Salt-fog-resistant and damp-heat-resistant ink as well as preparation method and application thereof
By introducing acrylates with caprolactone-containing ring-opening structures into UVLED inks to form a hydrophobic barrier and flexible cross-linking network with reactive diluents, the problem of insufficient salt spray and damp heat resistance of low-viscosity inks is solved, and high salt spray and damp heat resistance of ink films is achieved.
Patent Information
- Application Number
- CN202510984903.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-16
- Publication Date
- 2026-02-27
AI Technical Summary
Existing low-viscosity UV LED varnishes and colored inks have poor resistance to salt spray and damp heat, resulting in poor performance in practical applications.
The use of acrylates with caprolactone-containing ring-opening structures in combination with reactive diluents forms a hydrophobic barrier and a flexible cross-linked network, enhancing the ink film's resistance to salt spray and damp heat.
It significantly improves the ink film's resistance to salt spray and damp heat, prevents film peeling and substrate corrosion, and extends the service life of the printed material.
Smart Images
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Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of ink printing and spraying, and in particular to a salt mist and humidity resistant ink as well as a preparation method and application thereof. BACKGROUND
[0002] The viscosity of low-viscosity UVLED gloss oil and colored ink at 25℃ is usually 5-20 cps. In this low-viscosity formula, the proportion of acrylic monomer is high, and the proportion of acrylic oligomer is low. Due to the relatively low crosslinking density of acrylic monomer and the relatively high crosslinking density of acrylic resin, the low proportion of oligomer will result in insufficient compactness of the UVLED ink film. This lack of compactness will further affect the salt mist and humidity resistance of the ink film, making it perform poorly in actual application. SUMMARY
[0003] Therefore, the technical problem to be solved by the present application is to overcome the defects of poor salt mist and humidity resistance of the low-viscosity ink in the prior art, so as to provide a salt mist and humidity resistant ink as well as a preparation method and application thereof.
[0004] To this end, the present application provides the following technical solutions:
[0005] In a first aspect, the present application provides a salt mist and humidity resistant ink, comprising the following components by mass fraction:
[0006] 10%-30% of caprolactone ring-opening structure-containing acrylate, 40%-80% of reactive diluent, 0-10% of acrylate oligomer A, 5%-15% of photoinitiator, 0.5%-2% of auxiliary agent, and 0-5% of pigment.
[0007] The caprolactone ring-opening structure-containing acrylate includes caprolactone ring-opening structure-containing acrylate oligomer B or caprolactone ring-opening structure-containing acrylate monomer.
[0008] The caprolactone ring-opening structure-containing acrylate includes one or more of SR495B, EM2692, DAY-0213, PLACCEL M, PLACCEL F, ZIYU1005, HECLA, Photomer 6891-20, Photomer 6210, and Photomer 4173.
[0009] The reactive diluent includes one or more of monofunctionality acrylate monomer, bifunctionality acrylate monomer, and multifunctionality acrylate monomer with a functionality of ≥3.
[0010] In an optional embodiment, the monofunctional acrylate monomer includes one or more of 4-tert-butylcyclohexyl acrylate, tetrahydrofurfuryl acrylate, N-vinylpyrrolidone, benzyl acrylate, N,N-diethyl-2-acrylamide, N,N-dimethylacrylamide, N-acryloylmorpholine, 2-phenoxyethyl acrylate, and isobornyl acrylate.
[0011] In an optional embodiment, the bifunctional acrylate monomer includes one or more of neopentyl glycol diacrylate, dipropylene glycol diacrylate, 1,6-hexanediol diacrylate, tripropylene glycol diacrylate, and 3-methyl-1,5-pentanediol diacrylate.
[0012] In an optional embodiment, the multifunctional acrylic monomer with a functionality ≥3 includes one or more of trimethylolpropane triacrylate, trimethylolpropane ethoxytriacrylate, and trimethylolpropane propoxytriacrylate.
[0013] In an optional embodiment, the reactive diluent comprises benzyl acrylate, 4-tert-butylcyclohexyl acrylate, tetrahydrofurfuryl acrylate, 1,6-hexanediol diacrylate, and trimethylolpropane triacrylate, wherein the mass ratio of benzyl acrylate, 4-tert-butylcyclohexyl acrylate, tetrahydrofurfuryl acrylate, 1,6-hexanediol diacrylate, and trimethylolpropane triacrylate is (2-4):(2-4):(2-3):(2-3):(0-1).
[0014] In an optional embodiment, the acrylate oligomer A includes one or more of polyester acrylate oligomers, polyurethane acrylate oligomers, and epoxy acrylate oligomers.
[0015] In an optional embodiment, the acrylate oligomer A includes one or more of EB870, EB810, EB81, EB1360, EB1029, 6043, CN293, CN2300, CN2301, CN2302, CN2303, CN2304, CN3755, CN3751, 6225, HP6400, HP6220, and MH5203.
[0016] In an optional embodiment, the acrylate oligomer A comprises CN2302 and HP6400, wherein the mass ratio of CN2302 to HP6400 is (0-1):(0-1).
[0017] In one optional embodiment, the photoinitiator has an absorption wavelength range of 365 nm to 395 nm.
[0018] In an optional embodiment, the photoinitiator includes one or more of α-hydroxy ketone initiators, α-amino ketone initiators, phosphine oxide initiators, thioxanthone initiators, and amine photosensitizers.
[0019] In one alternative embodiment, the additive includes one or more of leveling agents and polymerization inhibitors.
[0020] In an optional embodiment, the leveling agent includes one or more of BYK-333, BYK-3500, BYK-3505, BYK-3760, EFKA FL3199, WE3220, TEGO2300, TEGO2500, SW452, and MFPAEX.
[0021] In one alternative embodiment, the polymerization inhibitor includes one or more of antioxidants and light stabilizers.
[0022] In one alternative embodiment, the pigment includes one or more of cyan, yellow, magenta, and black pigments.
[0023] In an alternative implementation, SR495B was purchased from Sartoma, EM2692 from Changxing Materials Industry Co., Ltd., DAY-0213 from Changsha Taiya Chemical Technology Co., Ltd., PLACEL M and PLACEL F from Daicel (China) Investment Co., Ltd., ZIYU1005 from Hunan Jinziyu New Materials Technology Co., Ltd., HECLA from BASF, and Photomer 6891-20, Photomer 6210, and Photomer 4173 from IGM Resins.
[0024] In an optional embodiment, the acrylate containing the caprolactone ring-opening structure is preferably one or more of SR495B, DAY-0213, ZIYU1005, and Photomer 4173.
[0025] In an optional implementation, EB870, EB810, EB81, EB1360, and EB1029 were purchased from ZIN New Resins (China) Co., Ltd., 6043 was purchased from Ruiang Trading (Shanghai) Co., Ltd., CN293, CN2300, CN2301, CN2302, CN2303, CN2304, CN3755, and CN3751 were purchased from Sartoma, 6225 was purchased from Shanghai Baigao Polymer Materials Co., Ltd., and HP6400, HP6220, and MH5203 were purchased from Guangzhou Haohui New Materials Co., Ltd.
[0026] In an optional embodiment, the photoinitiator comprises one or more of 2,2-diethoxyacetophenone, 2-hydroxy-2-methylphenylpropane-1-one, 1-hydroxy-cyclohexyl-phenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone, 2-benzylmethyl-2-dimethylamino-1-(4-morpholinophenyl)-1-butanone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, isopropylthioxanthraquinone, 1-chloro-4-propoxythioxanthraquinone-9-one, diethylthioxanthraquinone, and ethyl 4-dimethylaminobenzoate.
[0027] 2,2-Diethoxyacetophenone (DEAP), 2-hydroxy-2-methylphenylpropane-1-one (1173), 1-hydroxy-cyclohexyl-phenyl ketone (184), 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone (907), 2-benzylmethyl-2-dimethylamino-1-(4-(4-morpholino)phenyl)-1-butanone (369) were purchased from BASF AG, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO), bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide (819), isopropylthioxanthraquinone (ITX), 1-chloro-4-propoxythioxanthraquinone-9-one (CPTX), diethylthioxanthraquinone (DETX), and ethyl 4-dimethylaminobenzoate (EDAB) were purchased from IGM Resins.
[0028] In an optional embodiment, the photoinitiator comprises 819, TPO and ITX; the mass ratio of 819, TPO and ITX is (0-2):(1-4):(1-4).
[0029] In an optional implementation, BYK-333, BYK-3500, BYK-3505, and BYK-3760 were purchased from BYK Chemie AG, Germany; EFKA FL3199 and WE3220 were purchased from BASF AG; TEGO2300 and TEGO2500 were purchased from Evonik Industries AG, Germany; and SW452 and MFPAEX were purchased from Pioneering Chemicals Ltd.
[0030] In an optional embodiment, the leveling agent is preferably one or more of BYK-333, BYK-3505, and BYK-3500.
[0031] In one optional embodiment, the antioxidant includes one or two of butylated hydroxytoluene and p-methoxyphenol; the light stabilizer includes one or more of Irgastab UV-22, Irgastab UV-25, and UV292.
[0032] In one alternative embodiment, butylated hydroxytoluene (BHT) and p-methoxyphenol (MEHQ) were purchased from Merck, and Irgastab UV-22, Irgastab UV-25, and UV292 were purchased from BASF AG.
[0033] In an optional embodiment, the polymerization inhibitor is preferably one or more of rgastab UV-22, Irgastab UV-25, and UV292.
[0034] Secondly, the present invention provides a method for preparing an ink resistant to salt spray and damp heat, comprising the following steps:
[0035] The components are mixed and filtered to obtain the salt spray and humid heat resistant ink.
[0036] In one optional embodiment, the salt spray and damp heat resistant ink includes varnish or colored ink; when the salt spray and damp heat resistant ink is varnish, no pigment needs to be added; when the salt spray and damp heat resistant ink is colored ink, pigment is added as needed.
[0037] In an optional embodiment, the cyan pigment (C pigment) includes one or more of CI pigment blue 15:1, CI pigment blue 15:4, CI pigment blue 2, and CI pigment blue 28, preferably CI pigment blue 15:4; the magenta pigment (M pigment) includes one or more of CI pigment red 122, CI pigment red 146, CI pigment violet 19, and CI pigment violet 23, preferably CI pigment red 122; the yellow pigment (Y pigment) includes one or more of CI pigment yellow 83, CI pigment yellow 93, CI pigment yellow 155, and CI pigment yellow 215, preferably CI pigment yellow 155; and the black pigment (K pigment) includes one or more of CI pigment black 7, preferably CI pigment black 7.
[0038] In an optional embodiment, the process of mixing the components in preparing the varnish includes: mixing acrylate monomers containing caprolactone ring-opening structures and reactive diluents, performing a first stirring, adding acrylate oligomer B and acrylate oligomer A containing caprolactone ring-opening structures after the first stirring, performing a second stirring, and then adding additives and photoinitiators, and performing a third and fourth stirring in sequence.
[0039] If the varnish does not contain acrylate oligomer B and acrylate oligomer A with caprolactone ring-opening structures, then the step of adding them and performing the second stirring is omitted.
[0040] In one optional embodiment, the first stirring speed is 700 r / min-900 r / min, and the time is 0.3 h-0.7 h; the second stirring speed is 700 r / min-900 r / min, and the time is 0.3 h-0.7 h; the third stirring speed is 100 r / min-300 r / min, and the time is 8 h-12 h; the fourth stirring speed is 1400 r / min-1600 r / min, and the time is 0.8 h-1.2 h.
[0041] In an optional embodiment, the process of mixing the components in preparing the colored ink includes: mixing acrylate monomers containing caprolactone ring-opening structures and reactive diluents, performing a fifth stirring; after the fifth stirring, adding acrylate oligomer B and acrylate oligomer A containing caprolactone ring-opening structures, performing a sixth stirring; then adding additives and pigments, performing a seventh and eighth stirring in sequence; finally adding a photoinitiator, performing a ninth and tenth stirring in sequence.
[0042] If the colored ink does not contain acrylate oligomer B and acrylate oligomer A with caprolactone ring-opening structures, then the sixth stirring step of adding them is omitted.
[0043] In one optional embodiment, the fifth stirring speed is 700 r / min-900 r / min, and the time is 0.3 h-0.7 h; the sixth stirring speed is 700 r / min-900 r / min, and the time is 0.3 h-0.7 h; the seventh stirring speed is 100 r / min-300 r / min, and the time is 8 min-12 min; the eighth stirring speed is 1400 r / min-1600 r / min, and the time is 0.8 h-1.2 h; the ninth stirring speed is 100 r / min-300 r / min, and the time is 8 min-12 min; and the tenth stirring speed is 1400 r / min-1600 r / min, and the time is 0.8 h-1.2 h.
[0044] In one optional embodiment, the filtration membrane has a pore size ≤ 2 μm.
[0045] Thirdly, the present invention provides a method for preparing a salt spray and damp heat resistant ink, and the application of the prepared salt spray and damp heat resistant ink in ink printing or spraying.
[0046] In an alternative implementation, it is used in printing on PET, PVC, paper, metal, and plexiglass surfaces.
[0047] The technical solution of this invention has the following advantages:
[0048] 1. This invention provides an ink resistant to salt spray and damp heat, comprising the following components by mass fraction: 10%-30% acrylate containing a caprolactone ring-opening structure, 40%-80% reactive diluent, 0-10% acrylate oligomer A, 5%-15% photoinitiator, 0.5%-2% additives, and 0-5% pigment; wherein the acrylate containing a caprolactone ring-opening structure includes acrylate oligomer B containing a caprolactone ring-opening structure or acrylate monomer containing a caprolactone ring-opening structure.
[0049] This invention effectively solves the problem of poor salt spray and damp heat resistance of UVLED-cured inkjet printing inks by using acrylates containing caprolactone ring-opening structures in combination with reactive diluents (and optional acrylate oligomer A), while ensuring that the ink has suitable viscosity and surface tension.
[0050] The long alkyl segments (-(CH2)5-) in acrylates containing the caprolactone ring-opening structure can form a hydrophobic barrier, reducing the surface energy of the coating and decreasing water molecule adsorption and penetration. Simultaneously, its saturated structure inhibits ester bond hydrolysis, enhancing chemical stability under humid and hot conditions. Secondly, the pre-synthesized flexible polyester segments (formed by caprolactone ring-opening) in the molecular structure increase the crosslinking point spacing, reduce the effective crosslinking density, alleviate curing shrinkage stress, and reduce microcrack formation, thereby blocking the diffusion path of corrosive media such as Cl- in salt spray. Furthermore, the ester groups and other functional groups in the caprolactone-containing acrylate compound structure can also crosslink with other reactive diluents and oligomers in the system, forming a dense and strongly adhesive interface, further delaying coating peeling caused by humid and hot expansion or salt spray erosion. From molecular hydrophobicity and network softening to the synergistic effect of interfacial crosslinking, the salt spray resistance and humid and hot resistance of the ink film are significantly improved.
[0051] 2. The present invention effectively protects the surface of the substrate, preventing film peeling in humid or saline environments (such as sea breeze erosion), and avoids rusting of metal substrates, thus significantly delaying the aging time of the substrate. The key to this long-lasting protective effect lies in the interaction between the active groups in the acrylate containing caprolactone and the active or polar groups on the surface of the coated or bonded substrate (such as metal, wood, plastic, etc.). For example, it forms chemical bonds with hydroxyl groups on the metal surface, or tightly binds with polar groups on the surface of wood, plastic, etc., through hydrogen bonds and other forces. This significantly enhances the adhesion between the cured ink film and the adhered object or substrate, providing a solid foundation for resisting environmental erosion, preventing film peeling, and preventing substrate corrosion. Detailed Implementation
[0052] The following embodiments are provided to better understand the present invention and are not limited to the preferred embodiments described. They do not constitute a limitation on the content and scope of protection of the present invention. Any product that is the same as or similar to the present invention, derived by any person under the guidance of the present invention or by combining the features of the present invention with other prior art, falls within the protection scope of the present invention.
[0053] For experiments not specifically described in the examples, the procedures or conditions should be followed according to the conventional experimental procedures described in the literature in this field. Reagents or instruments whose manufacturers are not specified are all commercially available conventional reagent products.
[0054] Example 1
[0055] This embodiment provides an ink that is resistant to salt spray and damp heat. The ink formulation is shown in Table 1.
[0056] This embodiment also provides a method for preparing an ink that is resistant to salt spray and damp heat, including the following steps:
[0057] Acrylic monomers containing caprolactone ring-opening structures and reactive diluents are mixed and stirred at 800 r / min for 0.5 h. After that, acrylate oligomers B and A containing caprolactone ring-opening structures are added and stirred at 800 r / min for 0.5 h. Then, additives and pigments are added and stirred at 200 r / min for 10 min. The stirring speed is then increased to 1500 r / min and stirred for 1 h. Finally, photoinitiator is added and stirred at 200 r / min for 10 min. The stirring speed is then increased to 1500 r / min and stirred for 1 h. The resulting mixture is filtered using a 1 μm pore size filter membrane. The resulting liquid is the salt spray and humid heat resistant ink.
[0058] Example 2
[0059] This embodiment provides an ink that is resistant to salt spray and damp heat. The ink formulation is shown in Table 1.
[0060] This embodiment also provides a method for preparing an ink that is resistant to salt spray and damp heat, which is the same as in Example 1 (the added components are adjusted according to the formula).
[0061] Example 3
[0062] This embodiment provides an ink that is resistant to salt spray and damp heat. The ink formulation is shown in Table 1.
[0063] This embodiment also provides a method for preparing an ink that is resistant to salt spray and damp heat, which is the same as in Example 1 (the added components are adjusted according to the formula).
[0064] Example 4
[0065] This embodiment provides an ink that is resistant to salt spray and damp heat. The ink formulation is shown in Table 1.
[0066] This embodiment also provides a method for preparing an ink that is resistant to salt spray and damp heat, which is the same as in Example 1 (the added components are adjusted according to the formula).
[0067] Example 5
[0068] This embodiment provides an ink that is resistant to salt spray and damp heat. The ink formulation is shown in Table 1.
[0069] This embodiment also provides a method for preparing an ink that is resistant to salt spray and damp heat, including the following steps:
[0070] Acrylic monomers containing caprolactone ring-opening structures and reactive diluents are mixed and stirred at 800 r / min for 0.5 h. After that, acrylate oligomers B and A containing caprolactone ring-opening structures are added and stirred at 800 r / min for 0.5 h. Then, additives and photoinitiators are added and stirred at 200 r / min for 10 min. The stirring speed is then increased to 1500 r / min and stirred for 1 h. The resulting mixture is filtered using a filter membrane with a pore size of 1 μm. The resulting liquid is the salt spray and humid heat resistant ink.
[0071] Table 1. Formulations of salt spray and damp heat resistant inks in Examples 1-5.
[0072]
[0073]
[0074] Comparative Example 1
[0075] This comparative example provides an ink, the formulation of which is shown in Table 2.
[0076] This comparative example also provides a method for preparing the ink, which is the same as in Example 1 (adjusting the added components according to the formula).
[0077] Comparative Example 2
[0078] This comparative example provides an ink, the formulation of which is shown in Table 2.
[0079] This comparative example also provides a method for preparing the ink, which is the same as in Example 1 (adjusting the added components according to the formula).
[0080] Comparative Example 3
[0081] This comparative example provides an ink, the formulation of which is shown in Table 2.
[0082] This comparative example also provides a method for preparing the ink, which is the same as in Example 1 (adjusting the added components according to the formula).
[0083] Comparative Example 4
[0084] This comparative example provides an ink, the formulation of which is shown in Table 2.
[0085] This comparative example also provides a method for preparing the ink, which is the same as in Example 1 (adjusting the added components according to the formula).
[0086] Comparative Example 5
[0087] This comparative example provides an ink, the formulation of which is shown in Table 2.
[0088] This comparative example also provides a method for preparing the ink, which is the same as in Example 5 (with adjustments to the added components based on the formulation).
[0089] Table 2 shows the ink formulations for Comparative Examples 1-5.
[0090]
[0091]
[0092] Experimental Example 1
[0093] The inks obtained in Examples 1-5 and Comparative Examples 1-5 were subjected to viscosity (25°C) and surface tension (25°C) tests, respectively. The viscosity test was conducted in accordance with GB / T 13217.4-2020, and the surface tension test was conducted in accordance with GB / T 22237-2008.
[0094] At a printing speed of 20 m / min, the inks in Examples 1-5 and Comparative Examples 1-5 all exhibited good printing smoothness. After printing, an optical power of 16 W / cm² was used. 2 The inks were directly cured using a 395nm wavelength UV LED curing lamp. Each cured sample was prepared according to national standard GB 1765-79. The prepared samples underwent a neutral salt spray test at room temperature for 24 hours according to GB / T 10125-2021, followed by a cross-cut adhesion test according to national standard GB / T 9286-2021 to determine the adhesion grade (0 being the best, 5 the worst). After the salt spray performance test, the samples underwent a damp heat test at 60℃ and 80% humidity for 168 hours, followed by a cross-cut adhesion test according to national standard GB / T 9286-2021 to determine the adhesion grade (0 being the best, 5 the worst).
[0095] The performance test results of different inks are recorded in Table 3.
[0096] Table 3 Performance test results of different inks
[0097]
[0098] Table 1 shows that the viscosity and surface tension of the inks obtained in Examples 1-5 and Comparative Examples 1-5 meet the requirements of most commercially available inkjet printheads (viscosity between 5 cps and 20 cps at 25°C, surface tension between 18 mN / m and 30 mN / m). Compared to Comparative Examples 1-5, Examples 1-5 exhibit superior resistance to salt spray and damp heat.
[0099] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.
Claims
1. An ink resistant to salt spray and damp heat, characterized in that, Components including the following mass fractions: The composition includes 10%-30% acrylates with caprolactone ring-opening structure, 40%-80% reactive diluent, 0-10% acrylate oligomer A, 5%-15% photoinitiator, 0.5%-2% additives, and 0-5% pigment; The acrylate containing the caprolactone ring-opening structure includes acrylate oligomer B containing the caprolactone ring-opening structure or acrylate monomer containing the caprolactone ring-opening structure.
2. The salt spray-resistant and moisture-heat-resistant ink according to claim 1, characterized in that, The acrylates containing caprolactone ring-opening structures include one or more of SR495B, EM2692, DAY-0213, PLACEL M, PLACEL F, ZIYU1005, HECLA, Photomer 6891-20, Photomer 6210, and Photomer 4173.
3. The salt spray and damp heat resistant ink according to claim 1 or 2, characterized in that, The reactive diluent includes one or more of the following: monofunctional acrylate monomers, difunctional acrylate monomers, and multifunctional acrylate monomers with a functionality of ≥3. Optionally, the monofunctional acrylate monomer includes one or more of 4-tert-butylcyclohexyl acrylate, tetrahydrofurfuryl acrylate, N-vinylpyrrolidone, benzyl acrylate, N,N-diethyl-2-acrylamide, N,N-dimethylacrylamide, N-acryloylmorpholine, 2-phenoxyethyl acrylate, and isobornyl acrylate. The bifunctional acrylate monomers include one or more of neopentyl glycol diacrylate, dipropylene glycol diacrylate, 1,6-hexanediol diacrylate, tripropylene glycol diacrylate, and 3-methyl-1,5-pentanediol diacrylate. The multifunctional acrylic monomer with a functionality of ≥3 includes one or more of trimethylolpropane triacrylate, trimethylolpropane ethoxytriacrylate, and trimethylolpropane propoxytriacrylate.
4. The salt spray and damp heat resistant ink according to claim 1 or 2, characterized in that, The reactive diluent includes benzyl acrylate, 4-tert-butylcyclohexyl acrylate, tetrahydrofurfuryl acrylate, 1,6-hexanediol diacrylate and trimethylolpropane triacrylate, wherein the mass ratio of benzyl acrylate, 4-tert-butylcyclohexyl acrylate, tetrahydrofurfuryl acrylate, 1,6-hexanediol diacrylate and trimethylolpropane triacrylate is (2-4):(2-4):(2-3):(2-3):(0-1).
5. The salt spray and damp heat resistant ink according to claim 1 or 2, characterized in that, The acrylate oligomer A includes one or more of polyester acrylate oligomers, polyurethane acrylate oligomers, and epoxy acrylate oligomers; Optionally, the acrylate oligomer A includes one or more of EB870, EB810, EB81, EB1360, EB1029, 6043, CN293, CN2300, CN2301, CN2302, CN2303, CN2304, CN3755, CN3751, 6225, HP6400, HP6220, and MH5203; Optionally, the acrylate oligomer A includes CN2302 and HP6400, wherein the mass ratio of CN2302 to HP6400 is (0-1):(0-1).
6. The salt spray and damp heat resistant ink according to claim 1 or 2, characterized in that, The absorption wavelength range of the photoinitiator is 365nm-395nm; Optionally, the photoinitiator includes one or more of α-hydroxy ketone initiators, α-amino ketone initiators, phosphine oxide initiators, thioxanthone initiators, and amine photosensitizers.
7. The salt spray and damp heat resistant ink according to claim 1 or 2, characterized in that, The additives include one or more of leveling agents and polymerization inhibitors; Optionally, the leveling agent includes one or more of BYK-333, BYK-3500, BYK-3505, BYK-3760, EFKA FL3199, WE3220, TEGO2300, TEGO2500, SW452, and MFPAEX; Optionally, the polymerization inhibitor includes one or more of antioxidants and light stabilizers.
8. The salt spray and damp heat resistant ink according to claim 1 or 2, characterized in that, The pigments include one or more of cyan, yellow, magenta, and black pigments.
9. The method for preparing the salt spray and damp heat resistant ink according to any one of claims 1-8, characterized in that, Includes the following steps: The components are mixed and filtered to obtain the salt spray and humid heat resistant ink.
10. The application of the salt spray and damp heat resistant ink according to any one of claims 1-8 or the ink prepared by the preparation method of the salt spray and damp heat resistant ink according to claim 8 in ink printing or spraying; Optional applications include printing on PET, PVC, paper, metal, and plexiglass surfaces.