CN111793362A - Fireproof damping silicone rubber and preparation method thereof - Google Patents
Fireproof damping silicone rubber and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of rubber products, and particularly relates to fireproof damping silicon rubber and a preparation method thereof, wherein the fireproof damping silicon rubber comprises the following components in parts by weight: 155 portions of base material 115-containing material, 10-15 portions of ceramifiable filler, 7-13 portions of fluxing agent, 3-8 portions of reinforcing agent and 1-2 portions of vulcanizing agent; the base material is phenyl silicone rubber; the ceramifiable filler is a montmorillonite modified material; the fluxing agent is red mud, calcium oxide, lithium carbonate and potassium chloride; the silicon rubber has excellent fireproof and flame-retardant properties, high temperature resistance, water resistance, oxidation resistance, mechanical properties, crusting properties, softening resistance and low temperature resistance, is difficult to generate obvious cracks, does not crack or peel when meeting mechanical vibration and water drenching, and can be applied to extreme environments.
Description
Technical Field
The invention belongs to the technical field of rubber products, and particularly relates to fireproof damping silicone rubber and a preparation method thereof.
Background
The silicon rubber is widely applied to national defense, medical treatment and health, industrial and agricultural production and daily life of people, plays an increasingly important role in modern medicine, and in addition, smoke generated in the combustion process of a silicon rubber matrix is mainly CO generated by combustion of side chain groups2And H2O, no toxic gas is generated, and no pollution is generated to the environment, so that the method is applied to mass production.
In recent years, with the continuous increase of public transportation facilities, fire safety is increasingly important, the magnesium oxide mineral insulation fireproof cable and the mica tape wrapped inorganic insulation fireproof cable are mainly used as the domestic and foreign fireproof cables, and the mineral insulation fireproof cable has good fireproof performance, but has the disadvantages of complex manufacturing process, high production cost, high construction difficulty and difficulty in wide application. Although the mica tape wrapped fire-resistant cable is simple in process, the mica tape generally has a defect that the mica tape becomes brittle after high-temperature combustion, is easy to pulverize and fall off after severe vibration, and causes poor fire-resistant effect, so that a fire-resistant and flame-retardant material is urgently needed to be researched to provide a greater guarantee for fire safety.
Although the silicone rubber has excellent mechanical property, high temperature resistance, insulating property and the like, the interaction force among raw silicone rubber molecules is weak, and molecular chains are extremely unstable, so that various performances of the silicone rubber are poor, and patent CN104817844A discloses a fireproof heat-insulating silicone rubber which comprises the following components in percentage by mass: 45-55% of base material, 10-15% of high temperature resistant functional filler, 15-25% of flame retardant, 10-20% of reinforcing agent and 1-5% of other auxiliary agents, wherein the sum of the percentages of the components is 100%, although the silicone rubber product has fireproof and heat-insulating properties, the hardness and tensile strength are poor, if the mechanical properties are low, the wrapping layer can crack and peel when the silicone rubber product is vibrated or showered by water in a fire scene, the normal work of a line cannot be ensured, or the crack is generated to enable water to dip into an electric wire, so that short circuit is easy to occur.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides fireproof damping silicon rubber and a processing method thereof.
The method is realized by the following technical scheme:
one purpose of the invention is to provide fireproof damping silicone rubber which comprises the following components in parts by weight: 155 portions of base material 115-containing material, 10-15 portions of ceramifiable filler, 7-13 portions of fluxing agent, 3-8 portions of reinforcing agent and 1-2 portions of vulcanizing agent; the base material is phenyl silicone rubber; the ceramifiable filler is a montmorillonite modified material; the fluxing agent is red mud, calcium oxide, lithium carbonate and potassium chloride; the reinforcing agent is hydroxyapatite or serpentine powder.
Preferably, the fluxing agent consists of the following components in parts by weight: 10-30 parts of red mud, 5-11 parts of calcium oxide, 2-6 parts of lithium carbonate and 1-7 parts of potassium chloride.
Preferably, the reinforcing agent consists of the following components in parts by weight: 4-13 parts of hydroxyapatite and 3-9 parts of serpentine powder.
The vulcanizing agent is any one or more of benzoyl peroxide, 2, 4-dichlorobenzoyl peroxide, tert-butyl perbenzoate, dicumyl peroxide and di-tert-butyl peroxide.
The preparation method of the montmorillonite modified material comprises the following steps: placing polyvinyl alcohol in water, heating to 85 ℃, stirring until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution with the mass concentration of 10-20%, adding montmorillonite into the polyvinyl alcohol solution until the mass concentration of the montmorillonite is 70-80%, uniformly mixing, heating to 130 ℃ at the speed of 5-10 ℃/min under the protection of nitrogen, carrying out heat preservation reaction for 1-1.5h, and cooling to obtain the montmorillonite modified material.
According to the invention, montmorillonite is used as a ceramizable filler, so that the thermal stability, flame retardance and fire resistance of a silicon rubber material can be improved, and the surface polarity of the montmorillonite is modified by polyvinyl alcohol, so that the vulcanization time can be effectively reduced, the processing performance of the montmorillonite is improved, and the ignition resistance is improved; moreover, the montmorillonite modified material introduced into the silicon rubber matrix also has the function of gas barrier, and can prevent the air from permeating.
The preparation method of the serpentine powder comprises the following steps: according to the material-liquid ratio of 1: (3-5) dispersing 100-mesh serpentine powder in deionized water, ultrasonically dispersing for 10-30min while stirring, heating to 50-90 ℃, adding a melamine solution into the slurry, reacting for 5-8min while keeping the temperature, reacting for 1-3min under the microwave condition of 100-300W, and drying and crushing the product after the reaction is finished.
The concentration of the melamine solution is 20-30%, and the addition amount of the melamine solution is 10-20% of the mass of the serpentine powder.
According to the invention, the serpentine powder is used as a reinforcing agent, so that the silicone rubber has good water resistance and hydrophobicity, inhibits the adsorption effect of hydrophilic functional groups on water, and has a fluxing action, so that the melting point of a mixture in the preparation process can be reduced; the serpentine powder is modified by melamine, so that the problem of poor thermal sensitivity of serpentine minerals is solved, and the surface potential of serpentine is reduced.
The invention uses hydroxyapatite as a reinforcing agent, improves the heat-resistant and fireproof performance of the silicon rubber, simultaneously improves the biocompatibility of the system and provides active sites, thereby being beneficial to enhancing the binding capacity between materials and improving the melt mobility, and leading magnesium oxide to be fixed in crystal lattices.
According to the invention, the serpentine powder and the hydroxyapatite are selected as the reinforcing agent, so that the internal friction of the material can be increased, the molecular chain deformation can be delayed, the compatibility of a material system can be improved, and the effect of improving the damping performance can be further achieved.
The invention utilizes the red mud, calcium oxide, lithium carbonate and potassium chloride as fluxing agents, can effectively reduce the melting temperature, simultaneously realizes the utilization of industrial solid wastes, particularly converts the red mud into a glass phase in the sintering process, effectively reduces the melting temperature of a mixture, and simultaneously improves the shock absorption performance of the material because a glass transition region is widened.
One of the purposes of the invention is to provide a preparation method of fireproof damping silicon rubber, which comprises the following steps:
A. mixing the ceramizable filler and the reinforcing agent, heating to the temperature of 500-700 ℃, carrying out heat preservation treatment for 30-45min, grinding to a 600-mesh sieve, and carrying out plasma treatment for 3-7 min;
B. adding base material and fluxing agent components by using a double-roll open mill at 63-68 ℃, heating to 160-170 ℃, mixing for 45-50min, then adding the product obtained in the step A, cooling to 110-130 ℃, vacuumizing, mixing for 1-2h, naturally cooling, slicing on the open mill for several times, and adding a vulcanizing agent for vulcanizing;
the plasma treatment comprises the following process conditions: the nitrogen is used as the processing atmosphere, the processing power is 200- & lt300 & gt W, and the nitrogen flow is 0.1-0.2 NL/min.
The vacuum pressure of the vacuum pumping mixing is-0.05 Mpa to-0.02 Mpa.
The vulcanization is carried out on a plate vulcanizing machine at 190 ℃ and 170 ℃ for 5-20min under 8-16 MPa.
The invention adopts a cooling and mixing method after adding the porcelainized filler and the reinforcing agent, is beneficial to coating the porcelainized filler and the reinforcing agent on the surface of the matrix, and forms a surface film under the action of the vulcanizing agent, thereby changing the surface property of a core body and leading the finished product to have antistatic effect.
The invention mixes and sinters the ceramizable filler and the reinforcing agent and then utilizes plasma treatment to realize rapid and uniform nitrogen doping and is beneficial to a silicon nitride protective layer on the surface of a substrate in the melting process.
The invention reduces the vulcanization process condition by selecting and controlling the ceramizable filler, the reinforcing agent and the fluxing agent, and can realize the synthesis of the silicon rubber by one-stage vulcanization.
One of the purposes of the invention is to provide the fireproof and shock-absorbing silicon rubber used as a cable.
The invention aims to provide the fireproof and shock-absorbing silicon rubber used as a plugging material and a complete denture repairing material.
Has the advantages that:
the silicone rubber has excellent fireproof and flame retardant properties, high temperature resistance, water resistance, oxidation resistance, mechanical properties, crusting properties, softening resistance and low temperature resistance, is difficult to generate obvious cracks, does not crack or peel when meeting mechanical shock and water drenching, and can be applied to extreme environments.
Detailed Description
The following is a detailed description of the embodiments of the present invention, but the present invention is not limited to these embodiments, and any modifications or substitutions in the basic spirit of the embodiments are included in the scope of the present invention as claimed in the claims.
Example 1
A fireproof shock-absorbing silicone rubber comprises the following components: 155g of base material, 15g of ceramifiable filler, 13g of fluxing agent, 8g of reinforcing agent and 2g of vulcanizing agent;
the base material is phenyl silicone rubber;
the ceramifiable filler is a montmorillonite modified material;
the fluxing agent consists of the following components: 30g of red mud, 11g of calcium oxide, 6g of lithium carbonate and 7g of potassium chloride;
the reinforcing agent consists of the following components: 13g of hydroxyapatite and 9g of serpentine powder;
the vulcanizing agent is benzoyl peroxide;
the preparation method of the montmorillonite modified material comprises the following steps: placing polyvinyl alcohol in water, heating to 85 ℃, stirring until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution with the mass concentration of 20%, adding montmorillonite into the polyvinyl alcohol solution until the mass concentration of the montmorillonite is 80%, uniformly mixing, heating to 130 ℃ at the speed of 10 ℃/min under the protection of nitrogen, carrying out heat preservation reaction for 1.5h, and cooling to obtain a montmorillonite modified material; the concentration of the melamine solution is 30%, and the addition amount of the melamine solution is 20% of the mass of the serpentine powder;
one of the purposes of the invention is to provide a preparation method of fireproof damping silicon rubber, which comprises the following steps:
A. mixing the ceramifiable filler and the reinforcing agent, heating to 700 ℃, carrying out heat preservation treatment for 45min, grinding to a 600-mesh sieve, and carrying out plasma treatment for 3-7 min; the plasma treatment comprises the following process conditions: the nitrogen is used as a treatment atmosphere, the treatment power is 300W, and the nitrogen flow is 0.2 NL/min;
B. and (2) adding the base material and the fluxing agent component by using a double-roll open mill at 68 ℃, heating to 170 ℃, mixing for 45-50min, then adding the product obtained in the step A, cooling to 130 ℃, vacuumizing, mixing for 2h under the vacuum pressure of-0.02 MPa, naturally cooling, slicing on the open mill for several times, adding a vulcanizing agent, and vulcanizing for 20min at 190 ℃ and 16MPa on a flat vulcanizing machine.
Example 2
A fireproof shock-absorbing silicone rubber comprises the following components: 115g of base material, 10g of ceramifiable filler, 7g of fluxing agent, 3g of reinforcing agent and 1g of vulcanizing agent;
the base material is phenyl silicone rubber;
the ceramifiable filler is a montmorillonite modified material;
the fluxing agent consists of the following components: 10g of red mud, 5g of calcium oxide, 2g of lithium carbonate and 1g of potassium chloride;
the reinforcing agent consists of the following components: 4g of hydroxyapatite and 3g of serpentine powder;
the vulcanizing agent is dicumyl peroxide;
the preparation method of the montmorillonite modified material comprises the following steps: placing polyvinyl alcohol in water, heating to 85 ℃, stirring until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution with the mass concentration of 10%, adding montmorillonite into the polyvinyl alcohol solution until the mass concentration of the montmorillonite is 70%, uniformly mixing, heating to 130 ℃ at the speed of 5 ℃/min under the protection of nitrogen, carrying out heat preservation reaction for 1h, and cooling to obtain a montmorillonite modified material; the concentration of the melamine solution is 20%, and the addition amount of the melamine solution is 10% of the mass of the serpentine powder;
a preparation method of fireproof shock-absorbing silicone rubber comprises the following steps:
A. mixing the ceramifiable filler and the reinforcing agent, heating to 500 ℃, carrying out heat preservation treatment for 30min, grinding to a 600-mesh sieve, and carrying out plasma treatment for 3 min; the plasma treatment comprises the following process conditions: the nitrogen is used as a treatment atmosphere, the treatment power is 200W, and the nitrogen flow is 0.1 NL/min;
B. and (2) adding the base material and the fluxing agent component by using a double-roll open mill at 63 ℃, heating to 160 ℃, mixing for 45-50min, then adding the product obtained in the step A, cooling to 110 ℃, vacuumizing, mixing for 1h under the vacuum pressure of-0.05 Mpa, naturally cooling, slicing on the open mill for several times, adding a vulcanizing agent, and vulcanizing for 5min under the pressure of 8MPa on a flat vulcanizing machine at 170 ℃.
Example 3
A fireproof shock-absorbing silicone rubber comprises the following components: 135g of base material, 13g of ceramifiable filler, 10g of fluxing agent, 5g of reinforcing agent and 1.5g of vulcanizing agent;
the base material is phenyl silicone rubber;
the ceramifiable filler is a montmorillonite modified material;
the fluxing agent consists of the following components: 20g of red mud, 8g of calcium oxide, 4g of lithium carbonate and 4g of potassium chloride;
the reinforcing agent consists of the following components: 8g of hydroxyapatite and 5g of serpentine powder;
the vulcanizing agent is 2, 4-dichlorobenzoyl peroxide;
the preparation method of the montmorillonite modified material comprises the following steps: placing polyvinyl alcohol in water, heating to 85 ℃, stirring until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution with the mass concentration of 15%, adding montmorillonite into the polyvinyl alcohol solution until the mass concentration of the montmorillonite is 75%, uniformly mixing, heating to 130 ℃ at the speed of 8 ℃/min under the protection of nitrogen, carrying out heat preservation reaction for 1.1h, and cooling to obtain a montmorillonite modified material; the concentration of the melamine solution is 25%, and the addition amount of the melamine solution is 15% of the mass of the serpentine powder;
a preparation method of fireproof shock-absorbing silicone rubber comprises the following steps:
A. mixing the ceramifiable filler and the reinforcing agent, heating to 600 ℃, carrying out heat preservation treatment for 40min, grinding to 600-mesh sieve, and carrying out plasma treatment for 5 min; the plasma treatment comprises the following process conditions: nitrogen is taken as a treatment atmosphere, the treatment power is 250W, and the nitrogen flow is 0.15 NL/min;
B. adding the base material and the fluxing agent component by using a double-roll open mill at the temperature of 65 ℃, heating to 165 ℃ and mixing for 45-50min, then adding the product obtained in the step A, cooling to 120 ℃, vacuumizing, mixing for 1.5h under the vacuum pressure of-0.03 MPa, naturally cooling, slicing on the open mill for several times, adding a vulcanizing agent, and vulcanizing for 15min at the temperature of 180 ℃ and 12MPa on a flat vulcanizing machine.
Example 4
A fireproof shock-absorbing silicone rubber comprises the following components: 155g of base material, 10g of ceramifiable filler, 7g of fluxing agent, 3g of reinforcing agent and 2g of vulcanizing agent;
the base material is phenyl silicone rubber;
the ceramifiable filler is a montmorillonite modified material;
the fluxing agent consists of the following components: 30g of red mud, 5g of calcium oxide, 2g of lithium carbonate and 1g of potassium chloride;
the reinforcing agent consists of the following components: 4g of hydroxyapatite and 9g of serpentine powder;
the vulcanizing agent is a composition of benzoyl peroxide, 2, 4-dichlorobenzoyl peroxide, tert-butyl perbenzoate and di-tert-butyl peroxide in equal mass ratio;
the preparation method of the montmorillonite modified material comprises the following steps: placing polyvinyl alcohol in water, heating to 85 ℃, stirring until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution with the mass concentration of 13%, adding montmorillonite into the polyvinyl alcohol solution until the mass concentration of the montmorillonite is 78%, uniformly mixing, heating to 130 ℃ at the speed of 9 ℃/min under the protection of nitrogen, carrying out heat preservation reaction for 1.3h, and cooling to obtain a montmorillonite modified material; the concentration of the melamine solution is 25%, and the addition amount of the melamine solution is 15% of the mass of the serpentine powder;
a preparation method of fireproof shock-absorbing silicone rubber comprises the following steps:
A. mixing the ceramifiable filler and the reinforcing agent, heating to 550 ℃, carrying out heat preservation treatment for 30min, grinding to a 600-mesh sieve, and carrying out plasma treatment for 3 min; the plasma treatment comprises the following process conditions: the nitrogen is used as a treatment atmosphere, the treatment power is 300W, and the nitrogen flow is 0.1 NL/min;
B. and (2) adding the base material and the fluxing agent component by using a double-roll open mill at 63 ℃, heating to 170 ℃, mixing for-50 min, then adding the product obtained in the step A, cooling to 110 ℃, vacuumizing, mixing for 1.2h under the vacuum pressure of-0.02 MPa, naturally cooling, slicing on the open mill for several times, adding a vulcanizing agent, and vulcanizing for 7min at 185 ℃ and 10MPa on a flat vulcanizing machine.
Comparative example 1
On the basis of the embodiment 1, the difference from the embodiment 1 is that: the reinforcing agent adopts fumed silica and hydroxyl silicone oil with the mass of 10 percent of that of the fumed silica.
Comparative example 2
On the basis of the embodiment 2, the difference from the embodiment 2 is that: the cosolvent is not added with red mud.
Comparative example 3
On the basis of example 3, the difference from example 3 is that: the porcelainized filler adopts montmorillonite.
Comparative example 4
On the basis of the embodiment 4, the difference from the embodiment 4 is that: the preparation method of the fireproof damping silicone rubber comprises the following steps: adding a base material and a fluxing agent into a double-roll open mill at 63 ℃, heating to 170 ℃, mixing for-50 min, then adding a porcelainized filler and a reinforcing agent, cooling to 110 ℃, vacuumizing, mixing for 1.2h under the vacuum pressure of-0.02 MPa, naturally cooling, slicing on the open mill for several times, adding a vulcanizing agent, and vulcanizing for 7min on a flat vulcanizing machine at 185 ℃ and 10 MPa.
Comparative example 5
On the basis of the embodiment 2, the difference from the embodiment 2 is that: the preparation method of the fireproof damping silicon rubber does not utilize plasma treatment in the step A.
Comparative example 6
On the basis of example 3, the difference from example 3 is that: the reinforcing agent is only serpentine powder.
Test example 1
The silicone rubbers prepared in the examples and the comparative examples are prepared into flame-retardant silicone rubber cables (diameter: 1cm, length: 10cm) with metal cores embedded by adopting a hot-pressing method;
the thermal degradation behavior was carried out on a thermogravimetric analyzer TG209F3 from NETZSCH, Germany, at a test temperature of 50 ℃ and N2The heating rate is 10 ℃/min under the atmosphere;
testing a sample with a standard size according to the requirements of GB/T10707-;
according to the GB/T528-2009 standard of determination of tensile stress strain performance of vulcanized rubber or thermoplastic rubber, carrying out tensile strength on a sample by an electronic tensile testing machine, wherein the tensile rate is 200 mm/min;
testing the hardness by adopting an LX-A type Shore durometer according to GB/T531-1992, randomly selecting 5 points, and taking an average value;
the volume resistivity is tested according to GB/T1410-2006 by adopting a ZST-121 volume surface resistivity tester, and the test voltage is 500V; meanwhile, the inventors also performed tests using the original phenyl silicone rubber;
the results are as follows:
1. thermal degradation behavior: the 1% mass loss temperatures for each group are shown in table 1:
TABLE 1
| Item | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 |
| T/℃ | 547 | 536 | 561 | 554 | 413 |
| Item | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | Comparative example 6 |
| T/℃ | 289 | 501 | 467 | 511 | 356 |
2. The fire ratings for each group are shown in table 2;
TABLE 2
3. The tensile strength and hardness test results for each set are shown in table 3;
TABLE 3
4. The results of the set of reference resistivity tests are shown in table 4;
TABLE 4
Claims (10)
1. The fireproof damping silicon rubber is characterized by comprising the following components in parts by weight: 155 portions of base material 115-containing material, 10-15 portions of ceramifiable filler, 7-13 portions of fluxing agent, 3-8 portions of reinforcing agent and 1-2 portions of vulcanizing agent; the base material is phenyl silicone rubber; the ceramifiable filler is a montmorillonite modified material; the fluxing agent is red mud, calcium oxide, lithium carbonate and potassium chloride; the reinforcing agent is hydroxyapatite or serpentine powder.
2. The fireproof damping silicone rubber of claim 1, wherein the fluxing agent comprises the following components in parts by weight: 10-30 parts of red mud, 5-11 parts of calcium oxide, 2-6 parts of lithium carbonate and 1-7 parts of potassium chloride.
3. The fireproof damping silicone rubber of claim 1, wherein the reinforcing agent consists of the following components in parts by weight: 4-13 parts of hydroxyapatite and 3-9 parts of serpentine powder.
4. The fireproof shock-absorbing silicone rubber according to claim 1, wherein the vulcanizing agent is any one or more of benzoyl peroxide, 2, 4-dichlorobenzoyl peroxide, tert-butyl perbenzoate, dicumyl peroxide and di-tert-butyl peroxide.
5. The fireproof damping silicone rubber of claim 1, wherein the montmorillonite modified material is prepared by a method comprising: placing polyvinyl alcohol in water, heating to 85 ℃, stirring until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution with the mass concentration of 10-20%, adding montmorillonite into the polyvinyl alcohol solution until the mass concentration of the montmorillonite is 70-80%, uniformly mixing, heating to 130 ℃ at the speed of 5-10 ℃/min under the protection of nitrogen, carrying out heat preservation reaction for 1-1.5h, and cooling to obtain the montmorillonite modified material.
6. The fireproof damping silicone rubber according to claim 1 or 3, wherein the serpentine powder is prepared by the following steps: according to the material-liquid ratio of 1: (3-5) dispersing 100-mesh serpentine powder in deionized water, ultrasonically dispersing for 10-30min while stirring, heating to 50-90 ℃, adding a melamine solution into the slurry, reacting for 5-8min while keeping the temperature, reacting for 1-3min under the microwave condition of 100-300W, and drying and crushing the product after the reaction is finished.
7. The preparation method of the fireproof shock-absorbing silicone rubber according to claim 1, comprising the steps of:
A. mixing the ceramizable filler and the reinforcing agent, heating to the temperature of 500-700 ℃, carrying out heat preservation treatment for 30-45min, grinding to a 600-mesh sieve, and carrying out plasma treatment for 3-7 min;
B. and (2) adding the base material and the fluxing agent component by using a two-roll open mill at the temperature of 63-68 ℃, heating to 160-170 ℃, mixing for 45-50min, then adding the product obtained in the step A, cooling to 110-130 ℃, vacuumizing, mixing for 1-2h, naturally cooling, slicing on the open mill for thin pass for multiple times, and adding a vulcanizing agent for vulcanizing.
8. The preparation method of the fireproof damping silicone rubber according to claim 7, wherein the plasma treatment is carried out under the following process conditions: the nitrogen is used as the processing atmosphere, the processing power is 200- & lt300 & gt W, and the nitrogen flow is 0.1-0.2 NL/min.
9. The method for preparing fire-proof and shock-absorbing silicone rubber according to claim 7, wherein the vacuum pressure of the mixture is-0.05 Mpa to-0.02 Mpa.
10. The method for preparing the fireproof damping silicone rubber as defined in claim 7, wherein the vulcanization is carried out on a plate vulcanizing machine at 190 ℃ and 8-16MPa for 5-20 min.
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