Compositions: coating or plastic – Coating or plastic compositions – Marking
Reexamination Certificate
2000-01-27
2001-10-16
Koslow, C. Melissa (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Marking
C106S031430, C106S031580, C106S031470
Reexamination Certificate
active
06302948
ABSTRACT:
FIELD OF THE INVENTION
The present invention is related to a textile ink-jet printing-purpose disperse dye micro-emulsion agent. It uses dispersing agents such as sodium polynaphthalene formaldehyde sulfonates, surfactants such as POE NP ether, silicone derivative emulsion-type defoaming agents and bactericidal fungicidal agents for ink-jet CMYK four-color disperse dyes and forms a stable dye micro-emulsion through micro-jetting homogenized emulsifier.
DESCRIPTION OF PRIOR ART
Agents of surfactants such as POE ether and other auxiliaries have been reported in the following literature:
a. Anion on-ion surfactants, such as polyoxyethylene ether, were used in U.S. Pat. Nos. 5,658,376, 5,749,952, and 5,226,957 for non-water-soluble pigment micro-emulsion dispersing agents.
b. Japanese patent Nos. 09071742, 09291235, and 09279489 show that disperse dye ink is also added with disperse agents (the use of glycerol and polyoxyethylene alkyl ether by Japanese patent No. 09071742), water-soluble macro-molecules (polyethylene oxide), and viscosity modifiers.
c. U.S. Pat. No. 5,047,084 mentioned the use of stearic acid, esterfied fatty acid, and mineral oil as media, the use of 25% of polyoxyethylene sorbitan monostearate, and bis (2-ethylhexyl) sulfosuccinic acid as surfactants, and the use of triethanolamine as a co-solvent. After these have been mixed and stirred evenly together, a black dye (typophorol) and a blue dye (sudan blue60) is then added and then heated to 85° C. to form a homogeneous micro-emulsion system, which offers a variety of material universality, rapid drying, continuous stable ink-jet effect to the foaming-pressure type inkjetting.
SUMMARY OF THE INVENTION
It is an objective of this invention to provide a textile ink-jet printing-purpose disperse dye micro-emulsion agent.
Disperse dyes should be made even dispersing in water by means of disperse agents or surfactants, but particles of such disperse dyes easily coagulate and precipitate after being left alone for some time. To produce this disperse dye ink for synthetic fibers, disperse dyes should evenly and stably disperse in a water medium and should not develop agglutination, quality changes, and precipitation, resulting in the blocking of the spray hole. In jetting to form ink drops on fibers, bleeding and color differences should not develop. The above-required properties can effectively be achieved by emulsion technology.
Micro-emulsion is defined as a thermodynamically stable and homogenized “solution”, which can maintain its stable condition in a frozen and molten medium, formed by water, oil, surfactants, co-surface reactive polymer and co-solvent. Water in the system provides a continuous phase and promotes the formation of micro-emulsion particles. Oil refers to the non-continuous phase in which non-water-soluble substances will be surrounded by micro-emulsion drops. Surfactants are primarily the dual-surface reactive substances that produce micro-emulsion drops. Co-surface reactive agents surround every micro-emulsion drop to stabilize the entire micro-emulsion. Polymers surround the micro-emulsion drops, stabilizing and promoting the viscosity. The addition of a co-solvent can prevent an oil phase (such as dyes/paints) from drying so as to block the spray hole through its high-steam air pressure by the action of stabilizing micro-emulsion.
The formed micro-emulsified dyes will produce a great dripping wet force on the ink-jet minerals due to an exceedingly high concentration of organic solvents and surfactants, resulting in bleeding and poor line sharpness. In prior art, such as U.S. Pat. No. 5,047,084, a pre-heating apparatus was installed in the spray head and ink-jet printer to keep the ink in a homogeneous and rapidly dry liquid state. However, this method is too complicated and expensive. In U.S. Pat. No. 5,342,440, water-soluble dyes were added in the b lack and colored ink to reduce line bleeding. Amine oxide was used as a surfactant, lactic, glycol ether, and long chain alcohol were used as co-surface reactive agents, and co-solvents included glycol, diol, ketone, and glycerol derivatives. The above agent was mixed according to their designated ratios.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENT
The non-plate printing in this invention applies to the disperse-dye micro-emulsion agent, which is an environmental protective and low-cost agent, can increase the ink storage and ink-jet stability, and achieve a good jet -printing effect.
In other words, this invention is relates to a method for producting a textile ink-jet printing-purpose disperse dye micro-emulsion agent, which uses the presscake of disperse dyes for the dispersing agents of sodium polynaphthalene formaldhyde sulfonates to give excellent dispersion, heat-proof ability, and the ability of not forming foams—while producing bright colors. After dispersing for 12 hours and filtering to remove impurities, this micro-emulsion agent is then applied as follows: surfactants such as P.O.E. Ether, high-molecule alcohol polyethylene glycol ether, CMC co-polymers, co-solvent, silicone defoaming agent, and thiazole bactericidal fungicidal agents, and then add de-ion water proportionally to reach the appropriate percentage. After stirring even, rapidly homogenize and emulsify these with a micro-jet homogenizing emulsifier to form a micro-emulsion system (with the diameter of dye particles below 500 nm).
The above-mentioned presscake of dispersing dyes should be 100% pure and can be matched with three primary colors (light-, medium-, dark-, and bright-colored) and black color from a wide range of colors. For example:
C.I. Disperse Blue 60, 73, 79, 87, 268, etc . . .
C.I. Disperse Red 60, 82, 91, 92, etc . . .
C.I. Disperse Yellow 33, 64, 114, 119, 186, 198, 211, 224, etc . . . .
The black color is the mixture of three primary colors. Dyes are waterproof with sublimation and light fastness of at least 3. The above properties can guarantee stability of the agent without blocking the jet hole and color-light stability.
The above-mentioned dispersing agents such as sodium polynaphthalene formaldehyde sulfonates should have their effective contents lying within 80 to 95% and the composition of sulfonates within 1.0 to 9.0%, and a pH value lying between 7 and 9.
The general agent of the above-mentioned surfactants such as polyoxyethylene nonyl phenol ether (POE NP ether) is stated as follows:
C
15
H
23
—(—CH
2
CH
2
O—)
A
—H
A(Number of moles)=7~100
The selected HLB value lies between 12 and 20, pH=6~7, and the clouding point lies between 50 and 100° C., with the power to form O/W micro-emulsion particles with disperse dyes and a diameter between 100 and 300 mm, forming a highly soluble, highly stable, and homogenized system. Owing to its neutrality, it does not damage the ink case and can be compatible with the dispersing agents and other auxiliaries of the agent.
The above-mentioned co-surface reactive agents include nonyl phenol polyethylene glycol ether, high alcohol polyethylene glycol ether, fatty alcohol polyethylene glycol ether, and polyoxyethylene sorbitan fatty acid ether. The HLB value should be selected over 15 with a pH value lying between 5 and 8, and be compatible with the above-mentioned surfactants and dyes, resulting in the promoting of the emulsification of dyes and stabilization of the dispersion.
The above-mentioned co-polymers are highly water-soluble and have low biodegradable etherized carboxymethyl cellulose with the composition between 0.5 and 2.5 wt %, viscosity range between 1 and 6 C.P. for ink, and the power to increase the stability of the micro-emulsion. With the increase in the etherization, its water affinity becomes lower, but the promotion of viscosity becomes more noticeable.
The above-mentioned co-solvent should have the following properties: high blowing point, high surface tension, high dye solubility, water affinity, low viscosity, and low odor; for example, ethylene glycol monoethyl ether, methyl carbitaol, ethyl carbitol, triethylene glycol monobuthyl ether, N-methyl-2-pyrrolidone, 1,3-Dimethyl im
Chang Shiau Yin Peggy
Chen Chong Yu
Chen Wen Tung
Lin Cheng Kun
China Textile Institute
Faison Veronica F.
Koslow C. Melissa
Rosenberg , Klein & Lee
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