Water-based ink acrylate emulsion for PVC (polyvinyl chloride) and preparation method of water-based ink acrylate emulsion

Abstract

The embodiment of the invention discloses a water-based ink acrylate emulsion for PVC (polyvinyl chloride) and a preparation method of the water-based ink acrylate emulsion. The water-based adhesive is prepared from the following raw materials in parts by weight: 4 to 5 parts of iso-tridecanol polyoxyethylene ether (40), 2 to 3 parts of disodium alcohol ether sulfosuccinate, 4 to 6 parts of glycidyl methacrylate, 3 to 5 parts of hydroxyethyl methylacrylate, 5 to 7 parts of methacrylic acid, 5 to 7 parts of acetone glyceryl acrylate, 30 to 40 parts of butyl acrylate and 50 to 60 parts of methyl acrylate. The invention discloses a water-based paint which is prepared from the following components in parts by weight: 20-25 parts of methyl methacrylate, 4-6 parts of 3-(2, 3-epoxypropoxy) propyl methyl diethoxy silane, 1.2-1.5 parts of potassium persulfate, 5-7 parts of disodium alcohol ether sulfosuccinate and 265-300 parts of deionized water. The water-based ink acrylate emulsion for PVC provided by the invention has the advantages of environmental protection, high transparency, good glossiness, light resistance, heat resistance, water resistance, no after-tack, strong adhesive force, high stability and the like, and has a better application prospect.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of acrylic ester emulsions, and in particular to a PVC water-based ink acrylic ester emulsion and a preparation method thereof. Background Art

[0002] Ink is a crucial material used in printing, creating designs and text on substrates through printing or inkjet printing. Ink consists of resins, pigments, fillers, additives, and solvents. It is used in a variety of printing applications, including books, periodicals, packaging, and architectural decoration. As demand for ink increases, the variety and production of inks are also expanding.

[0003] With the advancement of human civilization and the development of the printing industry, ink technology has become more sophisticated, and the variety of ink products has continued to expand. The concept of green environmental protection has also triggered a re-selection of ink raw materials and reforms in manufacturing processes, such as water-based inks and UV inks. Compared to traditional solvent-based inks, environmentally friendly water-based inks have become the main development direction of the ink industry.

[0004] Current inks for PVC substrates are generally solvent-based. Solvent-based inks offer excellent adhesion and water resistance, high transparency, and anti-sticking properties, but are environmentally unfriendly. The quality of water-based inks primarily depends on the quality of the resin. Currently, acrylic resin emulsions have been widely adopted for PVC substrates due to their gloss, weather resistance, and excellent rheological properties. However, inks formulated with acrylic resins still suffer from shortcomings such as low stability, poor transparency and heat resistance, poor anti-sticking properties, poor water resistance, and poor adhesion. There is a need to develop acrylic emulsions for PVC substrates that offer high transparency, gloss, light, heat, and water resistance, anti-sticking properties, high stability, and excellent adhesion. Summary of the Invention

[0005] To this end, an embodiment of the present invention provides a water-based ink acrylate emulsion for PVC and a preparation method thereof.

[0006] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] According to a first aspect of an embodiment of the present invention, the present invention provides a water-based ink acrylate emulsion for PVC, wherein the raw materials thereof include, by weight, 4-5 parts of isomeric tridecyl alcohol polyoxyethylene ether (40), 2-3 parts of disodium salt of alcohol ether sulfosuccinate, 4-6 parts of glycidyl methacrylate, 3-5 parts of hydroxyethyl methacrylate, 5-7 parts of methacrylic acid, 5-7 parts of acetone glycerol acrylate, 30-40 parts of butyl acrylate, 50-60 parts of methyl acrylate, 20-25 parts of methyl methacrylate, 4-6 parts of 3-(2,3-epoxypropoxy)propylmethyldiethoxysilane, 1.2-1.5 parts of potassium persulfate, 5-7 parts of disodium salt of alcohol ether sulfosuccinate, and 265-300 parts of deionized water.

[0008] According to a second aspect of an embodiment of the present invention, the present invention provides a method for preparing the above-mentioned PVC water-based ink acrylic ester emulsion, the method comprising the following steps:

[0009] (1) Mix 4-5 parts of isomeric tridecanol polyoxyethylene ether (40), 2-3 parts of disodium salt of alcohol ether sulfosuccinate, 4-6 parts of glycidyl methacrylate, 3-5 parts of hydroxyethyl methacrylate, 5-7 parts of methacrylic acid, 5-7 parts of acetone glycerol acrylate, 30-40 parts of butyl acrylate, 50-60 parts of methyl acrylate, 20-25 parts of methyl methacrylate, 4-6 parts of 3-(2,3-epoxypropoxy)propylmethyldiethoxysilane and 90-100 parts of deionized water, stir thoroughly and emulsify to obtain a pre-emulsion, and set aside;

[0010] (2) Mix 1.2-1.5 parts of potassium persulfate and 25-30 parts of deionized water to obtain a potassium persulfate aqueous solution for later use;

[0011] (3) Add 150-170 parts of deionized water, 5-7 parts of disodium salt of alcohol ether sulfosuccinate, and 12-15 parts of the pre-emulsion of step (1) into the reactor, raise the temperature to 78-80°C, and then add 5-7 parts of the potassium persulfate aqueous solution of step (2) to initiate the reaction; when the emulsion emits blue light and the temperature is 80-82°C, add the remaining pre-emulsion and the remaining potassium persulfate aqueous solution dropwise to carry out the reaction;

[0012] (4) After the reaction is completed, the temperature is lowered to 30-40°C, neutralized, and the pH value is adjusted to 7±1. The solid content of the emulsion is adjusted to 30±1% with deionized water to obtain the PVC water-based ink acrylic ester emulsion.

[0013] Furthermore, in step (1), the stirring conditions are: 800-1000 rpm, 30-50 minutes.

[0014] Furthermore, in step (3), the remaining pre-emulsion and the remaining potassium persulfate aqueous solution are added dropwise over 3-3.5 hours, and the temperature of the reaction system is controlled at 80-82°C during the addition process.

[0015] Furthermore, in step (3), after the dropwise addition is completed, the reaction system is kept at 80-82° C. for 2-2.5 hours.

[0016] Furthermore, in step (4), the mixture is neutralized with ammonia water having a concentration of 24-28%.

[0017] The embodiments of the present invention have the following advantages:

[0018] The ink for PVC of the present invention is a water-based environmentally friendly acrylic ester resin, and the emulsifier is alcohol ether sulfosuccinate disodium salt, which contains carboxylic acid groups and sulfonic acid groups in its molecule and has good hydrophilicity. It also contains long-chain alkyl etherified oxyethylene groups and has good hydrophobicity. Therefore, it has the dual surface chemical properties of nonionic emulsifier and anionic emulsifier, and is used together with nonionic emulsifier isotridecyl polyoxyethylene ether (40) to make the obtained polymer emulsion have good stability.

[0019] The emulsifier, disodium alcohol ether sulfosuccinate, is added to the reactor. The process and monomer ratio are adjusted to control the polymer particle size, resulting in a polymer emulsion with high transparency, resistance to dilution by alcohols, and good stability. Furthermore, the dried emulsion film is transparent, heat-resistant, light-resistant, and water-resistant.

[0020] The present invention uses the functional monomer glycidyl methacrylate, which contains a carbon-carbon double bond and an epoxy group within its molecule and can be polymerized via both functional group and ionic reactions. These two polymerization methods are utilized to enhance and improve the water resistance and adhesion of the resulting polymer film. Furthermore, the cross-linking reaction with the functional monomers methacrylic acid and hydroxyethyl methacrylate improves the density and adhesion of the resulting polymer film, further enhancing the heat resistance, light resistance, and water resistance of the resulting polymer.

[0021] The formula of the present invention uses 3-(2,3-epoxypropyloxy)propylmethyldiethoxysilane, a special low-molecular-weight organosilicon compound with strong reactivity with different matrix resins. Therefore, the resulting polymer has excellent temperature resistance and water resistance, and improves the product's adhesion to the substrate. By adjusting the ratio of the selected monomers butyl acrylate, methyl acrylate, and methyl methacrylate, and under the synergistic effect of 3-(2,3-epoxypropyloxy)propylmethyldiethoxysilane, the polymer film is non-sticky, highly transparent, and has good dryness.

[0022] The present invention uses glycerol acetone acetal acrylate, which has been proven through experiments to have extremely strong adhesion to the substrate PVC. When used together with 3-(2,3-epoxypropoxy)propylmethyldiethoxysilane, its reactivity to the substrate PVC is further enhanced.

[0023] The present invention uses a thermal decomposition initiator, potassium persulfate, to carry out the emulsion polymerization reaction. The initiation temperature is 78-80°C, and the reaction temperature is controlled at 80-82°C. The monomers and additives selected are combined to ensure that the particle size and particle size distribution, molecular weight and molecular weight distribution of the resulting polymer meet the requirements of the present invention. The monomers and additives selected in the present invention are all environmentally friendly, and the resulting aqueous polymer emulsion is also environmentally friendly.

[0024] Therefore, the PVC water-based ink acrylic emulsion of the present invention has the advantages of environmental protection, high transparency, good gloss, light resistance, heat resistance, water resistance, no back sticking, good adhesion and high stability. DETAILED DESCRIPTION

[0025] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0026] Example 1

[0027] This embodiment provides a water-based ink acrylic emulsion for PVC, and the preparation method thereof comprises the following steps:

[0028] (1) Mix 4 parts of isomeric tridecanol polyoxyethylene ether (40), 2 parts of disodium salt of alcohol ether sulfosuccinate, 4 parts of glycidyl methacrylate, 3 parts of hydroxyethyl methacrylate, 5 parts of methacrylic acid, 5 parts of acetone glycerol acrylate, 30 parts of butyl acrylate, 50 parts of methyl acrylate, 20 parts of methyl methacrylate, 4 parts of 3-(2,3-epoxypropoxy)propylmethyldiethoxysilane and 90 parts of deionized water, and stir and emulsify at 1000 rpm for 30 minutes to obtain a pre-emulsion for use.

[0029] (2) Mix 1.2 parts of potassium persulfate and 25 parts of deionized water to obtain a potassium persulfate aqueous solution for later use.

[0030] (3) Add 150 parts of deionized water, 5 parts of disodium salt of alcohol ether sulfosuccinate, and 12 parts of pre-emulsion into the reactor, raise the temperature to 78-80°C, and then add 5 parts of potassium persulfate aqueous solution to initiate the reaction; when the emulsion emits blue light and the temperature is 80-82°C, add the remaining pre-emulsion and the remaining potassium persulfate aqueous solution dropwise, and complete the addition in 3-3.5 hours. During the reaction, the temperature is controlled at 80-82°C, and the temperature is kept for 2 hours after the addition is completed.

[0031] (4) After the heat preservation is completed, the temperature is lowered to 30-40°C, neutralized with 26% ammonia water, and the pH value is adjusted to 7±1. The solid content of the emulsion is adjusted to 30±1% with deionized water to obtain product A.

[0032] Example 2

[0033] This embodiment provides a water-based ink acrylic emulsion for PVC, and the preparation method thereof comprises the following steps:

[0034] (1) Mix 4.2 parts of isomeric tridecanol polyoxyethylene ether (40), 2.2 parts of disodium salt of alcohol ether sulfosuccinate, 4.4 parts of glycidyl methacrylate, 3.4 parts of hydroxyethyl methacrylate, 5.4 parts of methacrylic acid, 5.4 parts of acetone glycerol acrylate, 32 parts of butyl acrylate, 52 parts of methyl acrylate, 21 parts of methyl methacrylate, 4.4 parts of 3-(2,3-epoxypropoxy)propylmethyldiethoxysilane and 92 parts of deionized water, stir and emulsify at 1000 rpm for 30 minutes to obtain a pre-emulsion for use.

[0035] (2) Mix 1.26 parts of potassium persulfate and 26 parts of deionized water to obtain a potassium persulfate aqueous solution for later use.

[0036] (3) Add 154 parts of deionized water, 5.4 parts of disodium salt of alcohol ether sulfosuccinate, and 12.6 parts of pre-emulsion into the reactor, raise the temperature to 78-80°C, and then add 5.4 parts of potassium persulfate aqueous solution to initiate the reaction; when the emulsion emits a blue light and the temperature is 80-82°C, add the remaining pre-emulsion and the remaining potassium persulfate aqueous solution dropwise, and complete the addition in 3-3.5 hours. During the reaction, the temperature is controlled at 80-82°C, and the temperature is kept for 2 hours after the addition is completed;

[0037] (4) After the heat preservation is completed, the temperature is lowered to 30-40°C, neutralized with 26% ammonia water, and the pH value is adjusted to 7±1. The solid content of the emulsion is adjusted to 30±1% with deionized water to obtain product B.

[0038] Example 3

[0039] This embodiment provides a water-based ink acrylic emulsion for PVC, and the preparation method thereof comprises the following steps:

[0040] (1) Mix 4.4 parts of isomeric tridecanol polyoxyethylene ether (40), 2.4 parts of disodium salt of alcohol ether sulfosuccinate, 4.8 parts of glycidyl methacrylate, 3.8 parts of hydroxyethyl methacrylate, 5.8 parts of methacrylic acid, 5.8 parts of acetone glycerol acrylate, 34 parts of butyl acrylate, 54 parts of methyl acrylate, 22 parts of methyl methacrylate, 4.8 parts of 3-(2,3-epoxypropoxy)propylmethyldiethoxysilane and 94 parts of deionized water, stir and emulsify at 1000 rpm for 30 minutes to obtain a pre-emulsion for use.

[0041] (2) Mix 1.32 parts of potassium persulfate and 27 parts of deionized water to obtain a potassium persulfate aqueous solution for later use.

[0042] (3) Add 158 parts of deionized water, 5.8 parts of disodium salt of alcohol ether sulfosuccinate, and 13.2 parts of pre-emulsion into the reactor, raise the temperature to 78-80°C, and then add 5.8 parts of potassium persulfate aqueous solution to initiate the reaction; when the emulsion emits a blue light and the temperature is 80-82°C, add the remaining pre-emulsion and the remaining potassium persulfate aqueous solution dropwise, and complete the addition in 3-3.5 hours. During the reaction, the temperature is controlled at 80-82°C, and the temperature is kept for 2 hours after the addition is completed;

[0043] (4) After the heat preservation is completed, the temperature is lowered to 30-40°C, neutralized with 26% ammonia water, and the pH value is adjusted to 7±1. The solid content of the emulsion is adjusted to 30±1% with deionized water to obtain product C.

[0044] Example 4

[0045] This embodiment provides a water-based ink acrylic emulsion for PVC, and the preparation method thereof comprises the following steps:

[0046] (1) Mix 4.6 parts of isomeric tridecanol polyoxyethylene ether (40), 2.6 parts of disodium salt of alcohol ether sulfosuccinate, 5.2 parts of glycidyl methacrylate, 4.2 parts of hydroxyethyl methacrylate, 6.2 parts of methacrylic acid, 6.2 parts of acetone glycerol acrylate, 36 parts of butyl acrylate, 56 parts of methyl acrylate, 23 parts of methyl methacrylate, 5.2 parts of 3-(2,3-epoxypropoxy)propylmethyldiethoxysilane and 96 parts of deionized water, stir and emulsify at 1000 rpm for 30 minutes to obtain a pre-emulsion for use.

[0047] (2) Mix 1.38 parts of potassium persulfate and 28 parts of deionized water to obtain a potassium persulfate aqueous solution for later use.

[0048] (3) Add 162 parts of deionized water, 6.2 parts of disodium salt of alcohol ether sulfosuccinate, and 13.8 parts of pre-emulsion into the reactor, raise the temperature to 78-80°C, and then add 6.2 parts of potassium persulfate aqueous solution to initiate the reaction; when the emulsion emits a blue light and the temperature is 80-82°C, add the remaining pre-emulsion and the remaining potassium persulfate aqueous solution dropwise, and complete the addition in 3-3.5 hours. During the reaction, the temperature is controlled at 80-82°C, and the temperature is kept for 2 hours after the addition is completed;

[0049] (4) After the insulation is completed, the temperature is lowered to 30-40°C, neutralized with 26% ammonia water, and the pH value is adjusted to 7±1. The solid content of the emulsion is adjusted to 30±1% with deionized water to obtain product D.

[0050] Example 5

[0051] This embodiment provides a water-based ink acrylic emulsion for PVC, and the preparation method thereof comprises the following steps:

[0052] (1) Mix 4.8 parts of isomeric tridecanol polyoxyethylene ether (40), 2.8 parts of disodium salt of alcohol ether sulfosuccinate, 5.6 parts of glycidyl methacrylate, 4.6 parts of hydroxyethyl methacrylate, 6.6 parts of methacrylic acid, 6.6 parts of acetone glycerol acrylate, 38 parts of butyl acrylate, 58 parts of methyl acrylate, 24 parts of methyl methacrylate, 5.6 parts of 3-(2,3-epoxypropoxy)propylmethyldiethoxysilane and 98 parts of deionized water, stir and emulsify at 1000 rpm for 30 minutes to obtain a pre-emulsion for use.

[0053] (2) Mix 1.44 parts of potassium persulfate and 29 parts of deionized water to obtain a potassium persulfate aqueous solution for later use.

[0054] (3) Add 166 parts of deionized water, 6.6 parts of disodium salt of alcohol ether sulfosuccinate, and 14.4 parts of pre-emulsion into the reactor, raise the temperature to 78-80°C, and then add 6.6 parts of potassium persulfate aqueous solution to initiate the reaction; when the emulsion emits a blue light and the temperature is 80-82°C, add the remaining pre-emulsion and the remaining potassium persulfate aqueous solution dropwise, and complete the addition in 3-3.5 hours. During the reaction, the temperature is controlled at 80-82°C, and the temperature is kept for 2 hours after the addition is completed;

[0055] (4) After the insulation is completed, the temperature is lowered to 30-40°C, neutralized with 26% ammonia water, and the pH value is adjusted to 7±1. The solid content of the emulsion is adjusted to 30±1% with deionized water to obtain product E.

[0056] Example 6

[0057] This embodiment provides a water-based ink acrylic emulsion for PVC, and the preparation method thereof comprises the following steps:

[0058] (1) Mix 5 parts of isomeric tridecanol polyoxyethylene ether (40), 3 parts of disodium salt of alcohol ether sulfosuccinate, 6 parts of glycidyl methacrylate, 5 parts of hydroxyethyl methacrylate, 7 parts of methacrylic acid, 7 parts of acetone glycerol acrylate, 40 parts of butyl acrylate, 60 parts of methyl acrylate, 25 parts of methyl methacrylate, 6 parts of 3-(2,3-epoxypropoxy)propylmethyldiethoxysilane and 100 parts of deionized water, stir and emulsify at 1000 rpm for 30 minutes to obtain a pre-emulsion for use.

[0059] (2) Mix 1.5 parts of potassium persulfate and 30 parts of deionized water to obtain a potassium persulfate aqueous solution for later use.

[0060] (3) Add 170 parts of deionized water, 7 parts of disodium salt of alcohol ether sulfosuccinate, and 15 parts of pre-emulsion into the reactor, raise the temperature to 78-80°C, and then add 7 parts of potassium persulfate aqueous solution to initiate the reaction; when the emulsion shows blue light and the temperature is 80-82°C, add the remaining pre-emulsion and the remaining potassium persulfate aqueous solution dropwise, and complete the addition in 3-3.5 hours. During the reaction, the temperature is controlled at 80-82°C, and the temperature is kept for 2 hours after the addition is completed;

[0061] (4) After the heat preservation is completed, the temperature is lowered to 30-40°C, neutralized with 26% ammonia water, and the pH value is adjusted to 7±1. The solid content of the emulsion is adjusted to 30±1% with deionized water to obtain product F.

[0062] Test Case

[0063] Take 100g of each of products A, B, C, D, E, F, and commercially available 11K16, add 0.5g of the film-forming aid alcohol ester twelve, 0.2g of the wetting agent Silok 8000, and 0.3g of the defoamer Silok 4635, stir evenly, then add an appropriate amount of thickener HB-139. After thickening, add 4g of the color paste BASF Dispers 6900, stir evenly, and filter through a 120-mesh filter cloth. Use a glass rod to roll on PVC and dry at 80-100°C.

[0064] Emulsion appearance: Use visual inspection to observe whether the emulsion has gel, whether it is transparent and its color.

[0065] Particle size test: The test was performed using a Nano-ZS nanoparticle size analyzer.

[0066] Mechanical stability test: The test is carried out using a centrifuge at 3000 r / min for 20 minutes at room temperature. If there is no precipitation, it means that the storage period exceeds 180 days.

[0067] Ink gloss test: measured in accordance with GB / T13217.2-91.

[0068] Adhesion test: The formulated ink was applied to PVC using a 100μm applicator. After drying at 80-100°C, a cross-cut test was performed according to the national standard GB / T9286-98. Adhesion is graded from 0 to 5, with 0 being the best and 5 being the worst.

[0069] Water resistance: After the prepared ink is dried to form a film on PVC, soak it in deionized water at 25°C for 24 hours and observe whether the latex film is bubbling, transparent or white.

[0070] Ink fineness test: Determined in accordance with GB / T13217.3-91.

[0071] Light and weather resistance: tested in accordance with GB / T 31899-2015 "Textile Weatherability Test - UV Exposure Test Standard".

[0072] Heat resistance: According to the national standard GB / T.13767-1992 textile heat resistance test.

[0073] Dilution stability against alcohol: Take 50g of the emulsion and add an equal amount of ethanol, place it at room temperature for 180 days, and observe the stability.

[0074] The test results are shown in Table 1 below.

[0075] Table 1

[0076]

[0077] The test results show that the product of the present invention has obvious advantages over similar products on the market in terms of transparency, glossiness, light resistance, heat resistance, water resistance, anti-sticking, adhesion, stability and other performance indicators.

[0078] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A water-based ink acrylic emulsion for PVC, characterized in that: The raw materials include, by weight: 4-5 parts of isomeric tridecanol polyoxyethylene ether (40), 2-3 parts of disodium salt of alcohol ether sulfosuccinate, 4-6 parts of glycidyl methacrylate, 3-5 parts of hydroxyethyl methacrylate, 5-7 parts of methacrylic acid, 5-7 parts of acetone glycerol acrylate, 30-40 parts of butyl acrylate, 50-60 parts of methyl acrylate, 20-25 parts of methyl methacrylate, 4-6 parts of 3-(2,3-epoxypropoxy)propylmethyldiethoxysilane, 1.2-1.5 parts of potassium persulfate, 5-7 parts of disodium salt of alcohol ether sulfosuccinate, and 265-300 parts of deionized water.

2. The method for preparing the PVC water-based ink acrylic emulsion according to claim 1, characterized in that: The method comprises the following steps: (1) Mix 4-5 parts of isomeric tridecanol polyoxyethylene ether (40), 2-3 parts of disodium salt of alcohol ether sulfosuccinate, 4-6 parts of glycidyl methacrylate, 3-5 parts of hydroxyethyl methacrylate, 5-7 parts of methacrylic acid, 5-7 parts of acetone glycerol acrylate, 30-40 parts of butyl acrylate, 50-60 parts of methyl acrylate, 20-25 parts of methyl methacrylate, 4-6 parts of 3-(2,3-epoxypropoxy)propylmethyldiethoxysilane and 90-100 parts of deionized water, stir thoroughly and emulsify to obtain a pre-emulsion, and set aside; (2) Mix 1.2-1.5 parts of potassium persulfate and 25-30 parts of deionized water to obtain a potassium persulfate aqueous solution for later use; (3) Add 150-170 parts of deionized water, 5-7 parts of disodium salt of alcohol ether sulfosuccinate, and 12-15 parts of the pre-emulsion of step (1) into the reactor, raise the temperature to 78-80°C, and then add 5-7 parts of the potassium persulfate aqueous solution of step (2) to initiate the reaction; when the emulsion emits blue light and the temperature is 80-82°C, add the remaining pre-emulsion and the remaining potassium persulfate aqueous solution dropwise to carry out the reaction; (4) After the reaction is completed, the temperature is lowered to 30-40°C, neutralized, and the pH value is adjusted to 7±1. The solid content of the emulsion is adjusted to 30±1% with deionized water to obtain the PVC water-based ink acrylic ester emulsion.

3. The method for preparing the PVC water-based ink acrylic emulsion according to claim 2, wherein: In step (1), the stirring conditions are: 800-1000 rpm, 30-50 minutes.

4. The method for preparing the PVC water-based ink acrylic emulsion according to claim 2, wherein: In step (3), the remaining pre-emulsion and the remaining potassium persulfate aqueous solution are added dropwise over 3-3.5 hours, and the temperature of the reaction system is controlled at 80-82°C during the addition process.

5. The method for preparing the PVC water-based ink acrylic emulsion according to claim 2, wherein: In step (3), after the dropwise addition is completed, the reaction system is kept at 80-82°C for 2-2.5 hours.

6. The method for preparing the PVC water-based ink acrylic emulsion according to claim 2, wherein: In step (4), neutralize with ammonia water with a concentration of 24-28%.

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