Thermoplastic vulcanized rubber composition, thermoplastic vulcanized rubber and preparation method and application thereof

Abstract

The invention relates to the field of thermoplastic elastomers, and discloses a thermoplastic vulcanized rubber composition, thermoplastic vulcanized rubber and a preparation method and application thereof. The composition comprises the following components: nitrile rubber, nylon, tannic acid, a vulcanizing agent, a vulcanizing aid, an anti-aging agent, an antioxidant and a stabilizer. According to the invention, tannic acid with a specific ratio is introduced into a nitrile rubber and nylon blending system, and compounding agents such as the vulcanizing agent, the vulcanizing aid, the anti-aging agent, the antioxidant and the stabilizer are synergistically compounded, so that the oil resistance of the original dynamically vulcanized nitrile rubber / nylon elastomer is further improved under the condition of ensuring excellent processability and mechanical property, and the service life of the elastomer is prolonged. The thermoplastic vulcanized rubber with excellent comprehensive performance is obtained, and meanwhile, the use amount of compounding agents such as an antioxidant and an anti-aging agent in an elastomer blend can be reduced by introducing tannic acid, so that the material cost is reduced.

Description

technical field

[0001] The invention relates to the field of thermoplastic elastomers, in particular to a thermoplastic vulcanized rubber composition, thermoplastic vulcanized rubber, and a preparation method and application thereof. Background technique

[0002] The melt of thermoplastic vulcanizate (TPV) is a non-Newtonian fluid. As a substitute for traditional vulcanized rubber, thermoplastic vulcanizate can be processed by using resin processing equipment under a wide range of process conditions and using a variety of molding processes. At the same time, due to the advantages of low energy consumption, repeatable processing, and good product stability, thermoplastic vulcanizate has been widely used in the automotive field.

[0003] In the research and development of temperature-resistant and oil-resistant TPV, the dynamic vulcanization system of nitrile rubber / nylon (NBR / PA) has the most potential to realize the replacement and weight reduction of vulcanized rubber in au...

Examples

Embodiment approach

[0031] According to a preferred embodiment of the present invention, the operation of sequentially kneading and vulcanizing each component in the thermoplastic vulcanizate composition comprises the following steps:

[0032] (1) Nitrile rubber, nylon, tannin, anti-aging agent, antioxidant and stabilizer are carried out the first mixing, obtain masterbatch;

[0033] (2) Extruding and granulating the master batch I to obtain master batch particles;

[0034] (3) Perform dynamic vulcanization and extrusion granulation II on the masterbatch particles, vulcanizing agent and vulcanization aid.

[0035] The amount of each component involved in the second aspect of the present invention is the same as that of the corresponding components described in the first aspect of the present invention, and will not be repeated here, and those skilled in the art should not understand it as a limitation of the present invention.

[0036] Preferably, the conditions for the first mixing include: the...

Embodiment 1

[0062] This example is used to illustrate that the thermoplastic vulcanizate composition of the present invention is prepared according to the formula and process parameters in Table 1, and the thermoplastic vulcanizate is prepared according to the following method.

[0063] The method for preparing thermoplastic vulcanizate comprises the following steps:

[0064] (1) Under the condition that the rotor speed of the internal mixer is 60rpm and the temperature is 150°C, the nitrile rubber, nylon 6 powder, tannin, anti-aging agent, antioxidant and stabilizer are mixed for the first time, and fully mixed 7min, the masterbatch was obtained and the sheets were evenly lowered;

[0065] (2) After the masterbatch rubber sheet is cooled to room temperature, the screw speed is 130rpm, and the extrusion temperature is 220°C, and extrusion granulation I is carried out in a single-screw extruder to obtain the masterbatch rubber particles;

[0066] (3) When the screw speed is 200rpm and the...

Embodiment 8

[0069] In this example, a thermoplastic vulcanizate was prepared using a formula and method similar to that of Example 1, except that the parameters of the dynamic vulcanization process were different, see Table 1 for details.

technical field

[0001] The invention relates to the field of thermoplastic elastomers, in particular to a thermoplastic vulcanized rubber composition, thermoplastic vulcanized rubber, and a preparation method and application thereof. Background technique

[0002] The melt of thermoplastic vulcanizate (TPV) is a non-Newtonian fluid. As a substitute for traditional vulcanized rubber, thermoplastic vulcanizate can be processed by using resin processing equipment under a wide range of process conditions and using a variety of molding processes. At the same time, due to the advantages of low energy consumption, repeatable processing, and good product stability, thermoplastic vulcanizate has been widely used in the automotive field.

[0003] In the research and development of temperature-resistant and oil-resistant TPV, the dynamic vulcanization system of nitrile rubber / nylon (NBR / PA) has the most potential to realize the replacement and weight reduction of vulcanized rubber in au...

Examples

Embodiment approach

[0031] According to a preferred embodiment of the present invention, the operation of sequentially kneading and vulcanizing each component in the thermoplastic vulcanizate composition comprises the following steps:

[0032] (1) Nitrile rubber, nylon, tannin, anti-aging agent, antioxidant and stabilizer are carried out the first mixing, obtain masterbatch;

[0033] (2) Extruding and granulating the master batch I to obtain master batch particles;

[0034] (3) Perform dynamic vulcanization and extrusion granulation II on the masterbatch particles, vulcanizing agent and vulcanization aid.

[0035] The amount of each component involved in the second aspect of the present invention is the same as that of the corresponding components described in the first aspect of the present invention, and will not be repeated here, and those skilled in the art should not understand it as a limitation of the present invention.

[0036] Preferably, the conditions for the first mixing include: the...

Embodiment 1

[0062] This example is used to illustrate that the thermoplastic vulcanizate composition of the present invention is prepared according to the formula and process parameters in Table 1, and the thermoplastic vulcanizate is prepared according to the following method.

[0063] The method for preparing thermoplastic vulcanizate comprises the following steps:

[0064] (1) Under the condition that the rotor speed of the internal mixer is 60rpm and the temperature is 150°C, the nitrile rubber, nylon 6 powder, tannin, anti-aging agent, antioxidant and stabilizer are mixed for the first time, and fully mixed 7min, the masterbatch was obtained and the sheets were evenly lowered;

[0065] (2) After the masterbatch rubber sheet is cooled to room temperature, the screw speed is 130rpm, and the extrusion temperature is 220°C, and extrusion granulation I is carried out in a single-screw extruder to obtain the masterbatch rubber particles;

[0066] (3) When the screw speed is 200rpm and the...

Embodiment 8

[0069] In this example, a thermoplastic vulcanizate was prepared using a formula and method similar to that of Example 1, except that the parameters of the dynamic vulcanization process were different, see Table 1 for details.

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