compound and subsequently interacting the leuco compound with at least two molecular proportions of an acylating agent.

Abstract: A liquid internal phase for use in encapsulated particles to produce high intensity marks includes an organic solvent having a specific amount of colorless chromogenic material and a larger amount of alkylated benzene material to yield a blue mark, and a specific amount of colorless chromogenic material and a lesser amount of alkylated benzene material to yield a black mark.

Abstract: A record member comprising a developer composition comprising a glass comprising a biphenol color developer and a resinous material is disclosed. These compositions are particularly useful as color developers for basic chromogenic material.

Abstract: A heat-sensitive recording sheet is disclosed, comprising a base having thereon a heat-sensitive layer which contains, as main components, at least two kinds of fluoran dye color formers selected from different groups and a developer which causes coloration of the color former by heating. The color image of the heat-sensitive recording sheet fades less under influence of heat or humidity. Further the heat-sensitive recording sheet has high whiteness and less fogging of the background.

Abstract: A diazo-type thermosensitive recording material is disclosed, which comprises a support material, and at least two layers formed thereon, one of the layers being a diazonium compound layer comprising at least a diazonium compound, and another of the layers being a coupler layer comprising at least a coupler capable of reacting with the diazonium compound to form a dye, and a benzimidazole derivative having a substituent at the 1-position thereof.

Abstract: Novel phenolic compounds useful as a color developer suitable for satisfying the quality requirements of heat-sensitive recording materials are provided, which compounds are expressed by the general formula ##STR1## wherein R.sub.1 represents an alkyl group or a cycloalkyl group and R.sub.2 represents hydrogen atom or an alkyl group; and also heat-sensitive recording materials usable in a broad application field are provided, which recording materials are provided with a heat-sensitive recording layer composed mainly of a colorless basic dye and the above compounds as a color developer by which the dye forms colors, overlaid on a substrate.

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 colorless or pale-colored basic dye and a color developing material capable of forming a color when contacted with the dye, the record material being characterized in that the heat-sensitive record layer contains as the color developing material at least one compound represented by the formula ##STR1## wherein R.sub.1 and R.sub.2 are each alkyl having 1 to 8 carbon atoms, a group ##STR2## or a group ##STR3## wherein R.sub.3 and R.sub.4 are each a hydrogen atom, chlorine atom, hydroxyl or alkoxy having 1 to 8 carbon atoms, the heat-sensitive record layer further containing at least one compound selected from the group consisting of 1,1-bis(4-hydroxyphenyl)cyclohexane and hindered phenol compounds.

Abstract: A record member comprising a developer composition comprising a zinc-modified addition product of a phenol and a diolefinic alkylated or alkenylated cyclic hydrocarbon is disclosed. These addition products are particularly useful as color developers for basic chromogenic material.

Abstract: A heat sensitive record material comprising a support sheet and a heat sensitive record layer formed on the support sheet, the heat sensitive record layer being composed essentially of a colorless or light-colored electron-donating colorless dye, an acidic substance which is thermally reactive with the electron-donating colorless dye to develop a color and a binder, characterized in that said heat sensitive record layer contains an effective amount of at least one anilide compound represented by the general formula: ##STR1## where R.sub.1 is an alkyl group having 1 to 6 carbon atoms or a cycloalkyl group; R.sub.2 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfamoyl group or a halogen atom; R.sub.3 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms or a halogen atom; and n is an integer of 0 to 5.