34 results about "Chromism" patented technology

Inks that contain ionically stabilized dispersions and selected polyurethane ink additives are described. These ionically stabilized dispersions are obtained from polymeric dispersants where the hydrophilic components are minimized. These stabilized dispersions can be utilized to prepare ink jet inks which when printed result in improved optical density, chroma, gloss and especially distinctness of image. The stability of the ionically stabilized dispersions are sufficient for ink jet inks. The polyurethane ink additives are chosen from polyurethanes which are urea terminated or crosslinked.

The invention pertains to the technical field of gasochromic film, in particular to a method for improving gasochromism speed of the gasochromic film. The invention adopts sol-gel method for preparing the stable solution containing various metal oxides and the compound solution thereof; and various methods are employed for coating transparent and even gasochromic film on common glass or polished silicon wafer, and ultraviolet or high energy ray and high energy-particle mixing with catalyst are employed in the gasochromic film method so as to change the structure of film and enhance the coloring response speed of the gasochromism of the sol-gel technique, shorten coloring saturation time. Compared with the non treatment film, the gasochromism efficiency are greatly improved; and the performance is the same as the gasochromism produced by magnetron sputtering method, while, cost is greatly reduced; and the produced film by the invention also has the same advantages as the electrochromic film. The invention makes up the shortages of gasochromism smart window made by sol-gel preparation method, thus the smart window technique can be more mature.

Provided are an electrochromic material and an electrochromic device. The electrochromic material comprises a cathode electrochromic material, an anodic electrochromic material, and a mixture of electrolyte and acrylic acid ion salt polyelectrolyte. The anodic electrochromic material is 10-methylphenothiazine. The electrolyte is ethylene carbonate or gamma-butyrolactone. The electrochromic device comprises transparent glass, and reflective glass. All around of the transparent glass and the reflective glass are adhered by an adhesive to form a cavity, which is filled with the electrochromic material. The present invention has the advantages that: the electrochromic material adds charged acrylic acid ion salt polyelectrolyte into a non-uniform electric field, so that the chromism speed of the electrochromic material is fast; and the electrochromic device prepared by the photochromic material is very low in cathode electrochromic material and anode electrochromic material migration rate after a long time chromism.

The present invention relates to anisotropic colorants and ink-jet ink compositions that comprise the anisotropic colorants. These anisotropic colorants are highly stable and can be designed to provide enhanced chroma, gloss, gloss uniformity, smearfastness, print quality, drytime, and improved resistance to water when applied to a media. Moreover, inks formulated with these new colorants are useful in ink-jet printing, including thermal ink jet printing, piezoelectric ink jet printing, and continuous ink jet printing.

The invention discloses a method for preparing magneto-chromism ferroferric oxide sol. The magneto-chromism ferroferric oxide sol is prepared by a synthesis and modification two-step method, namely by the following steps of: synthesizing monodispersity Fe3O4 magnetic particles by adopting a solvothermal method; modifying the product of Fe3O4 magnetic particles by using a surfactant of polyacrylicacid; and dispersing in carrier liquid of water. The magneto-chromism ferroferric oxide sol prepared by the method has uniform particle size distribution of the magnetic particles, good monodispersity, no agglomeration, the average particle size of 100nm and high magnetic property of the particles, has the maximum specific saturation magnetization of the particles of 88emu/g, and is stable and superparamagnetic. The magneto-chromism ferroferric oxide sol prepared by the method can be widely applied in the fields such as machinery, electronics, optics, magnetic, chemistry, biology and the like.

The invention provides a thermochromic composition which little suffers from residual color in the faded state and exhibits relatively large color difference on color change; and a process for production of the same. The invention relates to a thermochromic composition comprising an electron-donating color-developing organic compound, an electron-accepting compound and a desensitizer which is characterized in that the desensitizer is (1) a fatty acid methyl ester having 5 or more carbon atoms in total and/or (2) a fatty acid amide having 4 or more carbon atoms in total. A thermochromic composition having a desired color-temperature hysteresis can be produced by changing the blending ratio between the desensitizers (1) and (2) in incorporating both with the other components.

The invention provides a phosphor paste. The hosphor powder evenly and stably disperses over the paste and the time variation of viscosity is small, and the chromaticity variation of phosphor layer is small after burning. The phosphor paste contains phosphor powder, binder resin, primary amine or secondary amine compound with hydroxyl group, and/or an alkoxyl group and with molecular weight of below 300, and an organic solvent.

The invention provides a luminescent material, a LED, a lamp and a light producing device with wide color range, long afterglow time, variable afterglow color, high brightness and good color rendering. The luminescent material includes a first luminescent material absorbing and converting at least one part of light of the excitation source to emit light with more longer wave and a second luminescent material absorbing and converting at least one part of light of the first luminescent material to emit light with much more longer wave, wherein the first luminescent materials and the second luminescent materials respectively at least includes light-storing luminescent material. Because of adopting the luminescent material, the LED, the lamp and the light producing device all can emit light with wide color range, much long afterglow, variable afterglow color, high brightness and good color rendering.

The problem to be solved by the present invention is to provide a method for forming a multilayer coating film capable of forming a red-based multilayer coating film having high chroma and an excellent sense of depth and weatherability. The present invention provides a method for forming a multilayer coating film comprising the steps of (1) applying a first colored coating composition comprising an organic red pigment to form a first colored coating film having a hue such that the hue angle h in the L*C*h color space diagram is within the range of 23±3°, (2) applying a second colored coating composition comprising an organic red pigment to the first colored coating film to form a second colored coating film having a hue such that the hue angle h in L*C*h color space diagram is within the range of 35±5°, and (3) applying a clear coating composition to the second colored coating film to form a clear coating film; wherein the color difference ΔE between the first colored coating film and the multilayer coating film obtained by Steps (1) to (3) is within the range of 20 to 30.

The invention relates to a method for preparing a multiple-stimulation respond material by virtue of a two-step process. The method comprises the following steps: putting maleimide into a reaction bottle, adding N,N-dimethylformamide and a halogenating reagent, heating until the temperature reaches 58 DEG C for reacting for 48-72 hours, and adding water and dichloromethane sequentially for suction filtration to obtain 3,4-dihalogenmaleimide; putting 3,4-dihalogenmaleimide and a palladium bis(triphenylphosphine) dichloride catalyst into a flask, vacuumizing, then filling the flask with nitrogen, injecting anhydrous N,N-dimethylformamide and 2-(tributylstannyl)thiophene, increasing the temperature to 100 DEG C for reacting for 12 hours, cooling, then adding the mixed solution of dichloromethane and saturated potassium fluoride aqueous solution, then extracting, drying, filtering and purifying through column chromatography to obtain 3,4-bis(2'-thienyl)maleimide. The material prepared by the method provided by the invention has the advantages of good heat stability, simple synthesis steps, high solid-state fluorescent quantum efficiency and the like, and also has the properties of piezallochromy, thermochromism, solvent induced chromism and the like.

This invention provides a new type of alloy gas-caused chromotropic film material including a catalyzing layer, a gas-caused color-change alloy working layer orderly from the top to the bottom or including a catalyzing layer, an anti-diffusion layer, a gas-caused color-change alloy working layer and a transition layer orderly, in which, the catalyzing layer is a Pd, Pt or Rh metal film of 5-15nm thick, the thickness of the gas-caused color-change alloy working layer is 20-100nm and the composition of which is Mg-Ni alloy in the mol ratio of 20:1-10:3 or is based on Mg-Ni alloy doped with rare earth element Y, La or Er, in which, the mol percentage content of the rare earth element is 0.5-10%, or Mg or Ni combined with Y, La or Er and the content of the rare earth is 30-60%, the anti-diffusion layer is NbO of 1-10nm thick and the transition layer is one kind of metal in the 5-30nm alloy.

The invention provides a phase change thermal storage solar water heater with a novel heat dissipation mode.The phase change thermal storage solar water heater comprises a water inlet pipe, a water outlet pipe, a phase change thermal storage solar water heater body and a heat dissipation body.A plurality of parallel vacuum tubes wrapped with thermochromism radiation layers and thermal isolation wrapping layers are arranged inside the phase change thermal storage solar water heater body.Phase change thermal storage materials are located inside the vacuum tubes.The heat dissipation body comprises a plurality of parallel heat conducting rods inserted into the phase change thermal storage solar water heater body and heat dissipation fins located outside the phase change thermal storage solar water heater body.When the temperature of the phase change thermal storage materials is higher than the chromism threshold value temperature of the thermochromism radiation layers, the thermochromism radiation layers become black from transparent and transmit heat to the heat conducting rods in a thermal radiation mode, and heat of the phase change thermal storage materials is transmitted to the heat dissipation fins of the heat dissipation body for heat dissipation, so that the temperature of the phase change thermal storage materials is decreased, and overheating protection of the phase change thermal storage solar water heater is achieved.

The invention relates to a method for decolorizing direct dye wastewater and particularly relates to an electrochemical decoloration method of direct dye wastewater. The method utilizes FTO glass as an anode material and carries out electrochemical decoloration of wastewater in an electrolytic cell. The fluorine-doped tin oxide conductive glass (FTO glass) is used as an anode material and has good light transmittance. If needed, a photocatalytic reagent can be simultaneously added to the waste liquid so as to realize photocatalytic and electrochemical decolorization at the same time so that decolorization effects are improved and energy consumption is reduced. The method has the advantages of significant decoloring effects, low chroma of the decolorized solution, good translucency and repeated use of the electrode, can realize quick decolorization of a direct dye and is conducive to environmental protection.

A colored photosensitive resin composition comprising at least (1) an alkali-soluble binder, (2) a monomer or an oligomer, (3) a photopolymerization initiator or a photopolymerization initiator system, and (4) a colorant The colored photosensitive resin composition of R, G or B, and contains a specific amount of a specific pigment as the above-mentioned colorant. This invention also relates to the color filter etc. which use this colored photosensitive resin composition for formation of each R, G, or B photosensitive resin layer. According to the present invention, it is possible to provide a color filter that has good chromaticity and can realize high color purity especially when used in a large-screen liquid crystal display device such as a notebook computer monitor or a TV monitor, and is suitable for use in such a filter. A colored photosensitive resin composition for a color filter.

The invention discLoses an eLectroacid-chromism responsive fiLm, and beLongs to the fieLd of coLor changing fiLms. The eLectroacid-chromism responsive fiLm comprises an eLectroacid-chromism fiLm, a conductive fiLm, an ion storage fiLm and two transparent conductive Layers, wherein the eLectroacid-chromism fiLm, the conductive fiLm and the ion storage fiLm are stacked in sequence, and the two transparent conductive Layers cover the eLectroacid-chromism fiLm and the ion storage fiLm respectiveLy; the eLectroacid-chromism fiLm is prepared from 20-35 parts of PMMA, 10-15 parts of eLectroLyte soLution, 5-8 parts of eLectroacid, 3-5 parts of acid-responsive materiaL, 4-8 parts of pLasticizing agent, 1-3 parts of LeveLing agent and 1-3 parts of cLearing agent through curing; the conductive fiLm is prepared from 20-30 parts of PMMA, 8-12 parts of eLectroLyte soLution and 2-5 parts of pLasticizing agent through curing; the ion storage fiLm is prepared from 20-30 parts of PMMA, 8-12 parts of eLectroLyte soLution, 4-6 parts of eLectroacid, 2-5 parts of pLasticizing agent and 1-3 parts of LeveLing agent through curing; a scratch-resistant fiLm is pasted on the transparent conductive Layer. TheeLectrochromic fiLm can generate fLuorescence and coLor changes when energized, the coLor deveLopment response speed is high, and the state can be stabLy maintained after voLtage is removed; the eLectrochromic fiLm can be restored to a transparent state by changing the voLtage appLying direction, and the eLectrochromic fiLm can be reused.

The invention relates to a fluorescent material with piezochromism and slovatochromism and a preparation method thereof, and belongs to the technical field of fluorescent materials. The fluorescent material with the piezochromism and the slovatochromism comprises a cyano-substituted p-phenylenevinylene compound, and the structural formula of the cyano-substituted p-phenylenevinylene compound is shown in the specification. The invention further discloses a preparation method of the fluorescent material with the piezochromism and the slovatochromism. The fluorescent material has slovatochromism and piezo-chromism performance at the same time, and compared with an existing fluorescent material, the application range is wider, and popularization is facilitated.

Chromonic azo dyes are particular types of chromonic molecules that are alignable homeotropically (aggregated molecules stack perpendicularly to the surface) on different types of substrates, often without the need of any special surface treatment. This feature enables the optimization of a detection device with increased sensitivity based of the alignment distortion created by a biological immune complex.

The invention provides a diphenol monomer containing an asymmetric fluorophore structure. The diphenol monomer has a structure shown as a formula (I). Polyarylester prepared from the monomer has excellent electrochromism and electrically-controlled fluorescence property; a p-phenylenediamine structure is capable of giving dual chromism to polyarylester, simultaneously reducing initial oxidation potential of the material and ensuring the stability of monocation free radicals; the asymmetric fluorophore structure is capable of effectively reducing the accumulation action of polymer molecular chains, obviously improving the dissolvability, enhancing solid fluorescence strength and accelerating response time. According to the record of the embodiment, the electrochromism and electrically-controlled fluorescence property of the polyarylester prepared from the diphenol monomer containing the asymmetric fluorophore structure provided by the invention are obviously improved.