High-strength hydrolysis-resistant aging-resistant nylon master batch and preparation method thereof

Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to a high-strength hydrolysis-resistant and aging-resistant nylon master batch and a preparation method thereof. The high-strength, hydrolysis-resistant and aging-resistant nylon master batch is prepared from the following raw materials in parts by weight: 60 to 80 parts of nylon resin, 5 to 10 parts of a toughening agent, 5 to 10 parts of a hydrolysis-resistant agent, 1 to 5 parts of an antioxidant, 1 to 5 parts of a lubricating agent and 1 to 10 parts of a dispersing agent. According to the nylon master batch disclosed by the invention, the nylon resin is taken as a main raw material, and the flexibilizer, the antioxidant, the lubricant and the dispersing agent are added on the basis, so that the mechanical property of the master batch can be effectively improved, and meanwhile, the nylon master batch also has hydrolysis resistance and aging resistance. The preparation method is simple, the raw materials are rich in source, and industrial production of the nylon master batch can be realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer materials, and more specifically, relates to a high-strength, hydrolysis-resistant and aging-resistant nylon masterbatch and a preparation method thereof. Background Art

[0002] Nylon, also known as polyamide fiber, contains repeating amide groups in its molecular chain and has good processing performance, wear resistance, self-lubricating properties, and chemical corrosion resistance. Based on the good physical and chemical properties of nylon materials, they have good applications in multiple fields.

[0003] Nylon belongs to a type of polymer material with relatively strong polarity, and hydrogen bonds can be formed between molecules. Therefore, it has a relatively high melting temperature, a narrow melting temperature range, an obvious melting point, and excellent mechanical properties, hydrophilicity, lubricity, wear resistance, corrosion resistance, and is easy to process and form, and is widely used in all walks of life. Based on the advantages of good oil resistance, strong barrier properties, non-toxic and odorless, etc., it can be used as a packaging material to store oil products for a long time. There are a large number of extremely strong hydrogen bonds between nylon molecules, making it have good mechanical properties, wear resistance, and corrosion resistance, and is a good 3D printing material. However, the disadvantage of nylon is that it is unstable under strong acids or strong alkalis and has strong hygroscopicity.

[0004] Nylon masterbatch is a granular material made by mixing nylon resin and additives, and is widely used in the plastic processing industry. Nylon masterbatch is usually composed of nylon resin: common types include PA6, PA66, PA11, PA12, etc. and additives: such as plasticizers, stabilizers, flame retardants, antioxidants, etc., so that the finished product has excellent mechanical properties, high temperature resistance, and wear resistance.

[0005] Therefore, it is of great significance to select suitable additives to compound with nylon resin to obtain a high-performance nylon masterbatch. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-strength, hydrolysis-resistant and aging-resistant nylon masterbatch and a preparation method thereof, so that the nylon masterbatch can have the properties of high strength, hydrolysis resistance, and aging resistance.

[0007] Therefore, the present invention provides the following technical solutions.

[0008] One aspect of the present invention provides a high-strength, hydrolysis-resistant and aging-resistant nylon masterbatch, comprising the following raw materials in parts by weight:

[0009] 60 - 80 parts of nylon resin, 5 - 10 parts of toughening agent, 5 - 10 parts of hydrolysis-resistant agent, 1 - 5 parts of antioxidant, 1 - 5 parts of lubricant, and 1 - 10 parts of dispersant.

[0010] In a preferred embodiment of the present invention, the nylon resin is PA6 or PA66.

[0011] In a preferred embodiment of the present invention, the hydrolysis resistance agent is YK-1000 (N,N'-bis(2,6-diisopropylphenyl)carbodiimide).

[0012] In a preferred embodiment of the present invention, the antioxidant is selected from any one or a mixture of two or more of antioxidant 1010, antioxidant 1098, and antioxidant 168.

[0013] In a preferred embodiment of the present invention, the lubricant is selected from one or more of talcum powder, barium sulfate, calcium carbonate, mica, and wollastonite.

[0014] In a preferred embodiment of the present invention, the dispersant is selected from any one or a mixture of two or more of erucamide, calcium stearate, and ethylene bisstearamide.

[0015] In a preferred embodiment of the present invention, the preparation method of the toughening agent comprises the following steps:

[0016] S1: Activate tourmaline at 100-300°C for 4-6 h, then cool to room temperature, grind and dry the obtained product, and sieve it through a 80-200 mesh sieve to obtain activated tourmaline;

[0017] Mix the activated tourmaline, silane coupling agent, and absolute ethanol in a ratio of 1 g: 0.03-0.1 mL: 30-50 mL by mass-volume ratio, and use microwave reflux method to react at 60-100°C for 6-8 h to obtain silane coupling agent-modified tourmaline;

[0018] S2: Mix waterborne polyurethane acrylate resin and acrylate monomer in a 5-10 wt% hydrochloric acid solution in a ratio of 1 mL: (1-3 g): 3-5 mL by volume-mass ratio, and then react at 50-120°C for 2-6 h under the action of an initiator to obtain a copolymer product solution;

[0019] S3: Mix the copolymer product solution and a silver nitrate solution with a concentration of 10-20 wt% in a volume ratio of 1: 0.01-0.05, heat the obtained mixed solution to 50-60°C, then add silane coupling agent-modified tourmaline while stirring, continue stirring for 30-60 min after adding, then let it stand and filter, and dry the obtained solid product to obtain the toughening agent.

[0020] In a preferred embodiment of the present invention, in step S1, the silane coupling agent is selected from any one of cyclohexene oxide methyl dimethoxysilane, cyclohexene oxide methyl diethoxysilane, γ-glycidoxypropyltrimethoxysilane, and γ-glycidoxypropyltriethoxysilane.

[0021] In a preferred embodiment of the present invention, in step S2, the acrylate monomer is selected from any one of methyl acrylate, ethyl acrylate, methyl 2-methylacrylate, and ethyl 2-methylacrylate.

[0022] In a preferred embodiment of the present invention, in step S2, the initiator is selected from any one of sodium persulfate, potassium persulfate, and ammonium persulfate.

[0023] In a preferred embodiment of the present invention, the addition amount of the initiator is 0.2-0.7% of the mass of the acrylate monomer.

[0024] In a preferred embodiment of the present invention, in step S3, the silane coupling agent-modified tourmaline is added in an amount of 1 g: 10-30 mL in terms of the mass-volume ratio with the mixed solution.

[0025] In another aspect of the present invention, there is also provided a method for preparing the high-strength hydrolysis-resistant and aging-resistant nylon masterbatch as described above. The method includes the following steps:

[0026] Weigh each raw material according to parts by weight and mix them evenly to obtain a mixture.

[0027] Place the obtained mixture in a screw extruder and extrude it into nylon strips.

[0028] Cool, cut, and screen the obtained nylon strips to obtain the nylon masterbatch.

[0029] By means of the above technical solutions, the present invention has at least the following advantages:

[0030] The nylon masterbatch of the present invention uses nylon resin as the main raw material. On this basis, a toughening agent, an antioxidant, a lubricant, and a dispersant are also added, which can effectively improve the mechanical properties of the masterbatch and also have the properties of hydrolysis resistance and aging resistance. In the preparation process of the toughening agent of the present invention, on the one hand, tourmaline is used as the raw material, and through activation and the modification of the silane coupling agent, silane coupling agent-modified tourmaline is obtained; then the copolymer produced by the polymerization reaction of the waterborne polyurethane acrylate resin and the acrylate monomer under the initiator is grafted onto the silane coupling agent-modified tourmaline, and at the same time, silver ions with antibacterial properties are introduced. The obtained product is used as a toughening agent in the preparation process of the nylon masterbatch, which can effectively improve the strength, hydrolysis resistance, and aging resistance of the masterbatch. The preparation method of the present invention is simple, the raw materials are rich in sources, and the industrial production of the nylon masterbatch can be realized.

[0031] The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and implement it in accordance with the content of the specification, the following describes the preferred embodiments of the present invention in detail as follows. Detailed implementation manners

[0032] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below 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.

[0033] Unless otherwise specified, the nylon resin used in the embodiments of the present invention is polyamide 6 (PA6), LANXESS, Germany PA6BM230H2.0901510.

[0034] Unless otherwise specified, the anti-hydrolysis agent used in the embodiments of the present invention is YK-1000, chemically named N,N'-bis(2,6-diisopropylphenyl)carbodiimide, CAS No.: 2162-74-5.

[0035] Unless otherwise specified, the process conditions of the screw extruder in the embodiments of the present invention are as follows: Zone 1: 240°C, Zone 2: 245°C, Zone 3: 255°C, Zone 4: 260°C, Zone 5: 250°C, and the screw speed is 500 revolutions per minute.

[0036] Example 1:

[0037] Preparation of toughening agent: Tourmaline is activated at 200 °C for 5 h, then cooled to room temperature. The obtained product is ground, dried, and sieved through a 200-mesh sieve to obtain activated tourmaline. The activated tourmaline, epoxycyclohexylmethyl dimethoxysilane, and absolute ethanol are mixed according to the ratio of 1 g: 0.065 mL: 40 mL by mass-volume ratio. Using the microwave reflux method, the reaction is carried out at 80 °C for 7 h to obtain epoxycyclohexylmethyl dimethoxysilane-modified tourmaline. The aqueous polyurethane acrylate resin and methyl acrylate are mixed in an 8 wt% hydrochloric acid solution according to the ratio of 1 mL: 2 g: 4 mL by volume-mass ratio. Then, under the action of ammonium persulfate (the addition amount is 0.5% of the mass of methyl acrylate), the reaction is carried out at 70 °C for 4 h to obtain a copolymer solution. The copolymer solution and a 15 wt% silver nitrate solution are mixed evenly according to the volume ratio of 1: 0.03. After that, the obtained mixed solution is heated to 60 °C, and epoxycyclohexylmethyl dimethoxysilane-modified tourmaline is added while stirring (added according to the amount of 1 g: 20 mL by mass-volume ratio with the mixed solution). After the addition, continue stirring for 50 min, then let it stand and filter. The obtained solid product is dried to obtain the toughening agent.

[0038] Preparation of nylon masterbatch: By weight, 70 parts of nylon resin, 7.5 parts of toughening agent, 7.5 parts of hydrolysis-resistant agent YK-1000 (N,N'-bis(2,6-diisopropylphenyl)carbodiimide), 2 parts of antioxidant 1010, 3 parts of talcum powder, and 10 parts of calcium stearate are weighed. The raw materials are mixed evenly to obtain a mixture. The obtained mixture is placed in a screw extruder and extruded into nylon strips. The obtained nylon strips are cooled, cut, and screened to obtain the nylon masterbatch.

[0039] Example 2:

[0040] Preparation of toughening agent: Tourmaline was activated at 300 °C for 4 h, then cooled to room temperature. The obtained product was ground, dried, and sieved through a 200-mesh sieve to obtain activated tourmaline. The activated tourmaline, epoxycyclohexylmethyldiethoxysilane, and absolute ethanol were mixed in a mass-to-volume ratio of 1 g: 0.03 mL: 30 mL, and reacted at 100 °C for 6 h using microwave reflux method to obtain epoxycyclohexylmethyldiethoxysilane-modified tourmaline. Aqueous polyurethane acrylate resin and ethyl acrylate were mixed in a 5 wt% hydrochloric acid solution in a volume-to-mass ratio of 1 mL: 3 g: 5 mL, and then reacted at 80 °C for 2 h under the action of ammonium persulfate (the addition amount was 0.7% of the mass of ethyl acrylate) to obtain a copolymer solution. The copolymer solution and a 10 wt% silver nitrate solution were mixed evenly in a volume ratio of 1: 0.01. After the obtained mixed solution was heated to 60 °C, epoxycyclohexylmethyldiethoxysilane-modified tourmaline was added while stirring (added in an amount of 1 g: 10 mL based on the mass-to-volume ratio of the mixed solution). After the addition, stirring was continued for 30 min, and then the mixture was allowed to stand and filtered. The obtained solid product was dried to obtain the toughening agent.

[0041] Preparation of nylon masterbatch: By weight, 80 parts of nylon resin, 5 parts of toughening agent, 5 parts of hydrolysis-resistant agent YK-1000 (N,N'-bis(2,6-diisopropylphenyl)carbodiimide), 3 parts of antioxidant 168, 1 part of barium sulfate, and 6 parts of erucamide were weighed. The raw materials were mixed evenly to obtain a mixture. The obtained mixture was placed in a screw extruder and extruded into nylon strips. The obtained nylon strips were cooled, cut, and screened to obtain nylon masterbatch.

[0042] Example 3:

[0043] Preparation of toughening agent: Tourmaline is activated at 100 °C for 6 h, then cooled to room temperature. The obtained product is ground, dried and sieved through a 200-mesh sieve to obtain activated tourmaline. The activated tourmaline, γ-glycidoxypropyltrimethoxysilane and absolute ethanol are mixed according to the ratio of 1 g: 0.1 mL: 50 mL by mass-volume ratio, and reacted at 60 °C for 8 h by microwave reflux method to obtain γ-glycidoxypropyltrimethoxysilane-modified tourmaline. Aqueous polyurethane acrylate resin and methyl methacrylate are mixed in a 10 wt% hydrochloric acid solution according to the ratio of 1 mL: 1 g: 3 mL by volume-mass ratio, and then reacted at 60 °C for 6 h under the action of ammonium persulfate (the addition amount is 0.2% of the mass of methyl methacrylate) to obtain a copolymer solution. The copolymer solution and a silver nitrate solution with a concentration of 20 wt% are mixed evenly according to the volume ratio of 1: 0.05. After the obtained mixed solution is heated to 50 °C, γ-glycidoxypropyltrimethoxysilane-modified tourmaline is added while stirring (added in an amount of 1 g: 30 mL by mass-volume ratio with the mixed solution). After the addition is completed, stirring is continued for 60 min, and then it is left to stand and filtered. The obtained solid product is dried to obtain the toughening agent.

[0044] Preparation of nylon masterbatch: By weight, 60 parts of nylon resin, 10 parts of toughening agent, 10 parts of hydrolysis-resistant agent YK-1000 (N,N'-bis(2,6-diisopropylphenyl)carbodiimide), 5 parts of antioxidant 1098, 5 parts of calcium carbonate and 10 parts of calcium stearate are weighed. The raw materials are mixed evenly to obtain a mixture. The obtained mixture is placed in a screw extruder and extruded into a nylon strip. The obtained nylon strip is cooled, cut and screened to obtain the nylon masterbatch.

[0045] Example 4:

[0046] Preparation of toughening agent: Tourmaline is activated at 200 °C for 6 h, then cooled to room temperature. The obtained product is ground, dried, and sieved through a 200-mesh sieve to obtain activated tourmaline. The activated tourmaline, γ-glycidoxypropyltriethoxysilane, and absolute ethanol are mixed according to the ratio of 1 g: 0.08 mL: 40 mL by mass-volume ratio. Using the microwave reflux method, the reaction is carried out at 70 °C for 8 h to obtain γ-glycidoxypropyltriethoxysilane-modified tourmaline. The aqueous polyurethane acrylate resin and ethyl methacrylate are mixed in a 9 wt% hydrochloric acid solution according to the ratio of 1 mL: 2 g: 5 mL by volume-mass ratio. Then, under the action of ammonium persulfate (the addition amount is 0.6% of the mass of ethyl methacrylate), the reaction is carried out at 70 °C for 4 h to obtain a copolymer solution. The copolymer solution and a 15 wt% silver nitrate solution are mixed evenly according to the volume ratio of 1: 0.02. After that, the obtained mixed solution is heated to 55 °C, and γ-glycidoxypropyltriethoxysilane-modified tourmaline is added while stirring (added in an amount of 1 g: 10 mL by mass-volume ratio with the mixed solution). After the addition, stirring is continued for 50 min, and then left to stand and filtered. The obtained solid product is dried to obtain the toughening agent.

[0047] Preparation of nylon masterbatch: By weight, 75 parts of nylon resin, 5 parts of toughening agent, 5 parts of hydrolysis-resistant agent YK-1000 (N,N'-bis(2,6-diisopropylphenyl)carbodiimide), 5 parts of antioxidant 1010, 5 parts of mica, and 5 parts of erucamide are weighed. The raw materials are mixed evenly to obtain a mixture. The obtained mixture is placed in a screw extruder and extruded into nylon strips. The obtained nylon strips are cooled, cut, and screened to obtain nylon masterbatch.

[0048] Comparative Example 1:

[0049] Preparation of toughening agent: Tourmaline, epoxycyclohexylmethyl dimethoxysilane, and absolute ethanol are mixed according to the ratio of 1 g: 0.065 mL: 40 mL by mass-volume ratio. Using the microwave reflux method, the reaction is carried out at 80 °C for 7 h to obtain epoxycyclohexylmethyl dimethoxysilane-modified tourmaline. The aqueous polyurethane acrylate resin and methyl acrylate are mixed in an 8 wt% hydrochloric acid solution according to the ratio of 1 mL: 2 g: 4 mL by volume-mass ratio. Then, under the action of ammonium persulfate (the addition amount is 0.5% of the mass of methyl acrylate), the reaction is carried out at 70 °C for 4 h to obtain a copolymer solution. The copolymer solution and a 15 wt% silver nitrate solution are mixed evenly according to the volume ratio of 1: 0.03. After that, the obtained mixed solution is heated to 60 °C, and epoxycyclohexylmethyl dimethoxysilane-modified tourmaline is added while stirring (added in an amount of 1 g: 20 mL by mass-volume ratio with the mixed solution). After the addition, stirring is continued for 50 min, and then left to stand and filtered. The obtained solid product is dried to obtain the toughening agent.

[0050] Preparation of nylon masterbatch: By weight, 70 parts of nylon resin, 7.5 parts of toughening agent, 7.5 parts of anti-hydrolysis agent YK-1000 (N,N'-bis(2,6-diisopropylphenyl)carbodiimide), 2 parts of antioxidant 1010, 3 parts of talcum powder and 10 parts of calcium stearate are weighed. The raw materials are mixed evenly to obtain a mixture. The obtained mixture is placed in a screw extruder and extruded into nylon strips. The obtained nylon strips are cooled, cut and screened to obtain nylon masterbatch.

[0051] Comparative Example 2:

[0052] Preparation of toughening agent: Tourmaline is activated at 200 °C for 5 h, then cooled to room temperature. The obtained product is ground, dried and sieved through a 200-mesh sieve to obtain activated tourmaline. According to the volume-mass ratio of 1 mL: 2 g: 4 mL, waterborne polyurethane acrylate resin and methyl acrylate are mixed in an 8 wt% hydrochloric acid solution, and then reacted at 70 °C for 4 h under the action of ammonium persulfate (the addition amount is 0.5% of the mass of methyl acrylate) to obtain a copolymer solution. The copolymer solution is mixed evenly with a 15 wt% silver nitrate solution according to the volume ratio of 1:0.03. After the obtained mixed solution is heated to 60 °C, activated tourmaline is added while stirring (added in an amount of 1 g: 20 mL of the mass-volume ratio of the mixed solution). After the addition is completed, stirring is continued for 50 min, and then left to stand and filtered. The obtained solid product is dried to obtain a toughening agent.

[0053] Preparation of nylon masterbatch: By weight, 70 parts of nylon resin, 7.5 parts of toughening agent, 7.5 parts of anti-hydrolysis agent YK-1000 (N,N'-bis(2,6-diisopropylphenyl)carbodiimide), 2 parts of antioxidant 1010, 3 parts of talcum powder and 10 parts of calcium stearate are weighed. The raw materials are mixed evenly to obtain a mixture. The obtained mixture is placed in a screw extruder and extruded into nylon strips. The obtained nylon strips are cooled, cut and screened to obtain nylon masterbatch.

[0054] Comparative Example 3:

[0055] Preparation of toughening agent: The aqueous polyurethane acrylate resin and methyl acrylate were mixed in an 8 wt% hydrochloric acid solution according to the volume-to-mass ratio of 1 mL: 2 g: 4 mL, and then reacted at 70 °C for 4 h under the action of ammonium persulfate (the addition amount was 0.5% of the mass of methyl acrylate) to obtain a copolymer solution. The copolymer solution was mixed evenly with a 15 wt% silver nitrate solution according to the volume ratio of 1:0.03. After heating the obtained mixed solution to 60 °C, tourmaline was added while stirring (added in an amount of 1 g: 20 mL in terms of the mass-to-volume ratio with the mixed solution). After the addition, stirring was continued for 50 min, and then it was allowed to stand and filtered. The obtained solid product was dried to obtain the toughening agent.

[0056] Preparation of nylon masterbatch: By weight, 70 parts of nylon resin, 7.5 parts of toughening agent, 7.5 parts of hydrolysis-resistant agent YK-1000 (N,N'-bis(2,6-diisopropylphenyl)carbodiimide), 2 parts of antioxidant 1010, 3 parts of talcum powder, and 10 parts of calcium stearate were weighed. The raw materials were mixed evenly to obtain a mixture. The obtained mixture was placed in a screw extruder and extruded into nylon strips. The obtained nylon strips were cooled, cut, and screened to obtain the nylon masterbatch.

[0057] Comparative Example 4:

[0058] Preparation of toughening agent: The aqueous polyurethane acrylate resin and methyl acrylate were mixed in an 8 wt% hydrochloric acid solution according to the volume-to-mass ratio of 1 mL: 2 g: 4 mL, and then reacted at 70 °C for 4 h under the action of ammonium persulfate (the addition amount was 0.5% of the mass of methyl acrylate) to obtain a copolymer solution. The copolymer solution was mixed evenly with a 15 wt% silver nitrate solution according to the volume ratio of 1:0.03. After heating the obtained mixed solution to 60 °C, stirring was carried out for 50 min, and then it was allowed to stand and filtered. The obtained solid product was dried to obtain the toughening agent.

[0059] Preparation of nylon masterbatch: By weight, 70 parts of nylon resin, 7.5 parts of toughening agent, 7.5 parts of hydrolysis-resistant agent YK-1000 (N,N'-bis(2,6-diisopropylphenyl)carbodiimide), 2 parts of antioxidant 1010, 3 parts of talcum powder, and 10 parts of calcium stearate were weighed. The raw materials were mixed evenly to obtain a mixture. The obtained mixture was placed in a screw extruder and extruded into nylon strips. The obtained nylon strips were cooled, cut, and screened to obtain the nylon masterbatch.

[0060] Comparative Example 5:

[0061] Preparation of Nylon Masterbatch: By weight, 70 parts of nylon resin, 7.5 parts of hydrolysis inhibitor YK-1000 (N,N'-bis(2,6-diisopropylphenyl)carbodiimide), 2 parts of antioxidant 1010, 3 parts of talcum powder and 10 parts of calcium stearate were weighed. The raw materials were mixed evenly to obtain a mixture. The obtained mixture was placed in a screw extruder and extruded into nylon strips. The obtained nylon strips were cooled, cut and screened to obtain nylon masterbatch.

[0062] Experiment 1: Comprehensive Performance Detection of Nylon Masterbatch

[0063] The nylon masterbatches of Examples 1-4 and Comparative Examples 1-5 were respectively injection molded into standard specimens, and the mechanical properties of each group of specimens were tested: the tensile strength test standard was ASTM D638, the flexural strength and flexural modulus test standards were ASTM D790, the notched impact strength (ASTM D756), heat distortion temperature (ASTM D648) and water absorption rate;

[0064] Test method for water absorption rate of the material: The injection molded specimen was first placed in a vacuum oven at 80°C and dried for 48 h, cooled to room temperature in a desiccator, taken out and quickly weighed to obtain the mass W0; then the specimen was immersed in a deionized water bath at room temperature, and after soaking for 72 hours, the specimen was taken out, dried with a dry cloth strip and quickly weighed to obtain the mass W. The water absorption rate W f can be obtained from the formula:

[0065] W f =(W - W0) / W0 * 100%.

[0066] The results are shown in Table 1.

[0067] Table 1 Performance Detection of Each Group of Nylon Masterbatches

[0068]

[0069] As can be seen from the results in Table 1, compared with Comparative Examples 1-5, the nylon masterbatches of Examples 1-4 of the present invention have higher performance, such as higher strength, including tensile strength, flexural strength, etc., and also have higher water resistance and high temperature resistance. Among them, in Comparative Example 1, the tourmaline was not activated, in Comparative Example 2, the tourmaline was not modified with a silane coupling agent, in Comparative Example 3, the tourmaline was not simultaneously activated and modified with a silane coupling agent, and the performance such as the tensile strength of the nylon obtained in Comparative Example 3 was significantly lower than that in Comparative Example 1 and Comparative Example 2. This result shows that activating the tourmaline and modifying it with a silane coupling agent can synergistically increase the performance of nylon. In Comparative Example 3, no tourmaline was added, and in Comparative Example 4, no toughening agent was added. The performance difference between the nylon without adding tourmaline and the nylon obtained by not activating and modifying the tourmaline with a silane coupling agent is not significant, indicating that only adding tourmaline cannot significantly enhance the performance of nylon. The performance of the nylon in Comparative Example 4 without adding a toughening agent is significantly lower than that of other examples. This result shows that adding a toughening agent can significantly improve the performance of the obtained nylon, including tensile strength, flexural strength, etc., and also has higher water resistance and high temperature resistance.

[0070] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed methods and technical contents within the scope of the technical solution of the present invention to obtain equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A high-strength, hydrolysis-resistant and aging-resistant nylon masterbatch, characterized in that, It comprises raw materials in the following parts by weight: 60 - 80 parts of nylon resin, 5 - 10 parts of toughening agent, 5 - 10 parts of hydrolysis inhibitor, 1 - 5 parts of antioxidant, 1 - 5 parts of lubricant and 1 - 10 parts of dispersant.

2. The high-strength hydrolysis-resistant and aging-resistant nylon masterbatch according to claim 1, wherein The nylon resin is PA6 or PA66; The hydrolysis inhibitor is YK - 1000.

3. The high-strength hydrolysis-resistant and aging-resistant nylon masterbatch according to claim 1, characterized in that, The antioxidant is selected from any one or a mixture of two or more of antioxidant 1010, antioxidant 1098 and antioxidant 168.

4. The high-strength hydrolysis-resistant and aging-resistant nylon masterbatch according to claim 1, wherein The lubricant is selected from one or more of talcum powder, barium sulfate, calcium carbonate, mica and wollastonite.

5. The high-strength hydrolysis-resistant and aging-resistant nylon masterbatch according to claim 1, wherein The dispersant is selected from any one or a mixture of two or more of erucic acid amide, calcium stearate and ethylene bisstearamide.

6. The high-strength hydrolysis-resistant and aging-resistant nylon masterbatch according to claim 1, characterized in that, The preparation method of the toughening agent comprises the following steps: S1: Activate tourmaline at 100 - 300 °C for 4 - 6 h, then cool it to room temperature, grind and dry the obtained product, and sieve it through a 80 - 200 - mesh sieve to obtain activated tourmaline; Mix the activated tourmaline, silane coupling agent and absolute ethanol according to the ratio of mass - volume ratio 1 g: 0.03 - 0.1 mL: 30 - 50 mL, and use microwave reflux method to react at 60 - 100 °C for 6 - 8 h to obtain silane coupling agent - modified tourmaline; S2: Mix water - borne polyurethane acrylate resin and acrylate monomer in a 5 - 10 wt% hydrochloric acid solution according to the ratio of volume - mass ratio 1 mL: (1 - 3 g): 3 - 5 mL, and then under the action of an initiator, react at 50 - 120 °C for 2 - 6 h to obtain a copolymer solution; S3: Mix the copolymer solution and a silver nitrate solution with a concentration of 10 - 20 wt% according to a volume ratio of 1: 0.01 - 0.05, then heat the obtained mixed solution to 50 - 60 °C, add silane coupling agent - modified tourmaline while stirring, continue stirring for 30 - 60 min after adding, then stand still and filter, and dry the obtained solid product to obtain the toughening agent.

7. The high-strength hydrolysis-resistant and aging-resistant nylon masterbatch according to claim 6, characterized in that, In step S1, the silane coupling agent is selected from any one of epoxycyclohexylmethyl dimethoxysilane, epoxycyclohexylmethyl diethoxysilane, γ - glycidoxypropyltrimethoxysilane and γ - glycidoxypropyltriethoxysilane.

8. The high-strength hydrolysis-resistant and aging-resistant nylon masterbatch according to claim 6, characterized in that, In step S2, the acrylate monomer is selected from any one of methyl acrylate, ethyl acrylate, methyl 2 - methylacrylate and ethyl 2 - methylacrylate.

9. The high-strength hydrolysis-resistant and aging-resistant nylon masterbatch according to claim 6, wherein In step S2, the initiator is selected from any one of sodium persulfate, potassium persulfate and ammonium persulfate; The addition amount of the initiator is 0.2 - 0.7% of the mass of the acrylate monomer.

10. The high-strength hydrolysis-resistant and aging-resistant nylon masterbatch according to claim 6, characterized in that, In step S3, the silane coupling agent - modified tourmaline is added in an amount according to the mass - volume ratio of 1 g: 10 - 30 mL to the mixed solution.

Images