Preparation method of antistatic degradable plastic master batch
By preparing the interlaced structure of modified polyether ester amide and modified antistatic agent, the electrostatic and environmental pollution problems of plastic products are solved, and the long-term antistatic and degradable effects are achieved.
Patent Information
- Application Number
- CN202510521744.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2025-07-04
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing plastic products have electrostatic problems and environmental pollution problems. Traditional antistatic plastics are not lasting and have poor mechanical properties of degradable plastics, making them difficult to apply on a large scale.
Modified polyetherester amides are prepared by participating in the polymerization reaction of coumarin and N-(3-hydroxypropyl)ethylenediamine, and melt-kneaded with the modified antistatic agent to form a network structure with soft and hard segment interlaced. Combined with the modified antistatic agent to form a cross-linked network structure, improving the mechanical properties and antistatic effect of the plastic masterbatch.
It achieves long-term anti-static effect and degradability, improves the mechanical strength and wear resistance of plastic masterbatches, and solves the problems of static electricity and environmental pollution.
Smart Images
Figure BDA0005374173060000071
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of degradable plastics, and specifically to a preparation method of an antistatic degradable plastic masterbatch. Background Art
[0002] With the rapid development of modern industry and social life, plastic products have been widely used in various fields. However, there are two problems to be solved in the use of plastics: one is the static electricity problem, and the other is the environmental problem. In many industrial production scenarios, such as electronic and electrical manufacturing, precision instrument processing, chemical production, etc., plastic products are extremely prone to generate static electricity due to reasons such as friction. The generation of static electricity will not only adsorb tiny particles such as dust and impurities, affecting the appearance and quality of products, especially in environments with extremely high cleanliness requirements such as electronic chip manufacturing, static electricity adsorption may cause serious failures such as chip short circuits. In flammable and explosive environments, static electricity discharge may even trigger major safety accidents such as fires and explosions. To solve the static electricity problem, the traditional method is to add antistatic agents to plastic products, but the existing antistatic plastics still have deficiencies in the persistence and stability of the antistatic effect, and some antistatic agents may have negative impacts on other properties of plastics.
[0003] On the other hand, from the perspective of environmental protection, a large number of used plastic products are difficult to degrade and accumulate in the natural environment for a long time, forming serious white pollution. These plastic products take decades or even hundreds of years to decompose, causing great damage to the soil, water bodies, ecosystems, etc. Although there are some degradable plastics on the market at present, they generally have problems such as poor mechanical properties, high cost, and harsh degradation conditions, which limit their large-scale application. At the same time, in the process of developing degradable plastics, how to balance antistatic and high-strength properties has become a new challenge. Summary of the Invention
[0004] The purpose of the present invention is to provide a preparation method of an antistatic degradable plastic masterbatch to solve the problems existing in the prior art.
[0005] To solve the above technical problems, the present invention provides the following technical solution: A preparation method of an antistatic degradable plastic masterbatch, including the following preparation steps:
[0006] (1) Under a nitrogen atmosphere, add 0.25 parts of pre-emulsion to 25 parts of potassium persulfate aqueous solution, adjust the rotation speed to 300 rpm, react at 50 - 60 °C for 2 - 4 h, then add 0.75 parts of pre-emulsion and 75 parts of potassium persulfate aqueous solution, raise the temperature to 70 - 80 °C, react for 3 - 5 h, then cool down to 30 - 40 °C, adjust the pH value of the solution to 7 - 8 with 2 mol / L ammonia water, filter to obtain the solid, wash it 3 times with deionized water, and dry it in an oven at 40 - 50 °C for 10 - 16 h to obtain the modified antistatic agent;
[0007] (2) Under a nitrogen atmosphere, 15 - 23 parts of coumarin, 2 - 4 parts of potassium hydroxide, 8 - 14 parts of N-(3-hydroxypropyl)ethylenediamine, 1 - 3 parts of tetrabutyl titanate, and 18 - 30 parts of ethylene glycol are mixed evenly, heated to 150 - 160 °C, 24 - 38 parts of ethylene oxide are added, and the reaction is carried out for 1 - 3 h under stirring at 100 rpm. Subsequently, the temperature is raised again and the pressure is reduced, and the reaction is continued for 2 - 4 h. The solid is collected, washed 3 times with deionized water, and dried in an oven at 40 - 50 °C for 10 - 16 h to obtain the modified polyether ester amide;
[0008] (3) Under a nitrogen atmosphere, 63 - 87 parts of the modified polyether ester amide and 45 - 63 parts of the modified antistatic agent are mixed in a mixer at 250 - 270 °C for 1 - 3 h, 0.4 - 0.8 parts of antioxidant and 1 - 3 parts of plasticizer are added, and the mixing is continued for 10 - 30 min. Then, it is extruded through an extruder and pelletized to obtain the antistatic degradable plastic masterbatch.
[0009] Further, the preparation steps of the pre-emulsion in step (1) are as follows: 11 - 23 parts of methacryloyl isocyanate, 8 - 18 parts of dimethyldiallylammonium chloride, 10 - 20 parts of allyl acrylate, 24 - 50 parts of emulsifier, 28 - 58 parts of deionized water, and 3 - 7 parts of sodium bicarbonate are sequentially added to a container and emulsified at high speed for 20 - 30 min to obtain the pre-emulsion.
[0010] Further, the emulsifier is prepared by compounding cetyltrimethylammonium bromide and polyoxyethylene lauryl phenol ether in a mass ratio of 1:1.
[0011] Further, the rotation speed of the high-speed emulsification is 3500 r / min.
[0012] Further, the content of potassium persulfate in the potassium persulfate aqueous solution in step (1) is 10 wt%.
[0013] Further, the temperature after heating in step (2) is 235 - 245 °C.
[0014] Further, the pressure reduction in step (2) is to reduce the pressure to 550 - 650 Pa.
[0015] Further, the antioxidant in step (3) is any one of AO-60, DSTDP, BHA, and TPP.
[0016] Further, the plasticizer in step (3) is any one of dibutyl phthalate, dioctyl adipate, and di-n-butyl sebacate.
[0017] Further, the parameters of the extruder in step (3) are as follows: the head temperature is 200-220 °C, the screw speed is 180-210 r / min, the extrusion pressure is 10-18 MPa, and the shear rate is 180-230 s -1 .
[0018] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:
[0019] In the present invention, a modified polyether ester amide is prepared by the polymerization reaction of coumarin and N-(3-hydroxypropyl)ethylenediamine with polyethylene glycol. The ester group of coumarin is easily degraded by bacteria or enzymes, improving the degradability. At the same time, the introduction of phenyl groups improves the thermal stability of the plastic masterbatch, thereby enhancing the heat resistance effect and indirectly improving the mechanical properties. On this basis, the presence of primary amines in N-(3-hydroxypropyl)ethylenediamine enables the plastic masterbatch to form a conductive film on the surface of the object, which can effectively adsorb and disperse static charges, thus eliminating static electricity and achieving an antistatic effect. Finally, the modified polyether ester amide and the modified antistatic agent are melt-blended. Its hydroxyl groups can combine with the isocyanate in the modified antistatic agent at high temperature to form a cross-linked network structure of soft and hard segments. The polyester of the soft segment contains more polar ester bonds, which can improve the mechanical strength and wear resistance of the plastic masterbatch. At the same time, the polyether of the hard segment has good flexibility, further improving the mechanical strength of the plastic masterbatch.
[0020] Among them, the modified antistatic agent is prepared by seed pre-emulsification semi-continuous emulsion polymerization of methacryloyl isocyanate, dimethyldiallylammonium chloride, and allyl acrylate, forming a cross-linked network structure with good elasticity and wear resistance, not easily deformed and broken, improving the mechanical properties of the plastic masterbatch; the introduction of isocyanate groups by methacryloyl isocyanate provides active sites for subsequent melt blending and forms amide bonds, improving the solubility of the plastic masterbatch, thereby enhancing the hydrolysis property and further enhancing the degradability effect; dimethyldiallylammonium chloride forms a continuous network and is evenly distributed in the plastic masterbatch. The carried cations can tightly bind to the plastic masterbatch and continuously adsorb charges, achieving a long-lasting antistatic effect. Specific embodiments
[0021] The following will combine 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 a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.
[0022] In order to more clearly illustrate the method provided by the present invention, the following examples are used for detailed description. The test methods for each index of the antistatic and degradable plastic masterbatch prepared in the following examples are as follows:
[0023] Tensile strength and elongation at break: Plastic particles from the examples and comparative examples were made into 0.3 mm thick films for tensile strength testing, which was carried out with reference to GB / T 13022.
[0024] Surface resistance: Plastic blocks of 100 mm×100 mm×3 mm were made from the same weight of the examples and comparative examples, and the test was carried out with reference to GB / T 1410.
[0025] Biodegradation rate: Plastic particles from the examples and comparative examples were made into 0.3 mm thick films, and the test was carried out with reference to ISO 14855-1.
[0026] Example 1: (1) 11 parts of methacryloyl isocyanate, 8 parts of dimethyldiallylammonium chloride, 10 parts of allyl acrylate, 24 parts of emulsifier, 28 parts of deionized water, and 3 parts of sodium bicarbonate were successively added to a container and emulsified at a high speed of 3500 r / min for 20 min to obtain a pre-emulsion; the emulsifier was prepared by compounding cetyltrimethylammonium bromide and polyoxyethylene lauryl phenol ether at a mass ratio of 1:1;
[0027] (2) Under a nitrogen atmosphere, 0.25 part of the pre-emulsion was added to an aqueous solution of potassium persulfate with a content of 10 wt% of 25 parts of potassium persulfate, the rotation speed was adjusted to 300 rpm, after reacting at 50 °C for 2 h, 0.75 part of the pre-emulsion and an aqueous solution of potassium persulfate with a content of 10 wt% of 75 parts of potassium persulfate were added, the temperature was raised to 70 °C, and the reaction was carried out for 3 h. Subsequently, the temperature was lowered to 30 °C, the pH value of the solution was adjusted to 7 with 2 mol / L ammonia water, the solid was filtered, washed 3 times with deionized water, and dried in an oven at 40 °C for 10 h to obtain a modified antistatic agent;
[0028] (3) Under a nitrogen atmosphere, 15 parts of coumarin, 2 parts of potassium hydroxide, 8 parts of N-(3-hydroxypropyl)ethylenediamine, 1 part of tetrabutyl titanate, and 18 parts of ethylene glycol were mixed evenly, the temperature was raised to 150 °C, 24 parts of ethylene oxide were added, and the reaction was carried out for 1 h under stirring at 100 rpm. Subsequently, the temperature was raised to 235 °C again and the pressure was reduced to 550 Pa, and the reaction was continued for 2 h. The solid was collected, washed 3 times with deionized water, and dried in an oven at 40 °C for 10 h to obtain a modified polyether ester amide;
[0029] (4) Under a nitrogen atmosphere, 63 parts of the modified polyether ester amide and 45 parts of the modified antistatic agent were mixed in a mixer at 250 °C for 1 h, 0.4 part of AO-60 antioxidant and 1 part of dibutyl phthalate were added, and the mixture was continuously mixed for 10 min, then extruded through an extruder and pelletized. The head temperature was 200 °C, the screw rotation speed was 180 r / min, the extrusion pressure was 10 MPa, and the shear rate was 180 s -1 , to obtain an antistatic and degradable plastic masterbatch.
[0030] Example 2: (1) 17 parts of methacryloyl isocyanate, 13 parts of dimethyldiallylammonium chloride, 15 parts of allyl acrylate, 37 parts of emulsifier, 43 parts of deionized water, and 5 parts of sodium bicarbonate were sequentially added to a container and emulsified at a high speed of 3500 r / min for 25 min to obtain a pre-emulsion; the emulsifier was prepared by compounding cetyltrimethylammonium bromide and polyoxyethylene lauryl phenol ether in a mass ratio of 1:1;
[0031] (2) Under a nitrogen atmosphere, 0.25 part of the pre-emulsion was added to an aqueous potassium persulfate solution containing 10 wt% of 25 parts of potassium persulfate, the rotation speed was adjusted to 300 rpm, and after reacting at 55 °C for 3 h, 0.75 part of the pre-emulsion and an aqueous potassium persulfate solution containing 10 wt% of 75 parts of potassium persulfate were added, the temperature was raised to 75 °C, and the reaction was carried out for 4 h. Subsequently, the temperature was lowered to 35 °C, the pH value of the solution was adjusted to 7.5 with 2 mol / L ammonia water, the solid was filtered, washed 3 times with deionized water, and dried in an oven at 45 °C for 13 h to obtain a modified antistatic agent;
[0032] (3) Under a nitrogen atmosphere, 19 parts of coumarin, 3 parts of potassium hydroxide, 11 parts of N-(3-hydroxypropyl)ethylenediamine, 2 parts of tetrabutyl titanate, and 24 parts of ethylene glycol were mixed evenly, the temperature was raised to 155 °C, 31 parts of ethylene oxide were added, and the reaction was carried out for 2 h under stirring at 100 rpm. Subsequently, the temperature was raised to 240 °C again and the pressure was reduced to 600 Pa, and the reaction was continued for 3 h. The solid was collected, washed 3 times with deionized water, and dried in an oven at 45 °C for 13 h to obtain a modified polyether ester amide;
[0033] (4) Under a nitrogen atmosphere, 75 parts of the modified polyether ester amide and 54 parts of the modified antistatic agent were mixed in a mixer at 260 °C for 2 h, 0.6 part of DSTDP antioxidant and 2 parts of dioctyl adipate were added, and the mixture was continuously mixed for 20 min, and then extruded through an extruder and pelletized. The temperature of the feed head was 210 °C, the screw speed was 195 r / min, the extrusion pressure was 14 MPa, and the shear rate was 205 s -1 , to obtain an antistatic and degradable plastic masterbatch.
[0034] Example 3: (1) 23 parts of methacryloyl isocyanate, 18 parts of dimethyldiallylammonium chloride, 20 parts of allyl acrylate, 50 parts of emulsifier, 58 parts of deionized water, and 7 parts of sodium bicarbonate were sequentially added to a container and emulsified at a high speed of 3500 r / min for 30 min to obtain a pre-emulsion; the emulsifier was prepared by compounding cetyltrimethylammonium bromide and polyoxyethylene lauryl phenol ether in a mass ratio of 1:1;
[0035] (2) Under a nitrogen atmosphere, 0.25 parts of the pre-emulsion was added to an aqueous potassium persulfate solution containing 10 wt% of 25 parts of potassium persulfate. The rotation speed was adjusted to 300 rpm. After reacting at 60 °C for 4 h, 0.75 parts of the pre-emulsion and an aqueous potassium persulfate solution containing 10 wt% of 75 parts of potassium persulfate were added. The temperature was raised to 80 °C and reacted for 5 h. Subsequently, the temperature was lowered to 40 °C, and the pH value of the solution was adjusted to 8 with 2 mol / L ammonia water. The solid was collected by filtration, washed 3 times with deionized water, and dried in an oven at 50 °C for 16 h to obtain the modified antistatic agent;
[0036] (3) Under a nitrogen atmosphere, 23 parts of coumarin, 4 parts of potassium hydroxide, 14 parts of N-(3-hydroxypropyl)ethylenediamine, 3 parts of tetrabutyl titanate, and 30 parts of ethylene glycol were mixed evenly. The temperature was raised to 160 °C, 38 parts of ethylene oxide were added, and the reaction was carried out for 3 h under stirring at 100 rpm. Subsequently, the temperature was raised to 245 °C again and the pressure was reduced to 650 Pa, and the reaction was continued for 4 h. The solid was collected, washed 3 times with deionized water, and dried in an oven at 50 °C for 16 h to obtain the modified polyether ester amide;
[0037] (4) Under a nitrogen atmosphere, 87 parts of the modified polyether ester amide and 63 parts of the modified antistatic agent were mixed in an internal mixer at 270 °C for 3 h. 0.8 parts of TPP antioxidant and 3 parts of dibutyl sebacate were added, and the mixture was continuously mixed for 30 min. It was extruded by an extruder and pelletized. The head temperature was 220 °C, the screw rotation speed was 210 r / min, the extrusion pressure was 18 MPa, and the shear rate was 230 s -1 , to obtain the antistatic degradable plastic masterbatch.
[0038] Comparative Example 1: The difference between Comparative Example 1 and Example 2 lies in step (1). Step (1) was changed to: 13 parts of dimethyldiallylammonium chloride, 15 parts of allyl acrylate, 37 parts of emulsifier, 43 parts of deionized water, and 5 parts of sodium bicarbonate were successively added to a container and emulsified at a high speed of 3500 r / min for 25 min to obtain a pre-emulsion; the emulsifier was prepared by mixing cetyltrimethylammonium bromide and polyoxyethylene lauryl phenyl ether in a mass ratio of 1:1. The remaining steps were the same as in Example 2.
[0039] Comparative Example 2: The difference between Comparative Example 2 and Example 2 lies in step (1). Step (1) was changed to: 17 parts of methacryloyl isocyanate, 15 parts of allyl acrylate, 37 parts of emulsifier, 43 parts of deionized water, and 5 parts of sodium bicarbonate were successively added to a container and emulsified at a high speed of 3500 r / min for 25 min to obtain a pre-emulsion; the emulsifier was prepared by mixing cetyltrimethylammonium bromide and polyoxyethylene lauryl phenyl ether in a mass ratio of 1:1. The remaining steps were the same as in Example 2.
[0040] Comparative Example 3: The difference between Comparative Example 3 and Example 2 lies in step (1). Step (1) is modified as follows: 17 parts of methacryloyl isocyanate, 13 parts of dimethyldiallylammonium chloride, 37 parts of emulsifier, 43 parts of deionized water, and 5 parts of sodium bicarbonate are sequentially added to a container and emulsified at a high speed of 3500 r / min for 25 min to obtain a pre-emulsion; the emulsifier is prepared by compounding cetyltrimethylammonium bromide and polyoxyethylene lauryl phenol ether in a mass ratio of 1:1. The remaining steps are the same as those in Example 2.
[0041] Comparative Example 4: The difference between Comparative Example 4 and Example 2 lies in step (3). Step (3) is modified as follows: Under a nitrogen atmosphere, 3 parts of potassium hydroxide, 11 parts of N-(3-hydroxypropyl)ethylenediamine, 2 parts of tetrabutyl titanate, and 24 parts of ethylene glycol are mixed evenly, heated to 155 °C, 31 parts of ethylene oxide are added, and the reaction is carried out under stirring at 100 rpm for 2 h. Subsequently, the temperature is raised to 240 °C again and the pressure is reduced to 600 Pa, and the reaction is continued for 3 h. The solid is collected, washed 3 times with deionized water, and dried in an oven at 45 °C for 13 h to obtain a modified polyether ester amide. The remaining steps are the same as those in Example 2.
[0042] Comparative Example 5: The difference between Comparative Example 5 and Example 2 lies in step (3). Step (3) is modified as follows: Under a nitrogen atmosphere, 19 parts of coumarin, 3 parts of potassium hydroxide, 2 parts of tetrabutyl titanate, and 24 parts of ethylene glycol are mixed evenly, heated to 155 °C, 31 parts of ethylene oxide are added, and the reaction is carried out under stirring at 100 rpm for 2 h. Subsequently, the temperature is raised to 240 °C again and the pressure is reduced to 600 Pa, and the reaction is continued for 3 h. The solid is collected, washed 3 times with deionized water, and dried in an oven at 45 °C for 13 h to obtain a modified polyether ester amide. The remaining steps are the same as those in Example 2.
[0043] Comparative Example 6: The difference between Comparative Example 6 and Example 2 lies in step (4). Step (4) is modified as follows: Under a nitrogen atmosphere, 75 parts of modified polyether ester amide, 54 parts of modified antistatic agent, 0.6 part of DSTDP antioxidant, and 2 parts of dioctyl adipate are mixed in a mixer at 260 °C for 20 min, extruded through an extruder, and pelletized, where the head temperature is 210 °C, the screw speed is 195 r / min, the extrusion pressure is 14 MPa, and the shear rate is 205 s -1 , to obtain an antistatic and degradable plastic masterbatch. The remaining steps are the same as those in Example 2.
[0044] Effect Example
[0045] The following Table 1 gives the performance analysis results of the antistatic and degradable plastic masterbatches of Examples 1 to 3 and Comparative Examples 1 to 6 of the present invention.
[0046] Table 1
[0047]
[0048] From the comparison of the experimental data of Examples 1, 2, 3 and Comparative Example 1, it can be found that isocyanatoethyl methacrylate introduced isocyanate groups, provided active sites for subsequent melt blending, and formed amide bonds, which improved the solubility of the plastic masterbatch, enhanced the hydrolysis property, and further enhanced the biodegradation effect; from the comparison of the experimental data of Examples 1, 2, 3 and Comparative Example 2, it can be found that dimethyldiallylammonium chloride formed a continuous network and was evenly distributed in the plastic masterbatch. The carried cations could tightly bind to the plastic masterbatch and continuously adsorb charges to achieve a long-term antistatic effect; from the comparison of the experimental data of Examples 1, 2, 3 and Comparative Example 3, it can be found that the addition of allyl acrylate made the plastic masterbatch form a cross-linked network structure, which had good elasticity and wear resistance, was not easy to deform and break, and improved the mechanical properties; from the comparison of the experimental data of Examples 1, 2, 3 and Comparative Example 4, it can be found that the ester group of coumarin was easily degraded by bacteria or enzymes, improving the biodegradability. At the same time, the introduction of phenyl improved the thermal stability of the plastic masterbatch, thus improving the heat resistance effect and indirectly improving the mechanical properties; from the comparison of the experimental data of Examples 1, 2, 3 and Comparative Example 5, it can be found that the presence of primary amine in N-(3-hydroxypropyl)ethylenediamine could form a conductive film on the surface of the object by the plastic masterbatch, which could effectively adsorb and disperse static charges, eliminate the static electricity phenomenon, and achieve the antistatic effect; from the comparison of the experimental data of Examples 1, 2, 3 and Comparative Example 6, it can be found that when the modified polyether ester amide was melt-kneaded with the modified antistatic agent, its hydroxyl group could combine with the isocyanate in the modified antistatic agent at high temperature to form a network structure with alternating hard and soft segments. The polyester of the soft segment contained more polar ester bonds, which could improve the mechanical strength and wear resistance of the plastic masterbatch. At the same time, the polyether of the hard segment had good flexibility, further improving the mechanical strength of the plastic masterbatch.
[0049] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claim.
Claims
1. A preparation method of an antistatic degradable plastic masterbatch, characterized in that, It includes the following preparation steps: (1) Under a nitrogen atmosphere, add 0.25 part of pre-emulsion to 25 parts of aqueous potassium persulfate solution, adjust the rotation speed to 300 rpm, react at 50 - 60 °C for 2 - 4 h, then add 0.75 part of pre-emulsion and 75 parts of aqueous potassium persulfate solution, raise the temperature to 70 - 80 °C, react for 3 - 5 h, then cool down to 30 - 40 °C, adjust the pH value of the solution to 7 - 8 with 2 mol / L ammonia water, filter to obtain the solid, wash it 3 times with deionized water, and dry it in an oven at 40 - 50 °C for 10 - 16 h to obtain the modified antistatic agent; (2) Under a nitrogen atmosphere, mix 15 - 23 parts of coumarin, 2 - 4 parts of potassium hydroxide, 8 - 14 parts of N-(3-hydroxypropyl)ethylenediamine, 1 - 3 parts of tetrabutyl titanate, and 18 - 30 parts of ethylene glycol evenly, raise the temperature to 150 - 160 °C, add 24 - 38 parts of ethylene oxide, react under stirring at 100 rpm for 1 - 3 h, then raise the temperature again and reduce the pressure, continue to react for 2 - 4 h, collect the solid, wash it 3 times with deionized water, and dry it in an oven at 40 - 50 °C for 10 - 16 h to obtain the modified polyether ester amide; (3) Under a nitrogen atmosphere, mix 63 - 87 parts of modified polyether ester amide and 45 - 63 parts of modified antistatic agent in a mixer at 250 - 270 °C for 1 - 3 h, add 0.4 - 0.8 part of antioxidant and 1 - 3 parts of plasticizer, continue to mix for 10 - 30 min, extrude through an extruder, and pelletize to obtain the antistatic degradable plastic masterbatch.
2. The preparation method of an antistatic and degradable plastic masterbatch according to claim 1, characterized in that, The preparation steps of the pre-emulsion in step (1) are as follows: successively add 11 - 23 parts of methacryloyl isocyanate, 8 - 18 parts of dimethyldiallylammonium chloride, 10 - 20 parts of allyl acrylate, 24 - 50 parts of emulsifier, 28 - 58 parts of deionized water, and 3 - 7 parts of sodium bicarbonate into a container, and emulsify at high speed for 20 - 30 min to obtain the pre-emulsion.
3. The preparation method of an antistatic and degradable plastic masterbatch according to claim 2, characterized in that, The emulsifier is prepared by compounding cetyltrimethylammonium bromide and polyoxyethylene lauryl phenol ether in a mass ratio of 1:
1.
4. The preparation method of an antistatic and degradable plastic masterbatch according to claim 2, characterized in that, The rotation speed of the high-speed emulsification is 3500 r / min.
5. The preparation method of an antistatic and degradable plastic masterbatch according to claim 1, characterized in that, The content of potassium persulfate in the aqueous potassium persulfate solution in step (1) is 10 wt%.
6. The preparation method of an antistatic and degradable plastic masterbatch according to claim 1, characterized in that, The temperature after heating in step (2) is 235 - 245 °C.
7. The preparation method of an antistatic and degradable plastic masterbatch according to claim 1, characterized in that, The pressure reduction in step (2) is to reduce the pressure to 550 - 650 Pa.
8. The preparation method of an antistatic and degradable plastic masterbatch according to claim 1, characterized in that, The antioxidant in step (3) is any one of AO-60, DSTDP, BHA, and TPP.
9. The preparation method of an antistatic and degradable plastic masterbatch according to claim 1, characterized in that, The plasticizer in step (3) is any one of dibutyl phthalate, dioctyl adipate, and dibutyl sebacate.
10. The preparation method of an antistatic and degradable plastic masterbatch according to claim 1, characterized in that, The parameters of the extruder in step (3) are as follows: the head temperature is 200 - 220 °C, the screw speed is 180 - 210 r / min, the extrusion pressure is 10 - 18 MPa, and the shear rate is 180 - 230 s -1 .