Surface-active alcohol-free fountain functional water and preparation method thereof

Abstract

The invention relates to the technical field of lithographic printing, in particular to surface-active alcohol-free fountain functional water and a preparation method thereof. The surface-active alcohol-free fountain functional water is prepared from the following raw materials in parts by weight: 8-15 parts of glycerol, 8-12 parts of disodium hydrogen phosphate, 6-10 parts of citric acid, 4-6 parts of gum arabic, 3-6 parts of propylene glycol, 2-5 parts of ethylene glycol monobutyl ether, 0.8-1.5 parts of magnesium nitrate, 2-4 parts of a dispersing aid, 0.6-1.0 part of a metal protective agent, 0.5-1.0 part of an antibacterial agent, 1-2 parts of a compound aid, 1-3 parts of a defoaming agent, 2-3 parts of a wetting agent and 70-90 parts of deionized water. The prepared surface-active alcohol-free fountain functional water has excellent oxidation resistance and also has excellent antibacterial performance, so that the service life of the water is prolonged to a certain extent, and the quality of the water is guaranteed; moreover, the fountain solution can replace traditional alcohol fountain solutions, toxicity is reduced, safety and environmental friendliness are improved, meanwhile, the printing effect and quality are improved, and the printing cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of lithographic printing, in particular to a surface active alcohol-free dampening functional water and a preparation method thereof. Background Art

[0002] The image and non-image parts on the lithographic printing plate are almost on the same plane. During printing, in order to allow the ink to distinguish between the image and non-image parts of the printing plate, the water supply device of the printing plate component first supplies water to the non-image part of the printing plate, thereby protecting the non-image part of the printing plate from being soaked by the ink. Then, the ink supply device of the printing component supplies ink to the printing plate. Since the non-image part of the printing plate is protected by water, the ink can only be supplied to the image part of the printing plate. Finally, the ink on the printing plate is transferred to the rubber blanket, and then the pressure between the rubber cylinder and the impression cylinder is used to transfer the ink on the rubber blanket to the substrate to complete a printing. Therefore, lithographic printing is an indirect printing method.

[0003] In the process of flat printing, dampening water is needed. The dampening water usually contains ingredients such as wetting agents, pH regulators, and anti-corrosive agents to maintain the water-ink balance in the printing process, protect the printing plate and the printing press from damage, and improve the quality of the printed product. A green alcohol-free dampening solution is disclosed in the patent document with application number "CN201811653648.3", which is composed of cellulose, citric acid, sodium citrate, surfactant, glycerin, preservative, diethylene glycol, aqueous defoamer and pure water. Although the dampening solution provided by this patent document has the advantages of high printing durability and green environmental protection, its own antioxidant performance is insufficient and its antibacterial performance is relatively poor, which shortens its service life to a certain extent and also affects its quality. Therefore, the present invention provides a surface-active alcohol-free dampening functional water and a preparation method thereof to solve the above-mentioned technical problems. Summary of the invention

[0004] The object of the present invention is to provide a surface active alcohol-free fountain functional water and a preparation method thereof, wherein the prepared surface active alcohol-free fountain functional water not only has excellent antioxidant properties but also has excellent antibacterial properties, which prolongs its service life to a certain extent and also ensures its quality. Furthermore, the surface active alcohol-free fountain functional water prepared by the present invention can effectively replace the traditional alcohol fountain solution, reduce toxicity, improve safety and environmental protection, and at the same time improve the printing effect and quality and reduce the printing cost.

[0005] To achieve the above object, the present invention provides the following technical solutions: A surface active alcohol-free dampening functional water is composed of the following raw materials in parts by weight: 8-15 parts of propylene glycol, 8-12 parts of disodium hydrogen phosphate, 6-10 parts of citric acid, 4-6 parts of gum arabic, 3-6 parts of propylene glycol, 2-5 parts of ethylene glycol monobutyl ether, 0.8-1.5 parts of magnesium nitrate, 2-4 parts of dispersing aids, 0.6-1.0 parts of metal protective agents, 0.5-1.0 parts of antibacterial agents, 1-2 parts of compounding aids, 1-3 parts of defoaming agents, 2-3 parts of wetting agents and 70-90 parts of deionized water.

[0006] Furthermore, the preparation method of the dispersing aid comprises the following steps: Step 1, add 1,4-oxazacyclopentane into ethyl acetate at a dosage ratio of 2 to 4 mol / L, then add myristyl bromide in a molar amount of 0.3 to 0.5 times that of 1,4-oxazacyclopentane, mix and stir evenly, and then stir and react at a temperature of 60 to 65° C. for 12 to 15 hours; after the reaction is completed, first evaporate the ethyl acetate in the product components, and then purify the remaining product components, and store the purified product for future use.

[0007] Step 2: dissolve the purified product in chloroform at a dosage ratio of 0.15 to 0.2 g / mL, then add trimethylene dibromide in an amount 2.5 to 3.0 times the mass of the purified product, mix and stir evenly, and then keep the mixture at a temperature of 60 to 65° C. for 5 to 8 hours; after the reaction is completed, remove the chloroform by rotary evaporation, and obtain the dispersion aid after purification of the obtained reaction product.

[0008] Furthermore, the purification step in step 1 is: washing the remaining product component 2 to 3 times with deionized water and a methanol aqueous solution with a volume concentration of 40 to 60%, respectively, dissolving the remaining product component after washing in chloroform with a mass of 1 to 3 times, and adding anhydrous sodium sulfite with a mass of 0.1 to 0.15 times the mass of the remaining product component to remove the moisture therein, and then rotary evaporating at a temperature of 65 to 70° C. for 30 to 50 minutes.

[0009] Furthermore, the purification step in step 2 is as follows: the reaction product is first washed 2 to 3 times with ether of a mass 3 to 5 times that of the reaction product, and then acetone of an equal volume to the ether is added and nitrogen is introduced, and the reaction product is recrystallized at room temperature, and after removing the precipitate, the reaction product is rotary evaporated at a temperature of 60 to 65° C. for 40 to 60 minutes.

[0010] Furthermore, the metal protective agent is selected from any one of benzotriazole, benzoimidazole, triethanolamine and diethanolamine.

[0011] Furthermore, the antibacterial agent is selected from any one of dodecyltrimethylammonium chloride, dodecyldimethylbenzylammonium chloride and dodecyldimethylbenzylammonium bromide.

[0012] Furthermore, the compound auxiliary agent is compounded by cardanol polyoxyethylene ether and 0.6 to 0.8 times the mass of 2-thioimidazole amino acid.

[0013] Furthermore, the defoaming agent is any one of BYK-1610, BYK-025, HY-1040, and JY-821 defoaming agents.

[0014] Furthermore, the wetting agent is selected from any one of polyoxyethylene fatty alcohol ether, octylphenol polyoxyethylene ether, and coconut oil fatty alcohol monoethanolamide.

[0015] A preparation method of surface active alcohol-free fountain functional water comprises the following steps: accurately weighing various raw materials according to the formula amount and putting deionized water into a mixing device, adding the remaining raw materials after the water temperature rises to 40-55°C, and emulsifying them through heat preservation and stirring to obtain a finished surface active alcohol-free fountain functional water.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, 1,4-oxazahexacyclic is first put into ethyl acetate, and myristic bromide is added thereto, mixed and stirred evenly, and then the mixture is stirred and heated to react, so that 1,4-oxazahexacyclic and myristic bromide undergo a substitution reaction. After the reaction is completed, ethyl acetate is evaporated and the remaining product components are purified, the purified product is dissolved in chloroform, and trimethylene dibromide is added thereto, mixed and stirred evenly, and the purified product undergoes a substitution reaction with trimethylene dibromide, after the reaction is completed, chloroform is evaporated, and then purified to obtain a dispersing aid. The prepared dispersing aid can effectively reduce the surface tension of deionized water, so that each raw material can be uniformly and stably present in the fountain solution system. Furthermore, the dispersing aid prepared by the present invention also has excellent antibacterial properties, and the synergy between the dispersing aid and the antibacterial agent effectively ensures the antibacterial properties of the surface-active alcohol-free fountain solution. The cardanol polyoxyethylene ether and 2-thioimidazole amino acid in the compound auxiliary agent synergistically further improve the antioxidant properties of the surfactant alcohol-free fountain solution.

[0017] In summary, the surface active alcohol-free fountain functional water prepared by the present invention not only has excellent antioxidant properties but also has excellent antibacterial properties, which to a certain extent prolongs its service life and also ensures its quality. In addition, the surface active alcohol-free fountain functional water prepared by the present invention can effectively replace the traditional alcohol fountain solution, reduce toxicity, improve safety and environmental protection, and at the same time improve the printing effect and quality, and reduce printing costs. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0019] A surface active alcohol-free dampening functional water is composed of the following raw materials in parts by weight: 8 parts of propylene glycol, 8 parts of disodium hydrogen phosphate, 6 parts of citric acid, 4 parts of gum arabic, 3 parts of propylene glycol, 2 parts of ethylene glycol monobutyl ether, 0.8 parts of magnesium nitrate, 2 parts of dispersing aids, 0.6 parts of benzotriazole, 0.5 parts of dodecyltrimethylammonium chloride, 1 part of compounding aid, 1 part of BYK-1610 defoaming agent, 2 parts of polyoxyethylene fatty alcohol ether and 70 parts of deionized water; wherein the compounding aid is compounded by cardanol polyoxyethylene ether and 0.6 times the mass of 2-thioimidazole amino acid.

[0020] The preparation method of the dispersing aid comprises the following steps: Step 1. Add 1,4-oxazacyclopentane into ethyl acetate at a dosage ratio of 2 mol / L, then add myristyl bromide in a molar amount of 0.3 times that of 1,4-oxazacyclopentane, mix and stir evenly, and then stir and react at 60° C. for 12 hours; after the reaction is completed, first evaporate the ethyl acetate in the product components, and then purify the remaining product components, and store the purified product for future use.

[0021] The purification treatment steps are as follows: washing the remaining product component twice with deionized water and a methanol aqueous solution with a volume concentration of 40%, respectively, dissolving the remaining product component after washing in chloroform with an equal mass thereof, adding anhydrous sodium sulfite with a mass of 0.1 times that of the remaining product component to remove the moisture therein, and then rotary evaporating at a temperature of 65°C for 30 minutes.

[0022] Step 2: Dissolve the purified product in chloroform at a dosage ratio of 0.15 g / mL, then add trimethylene dibromide in an amount 2.5 times that of the purified product, mix and stir evenly, and then keep the mixture at 60°C for 5 hours; after the reaction is completed, remove the chloroform by rotary evaporation, and the obtained reaction product is purified to obtain a dispersing aid.

[0023] The purification process is as follows: the reaction product is first washed twice with ether three times its mass, then acetone equal in volume to the ether is added and nitrogen is introduced, recrystallized at room temperature, and after removing the precipitate, rotary evaporated at 60°C for 40 minutes.

[0024] The critical micelle concentration of the dispersing aid prepared in this example is 0.0038 g / L, which can reduce the surface tension of pure water to 23.16 mN / m.

[0025] A preparation method of a surfactant alcohol-free fountain functional water comprises the following steps: accurately weighing various raw materials according to the formula amount and putting deionized water into a mixing device, adding the remaining raw materials after the water temperature rises to 40°C, and emulsifying them through heat preservation and stirring to obtain a finished surfactant alcohol-free fountain functional water. Example 2

[0026] The preparation method of a surfactant alcohol-free fountain functional water provided in this embodiment is basically the same as that in Example 1, except that the specific composition of the surfactant alcohol-free fountain functional water and the preparation method of the dispersing aid are not exactly the same. The specific composition of the surfactant alcohol-free fountain functional water and the preparation method of the dispersing aid in this embodiment are as follows: A surface-active alcohol-free dampening functional water is composed of the following raw materials in parts by weight: 12 parts of propylene glycol, 10 parts of disodium hydrogen phosphate, 8 parts of citric acid, 5 parts of gum arabic, 4 parts of propylene glycol, 3 parts of ethylene glycol monobutyl ether, 1.2 parts of magnesium nitrate, 3 parts of dispersing aids, 0.8 parts of benzoimidazole, 0.7 parts of dodecyldimethylbenzyl ammonium chloride, 1.5 parts of compounding aids, 2 parts of BYK-025 defoaming agent, 2.5 parts of octylphenol polyoxyethylene ether and 80 parts of deionized water; wherein the compounding aid is compounded from cardanol polyoxyethylene ether and 0.7 times the mass of 2-thioimidazole amino acid.

[0027] The preparation method of the dispersing aid comprises the following steps: Step 1. Add 1,4-oxazacyclopentane into ethyl acetate at a dosage ratio of 3 mol / L, then add myristyl bromide in a molar amount of 0.4 times that of 1,4-oxazacyclopentane, mix and stir evenly, and then stir and react at a temperature of 60° C. for 14 hours; after the reaction is completed, first evaporate the ethyl acetate in the product components, and then purify the remaining product components, and store the purified product for future use.

[0028] Among them, the purification treatment steps are: washing the remaining product components three times with deionized water and a methanol aqueous solution with a volume concentration of 50%, respectively, dissolving the remaining product components after washing in chloroform with a mass twice that of the remaining product components, adding anhydrous sodium sulfite with a mass of 0.15 times that of the remaining product components to remove the moisture therein, and then rotary evaporating at a temperature of 65°C for 40 minutes.

[0029] Step 2: Dissolve the purified product in chloroform at a dosage ratio of 0.15 g / mL, then add trimethylene dibromide in an amount 2.5 times that of the purified product, mix and stir evenly, and then keep the mixture at 65°C for 6 hours; after the reaction is completed, remove the chloroform by rotary evaporation, and the obtained reaction product is purified to obtain a dispersing aid.

[0030] The purification process is as follows: the reaction product is first washed twice with ether of a volume four times that of the reaction product, and then an equal volume of acetone is added to the ether and nitrogen is introduced, and the reaction product is recrystallized at room temperature, and after removing the precipitate, the reaction product is rotary evaporated at 60°C for 50 minutes.

[0031] The critical micelle concentration of the dispersing aid prepared in this example is 0.0037 g / L, which can reduce the surface tension of pure water to 22.96 mN / m. Example 3

[0032] The preparation method of a surfactant alcohol-free fountain functional water provided in this embodiment is basically the same as that in Example 1, except that the specific composition of the surfactant alcohol-free fountain functional water and the preparation method of the dispersing aid are not exactly the same. The specific composition of the surfactant alcohol-free fountain functional water and the preparation method of the dispersing aid in this embodiment are as follows: A surface active alcohol-free dampening functional water is composed of the following raw materials in parts by weight: 15 parts of glycerol, 12 parts of disodium hydrogen phosphate, 10 parts of citric acid, 6 parts of gum arabic, 6 parts of propylene glycol, 5 parts of ethylene glycol monobutyl ether, 1.5 parts of magnesium nitrate, 4 parts of dispersing aids, 1.0 part of triethanolamine, 1.0 part of dodecyl dimethyl benzyl ammonium bromide, 2 parts of compounding aids, 3 parts of HY-1040 defoaming agent, 3 parts of coconut oil fatty alcohol monoethanolamide and 90 parts of deionized water; wherein the compounding aid is compounded by cardanol polyoxyethylene ether and 0.8 times the mass of 2-thioimidazole amino acid.

[0033] The preparation method of the dispersing aid comprises the following steps: Step 1. Add 1,4-oxazacyclopentane into ethyl acetate at a dosage ratio of 4 mol / L, then add myristyl bromide in a molar amount of 0.5 times that of 1,4-oxazacyclopentane, mix and stir evenly, and then stir and react at a temperature of 65° C. for 15 hours; after the reaction is completed, first evaporate the ethyl acetate in the product components, and then purify the remaining product components, and store the purified product for future use.

[0034] Among them, the purification treatment steps are: washing the remaining product components three times with deionized water and a methanol aqueous solution with a volume concentration of 60%, respectively, dissolving the remaining product components after washing in chloroform with a mass three times that of the remaining product components, adding anhydrous sodium sulfite with a mass of 0.15 times that of the remaining product components to remove the moisture therein, and then rotary evaporating at a temperature of 70°C for 50 minutes.

[0035] Step 2: Dissolve the purified product in chloroform at a dosage ratio of 0.2 g / mL, then add trimethylene dibromide in an amount 3.0 times that of the purified product, mix and stir evenly, and then keep the mixture at 65°C for 8 hours; after the reaction is completed, remove the chloroform by rotary evaporation, and the obtained reaction product is purified to obtain a dispersing aid.

[0036] The purification process is as follows: the reaction product is first washed three times with ether of a volume five times that of the reaction product, and then an equal volume of acetone is added to the ether and nitrogen is introduced, and the reaction product is recrystallized at room temperature, and after removing the precipitate, the reaction product is rotary evaporated at 65°C for 60 minutes.

[0037] The critical micelle concentration of the dispersing aid prepared in this example is 0.0037 g / L, which can reduce the surface tension of pure water to 23.08 mN / m.

[0038] Comparative Example 1: The main difference between this comparative example and Example 1 is that no dispersing aid is used in this comparative example.

[0039] Comparative Example 2: The main difference between this comparative example and Example 1 is that this comparative example uses cardanol polyoxyethylene ether to replace an equal amount of compounding auxiliary agents.

[0040] Comparative Example 3: The main difference between this comparative example and Example 1 is that this comparative example uses 2-thioimidazole amino acid to replace an equal amount of compounding auxiliary agent.

[0041] Performance Testing The relevant properties of the surface active alcohol-free fountain solution samples provided in Examples 1 to 3 and Comparative Examples 1 to 3 were tested respectively, and the obtained test data were recorded in the following table:

[0042] By comparing and analyzing the relevant data in the table, it can be seen that the surface-active alcohol-free fountain functional water prepared by the present invention not only has excellent antioxidant properties but also has excellent antibacterial properties, which prolongs its service life to a certain extent and also ensures its quality. Furthermore, the surface-active alcohol-free fountain functional water prepared by the present invention can effectively replace traditional alcohol fountain solution, reduce toxicity, improve safety and environmental protection, while improving printing effect and quality, and reducing printing costs. This shows that the surface-active alcohol-free fountain functional water provided by the present invention and its preparation method have a broader market prospect and are more suitable for promotion.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A surface active alcohol-free fountain functional water, characterized in that: The invention is composed of the following raw materials in parts by weight: 8 to 15 parts of propylene glycol, 8 to 12 parts of disodium hydrogen phosphate, 6 to 10 parts of citric acid, 4 to 6 parts of gum arabic, 3 to 6 parts of propylene glycol, 2 to 5 parts of ethylene glycol monobutyl ether, 0.8 to 1.5 parts of magnesium nitrate, 2 to 4 parts of dispersing aids, 0.6 to 1.0 parts of metal protective agents, 0.5 to 1.0 parts of antibacterial agents, 1 to 2 parts of compounding aids, 1 to 3 parts of defoaming agents, 2 to 3 parts of wetting agents and 70 to 90 parts of deionized water.

2. The surface active alcohol-free fountain functional water according to claim 1, characterized in that: The preparation method of the dispersing aid comprises the following steps: Step 1, adding 1,4-oxazacyclopentane into ethyl acetate at a dosage ratio of 2 to 4 mol / L, then adding myristyl bromide in a molar amount of 0.3 to 0.5 times that of 1,4-oxazacyclopentane, mixing and stirring evenly, and then reacting at a temperature of 60 to 65° C. with stirring for 12 to 15 hours; after the reaction is completed, firstly evaporating the ethyl acetate in the product components, and then purifying the remaining product components, and storing the purified product for future use; Step 2: dissolve the purified product in chloroform at a dosage ratio of 0.15 to 0.2 g / mL, then add trimethylene dibromide in an amount 2.5 to 3.0 times the mass of the purified product, mix and stir evenly, and then keep the mixture at a temperature of 60 to 65° C. for 5 to 8 hours; after the reaction is completed, remove the chloroform by rotary evaporation, and obtain the dispersion aid after purification of the obtained reaction product.

3. The surface active alcohol-free fountain functional water according to claim 2, characterized in that: The purification step in step 1 is: washing the remaining product components 2 to 3 times with deionized water and a methanol aqueous solution with a volume concentration of 40 to 60%, respectively, dissolving the remaining product components after washing in chloroform with a mass of 1 to 3 times, adding anhydrous sodium sulfite with a mass of 0.1 to 0.15 times that of the remaining product components to remove the moisture therein, and then rotary evaporating at a temperature of 65 to 70° C. for 30 to 50 minutes.

4. The surface active alcohol-free fountain functional water according to claim 2, characterized in that: The purification step in step 2 is as follows: the reaction product is first washed 2 to 3 times with ether of a mass 3 to 5 times that of the reaction product, then acetone of an equal volume to the ether is added and nitrogen is introduced, recrystallized at room temperature, and after removing the precipitate, rotary evaporation is performed at a temperature of 60 to 65° C. for 40 to 60 minutes.

5. The surface active alcohol-free fountain functional water according to claim 1, characterized in that: The metal protective agent is selected from any one of benzotriazole, benzoimidazole, triethanolamine and diethanolamine.

6. The surface active alcohol-free fountain functional water according to claim 1, characterized in that: The antibacterial agent is selected from any one of dodecyltrimethylammonium chloride, dodecyldimethylbenzylammonium chloride and dodecyldimethylbenzylammonium bromide.

7. The surface active alcohol-free fountain solution according to claim 1, characterized in that: The compound auxiliary agent is compounded by cardanol polyoxyethylene ether and 2-thioimidazole amino acid with a mass of 0.6 to 0.8 times that of cardanol polyoxyethylene ether.

8. The surface active alcohol-free fountain functional water according to claim 1, characterized in that: The defoamer is any one of BYK-1610, BYK-025, HY-1040 and JY-821.

9. The surface active alcohol-free fountain functional water according to claim 1, characterized in that: The wetting agent is selected from any one of polyoxyethylene fatty alcohol ether, octylphenol polyoxyethylene ether, and coconut oil fatty alcohol monoethanolamide.

10. A method for preparing a surface active alcohol-free fountain functional water according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: accurately weighing each raw material according to the formula amount and putting deionized water into a mixing device, adding the remaining raw materials after the water temperature rises to 40-55°C, and emulsifying the raw materials by heat preservation and stirring to obtain a surface active alcohol-free dampening functional water product.

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