Automobile rear shock absorber upper support rubber material and preparation method thereof

Abstract

The invention discloses an automobile rear shock absorber upper support rubber material and a preparation method thereof, and belongs to the technical field of rubber. The rubber material comprises the following components: natural rubber, butadiene rubber, white carbon black, carbon black N762, activated zinc oxide, octadecyl acrylate, an active agent ZEH-DL, an anti-aging agent, a solid Si-69, an anti-reversion agent PK-900, a vulcanizing agent S-80, an accelerant and an anti-fatigue agent PL-600. The automobile rear shock absorber upper support rubber material provided by the invention has the advantages of high tensile strength, high tearing strength, good heat resistance, excellent high-temperature pressure change performance, low hardness change after aging, high strength retention rate and the like; the engine shock absorber upper support made of the rubber material is low in dynamic-static ratio and good in durability, and is in the leading level in the industry.

Description

TECHNICAL FIELD

[0001] The application relates to a rubber material for an upper support of a rear shock absorber of an automobile and a preparation method thereof. BACKGROUND

[0002] The upper support of a rear shock absorber of an automobile engine is used to reduce the shock generated by the impact from the road surface on the automobile, and the vibration generated by the road surface and the wheels is reduced through rubber damping to prevent the vibration from being transmitted to the vehicle body through the chassis to make the people in the vehicle uncomfortable. The upper support of the shock absorber is used for support, installation of the automobile engine and its components and assemblies, and forms the overall modeling of the automobile, and also cooperates with other components to ensure the stability of the automobile. If the upper support of the shock absorber has a problem, the comfort of the people in the vehicle will be reduced, and more seriously, the safety hazard may be caused by the breakage.

[0003] The rubber material is widely used in the fields of damping, sealing and noise reduction due to its excellent elasticity, wear resistance and damping performance. However, the traditional rubber material often shows a high dynamic-static ratio under dynamic load, and this defect limits its application in the scene. For example, in the automobile suspension system, the high dynamic-static ratio will cause the material to generate hysteresis loss, uneven energy dissipation and other problems under frequent dynamic deformation, thereby affecting the stability and service life of the equipment. However, with the rapid expansion and development of the domestic automobile industry, automobile products pay more and more attention to the experience of the people in the vehicle. SUMMARY

[0004] To solve the above problems, the application provides a rubber material for an upper support of a rear shock absorber of an automobile and a preparation method thereof. In order to meet the more stringent requirements of domestic and foreign customers and provide better comfort and safety, a rubber material for an upper support of a rear shock absorber of an automobile engine with low dynamic-static ratio and good durability is provided.

[0005] The application provides a rubber material for an upper support of a rear shock absorber of an automobile and a preparation method thereof, which adopts the following technical scheme: In one aspect of the application, a rubber material for an upper support of a rear shock absorber of an automobile comprises the following components in parts by weight: natural rubber 90-100 parts; butadiene rubber 0-10 parts; white carbon black 7.5-8 parts; carbon black N762 15-19 parts; active zinc oxide 8 parts; octadecyl acrylate 0.5 parts; active agent ZEH-DL 3.5 parts; anti-aging agent ANTIWAX 6268 3 parts; anti-aging agent 4010NA 2 parts; anti-aging agent SNR 1.5 parts; anti-aging agent OCTAMINE 1 part; solid Si-69 1-1.5 parts; anti-reversion agent PK-900 2.5 parts; vulcanizing agent S-80 1.4-1.6 parts; accelerator DM 0-0.3 parts; accelerator DTDM 0-0.7 parts; accelerator TBTD 1.2-1.8 parts; accelerator CZ 1.2 parts; anti-fatigue agent PL-600 3 parts; The rubber material is used for manufacturing an automobile rear shock absorber upper support with low dynamic-static ratio and good durability.

[0006] Preferably, the natural rubber is SVR-3L natural rubber.

[0007] Preferably, the butadiene rubber is BR9000 butadiene rubber.

[0008] Preferably, the white carbon black is HCSIL-822MP white carbon black.

[0009] The application selects SVR-3L natural rubber, which has good elasticity, wear resistance and aging resistance of natural rubber, and the advantages of oil resistance and high temperature resistance of synthetic rubber; BR9000 butadiene rubber has high tensile strength and elongation at break, and can maintain good strength and ductility when stressed; in order to prepare the automobile rear shock absorber upper support, the rubber material obtained by blending the two rubbers with various additives maintains low dynamic-static ratio and good durability.

[0010] In another aspect of the application, a preparation method of a rubber material for an automobile rear shock absorber upper support is provided, comprising the following steps: Step 1) one-stage mixing: plasticize the natural rubber or the mixed rubber of natural rubber and butadiene rubber, first mix the white carbon black for 80-90 seconds, then add the activator, antioxidant and anti-reversion agent and other additives for 100-120 seconds, discharge at 143-148℃, then add the carbon black in two equal parts, mix for 150 seconds after the first addition, mix for 180 seconds after the second addition, and take out twice to obtain the mixed rubber; Step 2) two-stage vulcanization: put the mixed rubber obtained in step 1) into the mixing chamber of the internal mixer, and add the vulcanizing agent, anti-fatigue agent and accelerator at the same time, mix for 90-180 seconds and discharge, then pass through the mill twice to obtain the rubber material.

[0011] The application has the following beneficial effects: The application selects active agent ZEH-DL instead of stearic acid, which can reduce rubber stress relaxation and creep; the conjugated structure of anti-vulcanization reversion agent PK-900 can react with the unsaturated structure, which compensates for the loss of crosslinking bonds in the vulcanization reversion of the rubber material, reduces the heat generation and fatigue-related physical defects of the rubber material; the selected N762 carbon black has a slight change in material hardness after filling, which can make the creep and dynamic fatigue performance of the rubber material better under the condition of maintaining rigidity; the selected accelerator DM enhances the activity of the vulcanizing agent during the vulcanization process of the rubber, thereby accelerating the crosslinking reaction between the rubber molecules, which can not only significantly shorten the vulcanization time, but also reduce the vulcanization temperature in the production process and improve the actual production efficiency; the selected accelerator DTDM instead of TMTD has a longer scorch time, which makes the vulcanization reaction have more operation time and better processing safety; the selected anti-fatigue agent PL-600 can form a stable coordination structure, improve the strength and elasticity of the rubber, improve the low temperature performance, and increase the tear resistance. The application combines the existing material process, selects reasonable rubber ratio, selects a suitable reinforcing and plasticizing system, adds various additives, and verifies the formula design and cooperation, so that the components used in the formula achieve the best synergistic effect, the production link of the rubber material is simple and easy to operate, the components used are easy to obtain, and the physical properties of the obtained rubber material fully meet the customer's requirements; the obtained rubber material is used to manufacture low dynamic-static ratio and durable automobile rear shock absorber upper support. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic diagram of the automobile rear shock absorber upper support in the embodiment of the application. DETAILED DESCRIPTION

[0013] In order to make the application more obvious and easy to understand, the preferred embodiment is described in detail as follows with the help of the drawings.

[0014] The application provides a rubber material for an upper support of an automobile rear shock absorber, which comprises the following components in parts by weight: natural rubber NR 90-100 parts; butadiene rubber BR 0-10 parts; white carbon black 7.5-8 parts; carbon black N762 15-19 parts; zinc oxide 8 parts; octadecyl acrylate 0.5 parts; active agent ZEH-DL 3.5 parts; anti-aging agent ANTIWAX 6268 3 parts; anti-aging agent 4010NA 2 parts; anti-aging agent SNR 1.5 parts; anti-aging agent OCTAMINE 1 part; solid Si-69 1-1.5 parts; anti-reversion agent PK-900 2.5 parts; vulcanizing agent S-80 1.4-1.6 parts; accelerator DM 0-0.3 parts; accelerator DTDM 0-0.7 parts; accelerator TBTD 1.2-1.8 parts; accelerator CZ 1.2 parts; anti-fatigue agent PL-600 3 parts. The rubber material is prepared through one-stage mixing and two-stage vulcanization. The rubber material is used for manufacturing an automobile rear shock absorber with a low dynamic-static ratio and good durability.

[0015] The SVR-3L natural rubber used in the examples is produced by Pingfu Rubber Factory in Vietnam; the BR9000 butadiene rubber is produced by Shanghai Gaoqiao Petrochemical; the white carbon black is HCSIL-822MP white carbon black produced by Shanghai Cabot Carbon Black Factory; the active zinc oxide is produced by Shanghai Bei Yushang Industrial Co., Ltd.; the octadecyl acrylate is produced by Shanghai Changyue Chemical Co., Ltd.; the physical anti-aging agent ANTIWAX 6268 is produced by Shanghai Changyue Chemical Co., Ltd.; the active agent ZEH-DL is produced by Zhenjiang Langsai New Material Technology Co., Ltd.; the anti-aging agent 4010NA is produced by Shanghai Rubber Auxiliary Factory; the anti-aging agent SNR is produced by Shanghai Linjing Trade Co., Ltd.; the anti-aging agent Octamine is produced by Shanghai Yadeven Fine Chemical Co., Ltd.; the solid Si-69 is produced by ARERA Corporation; the anti-reversion agent PK-900 is produced by Shanghai Changyue Chemical Co., Ltd.; the carbon black N762 is produced by Shanghai Cabot Carbon Black Factory; the vulcanizing agent S-80 is produced by Shanghai Bei Yushang Industrial Co., Ltd.; the accelerator DTDM is produced by Puyang Weilin Chemical Co., Ltd.; the accelerator TBTD is produced by Puyang Weilin Chemical Co., Ltd.; the accelerator CZ is produced by Puyang Weilin Chemical Co., Ltd.; the rubber anti-fatigue agent PL-600 is produced by Puyang Weilin Chemical Co., Ltd.; the anti-aging agent RD in the comparative example is produced by Shanghai Linjing Trade Co., Ltd.; the accelerator DM is produced by Puyang Weilin Chemical Co., Ltd.; and other raw materials are commercially available products.

[0016] Example 1 The application provides a rubber material for an upper support of an automobile rear shock absorber, which comprises the following components in parts by weight (as shown in Table 1): Table 1

[0017] The application provides a preparation method of an automobile rear shock absorber upper support rubber material, and comprises the following steps: Step 1) one-stage mixing: natural rubber is plasticized in a plasticator, white carbon black is first mixed for 80-90 seconds, then small material additives such as activators, anti-aging agents and anti-reversion agents are mixed for 100-120 seconds, and the plasticator is discharged at 143-148 ℃, then carbon black is evenly added twice, the first time is mixed for 150 seconds, the second time is mixed for 180 seconds, and the plasticator is lifted twice to obtain a mixed rubber; Step 2) two-stage vulcanization: the mixed rubber obtained in step 1) is put into a mixing chamber of a mixer, vulcanizing agents, anti-fatigue agents and accelerators are put in at the same time, the mixture is mixed for 90-180 seconds and discharged, and the mixture is discharged twice on an open mill to obtain a rear shock absorber upper support rubber material.

[0018] Example 2 An automobile engine rear shock absorber upper support rubber material contains the following components (as shown in Table 2) in parts by weight: Table 2

[0019] The application provides a preparation method of an automobile rear shock absorber upper support rubber material, which is the same as that in the above example 1.

[0020] Example 3 An automobile engine rear shock absorber upper support rubber material contains the following components (as shown in Table 3) in parts by weight: Table 3

[0021] The application provides a preparation method of an automobile rear shock absorber upper support rubber material, which is the same as that in the above example 1, except that natural rubber and butadiene rubber mixed rubber are added to the plasticator in step 1) one-stage mixing.

[0022] Example 4 An automobile engine rear shock absorber upper support rubber material contains the following components (as shown in Table 4) in parts by weight: Table 4

[0023] The application provides a preparation method of an automobile rear shock absorber upper support rubber material, which is the same as that in the above example 1, except that natural rubber and butadiene rubber mixed rubber are added to the plasticator in step 1) one-stage mixing.

[0024] Comparative Example 1 A conventional rubber material contains the following components (as shown in Table 5) in parts by weight: Table 5

[0025] The present application provides a method for preparing a rubber material for an upper support of an automobile rear shock absorber, which is the same as that of Example 1.

[0026] The rubber materials of Examples 1-4 and the comparative examples are prepared by using a conventional process, and are respectively tested. The test data according to the HG / T 2196-2004 BA grade are shown in Table 6.

[0027] Table 6

[0028] From the experimental data, it can be seen that, compared with the conventional rubber material, the rubber material of the present application has high tensile strength, high tear strength, good heat resistance, excellent high-temperature compression set performance, low hardness change after aging, and high strength retention rate at similar hardness.

[0029] The rubber materials of Examples 1-4 and the rubber material prepared in the comparative example are respectively made into an upper support of an automobile rear shock absorber (as shown in Table 7) and are subjected to a dynamic-static ratio test according to the following method. The test data are shown in Table 7. Figure 1

[0030] Table 7

[0031] As shown in Table 7, compared with the conventional rubber material, the upper support of an automobile rear shock absorber made of the rubber material of the present application has a greatly reduced dynamic-static ratio under the condition of an axial static stiffness of 550 N / mm with an error of ±15% at 40 Hz, and the highest reduction is more than 20%. The stiffness loss after durability is reduced by 14%-24%.

[0032] The above description is only a preferred embodiment of the present application, and is not intended to limit the present application in any form or in essence. It should be noted that those skilled in the art can make some improvements and supplements without departing from the present application, and these improvements and supplements should also be considered as the protection scope of the present application. Any equivalent changes, modifications and evolutions made by those skilled in the art based on the disclosed technical content without departing from the spirit and scope of the present application are equivalent embodiments of the present application. Meanwhile, any equivalent changes, modifications and evolutions made by those skilled in the art based on the disclosed technical content without departing from the spirit and scope of the present application are equivalent embodiments of the present application.​

Claims

1. An automobile rear shock absorber upper bearing rubber material, characterized by, The rubber material comprises the following components in parts by weight: natural rubber 90-100 parts; butadiene rubber 0-10 parts; white carbon black 7.5-8 parts; carbon black N762 15-19 parts; Active zinc oxide 8 parts; octadecyl acrylate 0.5 parts; active agent ZEH-DL 3.5 parts; antioxidant ANTIWAX 6268 3 parts; antioxidant 4010NA 2 parts; antioxidant SNR 1.5 parts; antioxidant OCTAMINE 1 part; solid Si-69 1-1.5 parts; anti-reversion agent PK-900 2.5 parts; vulcanizing agent S-80 1.4-1.6 parts; accelerator DM 0-0.3 parts; accelerator DTDM 0-0.7 parts; Accelerator TBTD 1.2-1.8 parts; accelerator CZ 1.2 parts; anti-fatigue agent PL-600 3 parts; The rubber material is used for manufacturing an automobile rear shock absorber upper support with low dynamic-static ratio and good durability.

2. The rubber material for an upper bearing of an automobile rear shock absorber according to claim 1, characterized by, The natural rubber is SVR-3L natural rubber.

3. The rubber material for an upper bearing of an automobile rear shock absorber according to claim 1, wherein The butadiene rubber is BR9000 butadiene rubber.

4. The rubber material for an upper bearing of an automobile rear shock absorber according to claim 1, wherein The white carbon black is HCSIL-822MP white carbon black.

5. A preparation method of the automobile rear shock absorber upper support rubber material according to claim 1, comprising the following steps: Step 1): plasticize the natural rubber or the mixed rubber of natural rubber and butadiene rubber, first mix the white carbon black for 80-90 seconds, then mix the active agent, antioxidant and anti-reversion agent and other additives for 100-120 seconds, discharge at 143-148℃, then evenly add the carbon black in two times, mix for 150 seconds after the first time, mix for 180 seconds after the second time, and take out twice, to obtain the mixed rubber; Step 2): put the mixed rubber obtained in step 1) into the mixing chamber of the internal mixer, and put the vulcanizing agent, anti-fatigue agent and accelerator into the mixing chamber at the same time, mix for 90-180 seconds, then discharge, pass through the mill twice on the open mill to obtain the rubber material.

Images