A low-heat-generating, dynamic-property-stable rubber composition, and a processing method and application thereof

Abstract

The application discloses a low-heat-generating rubber composition with stable dynamic performance, and a processing method and application thereof. The rubber composition comprises 100 parts of modified environment-friendly constant-viscosity natural rubber, 18-50 parts of furnace carbon black, 2-3 parts of vulcanizing agent, 1-3 parts of accelerator, 6-10 parts of antioxidant, 6-10 parts of active agent and 1-4 parts of uniformizing agent. The modified environment-friendly constant-viscosity natural rubber is modified fermented constant-Mooney natural rubber. The rubber composition prepared by the application has a compression heat generation of not more than 25 DEG C, an increase of static stiffness of less than or equal to 20 N / mm, and a dynamic stiffness change value of less than or equal to 50 N / mm. The application solves the problems of unstable static stiffness and dynamic stiffness of damping products produced by ordinary natural rubber and tobacco sheet rubber with time, and solves the problem of odor in the production process of fermented constant-viscosity natural rubber, and the application is safe, environment-friendly and capable of guaranteeing stable product performance.

Description

Technical Field

[0001] This invention belongs to the field of rubber material technology, specifically relating to a rubber composition with low heat generation and stable dynamic properties, its processing method, and its application. Background Technology

[0002] When manufacturing natural rubber (NR) using latex, some non-rubber hydrocarbon components remain in the solid NR. Generally, solid natural rubber contains 92%–95% rubber hydrocarbons, 5%–8% non-rubber hydrocarbons, and 2.0%–3.0% protein. Nitrogen in rubber is mainly found in protein compounds, accounting for approximately 16% of the protein's weight. Its decomposition products promote rubber vulcanization and prevent oxidation, acting as natural vulcanizing agents and antioxidants. However, proteins also have strong hygroscopic properties; rubber with high protein content is prone to moisture absorption and mold growth. More importantly, rubber with high protein content generates a lot of heat and has poor dynamic properties. During storage and transportation, the aldehyde groups in ordinary NR molecules undergo intermolecular dehydration condensation, leading to an increase in Mooney temperature, increasing instability in the formulation and manufacturing process, and affecting product quality.

[0003] With the development of the automotive industry, the requirements for vehicle comfort, durability, and stability are becoming increasingly stringent. Automotive vibration damping rubber components play a crucial role in these aspects. The low dynamic-to-static ratio of rubber materials can more quickly and effectively mitigate the adverse effects of various harmful vibrations and noises. This places increasingly higher demands on rubber vibration damping components and materials. Vibration damping products made from ordinary natural rubber and smoked sheet rubber experience an increase in both static and dynamic stiffness over time, affecting product performance.

[0004] For the reasons mentioned above, many shock absorber manufacturers use PVC to replace ordinary natural rubber and smoked sheet rubber in their shock absorber products. For example, PVC from Malaysia is mainly used by mid-to-high-end automotive shock absorber customers. However, since PVC from Malaysia is a fermented natural rubber, the odor of fermented natural rubber is becoming increasingly unacceptable due to increasingly stringent environmental requirements. It is necessary to ensure both the dynamic performance stability of shock absorber products and environmental safety. Summary of the Invention

[0005] To address the problem that existing rubber materials struggle to simultaneously achieve environmentally friendly odor, dynamic performance stability, and low heat generation, this invention provides a low-heat-generating, dynamically stable rubber composition, its processing method, and its application. This solves both the problems of unstable static and dynamic stiffness and the odor issue during the production of fermented, constant-viscosity natural rubber, thus meeting the technical requirements for rubber materials used in shock-absorbing products.

[0006] This invention is achieved through the following technical solution:

[0007] A rubber composition with low heat generation and stable dynamic properties comprises the following components in parts by weight: 100 parts of modified environmentally friendly constant-tack natural rubber, 18-50 parts of furnace black, 2-3 parts of vulcanizing agent, 1-3 parts of accelerator, 6-10 parts of antioxidant, 6-10 parts of activator, and 1-4 parts of homogenizer.

[0008] The modified environmentally friendly constant-tack natural rubber is a modified fermented Hengmoney natural rubber.

[0009] Furthermore, the preparation method of the modified environmentally friendly constant-tack natural rubber is as follows:

[0010] (1) Dissolve fermented natural rubber blocks in cyclohexane, heat to 30-40°C, and stir for 2-4 hours to form a natural rubber solution;

[0011] (2) Add activated carbon and citric acid to the natural rubber solution, stir at room temperature for 2-5 hours, and dry to obtain modified environmentally friendly constant viscosity natural rubber.

[0012] Furthermore, the amount of activated carbon added is 1-3% of the mass of the fermented Mooney natural rubber, and the amount of citric acid added is 0.2-1% of the mass of the fermented Mooney natural rubber.

[0013] Furthermore, the furnace black is Cabot Carbon Black SP5000 or Cabot Carbon Black SP6000.

[0014] Furthermore, the vulcanizing agent is vulcanizing masterbatch particles; the accelerator is a composition of hypoflavin accelerator and thiazole accelerator or thiuram accelerator, wherein the mass ratio of hypoflavin accelerator to thiazole accelerator or thiuram accelerator is 3~5:1.

[0015] Further, the hypoflavin accelerator is N-cyclohexyl-2-benzothiazole hypoflavin accelerator or N-oxodiethyl-2-benzothiazole hypoflavin accelerator; the thiazole accelerator is 2-thiol benzothiazole or benzothiazole disulfide; and the thiuram accelerator is tetramethylthiuram monosulfide or tetramethylthiuram disulfide.

[0016] Furthermore, the antioxidant is a composition of microcrystalline wax, 2,2,4-trimethyl-1,2-dihydroquinoline polymer, N-(1,3-dimethyl)butyl-N'-phenyl-p-phenylenediamine, and N-cyclohexyl-N'-phenyl-p-phenylenediamine in a mass ratio of 6:4:3:3; the activator is a composition of zinc oxide and stearic acid in a mass ratio of 5~6.25:2, wherein the zinc oxide is indirect zinc oxide, active zinc oxide, or zinc oxide masterbatch; and the homogenizer is a polymer of unsaturated hydrocarbons.

[0017] Furthermore, the carrier of the zinc oxide masterbatch is natural rubber, with an effective content of not less than 80%.

[0018] The processing method of the low-heat-generating, dynamically stable rubber composition of the present invention includes the following steps:

[0019] (1) Feeding temperature 80℃, put the modified environmentally friendly constant viscosity natural rubber into the internal mixer, automatically pressurize and internally mix, after 1 minute add activator, antioxidant and homogenizer, automatically pressurize and internally mix, after 2 minutes add furnace carbon black, automatically pressurize and internally mix; after 4 minutes sweep the material, automatically pressurize and internally mix; after 2 minutes discharge the rubber, the discharge temperature is 140℃; (2) Open milling and sheeting: process the first stage of the open mill, set the roller gap to 2mm, the roller temperature to 60℃, thin pass three times; turn on the electric fan, set the roller gap to 6mm, pound the rubber for 2 minutes; set the roller gap to 8mm, and sheet out;

[0020] (3) Parking: After filming, park for 8-24 hours.

[0021] (4) Vulcanization and extrusion: The two-stage processing of the open mill is carried out with a roller gap of 6 mm and a roller temperature of 60℃ for 2 min. The electric fan is turned on and the roller gap is adjusted to 2 mm. The material is passed through once, vulcanizing agent and accelerator are added, and the material is turned over and cut 3 times. The material is swept, turned over, and cut 2 times. The electric fan is turned on and the rubber is pounded for 2 min. The electric fan is turned on and the roller gap is adjusted to 2 mm. The material is passed through 3 times. The roller gap is adjusted to 10 mm and the strip is extruded to obtain a rubber composition with stable heat generation and dynamic properties.

[0022] In this invention, the low-heat-generating, dynamically stable rubber composition is used in rubber materials for shock-absorbing products.

[0023] The beneficial effects achieved by this invention are as follows:

[0024] (1) This invention modifies constant viscosity natural rubber, removes the odor after protein fermentation, produces less heat in the rubber product, increases the product's dynamic fatigue resistance, and has no odor, which meets the national requirements for developing high-performance rubber.

[0025] (2) The present invention uses Cabot's very clean high-structure low-surface-area carbon black, which has excellent dispersibility, can produce a high level of mixing efficiency, shorten the mixing cycle, has good dimensional stability, and improves the dynamic fatigue performance of the rubber compound.

[0026] (3) The present invention provides a rubber composition with low heat generation and more stable dynamic performance. The resulting rubber composition has a compression heat generation (GB / T 1687.3) of no more than 25°C, an increase in static stiffness of ≤20N / mm, and a change in dynamic stiffness of ≤50N / mm. It solves the problem of unstable static and dynamic stiffness of shock-absorbing products made from ordinary natural rubber and smoked sheet rubber over time, and also solves the problem of odor in the production process of fermented constant viscosity natural rubber. It is safe and environmentally friendly and can ensure stable product performance. Detailed Implementation

[0027] The following examples further illustrate the above-described content of the present invention, but it should not be construed as limiting the scope of the subject matter of the present invention to the following examples. All technologies implemented based on the above-described content of the present invention fall within the scope of the present invention.

[0028] The quantities mentioned in the following examples are by weight.

[0029] Example 1

[0030] A rubber composition with low heat generation and stable dynamic properties comprises 100 parts of modified environmentally friendly constant-tack natural rubber, 20 parts of furnace black (Cabot SP5000), 2 parts of vulcanizing agent (sulfur masterbatch particles), 1 part of accelerator (0.8 parts of N-oxodiethylene-2-benzothiazole hypoflavinamide and 0.2 parts of tetramethylthiuram disulfide), 8 parts of antioxidant (3 parts of microcrystalline wax, 2 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 1.5 parts of N-(1,3-dimethyl)butyl-N'-phenyl-p-phenylenediamine and 1.5 parts of N-cyclohexyl-N'-phenyl-p-phenylenediamine), 8.25 parts of activator (6.25 parts of zinc oxide masterbatch particles and 2 parts of stearic acid), and 1 part of homogenizer (polymer of unsaturated hydrocarbons).

[0031] The preparation method of the modified environmentally friendly constant-tack natural rubber is as follows:

[0032] 1) Dissolve fermented Hengmoney natural rubber blocks in cyclohexane, heat to 40°C, and stir while heating for 3 hours to form a natural rubber solution;

[0033] 2) Step 1) Add 2 parts activated carbon and 1 part citric acid to the natural rubber solution, stir at room temperature for 3 hours, and then dry to obtain modified environmentally friendly constant viscosity natural rubber.

[0034] The processing method for rubber compositions with low heat generation and stable dynamic properties is as follows:

[0035] (1) The feeding temperature is 80℃. The modified environmentally friendly constant viscosity natural rubber is put into the internal mixer and automatically pressurized and internally mixed. After 1 minute, the activator, antioxidant and homogenizer are added and automatically pressurized and internally mixed. After 2 minutes, furnace carbon black is added and automatically pressurized and internally mixed. After 4 minutes, the material is swept and automatically pressurized and internally mixed. After 2 minutes, the rubber is discharged at a temperature of 140℃.

[0036] (2) Open mill sheeting: Process one section of the open mill, set the roller gap to 2mm, the roller temperature to 60℃, and pass through the thin mill three times; turn on the electric fan, set the roller gap to 6mm, and pound the glue for 2min; set the roller gap to 8mm and sheet out;

[0037] (3) Parking: After filming, park for 8-24 hours.

[0038] (4) Vulcanization and extrusion: The two-stage processing of the open mill is carried out with a roller gap of 6 mm and a roller temperature of 60℃ for 2 min. The electric fan is turned on and the roller gap is adjusted to 2 mm. The material is passed through once, vulcanizing agent and accelerator are added, and the material is turned over and cut 3 times. The material is swept, turned over, and cut 2 times. The electric fan is turned on and the rubber is pounded for 2 min. The electric fan is turned on and the roller gap is adjusted to 2 mm. The material is passed through 3 times. The roller gap is adjusted to 10 mm and the strip is extruded to obtain a rubber composition with stable heat generation and dynamic properties.

[0039] Example 2

[0040] A rubber composition with low heat generation and stable dynamic properties comprises 100 parts of modified environmentally friendly constant-tack natural rubber, 50 parts of furnace black (Cabot SP5000), 2.5 parts of vulcanizing agent (sulfur masterbatch particles), 1 part of accelerator (0.8 parts of N-oxodiethylene-2-benzothiazolium hypoflavinamide, 0.2 parts of tetramethylthiuram disulfide), 8 parts of antioxidant (3 parts of microcrystalline wax, 2 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 1.5 parts of N-(1,3-dimethyl)butyl-N'-phenyl-p-phenylenediamine, 1.5 parts of N-cyclohexyl-N'-phenyl-p-phenylenediamine), 8.25 parts of activator (6.25 parts of zinc oxide masterbatch particles, 2 parts of stearic acid), and 3 parts of homogenizer (polymer of unsaturated hydrocarbons).

[0041] The preparation method of the modified environmentally friendly constant-tack natural rubber is as follows:

[0042] 1) Dissolve fermented Hengmoney natural rubber blocks in cyclohexane, heat to 30°C, and stir while heating for 4 hours to form a natural rubber solution;

[0043] 2) In step 1), add 3 parts activated carbon and 0.2 parts citric acid to the natural rubber solution, stir at room temperature for 2 hours, and then dry to obtain modified environmentally friendly constant viscosity natural rubber.

[0044] The processing method of the low heat generation and dynamically stable rubber composition is the same as that in Example 1.

[0045] Example 3

[0046] A rubber composition with low heat generation and stable dynamic properties comprises 100 parts of modified environmentally friendly constant-tack natural rubber, 30 parts of furnace black (Cabot SP5000), 2.5 parts of vulcanizing agent (sulfur masterbatch particles), 1 part of accelerator (0.8 parts of N-oxodiethylene-2-benzothiazolium hypoflavinamide and 0.2 parts of tetramethylthiuram disulfide), 8 parts of antioxidant (3 parts of microcrystalline wax, 2 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 1.5 parts of N-(1,3-dimethyl)butyl-N'-phenyl-p-phenylenediamine and 1.5 parts of N-cyclohexyl-N'-phenyl-p-phenylenediamine), 7 parts of activator (5 parts of zinc oxide masterbatch particles and 2 parts of stearic acid), and 3 parts of homogenizer (polymer of unsaturated hydrocarbons).

[0047] The preparation method of the modified environmentally friendly constant-tack natural rubber is as follows:

[0048] 1) Dissolve fermented Hengmoney natural rubber blocks in cyclohexane, heat to 40°C, and stir while heating for 3 hours to form a natural rubber solution;

[0049] 2) In step 1), add 3 parts activated carbon and 0.2 parts citric acid to the natural rubber solution, stir at room temperature for 2 hours, and then dry to obtain modified environmentally friendly constant viscosity natural rubber.

[0050] The processing method of the low heat generation and dynamically stable rubber composition is the same as that in Example 1.

[0051] Example 4

[0052] A rubber composition with low heat generation and stable dynamic properties comprises 100 parts of modified environmentally friendly constant-tack natural rubber, 38.2 parts of furnace black (Cabot SP5000), 2.5 parts of vulcanizing agent (sulfur masterbatch particles), 1 part of accelerator (0.6 parts of N-oxodiethylene-2-benzothiazolium hypoflavinamide and 0.4 parts of tetramethylthiuram disulfide), 8 parts of antioxidant (3 parts of microcrystalline wax, 2 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 1.5 parts of N-(1,3-dimethyl)butyl-N'-phenyl-p-phenylenediamine and 1.5 parts of N-cyclohexyl-N'-phenyl-p-phenylenediamine), 7 parts of activator (5 parts of zinc oxide masterbatch particles and 2 parts of stearic acid), and 1 part of homogenizer (polymer of unsaturated hydrocarbons).

[0053] The preparation method of the modified environmentally friendly constant-tack natural rubber is as follows:

[0054] 1) Dissolve fermented Hengmoney natural rubber blocks in cyclohexane, heat to 35°C, and stir while heating for 3 hours to form a natural rubber solution;

[0055] 2) Step 1) Add 3 parts activated carbon and 1 part citric acid to the natural rubber solution, stir at room temperature for 5 hours, and then dry to obtain modified environmentally friendly constant viscosity natural rubber.

[0056] The processing method of the low heat generation and dynamically stable rubber composition is the same as that in Example 1.

[0057] Example 5

[0058] A rubber composition with low heat generation and stable dynamic properties comprises 100 parts of modified environmentally friendly constant-tack natural rubber, 44 parts of furnace black (Cabot SP5000), 2.5 parts of vulcanizing agent (sulfur masterbatch particles), 1 part of accelerator (0.6 parts of N-oxodiethylene-2-benzothiazolium hypoflavinamide and 0.4 parts of tetramethylthiuram disulfide), 8 parts of antioxidant (3 parts of microcrystalline wax, 2 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 1.5 parts of N-(1,3-dimethyl)butyl-N'-phenyl-p-phenylenediamine and 1.5 parts of N-cyclohexyl-N'-phenyl-p-phenylenediamine), 8.25 parts of activator (6.25 parts of zinc oxide masterbatch particles and 2 parts of stearic acid), and 3 parts of homogenizer (polymer of unsaturated hydrocarbons).

[0059] The preparation method of the modified environmentally friendly constant-tack natural rubber is as follows:

[0060] 1) Dissolve fermented Hengmoney natural rubber blocks in cyclohexane, heat to 32°C, and stir while heating for 4 hours to form a natural rubber solution;

[0061] 2) In step 1), add 2 parts activated carbon and 1 part citric acid to the natural rubber solution, stir at room temperature for 5 hours, and then dry to obtain modified environmentally friendly constant viscosity natural rubber.

[0062] The processing method of the low heat generation and dynamically stable rubber composition is the same as that in Example 1.

[0063] Comparative Example 1

[0064] A rubber composition comprising 100 parts of standard rubber No. 5, 44 parts of carbon black (N774), 2.5 parts of vulcanizing agent (sulfur masterbatch particles), 1 part of accelerator (0.6 parts of N-oxodiethylene-2-benzothiazole hypoflavinamide, 0.4 parts of tetramethylthiuram disulfide), 8 parts of antioxidant (3 parts of microcrystalline wax, 2 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 1.5 parts of N-(1,3-dimethyl)butyl-N'-phenyl-p-phenylenediamine, 1.5 parts of N-cyclohexyl-N'-phenyl-p-phenylenediamine), 8.25 parts of activator (6.25 parts of zinc oxide masterbatch particles, 2 parts of stearic acid), and 3 parts of homogenizer (polymer of unsaturated hydrocarbons).

[0065] The processing method of the rubber composition is the same as that of the low heat generation and dynamically stable rubber composition of Example 1.

[0066] Comparative Example 2

[0067] A rubber composition comprising 100 parts of No. 3 smoked sheet rubber, 44 parts of carbon black (N774), 2.5 parts of vulcanizing agent (sulfur masterbatch particles), 1 part of accelerator (0.6 parts of N-oxodiethyl-2-benzothiazole hypoflavinamide, 0.4 parts of tetramethylthiuram disulfide), 8 parts of antioxidant (3 parts of microcrystalline wax, 2 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 1.5 parts of N-(1,3-dimethyl)butyl-N'-phenyl-p-phenylenediamine, 1.5 parts of N-cyclohexyl-N'-phenyl-p-phenylenediamine), 8.25 parts of activator (6.25 parts of zinc oxide masterbatch particles, 2 parts of stearic acid), and 3 parts of homogenizer (polymer of unsaturated hydrocarbons).

[0068] The processing method of the rubber composition is the same as that of the low heat generation and dynamically stable rubber composition of Example 1.

[0069] Comparative Example 3

[0070] A rubber composition comprising 100 parts of fermented Homunculus natural rubber, 44 parts of carbon black (N774), 2.5 parts of vulcanizing agent (sulfur masterbatch particles), 1 part of accelerator (0.6 parts of N-oxodiethylene-2-benzothiazolium hypoflavinamide and 0.4 parts of tetramethylthiuram disulfide), 8 parts of antioxidant (3 parts of microcrystalline wax, 2 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 1.5 parts of N-(1,3-dimethyl)butyl-N'-phenyl-p-phenylenediamine and 1.5 parts of N-cyclohexyl-N'-phenyl-p-phenylenediamine), 8.25 parts of activator (6.25 parts of zinc oxide masterbatch particles and 2 parts of stearic acid), and 3 parts of homogenizer (polymer of unsaturated hydrocarbons).

[0071] The processing method of the rubber composition is the same as that of the low heat generation and dynamically stable rubber composition of Example 1.

[0072] Example of effect:

[0073] The compression fatigue temperature rise (°C), static stiffness increase (N / mm) over 6 months, and dynamic stiffness increase (N / mm) over 6 months of the low heat generation and dynamic performance stable rubber compositions processed in Examples 1-5 and the rubber compositions processed in Comparative Examples 1-3 were tested. The results are shown in Table 1 below:

[0074] Compression fatigue temperature rise was tested in accordance with GB / T 1687.3 Determination of temperature rise and fatigue resistance of vulcanized rubber in flexural test - Part 3: Compression flexural test (constant strain type);

[0075] Static stiffness test:

[0076] First, pre-compress three times at a speed of 10 mm / min, with a compression amount of not less than 10 mm. Then, perform a fourth compression at a speed of 10 mm / min. Take the load-deformation curve of the fourth compression, which is in the 1000~4000N pressure range, and perform static stiffness numerical calculation.

[0077] Dynamic stiffness test:

[0078] The dynamic stiffness was tested by applying a preload of 2000N, an amplitude of ±0.2mm, and a frequency of 25Hz.

[0079] Table 1. Performance Test Table of Rubber Compositions

[0080]

[0081] As shown in Table 1, the compression heat of the obtained rubber composition (GB / T 1687.3) is no greater than 25℃, the increase in static stiffness is ≤20N / mm, and the change in dynamic stiffness is ≤50mm. This solves the problem of unstable static and dynamic stiffness in shock-absorbing components made from ordinary natural rubber and smoked sheet rubber over time, and also addresses the odor issue during the production of fermented constant-viscosity natural rubber. It is both safe and environmentally friendly, while ensuring stable product performance.

Claims

1. A rubber composition with low heat generation and stable dynamic properties, characterized in that, It includes the following components by weight: 100 parts of modified environmentally friendly constant-tack natural rubber, 18-50 parts of furnace black, 2-3 parts of vulcanizing agent, 1-3 parts of accelerator, 6-10 parts of antioxidant, 6-10 parts of activator, and 1-4 parts of homogenizer. The modified environmentally friendly constant-tack natural rubber is a modified fermented Homunculus natural rubber; The furnace black mentioned is Cabot Carbon Black SP5000 or Cabot Carbon Black SP6000; The preparation method of the modified environmentally friendly constant-tack natural rubber is as follows: (1) Dissolve fermented natural rubber blocks in cyclohexane, heat to 30-40°C, and stir for 2-4 hours to form a natural rubber solution; (2) Add activated carbon and citric acid to the natural rubber solution, stir at room temperature for 2-5 hours, and dry to obtain modified environmentally friendly constant viscosity natural rubber; The amount of activated carbon added is 1-3% of the mass of the fermented Mooney natural rubber, and the amount of citric acid added is 0.2-1% of the mass of the fermented Mooney natural rubber.

2. The low-heat-generating, dynamically stable rubber composition according to claim 1, characterized in that, The vulcanizing agent is vulcanizing masterbatch particles; the accelerator is a combination of hypoflavin accelerator and thiazole accelerator or thiuram accelerator, wherein the mass ratio of hypoflavin accelerator to thiazole accelerator or thiuram accelerator is 3~5:

1.

3. The low-heat-generating, dynamically stable rubber composition according to claim 2, characterized in that, The hypoflavin accelerator is N-cyclohexyl-2-benzothiazole hypoflavin or N-oxodiethyl-2-benzothiazole hypoflavin; the thiazole accelerator is 2-thiol benzothiazole or benzothiazole disulfide; the thiuram accelerator is tetramethylthiuram monosulfide or tetramethylthiuram disulfide.

4. The low-heat-generating, dynamically stable rubber composition according to claim 1, characterized in that, The antioxidant is a composition of microcrystalline wax, 2,2,4-trimethyl-1,2-dihydroquinoline polymer, N-(1,3-dimethyl)butyl-N'-phenyl-p-phenylenediamine, and N-cyclohexyl-N'-phenyl-p-phenylenediamine in a mass ratio of 6:4:3:3; the activator is a composition of zinc oxide and stearic acid in a mass ratio of 5~6.25:2, wherein the zinc oxide is indirect zinc oxide, active zinc oxide, or zinc oxide masterbatch; and the homogenizer is a polymer of unsaturated hydrocarbons.

5. The low-heat-generating, dynamically stable rubber composition according to claim 4, characterized in that, The carrier of the zinc oxide masterbatch is natural rubber, with an effective content of not less than 80%.

6. A method for processing a rubber composition with low heat generation and stable dynamic properties as described in any one of claims 1 to 5, characterized in that, Includes the following steps: (1) The feeding temperature is 80℃. The modified environmentally friendly constant viscosity natural rubber is put into the internal mixer and automatically pressurized and internally mixed. After 1 minute, the activator, antioxidant and homogenizer are added and automatically pressurized and internally mixed. After 2 minutes, furnace carbon black is added and automatically pressurized and internally mixed. After 4 minutes, the material is swept and automatically pressurized and internally mixed. After 2 minutes, the rubber is discharged at a temperature of 140℃. (2) Open mill sheeting: Process one section of the open mill, set the roller gap to 2mm, the roller temperature to 60℃, and pass through the thin mill three times; turn on the electric fan, set the roller gap to 6mm, and pound the glue for 2min; set the roller gap to 8mm and sheet out; (3) Storage: Store for 8-24 hours after film output; (4) Vulcanization and extrusion: The two-stage processing of the open mill is carried out with a roller gap of 6 mm and a roller temperature of 60℃ for 2 min. The electric fan is turned on and the roller gap is adjusted to 2 mm. The material is passed through once, vulcanizing agent and accelerator are added, and the material is turned over and cut 3 times. The material is swept, turned over, and cut 2 times. The electric fan is turned on and the rubber is pounded for 2 min. The electric fan is turned on and the roller gap is adjusted to 2 mm. The material is passed through 3 times. The roller gap is adjusted to 10 mm and the strip is extruded to obtain a rubber composition with stable heat generation and dynamic properties.

7. The use of a low-heat-generating, dynamically stable rubber composition according to any one of claims 1 to 5 in rubber materials for shock-absorbing products.

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