leuco dyes uses
leuco dyes uses
PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362. The mixture was rendered to a fine paste and screen-printed onto a substrate at a thickness of approximately 7 Î¼m to form an imaging medium. Indocyanine Green (1.5 grams of a 10% solution) in de-ionized water was mixed thoroughly with 50 g of screen-printing paste, commercially available from Savoir Faire, Novato, Calif., under the tradename LASCAUX to form a paste mixture. Thermal can also include actual contact between an absorber and a leuco dye, such as in immediately adjacent layers, or in an admixture including both constituents. For example, Coors Light Beer Cans have a coolness indicator on the can itself. Ann Clin Lab Sci. Leuco dyes illustrate if something is too hot, too cold or if the temperature is alright. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. In an alternative embodiment, each sled can be configured to be independent of the other. And, although you least expect it, tapes could add the intricate level of detail to push your brand apart. Riverside Buildings They change their colour at very specific temperatures. ); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY, Free format text: Other variations can also be implemented, including the adding of a non-leuco colorant to impart additional desired color to the image. To the melted powder was added 20 g of phenol,4,4â²-sulfonylbis(2-(2-propenyl)) activator (available under the tradename TG-SA) having the structure: and 1.2 g of IR absorber IR780. 1, a system for labeling a substrate having a black leuco dye thereon, indicated generally at, In accordance with the present invention, an image is digitally stored on image data source. In one embodiment, a radiation spot size of between about 10 and about 60 Î¼m can also be utilized. “Whenever you see an opportunity to create a WOW moment, act on it”. The developed image was produced without the use of a printing intermediary, and provided an image having high optical density. A second step can comprise transferring image data from a data source to an electromagnetic radiation source configured to produce electromagnetic radiation. ); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY, PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP. c) inducing a color change in at least a portion of the electromagnetic radiation sensitive composition by exposure to the electromagnetic radiation at a predetermined frequency, intensity, time, and spot size to produce a visible image on the optical disk. b) a substrate having an electromagnetic radiation sensitive composition coated thereon, said electromagnetic radiation sensitive composition comprising: i) a leuco dye which is capable of forming a black image upon development, said leuco dye being an isobenzofuranone-containing dye; ii) an activator configured for reaction with the leuco dye; and, iii) an electromagnetic radiation absorber admixed with or in thermal contact with the leuco dye, which is thermally active under the influence of electromagnetic radiation sufficient to facilitate the reaction; and. They serve a purpose. With these variables, the electromagnetic radiation source can direct electromagnetic radiation to the electromagnetic radiation sensitive composition in accordance with the image data source and information received from the signal processor. When the black leuco dye is prepared in a solution form, it may be desirable to underprint a colored coating over at least a portion of the substrate beneath the leuco dye solution. When admixed with or in thermal contact with a leuco dye and/or activator, an absorber can be present in sufficient quantity so as to produce heat sufficient to at least partially develop the leuco dye in accordance with embodiments of the present invention. The interaction is most often thermally initiated, but may also be physical in nature. Next, 14.5 g of 2â²-anilino-3â²-methyl-6â²-(dibutylamino)fluoran (BK-400 leuco dye available from Nagase Co., Ltd.) having the structure: and having an average particle size of less than about 5 Î¼m was added to the solution. The benzyl 4-hydroxybenzoate was prepared by milling the particles to an average particle size less than 11 Î¼m and drying to approximately 50% solids. However, thermochromic liquid crystals are not widely used as they are difficult to work with. The electromagnetic radiation sensitive composition can comprise a leuco dye which is capable of forming a black image upon development, such as an isobenzofuranone-containing dye. A Detailed Guide for Ancillary Packaging Materials, Plastic vs Paper: How to Pick The Right Packing Tape for Your Business, Innovations in Packaging Industry | January, 2018, How Brands Can Evolve Their Packaging Design During COVID Times, Innovations In The Packaging Industry | May 2018. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Of the three leuco-dyes studied, only benzidine yielded a completely linear calibration curve, but its relative instability and reported carcinogenicity are serious disadvantages. A third widely used leuco dye is Crystal violet lactone. LD's are reversible. That’s because thermochromic tapes add a function. The company introduced packaging for its canned beverage. The same emitter and diode combinations could be used to read and write data and then the disk could be inverted and a black image could be developed using the leuco dyes of the present invention. The corresponding chemical structures are shown, respectively, as follows: Leuco dyes containing halides such as halide isobenzofuranone leuco dyes can also be used in the present invention. 2B shows a leuco dye layer, In yet another alternative embodiment of the present invention, FIG. Several commercial IR absorber compounds such as IR780 and IR783 (available from Aldrich Chemical Company) and dithiophenylidene compounds (Syntec 9/1 and Syntec 9/3), shown below respectively, can also be used in the present invention. |
The singular forms âa,â âan,â and âtheâ include plural referents unless the context clearly dictates otherwise. Several non-limiting examples of suitable activators include phenols, carboxylic acids, lewis acids, oxalate complexes, succinate acid, zinc stearate, and combinations thereof. The absorber can be configured to be in a heat-conductive relationship with the isobenzofuranone-containing leuco dye. containers, specially adapted for co-operation with the recording or reproducing apparatus Intermediate mediums; Apparatus or processes specially adapted for their manufacture, Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals, Identifying or analogous means applied to or incorporated in the record carrier and not intended for visual display simultaneously with the playing-back of the record carrier, e.g. Leuco dyes are the more commonly-used printing inks in temperature-sensitive tapes. Ramaiah Muthyala. In preparing the black-forming leuco dyes, such dyes can be prepared in solution which is substantially transparent or translucent. This article is also available for rental through DeepDyve. Colorimetric microdetermination of free fatty acids. With an increase in the need for security features in packaging, thermochromic tapes act as an alternative to a hologram and other security seals. Please enable it to take advantage of the complete set of features! You can know the package temperature instantly. They use a temperature-sensitive colour coating.
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