MXPA97004945A - Ink compositions for hot fusion based on oxazole - Google Patents

Abstract

The present invention relates to an ink composition consisting of a dye and a vehicle component, this vehicle component is constituted by the condensation product of an organic acid and an amino alcohol

Description

INK COMPOSITIONS FOR HOT FUSION BASED PS QX? ZQLIN? PENDING APPLICATIONS Hot melt inks for printing with acoustic injection, are illustrated in the Co-pending Patent Applications of the U.S.A. Serial No. 624,154; Patent Application of the U.S.A. Non-Series 624,273 and U.S. Patent Application Ser. Serial No. 641,866, the descriptions of each of the applications are fully incorporated by reference. BACKGROUND OF THE INVENTION The present invention is directed to ink compositions and more specifically, the present invention relates to hot melt inks especially useful for acoustic printing of ink, processes, apparatus, with reference for example to U.S. Pat. No. 5, m, 141; Patent of the U.S.A. No. 5,121,220; Patent of the U.S.A. No. 5,128,726; Patent of the U.S.A. No. 5,371,531 and U.S. Patent Application. Serial No. 176,381, the descriptions of which are hereby fully incorporated by reference, including especially acoustic ink processes, as illustrated in some of the copending applications and patents mentioned above, such as an acoustic ink printer for printing images in a recording medium. REF: 24711 More specifically, the present invention is directed to compositions of hot melt acoustic inks, where excellent images revealed with acceptable image permanence can be generated with these inks, excellent projection efficiency in transparencies, with a subsequent merging stage. and excellent resistance to folding, resistance to displacement of boom, no mud, high efficiency of projection, and where the inks have acceptable and in modalities, superior resistance to light and superior resistance to water. Still further, in embodiments of the present invention the elimination or minimization of undesirable paper kinking is allowed since no water is present, or very small amounts thereof are chosen, in the inks of the invention, and it is preferred that they are absent. of water, and since water is not present in the inks, a dryer can be avoided, thus minimizing the cost and complexity of the apparatus and process of acoustic ink injection. The inks of the present invention in embodiments thereof are constituted by a colorant and a vehicle derived from the condensation product of an organic acid and an amino alcohol with the optional presence of a polycondensation catalyst, and this condensation reaction is achieved at elevated temperature, such as from about 150 to about 180 * C. The ink vehicle of the invention possesses, for example, suitable viscosities, for example from about 25 to about 5 centipoises at convenient temperatures, for example from about 120 to about 150 ° C, acceptable acoustic loss and improved hardness or penetration. The aforementioned carrier is constituted in embodiments of the reaction product of an organic acid and an amino alcohol, such as an oxazoline, amide and / or amino ester as illustrated herein, reference for example formula 1, and wherein Rx is an aliphatic group , for example alkyl of 1 to about 55 carbon atoms such as ethyl, propium, butyl, hexyl, stearyl and the like, R2, Rj, R, and R, are an aliphatic group, for example alkyl from 1 to 55, such as ethyl, propyl, butyl, hexyl, stearyl or alkylene ester, such as ethylene acetate or methylene stearate, or an alcohol of about 2 to about 6 carbon atoms, such as methanol, ethanol, propanol and the like. The main product of the aforesaid condensation is considered to be an oxazoline or benzoxazoline illustrated for example by the formulas or structures I and the, respectively and present in the ink in an effective amount of about 65 to about 100% by weight of the product of condensation, and preferably about 85 to about 100% of the condensation product. The minor constituents of the condensation product are an amide, as illustrated by structure II or ai or amino ester as illustrated by structure III, or their mixtures present in the product in amounts of about 0 to about 35 wt%, preferably about 0 to about 15% by weight of the condensation product. With mixtures of about 1 to about 99% by weight 0 part of the amide and from about 99 to about 1% by weight or part of the amino ester, are present in modalities.

(I Ha OR R «R5 2« i ^ O ^^ lt,; NH] III In acoustic ink printing, the print head produces droplets of approximately 2.2 picoliters by a process of energy, acoustics. The ink under these conditions preferably should exhibit a function viscosity of about 5 to about 25 centipoise or less at the ink jet temperature. In addition, once the ink is injected onto the paper, the ink image must have excellent folding properties, and excellent properties without boom displacement, and must be firm to the water without smearing, of excellent transparency and excellent fixing qualities. . To choose an ink in these applications, it is desirable that the vehicle exhibit a low melt viscosity, such as about 1 centipoise about 20 centipoise in the acoustic head, while also exhibiting solid type properties after being ejected onto the paper. Since the acoustic head can effectively tolerate a temperature of up to about 180 ° C, and preferably up to a temperature of about 142 ° C to about 160 ° C, the vehicle for the ink, preferably will exhibit liquid-like properties, such as a viscosity of 1 to about 10 centipoise at a temperature of about 110 ° C to about 165 ° C, and solidifying or hardening after injection onto the paper, such that the ink exhibits a hardness value of about .1 to approximately .5 millimeter, using a penetrometer according to the penetration method ASTM D1321.

Inkjet printing processes employing inks that are solid at room temperature and liquid at elevated temperatures are known. For example, Patent of the U.S.A. No. 4,490,731, the disclosure of which is hereby incorporated by reference, describes an apparatus for supplying certain solid inks for printing on a substrate such as paper. The ink coloring vehicle is chosen to have a melting point above ambient temperature such that the ink, which melts in the apparatus, will not be subject to evaporation or spillage during periods without printing. The selected vehicle has a low temperature to allow the use of solid ink in a thermal ink printing printer. In the thermal inkjet printing process employing hot melt inks, the solid ink is fused by a heater in the printing apparatus and used as a liquid in a manner similar to that of a thermal inkjet print conventional. Upon contact, with the printing substrate, the molten ink solidifies rapidly allowing the dye to remain on the surface instead of being transported to the paper by capillary action, thus trying to allow higher printing density that is generally obtained with liquid inks. Hot melt ink injections are somewhat similar to thermal ink injections, however a hot melt ink does not contain solvents. Thus, instead of being a liquid at room temperature, a hot melt ink is typically a solid or semi-solid having a wax-like consistency. These inks usually require heating, for example at about 100 ° C before the ink melts and becomes a liquid. With hot melt inks, a plurality of ink jet nozzles are provided in a print head. A piezoelectric vibrating element is located in each ink channel upstream of a nozzle, such that electric piezo oscillations drive the ink through the nozzle. After the hot melt ink is applied to the substrate, the ink it re-solidifies when freezing in the substrate. Each of these types of known ink injections however has a number of advantages and disadvantages. One advantage of thermal ink injections is its compact design for the integrated electronic components section of the print head. Thermal ink injections are disadvantageous since the thermal ink has a tendency to soak in a simple paper medium. This makes the print blurred or the print is thin locally, adversely affecting the print quality. Problems with thermal inkjet have been encountered when attempting to release the moisture ink fast enough so that the ink is not impregnated on a simple paper medium. This is particularly true when printing with color. Therefore, usually when printing with thermal ink, it is necessary to use coated papers, which are more expensive than plain paper. One advantage of a hot melt inkjet is the ability to print on plain paper since the hot melt ink solidifies rapidly as it cools since it is waxy in nature, usually not impregnated in a paper medium. However, the injection of hot melt ink can be problematic in structure and design, that is, the associated integrated electronic components of a thermal ink jet head are considerably more compact than those of an ink jet head. hot fusion. In addition, the U.S. Patent. No. 4,751,528, the disclosure of which is hereby incorporated by reference, illustrates a hot melt ink jet system that includes a temperature controlled platen, which is provided with a heater and a thermoelectric cooler electrically connected to a pump thermal and a temperature control unit to control the operation of the heater and the thermal pump to maintain the temperature of the stage at a desired level. The apparatus also includes a second thermoelectric cooler for solidifying hot melt ink in a selected area more quickly to avoid displacement by a main roll coming into contact with the surface of the substrate to which the hot melt ink has been applied. An air-tight enclosure surrounding the platen is connected to a vacuum pump and has slots adjacent to the platen to hold the substrate in thermal contact with the platen. In addition, the U.S. Patent. No. 4,791,439, the disclosure of which is hereby incorporated by reference, discloses an apparatus for use with hot melt inks having an ink tank head and ink jet system connected integrally, the deposit system includes a conductive plate Highly efficient thermal insert inside a non-thermally conductive reservoir housing. The reservoir system has a sloping flow path between an inlet position and a manifold from which ink is drawn to the head, and includes a plurality of vanes located on the plate for rapid thermal transfer. The U.S. Patent No. 5,006,170, and U.S. Pat. No. 5,122,187, the descriptions of which are all fully incorporated herein by reference, disclose hot melt ink compositions suitable for inkjet printing, comprising a colorant, a binder and a propellant such as hydrazine, amines cyclics, ureas, carboxylic acids, sulfonic acids, aldehydes, ketones, hydrocarbons, esters, phenols, amides, imides, halocarbons and the like. The inks of the present invention are different from the aforementioned patents '179 and' 187, since for example the vehicle of the selected invention exhibits a viscosity of about 1 to about 20, and preferably 5 centipoise when heated at a temperature from about 120 ° C to about 165 ° C, such that the acoustic energy in the print head can eject a droplet of ink onto the paper. Additionally, the vehicle of the present invention exhibits softening points from about 50 * C to about 100 ° C and the vehicles of the invention, especially oxazoline derivatives are not described in this prior art. The U.S. Patent No. 5,041,161, the description of which is fully incorporated herein by reference, describes an ink for injection, which is semi-solid at room temperature. The ink combines the advantageous properties of thermal phase inks and liquid inks. The inks comprise carriers such as glyceryl esters, polyoxyethylene esters, waxes, fatty acids and mixtures thereof, which are seraisolides at temperatures between 20 * C and 45 * C. The ink is ejected by injection at high temperature in the range of about 45 ° C to about 110 ° C, at that temperature the ink has a speed of about 10 to about 15 centipoises. The inks also contain 0.1 to 30% by weight of a coloring system. The U.S. Patent No. 4,853,036 and the U.S. Patent. No. 5,124,718, the descriptions of each of which are hereby incorporated by reference, describe an inkjet recording ink comprising a liquid composition essentially consisting of a coloring matter, a volatile solvent having a vapor pressure of one millimeter of Hg or more at 25 ° C, and a material that is solid at room temperature and has a molecular weight of 300 or more, and prepares to satisfy the formula BÍ / AÍ >; 3, considering viscosity as Ai cP at 25 * C, measured when the content of solid material in the composition is 10% by weight and considering viscosity as Bx cP at 25 ° C, measured when the content of solid material in the composition is 30. % in weigh. An ink-jet recording process that uses ink is also described. Oxazolines are known as illustrated by R.H.

Wiley and L.L. Bennett in Chemical RTVÍTWS, volume 44, pages 447 to 476 (1949). The description of which is fully incorporated here by reference. In addition, the oxazoline derivatives being the main product of the reaction of an organic acid and amino alcohol is also known, as described by A.l. Meyers and D.L. Temple in the Journal of the Chemical Society, volume 92, page 6644 (1970). The description of which is fully incorporated here by reference. While known compositions and processes may be suitable for their intended purposes, there remains a need for acoustic hot melt ink compositions suitable for thermal inkjet printing. In addition, there is a need for hot melt ink compositions that are compatible with a wide variety of simple papers. In addition, there is a need for hot melt ink compositions, which generate high quality water resistant images on simple papers. There is also a need for hot melt inkjet ink compositions, which generate fast-drying, high-quality images on a wide variety of simple, low-cost papers with high text quality and high-quality graphics. In addition, there is a need for ink compositions for hot melt ink injection exhibiting minimal plume. Additionally, there is a need for ink compositions for hot melt ink injection, which exhibit minimal color leakage. There is also a need for ink compositions for hot melt ink injection, which exhibit excellent image permanence. In addition, there is a need for ink compositions for hot melt ink injection, which are suitable for use in acoustic inkjet printing processes. In addition, there is a need for hot melt inkjet ink compositions which are suitable for inkjet printing processes wherein the substrate is heated prior to printing, and cooled to room temperature subsequent to printing also known as process of heat printing and delay). There is also a need for ink compositions suitable for inkjet printing, where high optical densities can be achieved with relatively low dye concentrations. There is also a need for ink compositions suitable for inkjet printing wherein the curling of the substrate, such as paper, subsequent printing is minimized or avoided. These and other needs and advantages are achieved with the inks of the present invention in their modalities. SUMMARY OF THE INVENTION Examples of objectives of the present invention include, for example: An object of the present invention is to provide hot melt ink compositions with many of the advantages illustrated herein. Another object of the present invention is to provide hot melt ink compositions suitable for inkjet inkjet printing.

Still another object of the present invention is to provide hot melt ink compositions that are compatible with a wide variety of simple papers and wherein in embodiments the ink has low viscosity from 1 to about 5 centipoise at temperatures from about 120 to about 145 * C. Still another object of the present invention is to provide hot melt ink compositions that generate high quality images on single papers. Another objective of the present invention is to provide ink compositions for hot melt ink jet printing, comprising a dye, preferably a pigment, and a vehicle consisting of an oxazoline or benzozaxoline as the main component and optionally an amide and / or amino ester as the minor components, for example in embodiments of less than 30% by weight and wherein in embodiments, the inks possess low viscosity for example from 1 to 5 to 120 to approximately 150 [deg.] C. Still another object of the present invention is to provide hot melt ink jet ink compositions which exhibit low viscosity of about 1 centipoiseβ at a temperature of about 120 * C to about 150 ° C.

Still another object of the present invention is to provide hot melt ink jet fusion ink compositions that exhibit high sputtering efficiency. Yet another object of the present invention is to provide hot melt inkjet ink compositions that exhibit excellent image permanence. Still another object of the present invention is to provide hot melt inkjet ink compositions which do not contain water and which are suitable for use in printing inkjet printing processes. Still another object of the present invention is to provide hot melt ink compositions that do not contain water and that are suitable for ink jet printing processes, wherein the substrate is heated before printing and cooled to subsequent ambient temperature. to printing (also known as thermal printing and delay processes). Another object of the present invention is to provide ink compositions suitable for inkjet printing where high optical densities can be achieved with relatively low dye concentrations.

Still another object of the present invention is to provide solvent-free hot melt ink compositions, suitable for ink jet printing, where curling of the substrate subsequent to printing is minimized. Another object of the present invention is to provide hot melt inks wherein the viscosity of the ink is from about one centipoise to about 10 centipoise, for example at the injection temperature which may be from about 120 * C to about 180 °. C, and preferably from about 120 ° C to about 145 ° C, thus allowing excellent expulsion at reasonable energy levels. Further, in another object of the present invention hot melt inks are provided without water and a carrier comprising the reaction product of an organic acid and amino alcohol such as an oxazoline vehicle (I) and a dye such as pigment, and wherein the ink may optionally further include an amino ester (III) or amide (II). Additionally, another objective of the present invention provides hot melt inks without water or solvent for ink printing methods and apparatus, and wherein a number of the advantages as illustrated herein are achieved.

These and other objects of the present invention in embodiments thereof can be achieved by providing an ink composition comprising a colorant and a vehicle constituted by an oxazoline as the main constituent, and that ink possesses a viscosity of about 1 centipoise to about 10. centipoise at a temperature of about 120 ° C to about 150 ° C; and an ink composition consisting of a colorant and a carrier derived from an organic acid and amino alcohol, this ink has a viscosity of about 1 centipoise to about 5 centipoise at a temperature of about 140 ° C to about 165 ° C and this ink contains Optional known ink additives. DESCRIPTION DKTAT.TAnA DB THE INVENTION In embodiments, the ink compositions of the present invention comprise from about 3 to about 15% by weight of dye pigment, and about 85 to about 97% by weight of a carrier. The vehicle is comprised of from about 65 to about 100% by weight of an oxazoline (I) as the main constituent and of about or about 35% of a mixture of an amide (II) and / or an amino ester (III).

Modalities of the present invention include an ink composition consisting of a colorant and a carrier comprising the reaction product of an organic acid such as stearic acid and an amino alcohol such as 2-aminoethanol., and this product can be obtained by heating the reactants at elevated temperature such as from about 160 to about 180 ° C, optionally in the presence of a condensation catalyst such as staphylous butyl or sulfuric acid. During the reaction, water is formed as a by-product and removed by a distillation apparatus. The resulting product is identified by nuclear magnetic resonance (NMR) and infrared spectroscopy (IR), which in modalities is a mixture of an oxazoline as the main product, for example approximately 65 to 100% by weight in modalities, and further characterized by isolating the oxazoline compound by recrystallization using a suitable solvent or mixture of solvents such as dichloromethane, ethyl acetate, methanol, toluene, hexane and the like, or by isolating the oxazoline using chromatographic separation with silica or alumina and suitable known solvents. The minor constituents, for example about 0 to about 35% by weight of the reaction product, are usually the amide (II) adduct of the organic acid and amino alcohol, or the amino ester (II) product. The latter two products (II) and (III) can also be isolated through chromatographic separation and identified by IR and / or NMR spectroscopy. The oxazoline compound is preferred as the prime ink vehicle because of its low viscosity properties. The amino ester or amide derivatives exhibit slightly higher viscosity, more likely due to the presence of hydrogen bonding or bridges through the amide or amine moieties. Although oxazoline can be isolated and used as the ink vehicle, it is preferable not to isolate the reaction product mixture primarily because of the higher cost associated with its isolation. It is preferable in embodiments that the reaction be optimized to obtain a reaction product wherein the oxazoline content is high such as from about 65 to 100% by weight of the product, and preferably from about 85 to about 97% of the product. In addition, the use of solvent for the reaction is primarily avoided for cost reduction purposes. Examples of organic acids used to prepare the vehicle include acetic acid, propanic acid, butanoic acid, pentanoic acid, hexanoic acid, heptanic acid, octanoic acid, decanoic acid, dodecanoic acid, tridecanic acid, lauric acid, stearic acid, and mixtures thereof and similar and this acid is employed in an effective amount for example from about 25 to about 75% by weight of the reaction mixture.

Examples of amino alcohols selected for the generation of the carriers include 2-aminoethanol, 2-aminopropanol, 2-aminobutanol, 2-aminohexanol, 2-methyl-2-aminoethanol, 2-ethyl-2-aminoethanol, 2-ethyl-2- aminopropanol, 2-ethyl-2-aminoethanol, 2-ethyl-2-aminopropanol, l-amino-2-propanol, l-amino-2-butanol, l-amino-2-pentanol, 3-amino-2-butanol, 2-araino-1, 3-propopanediol, 2-amino-2-ethyl-l, 3-propanediol, 3-amino-1,2-propandiol, tris (hydroxymethyl) -aminoethane, their mixtures and the like and this alcohol is chosen in an effective amount for example from about 10 to about 50% of the reaction mixture. Examples of condensation catalysts that can be used include sulfuric acid, phosphoric acid, zinc chloride, magnesium chloride, zinc acetate, magnesium acetate, dibutyltin dilaurate, butyl stannic acid, mixtures thereof and the like and this catalyst is chosen in a effective amount for example from about .01 to about 1% of the reaction mixture. In one embodiment of the present invention, a vehicle derived from 1 mole of stearic acid and 1 mole of 1-amino-2-propanol is prepared by charging a one liter Parr reactor equipped with a distillation apparatus and mechanical stirrer with approximately 284 grams of stearic acid, 75 grams of l-amino-2-propanol and 0.3 gram of butyl stannic acid. The mixture is then heated with stirring to about 160 ° C, and where the water is collected in the distillation receiving flask. The mixture is then heated to about 180 ° C for a period of 2 hours and the pressure is then lowered from atmospheric pressure to about 1 mm Hg over a period of 1 hour. During the entire reaction time, approximately 31 grams of water are collected. The reaction mixture is then subjected to pressure at atmospheric pressure and the product is cooled to room temperature, approximately 25 * C. The product is then characterized and consists of a mixture of about 95% by weight of 2-stearyl-4-methyloxazoline (structure I, where R x is a stearyl group, R a, R 3 and R "are hydrogen and R is a methyl group) and about 5% N (-hydroxyethyl) -stearamide (structure II, wherein Rj is stearyl, Rj, R, and R, are hydrogen and Re is methyl and this product has a melting point of about 82. ° C as measured by the apparatus to determine melting point and ELECTR0THERMALM and where the structure of the formula is determined by both carbon-13 nuclear magnetic resonance and protons.The viscosity of vehicular product can then be measured as approximately 4 centipoise to one temperature of about 140 ° C. Modalities of the present invention include an ink composition with a certain vehicle of an oxazoline I or benzoxazoline as represented by the following formulas: [to wherein Rx is an alkyl group of about 1 to about 55 carbon atoms, Ra, R ,, R4 and Rβ are alkyl, an alkyl alcohol or an alkyl ester, each alkyl contains about 1 to about 55 carbon atoms; wherein Ra, Rs, R "and R9 are alkyl alcohol - (CHa) n-0H, wherein n is an integer from about 1 to about 6, or wherein Ra, R3 R, and Re are the alkyl ester (CHa) ) n-0aC- (CHa) »CH3, wherein n is an integer from about 1 to about 6, and m is an integer from about 1 to about 53; where the amide is present and is represented by the following formulas II or lia: II Ha where R ,. is an alkyl group of from about 1 to about 55 carbon atoms, Ra, R3, R "and R5 are alkyl, an alkyl alcohol or an alkyl ester group, each alkyl contains about 1 to about 55 carbon atoms; wherein the amino ester is present and is represented by the following formula III: NH '»[[I] where Rx is an alkyl group of from about 1 to about 55 carbon atoms, Ra, R3, R4 and Rβ are alkyl, an alkyl alcohol or an alkyl ester, each alkyl contains about 1 to about 55 atoms carbon; a printing process comprising incorporating into an inkjet inkjet printer, an ink comprising a colorant and an oxazoline component carrier, and this ink has a viscosity of about 1 centipoise to about 25 centipoise at a temperature of about 125 ° C at approximately 185 * C; an ink composition comprising a colorant and an oxazoline carrier, this ink has a viscosity of about 1 centipoise to about 25 centipoise at a temperature of about 125 ° C to about 185 ° C; and an ink composition consisting of a dye and a benzoxazoline vehicle, this ink has a viscosity of about 1 centipoise to about 25 centipoise at a temperature of about 125 ° C to about 185 ° C. In another embodiment of the present invention, a vehicle derived from 2 moles of stearic acid and 1 mole of 2-amino-2-ethyl-1,3-propanediol is prepared by charging a liter Parr reactor equipped with a distillation apparatus and mechanical agitator with approximately 284 grams of stearic acid, 60 grams of 2-amino-2-ethyl 1,3-propandiol and 0.5 gram of butyl stannic acid. The mixture is then heated with stirring to about 160 ° C, and where the water is collected in the distillation receiving flask. The mixture is then heated to about 180 ° C for a period of 2 hours and the pressure is then lowered from the atmospheric pressure of about 1 mm Hg over a period of 1 hour, during the entire reaction time about 31 grams of water The reaction mixture is then subjected to pressure at atmospheric pressure and the product is cooled to room temperature.The product is then characterized and has a melting point of approximately 45 ° C as measured by the apparatus to determine ELECTROTHERMAL melting point. ? * and its structure of the formula is determined by nuclear magnetic resonance indicating that the product is constituted by a mixture of approximately 93% by weight of 2-stearyl-5-ethyl-5-methoxystearate-oxazoline (illustrated as structure IV) 7% by weight of a mixture of N '(2-methoxystearate-butane) -stearamide (illustrated as structure V) and 2-stearyl-5-ethyl-5-methanol-oxazoline (illustrated as ucture VI) The viscosity was then measured to be about 5.4 centipoise at a temperature of approximately 120 * 0. A summary of the reaction sequence is given below: JL) l «^^ OH H2N OH Heat IV SAW OH Examples of oxazoline include 2-stearyl-5-ethyl-5-methoxystearate-oxazoline, 2-stearyl-5-ethyl-hydroxymethyl-oxazoline, 2-stearyl-4-ethyl-oxazoline, 2-stearyl-4-methoxystearate-oxazoline, 2-stearyl-4-hydroxymethyl-oxazoline, 2-stearyl-4-hydroxymethyl-bis-5, 5- (ethoxy stearate) -oxazoline, 2-stearyl-5-hydroxymethyl-5- (methoxystearate) -oxazoline, their mixtures and the like , as illustrated here. Examples of dyes, preferably dyes selected for the inks of the present invention, are known, with reference to the color index (Color Index) and include those as illustrated in U.S. Pat. No. 5,310,887, the description of which is hereby incorporated by reference, for example, Resorcin Crystal Violet, Orasol Black RL or Intraplast Black RL / Solvent Black 29, Lapranol Black BR, Savinyl Black RLS, Orasol Black RLP, Neozapon Black X57; yellow solvent dyes inclusive of Savinyl Yellow 2 RLS, Savinyl Yellow RLSN, Intraplast Yellow 2GLN, Neozapon Yellow 081, Neozapon Yellow 141, Levaderm Lemon Yellow, Zapon Fast Yellow CGR, Aisen Fast Yellow CGNH, Zapon Yellow 100, Zapon Yellow 157, and Savinyl Yellow RLS; Neopan Yellow 075; Neopan Blue; carbon black REGAL 330"*; Sunbright Yellow; Sunbright Rubine, Sunchem Yellow, Sunchem Blue, Sunchem Rubine, available from Sun Chemical Corporation; magenta dyes such as Neozapon Red 492, Direct Brilliant Pink B, Savinyl Pink 6 BLS, Savinyl Red BLS , Orasol Red 2 BL, Intraplast Red G (Orasol Red), Savinyl Red BLSN, Savinyl Scarlet RLS, Savinyl Fire Red 3GLS, and Zapon Red 335, light blue dyes such as Orasol Blue 2 GLN, Neozapon Blue 807, Savinyl Blue RLS; Savinyl Blue GLS, Orasol Blue GN, and Losol Blue; Brown dyes including Zapon Brown 187 and Savinyl Brown GLS, Solvent Green 3, Sudan Black B, Ceres Blue 2V, Liquid Oil Jet Black, Macrolex Red G Gram, Macrolex Yellow 3G, Victoria Blue R, available from Bayer AG, Leverkusen Germany, Morfast Blue 100, Morfast Red 104 and Morfast Red 100 available from Morton International Specialty Chemicals Group, Chicago, IL, their blends and the like with preferred dyes in embodiments including Reactint Black 57AB, Reacti nt Black X40LV, Reactint Blue 17AB, Reactint Blue X3LV, Reactint Blue X19, Reactint Red X26B-50, Reactin Red X520, Reactin Violet X80LT, Reactint Orange X38, and Reactint Yellow X15, all unavailable from Milliken Chemicals. Typically, the colorant is present in the ink in an amount from about 0.01 to about 10% by weight, preferably from about 0.05 to about 4% by weight and more perferably from about 0.1 to about 3% by weight, although the quantity may be outside these ranges. Optional ink additives include biocides such as DOWICIL ISO1 *, 2001 * and 75"*, benzoate salts, sorbate salts and the like present in effective amounts such as for example an amount of about .0001 to about 4% by weight and preferably of about 0.01 to about 2.0% by weight; pH control agents such as acids or bases, phosphate salts, carboxylate salts, sulfite salts, amine salts and the like, present in an amount from 0 to about 1% by weight and preferably from about 0.01 to about 1% by weight or the like The inks of the present invention are particularly suitable for printing processes wherein? substrate, such as paper, transfer materials, or the like are heated during the printing process to facilitate formation of the liquid crystalline phase within the ink, preferably the substrate is heated to the highest possible temperature, to allow the fastest possible ink drying without damage to the substrate. When substrates of transparencies are used, temperatures are typically limited to a maximum of about 100 ° C to about 110 ° C, since the polyester typically employed as the base sheet in the transparency sheets tends to deform at higher temperatures. Formulated and paper substrates can however tolerate higher temperatures, often being suitable for exposure to temperatures of 150"C or even 200" C in some cases. Typical heating temperatures are from about 40 * C to about 140 ° C and preferably about 60 ° C to about 95 * C, although the temperature may be outside these ranges. The inks of the present invention can be prepared by various convenient methods. For example, inks can be prepared by lightly agitating or agitating the individual components such as melt-mixing the vehicle with a colorant at a temperature of about 90 ° C to about 130 ° C followed by cooling to about 25 ° C. The inks of the present invention are particularly suitable for use in printing processes with acoustic ink injection. In acoustic inkjet printing, with reference to the patents described herein the descriptions of which have been incorporated herein by reference, an acoustic beam exerts a radiation pressure against objects on which it impinges. In this way, when the acoustic beam impinges on a substrate free of ink from a liquid reservoir below, the radiation pressure exerted against the reservoir surface can reach a sufficiently high level to release individual droplets of liquid from the reservoir , despite the restraining force of surface tension. Focusing the beam on or on the surface of the tank intensifies the radiation pressure it exerts for a given amount of power supply, reference IBM Technical Description Bulletin (IBM Technical Disclosure Bulletin) vol. 16, No. 4, September 1973 pages 1168 to 1170, the description of which is hereby incorporated by reference in its entirety. Acoustic ink printers typically comprise one or more acoustic radiators to illuminate the free surface of a liquid ink reservoir with respective acoustic beams. Each of these beams is usually brought to focus at or near the surface of the tank (ie the liquid / air interface). Furthermore, printing is conventionally performed by independently modulating the excitation of the acoustic radiators according to the data samples fed to the image to be printed. This modulation allows the radiation pressure, which each beam exerts against the free ink surface, to make brief and controlled excursions at a sufficiently high pressure level to overcome the constraining force of the surface tension. This in turn causes individual droplets of ink to be ejected from the free ink surface on demand at a suitable rate to cause them to be deposited in an image configuration or in a close recording medium. The acoustic beam can be modulated by intensity or focus / out of focus to control the expulsion timing, or an external source can be used to extract droplets from the acoustically excited liquid on the surface of the deposit on demand. Regardless of the synchronization mechanism employed, the size of the droplets ejected is determined by the waist diameter of the focused acoustic beam. Acoustic ink printing is attractive because it does not require nozzles or small ejection holes that have caused much of the problems of pixel positioning accuracy and reliability that DC and inkjet inkjet printers have had. Drop before demand, conventional. The size of the ejection orifice is a critical design parameter of an ink ejection because it determines the size of the droplets of the ink ejecting the ejection. As a result, the size of the injection hole can not be increased without sacrificing resolution. The acoustic impression has increased the intrinsic reliability because there are usually no nozzles to seal. further, small ejection holes are avoided, so that acoustic printing can be performed with a greater variety of inks than conventional inkjet printing, including inks having higher viscosities and inks containing pigments and other particulate components. Acoustic ink printers incorporating print heads comprise acoustically illuminated spherical focusing lenses that can print pixels (image elements) accurately positioned at resolutions that are sufficient for high-quality printing of relatively complex images. It has also been determined that the size of the individual pixels printed by this printer can be varied over a significant range during operation, thus accommodating, for example, the printing of shaded images in varying form. In addition, the known droplet ejection technology can be adapted to a variety of print head configurations, including (1) single ejector modes for scanning scan printing, (2) ejector arrays configured on matrix for matrix printing, and (3) various different types of page width ejector assemblies in the range of (1) single row, sparse sets for hybrid parallel / serial print forms to (ii) multiple row staggered sets with individual ejectors for each of pixel portions or addresses within a page width image field (ie ejector / pixel / single line) for ordinary line printing. Suitable inks for inkjet ink printing are typically liquid at room temperature (ie about 25 ° C) however, in other embodiments the ink is in a solid state at ambient temperatures and the ink is allowed to liquefy upon heating or any Another convenient method before introducing the ink to the printhead. Images of two or more colors can be generated by several methods, including by processes where a simple print head sends acoustic waves in deposits of different color inks. Additional information regarding printing processes and apparatus for inkjet ink is described, for example, in US Pat. No. 4,308,547, U.S. Pat. No. 4,697,195, the U.S. Patent. No. 5,028,937, U.S. Pat. No. 5,041,849, U.S. Pat. No. 4,751,529, the U.S. Patent. No. 4,751,530, the U.S. Patent. No. 4,751,534, the U.S. Patent. No. 4,801,953, and US Pat. No. 4,797,693, the descriptions of each of which are fully incorporated herein by reference. The use of focused acoustic beams to eject droplets of controlled diameter and velocity from a liquid or free surface is also described in J. Appl. Phys. , Volume 65, No. 9 (May 1, 1989), and the references given therein, the description of which are hereby fully incorporated by reference. Specific embodiments of the invention will now be described in detail. These examples are intended as illustrative and the invention is not limited to the materials, conditions or process parameters established in these modalities. All parts and percentages are given by weight unless otherwise indicated. EXAMPLE I An ink vehicle derived from the condensation product of one mole of stearic acid and one mole of 1-amino-2-propanol using butyl stannic acid as a catalyst which is prepared as follows. A one-liter Parr reactor equipped with a distillation apparatus and mechanical stirrer is charged with approximately 284 grams of stearic acid, 75 grams of l-amino-2-propanol and 0.3 gram of butyl steanoic acid. The mixture is then heated with stirring to about 160 ° C, and where water is collected in the distillation receiving flask. The mixture is then heated to about 180 ° C for a period of 2 hours and the pressure is then lowered from atmospheric pressure to about 1 mm Hg over a period of 1 hour., approximately 31 grams of water were collected. The reaction mixture was then subjected to pressure at atmospheric pressure and the product was cooled to room temperature, about 25 ° C. The resulting product was then characterized as having a melting point of about 70 ° C as measured by an apparatus to determine melting point and the product is identified by nuclear magnetic resonance, which is constituted by a mixture of approximately 93% by weight of 2-stearyl-4-methyloxazoline (structure I, where R 'is a stearyl group, Ra, R, and R * are hydrogen and R, is a methyl group) and about 7% of N (2-hydroxyethyl) -stearamide (structure II, R? is stearyl, R2, R3 and R4 are hydrogen and Ra is a methyl group). Viscosity, penetration and acoustic loss were then measured and reported in Table 1. EXAMPLE II An ink vehicle derived from the condensation product of one mole of stearic acid and one mole of 1-amino-2-ethyl-1, 3 -propandiol using staphylous butyl acid as catalyst designer, prepare as follows. A one-liter Parr reactor equipped with a distillation apparatus and mechanical stirrer is charged with approximately 284 grams of stearic acid, 60 grams of 2-amino-1,3-propanediol and 0.49 gram of butylstanoic acid. The mixture is then heated with stirring to about 160 ° C, and where water is collected in the distillation receiving flask. The resulting mixture is then heated to about 180 ° C over a period of 2 hours and the pressure is then lowered from atmospheric pressure to about 1 mm Hg over a period of 1 hour.At the entire reaction time, approximately 30 grams of water The reaction mixture is then subjected to atmospheric pressure and the product is cooled to room temperature.The product is characterized by having a melting point of approximately 45 * C as measured by the apparatus to determine melting point and the product is identified by nuclear magnetic resonance which is constituted by a mixture of approximately 88% by weight of 2-stearyl-5-ethyl-5-methoxystearate oxazoline (structure I, where Ri is a stearyl group, Ra is an ethyl group , R3 is a group CH2-0-H, and R "and Rβ are both hydrogen atoms), approximately 88% by weight of 2-stearyl-5-ethyl-5-methanol-oxazoline (structure I wherein R ,. it's a stearyl group, R2 is a gr upo ethyl, R3 is CHa-QC (0) - (CH2) lßCH3, R4 and Re both are hydrogen) and about 6% by weight of N (2-methoxystearate-butane-stearamide (structure III, where R ± is a stearyl group, R2 is an ethyl group, R3 is CHa-0-C (O) - (CHa) lßCH ,, R «and Rg are both hydrogen atoms). The viscosity, penetration point and acoustic loss were then measured and reported in Table 1. EXAMPLE III An ink vehicle derived from the condensation product of one mole of stearic acid and 0.5 mole of 2-amino-2-ethyl-1 , 3-propanediol using butyl stannic acid as catalyst, is prepared as follows. A one-liter Parr reactor equipped with a distillation apparatus and mechanical stirrer is charged with approximately 284 grams of stearic acid, 120 grams of 2-amino-2-l, 3-propanediol and 0.25 gram of stannous butyl acid. The resulting mixture is then heated with stirring to about 160 ° C, and where water is collected in the distillation receiving flask. The mixture is then heated to about 180 ° C for a period of 2 hours and the pressure is then lowered from atmospheric pressure to about 1 mm Hg for a period of 1 hour. During the entire reaction time, approximately 31 grams of water were collected. The reaction mixture is then subjected to atmospheric pressure and the product is cooled to room temperature. The resulting product was then characterized by having a melting point of about 35 ° C as measured by an apparatus for determining melting point, and the product is identified by nuclear magnetic resonance which is constituted by a mixture of about 95% by weight of 2-stearyl-5-ethyl-5-methanoloxazoline (structure I), wherein Rx is a stearyl group, Ra is an ethyl group, R3 is a CHa-0-H group, and R, and R are both hydrogen atoms) and about 5% 2-stearyl-acrylamido-2 -ethyl-l, 3-propanediol (structure II, wherein Rx is a stearyl group, Ra e is an ethyl group, Rs is a group CHj-0-H, and R, and R, are both hydrogen atoms). The viscosity, penetration point and acoustic loss were then measured and reported in Table 1. EXAMPLE I AND An ink vehicle derived from the condensation product of one mole of stearic acid and 0.5 mole of 3-amino-1,2-propanediol using stannous butyl acid as a catalyst, it is prepared as follows. A one-liter Parr reactor equipped with a distillation apparatus and mechanical stirrer with approximately 284 grams of stearic acid, 45.5 grams of 3-amino-1,2-propanediol and 0.2 gram of butyl stannic acid. The mixture is then heated with stirring to about 160 ° C, and where water is collected in the distillation receiver flask.The resulting mixture is then heated to about 180 ° C over a period of 2 hours and the pressure is then decreased from atmospheric pressure at about 1 mm Hg over a period of 1 hour.At the entire reaction time, approximately 30 grams of water was collected.The reaction mixture is then subjected to atmospheric pressure and the product is cooled to room temperature. The product is then characterized as having a broad melting point of about 85"C to about 92 * C, as measured by the melting point apparatus, and the product is identified by nuclear magnetic resonance consisting of a mixture of about 75. % by weight of 2-stearyl-4-methoxystearate oxazoline (structure I, wherein Rx is a stearyl group, Ra, R, and R, are hydrogen atoms and Ra is a group CHa-0-C (0) - ( CH2) l ßCH3 about 25% by weight of a mixture of an amide (illustrated as structure II where Rx is a stearyl group, R2, R3 and R "are hydrogen atoms and Rs is a CHa-0-C (0) - ( CHa) lßCH3) and an amino ester (structure III in which Rx is a stearyl group, Ra, R3 and R4 are hydrogen atoms and Rs is a group CHa-0-C (0) - (CHa) lßCH3). The viscosity, penetration point and acoustic loss were then measured and reported in Table 1. EXAMPLE V An ink vehicle derived from the condensation product of one mole of stearic acid and one mole of 3-amino-1,2-propanediol using stannous butyl acid as a catalyst, it is prepared as follows. A one-liter Parr reactor equipped with a distillation apparatus and mechanical stirrer is charged with approximately 284 grams of stearic acid, 91 grams of 3-amino-1,2-propanediol and 0.3 gram of butyl stannic acid. The mixture is then heated with stirring to about 160 ° C, and where water is collected in the distillation receiving flask.The mixture is then heated to about 180 ° C for a period of 2 hours and the pressure is then lowered from the atmospheric pressure at approximately 1 mm Hg for a period of 1 hour.At the entire reaction time, approximately 31 grams of water was collected.The reaction mixture is then subjected to atmospheric pressure and the product is cooled to room temperature. The product is characterized by having a melting point of about 102 ° C as measured by the apparatus to determine the melting point, and the structure product is identified by nuclear magnetic resonance which is constituted by a mixture of about 96% by weight of 2-stearyl-4-methanoloxazoline (structure I, where R x is a stearyl group, R a, R 3 and R 4 are hydrogen atoms and Re is a methanol group) and approximately 4 % by weight of an amide (structure II where RA is a stearyl group, Ra, R3 and R, are hydrogen atoms and R, is a methanol group). The viscosity, penetration point and acoustic loss were then measured and reported in Table 1. EXAMPLE VI An ink vehicle derived from the condensation product of one mole of stearic acid and 0.33 mole of tris (hydroxymethyl) aminomethane using staphylous butyl acid as a catalyst, it is prepared as follows. A one-liter Parr reactor equipped with a distillation apparatus and mechanical stirrer with approximately 284 grams of stearic acid, 41 grams of tris (hydroxymethyl) aminomethane and 0.3 gram of butyl stannic acid. The mixture is then heated with stirring to about 170 * C, and where water is collected in the distillation receiving flask. The mixture is then heated to about 180 ° C for a period of 2 hours and the pressure is then lowered from atmospheric pressure to about 1 mm Hg over a period of 1 hour. During the entire reaction time, approximately 30 grams of water were collected. The reaction mixture is then subjected to atmospheric pressure and the product is cooled to room temperature. The product is then characterized as having a melting point of about 75 ° C to about 80 ° C as measured by the apparatus to determine melting point, and the product is identified by nuclear magnetic resonance which is constituted by a mixture of about 95% by weight of 2-stearyl-bis-5,5-methoxystearate oxazoline (structure I, wherein Rx is a stearyl group, Ra, and R3 are CHa-0-C (0) - (CH2)? ßCH3 groups and R, and R5 are hydrogen groups) and about 5% by weight of a mixture of an amide (structure I wherein Rx is a stearyl group, R2, and R3 are CHa-0-C (0) - (CHa) lßCH3 groups and R, and R, are hydrogen groups) and 2-stearyl-bis-5-hydroxymethyl-5-methoxystearate oxazoline (structure I wherein Rx is a stearyl group, Ra is a methanol group, and R, is a CHa group) 0-C (0) - (CH2)? 6CH3 and R, and R, are hydrogen). The viscosity, penetration point and acoustic loss were then measured and reported in Table 1. EXAMPLE VII An ink vehicle derived from the condensation product of one mole of stearic acid and 0.5 mole of tris (hydroxymethyl) aminomethane using staphylous butyl acid as a catalyst, it is prepared as follows. A one-liter Parr reactor equipped with a distillation apparatus and mechanical stirrer with approximately 284 grams of stearic acid, 60.5 grams of tris (hydroxymethyl) aminomethane and 0.3 gram of butyl stannic acid. The mixture is then heated with stirring to about 170 ° C, and water is collected in the distillation receiving flask. The mixture is then heated to about 180 ° C for a period of 2 hours and the pressure is then lowered from atmospheric pressure to about 1 mm Hg for a period of 1 hour. During the entire reaction time, approximately 30 grams of water were collected. The reaction mixture is then subjected to atmospheric pressure and the product is cooled to room temperature. The product is characterized by having a melting point of approximately 6l ° C, as measured by the apparatus to determine the melting point, and the product / structure is identified by nuclear magnetic resonance which is constituted by a mixture of approximately 95% by weight of 2-stearyl-bis-5-hydroxymethyl-5-methoxystearate oxazoline (structure I, wherein R is a stearyl group, Ra is a methanol group and R3 is a CHa-0-C (O) - ( CH2) lßCH3 and R <; and Ra are hydrogen groups) and about 5% by weight of an amide (structure II wherein Rx is a stearyl group, Ra is a methanol group and R3 is a CHa-0-C (O) - (CHa) lßCH3 group and R4 and Rβ are hydrogen). The viscosity, penetration point and acoustic loss were then measured and reported in Table 1.

?? BLA_1 Vehicle Viscosity Loss Penetration mPa s Acoustics mm dB / mm U5Q ° C) f! 50'C ^ (25 'Q Example I 3.6 34.0 0.8 Example II 3.3 32.2 1.0 Example III 4.0 32.0 2.3 Example IV 4.8 44.7 0.95 EEjjeemmpplloo VV 1133..77 48.5 0.6 Example VI 4.4 34.0 0.45 Example VII 4.4 35.6 0.65 EXAMPLE VIII An ink vehicle derived from the condensation product of one mole of stearic acid and one mole of 2-aminophenol using butyl stanoic acid as a catalyst is prepared as follows A one liter Parr reactor equipped with a distillation apparatus and mechanical stirrer with approximately 284 grams of stearic acid, 109 grams of 2-aminophenol and 0.3 gram of staphylous butyl acid.The mixture is then heated with stirring to approximately 170 * C , and where water is collected in the distillation receiving flask.The mixture is then heated to about 180 ° C for a period of 2 hours and the pressure is lowered from atmospheric pressure to approx. e 1 mm Hg for a period of 1 hour. During the entire reaction time, approximately 30 grams of water were collected. The reaction mixture is then subjected to atmospheric pressure and the product is cooled to room temperature. The product is characterized by having a melting point of approximately 50'c as measured by the apparatus for determining melting point, and the product is additionally identified by nuclear magnetic resonance which is constituted by a mixture of approximately 77% by weight of 2-stearylbenzoxazoline (structure la, wherein Rx is a stearyl group, and Ra, R, R < and R, are all hydrogen atoms) approximately 23% by weight of a mixture of starting material and amide (structure lia in where Rt is a stearyl group, and Ra, R3, R * and Re are all hydrogen atoms). Penetration measurements. Acoustic Loss and Viscosity Penetration is measured using a penetrometer K.I.C. available from Noran Inc., using the following procedure. 1.- A test sample is melted at approximately 20 * C above its melting point in an aluminum pan with agitation to release any air bubbles. 2.- The molten sample is then emptied into a brass cylinder, in such a way that a convex meniscus is formed. The brass cylinder adapted at one end with a removable brass cover, is located inside a block heater with the cover facing down, and kept in a molten state for one hour. 3.- The sample and container are then cooled, inside the block heater, to 25 * C at a controlled speed, and left undisturbed for 24 hours at the measurement temperature. 4.- The cylinder is then removed from the block heater and inverted. The brass cover is removed and a flat and smooth surface is exposed. The container is then placed on the base of the penetrometer with the smooth surface facing upwards. A weight of 100 grams is placed on the needle of the penetrometer, providing a total load of 150 grams for the needle and all accessories. The indicator assembly is then placed in the "zero" position. The indicator assembly is then adjusted until the tip of the needle almost touches the surface of the specimen. The mobile assembly locks in this position. 5.- By means of slow adjustment, the needle is brought to touch just the surface of the specimen. After 5 minutes, the arrow on the needle is released and left free for 5 seconds. Then, the indicator arrow is pressed until it is stopped by the arrow of the needle, and the penetration is read from the indicator scale in units of millimeters. Acoustic attenuation is measured with a custom-made acoustic test accessory comprising two transducers placed one above the other. The bottom transducer is supported on a translation stage so that it can be positioned laterally towards the top of the transducer to provide a maximum signal. The space between the transducers is controlled by a mechanism located in the background transducer. The upper transducer is connected to an oscilloscope where the amplitude of the acoustic signal is detected. The attenuation is measured as the loss of sound through the ink sample, when the transducers are spaced at a predetermined distance. Each transducer is adapted with a thermal resistance and a thermo pair coupled to a heat controller. The acoustic loss is then measured using the following procedure: 1. The ink sample specimen is placed between the transducers. The temperature is adjusted to a setting temperature of 150 ° C. The sample is then left undisturbed until equilibrated at 150 * C for 5 minutes. 2.- The two transducers are assembled in such a way that the acoustic signal in the oscilloscope is maximized. The amplitude and position of the signal are recorded. 3.- The two transducers are separated by a distance that varies from 25.4 microns to 125.4 microns. Then, the amplitude and position of the signal are recorded. Each measurement is checked three times and three samples of the same specimen are measured. 4. - The attenuation in decibels per millimeter (dB / mm) is then calculated by rationing the amplitude values obtained at different separation distances. The rheological characterization is performed using a Carri-Med CSL-100 controlled tension rheometer using a cone of two degrees, 4 centimeters and plate geometry. The measurement consisted of 5 consecutive shear rate sweeps, up to the maximum speed of 1250 s "1, and temperature increases from 100 * C to 18? 'C. The infinite shear viscosity is then reported at I50ßc EXAMPLE IX A EXAMPLE XV Various ink compositions comprising about 95% by weight of vehicle and 5% by weight of dye, were prepared by melt mixing at 120 ° C. using a mechanical stirrer for a duration of 5 minutes The dyes used were Neopan Yellow 075 , Neopan Blue both were obtained from BASF Corporation, black pigment REGAL 33O1 ** obtained from Cabot, Sunbright Rubine obtained from Sun Chemical Corporation, and Reactin Black X57-AB obtained from Milliken Chemicals.The color properties and viscosity characteristics are reported in Table 2 XABJA-2 Vehicle Vehicle viscosity mPa s fl50'ci Example IX Example VI Neopan Blue 5.1 Example X Example II Neopan Yellow 4.7 Example XII Example vO Neopan Yellow 4.9 Example XI Example VI Regal 330 11.0 Example XIII Example VI Sunbright Rubinß 10.8 Example XIV Example VI Neopan Yellow 4.8 Example XV Example VI R.Black X57A 4.2 Images developed with the above prepared inks in a test accessory for inkjet inkjet printer are considered to exhibit excellent image quality and other advantages illustrated here. Other modifications of the present invention may occur to those persons with ordinary skill in the subsequent art to review the present application and these modifications, including their equivalents, are intended to be included within the scope of the present invention. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Having described the invention as above, property is claimed as contained in the following:

Claims (23)

1. CLAIMS 1.- Ink composition characterized in that it comprises a colorant and a vehicle component, this vehicle component is constituted by a condensation product of an organic acid and an amino alcohol.
2. 2. - Ink composition according to claim 1, characterized in that the condensation product is constituted by an oxazoline or benzoxazoline, and this product optionally contains an amide and / or an amino ester.
3. 3. Ink composition according to claim 2, characterized in that oxazoline I or benzoxazoline is represented by the following formulas: the where Rt is an alkyl group with from about l to about 55 carbon atoms, Ra, R3, R4 and R5 are alkyl, an alkyl alcohol or an alkyl ester, each alkyl contains from about 1 to about 55 carbon atoms.
4. 4. Ink composition according to claim 3, characterized in that R2, R3, R4 and R, are the alkyl group - (CH2) n-0H, wherein n is an integer from about 1 to about 6, or in where R2, R3, R4 and Rs are the alkyl ester (CHa) B-0aC- (CHa) mCH3, wherein n is an integer from about 1 to about 6, and m is an integer from about 1 to about 53.
5. 5. - Ink composition according to claim 2, characterized in that the amide is present and is represented by the following formulas II or lia: "Ib wherein R x is an alkyl group with from about 1 to about 55 carbon atoms, R a, R 3, R 4 and R, are alkyl, alkyl alcohol or an alkyl ester group, each alkyl contains from about 1 to about 55 carbon atoms.
6. 6. - Ink composition according to claim 5, characterized in that wherein Ra, R3 / R4 and Rs are the alkyl alcohol - (CHa) »- OH, wherein n is an integer from about 1 to about 6, or the alkyl ester (CHa) a-0aC- (CH2) BCH3, wherein n is an integer from about 1 to about 6, and m is an integer from about 1 to about 53. 7.- Ink composition according to claim 2, characterized in that the amino ester is present and is represented by the following formula III:
7. NH2 Ul wherein Rt is an alkyl group of from about 1 to about 55 carbon atoms, Ra, R3, R4 and Rs are alkyl, an alkyl alcohol or an alkyl ester, each alkyl contains about 1 to about 55 carbon atoms.
8. 8. Ink composition according to claim 7, characterized in that R2, R3, R, and R, are alkyl alcohol - (CHa) "- OH, wherein n is an integer from about 1 to about 6, or in where R2, R3, R "and R" are the alkyl ester (CHa) "-? 2C- (CHa) .CH3, wherein n is an integer from about 1 to about 6, and m is an integer from about 1 to approximately 53.
9. 9.- Ink composition according to claim 2, characterized in that the oxazoline or benzoxazoline is present in an effective amount of about 65 to about 100% by weight, and the amide and amino ester both are present in an amount from about 0 to about 35% by weight of the vehicle.
10. 10. Ink composition according to claim 1, characterized in that the viscosity is from about one centipoise to about 10 centipoise at a temperature of about 100 to about 160 * C, wherein the vehicle has a melting point of about 25. at about 100 * C, and wherein the acoustic loss is from about 10 to about 60 at a temperature of from about 100 to about 150 * C.
11. 11. Ink composition according to claim 2, characterized in that the oxazoline is 2-stearyl-5-ethyl-5-methoxystearate-oxazoline, 2-stearyl-5-ethyl-5-hydroxymethyl-oxazoline, 2-stearyl- 4-Ethyl-oxazoline, 2-stearyl-4-methoxystearate-oxazoline, 2-stearyl-4-hydroxymethyl-oxazoline, 2-stearyl-4-hydroxymethyl-bis-5, 5- (methoxystearate) -oxazoline, 2-stearyl- 5-hydroxymethyl-5-methoxystearate-oxazoline or 2-stearyl-benzoxazoline.
12. 12. - Ink composition according to claim 1, characterized in that the organic acid is acetic acid, propanoic acid, butanoic acid, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, decanoic acid, dodecanoic acid, tridecanoic acid, lauric acid, stearic acid, and wherein the amino alcohol is 2-arainoethanol, 2-aminopropanol, 2-aminobutanol, 2-aminohexanol, 2-methyl-2-aminoethanol, 2-ethyl-aminopropanol, 2-ethyl-2-aminoethanol, 2-ethyl-2-aminopropanol, 2-ethyl-2-aminopropanol, 1-amino-2-propanol, l-amino- 2-butanol, l-amino-2-pentanol, 3-amino-2-butanol, 2-amino-l, 3-propanediol, 2-amino-2-ethyl-l, 3-propanediol, 3-amino-1, 2-Propanediol, or tris (hydroxymethyl) -aminoethane.
13. 13. Ink composition according to claim 2, characterized in that the oxazoline is 2-stearyl-4-hydroxymethyl-bis-5,5-methoxystearatoxazole.
14. 14. Ink composition according to claim 2, characterized in that the oxazoline is 2-stearyl-5-hydroxymethyl-5-methoxystearate oxazoline.
15. 15. Ink composition according to claim 1, characterized in that the ink is a solid at room temperature from about 20 to about 30 * C.
16. 16. Ink composition according to claim 1, characterized in that the dye is a pigment present in an amount from about 0.05 to about 20% by weight or wherein the dye is a pigment present in an amount of about 5% by weight and where the dye is a light blue, magenta, yellow, blue, green, brown, black pigment or mixtures thereof.
17. 17. A printing process comprising incorporating in an acoustic inkjet printer, an ink consisting of a dye and an oxazoline component carrier, and this ink has a viscosity of about 1 centipoise to about 25 centipoise at a temperature of about 125 * C to approximately 185 * C.
18. 18. Process comprising (a) providing an acoustic ink printer, having a liquid ink reservoir with a free surface, and a print head including at least one droplet ejector to radiate the free surface of the ink with Focused acoustic radiation for ejecting individual droplets of ink on demand, the radiation is brought to focus with a finite waist diameter in a focal plane, the ink comprises a colorant and a vehicle derived from the condensation product of an amino alcohol and an organic acid , this ink has a viscosity from about 1 centipoise to about 25 centipoise at a temperature of about 125 * C to about 185 ° C; and (b) causing droplets of the ink to be ejected onto a recording sheet, in a pattern in the form of an image at a temperature of about 120 ° C to about 185 ° C.
19. 19. An ink composition consisting of a dye and an oxazoline or benzoxazoline vehicle, this ink has a viscosity of about 1 centipoise to about 25 centipoise at a temperature of about 125 * C to about 185 ° C. ink according to claim 2, characterized in that the oxazoline is present in an amount of about 85 to about 100% and the amide and amino ester are present in amounts of about 0 to about 15% by weight. 21. An ink composition according to claim 2, characterized in that the product contains a mixture of an amide and an amino ester. 22. An ink composition according to claim 2, characterized in that the product contains an amide. 23. An ink composition according to claim 2, characterized in that the product contains an amino ester.