EP2094498B1 - Composition chromogène contenant une pluralité de colorants d'antenne - Google Patents
Composition chromogène contenant une pluralité de colorants d'antenne Download PDFInfo
- Publication number
- EP2094498B1 EP2094498B1 EP06850322A EP06850322A EP2094498B1 EP 2094498 B1 EP2094498 B1 EP 2094498B1 EP 06850322 A EP06850322 A EP 06850322A EP 06850322 A EP06850322 A EP 06850322A EP 2094498 B1 EP2094498 B1 EP 2094498B1
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- European Patent Office
- Prior art keywords
- radiation
- phase
- coating
- dye
- absorbing dye
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/46—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography characterised by the light-to-heat converting means; characterised by the heat or radiation filtering or absorbing means or layers
- B41M5/465—Infrared radiation-absorbing materials, e.g. dyes, metals, silicates, C black
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/46—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography characterised by the light-to-heat converting means; characterised by the heat or radiation filtering or absorbing means or layers
Definitions
- compositions that produce a color change upon exposure to energy in the form of light or heat are of great interest in generating images on a variety of substrates.
- data storage media provide a convenient way to store large amounts of data in stable and mobile formats.
- optical discs such as compact discs (CDs), digital video disks (DVDs), or other discs allow a user to store relatively large amounts of data on a single relatively small medium.
- commercial labels were frequently printed onto optical discs by way of screen printing or other similar methods to aid in identification of the contents of the disk.
- optical disks used as storage mediums frequently have two sides: a data side configured to receive and store data and a label side.
- the label side is traditionally a background on which the user hand writes information to identify the disc.
- a radiation image-able coating includes a first phase including a radiation curable polymer matrix and an activator disposed in the radiation curable polymer matrix as well as a second phase insolubly distributed in the first phase, the second phase including a color-former, and a hybrid radiation absorbing dye package distributed in at least one of the first and second phase, wherein the hybrid antenna dye package includes at least a first radiation absorbing dye having a high extinction coefficient and a second radiation absorbing dye having a low extinction coefficient.
- a method for forming a radiation image-able coating includes preparing a radiation-curable polymer matrix including an acidic activator species, forming a low-melting eutectic of a leuco-dye phase, distributing the low-melting eutectic of a leuco-dye phase in the polymer matrix, and sensitizing the radiation image-able coating with a hybrid antenna dye package, the hybrid antenna dye package including at least a first antenna dye having a high extinction coefficient and a second antenna dye having a high extinction coefficient.
- FIG. 1 illustrates a schematic view of a media processing system according to one exemplary embodiment.
- FIG. 2 is a flowchart illustrating a method of forming an imageable composition according to one exemplary embodiment.
- FIG. 3 is a flowchart illustrating a method for forming a radiation image-able composition, according to one exemplary embodiment.
- FIG. 4 is a flow chart illustrating a method for forming a radiation image-able composition, according to one exemplary embodiment.
- FIG. 5 is a flow chart illustrating a method for forming an image on a radiation image-able coating, according to one exemplary embodiment.
- the present exemplary systems and methods provide for the preparation of a two-phase radiation image-able thermochromic coating having improved marking sensitivity and shelf-life reliability.
- a radiation-curable radiation imageable coating is described herein that can be imaged with a radiation generating device while exhibiting high marking sensitivity combined with relatively good shelf-life reliability.
- the present two-phase radiation image-able thermochromic coating has two or more antenna dyes dispersed and/or dissolved in various phases of the coating; a first of the two or more antenna dyes exhibits a high radiation absorbance due to a high extinction coefficient, and a second of the two or more antenna dyes exhibits a robust fade resistance and generally good stability, which very often comes at expense of significantly lower extinction coefficient. Further details of the present coating, as well as exemplary methods for forming the coatings on a desired substrate will be described in further detail below.
- radiation image-able discs is meant to be understood broadly as including, but in no way limited.to, audio, video, multi-media, and/or software disks that are machine readable in a CD and/or DVD drive, or the like.
- Non-limiting examples of radiation image-able disc formats include, writeable, recordable, and rewriteable disks such as DVD, DVD-R, DVD-RW, DVD+R, DVD+RW, DVD-RAM, CD, CD-ROM, CD-R, CD-RW, and the like.
- color refers to absorbance and reflectance properties that are preferably visible, including properties that result in black, white, or traditional color appearance.
- color or “colored” includes black, white, and traditional colors, as well as other visual properties, e.g., pearlescence, reflectivity, translucence, transparency, etc.
- FIG. 1 illustrates a schematic view of a media processing system (100), according to one exemplary embodiment.
- the illustrated media processing system (100) allows a user, among other things, to expose a radiation image-able surface with coatings of the present exemplary compositions, register an image on the coatings, and use the imaged object for a variety of purposes.
- a radiation image-able data storage medium may be inserted into the media processing system (100) to have data stored and/or a graphic image formed thereon.
- the present dual band radiation image-able thermochromic coating will be described in the context of coating an optical disk such as a compact disk (CD) or a digital video disk (DVD).
- an optical disk such as a compact disk (CD) or a digital video disk (DVD).
- the present dual band radiation image-able thermochromic coating may be applied to any number of desired substrates including, but in no way limited to, polymers, papers, metal, glass, ceramics, and the like.
- the media processing system (100) includes a housing (105) that houses a radiation generating device (110), which may be controllably coupled to a processor (125).
- the operation of the radiation generating device (110) may be controlled by the processor (125) and firmware (123) configured to selectively direct the operation of the radiation generating device.
- the exemplary media processing system (100) also includes hardware (not shown), such as spindles, motors, and the like, for placing a radiation image-able disc (130) in optical communication with the radiation generating device (110).
- the operation of the hardware (not shown) may also be controlled by firmware (123) accessible by the processor (125).
- the media processing system (100) includes a processor (125) having firmware (123) associated therewith. As shown, the processor (125) and firmware (123) are shown communicatively coupled to the radiation generating device (110), according to one exemplary embodiment.
- Exemplary processors (125) that may be associated with the present media processing system (100) may include, without limitation, a personal computer (PC), a personal digital assistant (PDA), an MP3 player, or other such device. According to one exemplary embodiment, any suitable processor may be used, including, but in no way limited to a processor configured to reside directly on the media processing system. Additionally, as graphically shown in FIG.
- the processor (125) may have firmware (123) such as software or other drivers associated therewith, configured to control the operation of the radiation generating device (110) to selectively apply radiation to the data storage medium (130).
- the firmware (123) configured to control the operation of the radiation generating device (110) may be stored on a data storage device (not shown) communicatively coupled to the processor (125) including, but in no way limited to, read only memory (ROM), random access memory (RAM), and the like.
- the processor (125) is configured to controllably interact with the radiation generating device (110). While FIG. 1 illustrates a single radiation generating device (110), any number of radiation generating devices may be incorporated in the media processing system (100).
- the radiation generating device (110) may include, but is in no way limited to a plurality of lasers configured for forming data on a CD and/or DVD, such as in a combo CD/DVD recording drive. More specifically, a combo CD/DVD recording drive configured to record on more than one type of media may be incorporated by the media processing system (100). For example, a DVD-R/RW (+/-) combo drive is also capable of recording CD-R/RW for example.
- combo CD/DVD recording drives include more than one laser.
- combo CD/DVD recording drives often contain 2 recording lasers: a first laser operating at approximately 780nm for CD recordings and a second laser operating at approximately 650nm for DVD recordings.
- the present media processing system (100) may include any number of lasers having wavelengths that may vary from between approximately 200 nm to approximately 1200 nm.
- the present media processing system (100) includes a data storage medium in the form of a radiation imageable disk (130) disposed adjacent to the radiation generating device (110).
- the exemplary radiation image-able disc (130) includes first (140) and second (150) opposing sides.
- the first side (140) has a data surface formed thereon configured to store data while the second side (150) includes a radiation image-able surface having a dual band color forming composition.
- the radiation generating device (110) may be configured to read existing data stored on the radiation image-able disk (130) and/or to store new data on the radiation image-able disc (130), as is well known in the art.
- data is meant to be understood broadly as including the non-graphic information digitally or otherwise embedded on a radiation image-able disc. According to the present exemplary embodiment, data can include, but is in no way limited to, audio information, video information, photographic information, software information, and the like. Alternatively, the term “data” may also be used herein to describe information such as instructions a computer or other processor may access to form a graphic display on a radiation image-able surface.
- the second side of the radiation image-able disk (140) includes a two-phase radiation image-able coating exhibiting improved marking sensitivity and shelf-life reliability compared to traditional image-able coatings.
- the second side of the radiation image-able disk (140) includes two separate phases: a first phase including a radiation-curable polymer matrix with an acidic activator species dissolved therein, and a second phase including a low-melting eutectic of a leuco-dye insoluble in the polymer matrix but uniformly distributed therein as a fine dispersion.
- two or more antenna dyes are dispersed and/or dissolved in the two phases of the coating. Further details of the radiation-curable radiation image-able coating exhibiting both marking sensitivity and good shelf-life reliability will be provided below.
- the second side of the radiation image-able disk (140) includes a number of components forming two separate phases configured to be imaged by one or more lasers emitting radiation at a known wavelength.
- the two separate phases forming the present coating formulation include, but are in no way limited to, a radiation-curable polymer matrix with acidic activator species dissolved therein and a low-melting eutectic of a leuco-dye insoluble in the matrix but uniformly distributed therein as a fine dispersion.
- the coating formulation is sensitized by the inclusion of a hybrid antenna dye package uniformly distributed/dissolved in at least one and preferably both phase(s) of the coating.
- the present hybrid antenna dye package includes at least two dyes, at least one dye having a high radiation absorbance due to a high extinction coefficient and at least a second dye having a robust fade resistance and generally good stability quite often associated with lower extinction coefficient.
- the present phases will be described in detail below.
- the first phase of the dual band radiation image-able thermochromic coating includes, but is in no way limited to, a radiation-curable polymer matrix with acidic activator species dissolved therein.
- the radiation curable pre-polymer in the form of monomers or oligomers, may be a lacquer configured to form a continuous phase, referred to herein as a matrix phase, when exposed to light having a specific wavelength.
- the radiation curable polymer may include, by way of example, UV-curable matrices such as acrylate derivatives, oligomers, and monomers, with a photo package.
- a photo package may include a light absorbing species, such as photoinitiators, which initiate reactions for curing of the lacquer, such as, by way of example, benzophenone derivatives.
- a light absorbing species such as photoinitiators
- photoinitiators for free radical polymerization monomers and oligomers include, but are not limited to, thioxanethone derivatives, anthraquinone derivatives, acetophenones, benzoine ethers, and the like.
- the radiation-curable polymer matrix phase may be chosen such that curing is initiated by a form of radiation that does not cause a color change of the color-former present in the coating, according to the present exemplary system and method.
- the radiation-curable polymer matrix may be chosen such that the above-mentioned photo package initiates reactions for curing of the lacquer when exposed to a light having a different wavelength than that of the leuco dyes.
- Matrices based on cationic polymerization resins may require photoinitiators based on aromatic diazonium salts, aromatic halonium salts, aromatic sulfonium salts and metallocene compounds.
- a suitable lacquer or matrix may also include Nor-Cote CLCDG-1250A (a mixture of UV curable acrylate monomers and oligomers) which contains a photoinitiator and organic solvent acrylates.
- Other suitable components for lacquers or matrices may include, but are not limited to, acrylated polyester oligomers, such as CN293 and CN294 as well as CN-292 (low viscosity polyester acrylate oligomer), trimethylolpropane triacrylate commercially known as SR-351, isodecyl acrylate commercially known as SR-395, and 2(2-ethoxyethoxy)ethyl acrylate commercially known as SR-256, all of which are commercially available from Sartomer Co.
- the acidic developers present in the radiation curable polymer matrix may include a phenolic species capable of developing color when reacting with a leuco dye and soluble or partially soluble in the coating matrix phase.
- Suitable developers for use with the present exemplary system and method include, but are in no way limited to, acidic phenolic compounds such as, for example, Bis-Phenol A, p-Hydroxy Benzyl Benzoate, Bisphenol S (4,4-Dihydroxydiphenyl Sulfone), 2,4-Dihydroxydiphenyl Sulfone, Bis(4-hydroxy-3-allylphenyl) sulfone (Trade name - TG-SA), 4-Hydroxyphenyl-4'-isopropoxyphenyl sulfone (Trade name - D8).
- the acidic developer may be either completely or at least partially dissolved in the UV-curable matrix.
- the second phase of the present two-phase radiation image-able thermochromic coating with improved marking sensitivity and shelf-life reliability is a color-former phase including, according to one exemplary embodiment, a leuco-dye and/or leuco-dye mixture, further referred to herein as a leuco-phase.
- the leuco-phase is present in the form of small particles dispersed uniformly in the exemplary coating formulation.
- the leuco-phase includes leuco-dye or mixture of leuco-dye with a melting aid configured to form a lower melting eutectic with the leuco-dye.
- the second phase of the present radiation curable polymer matrix may include other color forming dyes such as photochromic dyes.
- the present two-phase radiation image-able thermochromic coating may have any number of leuco dyes including, but in no way limited to, fluorans, phthalides, amino-triarylmethanes, aminoxanthenes, aminothioxanthenes, amino-9,10-dihydro-acridines, aminophenoxazines, aminophenothiazines; aminodihydro-phenazines, aminodiphenylmethanes, aminohydrocinnamic acids (cyanoethanes, leuco methines) and corresponding esters, 2(phydroxyphenyl)-4,5-diphenylimidazoles, indanones, leuco indamines, hydrozines, leuco indigoid dyes, amino-2,3-dihydroanthraquinones, tetrahalop, p'-biphenols, 2(p-hydroxyphenyl)-4,5-diphenylimidazoles,
- leuco dyes
- the leuco dye can be a fluoran, phthalide, aminotriarylmethane, or mixture thereof.
- suitable fluoran based leuco dyes include, but are in no way limited to, 3-diethylamino- 6-methyl-7-anilinofluorane, 3-(N-ethyl-p-toluidino)-6-methyl-7-anilinofluorane, 3-(N-ethyl-N-isoamylamino)-6-methyl-7-anilinofluorane, 3-diethylamino-6- methyl-7-(o,p-dimethylanilino)fluorane, 3-pyrrolidino-6-methyl-7-anilinofluorane, 3-piperidino-6-methyl-7-anilinofluorane, 3-(N-cyclohexyl-Nmethylamino)-6-methyl-7-anilinofluorane,
- Aminotriarylmethane leuco dyes can also be used in the present invention such as tris(N,N-dimethylaminophenyl) methane (LCV); tris(N,N-diethylaminophenyl) methane(LECV); tris (N,N-di-n-propylaminophenyl) methane (LPCV); tris(N,N -dinbutylaminophenyl) methane (LBCV); bis(4-diethylaminophenyl)-(4-diethylamino-2-methyl-phenyl) methane (LV-1); bis(4-diethylamino-2-methylphenyl)-(4-diethylamino-phenyl) methane (LV-2); tris(4-diethylamino-2-methylphenyl) methane (LV-3); bis(4-diethylamino-2-methylphenyl)(3,4-dimethoxyphen
- leuco dyes can also be used in connection with the present exemplary systems and methods and are known to those skilled in the art. A more detailed discussion of appropriate leuco dyes may be found in U.S. Patent Nos. 3,658,543 and 6,251,571 , each of which are hereby incorporated by reference in their entireties. Additionally examples may be found in Chemistry and Applications of Leuco Dyes, Muthyala, Ramaiha, ed.; Plenum Press, New York, London; ISBN: 0-306-45459-9 , incorporated herein by reference.
- a number of melting aids may be included with the above-mentioned leuco dyes.
- the melting aids may include, but are in no way limited to, crystalline organic solids with melting temperatures in the range of approximately 50°C to approximately 150°C, and preferably having melting temperature in the range of about 70°C to about 120°C.
- the above-mentioned melting aid may also assist in reducing the melting temperature of the leuco-dye and stabilize the leuco-dye mixture in the amorphous state, or slow down the re-crystallization of the leucodye mixture into individual components.
- Suitable melting aids include, but are in no way limited to, aromatic hydrocarbons (or their derivatives) that provide good solvent characteristics for leuco-dye and antenna dyes used in the present exemplary systems and methods.
- suitable melting aids for use in the current exemplary systems and methods include, but are not limited to, m-terphenyl, pbenzyl biphenyl, alpha-naphtol benzylether, 1,2[bis(3,4]dimethylphenyl)ethane.
- the percent of leuco dyes or other color-former and melting aid can be adjusted to minimize the melting temperature of the color-former phase without interfering with the development properties of the leuco dye.
- the melting aid can comprise from approximately 2 wt% to approximately 25 wt% of the color-former phase.
- the above-mentioned leuco-phase is uniformly dispersed or distributed in the matrix phase as a separate phase.
- the leuco phase is practically insoluble in matrix phase. Consequently, the leuco-dye and the acidic developer component of the matrix phase are contained in the separate phases and can not react with color formation at ambient temperature.
- both phases melt and mix. Once mixed together, color is developed due to a reaction between the fluoran leuco dye and the acidic developer.
- proton transfer from the developer opens a lactone ring of the leuco-dye, resulting in an extension of conjugate double bond system and color formation.
- the formation of the color is further controlled and facilitated by sensitizing the various phases of the resulting coating to a known radiation emission wavelength via the use of a plurality of antenna dyes, thereby providing maximum heating efficiency.
- the antenna dyes comprise a number of radiation absorbers configured to optimize development of the color forming composition upon exposure to radiation at a predetermined exposure time, energy level, wavelength, etc. More specifically, the radiation absorbing antenna dyes may act as an energy antenna providing energy to surrounding areas of the resulting coating upon interaction with an energy source of a known wavelength. Once energy is received by the radiation absorbing antenna dyes, the radiation is converted to heat to melt portions of the coating and selectively induce image formation.
- radiation absorbing dyes have varying absorption ranges and varying absorbency maximums where the antenna dye will provide energy most efficiently from a radiation source.
- a radiation antenna that has a maximum light absorption at or in the vicinity of a desired development wavelength may be suitable for use in the present system and method.
- matching the radiation absorbing energy antenna to the radiation wavelengths and intensities of the first and second radiation generating devices can optimize the image formation system.
- Optimizing the system includes a process of selecting components of the color forming composition that can result in a rapidly developable composition under a fixed period of exposure to radiation at a specified power.
- the present two-phase radiation image-able coating having improved marking sensitivity and shelf-life reliability includes a hybrid antenna package uniformly distributed/dissolved in at least one and preferably both phase(s) of the coating including two or more antenna dyes that may be divided into two groups.
- the two or more antenna dyes included in the present hybrid antenna package may be selected from a number of radiation absorbers such as, but not limited to, aluminum quinoline complexes, porphyrins, porphins, indocyanine dyes, phenoxazine derivatives, phthalocyanine dyes, polymethyl indolium dyes, polymethine dyes, guaiazulenyl dyes, croconium dyes, polymethine indolium dyes, metal complex IR dyes, cyanine dyes, squarylium dyes, chalcogeno-pyryloarylidene dyes, indolizine dyes, pyrylium dyes, quinoid dyes, quinone dyes, azo dyes, and mixtures or derivatives thereof.
- radiation absorbers such as, but not limited to, aluminum quinoline complexes, porphyrins, porphins, indocyanine dyes, phenoxazine derivatives, phthal
- antennas can also be used in the present exemplary system and method and are known to those skilled in the art and can be found in such references as " Infrared Absorbing Dyes", Matsuoka, Masaru, ed., Plenum Press, New York, 1990 (ISBN 0-306-43478-4) and " Near-Infrared Dyes for High Technology Applications”, Daehne, Resch-Genger, Wolfbeis, Kluwer Academic Publishers (ISBN 0-7923-5101-0 ), both incorporated herein by reference.
- the two or more antenna dyes included in the present hybrid antenna package may be separated into a high sensitivity/lower stability dye group or a lower sensitivity/high stability dye group.
- the antenna dyes may be classified as either high sensitivity or low sensitivity according to the extinction coefficient of the antenna dye.
- the term high sensitivity/lower stability dye shall be understood to mean an antenna dye having an extinction coefficient greater than approximately 100000 L Mol -1 Cm -1 .
- the term low sensitivity/higher stability dye shall be understood to mean an antenna dye having an extinction coefficient less than approximately 100000 L Mol -1 Cm -1 .
- the antenna dyes of the hybrid antenna package have absorbance maximums approximately matching the wavelength of the radiation generating device (110).
- the media processing system (100) may include a radiation generating device configured to produce one or more lasers with wavelength values of approximately 650nm, approximately 780nm, and/or approximately 300 nm to approximately 600 nm. By matching the wavelength values of the radiation generating device(s) (110), image formation is maximized.
- antenna dyes of cyanine and porphyrin typically exhibit high sensitivity/lower stability radiation characteristics while naphthalocyanines typically exhibit low sensitivity/higher stability characteristics.
- high sensitivity/lower stability radiation absorbing antenna dyes having absorbance maximums at approximately 780nm that may be incorporated into the present antenna dye package include, but are in no way limited to, many indocyanine IR-dyes such as IR780 iodide (Aldrich 42,531-1) (1) (3H-Indolium, 2-[2-[2-chloro-3-[(1,3-dihydro-3,3-dimethyl-1-propyl-2H-indol-2-ylidene)ethylidene]-1-cyclohexen-1-yl]ethenyl]-3,3-dimethyl-1-propyl-, iodide (9Cl)), IR783 (Aldrich 54,329-2) (2) (2-[2-[2-Chloro-3-[2-[1,3-dihydro-3,3-dimethyl-1-(4-sulfobutyl)-2Hindol-2-yliden
- high sensitivity/lower stability radiation absorbing antenna dyes having absorbance maximums at approximately 650nm that may be incorporated into the present antenna dye package include, but are in no way limited to, many indolium of phenoxazine dyes and cyanine dyes such as cyanine dye CS172491-72-4. Additionally, low sensitivity/higher stability dyes having absorbance maximums at approximately 650nm may be used including, but in no way limited to many commercially available phthalocyanine dyes such as pigment blue 15.
- Radiation antennae which can be incorporated into the present antenna dye package according to their extinction coefficient for optimization in the blue ( ⁇ 405nm) and indigo wavelengths can include, but are in no way limited to, aluminum quinoline complexes, porphyrins, porphins, and mixtures or derivatives thereof.
- Non-limiting specific examples of suitable aluminum quinoline complexes can include tris(8-hydroxyquinolinato)aluminum (CAS 2085-33-8), and derivatives such as tris(5-cholor-8-hydroxyquinolinato)aluminum (CAS 4154-66-1), 2-(4-(1-methyl-ethyl)-phenyl)-6-phenyl-4H-thiopyran-4-ylidene)-propanedinitril-1,1-dioxide (CAS 174493-15-3), 4,4'-[1,4-phenylenebis(1,3,4-oxadiazole-5,2-diyl)]bis N,N-diphenyl benzeneamine (CAS 184101-38-0), bis-tetraethylammonium-bis(1,2-dicyano-dithiolto)-zinc(II) (CAS 21312-70-9), 2-(4,5-dihydronaphtho[1,2-d]-1,3-di
- Non-limiting examples of specific porphyrin and porphyrin derivatives can include etioporphyrin 1 (CAS 448-71-5), deuteroporphyrin IX 2,4 bis ethylene glycol (D630-9) available from Frontier Scientific, and octaethyl porphrin (CAS 2683-82-1), azo dyes such as Mordant Orange (CAS 2243-76-7), Merthyl Yellow (CAS 60-11-7), 4-phenylazoaniline (CAS 60-09-3), Alcian Yellow (CAS 61968-76-1), available from Aldrich chemical company, and mixtures thereof. Exemplary methods of forming the above-mentioned coating, as well as methods for forming images on the coating are described in further detail below.
- FIG. 2 is a flowchart illustrating a method of forming the present two-phase radiation image-able thermochromic coating, according to one exemplary embodiment.
- a method of forming the image-able thermochromic coating includes preparing the radiation-curable polymer matrix with an acidic activator species dissolved therein (step 200), preparing a low-melting eutectic of a leuco-dye (step 210), and evenly distributing the low-melting eutectic of a leuco-dye in the radiation curable polymer matrix (step 220). Further details of the exemplary coating forming method will now be described in further detail below with reference to FIGS. 3 and 4 .
- a first step of the present exemplary coating formation method includes preparing the radiation-curable polymer matrix with an acidic activator species therein (step 200).
- FIG. 3 further illustrates an exemplary method for preparing the radiation-curable polymer matrix, according to one exemplary embodiment.
- the radiation-curable polymer matrix may be prepared by first melting the acidic, proton-donating activator species together (step 300).
- multiple activators can be used, e.g., multiple activator systems having coequal performance values to systems having a primary activator and secondary activator(s).
- the present exemplary method includes the step of melting the activators together to accelerate dissolution of activator species that may exhibit poor solubility in the radiation curable polymer
- the step of melting the activators together is optional. Rather, in many cases, the activators may be directly dissolved in the radiation-curable polymer without preliminary melting.
- the melted activators are added to the radiation-curable polymer (step 310).
- the proton-donating activator species are dissolved into the radiation-curable polymer. Dissolution of the proton-donating activator species may be facilitated by the introduction of agitation into the radiation-curable polymer. Dissolution of the proton-donating activator species in the radiation-curable polymer (step 310) will provide for a substantially even distribution of the activators throughout the polymer.
- the above-mentioned hybrid antenna package may be introduced to the two phases of the present exemplary coating according to three different methodologies.
- the antenna dyes with very high laser radiation absorbance (extinction coefficient) and, typically, not very good photo-stability may be dissolved/uniformly distributed in the coating polymer matrix phase.
- antenna dyes with lower laser radiation absorbance(extinction coefficient) but good photo-stability forming the second component of the hybrid antenna dye package may be dissolved/uniformly distributed in the leuco-dye phase.
- the antenna dyes of the hybrid antenna package may be distributed with the antenna dyes with very high laser radiation absorbance (extinction coefficient) and, typically, not very good photo-stability dissolved/uniformly distributed in the leuco-dye phase.
- the antenna dyes with lower laser radiation absorbance (extinction coefficient) but good photo-stability may be dissolved/uniformly distributed in the coating polymer matrix phase.
- the antenna dyes of both antenna dye groups may be uniformly distributed and/or dissolved in both phases of the thermochromic coating. Regardless of the antenna dye distribution, the selected antenna dyes may be selected as having absorbance maximums associated with the wavelength(s) of the radiation generating device(s) (110). According to one exemplary embodiment, the antenna dyes are dissolved into the various phases to provide a substantially even distribution thereof.
- the leuco dye phase is formed by first providing the color-former (step 400).
- the color-former may include, but is in no way limited to, leuco-dye and/or leco-dye mixture.
- the term "color-former" refers to any composition that changes color upon application of energy. Color-formers may include, but are in no way limited to, leuco dyes, photochromic dyes, or the like.
- the color-former may include leuco dyes, such as fluoran, isobenzofuran, and phthalide-type leuco dyes.
- leuco dyes such as fluoran, isobenzofuran, and phthalide-type leuco dyes.
- the term "color-former" does not infer that color is generated from scratch, as it includes materials that can change in color, as well as materials that can become colored from a colorless or more transparent state or a different color.
- the resulting molten mixture may be referred to as a molten color-former phase.
- a melting aid may be combined with the above-mentioned color-former (step 410).
- the melting aid may be a crystalline organic solid melted with the color-former, according to one exemplary embodiment.
- Melting aids are typically crystalline organic solids that can be melted and mixed with a particular color-former.
- most color-formers are also available as a solid particulate that is soluble in standard liquid solvents.
- the color-former and melting aid can be mixed and heated to form a molten mixture.
- a color-former phase of color-former and melting aid is formed that can then be ground into a powder.
- one or more radiation absorbing dyes may also be mixed with the color-former (step 420), according to one exemplary embodiment.
- the radiation absorbing dyes that are mixed with the color-former may be selected based on the wavelength or range of wavelengths produced by the radiation generating device(s).
- the radiation absorbing dyes that are mixed with the color-former may be mixed according to one of three different embodiments.
- the antenna dyes with very high laser radiation absorbance (extinction coefficient) and, typically, not very good photo-stability may be dissolved/uniformly distributed in the coating polymer matrix phase and the antenna dyes with lower laser radiation absorbance (extinction coefficient) but good photo-stability forming the second component of the hybrid antenna dye package may be dissolved/uniformly distributed in the leuco-dye phase.
- the antenna dyes of both antenna dye groups are uniformly distributed and/or dissolved in both phases of the thermochromic coating. While the present exemplary method includes a plurality of radiation absorbing dyes in each of the two phases, it will be appreciated that the radiation absorbing antenna dyes can be present in either or both of the various phases.
- the molten low-melting eutectic of the leuco dye phase is allowed to cool and the particle size of the low-melting eutectic of the leuco dye phase is reduced (step 430).
- the particle size of the low-melting eutectic of the leuco dye phase may be reduced by any number of known methods including, but in no way limited to, milling and/or grinding.
- the low melting eutectic is distributed in the polymer matrix (step 220).
- the low-melting eutectic of the leuco-dye phase may be distributed in the polymer with the aid of continuous agitation during introduction of the low melting eutectic in the polymer matrix.
- the two-phase radiation image-able thermochromic coating When the two-phase radiation image-able thermochromic coating is formed as described above, it may be applied to any number of desired substrates including, but in no way limited to, polymer, paper, ceramic, glass, metal, and the like. According to one exemplary embodiment, the dual band radiation image-able thermochromic coating may be applied to a desired substrate using any number of known coating systems and methods including, but in no way limited to, doctor blade coating, gravure coating, reverse roll coating, meyer rod coating, extrusion coating, curtain coating, air knife coating, and the like.
- FIG. 5 illustrates one exemplary method for forming a desired image on the second side (150) of the radiation image-able disk (130), according to one exemplary embodiment.
- the image formation method begins by first generating the desired image (step 500).
- generating the desired image may include forming a graphical representation of the desired image using any number of user interfaces and converting the graphical representation into a number of machine controllable commands using the firmware (123; FIG. 1 ) and/or the processor (125; FIG. 1 ) of the media processing system (100; FIG. 1 ).
- the radiation image-able disk may then be placed adjacent to the radiation generating device(s) (110; FIG. 1 ) with the radiation image-able coating in optical communication with the radiation generating device(s) (step 510). With the radiation image-able coating in optical communication with the radiation generating device(s) (step 510), the radiation image-able coating may then be selectively exposed to the radiation generating device(s) to form the desired image (step 520).
- the two-phase radiation image-able thermochromic coating made with the above-mentioned hybrid antenna package exhibits improved marking sensitivity and shelf-life reliability when compared to traditional image-able thermochromic coatings. More specifically, the present two-phase radiation exhibits a high marking sensitivity once formed due to the presence of the high extinction coefficient/lower stability antenna dye. Additionally, due to the presence of the lower extinction coefficient/higher stability antenna dye, sufficient marking sensitivity may be maintained in the coating even after exposure to ambient light for long periods of time.
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
- Paints Or Removers (AREA)
- Ink Jet (AREA)
- Macromonomer-Based Addition Polymer (AREA)
Claims (15)
- Revêtement capable de former une image par rayonnement, comprenant :- une première phase comprenant une matrice polymère durcissable par rayonnement et un activateur disposé dans ladite matrice polymère durcissable par rayonnement ;- une seconde phase distribuée de façon insoluble dans ladite première phase, ladite seconde phase contenant un chromogène ; et- un ensemble hybride de colorants absorbant le rayonnement distribué dans au moins l'une desdites première et seconde phases, ledit ensemble hybride de colorants absorbant le rayonnement comprenant au moins un premier colorant absorbant le rayonnement ayant un coefficient d'extinction élevé et un second colorant absorbant le rayonnement ayant un faible coefficient d'extinction, inférieur au coefficient d'extinction élevé.
- Revêtement selon la revendication 1, dans lequel ledit ensemble de colorants absorbant le rayonnement est distribué à la fois dans ladite première phase et ladite seconde phase.
- Revêtement selon la revendication 1, dans lequel ledit chromogène comprend un eutectique à bas point de fusion d'un mélange de leuco-colorant comprenant un auxiliaire de fusion configuré pour former un eutectique à point de fusion inférieur avec le leuco-colorant.
- . Revêtement selon la revendication 1, dans lequel à la fois ledit premier colorant absorbant le rayonnement et ledit second colorant absorbant le rayonnement dudit ensemble hybride de colorants absorbant le rayonnement ont une longueur d'onde maximale d'absorbance comprenant l'une parmi approximativement 780 nm, approximativement 650 nm ou approximativement 405 nm.
- Revêtement selon la revendication 1, dans lequel : ledit premier colorant absorbant le rayonnement a un coefficient d'extinction supérieur à approximativement 100000 LM1cm-1 ; et ledit second colorant absorbant le rayonnement a un coefficient d'extinction inférieur à approximativement 100000 LM-1cm-1.
- Revêtement selon la revendication 1, dans lequel ledit activateur comprend une espèce d'activateur acide dissoute dans ladite première phase.
- Revêtement selon la revendication 1, dans lequel ladite seconde phase comprend une dispersion à l'intérieur de ladite première phase.
- Revêtement selon la revendication 1, dans lequel ladite seconde phase comprend en outre un auxiliaire de fusion configuré pour diminuer la température de fusion dudit eutectique.
- Procédé de formation d'un revêtement capable de former une image par rayonnement comprenant :- la préparation d'une matrice polymère durcissable par rayonnement comprenant une espèce d'activateur acide ;- la formation d'un eutectique à bas point de fusion d'une phase de leuco-colorant comprenant un auxiliaire de fusion configuré pour former un eutectique à point de fusion inférieur avec le leuco-colorant ;- la distribution dudit eutectique à bas point de fusion d'une phase de leuco-colorant dans ladite matrice polymère ; et- la sensibilisation dudit revêtement capable de former une image par rayonnement avec un ensemble hybride de colorants absorbant le rayonnement, ledit ensemble hybride de colorants absorbant le rayonnement comprenant au moins un premier colorant absorbant le rayonnement ayant un coefficient d'extinction élevé et un second colorant absorbant le rayonnement ayant un faible coefficient d'extinction, inférieur au coefficient d'extinction élevé.
- Procédé selon la revendication 9, dans lequel ladite sensibilisation dudit revêtement capable de former une image par rayonnement avec un ensemble hybride de colorants absorbant le rayonnement comprend en outre la distribution dudit ensemble hybride de colorants absorbant le rayonnement dans ladite matrice polymère durcissable par rayonnement.
- Procédé selon la revendication 9, dans lequel ladite sensibilisation dudit revêtement capable de former une image par rayonnement avec un ensemble hybride de colorants absorbant le rayonnement comprend en outre la distribution dudit ensemble de colorants absorbant le rayonnement dans ledit eutectique à bas point de fusion d'une phase de leuco-colorant.
- Procédé selon la revendication 9, dans lequel ladite préparation d'une matrice polymère durcissable par rayonnement comprenant une espèce d'activateur acide comprend :- la fusion de plusieurs espèces d'activateur acide ; et- l'addition desdits activateurs fondus à un polymère durcissable par rayonnement.
- Procédé selon la revendication 9, dans lequel ladite formation d'un eutectique à bas point de fusion d'une phase de leuco-colorant comprend :- la fourniture d'un chromogène ;- la combinaison d'un auxiliaire de fusion avec ledit chromogène.
- Procédé de formation d'une image sur un substrat (130)., comprenant:- la formation d'un revêtement capable de former une image par rayonnement selon la revendication 1 sur un substrat désiré (130) ; et- l'exposition sélective dudit revêtement capable de former une image par rayonnement à au moins une source de rayonnement, ladite source de rayonnement ayant une longueur d'onde associée à une longueur d'onde maximale d'absorbance dudit ensemble hybride de colorants absorbant le rayonnement.
- Système de formation d'une image sur un substrat (130), comprenant :- un dispositif générant un rayonnement configuré pour générer un rayonnement ayant une première longueur d'onde ;- un substrat (130) disposé de façon adjacente audit dispositif générant un rayonnement ; et- un revêtement capable de former une image par rayonnement selon la revendication 1, disposé sur ledit substrat (130).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2006/062322 WO2008076132A1 (fr) | 2006-12-19 | 2006-12-19 | Composition chromogène contenant une pluralité de colorants d'antenne |
Publications (2)
Publication Number | Publication Date |
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EP2094498A1 EP2094498A1 (fr) | 2009-09-02 |
EP2094498B1 true EP2094498B1 (fr) | 2012-04-04 |
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ID=38420679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP06850322A Not-in-force EP2094498B1 (fr) | 2006-12-19 | 2006-12-19 | Composition chromogène contenant une pluralité de colorants d'antenne |
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EP (1) | EP2094498B1 (fr) |
CN (1) | CN101563235B (fr) |
AT (1) | ATE552121T1 (fr) |
WO (1) | WO2008076132A1 (fr) |
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Publication number | Priority date | Publication date | Assignee | Title |
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US8506695B2 (en) * | 2006-10-25 | 2013-08-13 | Hewlett-Packard Development Company, L.P. | Coating compositions |
WO2013142662A2 (fr) | 2012-03-23 | 2013-09-26 | Corning Mobile Access Ltd. | Puce(s) de circuit intégré à radiofréquence (rfic) servant à fournir des fonctionnalités de système d'antenne à répartition, et composants, systèmes, et procédés connexes |
Family Cites Families (6)
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US5409797A (en) * | 1991-03-04 | 1995-04-25 | Fuji Photo Film Co., Ltd. | Heat-sensitive recording material for laser recording |
JP2732328B2 (ja) * | 1992-03-06 | 1998-03-30 | 富士写真フイルム株式会社 | 赤外レーザー用感熱記録材料 |
US6265344B1 (en) * | 1998-10-16 | 2001-07-24 | Ricoh Company, Ltd. | Transparent thermosensitive recording material |
US7060654B2 (en) * | 2003-10-28 | 2006-06-13 | Hewlett-Packard Development Company | Imaging media and materials used therein |
EP1585638A1 (fr) * | 2003-01-24 | 2005-10-19 | Hewlett-Packard Development Company, L.P. | Systeme d'etiquetage de substrats et procede d'etiquetage de disques optiques |
US6974661B2 (en) * | 2003-01-24 | 2005-12-13 | Hewlett-Packard Development Company, L.P. | Compositions, systems, and methods for imaging |
-
2006
- 2006-12-19 WO PCT/US2006/062322 patent/WO2008076132A1/fr active Application Filing
- 2006-12-19 EP EP06850322A patent/EP2094498B1/fr not_active Not-in-force
- 2006-12-19 AT AT06850322T patent/ATE552121T1/de active
- 2006-12-19 CN CN2006800567241A patent/CN101563235B/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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CN101563235B (zh) | 2011-07-06 |
CN101563235A (zh) | 2009-10-21 |
ATE552121T1 (de) | 2012-04-15 |
WO2008076132A1 (fr) | 2008-06-26 |
EP2094498A1 (fr) | 2009-09-02 |
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