CN108484991B - Rubber-based damping material and preparation method thereof - Google Patents
Rubber-based damping material and preparation method thereof Download PDFInfo
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- CN108484991B CN108484991B CN201810247595.9A CN201810247595A CN108484991B CN 108484991 B CN108484991 B CN 108484991B CN 201810247595 A CN201810247595 A CN 201810247595A CN 108484991 B CN108484991 B CN 108484991B
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
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- C08K3/20—Oxides; Hydroxides
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- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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Abstract
The invention provides a rubber-based damping material which is prepared from the following raw materials in parts by weight: 100 parts of rubber, 20-60 parts of filler, 0-10 parts of softener, 6-15 parts of vulcanization accelerator and 1-15 parts of vulcanizing agent; the rubber comprises natural rubber and epoxidized natural rubber; the epoxidized natural rubber comprises epoxidized natural rubber with the epoxy degree of less than or equal to 25 percent and epoxidized natural rubber with the epoxy degree of more than or equal to 30 percent. According to the records of the embodiments, the effective damping temperature range of the rubber-based damping material can reach 85 ℃ at most, the tensile property can reach 22.7MPa at most, the elongation at break can reach 785% at most, and the tensile strength of the rubber-based damping material at 18.7MPa and the elongation at break of the rubber-based damping material at 617% are both obviously improved compared with those of the prior art. The invention also provides a preparation method of the rubber-based damping material, and the method has the advantages of easily obtained raw materials and simple processing technology.
Description
Technical Field
The invention relates to the technical field of rubber materials, in particular to a rubber-based damping material and a preparation method thereof.
Background
The vibration generated by the mechanical motion can damage the machine, the service life of the machine is shortened, the generated noise pollutes the environment, and the shock absorption material becomes a hot spot of domestic and foreign research particularly along with the increase of the requirements of people on the living quality because of the frequent earthquake in recent years. In recent years, high damping materials are widely used in industries such as aerospace, automobiles, skyscrapers, household appliances and the like. And the natural rubber is widely applied to the fields of shock absorption and damping of buildings, bridges, rail transit, aerospace and the like due to excellent comprehensive mechanical properties. The design principle of the applied rubber damping material is as follows: the loss modulus is as high as possible, the storage modulus is low, and the effective damping range is wide. Effective damping is generally determined as tan greater than 0.3. Therefore, the rubber damping shock-absorbing material is designed by changing the morphological structure of the material, adopting a method of a polymer blending system and adding a compounding agent. The dynamic mechanical property is very important when preparing the damping material, and the dynamic damping property in the use temperature range is an important index for measuring the damping material.
At present, methods for improving the NR damping performance in China mainly comprise rubber materials and damping reinforcing agents for improving the damping performance of rubber. For example, Chinese patent 201310111532.8 discloses that butyl rubber and natural rubber are blended to prepare a damping material, which widens the effective damping range of the composite material, but has low mechanical properties. Therefore, the key point of research is how to realize the wide temperature range and high damping performance of rubber materials on the premise of ensuring the mechanical properties of the rubber materials.
Disclosure of Invention
The invention aims to provide a rubber-based damping material with wide temperature range and high damping performance and a preparation method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a rubber-based damping material which is prepared from the following raw materials in parts by weight:
the rubber comprises natural rubber and epoxidized natural rubber;
the epoxidized natural rubber comprises epoxidized natural rubber with the epoxy degree of less than or equal to 25 percent and epoxidized natural rubber with the epoxy degree of more than or equal to 30 percent.
Preferably, the mass ratio of the natural rubber to the epoxidized natural rubber in the rubber is (4-7): (3-6).
Preferably, in the epoxidized natural rubber, the mass ratio of the epoxidized natural rubber with the epoxy degree of less than or equal to 25% to the epoxidized natural rubber with the epoxy degree of more than or equal to 30% is 1: (1-3).
Preferably, the filler is one or more of carbon black, precipitated silica and fumed silica.
Preferably, the softening agent is one or more of aromatic oil, fatty hydrocarbon oil, naphthenic oil, engine oil and white oil.
Preferably, the vulcanization accelerator comprises the following components in parts by weight:
preferably, the vulcanizing agent is one or more of sulfur, sulfur monochloride, hydrogen peroxide vulcanizing agent, phenol formaldehyde resin vulcanizing agent and tert-butyl phenol formaldehyde resin vulcanizing agent.
The invention also provides a preparation method of the rubber-based damping material, which comprises the following steps:
carrying out first mixing on natural rubber and epoxidized natural rubber to obtain a rubber composition;
secondly mixing the rubber composition with a filler, a softener, a vulcanization accelerator and a vulcanizing agent to obtain a rubber compound;
and vulcanizing the rubber compound to obtain the rubber-based damping material.
Preferably, the temperature of the first mixing and the second mixing is 40-70 ℃ independently, and the time of the first mixing and the second mixing is 2-8 min independently.
Preferably, the vulcanization temperature is 140-180 ℃, the vulcanization pressure is 8-15 MPa, and the vulcanization time is 15-25 minutes.
The invention provides a rubber-based damping material which is prepared from the following raw materials in parts by weight: 100 parts of rubber, 20-60 parts of filler, 0-10 parts of softener, 6-15 parts of vulcanization accelerator and 1-15 parts of vulcanizing agent; the rubber comprises natural rubber and epoxidized natural rubber; the epoxidized natural rubber comprises epoxidized natural rubber with the epoxy degree of less than or equal to 25 percent and epoxidized natural rubber with the epoxy degree of more than or equal to 30 percent. The natural rubber is used as a matrix, the used epoxidized natural rubber is also prepared from natural rubber, partial performance of the natural rubber is reserved, and the epoxidized natural rubber also has polar groups, can interact with polar functional groups on carbon black or white carbon black, improves the dispersibility and the interface bonding property of the filler, and ensures that the finally obtained rubber-based damping material has excellent mechanical performance; meanwhile, the epoxidized natural rubber with low epoxidation degree is used together with the epoxidized natural rubber with high epoxidation degree, so that the effective damping temperature range of the finally obtained rubber-based damping material is improved. According to the records of the embodiments, the effective damping temperature range of the rubber-based damping material can reach 85 ℃ at most, the tensile property can reach 22.7MPa at most, the elongation at break can reach 785% at most, and the tensile strength of the rubber-based damping material at 18.7MPa and the elongation at break of the rubber-based damping material at 617% are both obviously improved compared with those of the prior art.
The invention also provides a preparation method of the rubber-based damping material, and the method has the advantages of easily obtained raw materials and simple processing technology.
Drawings
FIG. 1 is a dynamic mechanical temperature spectrum of the rubber-based damping material prepared in examples 1-2 and comparative example 1 of the present invention at 5 Hz.
Detailed Description
The invention provides a rubber-based damping material which is prepared from the following raw materials in parts by weight:
the rubber comprises natural rubber and epoxidized natural rubber;
the epoxidized natural rubber comprises epoxidized natural rubber with the epoxy degree of less than or equal to 25 percent and epoxidized natural rubber with the epoxy degree of more than or equal to 30 percent.
In the present invention, all the raw material components are commercially available products well known to those skilled in the art unless otherwise specified.
The rubber-based damping material provided by the invention comprises 100 parts by weight of rubber; the rubber includes natural rubber and epoxidized natural rubber. In the invention, the mass ratio of the natural rubber to the epoxidized natural rubber is preferably (4-7) to (3-6), and more preferably (5-6): (4-5).
In the invention, the epoxidized natural rubber comprises epoxidized natural rubber with the epoxy degree of less than or equal to 25 percent and epoxidized natural rubber with the epoxy degree of more than or equal to 30 percent. In the present invention, in the epoxidized natural rubber, the mass ratio of the epoxidized natural rubber having an epoxidization degree of not more than 25% to the epoxidized natural rubber having an epoxidization degree of not less than 30% is preferably 1: (1-3), more preferably 1: (1.5-2.5), most preferably 1: (1.8-2.2). In the invention, the epoxidized natural rubber with the epoxy degree of less than or equal to 25 percent is preferably one or more of epoxidized natural rubber with the epoxy degree of 10 percent (ENR-10), the epoxy degree of 20 percent (ENR-20) and the epoxy degree of 25 percent (ENR-25); when the epoxidized natural rubber with the epoxy degree of less than or equal to 25 percent is more than two of the specific choices, the proportion of the substances is not limited in any way, and the substances can be mixed according to any proportion. In the invention, the epoxidized natural rubber with the epoxy degree of more than or equal to 30 percent is preferably one or more of epoxidized natural rubber with the epoxy degree of 30 percent (ENR-30), epoxy degree of 40 percent (ENR-40) and epoxy degree of 50 percent (ENR-50); when the epoxidized natural rubber with the epoxidization degree of more than or equal to 30 percent is more than two of the specific choices, the invention has no special limitation on the proportion of each substance and can mix the substances according to any proportion.
The rubber-based damping material provided by the invention comprises 20-60 parts by weight of filler, preferably 30-50 parts by weight, and more preferably 35-45 parts by weight based on the mass of rubber. In the invention, the filler is preferably one or more of carbon black, precipitated silica and fumed silica; when the fillers are two or more selected from the above specific choices, the present invention does not have any particular limitation on the ratio of each substance, and the fillers may be mixed in any ratio. In the embodiment of the invention, 255 type precipitated silica is specifically adopted as the filler.
In the invention, the polar functional group of the filler can interact with the polar group in the epoxidized natural rubber, so that the dispersibility and the interfacial associativity of the filler in the rubber are improved, and the mechanical property of the rubber is further improved.
The rubber-based damping material provided by the invention comprises 0-10 parts by weight of a softening agent based on the mass of rubber, preferably 2-8 parts by weight, and more preferably 4-6 parts by weight. In the invention, the softening agent is one or more of aromatic oil, fatty hydrocarbon oil, naphthenic oil, engine oil and white oil; when the softening agent is two or more selected from the above specific choices, the present invention does not have any particular limitation on the ratio of each substance, and the substances may be mixed in any ratio.
In the invention, the softening agent can increase the plasticity of the rubber-based damping material, reduce the viscosity and the mixing temperature of the rubber-based damping material and improve the tensile strength, the elongation and the wear resistance of the rubber-based damping material.
The rubber-based damping material provided by the invention comprises 6-15 parts by weight of vulcanization accelerator based on the mass of rubber, preferably 8-13 parts by weight, and more preferably 10-12 parts by weight.
In the present invention, the vulcanization accelerator preferably includes 2.5 to 10 parts by weight of zinc oxide, 1 to 6 parts by weight of stearic acid, 1 to 3 parts by weight of a sulfonamide vulcanization accelerator, 0.5 to 2 parts by weight of a thiazole vulcanization accelerator, and 1 to 3 parts by weight of microcrystalline wax.
The vulcanization accelerator provided by the invention preferably comprises 2.5-10 parts by weight of zinc oxide, more preferably 4-8 parts by weight, and most preferably 5-6 parts by weight.
The vulcanization accelerator provided by the invention preferably contains 1-6 parts by weight of stearic acid, more preferably 2-5 parts by weight, and most preferably 3-4 parts by weight based on the mass of zinc oxide.
The vulcanization accelerator provided by the invention preferably comprises 1-3 parts by weight of sulfonamide vulcanization accelerator, more preferably 1.5-2.5 parts by weight based on the mass of zinc oxide. In the invention, the sulfonamide vulcanization accelerator is preferably one or more of N-cyclohexyl-2-benzothiazole sulfonamide, N- (oxydiethylene) -2-benzothiazole sulfonamide and N-tertiary butyl-2-benzothiazole sulfonamide; when the sulfonamide vulcanization accelerator is two or more selected from the above specific choices, the present invention does not have any particular limitation on the ratio of each substance, and the substances may be mixed in any ratio.
The vulcanization accelerator provided by the invention preferably comprises 0.5-2 parts by weight of thiazole vulcanization accelerator, more preferably 1-1.5 parts by weight based on the mass of zinc oxide. In the invention, the thiazole vulcanization accelerator is preferably one or more of 2,2' -dithiobenzothiazole, 2-mercaptobenzothiazole and 2- (2, 4-dinitrophenylthio) benzothiazole; when the thiazole vulcanization accelerator is two or more selected from the above specific choices, the present invention does not have any particular limitation on the ratio of each substance, and can mix them at any ratio.
The vulcanization accelerator provided by the invention preferably comprises 1-3 parts by weight of microcrystalline wax based on the mass of zinc oxide, and more preferably 1.5-2.5 parts by weight.
In the invention, the vulcanization accelerator can accelerate the vulcanization speed, shorten the vulcanization time, reduce the vulcanization temperature and reduce the dosage of the vulcanizing agent, and simultaneously can improve the physical and mechanical properties of vulcanized rubber and improve the crosslinking degree and the heat resistance of the rubber-based damping material.
The rubber-based damping material provided by the invention comprises 1-15 parts by weight of vulcanizing agent, preferably 3-12 parts by weight, and more preferably 5-8 parts by weight based on the mass of rubber. In the invention, the vulcanizing agent is one or more of sulfur, sulfur monochloride, hydrogen peroxide vulcanizing agent, phenol formaldehyde resin vulcanizing agent and tert-butyl phenol formaldehyde resin vulcanizing agent; when the vulcanizing agents are two or more selected from the above specific options, the proportions of the respective substances in the present invention are not particularly limited, and the substances may be mixed in any proportions.
The invention also provides a preparation method of the rubber-based damping material, which comprises the following steps:
carrying out first mixing on natural rubber and epoxidized natural rubber to obtain a rubber composition;
secondly mixing the rubber composition with a filler, a softener, a vulcanization accelerator and a vulcanizing agent to obtain a rubber compound;
and vulcanizing the rubber compound to obtain the rubber-based damping material.
The rubber composition is obtained by first mixing natural rubber and epoxidized natural rubber. In the invention, the temperature of the first mixing is preferably 40-70 ℃, more preferably 45-65 ℃, and most preferably 50-60 ℃; the first mixing time is preferably 2 to 8min, more preferably 3 to 7min, and most preferably 4 to 6 min.
After obtaining the rubber composition, the rubber composition is subjected to second mixing with a filler, a softener, a vulcanization accelerator and a vulcanizing agent to obtain a rubber compound. In the invention, the temperature of the second mixing is preferably 40-70 ℃, more preferably 45-65 ℃, and most preferably 50-60 ℃; the second mixing time is preferably 2 to 8min, more preferably 3 to 7min, and most preferably 4 to 6 min.
In the present invention, the first mixing and the second mixing are preferably performed in an open mill.
After the rubber compound is obtained, the rubber compound is vulcanized to obtain the rubber-based damping material. In the invention, the vulcanization temperature is preferably 140-180 ℃, more preferably 150-170 ℃, and most preferably 155-165 ℃; the vulcanization pressure is preferably 8-15 MPa, more preferably 9-13 MPa, and most preferably 10-11 MPa; the vulcanizing time is preferably 15 to 25 minutes, more preferably 18 to 23 minutes, and most preferably 20 to 22 minutes.
The rubber-based damping materials provided by the present invention will be described in detail with reference to the following examples, which should not be construed as limiting the scope of the present invention.
Example 1
60g of natural rubber, 20g of ENR-25 type epoxidized natural rubber and 20g of ENR-40 type epoxidized natural rubber were kneaded on an open mill at a temperature of 50 ℃ for 4 minutes to obtain a rubber composition;
then, under the same conditions, adding 40g of 255 type precipitated silica, 4g of aromatic oil, 5g of zinc oxide, 2g of stearic acid, 1.5g of N-cyclohexyl-2-benzothiazole sulfonamide, 0.5g of 2,2' -dithiodibenzothiazole, 1g of microcrystalline wax and 1.5g of sulfur into an open mill for mixing to obtain rubber compound;
and standing the mixed rubber for 12 hours, and vulcanizing the mixed rubber on a flat vulcanizing machine for 20 minutes at the temperature of 150 ℃ and under the pressure of 15MPa to obtain the rubber-based damping material.
Example 2
60g of natural rubber, 20g of ENR-20 type epoxidized natural rubber and 20g of ENR-50 type epoxidized natural rubber were kneaded on an open mill at a temperature of 50 ℃ for 4 minutes to obtain a rubber composition;
then, under the same conditions, adding 40g of 255 type precipitated silica, 4g of aromatic oil, 5g of zinc oxide, 2g of stearic acid, 1.5g of N-cyclohexyl-2-benzothiazole sulfonamide, 0.5g of 2,2' -dithiodibenzothiazole, 1g of microcrystalline wax and 1.5g of sulfur into an open mill for mixing to obtain rubber compound;
and standing the rubber compound for 12 hours, and vulcanizing the rubber compound for 20 minutes on a flat vulcanizing machine under the conditions of 150 ℃ and 15MPa to obtain the rubber-based damping material.
Example 3
Mixing 70g of natural rubber, 10g of ENR-20 type epoxidized natural rubber and 20g of ENR-50 type epoxidized natural rubber on an open mill at a temperature of 50 ℃ for 4 minutes to obtain a rubber composition;
then, under the same conditions, adding 40g of 255 type precipitated silica, 4g of aromatic oil, 5g of zinc oxide, 2g of stearic acid, 1.5g of N-cyclohexyl-2-benzothiazole sulfonamide, 0.5g of 2,2' -dithiodibenzothiazole, 1g of microcrystalline wax and 1.5g of sulfur into an open mill for mixing to obtain rubber compound;
and standing the rubber compound for 12 hours, and vulcanizing the rubber compound for 20 minutes on a flat vulcanizing machine under the conditions of 150 ℃ and 15MPa to obtain the rubber-based damping material.
Example 4
Mixing 70g of natural rubber, 10g of ENR-25 type epoxidized natural rubber and 20g of ENR-40 type epoxidized natural rubber in an open mill at 50 ℃ for 4 minutes to obtain a rubber composition;
then, under the same conditions, adding 40g of 255 type precipitated silica, 4g of aromatic oil, 5g of zinc oxide, 2g of stearic acid, 1.5g of N-cyclohexyl-2-benzothiazole sulfonamide, 0.5g of 2,2' -dithiodibenzothiazole, 1g of microcrystalline wax and 1.5g of sulfur into an open mill for mixing to obtain rubber compound;
and standing the rubber compound for 12 hours, and vulcanizing the rubber compound for 20 minutes on a flat vulcanizing machine under the conditions of 150 ℃ and 15MPa to obtain the rubber-based damping material.
Example 5
60g of natural rubber, 20g of ENR-25 type epoxidized natural rubber and 20g of ENR-40 type epoxidized natural rubber were kneaded on an open mill at a temperature of 60 ℃ for 4 minutes to obtain a rubber composition;
then under the same conditions, adding 40g of N330 type carbon black, 4g of aromatic oil, 5g of zinc oxide, 2g of stearic acid, 1.5g of N-cyclohexyl-2-benzothiazole sulfonamide, 0.5g of 2,2' -dithiodibenzothiazole, 1g of microcrystalline wax and 1.5g of sulfur into an open mill for mixing to obtain a rubber compound;
and standing the rubber compound for 12 hours, and vulcanizing the rubber compound for 20 minutes on a flat vulcanizing machine under the conditions of 150 ℃ and 15MPa to obtain the rubber-based damping material.
Example 6
60g of natural rubber, 20g of ENR-20 type epoxidized natural rubber and 20g of ENR-50 type epoxidized natural rubber were kneaded on an open mill at a temperature of 60 ℃ for 4 minutes to obtain a rubber composition;
then under the same conditions, adding 40g of N330 type carbon black, 4g of aromatic oil, 5g of zinc oxide, 2g of stearic acid, 1.5g of N-cyclohexyl-2-benzothiazole sulfonamide, 0.5g of 2,2' -dithiodibenzothiazole, 1g of microcrystalline wax and 1.5g of sulfur into an open mill for mixing to obtain a rubber compound;
and standing the rubber compound for 12 hours, and vulcanizing the rubber compound for 20 minutes on a flat vulcanizing machine under the conditions of 150 ℃ and 15MPa to obtain the rubber-based damping material.
Example 7
Mixing 70g of natural rubber, 10g of ENR-20 type epoxidized natural rubber and 20g of ENR-50 type epoxidized natural rubber in an open mill at 60 ℃ for 4 minutes to obtain a rubber composition;
then under the same conditions, adding 40g of N330 type carbon black, 4g of aromatic oil, 5g of zinc oxide, 2g of stearic acid, 1.5g of N-cyclohexyl-2-benzothiazole sulfonamide, 0.5g of 2,2' -dithiodibenzothiazole, 1g of microcrystalline wax and 1.5g of sulfur into an open mill for mixing to obtain a rubber compound;
and standing the rubber compound for 12 hours, and vulcanizing the rubber compound for 20 minutes on a flat vulcanizing machine under the conditions of 150 ℃ and 15MPa to obtain the rubber-based damping material.
Example 8
Mixing 70g of natural rubber, 10g of ENR-25 type epoxidized natural rubber and 20g of ENR-40 type epoxidized natural rubber in an open mill at 60 ℃ for 4 minutes to obtain a rubber composition;
then under the same conditions, adding 40g of N330 type carbon black, 4g of aromatic oil, 5g of zinc oxide, 2g of stearic acid, 1.5g of N-cyclohexyl-2-benzothiazole sulfonamide, 0.5g of 2,2' -dithiodibenzothiazole, 1g of microcrystalline wax and 1.5g of sulfur into an open mill for mixing to obtain a rubber compound;
and standing the rubber compound for 12 hours, and vulcanizing the rubber compound for 20 minutes on a flat vulcanizing machine under the conditions of 150 ℃ and 15MPa to obtain the rubber-based damping material.
Comparative example 1
Mixing 100g of natural rubber on an open mill for 4 minutes at the temperature of 50 ℃ to obtain mixed rubber;
then, under the same conditions, adding 40g of 255 type precipitated silica, 4g of aromatic oil, 5g of zinc oxide, 2g of stearic acid, 1.5g of N-cyclohexyl-2-benzothiazole sulfonamide, 0.5g of 2,2' -dithiodibenzothiazole, 1g of microcrystalline wax and 1.5g of sulfur into an open mill for mixing to obtain rubber compound;
and standing the mixed rubber for 12 hours, and vulcanizing the mixed rubber on a flat vulcanizing machine for 20 minutes at the temperature of 150 ℃ and under the pressure of 15MPa to obtain the rubber-based damping material.
Example 9
Testing the damping performance and the tensile performance of the rubber-based damping materials prepared in the embodiments 1-8 and the comparative example 1, wherein the tensile performance is tested according to GB/T528-2009; the damping performance is tested and analyzed under dynamic force by adopting a DMA242C type dynamic mechanical analyzer, and the test conditions are as follows: and in the stretching mode, the scanning temperature is-110-100 ℃, the heating rate is 5 ℃/min, and the test frequency is 1Hz, 5Hz and 10Hz respectively. The test results are shown in table 1:
TABLE 1 Performance data for rubber-based damping materials of examples 1-8 and comparative example 1
Fig. 1 is a dynamic mechanical temperature spectrum of the rubber-based damping material prepared in examples 1-2 and comparative example 1 of the present invention at 5Hz, wherein a curve 1 is the dynamic mechanical temperature spectrum of the rubber-based damping material prepared in comparative example 1, a curve 2 is the dynamic mechanical temperature spectrum of the rubber-based damping material prepared in example 1, and a curve 3 is the dynamic mechanical temperature spectrum of the rubber-based damping material prepared in example 2. As can be seen from figure 1, compared with a pure natural rubber matrix, the effective damping temperature range of the rubber-based damping material prepared by the method is obviously widened, the maximum effective damping temperature is expanded to 14 ℃, and is increased by 30 ℃ compared with the minus 16 ℃ of the natural rubber matrix.
The above examples show that the effective damping temperature range of the rubber-based damping material of the present invention can be up to 85 ℃, the tensile property can be up to 22.7MPa, and the elongation at break can be up to 785%, which are significantly improved compared with the tensile strength at 18.7MPa and the elongation at break 617% in comparative example 1.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (9)
1. The rubber-based damping material is prepared from the following raw materials in parts by weight:
the rubber comprises natural rubber and epoxidized natural rubber;
the epoxidized natural rubber comprises epoxidized natural rubber with the epoxy degree of less than or equal to 25 percent and epoxidized natural rubber with the epoxy degree of more than or equal to 30 percent;
in the epoxidized natural rubber, the mass ratio of the epoxidized natural rubber with the epoxy degree of less than or equal to 25 percent to the epoxidized natural rubber with the epoxy degree of more than or equal to 30 percent is 1: (1-3).
2. The rubber-based damping material of claim 1, wherein: the mass ratio of the natural rubber to the epoxidized natural rubber in the rubber is (4-7): (3-6).
3. The rubber-based damping material of claim 1, wherein: the filler is one or more of carbon black, precipitated white carbon black and gas-phase white carbon black.
4. The rubber-based damping material of claim 1, wherein: the softening agent is one or more of aromatic oil, fatty hydrocarbon oil, naphthenic oil, engine oil and white oil.
5. The rubber-based damping material of claim 1, wherein: the vulcanization accelerator comprises the following components in parts by weight:
6. the rubber-based damping material of claim 1, wherein: the vulcanizing agent is one or more of sulfur, sulfur monochloride, hydrogen peroxide vulcanizing agent, phenol formaldehyde resin vulcanizing agent and tert-butyl phenol formaldehyde resin vulcanizing agent.
7. The method for preparing the rubber-based damping material according to any one of claims 1 to 6, comprising the steps of:
carrying out first mixing on natural rubber and epoxidized natural rubber to obtain a rubber composition;
secondly mixing the rubber composition with a filler, a softener, a vulcanization accelerator and a vulcanizing agent to obtain a rubber compound;
and vulcanizing the rubber compound to obtain the rubber-based damping material.
8. The method of preparing a rubber-based damping material of claim 7, wherein: the temperature of the first mixing and the second mixing is 40-70 ℃ independently, and the time of the first mixing and the second mixing is 2-8 min independently.
9. The method of preparing a rubber-based damping material of claim 7, wherein: the vulcanizing temperature is 140-180 ℃, the vulcanizing pressure is 8-15 MPa, and the vulcanizing time is 15-25 minutes.
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| CN113563652A (en) * | 2021-07-22 | 2021-10-29 | 安徽誉林汽车部件有限公司 | Engine damping block rubber and preparation method thereof |
| CN113583265B (en) * | 2021-09-10 | 2024-01-19 | 中国热带农业科学院农产品加工研究所 | Vulcanized rubber and preparation method thereof |
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| JPH10219033A (en) * | 1997-02-12 | 1998-08-18 | Yokohama Rubber Co Ltd:The | Rubber composition for high-attenuation support |
| CN102775659A (en) * | 2012-07-16 | 2012-11-14 | 华南理工大学 | Method for preparing wide-temperature-range high-frequency high-damping rubber materials |
| CN106633216A (en) * | 2016-09-28 | 2017-05-10 | 华南理工大学 | Wide-temperature-range high-damping blended rubber material and preparation method therefor |
| CN107286413A (en) * | 2017-06-27 | 2017-10-24 | 宁波拓普集团股份有限公司 | A kind of preparation method of high damping cushion rubber |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10219033A (en) * | 1997-02-12 | 1998-08-18 | Yokohama Rubber Co Ltd:The | Rubber composition for high-attenuation support |
| CN102775659A (en) * | 2012-07-16 | 2012-11-14 | 华南理工大学 | Method for preparing wide-temperature-range high-frequency high-damping rubber materials |
| CN106633216A (en) * | 2016-09-28 | 2017-05-10 | 华南理工大学 | Wide-temperature-range high-damping blended rubber material and preparation method therefor |
| CN107286413A (en) * | 2017-06-27 | 2017-10-24 | 宁波拓普集团股份有限公司 | A kind of preparation method of high damping cushion rubber |
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