阅读说明：本技术 耐油型tpv组合物及其制备方法 (Oil-resistant TPV composition and preparation method thereof ) 是由 刘浩 王晓敏 王晶 张新华 刘容德 孙丽朋 王秀丽 苏建华 李长春 高磊 于 2020-06-24 设计创作，主要内容包括：本发明树脂合成技术领域,具体涉及一种耐油型TPV组合物及其制备方法。所述的耐油型TPV组合物,包括以下重量份数的原料：注塑级尼龙30～40份；丁腈橡胶40～70份；相容剂8～15份；稳定剂0.5～1.0份；复合硫化剂4～6.5份；偏苯三酸三辛酯10～20份；硬脂酸1.0～1.5份；沉淀法白炭黑10～20份防老剂0.5～2份。本发明采用一步高温造粒法制备TPV组合物,减少了PA和NBR的受热历程,大大降低了材料的降解程度,提高了TPV的性能。并且能够使PA、ABS-g-MAH粉末不经过高温热历程就可以达到良好的预分散效果,能够提高TPV的加工稳定性、耐油性能和TPV制品的性能。(The invention belongs to the technical field of resin synthesis, and particularly relates to an oil-resistant TPV composition and a preparation method thereof. The oil-resistant TPV composition comprises the following raw materials in parts by weight: 30-40 parts of injection molding grade nylon; 40-70 parts of nitrile rubber; 8-15 parts of a compatilizer; 0.5-1.0 part of a stabilizer; 4-6.5 parts of a composite vulcanizing agent; 10-20 parts of trioctyl trimellitate; 1.0-1.5 parts of stearic acid; 10-20 parts of precipitated silica white and 0.5-2 parts of anti-aging agent. The TPV composition is prepared by adopting a one-step high-temperature granulation method, so that the heating histories of PA and NBR are reduced, the degradation degree of the material is greatly reduced, and the performance of TPV is improved. And the PA powder and the ABS-g-MAH powder can achieve good pre-dispersion effect without high-temperature thermal history, and the processing stability and the oil resistance of the TPV and the performance of TPV products can be improved.)

1. An oil-resistant TPV composition, which is characterized in that: the composite material comprises the following raw materials in parts by weight:

2. the oil resistant TPV composition of claim 1, characterized in that: the injection-molding-grade nylon is injection-grade nylon 6, and the average particle size is less than or equal to 100 mu m.

3. The oil resistant TPV composition of claim 1, characterized in that: the nitrile rubber is acrylonitrile rubber with the acrylonitrile content of 18-46%.

4. The oil resistant TPV composition of claim 1, characterized in that: the compatilizer is ABS-g-MAH, the grafting ratio is 0.8-1.5%, and the average particle size is less than or equal to 100 mu m.

5. The oil resistant TPV composition of claim 1, characterized in that: the stabilizer is N, N^′-bis (2,2,6, 6-tetramethyl-4-piperidinyl) -1, 3-benzenedicarboxamide.

6. The oil resistant TPV composition of claim 1, characterized in that: the composite vulcanizing agent is prepared by compounding 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexyne and magnesium methacrylate, wherein the mass ratio of the 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexyne to the magnesium methacrylate is (1-1.5): 3 to 5.

7. The oil resistant TPV composition of claim 1, characterized in that: the anti-aging agent is anti-aging agent RD and anti-aging agent 4010.

8. A method for producing the oil-resistant TPV composition of any one of claims 1 to 7, characterized in that: the method comprises the following steps:

(1) uniformly mixing injection molding grade nylon, nitrile rubber, a compatilizer, a stabilizer, a composite vulcanizing agent, trioctyl trimellitate, stearic acid, precipitated white carbon black and an anti-aging agent, and granulating to obtain nitrile rubber composite particles;

(2) and (3) dynamically vulcanizing and granulating the composite particles in a double-screw extruder with the length-diameter ratio of 40-60 to obtain the oil-resistant TPV composition particles.

9. The method for producing an oil-resistant TPV composition according to claim 8, characterized in that: in the step (1), a single-screw granulator is adopted for granulation at a low temperature of 50 ℃.

10. The method for producing an oil-resistant TPV composition according to claim 8, characterized in that: in the step (2), the temperature of the melting homogenization section of the dynamic vulcanization of the double-screw extruder is 210-215 ℃, the temperature of the dynamic vulcanization section is 220-230 ℃, and the temperature of the extrusion molding section is 210-215 ℃.

Technical Field

The invention belongs to the technical field of resin synthesis, and particularly relates to an oil-resistant TPV composition and a preparation method thereof.

Background

TPV is a thermoplastic vulcanizate prepared by dynamic vulcanization, which has both the processability of plastics and the elasticity of rubber. Compared with thermosetting rubber, TPV has the advantages of simple processing and forming process, high production efficiency and repeatable processing of leftover materials and reclaimed materials; compared with plastic, TPV has the advantages of good rebound resilience, good low temperature resistance, soft touch and the like. Currently, TPVs are being widely applied to the fields of automobiles, engineering and construction, and medical use, and are developing towards specialized functionalization, such as oil-resistant TPVs, heat-resistant TPVs, aging-resistant TPVs, wear-resistant TPVs, and the like. The oil-resistant TPV is mainly used for oil-resistant gaskets, sleeves, hoses and the like.

CN110054815A discloses a dynamically vulcanized nitrile rubber/nylon thermoplastic elastomer and a preparation method thereof, wherein the dynamically vulcanized nitrile rubber/nylon thermoplastic elastomer comprises the following components in parts by mass: nitrile rubber: 100 parts, nylon 6: 30-90 parts of a vulcanizing agent: 0.1-5 parts of stabilizer: 0.01-3 parts of an anti-aging agent: 0.1-0.5 parts of antioxidant: 0.1-5 parts. Firstly, uniformly mixing nitrile rubber, a crosslinking agent, a crosslinking assistant, a stabilizer and an anti-aging agent in a normal-temperature internal mixer, granulating the rubber, then uniformly stirring the rubber, nylon particles and other components in a high-speed stirrer, and finally putting the mixed rubber and nylon mixture into a double-screw extruder for dynamic vulcanization to prepare the nitrile rubber/nylon thermoplastic elastomer. The stabilizer used in the invention is a general hindered amine stabilizer and a phosphite stabilizer, and has a limited stabilizing effect on a nylon/nitrile rubber system. In addition, the invention does not add compatilizer, and the nitrile rubber and the nylon can generate interface separation, so that the mechanical property of the elastomer is not high.

CN110092954A discloses a nitrile rubber/nylon thermoplastic elastomer and a preparation method thereof, wherein the thermoplastic elastomer contains nitrile rubber, nylon, a vulcanizing agent, an anti-aging agent, an antioxidant and an auxiliary agent, the vulcanizing agent is an organic peroxide and is selected from at least one of dicumyl peroxide, bis (tert-butylperoxyisopropyl) benzene, tert-butylcumyl peroxide, 2, 5-bis (tert-butylperoxy) -2, 5-dimethyl-3-hexyne, 2, 5-bis (tert-butylperoxy) -2, 5-dimethylhexane, dibenzoyl peroxide, tert-butyl peroxybenzoate and tert-butyl peroxide. The preparation method comprises the following steps: (1) carrying out first mixing on a component A containing nitrile rubber, an anti-aging agent and an auxiliary agent to obtain a master batch; melting and plasticizing the component B containing the nylon and the antioxidant to obtain a first mixture; (2) carrying out melt blending on the first mixture and the master batch to obtain a mixed material; (3) extruding and granulating the mixed material to obtain mixed particles; (4) and dynamically vulcanizing the mixed material particles and a component C containing a vulcanizing agent and granulating.

In the invention, the process is too complicated, and the nylon component undergoes 4 times of melting processes, which undoubtedly increases the thermal degradation of nylon, thereby reducing the performance of the elastomer. In addition, the invention does not add a compatilizer.

CN104672551A discloses a nitrile rubber/nylon 66 alloy, the blending formula combination is as follows according to the mass share ratio: nitrile rubber: 70-90 parts, nylon 66: 10-30 parts of a stabilizer: 0.5-5 parts of a compatilizer: 2-8 parts of an antioxidant: 0.5-2 parts of a release agent: 2-3 parts. However, the components of the stabilizer and the compatilizer are not expressed, the dynamic vulcanization process is not adopted, the nitrile rubber is not crosslinked, and the oil resistance effect of the nitrile rubber has a space for improving.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the oil-resistant TPV composition and the preparation method thereof are provided, so that the processing stability and the oil resistance of the TPV and the performance of a TPV product can be improved.

The oil-resistant TPV composition comprises the following raw materials in parts by weight:

the injection-molded nylon is injection-molded nylon 6(PA6), has an average particle size of less than or equal to 100 mu m, can be prepared by grinding and crushing granular PA6 granules, and can also be directly prepared from nylon powder.

The Nitrile Butadiene Rubber (NBR) is acrylonitrile butadiene rubber with the acrylonitrile content of 18-46%.

The compatilizer is ABS-g-MAH, the grafting ratio is 0.8-1.5%, the average particle size is less than or equal to 100 mu m, the compatilizer can be prepared by grinding granules of the ABS-g-MAH, and powdered ABS-g-MAH can also be directly used, namely powder which is produced by grafting maleic anhydride in the ABS polymerization process and is not granulated.

The stabilizer is N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide.

The composite vulcanizing agent is prepared by compounding 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexyne and magnesium methacrylate, wherein the mass ratio of the 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexyne to the magnesium methacrylate is (1-1.5): 3 to 5.

The anti-aging agent is anti-aging agent RD and anti-aging agent 4010.

The preparation method of the oil-resistant TPV composition comprises the following steps:

(1) adding injection molding grade nylon, nitrile rubber, a compatilizer, a stabilizer, a composite vulcanizing agent, trioctyl trimellitate, stearic acid, precipitated white carbon black and an anti-aging agent into an internal mixer to be internally mixed uniformly at normal temperature, and then granulating the internally mixed rubber blocks at low temperature of 50 ℃ by using a single-screw granulator to obtain nitrile rubber composite particles containing unmelted PA6 powder;

(2) and (3) dynamically vulcanizing and granulating the composite particles in a double-screw extruder with the length-diameter ratio of 40-60 to obtain the oil-resistant TPV composition particles.

In the step (2), the temperature of the melting homogenization section of the dynamic vulcanization of the double-screw extruder is 210-215 ℃, the temperature of the dynamic vulcanization section is 220-230 ℃, and the temperature of the extrusion molding section is 210-215 ℃.

Compared with the prior art, the invention has the following beneficial effects:

1. the TPV composition is prepared by adopting a one-step high-temperature granulation method, so that the heating histories of PA and NBR are reduced, the degradation degree of the material is greatly reduced, and the performance of TPV is improved. And the PA and ABS-g-MAH powder is dispersed into the rubber phase in advance through a normal-temperature banburying process and then subjected to low-temperature granulation through a low-temperature premixing process, so that the PA and ABS-g-MAH powder can achieve a good pre-dispersion effect without a high-temperature thermal history.

2. The novel stabilizer N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide is added, so that the thermal stability of nylon 6 in the high-temperature dynamic vulcanization double screw with large length-diameter ratio can be improved, and the degradation of a nylon 6/NBR system is prevented, thereby improving the processing stability of TPV and the performance of TPV products.

3. The compatilizer ABS-g-MAH can improve the interface compatibility of PA6 and NBR, thereby improving the mechanical property of TPV.

4. The 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexyne and magnesium methacrylate compounded vulcanization system can ensure the processing fluidity of PA6/NBR in a melting plasticizing section of a screw rod and can also ensure that NBR particles dispersed in a plastic phase PA6 can quickly complete vulcanization crosslinking reaction in a dynamic vulcanization section, thereby ensuring the excellent processing performance and oil resistance of PA6/NBR TPV.

Detailed Description

The present invention will be further described with reference to the following examples.

All the raw materials used in the examples are commercially available unless otherwise specified.

Example 1

70 parts of NBR rubber, 30 parts of PA6, 8 parts of ABS-g-MAH, 10 parts of TOTM, 1.5 parts of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexyne, 0.5 part of stabilizer N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, 5.0 parts of magnesium methacrylate, 1.5 parts of stearic acid, 20 parts of white carbon black, 0.5 part of antioxidant RD and 0.5 part of antioxidant 4010 are added into an internal mixer to be internally mixed uniformly at normal temperature, and then the internally mixed rubber block is granulated at low temperature of 50 ℃ by using a single screw to obtain the nitrile rubber composite particles containing unmelted PA6 powder. And (3) dynamically vulcanizing and granulating the composite particles in a double screw with the length-diameter ratio of 50 to obtain the oil-resistant TPV composition particles. The temperature of a melting homogenization section of the double-screw extruder is 210-215 ℃, the temperature of a dynamic vulcanization section is 220-230 ℃, and the temperature of an extrusion molding section is as follows: 210 to 215 ℃.

Example 2

40 parts of NBR rubber, 40 parts of PA6, 15 parts of ABS-g-MAH, 20 parts of TOTM, 1.0 part of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexyne, 1.0 part of stabilizer N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, 3.0 part of magnesium methacrylate, 1.0 part of stearic acid, 10 parts of white carbon black, 0.5 part of antioxidant RD and 0.5 part of antioxidant 4010 are added into an internal mixer to be internally mixed uniformly at normal temperature, and then the internally mixed rubber block is granulated at low temperature of 50 ℃ by using a single screw to obtain the nitrile rubber composite particles containing unmelted PA6 powder. And (3) dynamically vulcanizing and granulating the composite particles in a double screw with the length-diameter ratio of 50 to obtain the oil-resistant TPV composition particles. The temperature of a melting homogenization section of the double-screw extruder is 210-215 ℃, the temperature of a dynamic vulcanization section is 220-230 ℃, and the temperature of an extrusion molding section is as follows: 210 to 215 ℃.

Example 3

60 parts of NBR rubber, 35 parts of PA6, 13 parts of ABS-g-MAH, 15 parts of TOTM, 1.2 parts of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexyne, 0.7 part of stabilizer N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, 4.0 parts of magnesium methacrylate, 1.3 parts of stearic acid, 15 parts of white carbon black, 0.5 part of antioxidant RD and 0.5 part of antioxidant 4010 are added into an internal mixer to be internally mixed uniformly at normal temperature, and then the internally mixed rubber block is granulated at low temperature of 50 ℃ by using a single screw to obtain the nitrile rubber composite particles containing unmelted PA6 powder. And (3) dynamically vulcanizing and granulating the composite particles in a double screw with the length-diameter ratio of 50 to obtain the oil-resistant TPV composition particles. The temperature of a melting homogenization section of the double-screw extruder is 210-215 ℃, the temperature of a dynamic vulcanization section is 220-230 ℃, and the temperature of an extrusion molding section is as follows: 210 to 215 ℃.

Example 4

60 parts of NBR rubber, 35 parts of PA6, 13 parts of ABS-g-MAH, 15 parts of TOTM, 1.2 parts of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexyne, 0.7 part of stabilizer N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, 4.0 parts of magnesium methacrylate, 1.3 parts of stearic acid, 15 parts of white carbon black, 0.5 part of antioxidant RD and 0.5 part of antioxidant 4010 are added into an internal mixer to be internally mixed uniformly at normal temperature, and then the internally mixed rubber block is granulated at low temperature of 50 ℃ by using a single screw to obtain the nitrile rubber composite particles containing unmelted PA6 powder. And (3) dynamically vulcanizing and granulating the composite particles in a double screw with the length-diameter ratio of 60 to obtain the oil-resistant TPV composition particles. The temperature of a melting homogenization section of the double-screw extruder is 210-215 ℃, the temperature of a dynamic vulcanization section is 220-230 ℃, and the temperature of an extrusion molding section is as follows: 210 to 215 ℃.

Comparative example 1

60 parts of NBR rubber, 35 parts of PA6, 13 parts of ABS-g-MAH, 15 parts of TOTM, 1.5 parts of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexyne, 0.7 part of stabilizer N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, 1.5 parts of stearic acid, 15 parts of white carbon black, 0.5 part of antioxidant RD and 0.5 part of antioxidant 4010 are added into an internal mixer to be internally mixed uniformly, and then the internally mixed rubber block is granulated at the low temperature of 50 ℃ by using a single screw to obtain the nitrile rubber composite particles containing the unmelted PA6 powder. And (3) dynamically vulcanizing and granulating the composite particles in a double screw with the length-diameter ratio of 50 to obtain the oil-resistant TPV composition particles. The temperature of a melting homogenization section of the double-screw extruder is 210-215 ℃, the temperature of a dynamic vulcanization section is 220-230 ℃, and the temperature of an extrusion molding section is as follows: 210 to 215 ℃.

Comparative example 2

60 parts of NBR rubber, 35 parts of PA6, 15 parts of TOTM, 1.2 parts of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexyne, 0.7 part of stabilizer N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, 4.0 parts of magnesium methacrylate, 1.3 parts of stearic acid, 15 parts of white carbon black, 0.5 part of antioxidant RD and 0.5 part of antioxidant 4010 are added into an internal mixer to be internally mixed uniformly at normal temperature, and then the rubber blocks which are internally mixed uniformly are granulated at low temperature of 50 ℃ by using a single screw to obtain the nitrile rubber composite particles containing the unmelted PA6 powder. And (3) dynamically vulcanizing and granulating the composite particles in a double screw with the length-diameter ratio of 50 to obtain the oil-resistant TPV composition particles. The temperature of a melting homogenization section of the double-screw extruder is 210-215 ℃, the temperature of a dynamic vulcanization section is 220-230 ℃, and the temperature of an extrusion molding section is as follows: 210 to 215 ℃.

Comparative example 3

60 parts of NBR rubber, 35 parts of PA6, 13 parts of ABS-g-MAH, 15 parts of TOTM, 1.2 parts of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexyne, 4.0 parts of magnesium methacrylate, 1.3 parts of stearic acid, 15 parts of white carbon black, 0.5 part of antioxidant RD and 0.5 part of antioxidant 4010 are added into an internal mixer to be internally mixed uniformly at normal temperature, and then the uniformly internally mixed rubber blocks are granulated at low temperature of 50 ℃ by using a single screw to obtain the nitrile rubber composite particles containing the unmelted PA6 powder. And (3) dynamically vulcanizing and granulating the composite particles in a double screw with the length-diameter ratio of 50 to obtain the oil-resistant TPV composition particles. The temperature of a melting homogenization section of the double-screw extruder is 210-215 ℃, the temperature of a dynamic vulcanization section is 220-230 ℃, and the temperature of an extrusion molding section is as follows: 210 to 215 ℃.

Comparative example 4

60 parts of NBR rubber, 35 parts of PA6, 13 parts of ABS-g-MAH, 15 parts of TOTM, 1.2 parts of tetramethylbutane hydroperoxide, 0.7 part of stabilizer N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, 4.0 parts of magnesium methacrylate, 1.3 parts of stearic acid, 15 parts of white carbon black, 0.5 part of antioxidant RD and 0.5 part of antioxidant 4010 are added into an internal mixer to be internally mixed uniformly, and then the rubber blocks which are internally mixed uniformly are granulated at the low temperature of 50 ℃ by using a single screw to obtain the nitrile rubber composite granules containing the unmelted PA6 powder. And (3) dynamically vulcanizing and granulating the composite particles in a double screw with the length-diameter ratio of 50 to obtain the oil-resistant TPV composition particles. The temperature of a melting homogenization section of the double-screw extruder is 210-215 ℃, the temperature of a dynamic vulcanization section is 220-230 ℃, and the temperature of an extrusion molding section is as follows: 210 to 215 ℃.

Comparative example 5

60 parts of NBR rubber, 35 parts of PA6, 13 parts of ABS-g-MAH, 15 parts of TOTM, 1.2 parts of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexyne, 0.7 part of stabilizer N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, 4.0 parts of magnesium methacrylate, 1.3 parts of stearic acid, 15 parts of white carbon black, 0.5 part of antioxidant RD and 0.5 part of antioxidant 4010 are added into an internal mixer to be internally mixed uniformly at normal temperature, and then the internally mixed rubber block is granulated at low temperature of 50 ℃ by using a single screw to obtain the nitrile rubber composite particles containing unmelted PA6 powder. And (3) dynamically vulcanizing and granulating the composite particles in a double screw with the length-diameter ratio of 30 to obtain the oil-resistant TPV composition particles. The temperature of a melting homogenization section of the double-screw extruder is 210-215 ℃, the temperature of a dynamic vulcanization section is 220-230 ℃, and the temperature of an extrusion molding section is as follows: 210 to 215 ℃.

Comparative example 6

Firstly, 60 parts of NBR rubber, 15 parts of TOTM, 1.2 parts of 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexyne, 4.0 parts of magnesium methacrylate, 1.3 parts of stearic acid, 15 parts of white carbon black, 0.5 part of antioxidant RD and 0.5 part of antioxidant 4010 are added into an internal mixer to be internally mixed uniformly at normal temperature, and the uniformly internally mixed material blocks are granulated in a single screw at 50 ℃ to obtain the composite nitrile rubber particles A. And granulating 35 parts of PA6 and 13 parts of ABS-g-MAH in a double-screw extrusion granulator at 220 ℃ to obtain PA6 composite particles B. And finally, uniformly mixing the composite particles A, B, and dynamically vulcanizing and granulating in a double screw with the length-diameter ratio of 50 to obtain the oil-resistant TPV composition particles. The temperature of a melting homogenization section of the double-screw extruder is 210-215 ℃, the temperature of a dynamic vulcanization section is 220-230 ℃, and the temperature of an extrusion molding section is as follows: 210 to 215 ℃.

TPV particles obtained in examples 1 to 4 and comparative examples 1 to 6 were pressed at 240 ℃ into 2mm sheets to prepare sample sheets, and the tensile properties thereof were tested in accordance with GB/T528-one 2009. According to GB/T1690-2010, TPV sample bars are placed into a mixed oil agent of 93# gasoline and toluene to test the mass swelling ratio, the ratio of the 93# gasoline to the toluene is 3:1, and the test condition is 40 ℃ and 24 hours.

The test results of the TPV bars of examples 1-4 and comparative examples 1-6 are shown in Table 1.

TABLE 1 comparative results of tensile and oil resistance tests of examples 1-4 and comparative examples 1-6

As can be seen from Table 1, the compositions of examples 1 to 4 have good oil resistance and tensile properties as compared with those of comparative examples 1 to 6. The TPV composition is prepared by adopting a one-step high-temperature granulation method, so that the heating history of PA and NBR is reduced, the degradation degree of the material is greatly reduced, and the tensile property and the oil resistance of TPV are improved. The addition of the novel stabilizer N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide can improve the thermal stability of the nylon 6/NBR in the high-temperature dynamic vulcanization twin-screw with large length-diameter ratio, thereby improving the tensile property and the oil resistance of the TPV. The ABS-g-MAH can improve the interfacial compatibility of the PA6 and the NBR, thereby improving the tensile property and the oil resistance of the TPV. The 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexyne and magnesium methacrylate compounded vulcanization system can ensure the processing fluidity of PA6/NBR in a melting plasticizing section of a screw rod and can also ensure that NBR particles dispersed in a plastic phase PA6 can quickly complete vulcanization crosslinking reaction in a dynamic vulcanization section, thereby ensuring the excellent processing property, tensile property and oil resistance of PA6/NBR TPV.

Of course, the foregoing is only a preferred embodiment of the invention and should not be taken as limiting the scope of the embodiments of the invention. The present invention is not limited to the above examples, and equivalent changes and modifications made by those skilled in the art within the spirit and scope of the present invention should be construed as being included in the scope of the present invention.