Antistatic paint and antistatic coating

Abstract

In order to solve the problem that the existing PBFDO antistatic coating is poor in water resistance and solvent resistance, the invention provides an antistatic coating which comprises poly (benzodifuran diketone) or a derivative thereof, an amino polymer and a solvent, the amino polymer is prepared from one or more of polyethyleneimine, polyacrylamide, polyallylamine, urea resin, melamine resin and benzene-substituted melamine resin. Meanwhile, the invention also discloses an antistatic coating prepared from the antistatic coating. The antistatic coating provided by the invention has excellent static electricity removal capability, can be firmly attached to the surface of an object, has excellent water resistance and weather resistance, can prolong the service life of the antistatic coating and expand the application range, and is particularly applied to some complex environments.

Description

Technical Field

[0001] This invention belongs to the field of antistatic materials technology, specifically relating to an antistatic coating and an antistatic coating layer. Background Technology

[0002] Antistatic coatings, after being applied to and dried, form a conductive layer on the surface of an object. This coating requires high electrical conductivity to dissipate charge and prevent static electricity buildup on the surface. It also needs good mechanical strength to prevent peeling. Furthermore, the coating must be environmentally resistant, unaffected by rain, temperature changes, or other factors that could damage or cause it to peel off.

[0003] Currently used antistatic coatings often employ poly(3,4-dioxyethylenethiophene) / polystyrene sulfonic acid (PEDOT / PSS) as the conductive polymer. However, PEDOT / PSS has a conductivity of only about 100-200 S / cm and poor adhesion to the substrate, easily detaching under friction. A conductive polymer called poly(benzodifuran dione) (PBFDO) offers advantages in conductivity compared to PEDOT / PSS. However, like PEDOT / PSS, PBFDO also suffers from low adhesion and poor abrasion resistance. One improvement involves adding epoxy resin to the antistatic coating, leveraging the strong adhesive properties of the ring-opening epoxy resin to enhance adhesion. However, the PBFDO conductive polymer is not very compatible with epoxy resin, which leads to a decrease in its conductivity. In addition, this type of coating has poor resistance to water and other solvents. Under the erosion of water, the polymer material in the coating will react with water, which will cause the adhesion between the coating and the substrate to gradually decrease and eventually fall off. Therefore, it is difficult to apply it to some outdoor or complex environments. Summary of the Invention

[0004] To address the problem that existing PBFDO antistatic coatings have poor water and solvent resistance, this invention provides an antistatic coating and an antistatic coating layer.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] On one hand, the present invention provides an antistatic coating comprising poly(benzodifurandione) or its derivatives, an amino polymer and a solvent, wherein the amino polymer comprises one or more of polyethyleneimine, polyacrylamide, polyallylamine, urea-formaldehyde resin, melamine resin and benzo-melamine resin.

[0007] Optionally, the mass ratio of the poly(benzodifurandione) or its derivative to the amino polymer is (0.5-2):(1-10).

[0008] Optionally, the antistatic coating comprises the following components by weight:

[0009] 0.5 to 2 parts of poly(benzodifurandione) or its derivatives, 1 to 10 parts of amino polymer and 85 to 97 parts of solvent.

[0010] Optionally, the antistatic coating may further include the following components by weight:

[0011] 0.1 to 2 parts of coupling agent.

[0012] Optionally, the coupling agent is a silane coupling agent.

[0013] Optionally, the coupling agent includes one or more of γ-(methacryloyloxy)propyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, and γ-aminopropyltriethoxysilane.

[0014] Optionally, the antistatic coating may further include the following components by weight:

[0015] 0 to 0.5 parts of wetting agent.

[0016] Optionally, the wetting agent includes one or more of Dynol 604, Dynol 607, YL-405, LAG-8000, GSK-588 / 582 / 585, Tween 20, Tween 60 and Tween 80.

[0017] Optionally, the poly(benzodifurandione) or its derivatives have the following general structural formula:

[0018]

[0019] Wherein, X is selected from O, S or NR, R is selected from H, substituted or unsubstituted straight-chain or branched C1-C18 hydrocarbon groups, substituted or unsubstituted C5-C12 cyclic hydrocarbon groups; n is an integer representing the degree of polymerization of poly(benzodifuran dione) or its derivatives.

[0020] Optionally, the solvent may include water and / or dimethyl sulfoxide.

[0021] On the other hand, the present invention provides an antistatic coating obtained by curing the antistatic coating as described above.

[0022] The antistatic coating provided by this invention utilizes poly(benzodifurandione) or its derivatives in combination with specific amino polymers. Through extensive research, the inventors have discovered a synergistic relationship between poly(benzodifurandione) or its derivatives and amino polymers selected from polyethyleneimine, polyacrylamide, polyallylamine, urea-formaldehyde resin, melamine resin, and benzo-melamine resin. Compared to other resins such as epoxy resin, the amino groups of amino polymers are electron-rich groups, which is beneficial for constructing donor-acceptor structural systems and improving intermolecular charge carrier transport capabilities, thereby ensuring sufficient conductivity of poly(benzodifurandione) or its derivatives. This invention effectively enhances the antistatic ability of poly(benzodifurandione) or its derivatives, which can combine with amino groups through ionic electrostatic forces. The amino polymer acts as a bridging point for different PBFDO segments, which helps to improve the overall stability of the antistatic coating. The resulting coating has good adhesion, water resistance, alcohol resistance, and mechanical properties. Therefore, the antistatic coating prepared by the antistatic coating provided by this invention has excellent static removal ability, can firmly adhere to the surface of objects, and has excellent water resistance and weather resistance, which can extend the service life of the antistatic coating and expand its application range, especially in some complex environments. Detailed Implementation

[0023] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] One embodiment of the present invention provides an antistatic coating comprising poly(benzodifurandione) or its derivatives, an amino polymer, and a solvent, wherein the amino polymer comprises one or more of polyethyleneimine, polyacrylamide, polyallylamine, urea-formaldehyde resin, melamine resin, and benzo-melamine resin.

[0025] Through extensive research, the inventors discovered a synergistic relationship between poly(benzodifurandione) or its derivatives and amino polymers selected from polyethyleneimine, polyacrylamide, polyallylamine, urea-formaldehyde resin, melamine resin, and benzo-melamine resin. Compared to other resins such as epoxy resin, the amino groups of amino polymers are electron-rich groups, which is beneficial for constructing donor-acceptor structural systems and improving the intermolecular charge carrier transport capacity. This ensures the full utilization of the conductivity of poly(benzodifurandione) or its derivatives, effectively improving its antistatic ability. More importantly, poly(benzodifurandione) or its derivatives can combine with amino groups through ionic electrostatic forces. The amino polymer acts as a bridging point for different PBFDO segments, which helps improve the overall stability of the antistatic coating. The resulting coating has good adhesion, water resistance, alcohol resistance, and mechanical properties. Therefore, the antistatic coating prepared by the antistatic coating provided by this invention has excellent static removal ability, can firmly adhere to the surface of objects, and has excellent water resistance and weather resistance, which can extend the service life of the antistatic coating and expand its application range, especially in some complex environments.

[0026] In some embodiments, the mass ratio of the poly(benzodifurandione) or its derivatives to the amino polymer is (0.5-2):(1-10).

[0027] In specific embodiments, the mass ratio of the poly(benzodifurandione) or its derivatives to the amino polymer can be 0.5:10, 0.6:9, 0.8:8, 0.9:7, 1:6, 1.2:5, 1.3:4, 1.6:3, 1.8:2, 2:2 or 2:1.

[0028] When the mass ratio of the poly(benzodifurandione) or its derivatives to the amino polymer is within the above range, the poly(benzodifurandione) or its derivatives and the amino polymer have a good synergistic effect, which on the one hand has high conductivity, and on the other hand can also take into account film stability and adhesion strength to the substrate.

[0029] In some embodiments, the antistatic coating comprises the following components by weight:

[0030] 0.5 to 2 parts of poly(benzodifurandione) or its derivatives, 1 to 10 parts of amino polymer and 85 to 97 parts of solvent.

[0031] In some optional embodiments, the antistatic coating may also contain other conductive polymers, the conductive polymers being 0 to 10 parts by weight. The other conductive polymers are not particularly selected, such as polypyrrole, polythiophene, polyacene, polyphenylene, polyphenylene ethylene, polyaniline, polyacene, or polythiophene ethylene.

[0032] Specifically, the other conductive polymers include polypyrrole, poly(N-methylpyrrole), poly(3-methylpyrrole), poly(3-ethylpyrrole), poly(3-n-propylpyrrole), poly(3-butylpyrrole), poly(3-octylpyrrole), poly(3-decylpyrrole), poly(3-dodecylpyrrole), poly(3,4-dimethylpyrrole), poly(3,4-dibutylpyrrole), poly(3-carboxypyrrole), poly(3-methyl-4-carboxypyrrole), poly(3-methyl-4-carboxyethylpyrrole), poly( 3-Methyl-4-carboxybutylpyrrole), poly(3-hydroxypyrrole), poly(3-methoxypyrrole), poly(3-ethoxypyrrole), poly(3-butoxypyrrole), poly(3-methyl-4-hexyloxypyrrole), polythiophene, poly(3-methylthiophene), poly(3-ethylthiophene), poly(3-propylthiophene), poly(3-butylthiophene), poly(3-hexylthiophene), poly(3-heptylthiophene), poly(3-octylthiophene), poly(3-decylthiophene), poly(3-dodecylthiophene), poly(3-methyl-4-carboxybutylthiophene) -Octadecylthiophene), poly(3-bromothiophene), poly(3-chlorothiophene), poly(3-iodothiophene), poly(3-cyanothiophene), poly(3-phenylthiophene), poly(3,4-dimethylthiophene), poly(3,4-dibutylthiophene), poly(3-hydroxythiophene), poly(3-methoxythiophene), poly(3-ethoxythiophene), poly(3-butoxythiophene), poly(3-hexyloxythiophene), poly(3-heptoxythiophene), poly(3-octyloxythiophene), poly(3-decyloxythiophene), poly(3-... Poly(3-octadecyloxythiophene), poly(3-methyl-4-methoxythiophene), poly(3,4-ethylenedioxythiophene), poly(3-methyl-4-ethoxythiophene), poly(3-carboxythiophene), poly(3-methyl-4-carboxythiophene), poly(3-methyl-4-carboxyethylthiophene), poly(3-methyl-4-carboxybutylthiophene), polyaniline, poly(2-methylaniline), poly(3-isobutylaniline), poly(2-anilinesulfonic acid), poly(3-anilinesulfonic acid), etc.

[0033] In some optional embodiments, the antistatic coating may also contain an adhesive resin that enhances adhesion properties, wherein the adhesive resin is in the form of 0 to 10 parts by weight.

[0034] The adhesive resin can be either miscible or miscible with the necessary components of the antistatic coating, without any particular restrictions. It can be either a reactive or non-reactive resin. Furthermore, as long as it can be miscible or miscible with the antistatic coating, it can be either a thermosetting or thermoplastic resin. Examples include: polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate; fluoropolymers such as polyvinylidene fluoride, polyvinyl fluoride, polytetrafluoroethylene, ethylene tetrafluoroethylene copolymer, and polychlorotrifluoroethylene; ethylene resins such as polyvinyl alcohol, polyvinyl ether, polyvinyl butyral, polyvinyl acetate, and polyvinyl chloride; epoxy resins; xylene resins; aromatic polyamide resins; polyurethane resins; phenolic resins; polyether resins; acrylic resins and copolymers of these substances, etc.

[0035] In some embodiments, the antistatic coating further includes the following components by weight:

[0036] 0.1 to 2 parts of coupling agent.

[0037] By adding a coupling agent to the antistatic coating, the coupling agent typically includes two types of active groups: one type can interact and connect with the surface of the inorganic substrate, and the other type can entangle with or directly react with organic component molecules. This allows the coupling agent to couple the organic components and inorganic substrate in the antistatic coating, thereby improving the adhesion of the antistatic coating. At the same time, when the antistatic coating contains inorganic fillers, the coupling agent also helps to improve the dispersibility of the inorganic fillers.

[0038] In some embodiments, the coupling agent includes one or more of silane coupling agents, titanate coupling agents, aluminate coupling agents, metal composite coupling agents, phosphate coupling agents, and borate coupling agents.

[0039] In some preferred embodiments, the coupling agent is a silane coupling agent.

[0040] In a more preferred embodiment, the coupling agent comprises one or more of γ-(methacryloyloxy)propyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, and γ-aminopropyltriethoxysilane.

[0041] In some embodiments, the antistatic coating further includes the following components by weight:

[0042] 0 to 0.5 parts of wetting agent.

[0043] The addition of a wetting agent to the antistatic coating helps to improve its wetting performance by adjusting the surface tension of the antistatic coating.

[0044] In some embodiments, the wetting agent includes one or more of Dynol 604, Dynol 607, YL-405, LAG-8000, GSK-588 / 582 / 585, Tween 20, Tween 60, and Tween 80.

[0045] In some embodiments, the poly(benzodifurandione) or its derivatives have the following general structural formula:

[0046]

[0047] Wherein, X is selected from O, S or NR, R is selected from H, substituted or unsubstituted straight-chain or branched C1-C18 hydrocarbon groups, substituted or unsubstituted C5-C12 cyclic hydrocarbon groups; n is an integer representing the degree of polymerization of poly(benzodifuran dione) or its derivatives.

[0048] In some embodiments, n is selected from an integer from 3 to 100000.

[0049] In some embodiments, the poly(benzodifurandione) or its derivatives include copolymers of benzodifurandione.

[0050] In some embodiments, the solvent includes water and / or an organic solvent.

[0051] Organic solvents, for example, include: alcohol solvents such as methanol, ethanol, and isopropanol (IPA); amide solvents such as N-methylpyrrolidone (NMP), dimethylacetamide (DMAc), and dimethylformamide (DMF); ketone solvents such as methyl ethyl ketone (MEK), acetone, and cyclohexanone; ester solvents such as ethyl acetate and butyl acetate; and benzene solvents such as toluene and xylene. These substances can be used alone or in mixtures.

[0052] In some embodiments, the solvent includes water and / or dimethyl sulfoxide.

[0053] In some optional embodiments, the antistatic coating further includes filler in the form of 0 to 15 parts by weight.

[0054] In some embodiments, the filler includes conductive filler and / or non-conductive filler.

[0055] The conductive filler includes one or more of metal powders (gold, silver, copper, etc.) and carbon materials (carbon black, graphite, carbon nanotubes, etc.).

[0056] The non-conductive filler includes one or more of the following: fumed silica, titanium dioxide, mica, silicates, silica microspheres, glass fiber, and iron oxide.

[0057] In some embodiments, the antistatic coating further includes one or more additives with functions such as dispersant, leveling, defoamer, and pH adjuster.

[0058] Another embodiment of the present invention provides an antistatic coating obtained by curing the antistatic coating as described above.

[0059] There are no particular limitations on the method for applying the antistatic coating to the surface of the substrate material. Examples include brushing, spraying, dipping, roller coating, rod coating, and doctor blade coating. When the substrate material has a relatively simple shape such as plate, sheet, or film, a good antistatic layer can be obtained by any of the above coating methods. However, when the substrate material is a three-dimensional body with complex unevenness, such as having a surface with depressions or curves, or a container shape, spraying and dipping methods are preferred.

[0060] The curing method of the antistatic coating may include, for example, applying the antistatic coating onto the substrate, removing the solvent and curing it, and selectively performing heat treatment and / or ultraviolet irradiation treatment (provided that a photocurable resin is added) during or after the solvent removal process.

[0061] The present invention will be further illustrated by the following examples.

[0062] Example 1

[0063] This embodiment illustrates the antistatic coating and its preparation method disclosed in this invention, including the following operations:

[0064] Weigh the following raw materials according to parts by weight:

[0065] 0.5 parts of poly(benzodifurandione) (PBFDO), 5 parts of polyallylamine, 1 part of γ-glycidyl etheroxypropyltrimethoxysilane, 0.2 parts of Tween-60, and 92.8 parts of dimethyl sulfoxide.

[0066] The raw materials are thoroughly mixed to obtain an antistatic coating.

[0067] Example 2

[0068] This embodiment illustrates the antistatic coating and its preparation method disclosed in this invention, including the following operations:

[0069] Weigh the following raw materials according to parts by weight:

[0070] 2 parts of poly(benzodifurandione) (PBFDO), 5 parts of polyallylamine, 1 part of γ-glycidyl etheroxypropyltrimethoxysilane, 0.2 parts of Tween-60, and 91.8 parts of dimethyl sulfoxide.

[0071] The raw materials are thoroughly mixed to obtain an antistatic coating.

[0072] Example 3

[0073] This embodiment illustrates the antistatic coating and its preparation method disclosed in this invention, including the following operations:

[0074] Weigh the following raw materials according to parts by weight:

[0075] 2 parts of poly(benzodifurandione) (PBFDO), 5 parts of urea-formaldehyde resin, 1 part of γ-glycidyl etheroxypropyltrimethoxysilane, 0.2 parts of Tween-60, and 91.8 parts of dimethyl sulfoxide.

[0076] The raw materials are thoroughly mixed to obtain an antistatic coating.

[0077] Example 4

[0078] This embodiment illustrates the antistatic coating and its preparation method disclosed in this invention, including the following operations:

[0079] Weigh the following raw materials according to parts by weight:

[0080] 2 parts of poly(benzodifurandione) (PBFDO), 2 parts of polyallylamine, 1 part of γ-glycidyl etheroxypropyltrimethoxysilane, 0.2 parts of Tween-60, and 94.8 parts of dimethyl sulfoxide.

[0081] The raw materials are thoroughly mixed to obtain an antistatic coating.

[0082] Example 5

[0083] This embodiment illustrates the antistatic coating and its preparation method disclosed in this invention, including the following operations:

[0084] Weigh the following raw materials according to parts by weight:

[0085] 2 parts of poly(benzodifurandione) (PBFDO), 8 parts of polyallylamine, 1 part of γ-glycidyl etheroxypropyltrimethoxysilane, 0.2 parts of Tween-60, and 94.8 parts of dimethyl sulfoxide.

[0086] The raw materials are thoroughly mixed to obtain an antistatic coating.

[0087] Example 6

[0088] This embodiment illustrates the antistatic coating and its preparation method disclosed in this invention, including the following operations:

[0089] Weigh the following raw materials according to parts by weight:

[0090] 2 parts of poly(benzodifurandione) (PBFDO), 5 parts of polyallylamine, 1 part of γ-glycidyl etheroxypropyltrimethoxysilane, 0.2 parts of Tween-60, 30 parts of water, and 61.8 parts of dimethyl sulfoxide.

[0091] The raw materials are thoroughly mixed to obtain an antistatic coating.

[0092] Example 7

[0093] This embodiment illustrates the antistatic coating and its preparation method disclosed in this invention, including the following operations:

[0094] Weigh the following raw materials according to parts by weight:

[0095] 2 parts of poly(benzodifurandione) (PBFDO), 5 parts of urea-formaldehyde resin, 1 part of γ-aminopropyltriethoxysilane, 0.2 parts of Dynol 604, and 91.8 parts of dimethyl sulfoxide.

[0096] The raw materials are thoroughly mixed to obtain an antistatic coating.

[0097] Example 8

[0098] This embodiment illustrates the antistatic coating and its preparation method disclosed in this invention, including the following operations:

[0099] Weigh the following raw materials according to parts by weight:

[0100] 2 parts of poly(3,7-dihydrobenzo[1,2-b:4,5-b']dithiophene-2,6-dione), 2 parts of polyallylamine, 1 part of γ-glycidyl etheroxypropyltrimethoxysilane, 0.2 parts of Tween-60, and 94.8 parts of dimethyl sulfoxide.

[0101] The raw materials are thoroughly mixed to obtain an antistatic coating.

[0102] Example 9

[0103] This embodiment illustrates the antistatic coating and its preparation method disclosed in this invention, including the following operations:

[0104] Weigh the following raw materials according to parts by weight:

[0105] Two parts of (3,7-dihydrobenzo[1,2-b:4,5-b']difuran-2,6-dione)-(1,5-dipropyl-5,7-dihydro-1H,3Hpyrrolo[2,3-f]indole-2,6-dione) copolymer, two parts of polyallylamine, one part of γ-glycidyl etheroxypropyltrimethoxysilane, 0.2 parts of Tween-60, and 94.8 parts of dimethyl sulfoxide.

[0106] The raw materials are thoroughly mixed to obtain an antistatic coating.

[0107] Comparative Example 1

[0108] This comparative example is used to illustrate the antistatic coating and its preparation method disclosed in this invention, and includes the following operations:

[0109] Weigh the following raw materials according to parts by weight:

[0110] 2 parts PEDOT / PSS polymer, 4 parts waterborne epoxy resin, 1.5 parts γ-glycidyl etheroxypropyltrimethoxysilane, 0.5 parts Tween-60, 8 parts dimethyl sulfoxide, and 84 parts water.

[0111] The raw materials are thoroughly mixed to obtain an antistatic coating.

[0112] Comparative Example 2

[0113] This comparative example is used to illustrate the antistatic coating and its preparation method disclosed in this invention, and includes the following operations:

[0114] Weigh the following raw materials according to parts by weight:

[0115] 2 parts PBFDO polymer, 4 parts waterborne epoxy resin, 1.5 parts γ-glycidyl etheroxypropyltrimethoxysilane, 0.5 parts Tween-60, and 92 parts dimethyl sulfoxide.

[0116] The raw materials are thoroughly mixed to obtain an antistatic coating.

[0117] Comparative Example 3

[0118] This comparative example is used to illustrate the antistatic coating and its preparation method disclosed in this invention, and includes the following operations:

[0119] Weigh the following raw materials according to parts by weight:

[0120] 2 parts of poly(benzodifurandione) (PBFDO), 5 parts of acrylic resin, 1 part of γ-glycidyl etheroxypropyltrimethoxysilane, 0.2 parts of Tween-60, and 91.8 parts of dimethyl sulfoxide.

[0121] The raw materials are thoroughly mixed to obtain an antistatic coating.

[0122] Comparative Example 4

[0123] This comparative example is used to illustrate the antistatic coating and its preparation method disclosed in this invention, and includes the following operations:

[0124] Weigh the following raw materials according to parts by weight:

[0125] 2 parts of poly(benzodifuran dione) (PBFDO), 5 parts of polyvinylidene fluoride, 1 part of γ-glycidyl etheroxypropyltrimethoxysilane, 0.2 parts of Tween-60, and 91.8 parts of dimethyl sulfoxide.

[0126] The raw materials are thoroughly mixed to obtain an antistatic coating.

[0127] Performance testing

[0128] The antistatic coating prepared above was subjected to the following performance tests:

[0129] 1. Water resistance test: Coat the PET film with a 40-micron wire rod, then bake at 130℃ for 10 minutes to dry the film. Test the initial surface resistance and abrasion resistance. Then immerse it in water for 24 hours, bake at 130℃ for 10 minutes to dry, test the surface resistance, and use filter paper to rub to see if it peels off to evaluate the abrasion resistance.

[0130] 2. Alcohol resistance test: Coat the PET film with a 40-micron wire rod, then bake at 130℃ for 10 minutes to dry the film. Test the initial surface resistance and abrasion resistance. Then immerse it in ethanol for 24 hours, bake at 80℃ for 10 minutes to dry, test the surface resistance, and use filter paper to rub to see if it peels off to evaluate the abrasion resistance.

[0131] The test results are entered into Table 1.

[0132] Table 1

[0133]

[0134]

[0135] Comparing the test results of Examples 1-7 and Comparative Examples 1-4, it can be seen that compared with existing PEDOT / PSS coating liquids or PBFDO coating liquids (Comparative Examples 1-4), the antistatic coatings obtained by the antistatic coating provided by the present invention (Examples 1-7) have lower surface resistance and better solvent resistance. This indicates that there is a synergistic relationship between poly(benzodifuran dione) and amino polymers, which can effectively improve the overall film-forming stability of the antistatic coating. The final coating has good adhesion, water resistance, alcohol resistance, and mechanical properties. In Comparative Example 1, the PEDOT / PSS polymer, as the conductive component of the antistatic coating liquid, mixed with epoxy resin to prepare an antistatic coating with high surface resistance and poor abrasion resistance, water resistance, and alcohol resistance. In Comparative Examples 2, 3, and 4, PBFDO polymer was used, and when other types of binder resins (epoxy resin, acrylic resin, or polyvinylidene fluoride) were added, the problems of insufficient water resistance and alcohol resistance also existed.

[0136] Comparing the test results of Example 1 and Example 2, it can be seen that increasing the PBDFO content in the antistatic coating reduces the surface resistance of the antistatic coating, while the solvent resistance remains largely unchanged.

[0137] Comparing the test results of Example 2 and Example 3, it can be seen that after replacing polyallylamine with urea-formaldehyde resin, the surface resistance of the antistatic coating increases slightly, but the water resistance and solvent resistance are improved.

[0138] Comparing the test results of Examples 2, 4 and 5, it can be seen that reducing the proportion of polyallylamine in the antistatic coating liquid reduces the surface resistance of the antistatic coating, but reduces its water resistance and solvent resistance.

[0139] Comparing the test results of Example 2 and Example 6, it can be seen that replacing dimethyl sulfoxide with a water / dimethyl sulfoxide mixed solution as a solvent slightly increases the resistance of the conductive film, slightly increases the water resistance of the conductive film, and slightly decreases the alcohol resistance.

[0140] Comparing the test results of Example 2 and Example 7, it can be seen that after replacing the wetting agent, the resistance of the conductive film decreases slightly, while the water resistance and alcohol resistance of the conductive film remain basically unchanged.

[0141] Comparing the test results of Examples 4, 7 and 8, it can be seen that modifying PBDFO can adjust the water resistance or alcohol resistance of the antistatic coating.

[0142] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An antistatic coating, characterized in that, It includes poly(benzodifurandione) or its derivatives, an amino polymer, and a solvent, wherein the amino polymer includes one or more of polyethyleneimine, polyacrylamide, polyallylamine, urea-formaldehyde resin, melamine resin, and benzo-melamine resin.

2. The antistatic coating according to claim 1, characterized in that, The mass ratio of the poly(benzodifurandione) or its derivative to the amino polymer is (0.5-2):(1-10).

3. The antistatic coating according to claim 2, characterized in that, The antistatic coating comprises the following components by weight: 0.5 to 2 parts of poly(benzodifurandione) or its derivatives, 1 to 10 parts of amino polymer and 85 to 97 parts of solvent.

4. The antistatic coating according to claim 3, characterized in that, The antistatic coating also includes the following components by weight: 0.1 to 2 parts of coupling agent.

5. The antistatic coating according to claim 4, characterized in that, The coupling agent is a silane coupling agent.

6. The antistatic coating according to claim 5, characterized in that, The coupling agent includes one or more of γ-(methacryloyloxy)propyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, and γ-aminopropyltriethoxysilane.

7. The antistatic coating according to claim 3, characterized in that, The antistatic coating also includes the following components by weight: 0 to 0.5 parts of wetting agent. The wetting agent includes one or more of Dynol 604, Dynol 607, YL-405, LAG-8000, GSK-588 / 582 / 585, Tween 20, Tween 60 and Tween 80.

8. The antistatic coating according to claim 1, characterized in that, The poly(benzodifurandione) or its derivatives have the following general structural formula: Wherein, X is selected from O, S or NR, R is selected from H, substituted or unsubstituted straight-chain or branched C1-C18 hydrocarbon groups, substituted or unsubstituted C5-C12 cyclic hydrocarbon groups; n is an integer representing the degree of polymerization of poly(benzodifuran dione) or its derivatives.

9. The antistatic coating according to claim 1, characterized in that, The solvent includes water and / or dimethyl sulfoxide.

10. An antistatic coating, characterized in that, It is obtained by curing the antistatic coating as described in any one of claims 1 to 9.

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