27 results about "Leuco dye" patented technology

Disclosed is a heat-sensitive recording body which has, on one side of a paper support, a primer layer containing hollow particles having a hollow ratio of 80 to 98% and a heat-sensitive recording layer containing a leuco dye and a color developer in this order, and on the other side of the paper support, a back layer containing a pigment, wherein the back layer has a Gurley smoothness of 500 seconds or more, and the hollow particles are contained in a proportion of 5 to 30% by mass in the total solid content of the primer layer.

The present disclosure relates to a composition for preparing a thermochromic solid marker, which enables the production of a color development means for a thermochromic writing instrument capable of being erased in response to a change in temperature in the form of a solid marker having desirable physical properties, and a preparation method for a thermochromic solid marker using the same. The composition for preparing a thermochromic solid marker comprises: 10 to 35 wt. % of microcapsule particles comprising a core composition containing a leuco dye and a developer, and a polymer resin shell surrounding the core composition; 5 to 20 wt. % of a gelling agent; 30 to 60 wt. % of water; and 0 to 10 wt. % of a glycol-based organic solvent.

A solid writing body comprising a leuco dye, a long-chain fatty acid ester, and a solvent capable of dissolving or dispersing the leuco dye.

A readily findable dental appliance is provided having a shell with a plurality of tooth-receiving cavities shaped to receive and resiliently reposition teeth in a patient's mouth from a first arrangement toward a. second arrangement. At least one thermally-sensitive indicator is incorporated with at least a portion of the shell. The thermally-sensitive indicator includes a first temperature-activated thermochromic pigment, which preferably changes from a. first visible color when below a first temperature to a second substantially clear color when above the first temperature. The pigment preferably includes a leuco dye microencapsulated in a polymer such as melamine formaldehyde polymer. A second temperature-activated, thermochromic pigment may be provided, that changes from a. third substantially clear color when above a second temperature to a fourth visible color when below the second temperature, which is, e.g., approximately beverage-drinking temperature.

Disclosed is a heat-sensitive recording body which has, in order on a support, a primer layer containing hollow particles, a binder, and inorganic pigment I, and a heat-sensitive recording layer containing a leuco dye, a color developer, and inorganic pigment II, and which is characterized by containing, as the color developer, an N,N'-diaryl urea-based compound represented by the following formula (1) (in the formula, R2 represents an alkyl group having 1 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or an aryl group having 6 to 12 carbon atoms, and the aralkyl group and the aryl group are each optionally substituted with an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, or a halogen atom, and each R2 can be the same as or different from the others, A1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and each A1 can be the same as or different from the others), and, as the inorganic pigment II, a pigment having an oil absorption of 130 ml / 100 g or less,

The invention provides a hot compress material and a preparation method thereof.The hot compress material comprises a heating medium and at least one temperature change indicator mixed in the heating medium and used for monitoring the temperature of the heating medium, and the temperature change indicator is of a microcapsule structure with a core material and a wall material; the core material is composed of an electron-donating leuco dye, an electron-withdrawing color developing agent and a solvent, and the wall material is composed of resin. The visual temperature change indicator is added in the heating medium, so that the temperature change of each part of the hot compress material can be visually observed, and people can visually know whether the hot compress material reaches the preset temperature or not and whether the temperature of the hot compress material is consistent or not.

Provided is a heat-sensitive recording body having excellent cuttability of a heat seal layer. This heat-sensitive recording body has a heat seal layer including a water-dispersible resin binder on one side of a paper substrate, and a heat-sensitive recording layer including a colorless or light-colored electron-donating leuco dye and an electron-accepting developer on the other side of the substrate, and has an air resistance of 100,000 seconds or less.

The invention discloses a light pressure dual-sensitive leuco coating composition and compression-resistant anti-counterfeiting paper.The coating composition comprises a first component and a second component which are used for coating different areas of paper to form films, and the first component comprises composite dye microcapsule emulsion, an adhesive and a silane coupling agent; the second component comprises the following raw materials: a film-forming agent, a color developing agent, an auxiliary agent, a filler and an adhesive. The invention has the advantages that the leuco film layer formed by the first component has both the organic fluorescent dye and the leuco dye, not only can display fluorescence during ultraviolet irradiation, but also can develop color when the friction film layer formed by the second component applies pressure to the leuco film layer and rubs, and the two developing effects and the anti-counterfeiting effect are better; the leuco film layer and the friction film layer are arranged in different areas of the paper, under the condition that the leuco film layer and the friction film layer are not folded to make contact with each other, when one of the film layers is independently pressed, color development is avoided, and therefore in the coating process and the transportation process, the problem of accidental color development does not exist even if the film layers are pressed.

Disclosed is a heat-sensitive recording body which comprises, on a supporting body, at least a heat-sensitive recording layer that contains a leuco dye, a developer, and an adhesive. The heat-sensitive recording body is characterized in that the heat-sensitive recording layer contains, as a main first developer, an N, N'-diarylurea-based compound represented by general formula (1) (wherein R2 represents an alkyl group having 1 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or an aryl group having 6 to 12 carbon atoms, the aralkyl group and the aryl group may be substituted by an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, or a halogen atom, and the plurality of R2 moieties may be the same or different, A1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and the plurality of A1 moieties may be the same or different), and contains, as a second developer, at least one compound that is selected from the group consisting of a urea urethane compound represented by general formula (2) and 5-(N-3-methylphenyl-sulfonamide)-N',N"-bis-(3-methylphenyl)-isophthalic acid diamide.

The present application relates to the technical field of pigment material, and particularly relates to a water-caused fading pigment block and application thereof. The pigment block is in a solid block structure, and is prepared from leuco dye, anhydrous calcium sulfate, organic weak acid, water-soluble binder, humectant, dispersant, preservative, pH regulator and deionized water, wherein the leuco dye is a fluoran dye with a lactone ring closed structure, and the anhydrous calcium sulfate is used as an inorganic forming skeleton material. By controlling the component ratio and particle size range, the forming property of the pigment slurry and the system stability are considered. The pigment block can be coated on the surface of a water-impermeable substrate by kneading or externally applying oxalic acid aqueous solution, and can be removed by water wiping or washing. The pigment block has stable structure, simple preparation process, is suitable for use in a block form, and meets the requirements of repeated writing or coating and water washing removal.

To provide a thermal recording medium having good color developing sensitivity, printing running properties (especially head scum adhesion resistance) and scratch resistance and good printing fineness at the time of high speed printing, and its manufacturing method.SOLUTION: The thermosensitive recording body is obtained by providing a primer layer, a thermosensitive recording layer containing a colorless or light-colored electron-donating leuco dye, an electron-accepting developer and a sensitizing agent, and a protective layer in this order on a support, wherein the total content (solid content) of the leuco dye, the developer and the sensitizing agent in the thermosensitive recording layer is ≥ 70.0 wt.%, and the coating amount of the thermosensitive recording layer is ≤ 2.5g / m2.SELECTED DRAWING: None

Non-phenolic direct thermal recording media have a thermally responsive layer containing a leuco dye and a plurality of diarylurea acidic developers selected to improve the quality and readability of the image produced in such media, particularly after being contacted with oils such as vegetable oil. The diarylurea developers preferably include, or consist essentially of, or consist of, N,N′-diphenylurea (“DPU”) and a derivative of DPU. An exemplary combination is DPU together with a developer known commercially as TGMD.

A coloured composition comprises a non-aqueous solvent, a leuco dye, a developer compound, and optionally a thickener and a surfactant. The composition is preferably an ink or paint that may be render

The present invention addresses the problem of providing: a heat-sensitive recording medium which has excellent color development sensitivity, printing travelability (particularly, resistance to print head residue adhesion), and rubbing resistance, and which has excellent print fineness during high-speed printing; and a method for producing the heat-sensitive recording medium. [Solution] A heat-sensitive recording material in which an undercoat layer, a heat-sensitive recording layer containing a colorless or light-colored electron-donating leuco dye, an electron-accepting developer and a sensitizer, and a protective layer are sequentially provided on a support, the total content (solid content) of the leuco dye, the developer, and the sensitizer in the heat-sensitive recording layer is 70.0% by weight or more, and the coating amount of the heat-sensitive recording layer is 2.5 g / m2 or less.

The present invention addresses the problem of providing a recording paper having both excellent heat-sensitive recording adaptability and ink-jet recording adaptability, and also having excellent heat resistance and strength of a recording layer. [Solution] A recording paper which comprises a support and a recording layer that is provided on the support and contains a leuco dye and an electron-accepting developer, the recording layer containing an electron-accepting developer, the solubility of the electron-accepting developer in ethanol being 0.3 g / ml or less, the recording layer containing silica as a pigment for accepting ink, and the recording layer containing silica as a pigment for accepting ink. And the solid content blending amount of the silica relative to the recording layer is 20 mass% or more.

The present application belongs to the field of textile printing and dyeing processing, and discloses a method for continuous dyeing of cellulose material loose fibers with indigo. The method is as follows: cellulose material loose fibers are combed into a fiber layer by a netting machine, the fiber layer is immersed in an indigo leuco dye solution by a continuous loose fiber dyeing machine, and then is sent into a continuous oxidation reaction box to realize oxidation and color development of the indigo leuco body and complete the dyeing process. The continuous oxidation reaction box comprises a cuboid box body and a conveying system, a reaction supply system and a negative pressure filtration system in the box body. The conveying system comprises a caterpillar conveyor belt. The negative pressure filtration system comprises a negative pressure cavity and a vacuum pump, and the negative pressure cavity is used for filtering the fiber layer carried on the upper surface of the caterpillar conveyor belt. The reaction supply system comprises a temperature control unit and an oxidation medium supply unit. The present application can improve production efficiency, ensure dyeing depth and uniformity of the fibers, save dyeing water, and reduce the amount of caustic soda and sodium hydrosulfite.

To provide a non-phenolic direct thermal recording medium. [Solution] The non-phenolic direct thermal recording medium has a thermal response layer containing a leuco dye and a plurality of non-phenolic colorants, including 1,3-diphenylurea (DPU) and urea urethane (UU). This chemical enables a multi-purpose recording material that can withstand multiple different types of environmental conditions or chemicals, such as water immersion, contact with polyvinyl chloride meat packaging film, boiling water, dry and wet heat, sunlight, and contact with hand sanitizer. Due to the unique non-phenolic chemical, the coating weight of the thermal response layer of the product is 1.48 g / m². 2 It can be made extremely lightweight, weighing less than a certain amount.

To provide a thermal recording medium with excellent alcohol resistance, heat resistance, and bleach resistance. [Solution] A thermal recording body comprising a thermal recording layer on a support containing at least a leuco dye, a color developer and an adhesive, wherein the main first color developer of the thermal recording layer is general formula (1): TIFF2026090861000008.tif30170 It contains a compound represented by the formula (2): TIFF2026090861000009.tif22170 A thermal recording body characterized by containing a urea urethane compound represented by and at least one selected from 5-(N-3-methylphenyl-sulfonamide)-N',N''-bis-(3-methylphenyl)-isophthalic acid diamide.

The objective of this invention is to provide a thermal recorder that exhibits excellent high-speed printability, as well as superior oil resistance, plasticizer resistance, and printability, among other properties required for thermal recorders. A thermal recorder comprises a base coating on a support, and a thermal recording layer containing a colorless or light-colored electron-donating leuco dye and an electron-accepting developer on the base coating. The electron-accepting developer in the thermal recording layer contains a urea compound represented by the following general formula (Chemical Formula 1). The base coating contains 50-95% by weight of pigment (solid content) and 50% or more by weight of hollow plastic particles relative to the pigment (solid content). (Where X represents -O- or -NH-, R...) 1 Represents a hydrogen atom or -SO2-R 3 R 3 Indicates substituted or unsubstituted alkyl, aralkyl, or aryl groups, R 2 (This represents a hydrogen atom or an alkyl group, m represents an integer from 0 to 2, and n represents 0 or 1.)

The utility model discloses a collision mark leaving label which comprises at least one using part, the using part comprises an upper paper layer, a lower paper layer, an adhesive layer and a bottom paper layer which are sequentially arranged, the lower paper layer and the bottom paper layer are fixed through the adhesive layer, the side edges of the upper paper layer and the lower paper layer are fixed, an upper aiming point is drawn in the middle of the face, back to the lower paper layer, of the upper paper layer, and a lower aiming point is drawn in the middle of the face of the lower paper layer. A lower aiming point aligned with the upper aiming point is drawn on the surface, facing the upper paper layer, of the lower paper layer, a color former is arranged on the surface, facing the lower paper layer, of the upper paper layer, the color former comprises colorless dye encapsulated by microcapsules, and a color developing agent is arranged on the surface, facing the upper paper layer, of the lower paper layer; when the surface, back to the lower paper layer, of the upper paper layer is subjected to a force which is close to the lower paper layer and can crush the microcapsules, the colorless dye flows out of the microcapsules and is in contact with the color developing agent for color development. Compared with the prior art, the utility model has the advantages of low manufacturing cost and convenience in carrying and use.

Microcapsules including a color-filtering shell and a core comprising a leuco dye or dye precursor, a photoinitiator or photosensitizer, and a photohardenable or photosoftenable material are provided for use in microcapsule imaging sheets. The imaging sheets including such microcapsules reduce undesirable crosstalk among the microcapsules of various colors and provide significantly improved color fidelity of the image thus reproduced.

To provide an active energy ray-curable ink composition capable of achieving both good film strength and visibility of the degree of curing, and to provide a printed matter having a layer of a cured product of the active energy ray-curable ink composition.SOLUTION: An active energy ray-curable ink composition comprising a leuco dye and a radically polymerizable compound, wherein the content of the leuco dye is 0.1 to 2% by mass based on the total amount of the composition, the content of the radically polymerizable compound is 35% by mass or more based on the total amount of the composition, and the content of the radically polymerizable compound having one (meth) acryloyl group in the molecule is 25% by mass or less based on the total amount of the composition, in particular, it is suitable as an ink for detecting the irradiation amount of an active energy ray.SELECTED DRAWING: None

A readily findable dental appliance is provided having a shell with a plurality of tooth-receiving cavities shaped to receive and resiliently reposition teeth in a patient's mouth from a first arrangement toward a second arrangement. At least one thermally-sensitive indicator is incorporated with at least a portion of the shell. The thermally-sensitive indicator includes a first temperature-activated thermochromic pigment, which preferably changes from a first visible color when below a first temperature to a second substantially clear color when above the first temperature. The pigment preferably includes a leuco dye microencapsulated in a polymer such as melamine formaldehyde polymer. A second temperature-activated thermochromic pigment may be provided that changes from a third substantially clear color when above a second temperature to a fourth visible color when below the second temperature, which is, e.g., approximately beverage-drinking temperature.

This invention discloses a highly stable and antioxidant thermosensitive color-developing patch and its preparation method. The highly stable and antioxidant thermosensitive color-developing patch is composed of a base layer, a thermosensitive color-developing layer, and a protective layer, sequentially composited. The thermosensitive color-developing layer, by mass parts, comprises the following components: 8-15 parts of leuco dye, 12-20 parts of color developer, 15-25 parts of modified lignin color-developing synergist, 8-15 parts of selenium ether-based temperature-controlled antioxidant, 10-12 parts of freeze-dried rosemary essential oil nanoliposomes, and diformyl xylose. The invention comprises 7-8 parts sensitizer, 10-18 parts binder, 30-50 parts solvent, 2-5 parts auxiliary antioxidant, and 3-7 parts plasticizer. It utilizes four core components—modified lignin color-developing synergist, selenium ether-based temperature-controlled antioxidant, freeze-dried rosemary essential oil nanoliposomes, and diformyl xylose sensitizer—to form a synergistic system that replaces traditional bisphenol color-developing agents and single antioxidants. This solves the technical problems of poor antioxidant properties, insufficient color-developing stability, and potential safety hazards in existing technologies.

A hot-melt wetness indicator composition, comprising: (A) at least one C13-30 aliphatic monohydric alcohol; (B) at least one polymer selected from a vinylpyrrolidone homopolymer, a vinylpyrrolidone / vinyl acetate copolymer, and any combination thereof, the polymer having a weight-average molecular weight Mw ranging from 4,000 g / mol to 1,000,000 g / mol; (C) at least one leuco dye; (D) at least one color developer; and (E) at least one tackifier, wherein the hot-melt wetness indicator composition is free of a rosin-based tackifier and a surfactant. Also provided herein are an article comprising the composition and use of the composition. The hot-melt wetness indicator composition is skin-friendly, and has an excellent compatibility, an excellent discoloration performance including significant change in color and rapid discoloration speed, and a higher hydrostatic pressure that allows the applicability in highly breathable films for alleviating or avoiding the fluid leakage issue.

The present disclosure is a printing ink for a heat-sensitive recording medium, which is the following (A) or (B): (A) a heat-sensitive color-developing printing ink that contains a leuco dye, a color developing agent, a vinyl pyrrolidone-vinyl acetate copolymer, and a solvent, in which the color developing agent is at least one selected from the group consisting of: an N, N '-diarylurea compound represented by general formula (1) (in the formula, R1 represents a hydrogen atom or a methyl group); and R0 represents a C1-12 alkyl group, a C7-12 aralkyl group, or a C6-12 aryl group. The aralkyl group and the aryl group may be substituted by a C1-12 alkyl group, a C1-12 alkoxy group, a C6-12 aryl group, or a halogen atom. The plurality of R0 may be the same or different. A1 represents a hydrogen atom or a C1-4 alkyl group. The plurality of A1 may be the same or different. ), a compound represented by general formula (2) (in the formula, R1 to R5 may be the same or different and each represents a hydrogen atom, a halogen atom, a nitro group, an amino group, an alkyl group, an alkoxy group, an aryloxy group, an alkylcarbonyloxy group, an arylcarbonyloxy group, an alkylcarbonylamino group, an arylcarbonylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, a monoalkylamino group, a dialkylamino group, or an arylamino group. The catalyst is 5-(N-3-methylphenyl-sulfamoyl)-N ', N' '-bis-(3-methylphenyl)-isophthalic acid diamide; and (B) a protective layer printing ink for a heat-sensitive recording medium, the protective layer printing ink containing an adhesive, a sliding property imparting agent, and a solvent, the adhesive being a polyvinyl acetal resin, and the sliding property imparting agent being an alkyl phosphate ester and / or a salt thereof.

This invention relates to a corrugated cardboard box with color-changing markings and its manufacturing process, belonging to the field of cardboard box manufacturing. The surface of the corrugated cardboard box has a color-changing marking area, which, from bottom to top, includes: a pre-coating layer containing a color developer, and a layer of functionalized porous polymer particles loaded with a leuco dye and a phase-change organic medium. The key feature is that when the ambient temperature exceeds the phase-change temperature of the organic medium, the medium melts into a liquid state and carries the dye to the pre-coating layer, where it comes into contact with the color developer and undergoes an irreversible color-changing reaction, forming a bright blue-purple warning marking.