A polyamide high-flow conductive functional masterbatch and preparation method thereof

Abstract

The present invention relates to a polyamide high-flow conductive functional masterbatch and a preparation method thereof, and belongs to the technical field of polyimide conductive masterbatch preparation. The method comprises a polyamide carrier resin, a filler, a conductive carbon black, a flow aid, a color powder, a lubricant and a conductive aid; the flow aid is formed by reacting a reactive hyperbranched polymer formed by a hyperbranching reaction of a reactive diamine and triphenylmethane triisocyanate with terminal hydroxyl silicone oil. The present invention utilizes the low viscosity and multi-cavity characteristics of the hyperbranched resin, and its cavity not only serves as a accommodating cavity for the conductive carbon black and the conductive aid in the present invention, but also its low viscosity and the low viscosity of the carrier resin give the obtained conductive masterbatch high flowability, and the flow aid is a hyperbranched imine resin, and the branched molecular chain has good compatibility with PA6, and its molecule contains a large amount of triphenylmethane, which can well capture free radicals, thereby improving the thermal stability of PA.

Description

Technical Field

[0001] The invention belongs to the technical field of polyimide conductive masterbatch preparation, and in particular relates to a polyamide high-flow conductive functional masterbatch and a preparation method thereof. Background Art

[0002] Conductive materials are an important component of conductive materials. Conductive plastics are not only rapidly used in computer anti-electromagnetic screens and smart windows, but also have broad application prospects in infusion pipelines, low-resistance plastic packaging trays for electronic products, conductive / antistatic plastic plates, sheets, foams, conductive films, solar cells, mobile phones, miniature TV screens, and even life science research. However, when ordinary conductive fillers are added to the raw resin, problems such as uneven dispersion, agglomeration, and uneven conductivity will occur, which limits the application of conductive plastics.

[0003] Conductive masterbatch is prepared by melt blending of carrier resin, conductive additive and other auxiliary additives. The conductive properties of conductive masterbatch can be adjusted to meet the required conductive requirements by adjusting the corresponding ratio of conductive material and carrier resin, such as high conductivity, conductivity, antistatic, antistatic, insulation, etc. The carrier resin in the existing conductive masterbatch can be PP, PE, PS, PA. Among them, PA has good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubrication, and has low friction coefficient, certain flame retardancy, easy processing and other properties. Conductive masterbatch with PA as carrier resin is recognized by the market. However, the PA conductive masterbatch on the current market still has various problems, such as poor fluidity, which is not conducive to mixing with the matrix resin, thereby reducing other properties of the matrix resin; for example, PA itself is easy to absorb moisture, resulting in instability of the performance of the finished product. Summary of the invention

[0004] The purpose of the present invention is to provide a polyamide high-flow conductive functional masterbatch and a preparation method thereof. The masterbatch can be directly added to a matrix resin without affecting the mechanical properties of the original resin, and can improve the fluidity, processing performance and surface gloss of the material, improve the product appearance and floating fiber phenomenon, and can be widely used in the field of conductive series plastic modification.

[0005] The first object of the present invention is to provide a polyamide high-flow conductive functional masterbatch, which includes the following raw materials by mass percentage: 34.5%-58.1% of polyamide carrier resin, 10%-20% of filler, 22%-37% of conductive carbon black, 2%-8% of flow aid, 0.1%-0.5% of color powder, 0.5%-1.5% of lubricant, and 1%-3% of conductive auxiliary agent.

[0006] Furthermore, the polyamide carrier resin is a low-viscosity PA6 resin with a relative viscosity of 2.0-2.4.

[0007] Furthermore, the filler is a mixture of at least two of diatomaceous earth, wollastonite, organic bentonite and nano-montmorillonite in any ratio, preferably a mixture of diatomaceous earth and organic bentonite, with a mass ratio of (1-3):1.

[0008] Preferably, the filler is a filler pretreated with a silane coupling agent.

[0009] Furthermore, the conductive carbon black is one or more of Ketjen black, graphene, and single-walled carbon nanotubes, preferably single-walled carbon nanotubes, with a particle size of 2-10 um.

[0010] Furthermore, the flow aid is formed by reacting a reactive hyperbranched polymer formed by a hyperbranching reaction of a reactive diamine and triphenylmethane triisocyanate with terminal hydroxyl silicone oil, and the average molecular weight of the flow aid is 15000-25000.

[0011] Furthermore, the molecular structure of the reactive diamine is as follows:

[0012]

[0013] Furthermore, the reaction of the reactive hyperbranched polymer and the hydroxy-terminated silicone oil comprises:

[0014] The reactive hyperbranched polymer and dimethyl sulfoxide are mixed evenly, and potassium carbonate and catalyst potassium iodide are added, heated to 100-110° C., terminal hydroxyl silicone oil is slowly added dropwise, and after the addition is complete, the reaction is continued for 8-10 hours, the reaction is stopped, the solvent is recovered by vacuum rotary evaporation, and the solvent is repeatedly washed with ethanol and water, and dried to obtain a flow aid, wherein the average molecular weight of the terminal hydroxyl silicone oil is 1000-2500.

[0015] Furthermore, the mass ratio of the reactive hyperbranched polymer, the hydroxyl-terminated silicone oil, potassium carbonate and potassium iodide is 100:10-25:2-6:0.2-0.5.

[0016] Further, the hyperbranching reaction comprises:

[0017] The reactive diamine, the organotin catalyst T12 and the anhydrous dioxane are mixed evenly, heated to 90-100°C, and then the anhydrous dioxane containing triphenylmethane triisocyanate is added. After the addition is complete, the reaction is continued with stirring for 6-8 hours, the reaction is stopped, and the anhydrous dioxane is recovered by vacuum rotary evaporation to obtain a reactive hyperbranched polymer.

[0018] Furthermore, the molar ratio of the reactive diamine to triphenylmethane triisocyanate is 3:1-1.8.

[0019] In the above reaction, triphenylmethane triisocyanate is added dropwise to an excess of reactive diamine, so that the periphery of the obtained reactive hyperbranched polymer is a molecule of the reactive diamine, that is, in the reactive hyperbranched polymer molecule, the periphery is a bromine substituent, thereby increasing the subsequent grafting rate of the terminal hydroxyl silicone oil.

[0020] The reaction for obtaining the reactive diamine preferably comprises:

[0021] After evenly mixing p-bromoformaldehyde, excess aniline and aniline hydrochloride, gradually heat up to 90-100°C under nitrogen protection, react for 1-2h, then continue to heat up to 130-140°C, react for 2-3h, stop the reaction, cool to 50-60°C, distill off excess aniline under reduced pressure, add hydrochloric acid, stir, filter, neutralize the filtrate with NaOH, filter, take the precipitate and wash repeatedly, recrystallize the crude product with ethanol / water, and dry to obtain reactive diamine.

[0022] Furthermore, the molar ratio of p-bromoformaldehyde, aniline and aniline hydrochloride is 1:9-10:0.05-0.08.

[0023] Furthermore, the toner is one or more of blue phase low halogen (halogen content ≤ 20 ppm) anthraquinone blue, phthalocyanine blue, ultramarine blue, solvent blue, preferably anthraquinone blue and phthalocyanine blue, more preferably phthalocyanine blue index PB15:3 and PB15:4, the mass ratio of the two is 1: (2-4), the particle size is 0.05-0.2 um, and the specific surface area is 50-80 m 2 / g.

[0024] Furthermore, the lubricant is one or more of zinc stearate, high temperature resistant OP wax, stearic acid monoglyceride, and montan wax.

[0025] Furthermore, the conductive auxiliary agent is metal powder, and the metal powder is one or more of iron powder, aluminum powder, and copper powder.

[0026] The second object of the present invention is to provide a method for preparing a polyamide high-flow conductive functional masterbatch, comprising the following steps:

[0027] The following raw materials are taken in percentage by mass: 34.5%-58.1% of polyamide carrier resin, 10%-20% of filler, 22%-37% of conductive carbon black, 2%-8% of flow aid, 0.1%-0.5% of color powder, 0.5%-1.5% of lubricant, 1%-3% of conductive auxiliary agent, and extruded and granulated with a twin-screw extruder to obtain a polyamide high-flow conductive functional masterbatch, wherein the filler is added from the side feeding port of the twin-screw extruder.

[0028] Furthermore, the processing temperature of the twin-screw extruder is 190-230° C., the screw speed is 280-330 r / min, and the feeding speed is 10-15 Hz.

[0029] The beneficial effects of the present invention are:

[0030] The invention discloses a polyamide high-flow conductive functional masterbatch and a preparation method thereof. By using low-viscosity PA6 resin as a carrier resin and introducing a hyperbranched resin as a flow aid, the low viscosity and multi-cavity characteristics of the hyperbranched resin are utilized. The cavity not only serves as a containing cavity for conductive carbon black and a conductive auxiliary agent in the invention, but also the low viscosity of the hyperbranched resin and the low viscosity of the carrier resin give the obtained conductive masterbatch high flowability. Remarkably, the flow aid in the invention is a hyperbranched imine resin, the branched molecular chain has good compatibility with PA6, and the molecule contains a large amount of triphenylmethyl, which can well capture free radicals, hinder the oxidative damage of polymer materials, and thus improve the thermal stability of PA. At the same time, the low surface performance of the silicone oil molecular chain in the flow aid further improves its flowability, and gives the masterbatch a water-resistant function and an elasticity enhancement function.

[0031] Finally, the conductive masterbatch of the present invention realizes the conductive function by synergistically using the conductive auxiliary agent and the conductive carbon black;

[0032] In summary, the polyamide high-flow conductive functional masterbatch of the present invention has good flow properties, conductive function and water-resistant enhancement function, and can be directly added to the matrix resin according to the conductive requirements of the product without affecting the mechanical properties of the original resin. It can also improve the material's flowability, processing performance and surface gloss, improve product appearance and floating fiber phenomenon, and can be widely used in the field of conductive series plastic modification. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is the appearance effect of mixing the conductive functional masterbatch prepared in Example 1 with the reinforced polyamide material.

[0034] Figure 2 This is the appearance effect of mixing the conductive functional masterbatch prepared in Comparative Example 1 with the reinforced polyamide material. DETAILED DESCRIPTION

[0035] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0036] Example 1

[0037] Preparation of flow aid:

[0038] A1. After uniformly mixing 0.3 mol p-bromoformaldehyde, excess (3 mol) aniline and 0.15 mol aniline hydrochloride, the mixture was gradually heated to 90°C under nitrogen protection, and the mixture was reacted for 2 h. The mixture was then heated to 140°C and reacted for 2 h. The reaction was stopped, the mixture was cooled to 50-60°C, and the excess aniline was removed by vacuum distillation. Hydrochloric acid was added, the mixture was stirred, and the mixture was filtered. The filtrate was neutralized with NaOH, filtered, and the precipitate was repeatedly washed. The crude product was recrystallized with ethanol / water and dried to obtain a reactive diamine.

[0039] A2, 0.3 mol of the reactive diamine obtained in step A1, 10 g of the organotin catalyst T12 and 100 mL of anhydrous dioxane were mixed uniformly, heated to 100° C., and then 200 mL of anhydrous dioxane containing 0.1 mol of triphenylmethane triisocyanate was added. The mixture was stirred and reacted for 6 h, the reaction was stopped, and the anhydrous dioxane was recovered by vacuum rotary evaporation to obtain a reactive hyperbranched polymer;

[0040] A3. Evenly mix 100 g of the reactive hyperbranched polymer obtained in step A1 and 100 mL of dimethyl sulfoxide, add 3 g of potassium carbonate and 0.2 g of catalyst potassium iodide, heat to 100 ° C, slowly drop 10 g of terminal hydroxyl silicone oil, and after the dropwise addition is complete, continue the reaction for 10 hours, stop the reaction, recover the solvent by vacuum rotary evaporation, repeatedly wash with ethanol and water, and dry to obtain a flow aid, wherein the average molecular weight of the terminal hydroxyl silicone oil is 1000-2500.

[0041] Example 2

[0042] Preparation of flow aid:

[0043] A1. After uniformly mixing 0.3 mol p-bromoformaldehyde, excess (3 mol) aniline and 0.24 mol aniline hydrochloride, the mixture was gradually heated to 90-100° C. under nitrogen protection, and the reaction was continued to be heated to 130° C. for 2 h. The reaction was stopped, the mixture was cooled to 50-60° C., the excess aniline was removed by vacuum distillation, hydrochloric acid was added, the mixture was stirred, and the mixture was filtered. The filtrate was neutralized with NaOH, filtered, and the precipitate was repeatedly washed. The crude product was recrystallized with ethanol / water and dried to obtain a reactive diamine.

[0044] A2, 0.3 mol of the reactive diamine obtained in step A1, 10 g of the organotin catalyst T12 and 100 mL of anhydrous dioxane were mixed uniformly, heated to 100° C., and then 200 mL of anhydrous dioxane containing 0.18 mol of triphenylmethane triisocyanate was added. The mixture was stirred and reacted for 6 h, the reaction was stopped, and the anhydrous dioxane was recovered by vacuum rotary evaporation to obtain a reactive hyperbranched polymer;

[0045] A3. Evenly mix 100 g of the reactive hyperbranched polymer obtained in step A1 and 100 mL of dimethyl sulfoxide, add 6 g of potassium carbonate and 0.5 g of catalyst potassium iodide, heat to 110 ° C, slowly drop 25 g of terminal hydroxyl silicone oil, and after the dropwise addition is complete, continue the reaction for 10 hours, stop the reaction, recover the solvent by vacuum rotary evaporation, repeatedly wash with ethanol and water, and dry to obtain a flow aid, wherein the average molecular weight of the terminal hydroxyl silicone oil is 1000-2500.

[0046] Example 3

[0047] Preparation of conductive masterbatch:

[0048] The first step is to take materials according to the following mass percentages: 45.1% polyamide carrier resin, 16% filler, 29% conductive carbon black, 6.6% flow aid prepared in Example 1, 0.3% toner, 1% lubricant, and 2% conductive auxiliary agent;

[0049] The relative viscosity of the polyamide is 2.0, the filler is diatomaceous earth and organic bentonite mixed in a mass ratio of 1:1, and treated with a silane coupling agent KH-560, the conductive carbon black is a single-walled carbon nanotube with a particle size of 2-5um, and the color powder is phthalocyanine blue index PB15:3 and PB15:4 mixed in a mass ratio of 1:2-4, with a particle size of 0.05-0.1um and a specific surface area of ​​50-60m 2 / g, the lubricant is zinc stearate, and the conductive auxiliary agent is iron powder;

[0050] The second step is to extrude the above raw materials through a twin-screw extruder and granulate them to obtain polyamide high-flow conductive functional masterbatch, and add the filler from the side feeding port of the twin-screw extruder, wherein the processing temperature of the twin-screw extruder is 190-230°C, the screw speed is 300r / min, and the feeding speed is 10-15Hz.

[0051] Example 4

[0052] Preparation of conductive masterbatch:

[0053] The first step is to take materials according to the following mass percentages: 46.4% polyamide carrier resin, 15% filler, 31% conductive carbon black, 5.3% flow aid prepared in Example 1, 0.3% toner, 1% lubricant, and 1% conductive auxiliary agent;

[0054] The relative viscosity of the polyamide is 2.2, the filler is formed by mixing diatomaceous earth and organic bentonite in a mass ratio of 2:1 and treated with a silane coupling agent KH-560, the conductive carbon black is a single-walled carbon nanotube with a particle size of 6-10um, and the color powder is formed by mixing phthalocyanine blue index PB15:3 and PB15:4 in a mass ratio of 1:3, with a particle size of 0.10-0.2um and a specific surface area of ​​70-80m 2 / g, the lubricant is zinc stearate, and the conductive auxiliary agent is aluminum powder;

[0055] The second step is to extrude the above raw materials through a twin-screw extruder and granulate them to obtain polyamide high-flow conductive functional masterbatch, and add the filler from the side feeding port of the twin-screw extruder, wherein the processing temperature of the twin-screw extruder is 190-230°C, the screw speed is 330r / min, and the feeding speed is 10-15Hz.

[0056] Example 5

[0057] Preparation of conductive masterbatch:

[0058] The first step is to take materials according to the following mass percentages: 50.9% polyamide carrier resin, 15% filler, 30% conductive carbon black, 2% flow aid prepared in Example 1, 0.1% toner, 1% lubricant, and 1% conductive auxiliary;

[0059] The relative viscosity of the polyamide is 2.4, the filler is formed by mixing diatomaceous earth and organic bentonite in a mass ratio of 3:1 and treated with a silane coupling agent KH-560, the conductive carbon black is a single-walled carbon nanotube with a particle size of 6-8um, and the color powder is formed by mixing phthalocyanine blue index PB15:3 and PB15:4 in a mass ratio of 1:4, with a particle size of 0.10-0.2um and a specific surface area of ​​60-70m 2 / g, the lubricant is zinc stearate, and the conductive auxiliary agent is copper powder;

[0060] The second step is to extrude the above raw materials through a twin-screw extruder and granulate them to obtain polyamide high-flow conductive functional masterbatch, and add the filler from the side feeding port of the twin-screw extruder, wherein the processing temperature of the twin-screw extruder is 190-230°C, the screw speed is 320r / min, and the feeding speed is 10-15Hz.

[0061] Example 6

[0062] Preparation of conductive masterbatch:

[0063] The first step is to take materials according to the following mass percentages: 50% polyamide carrier resin, 13% filler, 30% conductive carbon black, 3.8% flow aid prepared in Example 1, 0.2% toner, 1% lubricant, and 2% conductive auxiliary agent;

[0064] The relative viscosity of the polyamide is 2.4, the filler is formed by mixing diatomaceous earth and organic bentonite in a mass ratio of 1:1 and treated with a silane coupling agent KH-560, the conductive carbon black is a single-walled carbon nanotube with a particle size of 2-10um, and the color powder is formed by mixing phthalocyanine blue index numbers PB15:3 and PB15:4 in a mass ratio of 1:4, with a particle size of 0.05-0.2um and a specific surface area of ​​50-80m 2 / g, the lubricant is zinc stearate, and the conductive auxiliary agent is a mixture of iron powder and aluminum powder in a ratio of 1:1;

[0065] The second step is to extrude the above raw materials through a twin-screw extruder and granulate them to obtain polyamide high-flow conductive functional masterbatch, and add the filler from the side feeding port of the twin-screw extruder, wherein the processing temperature of the twin-screw extruder is 190-230°C, the screw speed is 280r / min, and the feeding speed is 10-15Hz.

[0066] Example 7

[0067] Preparation of conductive masterbatch:

[0068] Step 1: Take materials according to the following mass percentages: 38.5% polyamide carrier resin, 16% filler, 37% conductive carbon black, 4% flow aid prepared in Example 1, 0.5% toner, 1% lubricant, and 3% conductive auxiliary agent;

[0069] The relative viscosity of the polyamide is 2.4, the filler is formed by mixing diatomaceous earth and organic bentonite in a mass ratio of 1:1 and treated with a silane coupling agent KH-560, the conductive carbon black is a single-walled carbon nanotube with a particle size of 2-10um, and the color powder is formed by mixing phthalocyanine blue index numbers PB15:3 and PB15:4 in a mass ratio of 1:3.5, with a particle size of 0.05-0.2um and a specific surface area of ​​50-80m 2 / g, the lubricant is zinc stearate, and the conductive auxiliary agent is a mixture of aluminum powder and copper powder in a mass ratio of 1:1;

[0070] The second step is to extrude the above raw materials through a twin-screw extruder and granulate them to obtain polyamide high-flow conductive functional masterbatch, and add the filler from the side feeding port of the twin-screw extruder, wherein the processing temperature of the twin-screw extruder is 190-230°C, the screw speed is 300r / min, and the feeding speed is 10-15Hz.

[0071] Example 8

[0072] Preparation of conductive masterbatch:

[0073] Step 1: Take materials according to the following mass percentages: 40.2% polyamide carrier resin, 14% filler, 36% conductive carbon black, 6.6% flow aid prepared in Example 1, 0.2% toner, 1% lubricant, and 2% conductive auxiliary agent;

[0074] The relative viscosity of the polyamide is 2.4, the filler is formed by mixing diatomaceous earth and organic bentonite in a mass ratio of 3:1 and treated with a silane coupling agent KH-560, the conductive carbon black is a single-walled carbon nanotube with a particle size of 2-10um, and the color powder is formed by mixing phthalocyanine blue index PB15:3 and PB15:4 in a mass ratio of 1:2, with a particle size of 0.05-0.2um and a specific surface area of ​​50-80m 2 / g, the lubricant is zinc stearate, and the conductive auxiliary agent is a mixture of iron powder and copper powder in a mass ratio of 1:1;

[0075] The second step is to extrude the above raw materials through a twin-screw extruder and granulate them to obtain polyamide high-flow conductive functional masterbatch, and add the filler from the side feeding port of the twin-screw extruder, wherein the processing temperature of the twin-screw extruder is 190-230°C, the screw speed is 330r / min, and the feeding speed is 10-15Hz.

[0076] Comparative Example 1

[0077] Preparation of conductive masterbatch: Compared with Example 3, an equal amount of the flow aid in the raw material is replaced with a polyamide carrier resin, and the rest is the same.

[0078] Comparative Example 2

[0079] Preparation of conductive masterbatch: Compared with Example 3, an equal amount of the conductive agent in the raw material is replaced with ordinary black sand, and the rest is the same.

[0080] Comparative Example 3

[0081] Preparation of conductive masterbatch: Compared with Example 3, an equal amount of the conductive auxiliary agent in the raw material is replaced with a carrier resin, and the rest is the same.

[0082] Comparative Example 4

[0083] Preparation of conductive masterbatch: Compared with Example 3, the flow aid in the raw material is replaced with an equal amount of the reactive hyperbranched resin prepared in step A2 of Example 1, and the rest is the same.

[0084] Comparative Example 5

[0085] Preparation of conductive masterbatch: Compared with Example 3, the flow aid in the raw material is replaced with an equal amount of the terminal hydroxyl silicone oil used in step A3 of Example 1, and the rest is the same.

[0086] The conductive functional masterbatch prepared in Examples 1-6 and Comparative Examples 1-5 was mixed evenly with the polyamide material at a ratio of 1:20 to make standard test specimens, and the corresponding mechanical property tests were performed. The test results are shown in Table 1, wherein the heat aging test is the tensile strength retention rate;

[0087] Table 1

[0088]

[0089]

[0090] It can be seen from Table 1 that the polyamide high-flow conductive functional masterbatch of the present application can be directly added to the base resin to improve the conductive properties of the original resin and reduce the water absorption of the original resin.

[0091] The raw materials in the first step of Example 3 and Comparative Example 1 were stirred and mixed in a high-speed mixer, and then allowed to stand to observe their appearance. The appearance diagram is as follows: Figure 1 and Figure 2 As shown, from Figure 1 and Figure 2 It can be seen that Figure 1 The surface of the mixture is smooth, and no obvious floating fibers are found. Figure 2 Floating fibers appear on the surface of the mixture.

[0092] In summary, the combined use of conductive carbon black and conductive auxiliary agent in the present invention can significantly improve the conductive properties of polyamide materials; hyperbranched resin polymer can improve the fluidity, processing properties and surface gloss of the material, and the appearance and surface floating fiber effect of the product are excellent.

[0093] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0094] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A polyamide high flow conductive functional masterbatch, characterized in that , including the following raw materials by mass percentage: Polyamide carrier resin 34.5%-58.1%, filler 10%-20%, conductive carbon black 22%-37%, flow aid 2%-8%, color powder 0.1%-0.5%, lubricant 0.5%-1.5%, conductive auxiliary agent 1%-3%; The flow aid is formed by reacting a reactive hyperbranched polymer formed by a hyperbranching reaction of a reactive diamine and triphenylmethane triisocyanate with a terminal hydroxyl silicone oil; The molecular structural formula of the reactive diamine is shown below: The reaction of the reactive hyperbranched polymer and the hydroxyl-terminated silicone oil comprises: The reactive hyperbranched polymer and dimethyl sulfoxide are mixed evenly, and potassium carbonate and catalyst potassium iodide are added, and the mixture is heated to 100-110° C., and the terminal hydroxyl silicone oil is slowly added dropwise. After the addition is complete, the reaction is continued for 8-10 hours, and the reaction is stopped. After post-treatment, a flow aid is obtained; The conductive auxiliary agent is metal powder, and the metal powder is one or more of iron powder, aluminum powder, and copper powder.

2. A polyamide high flow conductive functional masterbatch according to claim 1, characterized in that , the relative viscosity of the polyamide carrier resin is 2.0-2.

4.

3. The polyamide high flow conductive functional masterbatch according to claim 1, characterized in that , the average molecular weight of the flow aid is 15000-25000.

4. The polyamide high flow conductive functional masterbatch according to claim 1, characterized in that , the average molecular weight of the terminal hydroxyl silicone oil is 1000-2500.

5. The polyamide high flow conductive functional masterbatch according to claim 1, characterized in that The mass ratio of the reactive hyperbranched polymer, the terminal hydroxyl silicone oil, potassium carbonate and potassium iodide is 100:10-25:2-6:0.2-0.

5.

6. The polyamide high flow conductive functional masterbatch according to claim 1, characterized in that , the hyperbranching reaction comprises: The reactive diamine, the organotin catalyst T12 and anhydrous dioxane are mixed evenly, heated to 90-100° C., and then anhydrous dioxane containing triphenylmethane triisocyanate is slowly added dropwise. After post-treatment, the anhydrous dioxane is recovered by vacuum rotary evaporation to obtain a reactive hyperbranched polymer.

7. The polyamide high flow conductive functional masterbatch according to claim 6, characterized in that , the molar ratio of the reactive diamine to triphenylmethane triisocyanate is 3:1-1.

8.

8. The polyamide high flow conductive functional masterbatch according to claim 1, characterized in that The filler is a mixture of at least two of diatomaceous earth, wollastonite, organic bentonite, and nano-montmorillonite in any ratio; the conductive carbon black is one or more of Ketjen black, graphene, and single-walled carbon nanotubes.

9. The method for preparing a polyamide high-flow conductive functional masterbatch according to claim 1, characterized in that: include: The following raw materials are taken in percentage by mass: 34.5%-58.1% of polyamide carrier resin, 10%-20% of filler, 22%-37% of conductive carbon black, 2%-8% of flow aid, 0.1%-0.5% of color powder, 0.5%-1.5% of lubricant, 1%-3% of conductive auxiliary agent, and extruded and granulated with a twin-screw extruder to obtain a polyamide high-flow conductive functional masterbatch.

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