An alcohol-resistant marker ink and a method for preparing the same

Abstract

The application provides an alcohol-resistant marker ink and a preparation method thereof, and belongs to the technical field of ink preparation. The alcohol-resistant marker ink comprises chlorovinyl resin, aldehyde ketone resin, acrylic resin, ketone solvent, alcohol ether solvent, ester solvent, adhesion promoter, alcohol-resistant additive, leveling agent, liquid paraffin and color paste. The marker ink has strong alcohol-resistant wiping performance on commonly used writing materials in a laboratory, far exceeding ordinary marker ink and commercially available alcohol-resistant marker ink. Meanwhile, the marker ink has strong stability, fast drying speed of written characters, long liquid discharge time, and is not prone to drying and clogging of the pen head under long-term storage conditions. The raw materials and preparation process of the application are simple, and the production cost is low. The excellent alcohol-resistant performance reduces the need for repeated marking, improves work efficiency, and reduces the possibility of repeated marking errors. The application has a wide application prospect in special environments such as medical treatment and laboratories.

Description

Technical Field

[0001] This invention relates to the technical field of ink preparation, specifically to an alcohol-resistant marker ink and its preparation method. Background Technology

[0002] Markers are core writing and labeling tools widely used in industrial, laboratory, and medical fields. The overall performance of the ink directly determines the stability of the writing, its reliability, and its adaptability to different scenarios. In special application scenarios such as medical testing, biological laboratories, and precision industrial processing, the writing needs to be frequently exposed to disinfectants such as 75% medical alcohol and anhydrous ethanol, as well as organic solvents. This places high demands on the alcohol resistance and smudge resistance of marker ink.

[0003] Currently, mainstream marker inks on the market are mainly divided into two systems: water-based inks and oil-based inks. Both types of inks have inherent technical defects, making them difficult to adapt to the needs of high-end and special usage scenarios. Water-based inks use pure water as the main solvent and are prepared by compounding dyes, pigments, synthetic resins, and functional additives. The overall formula is environmentally friendly, but its core weakness is its poor resistance to organic solvents. After contact with alcohol, the writing is prone to blurring and fading. Traditional oil-based inks, although improving basic solvent resistance to some extent, generally suffer from insufficient resistance to alcohol wiping and easy smudging and diffusion of the writing. Moreover, their formulas often contain harmful solvents such as benzene, resulting in poor environmental protection and safety in use.

[0004] To overcome the poor alcohol resistance of inks, existing technologies typically employ three methods for improvement: first, introducing cross-linking agents to promote the rapid formation of a dense and stable ink film; second, selecting special pigments and dyes with high solvent resistance to enhance alcohol resistance at the substrate level. However, these improvement technologies all have significant limitations, failing to simultaneously achieve both alcohol resistance and writing performance. Specifically, the addition of cross-linking agents disrupts the component balance of the ink system, reducing long-term storage stability and shortening product lifespan; while solvent-resistant pigments and dyes are expensive to procure, significantly increasing production costs and hindering large-scale mass production applications.

[0005] Chinese invention patent CN118562334A discloses a medical marker ink. The formulation system mainly includes cationic modified halloysite nanotubes, phycoerythrin / phycocyanin natural pigments, medical acrylic resin, surfactants, humectants, ethanol, and deionized water. Its core principle is to use electrostatic interaction to load negatively charged natural pigments onto the inside and outside of positively charged halloysite nanotubes, thereby improving the pigment fixation effect. However, this technical solution has the following shortcomings: (1) The preparation process of cationic modified halloysite nanotubes is complicated, the production threshold is high, and the raw material cost is high, which cannot meet the needs of large-scale industrial production; (2) The natural pigments used in the formulation are dye materials, which have extremely poor water resistance and solvent resistance, and cannot resist alcohol wiping. The writing is easy to bleed and fade. At the same time, the coloring strength, light stability, and temperature stability of natural pigments are far lower than those of synthetic pigments, and the overall performance of the product is poor.

[0006] Chinese invention patent CN112795234A discloses an alcohol-resistant water-based ink. This ink is composed of water-based acrylic resin, polyether-modified organosilicon, MQ silicone resin, pigments, and dispersants. Although it has certain alcohol resistance properties, this ink is specifically developed for the printing industry. The formulation system has a high viscosity and its fluidity is not suitable for the operating conditions of printing equipment. It has extremely poor compatibility with the capillary ink supply system of marker pens. When applied to marker pens, it is prone to problems such as poor ink flow, pen tip clogging, and poor writing continuity, and cannot meet the requirements for long-term stable writing of marker pens.

[0007] In summary, existing marker ink technologies generally suffer from multiple core technological bottlenecks, severely restricting their widespread application in high-end scenarios: First, their alcohol resistance is insufficient. When existing inks come into contact with common organic solvents such as 75% medical alcohol and anhydrous ethanol, the writing easily smudges, becomes blurred, and rubs off. Even slight wiping can damage the markings, failing to meet the marking retention requirements of special scenarios such as medical and laboratory settings. Second, their environmental safety is insufficient. Traditional oil-based marker inks often contain benzene-based organic solvents such as xylene. Although this can improve resin solubility and enhance basic solvent resistance, these substances pose a carcinogenic risk, and long-term exposure can harm the health of operators, failing to meet the requirements for green and safe production and use.

[0008] Therefore, it is of great significance to develop a marker ink that combines excellent alcohol resistance and environmental safety to meet the needs of high-end applications such as medical, laboratory, and precision industries. Summary of the Invention

[0009] To overcome the aforementioned defects and shortcomings in the prior art, the present invention provides an alcohol-resistant marker ink and its preparation method.

[0010] The first objective of this invention is to provide an alcohol-resistant marker ink.

[0011] A second objective of this invention is to provide the application of the above-described marker ink in the manufacture of marker pens.

[0012] A third objective of this invention is to provide a method for preparing the marker ink described above.

[0013] This invention claims protection for the following: An alcohol-resistant marker ink comprises the following components in parts by weight: 1-3 parts chloroacetic acid resin, 0.5-1.5 parts aldehyde-ketone resin, 1-2 parts acrylic resin, 5-10 parts ketone solvent, 25-45 parts alcohol ether solvent, 22-27 parts ester solvent, 8-15 parts adhesion promoter, 1-3 parts alcohol-resistant additive, 1-2 parts leveling agent, 0.5-1 part liquid paraffin, and 10-20 parts colorant.

[0014] Among them, vinyl chloride-vinyl acetate copolymer enhances alcohol resistance, aldehyde-ketone resin increases ink film hardness, and acrylic resin provides basic strength and adhesion of the ink film.

[0015] Preferably, the ketone solvent includes acetone or butanone.

[0016] Preferably, the alcohol ether solvent includes propylene glycol methyl ether acetate and ethylene glycol ethyl ether.

[0017] Preferably, the ester solvent comprises any combination of the following: Ethyl glycol diacetate and ethyl acetate; Ethylene glycol diacetate and butyl acetate.

[0018] This invention employs a ternary mixed solvent system comprising ketone solvents, alcohol ether solvents, and ester solvents, with ketone and ester solvents serving as the main solvents and alcohol ether solvents as co-solvents. This solvent system effectively dissolves resin and pigments while maintaining a suitable evaporation rate, ensuring that the ink dries at a moderate speed—neither too quickly to clog the pen tip nor too slowly to negatively impact the writing experience.

[0019] The marker ink of this invention is an oil-based ink.

[0020] Preferably, the marker ink comprises the following components in parts by weight: 1.58-2.24 parts of chloroacetic acid resin, 0.75-1.4 parts of aldehyde-ketone resin, 1.49-1.5 parts of acrylic resin, 5-10 parts of ketone solvent, 25-45 parts of alcohol-ether solvent, 22-27 parts of ester solvent, 8-15 parts of adhesion promoter, 1-3 parts of alcohol-resistant additive, 1-2 parts of leveling agent, 0.5-1 part of liquid paraffin, and 10-20 parts of color paste.

[0021] More preferably, the marker ink comprises the following components in parts by weight: 1.58-2.24 parts of chloroacetic acid resin, 0.75-1.4 parts of aldehyde-ketone resin, 1.49-1.5 parts of acrylic resin, 7.07 parts of ketone solvent, 34.95 parts of alcohol-ether solvent, 24.63 parts of ester solvent, 10.14 parts of adhesion promoter, 2.09 parts of alcohol-resistant additive, 1.19 parts of leveling agent, 0.54 parts of liquid paraffin, and 14.91 parts of color paste.

[0022] More preferably, the marker ink comprises the following components in parts by weight: 1.58-2.24 parts of chloroacetic acid resin, 0.75-1.4 parts of aldehyde-ketone resin, 1.49-1.5 parts of acrylic resin, 7.07 parts of acetone, 23.86 parts of propylene glycol methyl ether acetate, 11.09 parts of ethylene glycol ethyl ether, 16.40 parts of ethyl acetate, 8.23 ​​parts of ethylene glycol diacetate, 10.14 parts of adhesion promoter, 2.09 parts of alcohol-resistant additive, 1.19 parts of leveling agent, 0.54 parts of liquid paraffin, and 14.91 parts of colorant; Alternatively, the following components may be used: 1.58–2.24 parts of chloroacetic acid resin, 0.75–1.4 parts of aldehyde-ketone resin, 1.49–1.5 parts of acrylic resin, 7.07 parts of acetone, 23.86 parts of propylene glycol methyl ether acetate, 11.09 parts of ethylene glycol ethyl ether, 16.40 parts of butyl acetate, 8.23 ​​parts of ethylene glycol diacetate, 10.14 parts of adhesion promoter, 2.09 parts of alcohol-resistant additive, 1.19 parts of leveling agent, 0.54 parts of liquid paraffin, and 14.91 parts of color paste; Alternatively, the following components may be used: 1.58–2.24 parts of chloroacetic acid resin, 0.75–1.4 parts of aldehyde-ketone resin, 1.49–1.5 parts of acrylic resin, 7.07 parts of butanone, 23.86 parts of propylene glycol methyl ether acetate, 11.09 parts of ethylene glycol ethyl ether, 16.40 parts of ethyl acetate, 8.23 ​​parts of ethylene glycol diacetate, 10.14 parts of adhesion promoter, 2.09 parts of alcohol-resistant additive, 1.19 parts of leveling agent, 0.54 parts of liquid paraffin, and 14.91 parts of color paste.

[0023] As one feasible approach, the adhesion promoter is a chlorinated polyolefin adhesion promoter, the alcohol-resistant additive is a modified polymer resin, the leveling agent is polydimethylpolysiloxane, and the color paste is acrylic carbon black paste.

[0024] The alcohol resistance mechanism of the marker ink of this invention is mainly based on the dual effects of physical anchoring and chemical barrier: (1) Physical anchoring effect: After the solvent evaporates, the chloroacetic acid resin and acrylic resin form a dense three-dimensional network film, which firmly wraps and fixes the pigment particles to the surface of the writing material. Even if alcohol comes into contact with the resin, it can only swell the surface layer of the resin, without completely destroying the film structure; (2) Chemical barrier effect: The non-polar vinyl acetate monomer in vinyl chloride resin is embedded in the polar vinyl chloride molecular chain, which reduces the overall polarity of the resin and makes it less compatible with the polar solvent ethanol, thus giving it excellent alcohol resistance. At the same time, the vinyl acetate segments can also provide appropriate flexibility and adhesion; (3) Physical barrier effect: The added liquid paraffin forms a hydrophobic and alcohol-repellent protective layer on the surface of the ink film, which plays a physical barrier role and further prevents the penetration and erosion of alcohol. (4) Synergistic enhancement effect: The components in the composite resin system work together to form a denser and more stable ink film structure. When the film-forming material contains an appropriate amount of chloroacetic acid resin, the non-polar segments in its molecules can effectively resist the erosion of polar solvents such as alcohol, while the polar segments provide good adhesion to the substrate.

[0025] The above-mentioned marker ink is used in the manufacture of marker pens.

[0026] Preferably, the marker ink improves the marker's alcohol resistance and / or the speed at which the ink dries.

[0027] The improvement of the alcohol resistance and / or the speed of ink drying of the marker refers to improving the alcohol resistance and / or the speed of ink drying of the marks left by the marker on the writing material during the writing process.

[0028] The above-mentioned method for preparing marker ink includes the following steps: S1. Add chloroacetic acid resin, aldehyde-ketone resin and acrylic resin to a mixed solvent of ketone solvent and ester solvent, heat and stir until transparent to obtain a mixture; S2. Under stirring conditions, add alcohol ether solvent, adhesion promoter, alcohol resistance agent, liquid paraffin and leveling agent to the mixture obtained in step S1, mix thoroughly, add color paste, stir evenly to obtain ink; S3. The ink obtained in step S2 is aged and impurities are removed to obtain the final product.

[0029] The present invention adopts a staged addition preparation method, first completely dissolving the resin, then adding the additives, and finally adding the color paste to ensure that the components are fully dispersed and compatible.

[0030] Preferably, in step S1, the heating temperature is 55-65°C.

[0031] More preferably, in step S1, the heating temperature is 60°C.

[0032] Preferably, in step S1, the stirring speed is 300-400 rpm.

[0033] More preferably, in step S1, the stirring speed is 300 rpm.

[0034] Preferably, in step S2, the stirring speed is 500-800 rpm.

[0035] More preferably, in step S2, alcohol ether solvent, adhesion promoter, alcohol-resistant additive, liquid paraffin and leveling agent are added to the mixture obtained in step S1 under stirring at 800 rpm. After thorough mixing, color paste is added, and the mixture is stirred evenly at 500 rpm to obtain ink.

[0036] Preferably, in step S2, the stirring time is 55 to 65 minutes.

[0037] More preferably, in step S2, the stirring time is 60 min.

[0038] Preferably, in step S3, the ripening conditions are ripening at 25-30°C for 22-26 hours.

[0039] More preferably, in step S3, the ripening conditions are ripening at 25°C for 24 hours.

[0040] Compared with the prior art, the present invention has the following beneficial effects: This invention provides an alcohol-resistant marker ink and its preparation method. The marker ink of this invention exhibits superior alcohol resistance on commonly used laboratory writing materials, far exceeding that of ordinary marker inks and commercially available alcohol-resistant marker inks. Furthermore, this marker ink demonstrates strong stability, rapid drying of the ink, long ink dispensing time, and resistance to clogging of the pen tip under long-term storage conditions. The raw materials and preparation process of this invention are simple, resulting in low production costs. Its excellent alcohol resistance reduces the need for repeated marking, improves work efficiency, and reduces the possibility of errors in repeated marking, making it promising for wide application in special environments such as medical and laboratory settings. Attached Figure Description

[0041] Figure 1 The number of times the writing in each group of marker inks is completely erased. Detailed Implementation

[0042] The present invention will be further illustrated below with reference to specific embodiments, but the embodiments do not limit the present invention in any way. Unless otherwise specified, the reagents, methods, and equipment used in the present invention are conventional reagents, methods, and equipment in this technical field.

[0043] Unless otherwise specified, all reagents and materials used in the following examples are commercially available.

[0044] The adhesion promoter used in the examples and comparative examples is a chlorinated polyolefin adhesion promoter, the alcohol-resistant additive is a modified polymer resin, the leveling agent is polydimethylpolysiloxane, and the color paste is acrylic carbon black paste.

[0045] Example 1: An alcohol-resistant marker ink This embodiment provides an alcohol-resistant marker ink, comprising the following components in parts by weight: The composition includes 2.24 parts of chloroacetic acid resin, 0.75 parts of aldehyde-ketone resin, 1.49 parts of acrylic resin, 16.40 parts of ethyl acetate, 7.07 parts of acetone, 23.86 parts of propylene glycol methyl ether acetate, 11.09 parts of ethylene glycol ethyl ether, 8.23 ​​parts of ethylene glycol diacetate, 10.14 parts of adhesion promoter, 2.09 parts of alcohol-resistant additive, 1.19 parts of leveling agent, 0.54 parts of liquid paraffin, and 14.91 parts of color paste.

[0046] The alcohol-resistant marker ink is prepared by the following method: (1) Resin dissolution: Chlorinated vinyl resin, aldehyde resin and acrylic resin are slowly added to a mixed solvent composed of acetone, ethyl acetate and ethylene glycol diacetate, heated and stirred at 60°C until completely transparent, with a stirring speed of 300 rpm; (2) Additives: Add propylene glycol methyl ether acetate, ethylene glycol ethyl ether, adhesion promoter, alcohol-resistant additive, liquid paraffin and leveling agent in sequence, and then stir at 800 rpm for 60 min; (3) Mixing and blending: Slowly add the color paste, stir at 500 rpm for 60 min to obtain the ink; (4) Curing treatment: Let the ink prepared in step (3) stand at 25°C for 24 hours to cure; (5) Filtration and packaging: Filter three times with a filter bucket to remove impurities and undispersed particles, then bottle and seal to obtain the product.

[0047] Example 2: An alcohol-resistant marker ink This embodiment provides an alcohol-resistant marker ink, comprising the following components in parts by weight: The composition includes 1.58 parts of chloroacetic acid resin, 1.40 parts of aldehyde-ketone resin, 1.50 parts of acrylic resin, 16.40 parts of ethyl acetate, 7.07 parts of acetone, 23.86 parts of propylene glycol methyl ether acetate, 11.09 parts of ethylene glycol ethyl ether, 8.23 ​​parts of ethylene glycol diacetate, 10.14 parts of adhesion promoter, 2.09 parts of alcohol-resistant additive, 1.19 parts of leveling agent, 0.54 parts of liquid paraffin, and 14.91 parts of color paste.

[0048] The alcohol-resistant marker ink was prepared according to the method of Example 1.

[0049] Example 3: An alcohol-resistant marker ink This embodiment provides an alcohol-resistant marker ink, referring to Example 1, except that ethyl acetate is replaced with butyl acetate. Specifically, it includes the following components in parts by weight: The composition includes 2.24 parts of chloroacetic acid resin, 0.75 parts of aldehyde-ketone resin, 1.49 parts of acrylic resin, 16.40 parts of butyl acetate, 7.07 parts of acetone, 23.86 parts of propylene glycol methyl ether acetate, 11.09 parts of ethylene glycol ethyl ether, 8.23 ​​parts of ethylene glycol diacetate, 10.14 parts of adhesion promoter, 2.09 parts of alcohol-resistant additive, 1.19 parts of leveling agent, 0.54 parts of liquid paraffin, and 14.91 parts of color paste.

[0050] The alcohol-resistant marker ink was prepared according to the method of Example 1.

[0051] Example 4: An alcohol-resistant marker ink This embodiment provides an alcohol-resistant marker ink, referring to Embodiment 1, except that acetone is replaced with butanone, and specifically includes the following components calculated in parts by weight: The composition includes 2.24 parts of chloroacetic acid resin, 0.75 parts of aldehyde-ketone resin, 1.49 parts of acrylic resin, 16.40 parts of ethyl acetate, 7.07 parts of butanone, 23.86 parts of propylene glycol methyl ether acetate, 11.09 parts of ethylene glycol ethyl ether, 8.23 ​​parts of ethylene glycol diacetate, 10.14 parts of adhesion promoter, 2.09 parts of alcohol-resistant additive, 1.19 parts of leveling agent, 0.54 parts of liquid paraffin, and 14.91 parts of color paste.

[0052] The alcohol-resistant marker ink was prepared according to the method of Example 1.

[0053] Comparative Example 1: An alcohol-resistant marker ink This comparative example provides an alcohol-resistant marker ink with reference to Example 1, the difference being that it does not contain aldehyde or ketone resins or acrylic resins, and specifically includes the following components calculated in parts by weight: The composition includes 4.48 parts of chloroacetic acid resin, 16.40 parts of ethyl acetate, 7.07 parts of acetone, 23.86 parts of propylene glycol methyl ether acetate, 11.09 parts of ethylene glycol ethyl ether, 8.23 ​​parts of ethylene glycol diacetate, 10.14 parts of adhesion promoter, 2.09 parts of alcohol-resistant additive, 1.19 parts of leveling agent, 0.54 parts of liquid paraffin, and 14.91 parts of color paste.

[0054] The alcohol-resistant marker ink was prepared according to the method of Example 1.

[0055] Comparative Example 2: An alcohol-resistant marker ink This comparative example provides an alcohol-resistant marker ink with reference to Example 1, the difference being that it does not contain chloroacetic acid resin and aldehyde-ketone resin, and specifically includes the following components calculated in parts by weight: The composition includes 4.48 parts acrylic resin, 16.40 parts ethyl acetate, 7.07 parts acetone, 23.86 parts propylene glycol methyl ether acetate, 11.09 parts ethylene glycol ethyl ether, 8.23 ​​parts ethylene glycol diacetate, 10.14 parts adhesion promoter, 2.09 parts alcohol-resistant additive, 1.19 parts leveling agent, 0.54 parts liquid paraffin, and 14.91 parts color paste.

[0056] The alcohol-resistant marker ink was prepared according to the method of Example 1.

[0057] Comparative Example 3: An alcohol-resistant marker ink This comparative example provides an alcohol-resistant marker ink with reference to Example 1, the difference being that it does not contain chlorovinyl acetate resin and acrylic resin, and specifically includes the following components calculated in parts by weight: The composition includes 4.48 parts of aldehyde-ketone resin, 16.40 parts of ethyl acetate, 7.07 parts of acetone, 23.86 parts of propylene glycol methyl ether acetate, 11.09 parts of ethylene glycol ethyl ether, 8.23 ​​parts of ethylene glycol diacetate, 10.14 parts of adhesion promoter, 2.09 parts of alcohol-resistant additive, 1.19 parts of leveling agent, 0.54 parts of liquid paraffin, and 14.91 parts of color paste.

[0058] The alcohol-resistant marker ink was prepared according to the method of Example 1.

[0059] Comparative Example 4: An alcohol-resistant marker ink This comparative example provides an alcohol-resistant marker ink with reference to Example 1, the difference being that the chloroacetic acid resin, aldehyde-ketone resin, and acrylic resin are replaced with rosin resin, specifically comprising the following components calculated in parts by weight: The composition includes 4.48 parts rosin resin, 16.40 parts ethyl acetate, 7.07 parts acetone, 23.86 parts propylene glycol methyl ether acetate, 11.09 parts ethylene glycol ethyl ether, 8.23 ​​parts ethylene glycol diacetate, 10.14 parts adhesion promoter, 2.09 parts alcohol-resistant additive, 1.19 parts leveling agent, 0.54 parts liquid paraffin, and 14.91 parts color paste.

[0060] The alcohol-resistant marker ink was prepared according to the method of Example 1.

[0061] Comparative Example 5: An alcohol-resistant marker ink This comparative example provides an alcohol-resistant marker ink with reference to Example 1, the difference being that the chloroacetic acid resin, aldehyde-ketone resin, and acrylic resin are replaced with silicone resin, specifically comprising the following components in parts by weight: 4.48 parts of silicone resin, 16.40 parts of ethyl acetate, 7.07 parts of acetone, 23.86 parts of propylene glycol methyl ether acetate, 11.09 parts of ethylene glycol monoethyl ether, 8.23 parts of ethylene glycol diacetate, 10.14 parts of adhesion promoter, 2.09 parts of alcohol resistance aid, 1.19 parts of leveling agent, 0.54 parts of liquid paraffin and 14.91 parts of color paste.

[0062] The alcohol-resistant marker ink is prepared according to the method of Example 1.

[0063] Test Example 1 Alcohol Resistance Performance Test I. Experimental Method Use the marker inks prepared in Examples 1 to 4 and the marker inks prepared in Comparative Examples 1 to 5 to fill pens respectively to make markers, and then write on common substrates in the laboratory (PET material, PS material, PP material, PC material, PMMA material, HDPE material) together with commercially available alcohol-resistant markers and ordinary markers. After waiting for complete drying, wrap the upper part of a 500 g weight with three layers of cotton gauze; drip alcohol with an alcohol concentration ≥ 95 parts on the cotton gauze to make the cotton gauze fully absorb the alcohol, and it is appropriate that no alcohol flows out; pick up the weight and wipe back and forth parallel to the ink handwriting at a speed of 40 times per minute and a stroke of about 20 mm, and record the number of wiping times when the handwriting is completely wiped off.

[0064] II. Experimental Results The results are as shown in Table 1 and Figure 1 As shown, the results indicate that compared with the markers made from the marker inks of Comparative Examples 1 to 5, commercially available alcohol-resistant markers and ordinary markers, the markers made from the marker inks of Examples 1 to 4 all have better alcohol resistance on common substrates in the laboratory.

[0065] Table 1 Number of Wiping Times When the Handwriting is Completely Wiped Off

[0066] Test Example 2 Long-Term Stable Ink Output Test I. Experimental Method Use the marker inks prepared in Examples 1 to 4 and the marker inks prepared in Comparative Examples 1 to 5 to fill pens respectively to make markers, and then draw continuous lines of 30 cm on a glass slide together with commercially available alcohol-resistant markers and ordinary markers, and confirm that the initial ink output is normal, there is no ink breakage and no flying white, and confirm that the pen cap is completely tightened and the sealing is in place. Put the markers into a constant temperature oven at 37 °C for accelerated testing. During the testing period, detect at intervals. Do not flick the pen, do not press, do not squeeze the pen core, and write directly. If the ink comes out immediately when writing the first stroke, there is no ink breakage, no flying white, and no hollow line, it is qualified, and record the normal ink output time of each marker.

[0067] II. Experimental Results The ink flow performance of the markers under accelerated testing conditions at 37℃ is shown in Table 2. The results show that compared with the markers prepared in Comparative Examples 1-5, commercially available alcohol-resistant markers, and ordinary markers, the markers prepared in Examples 1-4 have better long-term ink flow performance and stronger stability. Among them, the marker in Example 1 has the best writing performance and the longest normal ink flow time.

[0068] Table 2. Liquid dispensing performance of markers under accelerated testing conditions at 37℃

[0069] Test Example 3: Marker Pen Actual Writing and Drying Speed ​​Test I. Experimental Methods The marker inks prepared in Examples 1-4 and Comparative Examples 1-5 were loaded into a pen to make a marker pen. Then, along with a commercially available alcohol-resistant marker pen and an ordinary marker pen, eight straight lines of equal length (3 cm in length and uniform line thickness) were drawn horizontally and continuously on a glass slide. A stopwatch was started at the same time as the pen was drawn. Each line was wiped with a lint-free cloth in a 5-second time gradient, and each line was wiped only once. The line was judged in turn. If the line was blurred or faded, it was not dry. If the line was intact and the wiping cloth was free of ink contamination, it was surface dry. The surface drying time was recorded.

[0070] II. Experimental Results The actual drying speed of the writing on the markers is shown in Table 3. The results show that compared with the markers prepared in Comparative Examples 1-5, commercially available alcohol-resistant markers, and ordinary markers, the markers prepared in Examples 1-4 have a significantly faster drying speed, which can effectively avoid the problem of writing smudging. Among them, the markers in Examples 1 and 2 have the fastest drying speed.

[0071] Table 3. Results of actual writing and drying speed of markers

[0072] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. An alcohol-resistant marker ink, characterized in that, It contains the following components in parts by weight: 1-3 parts chloroacetic acid resin, 0.5-1.5 parts aldehyde-ketone resin, 1-2 parts acrylic resin, 5-10 parts ketone solvent, 25-45 parts alcohol ether solvent, 22-27 parts ester solvent, 8-15 parts adhesion promoter, 1-3 parts alcohol-resistant additive, 1-2 parts leveling agent, 0.5-1 part liquid paraffin, and 10-20 parts color paste.

2. The marker ink according to claim 1, characterized in that, The ketone solvents include acetone or butanone.

3. The marker ink according to claim 1, characterized in that, The alcohol ether solvents include propylene glycol methyl ether acetate and ethylene glycol ethyl ether.

4. The marker ink according to claim 1, characterized in that, The ester solvent includes any combination of the following: Ethyl glycol diacetate and ethyl acetate; Ethylene glycol diacetate and butyl acetate.

5. The marker ink according to claim 1, characterized in that, It contains the following components in parts by weight: 1.58–2.24 parts chloroacetic acid resin, 0.75–1.4 parts aldehyde-ketone resin, 1.49–1.5 parts acrylic resin, 5–10 parts ketone solvent, 25–45 parts alcohol-ether solvent, 22–27 parts ester solvent, 8–15 parts adhesion promoter, 1–3 parts alcohol-resistant additive, 1–2 parts leveling agent, 0.5–1 part liquid paraffin, and 10–20 parts color paste.

6. The use of the marker ink according to any one of claims 1 to 5 in the preparation of marker pens.

7. The application according to claim 6, characterized in that, The marker ink improves the marker's alcohol resistance and / or the speed at which the ink dries.

8. The method for preparing marker ink according to any one of claims 1 to 5, characterized in that, Includes the following steps: S1. Add chloroacetic acid resin, aldehyde-ketone resin and acrylic resin to a mixed solvent of ketone solvent and ester solvent, heat and stir until transparent to obtain a mixture; S2. Under stirring conditions, add alcohol ether solvent, adhesion promoter, alcohol resistance agent, liquid paraffin and leveling agent to the mixture obtained in step S1, mix thoroughly, add color paste, stir evenly to obtain ink; S3. The ink obtained in step S2 is aged and impurities are removed to obtain the final product.

9. The preparation method according to claim 8, characterized in that, In step S1, the heating temperature is 55-65°C.

10. The preparation method according to claim 8, characterized in that, In step S1, the stirring speed is 300-400 rpm; in step S2, the stirring speed is 500-800 rpm.

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