CN115873364A - Halogen-free rubber material with high damping and low hardness and preparation method thereof - Google Patents

Abstract

The invention discloses a halogen-free rubber material for high damping and low hardness and a preparation method thereof, specifically relates to the technical field of rubber materials, and comprises the following raw materials: EPDM rubber, Mg(OH)2, methacrylic acid, methyl Magnesium acrylate, ethylene vinyl acetate copolymer, acrylate rubber, reinforcing agent, anti-aging agent, acid absorbing agent, plasticizer, vulcanizing agent. The present invention excludes halogen-containing materials such as active chlorine acrylate, chlorinated/brominated butyl rubber, etc., so that halogen is avoided in the rubber material, and a high damping coefficient can be obtained by using acrylate monomers. On the one hand, it can control Reasonable Mooney value and glass transition temperature, on the other hand, increase the plasticizer with large cohesive energy to obtain a rubber material with a high damping coefficient, which greatly exceeds the level of ordinary materials. Magnesium methacrylate polymerizes and contacts branched to the main chain of EPDM rubber, thereby improving the mechanical properties and flame retardancy of the rubber material.

Description

A kind of halogen-free rubber material for high damping and low hardness and preparation method thereof

technical field

The invention relates to the technical field of rubber materials, more specifically, the invention relates to a halogen-free rubber material for high damping and low hardness and a preparation method thereof.

Background technique

Polymer flame retardants can be divided into two categories: halogen-containing and halogen-free. Among them, halogen-containing flame retardants, especially brominated cation flame retardants, have high flame retardant efficiency, but they will produce toxic substances under certain circumstances. Halogen includes fluorine F, Chlorine Cl, bromine Br, iodine I, astatine At, halogen-free, are related to the regulations on the content of halogen elements in electronic products. Electronic products whose content of halogen elements in electronic products meet the relevant regulations are called halogen-free products. For halogen-free Different products have different limit standards.

Rubber material is a kind of polymer material. An important characteristic of polymer material is viscoelasticity, and its damping effect is directly related to its dynamic mechanical relaxation. When polymer materials are subjected to alternating external forces, the strain lags behind the stress, resulting in hysteresis. It is precisely because of the hysteresis phenomenon that in the process of stretching and retracting cycles, it is necessary to overcome the internal friction resistance between the chain segments to generate internal friction, convert mechanical energy into heat energy, and dissipate it in the form of heat, thus playing the role of shock absorption and damping. Function, many precision equipment need to avoid vibration during operation, such as some key sensors, the function of damping material is to effectively block the vibration of the vibration source, and quickly convert the mechanical energy of vibration into the internal friction of the material, so as to Released in the form of heat energy, thus avoiding the vibration of precision equipment. In order to measure the quality of the damping effect, the damping coefficient tanθ is usually used to express, and the larger the value, the more vibration can be reduced.

Existing rubber materials cannot meet people's needs. The rubber materials still contain a lot of halogen elements, so that the safety performance of the rubber materials needs to be improved, and the cohesive energy between molecules is low, resulting in a low damping coefficient.

Contents of the invention

In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a halogen-free rubber material for high damping and low hardness and a preparation method thereof. The problem to be solved by the present invention is: how to improve the safety performance and damping coefficient of the rubber material.

In order to achieve the above object, the present invention provides the following technical solution: a halogen-free rubber material for high damping and low hardness, comprising the following raw materials in parts by weight: 40-50 parts of EPDM rubber, 22-5 parts of Mg(OH) , 5-6 parts of methacrylic acid, 2-3 parts of magnesium methacrylate, 0.5-1 part of ethylene vinyl acetate copolymer, 50-60 parts of acrylate rubber, 20-30 parts of reinforcing agent, 2-3 parts of anti-aging agent parts, 2-4 parts of acid absorbing agent, 15-25 parts of plasticizer, and 1-2 parts of vulcanizing agent.

In a preferred embodiment: the Mooney viscosity of the acrylate rubber is 20-80 MU, the glass transition temperature is -10--1°C, and the anti-aging agent is any of anti-aging agent 445, anti-aging agent ODA, and anti-aging agent RD. One, the vulcanizing agent is hexamethylene diaminocarbamate, and the acid absorbing agent is any one of magnesium oxide, calcium oxide, and antimony oxide.

The present invention also provides a method for preparing a halogen-free rubber material with high damping and low hardness. The specific preparation steps are as follows:

Step 1: Weigh EPDM rubber into the internal mixer for mixing, weigh Mg(OH)2 into the internal mixer, mix for 5-8min, slowly add methacrylic acid to the internal mixer , mixing for 8-12 minutes, adding magnesium methacrylate and mixing for 8-12 minutes to obtain a masterbatch;

Step 2: uniformly mix the masterbatch and ethylene vinyl acetate copolymer, raise the temperature to 110-130°C, add the mixture to an open mill, and knead for 2-5 minutes to obtain mixture 1;

Step 3: Weigh the acrylate rubber and add it to the internal mixer for mixing, weigh the reinforcing agent, anti-aging agent and acid absorbing agent and add it to the internal mixer, adjust the speed to 40-50 rpm, and mix until 70-76°C, weigh the plasticizer and add it to the internal mixer, knead at 80-90°C, weigh the vulcanizing agent and add it to the internal mixer, and knead at 90-100°C to obtain mixture 2;

Step 4: Mix the mixture 1 and the mixture 2 uniformly to obtain the mixed colloid, put the mixed colloid into the open mill, and release the film, place the film under the air conditioner and cool it to 20-35°C to obtain the halogen-free rubber material.

In a preferred embodiment: said step 1, the EPDM rubber is put into an internal mixer for mixing, the temperature of the internal mixer rises to 60-70°C, and the mixing is performed for 2-5min at a speed of 32-35r /min.

In a preferred embodiment: in the step, the acrylate rubber is added into an internal mixer for mixing, the speed of the internal mixer is adjusted to 30-35 r/min, the temperature is 50-55° C., and the mixing is performed for 5-10 minutes.

In a preferred embodiment: the reinforcing agent in the third step is one of carbon black and silicon dioxide.

In a preferred embodiment: the plasticizer in step 3 is a polyester resin with a molecular weight of 10,000-30,000.

In a preferred embodiment: in the step 4, the roll pitch of the mill is 2-3 mm, the roll temperature is controlled to 5-60° C., thin pass 6 times, and then the roll pitch of the mill is 3-4 mm.

Technical effect and advantage of the present invention:

1. The halogen-free rubber material prepared by using the raw material formula of the present invention avoids halogens in the rubber material by excluding materials that contain halogens such as active chlorine acrylate, chlorinated/brominated butyl rubber, etc. High damping coefficient can be obtained by using acrylate monomer. On the one hand, reasonable Mooney value and glass transition temperature can be controlled. On the other hand, plasticizers with large cohesive energy can be added to obtain rubber materials with high damping coefficient. The damping coefficient It greatly exceeds the level of ordinary materials. By adding carbon black, the damping peak can be shifted to a higher temperature, and its elastic modulus can be increased. When the sheet is mixed on an open mill, it can be used as a plasticizer for damping rubber to make the damping The transition zone is widened to ensure that the halogen-free rubber material has both good damping performance and high modulus. It is a polymer of acrylate rubber, and the binary organic hybrid system formed in the polymer has particularly excellent properties. Damping performance, the formed mixed colloid is a mixture formed by organic small molecules with certain functional groups and polar polymers, which realizes a relatively uniform molecular level mixing on the macroscopic level, and has a large number of relatively uniform microphase separation regions on the microscopic level, plus The existence of forces such as hydrogen bonds between the rubber materials can not only greatly increase the height of the loss factor peak, but also regulate the position of the loss factor peak, and further improve the damping performance of the rubber material.

2. For the halogen-free rubber material prepared by the raw material formula of the present invention, the combination between EPDM rubber and Mg(OH)2 is strengthened by adding methacrylic acid, and after adding methacrylic acid in the low-temperature mixing stage , methacrylic acid reacts with Mg(OH)2 to generate magnesium methacrylate. In the high-temperature vulcanization stage, magnesium methacrylate can significantly improve the interaction between EPDM rubber and Mg(OH)2, making methacrylic acid Magnesium is polymerized and grafted to the main chain of EPDM rubber to improve the mechanical properties and flame retardancy of the rubber material. The ethylene vinyl acetate copolymer can improve the Mg(OH)2 high filling EPDM rubber. Tensile strength and oxygen index, the oxygen index of the rubber material increases, that is, the oxygen content decreases, which improves the flame retardancy of the rubber material. Acrylic rubber is used as a wide temperature range high damping material and hexamethylene diamino formic acid The combination of amino acid salt makes it have higher tear strength and modulus stress after vulcanization, and has lower hardness and softer.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1:

The invention provides a halogen-free rubber material for high damping and low hardness, comprising the following raw materials in parts by weight: 40 parts of EPDM rubber, 2 parts of Mg(OH)2, 5 parts of methacrylic acid, magnesium methacrylate 2 parts, 0.5 parts of ethylene vinyl acetate copolymer, 50 parts of acrylate rubber, 20 parts of reinforcing agent, 2 parts of anti-aging agent, 2 parts of acid absorbing agent, 15 parts of plasticizer, and 1 part of vulcanizing agent.

In a preferred embodiment: the Mooney viscosity of the acrylate rubber is 50 MU, the glass transition temperature is -6°C, the anti-aging agent is anti-aging agent 445, and the vulcanizing agent is ammonium hexamethylene dicarbamate salt, and the acid absorbing agent is magnesium oxide.

The present invention also provides a method for preparing a halogen-free rubber material with high damping and low hardness. The specific preparation steps are as follows:

Step 1: Weigh EPDM rubber into the internal mixer for mixing, weigh Mg(OH)2 into the internal mixer, mix for 6 minutes, slowly add methacrylic acid dropwise to the internal mixer, Mixing for 10 minutes, adding magnesium methacrylate and mixing for 10 minutes to obtain masterbatch;

Step 2: uniformly mix the masterbatch and ethylene vinyl acetate copolymer, raise the temperature to 120°C, add the mixture to the open mill, and knead for 4 minutes to obtain mixture 1;

Step 3: Weigh the acrylate rubber and add it to the internal mixer for mixing, weigh the reinforcing agent, anti-aging agent and acid absorbing agent and add it to the internal mixer, adjust the speed to 45 rpm, and mix to 73°C , weigh the plasticizer and add it to the internal mixer, knead at 85°C, weigh the vulcanizing agent and add it to the internal mixer, and knead at 95°C to obtain mixture 2;

Step 4: Mix the mixture 1 and the mixture 2 evenly to obtain the mixed colloid, put the mixed colloid into the open mill, and release the film, place the film under the air conditioner and cool it to 30°C to obtain the halogen-free rubber material.

In a preferred embodiment: Step 1: put the EPDM rubber into an internal mixer for mixing, the temperature of the internal mixer is raised to 65° C., and the mixing is performed for 4 minutes at a speed of 34 r/min.

In a preferred embodiment: in the step, the acrylate rubber is added into an internal mixer for mixing, the speed of the internal mixer is adjusted to 33 r/min, the temperature is 53° C., and the mixing is carried out for 7 minutes.

In a preferred embodiment: the reinforcing agent in the third step is one of carbon black and silicon dioxide.

In a preferred embodiment: the plasticizer in step 3 is a polyester resin with a molecular weight of 10,000-30,000.

In a preferred embodiment: in the step 4, the roll pitch of the mill is 2.5 mm, the roll temperature is controlled to 40° C., thin passes are made 6 times, and then the roll pitch of the mill is set to 3.5 mm.

Example 2:

Different from Example 1, the present invention provides a halogen-free rubber material for high damping and low hardness, including the following raw materials in parts by weight: 50 parts of EPDM rubber, 25 parts of Mg(OH), methacrylic acid 6 parts, 3 parts of magnesium methacrylate, 1 part of ethylene vinyl acetate copolymer, 60 parts of acrylate rubber, 30 parts of reinforcing agent, 3 parts of anti-aging agent, 4 parts of acid absorbing agent, 25 parts of plasticizer, vulcanizing agent 2 servings.

Example 3:

Different from Examples 1-2, the present invention provides a halogen-free rubber material for high damping and low hardness, including the following raw materials in parts by weight: 45 parts of EPDM rubber, 24 parts of Mg(OH), 5.5 parts of methacrylic acid, 2.5 parts of magnesium methacrylate, 0.9 parts of ethylene vinyl acetate copolymer, 55 parts of acrylate rubber, 25 parts of reinforcing agent, 2.5 parts of anti-aging agent, 3 parts of acid absorbing agent, 20 parts of plasticizer part, 1.5 parts of vulcanizing agent.

Example 4:

The invention provides a halogen-free rubber material for high damping and low hardness, including 40 parts of EPDM rubber, 22 parts of Mg(OH), 5 parts of methacrylic acid, 2 parts of magnesium methacrylate, and ethylene vinyl acetate 0.5 parts of copolymer, 50 parts of acrylate rubber.

The present invention also provides a method for preparing a halogen-free rubber material with high damping and low hardness. The specific preparation steps are as follows:

Step 1: Weigh EPDM rubber into the internal mixer for mixing, weigh Mg(OH)2 into the internal mixer, mix for 6 minutes, slowly add methacrylic acid dropwise to the internal mixer, Mixing for 10 minutes, adding magnesium methacrylate and mixing for 10 minutes to obtain masterbatch;

Step 2: Mix the masterbatch and ethylene vinyl acetate copolymer evenly, raise the temperature to 120°C, add the mixture to the open mill, and knead for 4 minutes to obtain the mixed colloid;

Step 3: put the mixed colloid into the open mill, and release the film. The film is placed under the air conditioner and air-cooled to 20-35°C to obtain a halogen-free rubber material.

In a preferred embodiment: Step 1: put the EPDM rubber into an internal mixer for mixing, the temperature of the internal mixer is raised to 65° C., and the mixing is performed for 4 minutes at a speed of 34 r/min.

In a preferred embodiment: in the step 3, the roll pitch of the mill is 2.5 mm, the roll temperature is controlled to 40° C., thin passes are made 6 times, and then the roll pitch of the mill is set to 3.5 mm.

Example 5:

A rubber material, including 50 parts of acrylate rubber, 20 parts of reinforcing agent, 2 parts of anti-aging agent, 2 parts of acid absorbing agent, 15 parts of plasticizer, 1 part of vulcanizing agent, and 40 parts of EPDM rubber.

The present invention also provides a method for preparing a halogen-free rubber material with high damping and low hardness. The specific preparation steps are as follows:

Step 1: Weigh the acrylate rubber and add it to the internal mixer for mixing, weigh the reinforcing agent, anti-aging agent and acid absorbing agent and add it to the internal mixer, adjust the speed to 45 rpm, and mix to 73°C , weigh the plasticizer and add it to the internal mixer, knead at 85°C, weigh the vulcanizing agent and add it to the internal mixer, and knead at 95°C to obtain mixture 2;

Step 2: put the mixed colloid into the open mill, and release the film. The film is placed under the air conditioner and air-cooled to 30°C to obtain a halogen-free rubber material.

In a preferred embodiment: said step 1, the acrylate rubber is added into an internal mixer for mixing, the speed of the internal mixer is adjusted to 33 r/min, the temperature is 53° C., and the mixing is carried out for 7 minutes.

In a preferred embodiment: the reinforcing agent in the first step is one of carbon black and silicon dioxide.

In a preferred embodiment: the plasticizer in the step 1 is a polyester resin with a molecular weight of 10,000-30,000.

In a preferred embodiment: in the step 2, the roll pitch of the mill is 2.5 mm, the roll temperature is controlled to 40° C., thin passes are made 6 times, and then the roll pitch of the mill is set to 3.5 mm.

Comparative example:

The invention provides a rubber material, which comprises 50 parts of acrylate rubber and 40 parts of EPDM rubber.

The present invention also provides a method for preparing a halogen-free rubber material with high damping and low hardness. The specific preparation steps are as follows:

Step 1: Weigh the acrylate rubber and add it to the internal mixer for mixing. Weigh the EPDM rubber and put it into the internal mixer for mixing. The temperature of the internal mixer rises to 65°C and mixes for 4 minutes. The rotating speed is 34r/min. Take out the mixed colloid in the internal mixer, put the mixed colloid into the open mixer, and release the film. The film is placed under the air conditioner and air-cooled to 30°C to obtain a halogen-free rubber material.

In a preferred embodiment: in the step 1, the roll pitch of the mill is 2.5 mm, the roll temperature is controlled to 40° C., thin passes are made 6 times, and then the roll pitch of the mill is set to 3.5 mm.

The sources of raw materials in the above examples and comparative examples are: acrylate rubber is produced by Beijing Lingbao Technology Co., Ltd. and the brand is HMH; carbon black is produced by Shanghai Yuanye Biotechnology Co., Ltd. and the article number is S42095-5g; The product number is S5631-1KG produced by Sigma-Aldrich (Shanghai) Trading Co., Ltd. The anti-aging agent 445 is produced by Wuhan Haishan Technology Co., Ltd. and the product number is 445. The anti-aging agent ODA is produced by Shanghai Yien Chemical Technology Co., Ltd. and the product number is R049919- 1g, anti-aging agent RD is produced by Shanghai Yien Chemical Technology Co., Ltd. and the product number is R054771-100g, hexamethylene dicarbamate is produced by Wuhan Kanos Technology Co., Ltd. and the product number is 8598479, and the magnesium oxide is Sigmaol Manufactured by Derich (Shanghai) Trading Co., Ltd. and the product number is 63089-50G-F. Hydrofossil and calcium oxide are produced by Sigma-Aldrich (Shanghai) Trading Co., Ltd. and the product number is 634182-25G. Antimony oxide is produced by Shanghai Yien Chemical Technology Co., Ltd. and the article number is R052323-1g. The polyester resin is produced by Guangdong East New Material Co., Ltd. and the CAS number is 25135-73-3. The EPDM rubber is produced by Dongguan Dongshuo Plastic Raw Material Co., Ltd., and the model is IP3720P , Mg(OH)2 is produced by Nantong Runfeng Petrochemical Co., Ltd., the product number is 1309-42-8, methacrylic acid is produced by Sigma Aldrich (Shanghai) Trading Co., Ltd. and the product number is 155721-5G, magnesium methacrylate is The brand produced by Wuhan Haorong Biotechnology Co., Ltd. is Haorong, and the ethylene vinyl acetate copolymer is produced by Chongqing Ruiya Biotechnology Co., Ltd. with the product number 24937-78-8.

Take the rubber materials prepared in the above-mentioned Examples 1-5 as the experimental group 1, the experimental group 2, the experimental group 3, the experimental group 4 and the experimental group 5 respectively, and select a kind of rubber material produced in the comparative example for high damping, low hardness, halogen-free The rubber material is used as the control group, and the selected rubber material is tested for hardness, damping coefficient, halogen content, ROHS and oxygen index (according to GB/T 10707-2008, the oxygen index and hardness are measured according to GB530-83 in LX-A rubber hardness Measure the damping performance of the rubber material according to GBT 18258-2000, measure the halogen content of the rubber material according to IEC62321 and record), the test results are shown in Table 1:

Table I

As can be seen from Table 1, the safety performance and the damping coefficient of the rubber material produced by the present invention are higher, and embodiment 4 is compared with embodiment 1 without adding reinforcing agent, anti-aging agent, acid absorbing agent, plasticizer, vulcanizing agent, and implementing Example 5 Compared with Example 1, Mg(OH)2, methacrylic acid, magnesium methacrylate, ethylene vinyl acetate copolymer were not added, and by excluding active chlorine acrylate, chlorinated/brominated butyl rubber, etc. would contain The halogen material avoids halogen in this rubber material, and the high damping coefficient can be obtained by using acrylate monomer. On the one hand, it can control reasonable Mooney value and glass transition temperature, and on the other hand, it can increase the cohesive energy for plasticization. agent, so as to obtain a rubber material with a high damping coefficient, and its damping coefficient greatly exceeds the level of ordinary materials. By adding carbon black, the damping peak can be moved to a higher temperature, and its elastic modulus can be increased. When used as a plasticizer for damping rubber, the damping transition zone is widened to ensure that the halogen-free rubber material has both good damping performance and high modulus. It is a polymer of acrylate rubber, polymerized The binary organic hybrid system formed in the compound has particularly excellent damping properties, and the formed mixed colloid is a mixture of organic small molecules with certain functional groups and polar polymers, which realizes a relatively uniform molecular level mixing on a macroscopic level. Microscopically, there are a large number of relatively uniform microphase separation regions, coupled with the existence of mutual forces such as hydrogen bonds, which can not only greatly increase the height of the loss factor peak, but also control the position of the loss factor peak, and further improve the performance of this rubber. The damping performance of the material, the combination between EPDM rubber and Mg(OH)2 is strengthened by adding methacrylic acid, after adding methacrylic acid in the low temperature mixing stage, the methacrylic acid and Mg(OH)2 occur The reaction produces magnesium methacrylate. In the high temperature vulcanization stage, magnesium methacrylate can significantly improve the interaction between EPDM rubber and Mg(OH)2, so that magnesium methacrylate can be polymerized and grafted to EPDM rubber On the main chain of the rubber material, thereby improving the mechanical properties and flame retardancy of the rubber material, the tensile strength and oxygen index of the Mg(OH)2 high-filled EPDM rubber can be improved through the ethylene vinyl acetate copolymer, and the oxygen index of the rubber material The index increases, that is, the oxygen content decreases, which improves the flame retardant ability of the rubber material. Using acrylic rubber as a wide temperature range high damping material combined with hexamethylene diaminoformic acid acid salt makes it more effective after vulcanization. High tear strength and modulus, and low hardness, relatively soft.

Finally: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention within the scope of protection.

Claims (10)

1. A halogen-free rubber material with high damping and low hardness, characterized in that: it comprises the following raw materials in parts by weight: 40-50 parts of EPDM rubber, 22-5 parts of Mg(OH), 5-5 parts of methacrylic acid 6 parts, 2-3 parts of magnesium methacrylate, 0.5-1 part of ethylene vinyl acetate copolymer, 50-60 parts of acrylate rubber, 20-30 parts of reinforcing agent, 2-3 parts of anti-aging agent, 2 parts of acid absorber -4 parts, plasticizer 15-25 parts, vulcanizing agent 1-2 parts. 2. A halogen-free rubber material for high damping and low hardness according to claim 1, characterized in that: it comprises the following raw materials in parts by weight: 35-55 parts of EPDM rubber, Mg(OH)21-7 3-8 parts of methacrylic acid, 1-4 parts of magnesium methacrylate, 0.1-2 parts of ethylene vinyl acetate copolymer, 45-68 parts of acrylate rubber, 15-37 parts of reinforcing agent, 1- 4 parts, acid absorbing agent 1-5 parts, plasticizer 11-29 parts, vulcanizing agent 0.5-4 parts. 3. A halogen-free rubber material for high damping and low hardness according to claim 1, characterized in that: it comprises the following raw materials in parts by weight: 43-48 parts of EPDM rubber, Mg(OH)23-4 5.1-5.9 parts of methacrylic acid, 2.5-2.8 parts of magnesium methacrylate, 0.6-0.9 parts of ethylene vinyl acetate copolymer, 52-58 parts of acrylate rubber, 22-29 parts of reinforcing agent, 2.2-2.2 parts of anti-aging agent 2.9 parts, acid absorbing agent 2.5-3.5 parts, plasticizer 16-23 parts, vulcanizing agent 1.2-1.8 parts. 4. A halogen-free rubber material for high damping and low hardness according to claim 1, characterized in that: the Mooney viscosity of the acrylate rubber is 20-80MU, the glass transition temperature is -10--1°C, Described anti-aging agent is any one in anti-aging agent 445, anti-aging agent ODA, anti-aging agent RD, and described vulcanizing agent is hexamethylene dicarbamic acid acid acid salt, and described acid absorbing agent is magnesium oxide, calcium oxide, Any one of antimony oxide. 5. A method for preparing a halogen-free rubber material with high damping and low hardness, characterized in that: the specific preparation steps are as follows: Step 1: Weigh EPDM rubber into the internal mixer for mixing, weigh Mg(OH)2 into the internal mixer, mix for 5-8min, slowly add methacrylic acid to the internal mixer , mixing for 8-12 minutes, adding magnesium methacrylate and mixing for 8-12 minutes to obtain a masterbatch; Step 2: uniformly mix the masterbatch and ethylene vinyl acetate copolymer, raise the temperature to 110-130°C, add the mixture to an open mill, and knead for 2-5 minutes to obtain mixture 1; Step 3: Weigh the acrylate rubber and add it to the internal mixer for mixing, weigh the reinforcing agent, anti-aging agent and acid absorbing agent and add it to the internal mixer, adjust the speed to 40-50 rpm, and mix until 70-76°C, weigh the plasticizer and add it to the internal mixer, knead at 80-90°C, weigh the vulcanizing agent and add it to the internal mixer, and knead at 90-100°C to obtain mixture 2; Step 4: Mix the mixture 1 and the mixture 2 uniformly to obtain the mixed colloid, put the mixed colloid into the open mill, and release the film, place the film under the air conditioner and cool it to 20-35°C to obtain the halogen-free rubber material. 6. A kind of preparation method that is used for high damping low hardness halogen-free rubber material according to claim 5, it is characterized in that: described step one EPDM rubber is put into internal mixer and mixes, banburying The temperature of the machine rises to 60-70°C, kneading for 2-5 minutes, and the speed is 32-35r/min. 7. A kind of preparation method that is used for high-damping low-hardness halogen-free rubber material according to claim 5, it is characterized in that: described step three acrylate rubbers are added in the internal mixer for mixing, the internal mixer Adjust the speed to 30-35r/min, temperature 50-55°C, and knead for 5-10min. 8 . The method for preparing a high-damping low-hardness halogen-free rubber material according to claim 5 , wherein the reinforcing agent in step 3 is one of carbon black and silicon dioxide. 9 . The method for preparing a high-damping low-hardness halogen-free rubber material according to claim 5 , wherein the plasticizer in step 3 is polyester resin with a molecular weight of 10,000-30,000. 10. A preparation method for high-damping low-hardness halogen-free rubber material according to claim 5, characterized in that: in the step 4, the roller distance of the open mill is 2-3mm, and the roller temperature is controlled to 5 -60°C, thin pass 6 times, and then set the roller distance of the open mill to 3-4mm.