阅读说明：本技术 一种高性能空气弹簧用橡胶材料 (High-performance rubber material for air spring ) 是由 詹炜 周国荣 井垒 苏怀生 高建国 詹才福 于 2020-12-04 设计创作，主要内容包括：本发明公开了一种高性能空气弹簧用橡胶材料,组成成分如下：天然橡胶35-50份,氯丁橡胶30-40份,丁腈橡胶10-35份,炭黑N660 15-25份,炭黑N550 20-30份,氧化锌5-8份,硬脂酸2-5份,烷烃油15-30份,硫磺1-2份,微晶腊3-5份,防老剂ODA 1-2份,防老剂BLE 1-2份,促进剂PZ 1-2份,促进剂ETU 1-2份。本发明耐高温性能良好,抗热老化能力强,抗臭氧能力强,适合应用做橡胶空气弹簧用胶料。(The invention discloses a high-performance rubber material for an air spring, which comprises the following components: 35-50 parts of natural rubber, 30-40 parts of chloroprene rubber, 10-35 parts of nitrile rubber, 6-25 parts of carbon black N66015, 20-30 parts of carbon black N550, 5-8 parts of zinc oxide, 2-5 parts of stearic acid, 15-30 parts of alkane oil, 1-2 parts of sulfur, 3-5 parts of microcrystalline wax, 1-2 parts of anti-aging agent ODA, 1-2 parts of anti-aging agent BLE, 1-2 parts of accelerator PZ and 1-2 parts of accelerator ETU. The rubber material has good high temperature resistance, strong thermal aging resistance and strong ozone resistance, and is suitable for being used as rubber material for rubber air springs.)

1. The rubber material for the high-performance air spring is characterized by comprising the following components in parts by mass: 35-50 parts of natural rubber, 30-40 parts of chloroprene rubber, 10-35 parts of nitrile rubber, 6-25 parts of carbon black N66015, 20-30 parts of carbon black N550, 5-8 parts of zinc oxide, 2-5 parts of stearic acid, 15-30 parts of alkane oil, 1-2 parts of sulfur, 3-5 parts of microcrystalline wax, 1-2 parts of anti-aging agent ODA, 1-2 parts of anti-aging agent BLE, 1-2 parts of accelerator PZ and 1-2 parts of accelerator ETU.

2. The rubber material for the high-performance air spring as claimed in claim 1, wherein the rubber material comprises the following components in parts by mass: 35 parts of natural rubber, 35 parts of chloroprene rubber, 20 parts of nitrile rubber, N66015 parts of carbon black, N55025 parts of carbon black, 5 parts of zinc oxide, 2 parts of stearic acid, 15 parts of alkane oil, 1 part of sulfur, 3 parts of microcrystalline wax, 1 part of an anti-aging agent ODA, 1 part of an anti-aging agent BLE, 1 part of an accelerator PZ and 2 parts of an accelerator ETU.

3. The rubber material for a high performance air spring according to claim 1, characterized by comprising the following components: 50 parts of natural rubber, 30 parts of chloroprene rubber, 20 parts of nitrile rubber, N66025 parts of carbon black, N55020 parts of carbon black, 8 parts of zinc oxide, 5 parts of stearic acid, 30 parts of alkane oil, 2 parts of sulfur, 5 parts of microcrystalline wax, 2 parts of an anti-aging agent ODA, 2 parts of an anti-aging agent BLE, 2 parts of an accelerator PZ and 1 part of an accelerator ETU.

4. The rubber material for a high performance air spring according to claim 1, characterized by comprising the following components: 40 parts of natural rubber, 40 parts of chloroprene rubber, 10 parts of nitrile rubber, N66020 parts of carbon black, N55030 parts of carbon black, 6 parts of zinc oxide, 3 parts of stearic acid, 25 parts of alkane oil, 1 part of sulfur, 4 parts of microcrystalline wax, 1.5 parts of an anti-aging agent ODA, 1.5 parts of an anti-aging agent BLE, 1.5 parts of a promoter PZ and 1.5 parts of a promoter ETU.

5. The rubber material for a high performance air spring according to any one of claims 1 to 4, wherein the chloroprene rubber is one of CR122, CR321 and CR 322.

6. The preparation method of the rubber material for the high-performance air spring according to claim 1, wherein the preparation method comprises the following steps of 1) plasticating natural rubber in a first stage and standing for later use; 2) mixing in the first stage, natural rubber, chloroprene rubber and nitrile rubber are put into a banbury mixer for 60-90 seconds, and then carbon black, zinc oxide, stearic acid, an anti-aging agent, alkane oil and a plasticizer are put into the banbury mixer for mixing and then sheet production is carried out for later use; 3) and in the second-stage mixing, adding the accelerator and the rest raw materials into the material subjected to the upper-stage mixing, performing second mixing, fully mixing, cleaning, then mixing again, fully dispersing, and discharging rubber to obtain the high-performance rubber material for the air spring.

Technical Field

The invention belongs to the field of rubber, and particularly relates to a high-performance rubber material for an air spring.

Background

The rubber air spring is a curved capsule formed by sticking rubber and net thread, two ends of the capsule are connected by two steel plates to form a compressed air chamber, compressed air is filled into the air spring, the elasticity action is realized by utilizing the compressibility of the air, and the rubber air spring is a nonmetal spring with the spring action.

The rubber air spring has the advantages of high-frequency vibration isolation, sound insulation and low natural vibration frequency, can well realize vibration isolation, and ensures the safety and stability of the base of the vibration equipment and the control system. Therefore, the rubber air spring is mainly applied to vibration isolation which needs buffering, vibration isolation and stroke control in the industries of vehicles, lifting equipment, shock absorption equipment, military industry and the like, such as vibration isolation of guided missiles and control launching equipment devices and the like. The rubber air spring is widely applied to passenger cars, trucks, suspension trailers, saloon cars, rail transit, light rails, trains, industrial application and the like at present, therefore, the rubber material with better high temperature resistance and ozone resistance is selected to become the inevitable trend of the rubber air spring in the future, the rubber air spring has wide sale space, and the foreign development market is more unlimited in potential.

Disclosure of Invention

The invention aims to solve the problems and provides a high-performance rubber material for an air spring, which has excellent high-temperature resistance and ozone resistance and is suitable for being used as rubber for the rubber air spring.

In order to achieve the purpose, the invention provides the following technical scheme: the rubber material for the high-performance air spring comprises the following components in parts by mass: 35-50 parts of natural rubber, 30-40 parts of chloroprene rubber, 10-35 parts of nitrile rubber, 6-25 parts of carbon black N66015, 20-30 parts of carbon black N550, 5-8 parts of zinc oxide, 2-5 parts of stearic acid, 15-30 parts of alkane oil, 1-2 parts of sulfur, 3-5 parts of microcrystalline wax, 1-2 parts of anti-aging agent ODA, 1-2 parts of anti-aging agent BLE, 1-2 parts of accelerator PZ and 1-2 parts of accelerator ETU.

Preferably, the rubber material for the high-performance air spring comprises the following components in parts by weight: 35 parts of natural rubber, 35 parts of chloroprene rubber, 20 parts of nitrile rubber, N66015 parts of carbon black, N55025 parts of carbon black, 5 parts of zinc oxide, 2 parts of stearic acid, 15 parts of alkane oil, 1 part of sulfur, 3 parts of microcrystalline wax, 1 part of an anti-aging agent ODA, 1 part of an anti-aging agent BLE, 1 part of an accelerator PZ and 2 parts of an accelerator ETU.

Preferably, the rubber compound comprises the following components: 50 parts of natural rubber, 30 parts of chloroprene rubber, 20 parts of nitrile rubber, N66025 parts of carbon black, N55020 parts of carbon black, 8 parts of zinc oxide, 5 parts of stearic acid, 30 parts of alkane oil, 2 parts of sulfur, 5 parts of microcrystalline wax, 2 parts of an anti-aging agent ODA, 2 parts of an anti-aging agent BLE, 2 parts of an accelerator PZ and 1 part of an accelerator ETU.

Preferably, the rubber compound comprises the following components: 40 parts of natural rubber, 40 parts of chloroprene rubber, 10 parts of nitrile rubber, N66020 parts of carbon black, N55030 parts of carbon black, 6 parts of zinc oxide, 3 parts of stearic acid, 25 parts of alkane oil, 1 part of sulfur, 4 parts of microcrystalline wax, 1.5 parts of an anti-aging agent ODA, 1.5 parts of an anti-aging agent BLE, 1.5 parts of a promoter PZ and 1.5 parts of a promoter ETU.

Preferably, the grade of the chloroprene rubber is any one of CR122, CR321 and CR 322.

The preparation method of the rubber material for the high-performance air spring comprises the following steps of 1) plasticating natural rubber in a first stage and standing for later use; 2) mixing in the first stage, natural rubber, chloroprene rubber and nitrile rubber are put into a banbury mixer for 60-90 seconds, and then carbon black, zinc oxide, stearic acid, an anti-aging agent, alkane oil and a plasticizer are put into the banbury mixer for mixing and then sheet production is carried out for later use; 3) and in the second-stage mixing, adding the accelerator and the rest raw materials into the material subjected to the upper-stage mixing, performing second mixing, fully mixing, cleaning, then mixing again, fully dispersing, and discharging rubber to obtain the high-performance rubber material for the air spring.

The invention selects natural rubber and chloroprene rubber nitrile rubber to make the rubber material have excellent basic physical and mechanical properties. The rubber material is used together with carbon black N660 and carbon black N550 to enhance the integral ozone resistance and flame retardant property of the rubber material. The modified pottery clay is adopted to make the rubber material have low-pressure deformability. The combination of the anti-aging agent ODA and the anti-aging agent BLE enhances the high-temperature performance of the rubber material, and improves the weather protection capability and the ozone resistance of the rubber material.

The above technical scheme enables the performance achieved by the invention to be as follows:

1. hardness 55 + -5 Shore A;

2. the tensile strength is more than or equal to 20 MPa;

3. the elongation at break is more than or equal to 500 percent;

4. aging in hot air at 100 ℃ for 72 h;

hardness change: 5Shore A;

tensile strength change rate: -20% to 0

Elongation at break change rate: -30 to 0

5. Ozone resistance 50pphm x 40 ℃ x 72h without cracks.

The performance characteristics show that the rubber composition has excellent basic physical properties, good high-temperature resistance, strong thermal aging resistance and strong ozone resistance, and is suitable for being used as a rubber material for rubber air springs.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples 1 to 4

The preparation method of the rubber material for the high-performance air spring comprises the following steps: 1) in the first stage of plastication, firstly plasticating the natural rubber and standing for later use; 2) mixing in the first stage, natural rubber, chloroprene rubber and nitrile rubber are put into a banbury mixer for 60-90 seconds, and then carbon black, zinc oxide, stearic acid, an anti-aging agent, alkane oil and a plasticizer are put into the banbury mixer for mixing and then sheet production is carried out for later use; 3) and in the second-stage mixing, adding the accelerator and the rest raw materials into the material subjected to the upper-stage mixing, performing second mixing, fully mixing, cleaning, then mixing again, fully dispersing, and discharging rubber to obtain the high-performance rubber material for the air spring.

The names and proportions of the raw materials in the rubber compound of the invention are shown in Table 1.

TABLE 1

TABLE 2 Properties of the compositions prepared in examples 1 to 4

As can be seen from Table 2, the hardness of the rubber material is 55 +/-5 Shore A, the tensile strength is more than or equal to 20MPa, the elongation at break is more than or equal to 500 percent, and the basic physical and mechanical properties are excellent; meanwhile, the change rate of tensile strength of hot air aging (100 ℃ multiplied by 72h) is within-20% -0, the change rate of elongation is within-30% -0, and no crack exists at 50pphm multiplied by 40 ℃ multiplied by 72h in an ozone resistance test. Therefore, the rubber material has the advantages of excellent high temperature resistance, good high temperature resistance, strong thermal aging resistance and strong ozone resistance, and is suitable for being used as a rubber material for rubber air springs.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.