Polymer conductive agent and preparation method and application thereof

Abstract

The invention provides a high-molecular conductive agent and a preparation method and application thereof, and belongs to the technical field of fine chemical assistants. Heptamethyltrisiloxane is firstly used for graft modification of oil-based dimethyl tertiary amine, and then the high-molecular conductive agent is synthesized with compounded monochloroalkane and maleic anhydride. The polymer conductive agent prepared by the invention has excellent storage stability, is not easy to freeze in winter and has strong conductivity, and the conductivity of the polymer conductive agent in a coating film can be kept for a long time. The polymer conductive agent has good compatibility with various resins, does not influence the transparency of a paint film, has small influence on the performance of the paint film, and does not rust the tank.

Description

Technical Field

[0001] The invention belongs to the technical field of fine chemical additives, and specifically relates to a polymer conductive agent and a preparation method and application thereof. Background Art

[0002] Powder coating is mainly applied by electrostatic spraying. This method uses the induction effect of a high-voltage electric field or the principle of frictional electrification to charge the powder coating and the object to be coated with opposite charges. In this way, the charged powder coating will be attracted and firmly attached to the surface of the object with the opposite charge. After that, the final coating is formed through the process of melt leveling and baking curing. Therefore, electrostatic spraying usually requires that the object to be coated has good conductivity to ensure that the powder coating can be effectively adsorbed. For non-conductive or poorly conductive substrates, a conductive film is usually applied first to improve its conductivity before electrostatic coating.

[0003] At present, the conductive agents used in conductive films mainly include the following aspects: 1. Dispersion problem: The uniformity of the dispersion of the conductive agent in the coating directly affects the conductive properties of the coating. If the dispersion is uneven, it will lead to poor local conductivity and even agglomeration, affecting the overall performance of the coating. 2. Compatibility problem: Poor compatibility between the conductive agent and the coating substrate may cause changes in the rheological properties of the coating, such as increased viscosity, decreased storage stability and other problems. 3. Transparency effect: For coatings that need to maintain transparency, some conductive agents may reduce the transparency of the coating, affecting the aesthetics and use effect. 4. Durability problem: The conductive coating may be affected by environmental factors during long-term use, resulting in a decrease in conductivity. 5. Mechanical property effect: After adding the conductive agent, the mechanical properties of the coating such as hardness, flexibility and adhesion may be affected. Especially for application scenarios that require frequent bending or stretching, it is crucial to ensure good mechanical properties of the coating.

[0004] Chinese Patent No. 201811536840.4 discloses a method for electrostatic spraying of powder coatings on non-conductive substrates, and the conductive agent used and its preparation method. The conductive agent, by mass percentage, includes the following raw materials: 2% to 3% water-soluble conductive polymer, 0.5% to 1% anionic surfactant, 1% to 1.5% thickener, 1 to 1.1% humectant, and the balance is deionized water. The conductive agent can be continuously spread on the surface of the non-conductive substrate. After the liquid film is dried, a 5 to 18 um film can be obtained. The film has a certain conductivity and can meet the conductivity required for electrostatic spraying of powder coatings. However, the low-temperature stability of the conductive agent is poor.

[0005] Therefore, there is an urgent need for a new polymer conductive agent with good conductivity and low temperature resistance. Summary of the invention

[0006] The purpose of the present invention is to provide a polymer conductive agent and a preparation method and application thereof.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides a method for preparing a polymer conductive agent, comprising the following steps:

[0009] (1) adding oleyl dimethyl tertiary amine and heptamethyl trisiloxane to dimethyl sulfoxide, heating to 70-75° C. under nitrogen protection, adding chloroplatinic acid, heating to 100-110° C., reflux reaction, and removing dimethyl sulfoxide by vacuum rotary evaporation to obtain a silyl-containing product;

[0010] The reaction equation is:

[0011]

[0012] (2) mixing the silane-containing product, the monohalogenated compound and toluene, heating to 80-85° C. under nitrogen protection, stirring for 15-18 hours, cooling and standing for 12-15 hours to obtain a silane-modified monoquaternary ammonium salt;

[0013] The reaction equation is:

[0014]

[0015] Among them, R-CH2Cl is a halogenated compound;

[0016] (3) Add maleic anhydride and p-toluenesulfonic acid to the silane-modified monoquaternary ammonium salt of step (2), raise the temperature to 115-120° C. under nitrogen protection, keep the temperature for 6-8 hours, turn off the nitrogen, and evacuate the temperature at 115-120° C. for 20-30 minutes to remove toluene to obtain a polymer conductive agent.

[0017] Furthermore, the monohalogenated compound is epichlorohydrin, 1-chlorooctane and 1-bromooctadecane in a molar ratio of 1:(1.2-1.5):(0.4-0.6).

[0018] Tertiary oleyl dimethyl amine, CAS: 28061-69-0.

[0019] Furthermore, in the step (1), the molar ratio of oleyl dimethyl tertiary amine to heptamethyl trisiloxane is (1-1.2):1.

[0020] Furthermore, in the step (1), the molar amount of chloroplatinic acid added is 40-50 ppm of heptamethyltrisiloxane.

[0021] Furthermore, the reflux reaction time in step (1) is 4-6 hours.

[0022] Furthermore, the molar ratio of the oleyl dimethyl tertiary amine to the monohalogenated compound is 1:(2-5).

[0023] Furthermore, the amount of maleic anhydride added is 1-2 times the molar amount of oleyl dimethyl tertiary amine.

[0024] Furthermore, the volume of dimethyl sulfoxide is 3-5 times the total volume of oleyl dimethyl tertiary amine and heptamethyl trisiloxane.

[0025] The second aspect of the present invention provides a polymer conductive agent obtained by the preparation method.

[0026] The third aspect of the present invention provides the use of the polymer conductive agent in electrostatic spraying.

[0027] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0028] 1. The polymer conductive agent prepared by the present invention has excellent storage stability, is not easy to freeze in winter, has strong conductivity, and the conductivity in the coating film can be maintained for a long time. The polymer conductive agent has good compatibility with various resins, does not affect the transparency of the paint film, has little effect on the performance of the paint film, and will not cause the can to rust. The polymer conductive agent has a wide range of compatibility and has good compatibility in low-polarity systems, and can be used for PU system electrostatic spraying. It does not contain halogen and is an environmentally friendly product.

[0029] 2. The present invention can significantly improve the water resistance and salt spray resistance of the paint film by introducing heptamethyl trisiloxane in the polymer quaternary ammonium salt conductive agent. Heptamethyl trisiloxane contains multiple methyl groups. After heptamethyl trisiloxane is introduced in the quaternary ammonium salt conductive agent, a hydrophobic protective layer can be formed on the paint film surface, effectively reducing the penetration of moisture and corrosive media (such as saline solution). At the same time, heptamethyl trisiloxane can improve the adhesion between the paint film and the substrate. By strengthening the interface bonding of the paint film and the substrate, the penetration of the corrosive media on the paint film and the substrate interface is reduced, thereby improving the corrosion resistance of the paint film.

[0030] 3. The present invention uses a halogenated compound with a specific ratio to improve the conductivity and low temperature stability of the polymer conductive agent. Epichlorohydrin can react with an amine group to generate a quaternary ammonium salt, increasing the ion concentration in the system. The epoxy group of epichlorohydrin can react with the amine group to generate a hydroxyl group, which can form a hydrogen bond with a water molecule, increase the polarity of the solution, and further improve the mobility of the ions. 1-Chloro-n-octane and 1-bromo-octadecane: These long-chain halogenated alkanes react with an amine group to generate long-chain quaternary ammonium salts, which also have good conductivity in the solution. Long chains can increase the interaction between molecules and form a more stable conductive network. Quaternary ammonium salts of different lengths can be mixed to form a more stable solution. Short-chain quaternary ammonium salts can provide sufficient ion concentration, while long-chain quaternary ammonium salts can provide good fluidity and stability. This mixing effect helps to maintain the uniformity and stability of the solution at low temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the compatibility of Example 1 and commercially available conductive agents in high, medium and low polar solvents; wherein 528 is the conductive agent of Example 1 and Commercially Available 2 is a commercially available conductive agent.

[0032] Figure 2 Schematic diagram of low temperature stability test of Example 1 and commercially available conductive agent; wherein 528 is the conductive agent of Example 1, and Commercially Available 2 is a commercially available conductive agent.

[0034] Figure 3 Schematic diagram of the rust resistance of the paint film to which Example 1 and a commercially available conductive agent are added; wherein 528 is the conductive agent of Example 1, and Commercially Available 2 is a commercially available conductive agent.

[0035] Figure 4 Schematic diagram of water resistance of paint film to which Example 1 and commercially available conductive agent are added; wherein 528 is the conductive agent of Example 1 and Commercially Available 2 is a commercially available conductive agent.

[0036] Figure 5 Schematic diagram of salt spray resistance of paint films to which Example 1 and commercially available conductive agents are added; wherein 528 is the conductive agent of Example 1 and Commercially Available 2 is a commercially available conductive agent. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The raw materials used in the following examples of the present invention are all commercially available products:

[0039] Oleyl dimethyl tertiary amine, CAS: 28061-69-0; structural formula:

[0040]

[0041] Heptamethyltrisiloxane, CAS: 1873-88-7; structural formula:

[0042] Dodecyldimethylamine, CAS: 112-18-5.

[0043] Example 1

[0044] This embodiment provides a polymer conductive agent, and the preparation method thereof comprises the following steps:

[0045] (1) Add 0.01 mol of oleyl dimethyl tertiary amine and 0.01 mol of heptamethyl trisiloxane to 21 g of dimethyl sulfoxide, and under nitrogen protection, heat to 72° C., add chloroplatinic acid, and add chloroplatinic acid in an amount of 45 ppm (forty-five parts per million) of heptamethyl trisiloxane; heat to 105° C., reflux for 5 h, and remove dimethyl sulfoxide by vacuum rotary evaporation to obtain a silyl-containing product;

[0046] (2) The above-mentioned silane-containing product is mixed with 0.03 mol of a monohalogenated compound and 25 g of toluene, and the mixture is heated to 82° C. under nitrogen protection, stirred for 16 hours, cooled and allowed to stand for 14 hours to obtain a silane-modified monoquaternary ammonium salt; the monohalogenated compound is epichlorohydrin, 1-chlorooctane and 1-bromooctadecane in a molar ratio of 1:1.4:0.5.

[0047] (3) Add 0.01 mol of maleic anhydride and 0.081 g of p-toluenesulfonic acid to the silane-modified monoquaternary ammonium salt of step (2), raise the temperature to 118° C. under nitrogen protection, keep the temperature for 7 hours, turn off the nitrogen, and evacuate the temperature at 118° C. for 25 minutes to remove toluene to obtain a polymer conductive agent.

[0048] Example 2

[0049] This embodiment provides a polymer conductive agent, and the preparation method thereof comprises the following steps:

[0050] (1) Add 0.012 mol of oleyl dimethyl tertiary amine and 0.01 mol of heptamethyl trisiloxane to 21 g of dimethyl sulfoxide, and under nitrogen protection, heat to 70° C., add chloroplatinic acid, and add chloroplatinic acid in an amount of 40 ppm of heptamethyl trisiloxane; heat to 100° C., reflux for 5 h, and remove dimethyl sulfoxide by vacuum rotary evaporation to obtain a silyl-containing product;

[0051] (2) mixing the silane-containing product with 0.02 mol of a monohalogenated compound and 25 g of toluene, heating to 80° C. under nitrogen protection, stirring for 15 h, cooling and standing for 15 h to obtain a silane-modified monoquaternary ammonium salt; the monohalogenated compound is epichlorohydrin, 1-chlorooctane and 1-bromooctadecane in a molar ratio of 1:1.2:0.4;

[0052] (3) Add 0.015 mol of maleic anhydride and 0.081 g of p-toluenesulfonic acid to the silane-modified monoquaternary ammonium salt of step (2), raise the temperature to 120° C. under nitrogen protection, keep the temperature for 6 hours, turn off the nitrogen, and evacuate the temperature at 115° C. for 20 minutes to remove toluene to obtain a polymer conductive agent.

[0053] Comparative Example 1

[0054] The difference between this comparative example and Example 1 is that heptamethyltrisiloxane is not introduced.

[0055] A polymer conductive agent, the preparation method of which comprises the following steps:

[0056] (1) Mixing oleyl dimethyl tertiary amine with 0.03 mol of a monohalogenated compound and 25 g of toluene, heating to 82° C. under nitrogen protection, stirring for 16 h, cooling and standing for 14 h to obtain a silane-modified monoquaternary ammonium salt; the monohalogenated compound is epichlorohydrin, 1-chlorooctane and 1-bromooctadecane in a molar ratio of 1:1.4:0.5.

[0057] (2) Add 0.01 mol of maleic anhydride and 0.081 g of p-toluenesulfonic acid to the silane-modified monoquaternary ammonium salt of step (1), raise the temperature to 118° C. under nitrogen protection, keep the temperature for 7 hours, turn off the nitrogen, and evacuate the temperature at 118° C. for 25 minutes to remove toluene to obtain a polymer conductive agent.

[0058] Comparative Example 2

[0059] The difference between this comparative example and Example 1 is that the monohalogenated compound is epichlorohydrin, 1-chlorooctane and 1-bromooctadecane in a molar ratio of 1:1:1.

[0060] A polymer conductive agent, the preparation method of which comprises the following steps:

[0061] (1) Add 0.01 mol of oleyl dimethyl tertiary amine and 0.01 mol of heptamethyl trisiloxane to 21 g of dimethyl sulfoxide, and under nitrogen protection, heat to 72° C., add chloroplatinic acid, and add chloroplatinic acid in an amount of 45 ppm of heptamethyl trisiloxane; heat to 105° C., reflux for 5 h, and remove dimethyl sulfoxide by vacuum rotary evaporation to obtain a silyl-containing product;

[0062] (2) The silane-containing product is mixed with 0.03 mol of a monohalogenated compound and 25 g of toluene, and the mixture is heated to 82° C. under nitrogen protection, stirred for 16 hours, cooled and allowed to stand for 14 hours to obtain a silane-modified monoquaternary ammonium salt; the monohalogenated compound is epichlorohydrin, 1-chlorooctane and 1-bromooctadecane in a molar ratio of 1:1:1.

[0063] (3) Add 0.01 mol of maleic anhydride and 0.081 g of p-toluenesulfonic acid to the silane-modified monoquaternary ammonium salt of step (2), raise the temperature to 118° C. under nitrogen protection, keep the temperature for 7 hours, turn off the nitrogen, and evacuate the temperature at 118° C. for 25 minutes to remove toluene to obtain a polymer conductive agent.

[0064] Comparative Example 3

[0065] The difference between this comparative example and Example 1 is that the monohalogenated compound is epichlorohydrin.

[0066] A polymer conductive agent, the preparation method of which comprises the following steps:

[0067] (1) Add 0.01 mol of oleyl dimethyl tertiary amine and 0.01 mol of heptamethyl trisiloxane to 21 g of dimethyl sulfoxide, and under nitrogen protection, heat to 72° C., add chloroplatinic acid, and add chloroplatinic acid in an amount of 45 ppm of heptamethyl trisiloxane; heat to 105° C., reflux for 5 h, and remove dimethyl sulfoxide by vacuum rotary evaporation to obtain a silyl-containing product;

[0068] (2) The silane-containing product is mixed with 0.03 mol of a monohalogenated compound and 25 g of toluene, and the mixture is heated to 82° C. under nitrogen protection, stirred for 16 h, cooled and allowed to stand for 14 h to obtain a silane-modified monoquaternary ammonium salt; the monohalogenated compound is epichlorohydrin.

[0069] (3) Add 0.01 mol of maleic anhydride and 0.081 g of p-toluenesulfonic acid to the silane-modified monoquaternary ammonium salt of step (2), raise the temperature to 118° C. under nitrogen protection, keep the temperature for 6-8 hours, turn off the nitrogen, and evacuate the temperature at 118° C. for 25 minutes to remove toluene to obtain a polymer conductive agent.

[0070] Comparative Example 4

[0071] The difference between this comparative example and Example 1 is that heptamethyltrisiloxane is not introduced, and oleyl dimethyl tertiary amine is replaced by dodecyl dimethyl amine;

[0072] A polymer conductive agent, the preparation method of which comprises the following steps:

[0073] (1) Dodecyldimethylamine is mixed with 0.03 mol of a monohalogenated compound and 25 g of toluene, and the mixture is heated to 82° C. under nitrogen protection, stirred for 16 h, cooled and allowed to stand for 14 h to obtain a silane-modified monoquaternary ammonium salt; the monohalogenated compound is epichlorohydrin, 1-chlorooctane and 1-bromooctadecane in a molar ratio of 1:1.4:0.5.

[0074] (2) Add 0.01 mol of maleic anhydride and 0.081 g of p-toluenesulfonic acid to the silane-modified monoquaternary ammonium salt of step (1), raise the temperature to 118° C. under nitrogen protection, keep the temperature for 7 hours, turn off the nitrogen, and evacuate the temperature at 118° C. for 25 minutes to remove toluene to obtain a polymer conductive agent.

[0075] Performance Testing

[0076] The polymer conductive agents prepared in Examples 1-2 and Comparative Examples 1-4 and a commercially available conductive agent (N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate, CAS registration number 118612-00-3) were subjected to performance tests.

[0077] 1. Conductive performance test: Mixed solvents were prepared in proportion (xylene: n-butanol volume ratio = 9:1), and conductive agents were added respectively. The amount of conductive agent added to the mixed solvent accounted for 0%, 0.2%, 0.4%, 0.6%, and 0.8% of the mass fraction of the mixed solvent respectively. The resistance value was tested with an ohmmeter (ZC25-3 insulation resistance meter 0-500 megohms). The size of the resistance value reflects the conductive performance of the additive in the system.

[0078] The results are shown in Table 1.

[0079] Table 1 Conductivity test results

[0080]

[0081]

[0082] It can be seen from the results that the conductive agent of Examples 1-2 can effectively reduce the system resistance and improve the conductivity, which is better than commercially available products. The composition of the monohalogenated compound in Comparative Examples 2 and 3 is different, and the conductivity decreases. In Comparative Example 1, heptamethyltrisiloxane is not introduced, and the conductivity decreases. The analysis shows that the introduction of heptamethyltrisiloxane can improve the dispersibility of the conductive agent, ensure the uniform distribution of the conductive agent molecules, and the uniformly distributed conductive agent can form a more continuous conductive network, improving the overall conductivity. In Comparative Example 4, heptamethyltrisiloxane is not introduced, and the oil-based dimethyl tertiary amine is replaced by dodecyl dimethyl amine. The conductivity is lower than that of Examples 1-2, and also lower than that of Comparative Example 1, indicating that the system of the present invention uses oil-based dimethyl tertiary amine to prepare a polymer conductive agent with better effect.

[0083] 2. Compatibility test: Take 50g of xylene, butyl ester, and diacetone alcohol, add 2wt% of conductive agent, stir evenly and observe whether turbidity and stratification occur. The results are shown in Table 2. The results of Example 1 and commercial products are shown in Figure 2. Figure 1 .

[0084] Table 2 Compatibility test results

[0085]

[0086]

[0087] The results show that the polymer conductive agent prepared in Example 1-2 has good compatibility in high, medium and low polar solvents.

[0088] 3. Low temperature stability test: Store the conductive agent at -5°C for 72 hours and observe whether it is frozen.

[0089] The results are shown in Table 3 and Figure 2 .

[0090] Table 3 Low temperature stability test

[0091] stability Example 1 No freezing Example 2 No freezing Comparative Example 1 There is freezing Comparative Example 2 There is freezing Comparative Example 3 There is freezing Comparative Example 4 There is freezing Commercially available products There is freezing

[0092] Compared with commercially available 2, the conductive agent of Example 1-2 has excellent low temperature stability. The ratio of the halogenated compound in Comparative Examples 2 and 3 is changed, and the low temperature stability decreases. In Comparative Examples 1 and 4, heptamethyltrisiloxane is not introduced, and the low temperature stability decreases. Analysis shows that the introduction of heptamethyltrisiloxane can reduce the viscosity of the conductive agent solution and improve its fluidity. The long chain structure of heptamethyltrisiloxane can form a physical barrier in the solution, preventing the orderly arrangement of water molecules and inhibiting the growth of ice crystals. This physical barrier can effectively prevent the formation and expansion of ice crystals.

[0093] 4. Rust resistance test: Prepare a mixed solvent in proportion (xylene: n-butanol volume ratio = 9:1), add 1wt% of Example 1 and a commercially available conductive agent to the mixed solvent, put it into an iron can, then put the polished iron sheet in it, and place it at room temperature for 5 days to observe the rust on the surface of the iron sheet. The results are shown in Figure 3 Compared with commercially available conductive agents, the conductive agent of Example 1 is less likely to cause corrosion on metal surfaces.

[0094] 5. Water resistance and salt spray resistance test of paint film: acrylic baking varnish was prepared in proportion, see Table 5. 0.2 wt% of commercially available conductive agent and 0.4 wt% of conductive agent of Example 1 were added respectively.

[0095] Table 4 Acrylic paint formula

[0096]

[0097] (1) Paint film water resistance test: After diluting, spray it on a polished iron plate, bake it at 150℃ for 30 minutes, then boil it in boiling water for 2 hours and observe the severity of blistering on the surface. Figure 4 .

[0098] (2) Paint film salt spray resistance test: After diluting, spray on the polished iron plate, bake at 150℃ for 30 minutes, scratch the iron plate paint film with a knife and place it in the salt spray machine for 24 hours, and observe the severity of blistering or rust on the surface. Figure 5 .

[0099] The results show that, compared with commercially available conductive agents, the conductive agent of Example 1 will not affect the water resistance of the paint film, and will not affect the salt spray resistance of the paint film.

[0100] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for preparing a polymer conductive agent, characterized in that: The following steps are involved: (1) adding oleyl dimethyl tertiary amine and heptamethyl trisiloxane to dimethyl sulfoxide, heating to 70-75° C. under nitrogen protection, adding chloroplatinic acid, heating to 100-110° C., reflux reaction, and removing dimethyl sulfoxide by vacuum rotary evaporation to obtain a silyl-containing product; The reaction equation is: (2) mixing the silane-containing product, the monohalogenated compound and toluene, heating to 80-85° C. under nitrogen protection, stirring for 15-18 hours, cooling and standing for 12-15 hours to obtain a silane-modified monoquaternary ammonium salt; The reaction equation is: Among them, R-CH2Cl is a halogenated compound; (3) Add maleic anhydride and p-toluenesulfonic acid to the silane-modified monoquaternary ammonium salt of step (2), raise the temperature to 115-120° C. under nitrogen protection, keep the temperature for 6-8 hours, turn off the nitrogen, and evacuate the temperature at 115-120° C. for 20-30 minutes to remove toluene to obtain a polymer conductive agent.

2. The method for preparing a polymer conductive agent according to claim 1, characterized in that: The monohalogenated compound is epichlorohydrin, 1-chlorooctane and 1-bromooctadecane in a molar ratio of 1:(1.2-1.5):(0.4-0.6).

3. The method for preparing a polymer conductive agent according to claim 1, characterized in that: In the step (1), the molar ratio of oleyl dimethyl tertiary amine to heptamethyl trisiloxane is (1-1.2):

1.

4. The method for preparing a polymer conductive agent according to claim 1, characterized in that: The molar amount of chloroplatinic acid added in step (1) is 40-50 ppm of heptamethyltrisiloxane.

5. The method for preparing a polymer conductive agent according to claim 1, characterized in that: The reflux reaction time in step (1) is 4-6 hours.

6. The method for preparing a polymer conductive agent according to claim 1, characterized in that: The molar ratio of the oleyl dimethyl tertiary amine to the monohalogenated compound is 1:(2-5).

7. The method for preparing a polymer conductive agent according to claim 1, characterized in that: The amount of maleic anhydride added is 1-2 times the molar amount of oleyl dimethyl tertiary amine.

8. The method for preparing a polymer conductive agent according to claim 1, characterized in that: The volume of dimethyl sulfoxide is 3-5 times the total volume of oleyl dimethyl tertiary amine and heptamethyl trisiloxane.

9. A polymer conductive agent obtained by the preparation method according to any one of claims 1 to 8.

10. Use of a polymer conductive agent prepared by the preparation method according to any one of claims 1 to 8 in electrostatic spraying.

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