CN115873364A - Halogen-free rubber material with high damping and low hardness and preparation method thereof - Google Patents
Halogen-free rubber material with high damping and low hardness and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a high-damping low-hardness halogen-free rubber material and a preparation method thereof, and particularly relates to the technical field of rubber materials, wherein the high-damping low-hardness halogen-free rubber material comprises the following raw materials: ethylene propylene diene monomer, mg (OH) 2, methacrylic acid, magnesium methacrylate, ethylene vinyl acetate copolymer, acrylate rubber, reinforcing agent, anti-aging agent, acid acceptor, plasticizer and vulcanizing agent. The invention utilizes the materials which exclude active chlorine acrylic ester, chlorinated/brominated butyl rubber and the like and contain halogen, so that the rubber material avoids the halogen, the acrylic ester monomer can obtain high damping coefficient, on one hand, reasonable Mooney value and glass transition temperature are controlled, on the other hand, the plasticizer with large cohesive energy is added, so that the rubber material with high damping coefficient is obtained, the damping coefficient of the rubber material greatly exceeds the level of common materials, and the magnesium methacrylate is polymerized and grafted to the main chain of the ethylene propylene diene monomer, so that the mechanical property and the flame retardant property of the rubber material are improved.
Description
Technical Field
The invention relates to the technical field of rubber materials, in particular to a high-damping low-hardness halogen-free rubber material and a preparation method thereof.
Background
The flame retardant of the polymer can be divided into two categories, namely halogen-containing flame retardants and halogen-free flame retardants, wherein the halogen-containing flame retardants, particularly brominated flame retardants, have high flame retardant efficiency but generate toxic substances under specific conditions, the halogen includes fluorine F, chlorine Cl, bromine Br, iodine I and astatine At, and halogen-free halogen is a specification related to the content of halogen elements in electronic products, the electronic products in which the content of halogen elements meets relevant specifications are called halogen-free products, and different products have different limited standards for halogen-free requirements.
The rubber material is a high polymer material, one important characteristic of the high polymer material is viscoelasticity, and the damping effect of the high polymer material is directly related to dynamic mechanical relaxation of the high polymer material. When the high polymer material is acted by an alternating external force, the strain lags behind the stress, so that the delay is generated. Just because of hysteresis, all need overcome the internal friction resistance and produce the internal loss between the chain section in the cyclic variation process of stretching and retracting, change mechanical energy into heat energy, dispel in the form of heat, thereby played the effect of shock attenuation damping, the in-process of many precision equipment, need avoid vibration, for example certain key sensor, the effect of damping material is exactly that the vibration of vibration source carries out effectual separation, converts the internal friction of the quick conversion of the mechanical energy of vibration into the material to release in the form of heat energy, thereby avoid the vibration of precision equipment. The damping effect is usually measured by using a damping coefficient tan θ, and the larger the value, the more the vibration can be reduced.
The existing rubber material can not meet the use requirements of people, and still contains a lot of halogen elements, so that the safety performance of the rubber material needs to be improved, and the intermolecular cohesive energy is lower, so that the damping coefficient is lower.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a high-damping low-hardness halogen-free rubber material and a preparation method thereof, and the problems to be solved by the present invention are: how to improve the safety performance and the damping coefficient of the rubber material.
In order to achieve the purpose, the invention provides the following technical scheme: a halogen-free rubber material with high damping and low hardness comprises the following raw materials in parts by weight: 40-50 parts of ethylene propylene diene monomer, 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, 2-4 parts of acid absorbent, 15-25 parts of plasticizer and 1-2 parts of vulcanizing agent.
In a preferred embodiment: the Mooney viscosity of the acrylate rubber is 20-80MU, the glass transition temperature is-10 to-1 ℃, the antioxidant is any one of an antioxidant 445, an antioxidant ODA and an antioxidant RD, the vulcanizing agent is hexamethylene diamine carbamate, and the acid-absorbing agent is any one of magnesium oxide, calcium oxide and antimony oxide.
The invention also provides a preparation method for the high-damping low-hardness halogen-free rubber material, which comprises the following specific preparation steps:
the method comprises the following steps: weighing ethylene propylene diene monomer, placing the ethylene propylene diene monomer into an internal mixer for mixing, weighing Mg (OH) 2, placing the mixture into the internal mixer, mixing for 5-8min, slowly dropwise adding methacrylic acid into the internal mixer, mixing for 8-12min, adding magnesium methacrylate, and mixing for 8-12min to obtain master batch;
step two: uniformly mixing the master batch and the ethylene-vinyl acetate copolymer, heating to 110-130 ℃, adding the mixture on an open mill, and mixing for 2-5min to obtain a mixture I;
step three: weighing olefine acid ester rubber, adding the olefine acid ester rubber into an internal mixer for mixing, weighing reinforcing agent, anti-aging agent and acid-absorbing agent, adding the mixture into the internal mixer, adjusting the rotating speed to 40-50 r/min, mixing to 70-76 ℃, weighing plasticizer, adding the plasticizer into the internal mixer, mixing to 80-90 ℃, weighing vulcanizing agent, adding the vulcanizing agent into the internal mixer, mixing to 90-100 ℃ to obtain a mixture II;
step four: and uniformly mixing the mixture I and the mixture II to obtain a mixed colloid, putting the mixed colloid into an open mill, discharging, and placing the rubber sheet under air conditioning to cool to 20-35 ℃ to obtain the halogen-free rubber material.
In a preferred embodiment: and step one, mixing the ethylene propylene diene monomer rubber in an internal mixer, wherein the temperature of the internal mixer is increased to 60-70 ℃, the mixing is carried out for 2-5min, and the rotating speed is 32-35r/min.
In a preferred embodiment: the triacrylate rubber is added into an internal mixer for mixing, the rotating speed of the internal mixer is adjusted to be 30-35r/min, the temperature is 50-55 ℃, and the mixing time is 5-10min.
In a preferred embodiment: and the reinforcing agent in the third step is one of carbon black and silicon dioxide.
In a preferred embodiment: the plasticizer in the third step is polyester resin, and the molecular weight is 1-3 ten thousand.
In a preferred embodiment: in the fourth step, the roller distance of the open mill is 2-3mm, the roller temperature is controlled to be 5-60 ℃, the thin passing is carried out for 6 times, and then the roller distance of the open mill is 3-4mm.
The invention has the technical effects and advantages that:
1. the halogen-free rubber material prepared by the raw material formula avoids halogen by excluding materials containing halogen such as active chlorine acrylate, chlorinated/brominated butyl rubber and the like, can obtain high damping coefficient by adopting an acrylate monomer, on one hand, reasonable Mooney value and glass transition temperature are controlled, on the other hand, a plasticizer with large cohesive energy is added, so that the rubber material with high damping coefficient is obtained, the damping coefficient greatly exceeds the level of common materials, the damping peak value can be moved to higher temperature by adding carbon black, and the elastic modulus of the rubber material is improved.
2. According to the halogen-free rubber material prepared by the raw material formula, methacrylic acid is added to strengthen the combination between ethylene propylene diene monomer and Mg (OH) 2, after methacrylic acid is added in a low-temperature mixing stage, methacrylic acid reacts with Mg (OH) 2 to generate magnesium methacrylate, in a high-temperature vulcanization stage, the magnesium methacrylate can obviously improve the interaction between the ethylene propylene diene monomer and Mg (OH) 2, so that the magnesium methacrylate is polymerized and grafted to the main chain of the ethylene propylene diene monomer, the mechanical property and the flame retardant property of the rubber material are improved, the tensile strength and the oxygen index of the Mg (OH) 2 high-filled ethylene propylene diene monomer can be improved through an ethylene vinyl acetate copolymer, the oxygen index of the rubber material is improved, namely the oxygen content is reduced, and the flame retardant capability of the rubber material is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious 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.
Example 1:
the invention provides a high-damping low-hardness halogen-free rubber material which comprises the following raw materials in parts by weight: 40 parts of ethylene propylene diene monomer, 2 parts of Mg (OH), 5 parts of methacrylic acid, 2 parts of magnesium methacrylate, 0.5 part 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 50MU, the glass transition temperature is-6 ℃, the anti-aging agent is an anti-aging agent 445, the vulcanizing agent is hexamethylene dicarbamate, and the acid-absorbing agent is magnesium oxide.
The invention also provides a preparation method for the high-damping low-hardness halogen-free rubber material, which comprises the following specific preparation steps:
the method comprises the following steps: weighing ethylene propylene diene monomer rubber, placing the ethylene propylene diene monomer rubber into an internal mixer for mixing, weighing Mg (OH) 2, placing the mixture into the internal mixer, mixing for 6min, slowly dropwise adding methacrylic acid into the internal mixer, mixing for 10min, adding magnesium methacrylate, and mixing for 10min to obtain master batch;
step two: uniformly mixing the master batch and the ethylene-vinyl acetate copolymer, heating to 120 ℃, adding the mixture on an open mill, and mixing for 4min to obtain a mixture I;
step three: weighing the olefine acid ester rubber, adding the olefine acid ester rubber into an internal mixer for mixing, weighing the reinforcing agent, the anti-aging agent and the acid-absorbing agent, adding the reinforcing agent, the anti-aging agent and the acid-absorbing agent into the internal mixer, adjusting the rotating speed to 45 revolutions per minute, mixing to 73 ℃, weighing the plasticizer, adding the plasticizer into the internal mixer, mixing to 85 ℃, weighing the vulcanizing agent, adding the vulcanizing agent into the internal mixer, mixing to 95 ℃ to obtain a second mixture;
step four: and uniformly mixing the mixture I and the mixture II to obtain a mixed colloid, putting the mixed colloid into an open mill, discharging, and placing the rubber sheet under air conditioning air to cool to 30 ℃ to obtain the halogen-free rubber material.
In a preferred embodiment: and step one, mixing the ethylene propylene diene monomer rubber in an internal mixer, wherein the temperature of the internal mixer is increased to 65 ℃, the mixing is carried out for 4min, and the rotating speed is 34r/min.
In a preferred embodiment: and (3) adding the triacrylate rubber into an internal mixer for mixing, wherein the rotating speed of the internal mixer is adjusted to 33r/min, the temperature is 53 ℃, and the mixing time is 7min.
In a preferred embodiment: and the reinforcing agent in the third step is one of carbon black and silicon dioxide.
In a preferred embodiment: the plasticizer in the third step is polyester resin, and the molecular weight is 1-3 ten thousand.
In a preferred embodiment: in the fourth step, the roller spacing of the open mill is 2.5mm, the roller temperature is controlled to be 40 ℃, the thin passing is carried out for 6 times, and then the roller spacing of the open mill is 3.5mm.
Example 2:
different from the embodiment 1, the invention provides a high-damping low-hardness halogen-free rubber material which comprises the following raw materials in parts by weight: 50 parts of ethylene propylene diene monomer, 25 parts of Mg (OH), 6 parts of methacrylic acid, 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 acceptor, 25 parts of plasticizer and 2 parts of vulcanizing agent.
Example 3:
different from the embodiments 1-2, the invention provides a high-damping low-hardness halogen-free rubber material, which comprises the following raw materials in parts by weight: 45 parts of ethylene propylene diene monomer, 24 parts of Mg (OH), 5.5 parts of methacrylic acid, 2.5 parts of magnesium methacrylate, 0.9 part 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 acceptor, 20 parts of plasticizer and 1.5 parts of vulcanizing agent.
Example 4:
the invention provides a high-damping low-hardness halogen-free rubber material which comprises 40 parts of ethylene propylene diene monomer, 22 parts of Mg (OH), 5 parts of methacrylic acid, 2 parts of magnesium methacrylate, 0.5 part of ethylene vinyl acetate copolymer and 50 parts of acrylate rubber.
The invention also provides a preparation method for the high-damping low-hardness halogen-free rubber material, which comprises the following specific preparation steps:
the method comprises the following steps: weighing ethylene propylene diene monomer, placing the ethylene propylene diene monomer into an internal mixer for mixing, weighing Mg (OH) 2, placing the mixture into the internal mixer, mixing for 6min, slowly dropwise adding methacrylic acid into the internal mixer, mixing for 10min, adding magnesium methacrylate, and mixing for 10min to obtain master batch;
step two: uniformly mixing the master batch and the ethylene-vinyl acetate copolymer, heating to 120 ℃, adding the mixture on an open mill, and mixing for 4min to obtain a mixed colloid;
step three: and putting the mixed colloid into an open mill, discharging, placing the rubber sheet under air conditioning air, and cooling to 20-35 ℃ to obtain the halogen-free rubber material.
In a preferred embodiment: and step one, mixing the ethylene propylene diene monomer rubber in an internal mixer, wherein the temperature of the internal mixer is increased to 65 ℃, the mixing is carried out for 4min, and the rotating speed is 34r/min.
In a preferred embodiment: the roll spacing of the open mill in the third step is 2.5mm, the roll temperature is controlled to be 40 ℃, the thin passing is carried out for 6 times, and then the roll spacing of the open mill is 3.5mm.
Example 5:
a rubber material comprises 50 parts of acrylate rubber, 20 parts of reinforcing agent, 2 parts of anti-aging agent, 2 parts of acid acceptor, 15 parts of plasticizer, 1 part of vulcanizing agent and 40 parts of ethylene propylene diene monomer.
The invention also provides a preparation method for the high-damping low-hardness halogen-free rubber material, which comprises the following specific preparation steps:
the method comprises the following steps: weighing the olefine acid ester rubber, adding the olefine acid ester rubber into an internal mixer for mixing, weighing the reinforcing agent, the anti-aging agent and the acid-absorbing agent, adding the reinforcing agent, the anti-aging agent and the acid-absorbing agent into the internal mixer, adjusting the rotating speed to 45 r/min, mixing to 73 ℃, weighing the plasticizer, adding the plasticizer into the internal mixer, mixing to 85 ℃, weighing the vulcanizing agent, adding the vulcanizing agent into the internal mixer, and mixing to 95 ℃ to obtain a second mixture;
step two: and putting the mixed colloid into an open mill, discharging, placing the rubber sheet under air conditioning air, and cooling to 30 ℃ to obtain the halogen-free rubber material.
In a preferred embodiment: and step one, adding the acrylate rubber into an internal mixer for mixing, wherein the rotating speed of the internal mixer is adjusted to 33r/min, the temperature is 53 ℃, and the mixing time is 7min.
In a preferred embodiment: in the first step, the reinforcing agent is one of carbon black and silicon dioxide.
In a preferred embodiment: in the first step, the plasticizer is polyester resin, and the molecular weight is 1-3 ten thousand.
In a preferred embodiment: and in the second step, the roll spacing of the open mill is 2.5mm, the roll temperature is controlled to be 40 ℃, the thin passing is carried out for 6 times, and then the roll spacing of the open mill is 3.5mm.
Comparative example:
the invention provides a rubber material which comprises 50 parts of acrylate rubber and 40 parts of ethylene propylene diene monomer.
The invention also provides a preparation method for the high-damping low-hardness halogen-free rubber material, which comprises the following specific preparation steps:
the method comprises the following steps: weighing the olefine acid ester rubber, adding the olefine acid ester rubber into an internal mixer for mixing, weighing the ethylene propylene diene monomer rubber, adding the ethylene propylene diene monomer rubber into the internal mixer for mixing, heating the temperature of the internal mixer to 65 ℃, mixing for 4min, and rotating at the speed of 34r/min, taking out the mixed colloid in the internal mixer, adding the mixed colloid into an open mill, discharging sheets, and placing the rubber sheet under air conditioning air to cool to 30 ℃ to obtain the halogen-free rubber material.
In a preferred embodiment: in the first step, the roll spacing of the open mill is 2.5mm, the roll temperature is controlled to be 40 ℃, the thin passing is carried out for 6 times, and then the roll spacing of the open mill is 3.5mm.
The sources of the raw materials in the above examples and comparative examples are: the acrylate rubber is produced by Beijing lingbao technologies, inc. and brand HMH, the carbon black is produced by Shanghai-source leaf technologies, inc. and has a product number of S42095-5G, the silica is produced by Sigma aldrich (Shanghai) trade, inc. and has a product number of S5631-1KG, the antioxidant 445 is produced by Wuhan Haishan technologies, inc. and has a product number of 445, the antioxidant ODA is produced by Shanghai Yi En chemical technologies, inc. and has a product number of R049919-1G, the antioxidant RD is produced by Shanghai Yi En chemical technologies, inc. and has a product number of R054771-100G, the salt of hexamethylenedicarbamate is produced by Wuhan Carnoz technologies, inc. and has a product number of 8598479, the magnesium oxide is produced by Sigma aldrich and has a product number of 63089-50G-F, hydrated stone, calcium oxide is produced by Sigma Aldrich (Shanghai) trade company Limited and has a product number of 634182-25G, antimony oxide is produced by Shanghai Yi En chemical technology company Limited and has a product number of R052323-1G, polyester resin is produced by Guangdong Etsiest New Material company Limited and has a CAS number of 25135-73-3, ethylene propylene diene monomer is produced by Dongguan Donggao Plastic Material company Limited and has a product number of IP3720P, mg (OH) 2 is produced by Nantong Runfo petrochemical company Limited and has a product number of 1309-42-8, methacrylic acid is produced by Sigma Aldrich (Shanghai) trade company Limited and has a product number of 155721-5G, magnesium methacrylate is produced by Wuhanhao Rong biological technology company Limited and has a product number of Hao technology, and ethylene vinyl acetate copolymer is produced by Chongqing Rui Yao biological technology company Limited and has a product number of 247-78-938.
Taking the rubber materials prepared in the above examples 1-5 as an experimental group 1, an experimental group 2, an experimental group 3, an experimental group 4 and an experimental group 5 respectively, selecting a halogen-free rubber material for high damping and low hardness produced in a comparative example as a control group, and testing the hardness, damping coefficient, halogen content, ROHS and oxygen index of the selected rubber material, (testing the oxygen index according to GB/T10707-2008, testing the hardness on an LX-a type rubber hardness tester according to GB530-83, testing the damping performance of the rubber material according to GBT 18258-2000, and testing and recording the halogen content of the rubber material according to IEC 62321), wherein the test results are as shown in table one:
watch 1
It can be seen from the table one that the rubber material produced by the present invention has higher safety performance and damping coefficient, example 4 is compared with example 1 without adding reinforcing agent, anti-aging agent, acid absorbing agent, plasticizer, vulcanizing agent, example 5 is compared with example 1 without adding Mg (OH) 2, methacrylic acid, magnesium methacrylate, ethylene vinyl acetate copolymer, by excluding materials that can contain halogen such as active chlorine acrylate, chlorinated/brominated butyl rubber, etc., so that halogen is avoided in the rubber material, high damping coefficient can be obtained by using acrylate monomer, on one hand, reasonable mooney value and glass transition temperature are controlled, on the other hand, plasticizer with large cohesive energy is added, thereby obtaining rubber material with high damping coefficient, the damping coefficient greatly exceeds the level of common material, the damping peak can be moved to higher temperature by adding carbon black, and the elastic modulus thereof is improved, when sheet is kneaded out on an open mill, the plasticizer used as damping rubber widens the damping transition region, it is ensured that the halogen-free rubber material has both better damping performance and very high modulus, one polymer of acrylate rubber has a polymer formed with a binary polymer system having excellent damping performance, and a very high damping loss factor is formed by adding a polar functional compound such as a polar molecule, and a polar molecule, on the polar molecule of ethylene propylene rubber material, and a polar molecule of the polar molecule are added, and the polar molecule of the polar compound with a very high loss factor, and the same level of the same, after methacrylic acid is added in a low-temperature mixing stage, the methacrylic acid reacts with Mg (OH) 2 to generate magnesium methacrylate, in a high-temperature vulcanization stage, the magnesium methacrylate can obviously improve the interaction between ethylene propylene diene monomer and Mg (OH) 2, so that the magnesium methacrylate is polymerized and grafted to the main chain of the ethylene propylene diene monomer, the mechanical property and the flame retardant property of the rubber material are improved, the tensile strength and the oxygen index of the Mg (OH) 2 high-filled ethylene propylene diene monomer can be improved through an ethylene vinyl acetate copolymer, the oxygen index of the rubber material is improved, namely the oxygen content is reduced, so that the flame retardant capability of the rubber material is improved, and the acrylate rubber is adopted as a wide-temperature-range high-damping material to be matched with hexamethylenediamine carbamate, so that the vulcanized rubber material has higher tearing strength and definite elongation stress, is lower in hardness and is softer.
And finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. A halogen-free rubber material with high damping and low hardness is characterized in that: the feed comprises the following raw materials in parts by weight: 40-50 parts of ethylene propylene diene monomer, 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, 2-4 parts of acid absorbent, 15-25 parts of plasticizer and 1-2 parts of vulcanizing agent.
2. The halogen-free rubber material with high damping and low hardness as claimed in claim 1, wherein: the feed comprises the following raw materials in parts by weight: 35-55 parts of ethylene propylene diene monomer, 21-7 parts of Mg (OH), 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 of anti-aging agent, 1-5 parts of acid absorbent, 11-29 parts of plasticizer and 0.5-4 parts of vulcanizing agent.
3. The halogen-free rubber material with high damping and low hardness as claimed in claim 1, wherein: the feed comprises the following raw materials in parts by weight: 43-48 parts of ethylene propylene diene monomer, 23-4 parts of Mg (OH), 5.1-5.9 parts of methacrylic acid, 2.5-2.8 parts of magnesium methacrylate, 0.6-0.9 part of ethylene vinyl acetate copolymer, 52-58 parts of acrylate rubber, 22-29 parts of reinforcing agent, 2.2-2.9 parts of anti-aging agent, 2.5-3.5 parts of acid absorbent, 16-23 parts of plasticizer and 1.2-1.8 parts of vulcanizing agent.
4. The halogen-free rubber material with high damping and low hardness as claimed in claim 1, wherein: the Mooney viscosity of the acrylate rubber is 20-80MU, the glass transition temperature is-10 to-1 ℃, the antioxidant is any one of an antioxidant 445, an antioxidant ODA and an antioxidant RD, the vulcanizing agent is hexamethylene diamine carbamate, and the acid-absorbing agent is any one of magnesium oxide, calcium oxide and antimony oxide.
5. A preparation method for a high-damping low-hardness halogen-free rubber material is characterized by comprising the following steps of: the preparation method comprises the following specific steps:
the method comprises the following steps: weighing ethylene propylene diene monomer, placing the ethylene propylene diene monomer into an internal mixer for mixing, weighing Mg (OH) 2, placing the mixture into the internal mixer, mixing for 5-8min, slowly dropwise adding methacrylic acid into the internal mixer, mixing for 8-12min, adding magnesium methacrylate, and mixing for 8-12min to obtain master batch;
step two: uniformly mixing the master batch and the ethylene-vinyl acetate copolymer, heating to 110-130 ℃, adding the mixture on an open mill, and mixing for 2-5min to obtain a mixture I;
step three: weighing olefine acid ester rubber, adding the olefine acid ester rubber into an internal mixer for mixing, weighing reinforcing agent, anti-aging agent and acid-absorbing agent, adding the mixture into the internal mixer, adjusting the rotating speed to 40-50 r/min, mixing to 70-76 ℃, weighing plasticizer, adding the plasticizer into the internal mixer, mixing to 80-90 ℃, weighing vulcanizing agent, adding the vulcanizing agent into the internal mixer, mixing to 90-100 ℃ to obtain a mixture II;
step four: and uniformly mixing the mixture I and the mixture II to obtain a mixed colloid, putting the mixed colloid into an open mill, discharging, and placing the rubber sheet under air conditioning air to cool to 20-35 ℃ to obtain the halogen-free rubber material.
6. The preparation method of the halogen-free rubber material with high damping and low hardness as claimed in claim 5, wherein the preparation method comprises the following steps: and step one, mixing the ethylene propylene diene monomer rubber in an internal mixer, wherein the temperature of the internal mixer is increased to 60-70 ℃, the mixing is carried out for 2-5min, and the rotating speed is 32-35r/min.
7. The preparation method of the halogen-free rubber material with high damping and low hardness as claimed in claim 5, wherein the preparation method comprises the following steps: and adding the triacrylate rubber into an internal mixer for mixing, wherein the rotating speed of the internal mixer is adjusted to be 30-35r/min, the temperature is 50-55 ℃, and the mixing time is 5-10min.
8. The preparation method of the halogen-free rubber material with high damping and low hardness as claimed in claim 5, wherein the preparation method comprises the following steps: and the reinforcing agent in the third step is one of carbon black and silicon dioxide.
9. The preparation method of the halogen-free rubber material with high damping and low hardness as claimed in claim 5, wherein the preparation method comprises the following steps: the plasticizer in the third step is polyester resin, and the molecular weight is 1-3 ten thousand.
10. The preparation method of the halogen-free rubber material with high damping and low hardness as claimed in claim 5, wherein the preparation method comprises the following steps: in the fourth step, the roller distance of the open mill is 2-3mm, the roller temperature is controlled to be 5-60 ℃, the thin passing is carried out for 6 times, and then the roller distance of the open mill is 3-4mm.
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