CN114958492A - Water-based plate cleaning solution with good stability and preparation method thereof - Google Patents
Water-based plate cleaning solution with good stability and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/72—Ethers of polyoxyalkylene glycols
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D9/00—Chemical paint or ink removers
- C09D9/04—Chemical paint or ink removers with surface-active agents
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/06—Phosphates, including polyphosphates
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/12—Water-insoluble compounds
- C11D3/1213—Oxides or hydroxides, e.g. Al2O3, TiO2, CaO or Ca(OH)2
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- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/12—Water-insoluble compounds
- C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
- C11D3/1246—Silicates, e.g. diatomaceous earth
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- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/18—Hydrocarbons
- C11D3/182—Hydrocarbons branched
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- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
- C11D3/2003—Alcohols; Phenols
- C11D3/2006—Monohydric alcohols
- C11D3/201—Monohydric alcohols linear
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- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
- C11D3/2075—Carboxylic acids-salts thereof
- C11D3/2086—Hydroxy carboxylic acids-salts thereof
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- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
- C11D3/22—Carbohydrates or derivatives thereof
- C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
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- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/26—Organic compounds containing nitrogen
- C11D3/30—Amines; Substituted amines ; Quaternized amines
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- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/34—Organic compounds containing sulfur
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Abstract
The invention discloses a water-based plate cleaning solution with good stability and a preparation method thereof. According to the invention, the two-component surfactant is formed by compounding, so that the plate cleaning liquid is easy to react with ink dirt, and the ink dirt dissolving capacity of the plate cleaning liquid is improved; the microemulsion is prepared from the n-butyl alcohol, the high distillation range isoparaffin and the deionized water, so that the layout is not damaged, the microemulsion area is increased by adding the n-butyl alcohol, and the thermal stability of the emulsion is improved; the modified silicon dioxide microspheres are prepared by an emulsion polymerization one-step method, the surface activity and the thermal stability of the nano silicon dioxide microspheres are improved by in-situ hydrophobic modification, so that the nano silicon dioxide microspheres can be uniformly distributed in a system without agglomeration, and scratches on the surface of a printing plate can be effectively repaired by matching with dimethyl sulfate.
Description
Technical Field
The invention relates to the technical field of PS/CTP printing, in particular to a water-based plate cleaning solution with good stability and a preparation method thereof.
Background
The plate cleaning liquid is a daily cleaning and scratch remover for PS plates/CTP plates, and mainly has the functions of removing residual ink, scratches, oxides, oil stains and other components on the plate surface to ensure the clarity of printed images and prolong the service life of printing plates. However, the prior plate cleaning liquid only has the function of removing oil stains on the plate surface, and cannot play a certain role in protecting and repairing the plate surface.
The same applicant of the present application previously filed a dual-purpose plate cleaning solution for plate decontamination and scratch removal and a preparation method thereof (publication number is CN 113214910A), which reduces the probability of scratching or scratching the surface of a printing plate by using spherical silica sol; the decontamination effect of the plate cleaning liquid is endowed by compounding sodium dodecyl benzene sulfonate and citric acid; the scratch on the surface of the printing plate is repaired by the synergistic action between the dimethyl sulfate and the repair assistant. The technology has certain cleaning effect, protects the printing plate to the maximum extent, prolongs the service life of the printing plate, but in the practical application process, as the main solvent of the plate cleaning solution is water, the adhesiveness of the water is poor, the decontamination effect of the plate cleaning solution cannot be exerted to the maximum extent, and meanwhile, the water per se has poor dissolving capacity for ink dirt, so that the prepared plate cleaning solution has limited cleaning capacity; silica sols tend to agglomerate when stored for long periods of time in the system.
Patent document CN104263562A discloses a decontamination repairing plate cleaning solution for PS/CTP plates and a preparation method thereof, which adjusts the viscosity of the plate cleaning solution by oxidizing starch, so that the dirt is more easily scrubbed and the generation of scratches can be prevented. The emulsion prepared by the technology can clean the printing plate more effectively, so that dirt is easier to scrub, but the emulsion is not thermodynamically stable, the effective components in the printing plate cleaning solution are easy to inactivate in the storage process or the use process, and the cleaning capability is reduced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the water-based plate cleaning solution with good stability and the preparation method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a water-based plate cleaning solution with good stability is prepared from the following raw materials in parts by weight: 5-8 parts of Arabic gum, 1-1.5 parts of phosphoric acid, 5-6 parts of citric acid monohydrate, 1-3 parts of nonylphenol polyoxyethylene ether, 0.5-1 part of triethanolamine, 1-3 parts of n-butanol, 5-8 parts of potassium feldspar powder, 50-55 parts of high-distillation-range isoparaffin, 0.8-1.0 part of modified silica microspheres, 0.5-0.6 part of dimethyl sulfate and 25-30 parts of deionized water, wherein the high-distillation-range isoparaffin is a composition of isododecane and isohexadecane.
The modified silicon dioxide microsphere is prepared from the following raw materials in parts by weight: 20-25 parts of nano silicon dioxide, 5-10 parts of hexadecyl trimethyl ammonium bromide, 3-5 parts of polymethylhydrosiloxane, 15-20 parts of vinyl-terminated polydimethylsiloxane and 1-2 parts of chloroplatinic acid.
The preparation method of the modified silica microspheres comprises the following steps:
(1) and weighing the cetyl trimethyl ammonium bromide and the nano silicon dioxide in parts by weight, and adding the cetyl trimethyl ammonium bromide and the nano silicon dioxide into an ultrasonic dispersion instrument for ultrasonic dispersion for 1-2min to obtain dispersion liquid for later use.
(2) And weighing the polymethylhydrosiloxane and the vinyl-terminated polydimethylsiloxane in parts by weight according to the proportion of 1:1, adding the polymethylhydrosiloxane and the vinyl-terminated polydimethylsiloxane into a container, and uniformly stirring the mixture at the stirring speed of 60-70r/min for 1-2min to obtain a mixed solution for later use.
(3) And pouring the mixed solution into the dispersion liquid, adding chloroplatinic acid in parts by weight for catalysis, and starting stirring at the stirring speed of 200-250r/min for 3-4min to obtain the modified silicon dioxide microspheres.
The ratio of isododecane to isohexadecane was 1: 2.
A method of preparing a plate cleaner as described above, comprising the steps of:
(1) two-component surfactant: adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in parts by weight into an emulsifying pot at the temperature of 25 ℃, adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in a ratio of 3:1:3, heating the mixture to 40-45 ℃ in a water bath, and stirring the mixture for 10-15 minutes by a magnetic stirrer while heating the mixture in the water bath to obtain the bi-component surfactant.
(2) And preparing the microemulsion: adding the high distillation range isoparaffin, the modified silica microspheres and the dimethyl sulfate into the bi-component surfactant in parts by weight, stirring by a magnetic stirrer, heating to 50-55 ℃ while stirring, stirring until the system is uniform, and finally dropwise adding the deionized water in parts by weight into the bi-component surfactant for 1-1.5 minutes by a flow injection device to obtain the microemulsion.
(3) And acidification: adding the phosphoric acid and the citric acid monohydrate in parts by weight into the microemulsion, and heating to 56-60 ℃ while stirring to obtain the acidified emulsion.
(4) And adding a thickening agent: transferring the acidified emulsion into a stirring kettle, adding the Arabic gum and the potassium feldspar powder in parts by weight, stirring at a low speed of 400r/min for 2-3h at a speed of 200-.
(5) And filtering: naturally cooling the crude product to room temperature, and filtering by using a filter, wherein the filtering fineness of the filter is 400-500 meshes, and the filtrate is a finished product of the plate cleaning liquid.
The invention has the beneficial effects that:
1. the plate cleaning liquid disclosed by the invention forms the bi-component surfactant by compounding the nonylphenol polyoxyethylene ether and the triethanolamine, so that the plate cleaning liquid is easy to react with ink dirt, the ink dirt is promoted to flocculate, and the ink dirt dissolving capacity of the plate cleaning liquid is improved.
2. The microemulsion is prepared by adding the n-butyl alcohol, the high distillation range isoparaffin and the deionized water on the basis of the bi-component surfactant, and the microemulsion does not damage the layout, wherein the addition of the n-butyl alcohol increases the microemulsion area, reduces the interfacial tension of the microemulsion, improves the thermal stability of the emulsion and is beneficial to storage; moreover, the oil phase in the solvent adopts high-distillation-range isoparaffin, the decontamination performance is improved, no residual feeling is generated, the relatively inertia of the isoparaffin structure enables the isoparaffin to have excellent corrosion resistance, the isoparaffin is not easy to react with air to form a coating structure, and the active ingredients in the emulsion are not inactivated.
3. The modified silicon dioxide microspheres are prepared by an emulsion polymerization one-step method, the surface activity and the thermal stability of the nano silicon dioxide microspheres are improved by in-situ hydrophobic modification, and the nano silicon dioxide microspheres can be uniformly distributed and do not agglomerate in a system.
Detailed Description
In all the examples of the present invention, the temperature and pressure are not particularly emphasized, and are both normal temperature and normal pressure, and the equipment use is not particularly described, and the equipment can be used according to the conventional setting.
The microemulsion is composed of a surfactant, a cosurfactant, oil and a water phase, is a spontaneously formed thermodynamically stable system with single optical isotropy, is transparent or semitransparent in appearance, and has a nano-scale droplet size of a disperse phase. Compared with the common emulsion, the microemulsion has the following significant difference: (1) the microemulsion is a thermodynamically stable system, and the emulsion is a thermodynamically unstable system; (2) microemulsions are transparent or translucent in appearance, but emulsions are generally milky in color; (3) in contrast to the preparation process, microemulsions may form spontaneously or require only a small amount of energy, such as stirring, etc., but emulsions require a large energy input for their preparation. In the preparation of single-phase microemulsions, ionic and nonionic surfactants are commonly used in order to effectively increase the microemulsion area.
The plate cleaning liquid is prepared from the following raw materials in parts by weight: 5-8 parts of Arabic gum, 1-1.5 parts of phosphoric acid, 5-6 parts of citric acid monohydrate, 1-3 parts of nonylphenol polyoxyethylene ether, 0.5-1 part of triethanolamine, 1-3 parts of n-butanol, 5-8 parts of potassium feldspar powder, 50-55 parts of high-distillation-range isoparaffin, 0.8-1.0 part of modified silica microspheres, 0.5-0.6 part of dimethyl sulfate and 25-30 parts of water, wherein the high-distillation-range isoparaffin is a composition of isododecane and isohexadecane, and the ratio of the isododecane to the isohexadecane is 1: 2.
Gum arabic is used as a thickener in this application, available from south kyoto pine crown biotechnology limited. The water-based plate cleaning liquid has poor adhesion effect on the plate surfaces of the PS plate and the CTP plate, needs to be added with a thickening agent to increase the viscosity of a system and increase the adhesion time of the plate cleaning liquid for better playing a role, and can also prevent the damage caused by acid splashing.
Phosphoric acid and citric acid monohydrate are used as acid agents in the present application, both available from Xin chemical products, Inc., of Henan, Inc., and are mainly used for rust and rust prevention. Phosphoric acid is oxyacid of pentavalent phosphorus, is used for metal surface phosphating treatment, and simultaneously adjusts the pH value in a system; citric acid monohydrate is an organic acid with weak acidity, has small corrosiveness to metals, has good chelation effect on most of divalent and trivalent particles, has poor effect on removing silicon, magnesium and aluminum scales, and can effectively remove oxides and rust scales on a printing surface by being matched with phosphoric acid.
Nonylphenol polyoxyethylene ether, used as a surfactant in the present application, is a nonionic surfactant available from jon taiwang chemical co; triethanolamine, which is also used as a surfactant in the present application, is an anionic surfactant available from Yunnan chemical Limited of Jinan. The nonylphenol polyoxyethylene ether and the triethanolamine are compounded to form a mixed micelle in a solution, so that the critical micelle concentration of the surfactant is greatly reduced, and the cleanliness of the plate cleaning solution is improved.
The n-butanol is a cosurfactant and is purchased from chemical reagents of national drug group, Inc. The Hydrophilic Lipophilic Balance (HLB) and Critical Packing Parameter (CPP) can explain the behavior of the surfactant, the HLB reflects the relative contribution of hydrophilic and hydrophilic groups in the surfactant, low HLB (3-6) facilitates the preparation of water-in-oil microemulsions, high HLB (8-18) facilitates the preparation of oil-in-water microemulsions, when the HLB is too high, the addition of a co-surfactant is required to adjust the HLB to a reasonable range for the formation of microemulsions, when microemulsions are formed, the surfactant molecules will migrate to the oil-water interface, lowering the interfacial tension of the microemulsions, micelles will form when CMC is reached, and then with the continued addition of surfactant, the interfacial tension will not be reduced, thus requiring the addition of a second co-surfactant. Alcohol with medium chain length is often selected as a surfactant, and simultaneously, a rigid hydrocarbon area of an interface film is liquefied, so that the interface film is induced to become ideal curvature, the flexibility of an interface is improved, the interface fluidity and the entropy value of a system are increased, and the solubility of the alcohol can be influenced according to the distribution of the alcohol in oil-water two phases.
The potassium feldspar powder also has a thickening effect in the system, and when the potassium feldspar powder is compounded with the Arabic gum for use, the sticky texture in the system is more uniform, and no granular feeling exists.
The high distillation range isoparaffin solvent oil is the highest product of the environment-friendly solvent oil, is used as the solvent oil with narrower distillation range in the hydrocarbon solvent, and has higher added value and wider economic prospect at present. Isoparaffinic solvents are the best choice for many industrial cleaning applications and can be used to replace chlorinated solvents, mineral oil and kerosene-based cleaning fluids, and the high purity of the isomerate, coupled with the relative inertness of the saturated isoparaffinic structure, minimizes or eliminates the detrimental reactions in the industrial process.
The modified silicon dioxide microspheres are prepared by an emulsion polymerization one-step method, and the surface activity and the thermal stability of the nano silicon dioxide microspheres are improved by in-situ hydrophobic modification, so that the plate cleaning solution provided by the invention can be uniformly coated on the surface of a printing plate, and a protective film can be formed on the surface of the printing plate after curing, so that the plate cleaning solution not only can be tightly covered on a plate surface and can prevent an oxide layer of the plate surface from directly contacting with air, but also can not be agglomerated after being stored for a long time. Moreover, since the modified silica microspheres are spherical structures, the modified silica microspheres can effectively reduce the surface cover of the printing plateThe probability of scratching or scuffing ensures the safety and the quality of the printing plate, and in addition, dimethyl sulfate (molecular formula: C) 2 H 6 O 4 S) and the modified silica microspheres can generate a synergistic effect, so that scratches on the surface of the printing plate can be effectively repaired, the continuous use of the printing plate is ensured, and the service life of the printing plate is prolonged.
The modified silicon dioxide microspheres are prepared from the following raw materials in parts by weight: 20-25 parts of nano silicon dioxide (purchased from Funans super Italian chemical Co., Ltd.), 5-10 parts of hexadecyl trimethyl ammonium bromide (purchased from Weifang Youylan chemical Co., Ltd.), 3-5 parts of polymethylhydrosiloxane (purchased from Shandong Yingsheng Biotech Co., Ltd.), 15-20 parts of vinyl-terminated polydimethylsiloxane (purchased from Handa Fei Biotech Co., Ltd., Hubei) and 1-2 parts of chloroplatinic acid (purchased from Shandong Polychem chemical Co., Ltd.).
The preparation method of the modified silicon dioxide microspheres comprises the following steps:
(1) and weighing the cetyl trimethyl ammonium bromide and the nano silicon dioxide in parts by weight, and adding the cetyl trimethyl ammonium bromide and the nano silicon dioxide into an ultrasonic dispersion instrument for ultrasonic dispersion for 1-2min to obtain dispersion liquid for later use.
(2) And weighing the polymethylhydrosiloxane and the vinyl-terminated polydimethylsiloxane in parts by weight according to the proportion of 1:1, adding the polymethylhydrosiloxane and the vinyl-terminated polydimethylsiloxane into a container, and uniformly stirring the mixture at the stirring speed of 60-70r/min for 1-2min to obtain a mixed solution for later use.
(3) And pouring the mixed solution into the dispersion liquid, adding chloroplatinic acid in parts by weight for catalysis, and starting stirring at the stirring speed of 200-250r/min for 3-4min to obtain the modified silicon dioxide microspheres.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
Example 1: 5 parts of Arabic gum, 1 part of phosphoric acid, 5 parts of citric acid monohydrate, 1 part of nonylphenol polyoxyethylene ether, 0.5 part of triethanolamine, 1 part of n-butanol, 5 parts of potassium feldspar powder, 50 parts of high-distillation-range isoparaffin, 0.8 part of modified silica microspheres, 0.5 part of dimethyl sulfate and 25 parts of water, wherein the high-distillation-range isoparaffin is a composition of isododecane and isohexadecane, and the ratio of the isododecane to the isohexadecane is 1: 2.
Preparation of example 1: adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in parts by weight into an emulsifying pot at the temperature of 25 ℃, adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in a ratio of 2:1:2, heating the mixture to 40-45 ℃ in a water bath, and stirring the mixture for 10-15 minutes by a magnetic stirrer while heating the mixture in the water bath to prepare a bi-component surfactant; adding the high distillation range isoparaffin, the modified silica microspheres and the dimethyl sulfate into the bi-component surfactant in parts by weight, stirring by a magnetic stirrer, heating to 50-55 ℃ while stirring, stirring until the system is uniform, and finally dropwise adding the deionized water in parts by weight into the bi-component surfactant for 1-1.5 minutes by a flow injection device to prepare a microemulsion; adding the phosphoric acid and the citric acid monohydrate in parts by weight into the microemulsion, and heating to 56-60 ℃ while stirring to obtain an acidified emulsion; transferring the acidified emulsion into a stirring kettle, adding the Arabic gum and the potassium feldspar powder in parts by weight, stirring at a low speed of 400r/min for 2-3h at a speed of 200-; the crude product was naturally cooled to room temperature and then filtered by a filter, the filter fineness of which was 400-500 mesh, the filtrate was example 1.
Example 2: 6 parts of Arabic gum, 1.2 parts of phosphoric acid, 5.5 parts of citric acid monohydrate, 2 parts of nonylphenol polyoxyethylene ether, 0.8 part of triethanolamine, 2 parts of n-butanol, 6 parts of potassium feldspar powder, 53 parts of high-distillation-range isoparaffin, 0.9 part of modified silica microspheres, 0.6 part of dimethyl sulfate and 28 parts of water, wherein the high-distillation-range isoparaffin is a composition of isododecane and isohexadecane, and the ratio of the isododecane to the isohexadecane is 1: 2.
Example 2 preparation method: adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in parts by weight into an emulsifying pot at the temperature of 25 ℃, adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in a ratio of 2:0.8:2, heating the mixture to 40-45 ℃ in a water bath, and stirring the mixture for 10-15 minutes by a magnetic stirrer while heating the mixture in the water bath to prepare a bi-component surfactant; adding the high distillation range isoparaffin, the modified silica microspheres and the dimethyl sulfate into the bi-component surfactant in parts by weight, stirring by a magnetic stirrer, heating to 50-55 ℃ while stirring, stirring until the system is uniform, and finally dropwise adding the deionized water in parts by weight into the bi-component surfactant for 1-1.5 minutes by a flow injection device to prepare a microemulsion; adding the phosphoric acid and the citric acid monohydrate in parts by weight into the microemulsion, and heating to 56-60 ℃ while stirring to obtain an acidified emulsion; transferring the acidified emulsion into a stirring kettle, adding the Arabic gum and the potassium feldspar powder in parts by weight, stirring at a low speed of 400r/min for 2-3h at a speed of 200-; the crude product was naturally cooled to room temperature and then filtered by a filter, the filter fineness of which was 400-500 mesh, the filtrate was example 2.
Example 3: 8 parts of Arabic gum, 1.5 parts of phosphoric acid, 6 parts of citric acid monohydrate, 3 parts of nonylphenol polyoxyethylene ether, 1 part of triethanolamine, 3 parts of n-butanol, 8 parts of potassium feldspar powder, 55 parts of high-distillation-range isoparaffin, 1.0 part of modified silica microspheres, 0.6 part of dimethyl sulfate and 30 parts of water, wherein the high-distillation-range isoparaffin is a composition of isododecane and isohexadecane, and the ratio of the isododecane to the isohexadecane is 1: 2.
Example 3 preparation method: adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in parts by weight into an emulsifying pot at the temperature of 25 ℃, adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in a ratio of 3:1:3, heating the mixture to 40-45 ℃ in a water bath, and stirring the mixture for 10-15 minutes by a magnetic stirrer while heating the mixture in the water bath to prepare a bi-component surfactant; adding the high distillation range isoparaffin, the modified silica microspheres and the dimethyl sulfate into the bi-component surfactant in parts by weight, stirring by a magnetic stirrer, heating to 50-55 ℃ while stirring, stirring until the system is uniform, and finally dropwise adding the deionized water in parts by weight into the bi-component surfactant for 1-1.5 minutes by a flow injection device to prepare a microemulsion; adding the phosphoric acid and the citric acid monohydrate in parts by weight into the microemulsion, and heating to 56-60 ℃ while stirring to obtain an acidified emulsion; transferring the acidified emulsion into a stirring kettle, adding the Arabic gum and the potassium feldspar powder in parts by weight, stirring at a low speed of 400r/min for 2-3h at a speed of 200-; the crude product is naturally cooled to room temperature and then filtered by a filter, the filter fineness of the filter is 400-500 meshes, and the filtrate is the example 3.
Example 4: 5 parts of Arabic gum, 1 part of phosphoric acid, 5 parts of citric acid monohydrate, 3 parts of nonylphenol polyoxyethylene ether, 1 part of triethanolamine, 3 parts of n-butanol, 5 parts of potassium feldspar powder, 50 parts of high-distillation-range isoparaffin, 0.8 part of modified silica microspheres, 0.5 part of dimethyl sulfate and 25 parts of water, wherein the high-distillation-range isoparaffin is a composition of isododecane and isohexadecane, and the ratio of the isododecane to the isohexadecane is 1: 1.
Example 4 preparation method: adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in parts by weight into an emulsifying pot at the temperature of 25 ℃, adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in a ratio of 3:1:3, heating the mixture to 40-45 ℃ in a water bath, and stirring the mixture for 10-15 minutes by a magnetic stirrer while heating the mixture in the water bath to prepare a bi-component surfactant; adding the high distillation range isoparaffin, the modified silica microspheres and the dimethyl sulfate into the bi-component surfactant in parts by weight, stirring by a magnetic stirrer, heating to 50-55 ℃ while stirring, stirring until the system is uniform, and finally dropwise adding the deionized water in parts by weight into the bi-component surfactant for 1-1.5 minutes by a flow injection device to prepare a microemulsion; adding the phosphoric acid and the citric acid monohydrate in parts by weight into the microemulsion, and heating to 56-60 ℃ while stirring to obtain an acidified emulsion; transferring the acidified emulsion into a stirring kettle, adding the Arabic gum and the potassium feldspar powder in parts by weight, stirring at a low speed of 400r/min for 2-3h at a speed of 200-; the crude product was naturally cooled to room temperature and then filtered by a filter, the filter fineness of which was 400-500 mesh, the filtrate was example 4.
Comparative example 1: 1.0 part of Arabic gum, 0.5 part of polyvinyl alcohol, 0.8 part of hydroxyethyl cellulose, 0.53 part of nano potassium feldspar powder, 0.7 part of sodium dodecyl benzene sulfonate, 0.3 part of castor oil, 0.2 part of squalane, 0.7 part of repair auxiliary agent, 0.4 part of dimethyl sulfate, 0.32 part of dextrin, 0.3 part of citric acid, 1.0 part of phosphoric acid, 0.4 part of triethanolamine, 0.4 part of D-mannitol and 40 parts of deionized water.
Preparation of comparative example 1: weighing the raw materials according to the two formulas respectively, adding deionized water into a mixing device, raising the temperature of water obtained in the mixing device to 50 ℃, adding arabic gum, polyvinyl alcohol and hydroxyethyl cellulose into the mixing device, stirring at a low speed of 200r/min for 2 hours, and then stirring at a high speed of 1000r/min for 2 hours; then transferring the rest raw materials into mixing equipment, and continuously mechanically stirring at the speed of 800r/min for 1 h; after the stirring was completed, the obtained material was naturally cooled to room temperature and then sieved through a 400 mesh sieve, to obtain comparative example 1.
Comparative example 2: 5 parts of Arabic gum, 1 part of phosphoric acid, 5 parts of citric acid monohydrate, 3 parts of nonylphenol polyoxyethylene ether, 3 parts of span-801, 3 parts of n-butanol, 5 parts of potassium feldspar powder, 50 parts of high-distillation-range isoparaffin, 0.8 part of modified silica microspheres, 0.5 part of dimethyl sulfate and 25 parts of water, wherein the high-distillation-range isoparaffin is a composition of isododecane and isohexadecane, and the ratio of the isododecane to the isohexadecane is 1: 2.
Preparation of comparative example 2: adding the nonylphenol polyoxyethylene ether, the span-80 and the n-butyl alcohol in parts by weight into an emulsifying pot at the temperature of 25 ℃, adding the nonylphenol polyoxyethylene ether, the span-80 and the n-butyl alcohol in a ratio of 3:1:3, heating the mixture in a water bath to 40-45 ℃, and stirring the mixture for 10-15 minutes by using a magnetic stirrer while heating the mixture in the water bath to prepare a bi-component surfactant; adding the high distillation range isoparaffin, the modified silica microspheres and the dimethyl sulfate into the bi-component surfactant in parts by weight, stirring by a magnetic stirrer, heating to 50-55 ℃ while stirring, stirring until the system is uniform, and finally dropwise adding the deionized water in parts by weight into the bi-component surfactant for 1-1.5 minutes by a flow injection device to prepare a microemulsion; adding the phosphoric acid and the citric acid monohydrate in parts by weight into the microemulsion, and heating to 56-60 ℃ while stirring to obtain an acidified emulsion; transferring the acidified emulsion into a stirring kettle, adding the Arabic gum and the potassium feldspar powder in parts by weight, stirring at a low speed of 400r/min for 2-3h at a speed of 200-; the crude product was naturally cooled to room temperature and then filtered through a filter having a filter fineness of 400-500 mesh, the filtrate being comparative example 2.
Comparative example 3: 5 parts of Arabic gum, 1 part of phosphoric acid, 5 parts of citric acid monohydrate, 3 parts of nonylphenol polyoxyethylene ether, 1 part of triethanolamine, 3 parts of n-butanol, 5 parts of potassium feldspar powder, 50 parts of isobutane, 0.8 part of modified silica microspheres, 0.5 part of dimethyl sulfate and 25 parts of water.
Preparation of comparative example 3: adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in parts by weight into an emulsifying pot at the temperature of 25 ℃, adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in a ratio of 3:1:3, heating the mixture to 40-45 ℃ in a water bath, and stirring the mixture for 10-15 minutes by a magnetic stirrer while heating the mixture in the water bath to prepare a bi-component surfactant; adding the isobutane, the modified silica microspheres and the dimethyl sulfate in parts by weight into a bi-component surfactant, stirring by using a magnetic stirrer, heating to 50-55 ℃ while stirring, stirring until the system is uniform, and finally dropwise adding the deionized water in parts by weight into the bi-component surfactant for 1-1.5 minutes by using a flow injection device to prepare the microemulsion; adding the phosphoric acid and the citric acid monohydrate in parts by weight into the microemulsion, and heating to 56-60 ℃ while stirring to obtain an acidified emulsion; transferring the acidified emulsion into a stirring kettle, adding the Arabic gum and the potassium feldspar powder in parts by weight, stirring at a low speed of 400r/min for 2-3h at a speed of 200-; the crude product was naturally cooled to room temperature and then filtered through a filter having a filter fineness of 400-500 mesh, the filtrate was comparative example 3.
Comparative example 4: 5 parts of Arabic gum, 1 part of phosphoric acid, 5 parts of citric acid monohydrate, 3 parts of nonylphenol polyoxyethylene ether, 1 part of triethanolamine, 3 parts of n-butanol, 5 parts of potassium feldspar powder, 50 parts of isododecane, 0.8 part of modified silica microspheres, 0.5 part of dimethyl sulfate and 25 parts of water.
Preparation of comparative example 4: adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in parts by weight into an emulsifying pot at the temperature of 25 ℃, adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in a ratio of 3:1:3, heating the mixture to 40-45 ℃ in a water bath, and stirring the mixture for 10-15 minutes by a magnetic stirrer while heating the mixture in the water bath to prepare a bi-component surfactant; adding the isododecane, the modified silica microspheres and the dimethyl sulfate in parts by weight into a bi-component surfactant, stirring by a magnetic stirrer, heating to 50-55 ℃ while stirring, stirring until the system is uniform, and finally dropwise adding the deionized water in parts by weight into the bi-component surfactant by a flow injection device for 1-1.5 minutes to prepare a microemulsion; adding the phosphoric acid and the citric acid monohydrate in parts by weight into the microemulsion, and heating to 56-60 ℃ while stirring to obtain an acidified emulsion; transferring the acidified emulsion into a stirring kettle, adding the Arabic gum and the potassium feldspar powder in parts by weight, stirring at a low speed of 200-400r/min for 2-3h, and then stirring at a high speed of 1000-1500r/min for 2-3h to prepare a crude product; the crude product was naturally cooled to room temperature and then filtered through a filter having a filter fineness of 400-500 mesh, the filtrate being comparative example 4.
From the analysis of the data, the plate cleaning solution disclosed by the invention forms a bi-component surfactant by compounding the nonylphenol polyoxyethylene ether and the triethanolamine, so that the plate cleaning solution is easy to react with ink dirt, the ink dirt is promoted to flocculate, the ink dirt dissolving capacity of the plate cleaning solution is improved, the bi-component surfactant is matched with the dispersibility and the adhesiveness of the microemulsion, the decontamination effect of the plate cleaning solution can be effectively exerted, and the dirt residue rate is less than 0.005%; the microemulsion is prepared by adding n-butyl alcohol, high distillation range isoparaffin and deionized water on the basis of the bi-component surfactant, and the microemulsion does not damage the layout, wherein the addition of the n-butyl alcohol increases the microemulsion area, reduces the interfacial tension of the microemulsion, improves the thermal stability of the emulsion and is beneficial to storage; moreover, the oil phase in the solvent adopts high-boiling-range isoparaffin, so that the decontamination performance is improved without residual feeling, the relatively inertia of the isoparaffin structure ensures that the isoparaffin has excellent corrosion resistance, is not easy to react with air to form a coating structure, does not inactivate active ingredients in the emulsion, and improves the storage stability of the emulsion.
Applicants have further discovered that the use of relatively high exfoliating surfactants such as span80 and isooctanol polyoxyethylene ether, tend to abrade the plate surface during cleaning and are not repairable and affect the useful life of the plate surface, whereas the two-component surfactants used in the present invention do not abrade the plate surface during cleaning.
Meanwhile, the applicant finds that the proportion between isododecane and isomexadecane has a direct influence on the final storage stability and the cleanliness of the plate cleaning solution, a specific mechanism is still researched, and detailed experimental data are not formed yet, but the existing data show that when the weight part of isododecane is larger than or close to that of isomexadecane, an oil film appears on the surface of an emulsion after the plate cleaning solution is stood for a long time, and the cleanliness of the plate cleaning solution per se is reduced.
The above embodiments do not limit the scope of the invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention as claimed.
Claims (5)
1. A water-based plate cleaning solution with good stability is characterized by being prepared from the following raw materials in parts by weight: 5-8 parts of Arabic gum, 1-1.5 parts of phosphoric acid, 5-6 parts of citric acid monohydrate, 1-3 parts of nonylphenol polyoxyethylene ether, 0.5-1 part of triethanolamine, 1-3 parts of n-butanol, 5-8 parts of potassium feldspar powder, 50-55 parts of high-distillation-range isoparaffin, 0.8-1.0 part of modified silica microspheres, 0.5-0.6 part of dimethyl sulfate and 25-30 parts of deionized water, wherein the high-distillation-range isoparaffin is a composition of isododecane and isohexadecane.
2. The plate cleaning solution as claimed in claim 1, wherein the modified silica microspheres are prepared from the following raw materials in parts by weight: 20-25 parts of nano silicon dioxide, 5-10 parts of hexadecyl trimethyl ammonium bromide, 3-5 parts of polymethylhydrosiloxane, 15-20 parts of vinyl-terminated polydimethylsiloxane and 1-2 parts of chloroplatinic acid.
3. The plate cleaner according to claim 2, characterized in that the preparation method of the modified silica microspheres is as follows:
(1) weighing the cetyl trimethyl ammonium bromide and the nano silicon dioxide in parts by weight, and adding the cetyl trimethyl ammonium bromide and the nano silicon dioxide into an ultrasonic dispersion instrument for ultrasonic dispersion for 1-2min to obtain dispersion liquid for later use;
(2) weighing the polymethylhydrosiloxane and the vinyl-terminated polydimethylsiloxane in parts by weight according to the proportion of 1:1, adding the polymethylhydrosiloxane and the vinyl-terminated polydimethylsiloxane into a container, and uniformly stirring the mixture at the stirring speed of 60-70r/min for 1-2min to obtain a mixed solution for later use;
(3) and pouring the mixed solution into the dispersion liquid, adding chloroplatinic acid in parts by weight for catalysis, and starting stirring at the stirring speed of 200-250r/min for 3-4min to obtain the modified silicon dioxide microspheres.
4. The fountain solution of claim 1, wherein the ratio of isododecane to isohexadecane is 1: 2.
5. A process for preparing a plate cleaner according to any one of claims 1 to 4, characterized by comprising the steps of:
(1) two-component surfactant: adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in parts by weight into an emulsifying pot at the temperature of 25 ℃, adding the nonylphenol polyoxyethylene ether, the triethanolamine and the n-butyl alcohol in a ratio of 3:1:3, heating the mixture to 40-45 ℃ in a water bath, and stirring the mixture for 10-15 minutes by a magnetic stirrer while heating the mixture in the water bath to prepare a bi-component surfactant;
(2) and preparing the microemulsion: adding the high distillation range isoparaffin, the modified silica microspheres and the dimethyl sulfate into the bi-component surfactant in parts by weight, stirring by a magnetic stirrer, heating to 50-55 ℃ while stirring, stirring until the system is uniform, and finally dropwise adding the deionized water in parts by weight into the bi-component surfactant for 1-1.5 minutes by a flow injection device to prepare a microemulsion;
(3) and acidification: adding the phosphoric acid and the citric acid monohydrate in parts by weight into the microemulsion, and heating to 56-60 ℃ while stirring to obtain an acidified emulsion;
(4) and adding a thickening agent: transferring the acidified emulsion into a stirring kettle, adding the Arabic gum and the potassium feldspar powder in parts by weight, stirring at a low speed of 400r/min for 2-3h at a speed of 200-;
(5) and filtering: naturally cooling the crude product to room temperature, and filtering by using a filter, wherein the filtering fineness of the filter is 400-500 meshes, and the filtrate is the finished product of the plate cleaning liquid.
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