A Renewable Marine Plastic Material PA66 and Its Preparation Method

Abstract

The present invention relates to a renewable marine plastic material PA66 and a preparation method thereof, belonging to the technical field of polymer materials. It comprises, by weight: 100 parts of modified nylon resin, 1.8 - 2.4 parts of zinc powder, 8 - 11 parts of toughening agent, 0.08 - 0.1 part of antioxidant and 1.2 - 1.5 parts of lubricant; the modified nylon resin is prepared by amine-ester exchange of diallylamine and dimethyl 3,3'-dithiodipropionate to form an intermediate, and then mercaptoacetic acid is subjected to click addition with the double bond in the intermediate to form a modified monomer, and then copolymerized with adipic acid and hexamethylenediamine; the modified monomer introduces low bond energy disulfide bonds into the polymer chain, and the sulfur-nitrogen structure in its structure forms a chelating effect, captures zinc powder particles during the blending process, promotes the cleavage of disulfide bonds in situ and efficiently, effectively reduces the melting point of nylon 66, realizes the low-energy regeneration of nylon 66 materials, and realizes the recycling of marine stranded nylon materials.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer materials, and specifically relates to a renewable marine plastic material PA66 and a preparation method thereof. Background Art

[0002] Marine waste plastics can be divided into stranded marine waste plastics, floating marine waste plastics and submerged marine waste plastics. Marine waste plastics and the microplastics formed by them have irreversible harm to the health of marine organisms and humans. So far, it is known that more than 1,500 species are affected by marine litter.

[0003] Among marine waste plastics, the component of stranded marine waste plastics is the highest, reaching more than 90% of marine waste plastics in terms of quantity; in terms of composition, the components of stranded marine waste plastics include PA (nylon), PP (polypropylene), PE (polyethylene), etc. Among them, nylon occupies a relatively high proportion. The recycling of nylon materials is an important way to solve marine plastics. In the prior art, the recycling method for nylon materials is mainly thermal recovery. However, the melting point of nylon materials is relatively high, and the energy consumption for melt recycling is high, resulting in high recycling costs of nylon materials, which seriously restricts the promotion of the nylon marine plastic recycling industry. Summary of the Invention

[0004] In order to solve the technical problems mentioned in the background art, the purpose of the present invention is to provide a renewable marine plastic material PA66 and a preparation method thereof.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A renewable marine plastic material PA66, comprising by weight:

[0007] 100 parts of modified nylon resin, 1.8 - 2.4 parts of zinc powder, 8 - 11 parts of toughening agent, 0.08 - 0.1 part of antioxidant and 1.2 - 1.5 parts of lubricant;

[0008] The modified nylon resin is prepared by the following method:

[0009] Step A1: Charge and mix dimethyl 3,3'-dithiodipropionate, diallylamine, trimethylaluminum and anhydrous tetrahydrofuran, introduce nitrogen protection, heat up to 60 - 70 °C, apply stirring at 120 - 180 rpm, reflux and react for 2.5 - 3.5 h. After the reaction, rotary evaporate to remove tetrahydrofuran, then wash with water and dry under vacuum to obtain an intermediate;

[0010] Further, the dosage ratio of dimethyl 3,3'-dithiobispropionate, diallylamine, trimethylaluminum, and anhydrous tetrahydrofuran is 0.1 mol: 0.205 - 0.21 mol: 30 - 45 mg: 50 - 60 mL. Under the catalysis of trimethylaluminum, diallylamine and dimethyl 3,3'-dithiobispropionate perform amine-ester exchange. The specific reaction route can be represented as follows:

[0011]

[0012] Step A2: Charge and mix the intermediate, mercaptoacetic acid, dimethylphenylphosphine, and toluene, introduce nitrogen for protection, heat up to 45 - 55 °C, apply stirring at 90 - 120 rpm and ultraviolet irradiation at 150 - 200 W / m 2 for 3 - 4 h. After the reaction, remove toluene by rotary evaporation under reduced pressure to obtain the modified monomer;

[0013] Further, the dosage ratio of the intermediate, mercaptoacetic acid, dimethylphenylphosphine, and toluene is 0.1 mol: 0.4 mol: 20 - 30 mg: 120 - 150 mL. Under the catalysis of dimethylphenylphosphine and the initiation of ultraviolet irradiation, mercaptoacetic acid undergoes click addition with the double bond in the intermediate. The specific reaction route can be represented as follows:

[0014]

[0015] Step A3: Dissolve adipic acid and the modified monomer in ethanol to obtain mixture a, dissolve hexamethylenediamine in ethanol to obtain mixture b. Heat mixture a to 55 - 65 °C, apply stirring at 40 - 60 rpm, slowly add mixture b, react for 1.2 - 1.6 h, then filter, wash with water, and dry. Redissolve the dried product in deionized water to form a saturated solution, transfer it to a polymerization kettle, introduce nitrogen for protection, heat up to 220 - 240 °C and react for 1.6 - 2 h, then reduce the pressure to 1 kPa, continue to heat up to 260 °C and continue to react for 1 h. Discharge, cool, and slice to obtain the modified nylon resin;

[0016] Further, the molar ratio of adipic acid, the modified monomer, and hexamethylenediamine is 1: 0.03 - 0.045: 1.15 - 1.22, and the modified monomer copolymerizes with adipic acid and hexamethylenediamine.

[0017] Preferably, the toughening agent is maleic anhydride grafted POE resin.

[0018] Preferably, the antioxidant is composed of a compound of antioxidant 1098 and antioxidant 626.

[0019] Preferably, the lubricant is polyethylene glycol stearate.

[0020] A preparation method of a renewable marine plastic material PA66, and the specific operation is as follows: Mix a modified nylon resin, zinc powder, a toughening agent, an antioxidant and a lubricant, transfer them into a kneading kettle, knead at 260 ± 5 °C until the torque is stable, discharge and pelletize to obtain the renewable marine plastic material PA66.

[0021] The beneficial effects of the present invention:

[0022] Based on the nylon 66 material, the present invention discloses a modified nylon resin, which can be thermally regenerated at a lower temperature. It is prepared by amine-ester exchange of diallylamine and dimethyl 3,3'-dithiobispropionate to form an intermediate, and then mercaptoacetic acid is subjected to click addition with the double bond in the intermediate to form a modified monomer, which is then copolymerized with adipic acid and hexamethylenediamine; the modified monomer introduces low-bond-energy disulfide bonds into the polymer chain, which are easy to break and melt under high-temperature heat recovery, and the disulfide bonds are re-formed during the curing and regeneration process. The blended and compounded zinc powder can promote the breaking of the disulfide bonds, and the sulfur-nitrogen structure in the modified monomer forms a chelating effect, capturing zinc powder particles during the blending process, efficiently promoting the breaking of the disulfide bonds in situ, effectively reducing the melting point of nylon 66, and realizing the low-energy consumption regeneration of the nylon 66 material; multiple carboxyl groups are introduced into the modified monomer, forming micro-crosslinking during the copolymerization process, compensating for the strength reduction problem caused by the modified monomer breaking the regularity of the polymer chain, and enabling the material to maintain good strength and toughness. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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 making creative efforts belong to the scope of protection of the present invention.

[0024] Example 1, preparing the renewable marine plastic material PA66, and the specific implementation process is as follows:

[0025] (1) Preparation of the modified nylon resin

[0026] Step A1: Take dimethyl 3,3'-dithiobispropionate, diallylamine, trimethylaluminum and anhydrous tetrahydrofuran, mix them by feeding, introduce nitrogen protection, heat up to 70 °C, apply stirring at 180 rpm, and reflux for 2.5 h. Among them, the dosage ratio of dimethyl 3,3'-dithiobispropionate, diallylamine, trimethylaluminum and anhydrous tetrahydrofuran is 0.1 mol: 0.21 mol: 30 mg: 60 mL. After the reaction, rotary evaporation is used to remove tetrahydrofuran, and then washing with water and vacuum drying are carried out to obtain the intermediate.

[0027] Step A2: Take the intermediate, thioglycolic acid, dimethylphenylphosphine and toluene, mix them, pass nitrogen protection, heat to 55 ° C, apply 120 rpm stirring and 200 W / m 2 The reaction was carried out under ultraviolet irradiation for 3 hours, wherein the usage ratio of the intermediate, thioglycolic acid, dimethylphenylphosphine and toluene was 0.1 mol: 0.4 mol: 20 mg: 150 mL. After the reaction was completed, the toluene was removed by vacuum rotary evaporation to obtain a modified monomer.

[0028] Step A3: Add adipic acid and the modified monomer to ethanol and stir until completely dissolved, which is recorded as mixed solution a. Add hexamethylenediamine to ethanol and stir until completely dissolved, which is recorded as mixed solution b. Heat the mixed solution a to 65° C., apply stirring at 60 rpm, and slowly add the mixed solution b. The addition time is controlled to be 30 minutes. After complete addition, continue to stir and react at constant temperature. The total reaction time of the addition of mixed solution b is controlled to be 1.2 hours. The molar ratio of adipic acid, the modified monomer and hexamethylenediamine is 1:0.045:1.22. Then filter, wash with water, and dry. Add the dried product to deionized water to redissolve it into a saturated solution, transfer it to a polymerization kettle, introduce nitrogen protection, heat it to 240° C. and react for 1.6 hours. Then reduce the pressure to 1 kPa, continue to heat it to 260° C. and continue to react for 1 hour. Discharge, cool and slice to obtain modified nylon resin.

[0029] (2) Preparation of renewable marine plastic material PA66

[0030] Ingredients: raw materials are taken in parts by weight, 100 parts of modified nylon resin, which is homemade in this embodiment; 2.4 parts of zinc powder, with a fineness of 1500 mesh; 11 parts of toughening agent, maleic anhydride grafted POE resin is used in the implementation process, selected from KT-913 type raw material of Shenyang Ketong Plastic; 0.1 parts of antioxidant, antioxidant 1098 and antioxidant 626 are used in a weight ratio of 1:1 in the implementation process; 1.5 parts of lubricant, polyethylene glycol stearate PEG-7 is used in the implementation process.

[0031] Blending: The modified nylon resin, zinc powder, toughening agent, antioxidant and lubricant are added into a high-pressure mixer according to parts by weight and mixed evenly. The mixture is then transferred into a mixing kettle and mixed at 260±5°C until the torque is stable. The material is discharged and pelletized to obtain the renewable marine plastic material PA66.

[0032] Example 2: Preparation of renewable marine plastic material PA66. The specific implementation process is as follows:

[0033] (1) Preparation of modified nylon resin

[0034] Step A1: Dimethyl 3,3'-dithiodipropionate, diallylamine, trimethylaluminum, and anhydrous tetrahydrofuran were added and mixed, nitrogen was introduced, the temperature was raised to 60°C, stirring was applied at 120 rpm, and the reaction was refluxed for 3.5 hours. The amount ratio of dimethyl 3,3'-dithiodipropionate, diallylamine, trimethylaluminum, and anhydrous tetrahydrofuran was 0.1 mol:0.205 mol:45 mg:50 mL. After the reaction, tetrahydrofuran was removed by rotary evaporation, and the mixture was washed with water and dried in vacuo to obtain an intermediate.

[0035] Step A2: Take the intermediate, thioglycolic acid, dimethylphenylphosphine and toluene, mix them, pass nitrogen protection, heat to 45 ° C, apply 90 rpm stirring and 150 W / m 2 The reaction was carried out under ultraviolet irradiation for 4 hours, wherein the usage ratio of the intermediate, thioglycolic acid, dimethylphenylphosphine and toluene was 0.1 mol: 0.4 mol: 30 mg: 120 mL. After the reaction was completed, the toluene was removed by vacuum rotary evaporation to obtain a modified monomer.

[0036] Step A3: Add adipic acid and the modified monomer to ethanol and stir until completely dissolved, which is recorded as mixed solution a. Add hexamethylenediamine to ethanol and stir until completely dissolved, which is recorded as mixed solution b. Heat the mixed solution a to 55° C., apply stirring at 40 rpm, and slowly add the mixed solution b. The addition time is controlled to be 50 minutes. After complete addition, continue to stir and react at a constant temperature. The total reaction time of the addition of mixed solution b is controlled to be 1.6 hours. The molar ratio of adipic acid, the modified monomer and hexamethylenediamine is 1:0.03:1.15. Then filter, wash with water, and dry. Add the dried product to deionized water to redissolve it into a saturated solution, transfer it to a polymerization kettle, introduce nitrogen protection, heat it to 220° C. and react for 2 hours. Then reduce the pressure to 1 kPa, continue to heat it to 260° C. and continue to react for 1 hour. Discharge, cool and slice to obtain modified nylon resin.

[0037] (2) Preparation of renewable marine plastic material PA66

[0038] Ingredients: raw materials are taken in parts by weight, 100 parts of modified nylon resin, which is homemade in this embodiment; 1.8 parts of zinc powder, with a fineness of 1500 mesh; 8 parts of toughening agent, maleic anhydride grafted POE resin is used in the implementation process, selected from KT-913 type raw material of Shenyang Ketong Plastic; 0.08 parts of antioxidant, antioxidant 1098 and antioxidant 626 are used in a weight ratio of 1:1 in the implementation process; 1.2 parts of lubricant, polyethylene glycol stearate PEG-7 is used in the implementation process.

[0039] Blending: The modified nylon resin, zinc powder, toughening agent, antioxidant and lubricant are added into a high-pressure mixer according to parts by weight and mixed evenly. The mixture is then transferred into a mixing kettle and mixed at 260±5°C until the torque is stable. The material is discharged and pelletized to obtain the renewable marine plastic material PA66.

[0040] Example 3, preparation of renewable marine plastic material PA66, the specific implementation process is as follows:

[0041] (1) Preparation of modified nylon resin

[0042] Step A1: Dimethyl 3,3'-dithiodipropionate, diallylamine, trimethylaluminum, and anhydrous tetrahydrofuran were added and mixed, nitrogen was introduced, the temperature was raised to 65°C, stirring was applied at 120 rpm, and the reaction was refluxed for 3 h. The amount ratio of dimethyl 3,3'-dithiodipropionate, diallylamine, trimethylaluminum, and anhydrous tetrahydrofuran was 0.1 mol:0.207 mol:40 mg:60 mL. After the reaction, tetrahydrofuran was removed by rotary evaporation, and the mixture was washed with water and dried in vacuo to obtain an intermediate.

[0043] Step A2: Take the intermediate, thioglycolic acid, dimethylphenylphosphine and toluene, mix them, pass nitrogen protection, heat to 50 ° C, apply 120 rpm stirring and 180 W / m 2 The reaction was carried out under ultraviolet irradiation for 3.2 h, wherein the usage ratio of the intermediate, thioglycolic acid, dimethylphenylphosphine and toluene was 0.1 mol: 0.4 mol: 25 mg: 140 mL. After the reaction was completed, the toluene was removed by vacuum rotary evaporation to obtain a modified monomer.

[0044] Step A3: Add adipic acid and the modified monomer to ethanol and stir until completely dissolved, which is recorded as mixed solution a. Add hexamethylenediamine to ethanol and stir until completely dissolved, which is recorded as mixed solution b. Heat the mixed solution a to 60°C, apply stirring at 60 rpm, and slowly add the mixed solution b. The addition time is controlled to be 40 minutes. After complete addition, continue to stir and react at constant temperature. The total reaction time of the addition of mixed solution b is controlled to be 1.4 hours. The molar ratio of adipic acid, the modified monomer and hexamethylenediamine is 1:0.035:1.17. Then filter, wash with water, and dry. Add the dried product to deionized water to redissolve it into a saturated solution, transfer it to a polymerization kettle, introduce nitrogen protection, heat it to 230°C and react for 1.8 hours, then reduce the pressure to 1 kPa, continue to heat it to 260°C and continue to react for 1 hour, discharge it, cool it and slice it to obtain a modified nylon resin.

[0045] (2) Preparation of renewable marine plastic material PA66

[0046] Ingredients: raw materials are taken in parts by weight, 100 parts of modified nylon resin, which is homemade in this embodiment; 2 parts of zinc powder with a fineness of 1500 mesh; 10 parts of toughening agent, maleic anhydride grafted POE resin is used in the implementation process, and it is selected from KT-913 type raw material of Shenyang Ketong Plastic; 0.09 parts of antioxidant, antioxidant 1098 and antioxidant 626 are used in a weight ratio of 1:1 in the implementation process; 1.3 parts of lubricant, polyethylene glycol stearate PEG-7 is used in the implementation process.

[0047] Blending: The modified nylon resin, zinc powder, toughener, antioxidant and lubricant are fed into a high-speed mixer according to parts by weight and mixed evenly, then transferred into a kneading kettle and kneaded at 260 ± 5 °C until the torque is stable, and then discharged and pelletized to obtain the renewable marine plastic material PA66.

[0048] Example 4. Preparation of the renewable marine plastic material PA66. The specific implementation process is as follows:

[0049] (1) Preparation of the modified nylon resin

[0050] Step A1: Take dimethyl 3,3'-dithiobispropionate, diallylamine, trimethylaluminum and anhydrous tetrahydrofuran, feed and mix them, introduce nitrogen for protection, heat up to 68 °C, apply stirring at 180 rpm, and reflux for 2.8 h. Among them, the dosage ratio of dimethyl 3,3'-dithiobispropionate, diallylamine, trimethylaluminum and anhydrous tetrahydrofuran is 0.1 mol: 0.208 mol: 42 mg: 60 mL. After the reaction, rotary evaporation is used to remove tetrahydrofuran, and then it is washed with water and dried under vacuum to obtain an intermediate.

[0051] Step A2: Take the intermediate, mercaptoacetic acid, dimethylphenylphosphine and toluene, feed and mix them, introduce nitrogen for protection, heat up to 50 °C, apply stirring at 120 rpm and ultraviolet irradiation at 150 W / m 2 for 3.6 h. Among them, the dosage ratio of the intermediate, mercaptoacetic acid, dimethylphenylphosphine and toluene is 0.1 mol: 0.4 mol: 30 mg: 140 mL. After the reaction, rotary evaporation under reduced pressure is used to remove toluene to obtain a modified monomer.

[0052] Step A3: Take adipic acid and the modified monomer and add them to ethanol and stir until completely dissolved, denoted as mixture a. Take hexamethylenediamine and add it to ethanol and stir until completely dissolved, denoted as mixture b. Heat mixture a to 65 °C, apply stirring at 60 rpm, slowly add mixture b, control the addition time to be 35 min. After complete addition, continue stirring and reacting at a constant temperature, and control the total addition reaction time of mixture b to be 1.5 h. Among them, the molar ratio of adipic acid, the modified monomer and hexamethylenediamine is 1:0.04:1.18. Then filter, wash with water and dry. Add the dried product to deionized water to redissolve it into a saturated solution, transfer it into a polymerization kettle, introduce nitrogen for protection, heat up to 230 °C and react for 1.8 h, then reduce the pressure to 1 kPa, continue to heat up to 260 °C and continue to react for 1 h, discharge and cool and slice to obtain the modified nylon resin.

[0053] (2) Preparation of the renewable marine plastic material PA66

[0054] Ingredients: raw materials are taken in parts by weight, 100 parts of modified nylon resin, which is homemade in this embodiment; 2.2 parts of zinc powder, with a fineness of 1500 mesh; 10 parts of toughening agent, maleic anhydride grafted POE resin is used in the implementation process, selected from KT-913 type raw material of Shenyang Ketong Plastic; 0.09 parts of antioxidant, antioxidant 1098 and antioxidant 626 are used in a weight ratio of 1:1 in the implementation process; 1.4 parts of lubricant, polyethylene glycol stearate PEG-7 is used in the implementation process.

[0055] Blending: The modified nylon resin, zinc powder, toughening agent, antioxidant and lubricant are added into a high-pressure mixer according to parts by weight and mixed evenly. The mixture is then transferred into a mixing kettle and mixed at 260±5°C until the torque is stable. The material is discharged and pelletized to obtain the renewable marine plastic material PA66.

[0056] Comparative Example 1

[0057] This comparative example refers to Example 4, except that no modifying monomer is added during the preparation of the modified nylon resin, the molar ratio of adipic acid to hexamethylenediamine is 1:1.11, and the rest of the implementation process is exactly the same as Example 4.

[0058] Comparative Example 2

[0059] This comparative example refers to Example 4, and in the preparation process of the modified nylon resin, the modifying monomer is replaced with 3,3'-dithiodipropionic acid, wherein the molar ratio of adipic acid, modifying monomer and hexamethylenediamine is 1:0.08:1.18, and the rest of the implementation process is exactly the same as Example 4.

[0060] The renewable marine plastic material PA66 prepared as above was injection molded into a specimen at an injection temperature of 280°C. The mechanical properties of the specimen were tested using a universal material testing machine at a tensile rate of 20 mm / min. The specimens were also tested using a differential scanning calorimeter (DSC) at a temperature change rate of 10°C / min. The specific test data are shown in the following table:

[0061] Tensile strength / MPa Elongation at break / % Melting temperature / °C Example 1 63.29 5.14 240.6 Example 2 66.02 3.35 246.3 Example 3 64.73 3.92 244.5 Example 4 65.08 4.51 241.7 Comparative example 1 66.17 2.26 263.5 Comparative example 2 51.39 10.82 255.2

[0062] It can be seen from the test results in the above table that the splines of the embodiment maintain good mechanical properties and the melting temperature is significantly reduced, which is conducive to low-energy melting regeneration of the material.

[0063] Throughout the specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0064] The above content is only an example and illustration of the present invention. Those skilled in the art of this technology can make various modifications, supplements, or use similar methods to replace the specific embodiments described. As long as they do not deviate from the invention or exceed the scope defined by this claim book, they shall fall within the protection scope of the present invention.

Claims

1. A renewable marine plastic material PA66, characterized in that, Comprising by weight parts: 100 parts of modified nylon resin, 1.8 - 2.4 parts of zinc powder, 8 - 11 parts of toughening agent, 0.08 - 0.1 part of antioxidant and 1.2 - 1.5 parts of lubricant; The modified nylon resin is prepared by the following method: Step A1: Charge and mix dimethyl 3,3'-dithiobispropionate, diallylamine, trimethylaluminum and anhydrous tetrahydrofuran, introduce nitrogen protection, heat up to 60 - 70 °C, stir and reflux for 2.5 - 3.5 h, after the reaction, rotary evaporate to remove tetrahydrofuran, then wash with water and dry under vacuum to obtain an intermediate; Step A2: Charge and mix the intermediate, mercaptoacetic acid, dimethylphenylphosphine and toluene, introduce nitrogen protection, heat up to 45 - 55 °C, stir and apply ultraviolet irradiation of 150 - 200 W / m2, react for 3 - 4 h, after the reaction, rotary evaporate under reduced pressure to remove toluene to obtain a modified monomer; Step A3: Dissolve adipic acid and the modified monomer in ethanol to obtain a mixed solution a, dissolve hexamethylenediamine in ethanol to obtain a mixed solution b, heat the mixed solution a to 55 - 65 °C, stir and slowly add the mixed solution b, react for 1.2 - 1.6 h, then filter, wash with water and dry, dissolve the dried product in deionized water to form a saturated solution, transfer it to a polymerization kettle, introduce nitrogen protection, heat up to 220 - 240 °C and react for 1.6 - 2 h, then reduce the pressure to 1 kPa, continue to heat up to 260 °C and continue to react for 1 h, discharge, cool and slice to obtain the modified nylon resin; The fineness of the zinc powder is 1500 mesh, and the toughening agent is maleic anhydride grafted POE resin.

2. The renewable marine plastic material PA66 according to claim 1, characterized in that, The dosage ratio of dimethyl 3,3'-dithiobispropionate, diallylamine, trimethylaluminum and anhydrous tetrahydrofuran is 0.1 mol: 0.205 - 0.21 mol: 30 - 45 mg: 50 - 60 mL.

3. A renewable marine plastic material PA66 according to claim 2, characterized in that, The dosage ratio of the intermediate, mercaptoacetic acid, dimethylphenylphosphine and toluene is 0.1 mol: 0.4 mol: 20 - 30 mg: 120 - 150 mL.

4. The renewable marine plastic material PA66 according to claim 3, wherein The molar ratio of adipic acid, modified monomer and hexamethylenediamine is 1: 0.03 - 0.045: 1.15 - 1.

22.

5. A renewable marine plastic material PA66 according to claim 1, characterized in that, The antioxidant is compounded by antioxidant 1098 and antioxidant 626.

6. The renewable marine plastic material PA66 according to claim 1, characterized in that, The lubricant is polyethylene glycol stearate.

7. A preparation method of a renewable marine plastic material PA66 according to any one of claims 1-6, characterized in that, The specific operation is as follows: Mix the modified nylon resin, zinc powder, toughening agent, antioxidant and lubricant evenly, transfer them into a kneading kettle, knead at 260 ± 5 °C until the torque is stable, discharge and pelletize to obtain the renewable marine plastic material PA66.

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