CN110396298B - Fireproof high-temperature-resistant organic silicon rubber material and preparation method thereof - Google Patents
Fireproof high-temperature-resistant organic silicon rubber material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a fireproof high-temperature-resistant organic silicon rubber material and a preparation method thereof. The method is characterized in that: the fireproof high-temperature-resistant rubber material is prepared from vinyl organic silicon rubber, metallic tin powder, wollastonite, white carbon black, hydroxyl silicone oil and a vulcanizing agent. The fireproof high-temperature-resistant rubber material is prepared by adding the porcelain forming filler comprising the metallic tin powder, the needle-shaped wollastonite and the white carbon black, and a new method is provided for preparing the fireproof high-temperature-resistant material. The preparation method of the fireproof high-temperature-resistant rubber material comprises the following steps: firstly, carrying out heat mixing on ceramic fillers such as silicon rubber, metallic tin powder, needle-shaped wollastonite, white carbon black and the like and auxiliaries in an internal mixer; secondly, adding a vulcanizing agent into the open mill, uniformly mixing and discharging. The invention has the advantages that: by adding the porcelain forming filler comprising the metal tin powder and the vulcanizing agent into the organic silicon rubber, the prepared organic silicon rubber material has good flame retardant property, and meanwhile, a ceramic body formed under a high-temperature condition is more compact, the preparation process is simple, the equipment requirement is low, and the organic silicon rubber material can be widely applied to fireproof and high-temperature resistant materials and fields.
Description
Technical Field
The silicon rubber is a high molecular elastomer with organic and inorganic characteristics, the main chain of the silicon rubber is a repeated-Si-O-unit, and the side group connected with a silicon atom has organic groups such as methyl, vinyl, phenyl and the like, so that the silicon rubber becomes a typical semi-organic semi-inorganic polymer and has a plurality of excellent properties such as high temperature resistance, low temperature resistance, electric insulation, weather resistance, chemical corrosion resistance and the like.
Background
The ceramic organosilicon material is a novel fireproof high-temperature resistant material, and is prepared by taking an organosilicon material as a matrix and adding a ceramic filler, an auxiliary agent and other functional fillers. The ceramic material is in a flexible common rubber state at room temperature, has good tensile property, and is converted into a dense and hard ceramic body from the rubber state under a high-temperature condition. The mechanism of ceramic formation of the ceramic organic silicon material mainly comprisesTwo processes are as follows: a) at a lower temperature, the inorganic ceramic filler is uniformly dispersed in the silicon rubber matrix; b) when exposed to high temperature, the organosilicon is decomposed into SiO2The fluxing agent in the porcelain-forming filler begins to melt, and a liquid-phase eutectic body is formed at the edge of the filler, so that SiO2Eutectic reaction is carried out between the SiO and the porcelain forming filler, and the SiO is subjected to the eutectic reaction along with the rise of the firing temperature and the extension of the firing time2The particles form "bridges" with the filler, thereby forming an inorganic ceramic body.
In order to obtain a ceramic organic silicon material with excellent mechanical properties at room temperature, high temperature resistance, flame retardance, fast porcelain forming and high porcelain strength, a great deal of research is carried out at home and abroad. For example, Li funjian and the like research the influence of the types and the use amounts of the white carbon black on the three-point bending strength, the compression strength, the ablation mass loss rate and the ablation linear shrinkage rate of a ceramic body formed by the ceramization of the silicon rubber, and the result shows that compared with the silicon rubber added with the precipitated white carbon black, the three-point bending strength and the compression strength of the ceramic body formed by the silicon rubber added with the gas phase method white carbon black are higher, the section of the ceramic body is more compact, the ceramization effect of the silicon rubber is better, and when the use amount of the gas phase method white carbon black is 40 parts, the maximum bending strength and the maximum compression strength of the ceramic body are respectively 14.1 MPa and 6.0 MPa; zenghao and the like take silicon rubber as a substrate, a ceramic silicon rubber material with flame retardant and fire resistance is prepared by adding glass powder and a flame retardant, the influence of magnesium hydroxide, aluminum hydroxide and zinc borate serving as the flame retardants on the porcelainizing performance of the silicon rubber is researched, the silicon rubber has the best flame retardance due to the addition of the zinc borate in 3 flame retardants, the limit oxygen index of a sample reaches 48%, the vertical combustion level reaches FV-0, the ceramic effect of the silicon rubber is more obvious due to the addition of the magnesium hydroxide, and the density, the water absorption and the bending strength of porcelainizing materials can respectively reach 1.63344 g/cm39.86% and 6.43 MPa; the results of the preparation of the ceramic flame-retardant silicone rubber composite material by using silicone rubber as a matrix and ammonium polyphosphate, calcium carbonate, mica and glass powder as additives show that the LOI value of the ceramic silicone rubber is 31.2 percent, the bending strength of a ceramic residue formed at 1000 ℃ is 19.7 MPa, the pore number is reduced along with the increase of the sintering temperature, a compact structure is formed, and the formed ceramic is made to have a high temperatureThe mechanical property is excellent at the temperature; hamdani and other researches find that the surface of a ceramic body obtained by the wollastonite-filled silicon rubber through ablation at 940 ℃ has only a few cracks, the volume shrinkage rate is only 7%, and scanning electron microscope photographs show that the surface of ablation residues containing wollastonite has a plurality of large wollastonite particles, and bridging phenomena exist between the wollastonite particles and residual silicon dioxide, so that the wollastonite promotes the silicon rubber to form a hard carbon layer in the ablation process, and the strength of the ablation residues is improved; m, Imiela and the like explore the ceramic organic silicon composite materials added with carbon fibers with different contents and study the representation of the ceramic structure and the thermal property thereof in the heat treatment process of the composite materials. The results show that the thermal stability of the fiber-filled composite material and the compressive strength of the ceramic body are improved, and when 5 parts of carbon fibers are filled, the compressive force of the ceramic body at 1000 ℃ is improved from 46.7N to 187.9N; chinese patent CN 109401634A discloses a ceramic organosilicon material with flame retardance and smoke suppression and a preparation method thereof, wherein the tensile strength is 4.0 Mpa, the elongation at break is 313%, the flame retardance meets UL94V-0, the obtained organosilicon material is ablated for 1 h in a muffle furnace at 900 ℃, and the three-point bending strength of the obtained flame-retardant and smoke suppression ceramic body can reach 9.9 MPa; chinese patent CN 107760039A discloses a ceramic flame-retardant fireproof silicone rubber and a preparation method thereof, wherein the silicone rubber comprises the following components in parts by weight: 100 parts of raw silicone rubber, 10-50 parts of white carbon black, 10-100 parts of aluminum hydroxide, 10-50 parts of low-melting-point glass powder, 10-100 parts of mica powder, 1-20 parts of hydroxyl silicone oil, 1-20 parts of hexamethyldisilazane, 0.1-3 parts of platinum compound and 0.1-5 parts of vulcanizing agent, the prepared ceramic flame-retardant fire-resistant silicone rubber has excellent flame retardance, can reach UL94V-0 grade, has the tensile strength of 4.2 MPa and the elongation at break of 231%, can not generate melt and droppings when being combusted at high temperature (600-1200 ℃), can form a hard and compact ceramic body after being combusted, and has the bending strength of 5.3 MPa; chinese patent CN 106009695A discloses a preparation method of high-strength ceramic silicon rubber, sericite powder and glass powder are used as fillers, the dispersibility of inorganic fillers in a silicon rubber matrix is improved by surface modification, and the inorganic fillers are blended with the rubber matrix and then are subjected to flat plate vulcanization hot-pressing forming, so that high-strength ceramic silicon rubber is obtainedThe preparation method of the rubber is characterized in that the addition of the modified glass powder enables a compact glass phase to be formed on the surface of the porcelain, the porcelain is compact and hard, and the defect of low strength of a ceramic layer after ablation is overcome.
Due to simple preparation process and simple and convenient equipment, the existing ceramic organic silicon rubber can be widely used for fireproof and high-temperature-resistant materials, thermal insulation layers, fireproof thermal insulation materials and cable protection circuits, and ceramic organic silicon rubber with different structural sizes can be designed according to requirements. For example, U.S. patent No. 4269757 discloses a silicone material capable of forming a ceramic body at high temperatures, comprising a silicone polymer, a ceramic-forming filler and a peroxide curing agent, which when heated to a temperature of 500 ℃ or higher, can be converted to a ceramic material, which is a lightweight ceramic material having excellent dimensional stability, strength, electrical insulating ability, and which can be used as an insulating coating for an electrically conductive substance; chinese patent CN 109467936A discloses porcelainizing fireproof heat-insulating foamed silicon rubber and a preparation method thereof, wherein the porcelainizing fireproof heat-insulating foamed silicon rubber comprises base rubber, porcelainizing filler (1000-mesh glass fiber powder), a platinum catalyst, a foaming agent, silicon oil and a vulcanizing agent, the base rubber is a rubber compound prepared from methyl vinyl silicon rubber, the foamed silicon rubber has good ceramic effect after ablation, has no surface crack and hard texture, keeps a complete foam structure, ensures that the volume retention rate is 85% or higher, and has excellent fireproof performance; chinese patent CN 109423202A discloses a chemical-process organosilicon heat-resistant coating and a preparation method thereof, wherein organosilicon resin is used as a film-forming material, and a silicon dioxide material, a special ceramic material, zinc phosphate and a fiber material are used as fillers to prepare a heat-insulating, anti-corrosion and heat-resistant paint, and the heat-resistant paint has the characteristics of heat resistance, oil resistance, moisture resistance, insulation, strong adhesive force, good mechanical property and the like after being cured, has a good heat-insulating effect, and can form a compact ceramic layer at high temperature; US patent US 20060155039 discloses a fire resistant silicone composite comprising a silicone polymer, mica, fluxing agents, which is suitable for use in fire wall linings, fire barriers, screens, ceilings or linings, structural fire protection, fire door inserts, door and window seals, intumescent seals, products formed in electrical distribution cabinets or cables; chinese patent CN 102850805A discloses a preparation method of a fire-resistant ceramic silicon rubber and an application thereof in electric wires and cables, wherein the rubber comprises 100 parts of methyl vinyl silicone rubber, 30-80 parts of white carbon black, 9-40 parts of alumina, 1.5-8 parts of a structure control agent, 3-5 parts of a sintering additive, 0.25-1.5 parts of a surface treatment agent and 0.5-2 parts of a cross-linking agent, and the fire-resistant silicon rubber material has the characteristics of compact ceramic body, stable structure, stable fire resistance, good insulating property and the like; the patent WO 2017070893 of the world intellectual property organization discloses a ceramic silicon rubber and a preparation method thereof, the ceramic silicon rubber is added with a high-efficiency flame-retardant catalyst, inorganic mineral powder, nano metal oxide and/or metal hydroxide, lamellar nano powder and other fillers in a silicon rubber system, the flame retardance of the obtained ceramic silicon rubber meets the UL94V-0 requirement, the ceramic can be formed at 400 ℃, and the power is not cut off after the cable is formed for 180 min at 950 ℃.
Although many documents report that the ceramifiable fireproof high-temperature-resistant organic silicon rubber material is used in different fields, including research on different matrixes and different ceramic forming fillers, the prepared material still has low ceramic forming strength in a high-temperature environment, and the integrity of a ceramic protective layer is damaged when the ceramifiable fireproof high-temperature-resistant organic silicon rubber material meets certain falling objects or is influenced by the self weight, so that the ceramifiable fireproof high-temperature-resistant organic silicon rubber material still needs to be further researched.
The patent provides a preparation method of fire-proof high temperature resistant organic silicon rubber material, through adding metallic tin powder (Sn), porcelain forming filler and vulcanizing agent in organic silicon rubber, the organic silicon rubber material of preparation not only has good flame retardant property, and the ceramic body that forms simultaneously under the high temperature condition is more compact, and the preparation process is simple, the equipment requirement is low, can wide application in fire-proof high temperature resistant material and field.
Disclosure of Invention
The invention aims to uniformly disperse porcelain forming fillers including metallic tin powder in an organic silicon rubber matrix, and cross-link the porcelain forming fillers with the metallic tin powder by using a peroxide vulcanizing agent to form a three-dimensional network structure so as to prepare the high-temperature-resistant and fireproof organic silicon rubber material. It has excellent flame retardant property at room temperature, and the ceramic body transformed at high temperature is more compact.
The principle of the invention is as follows: vinyl organic silicon rubber is used as a matrix, a porcelain forming filler containing metal Sn powder is added, and vulcanization molding is carried out through a peroxide vulcanizing agent. The metal Sn powder is a low-melting-point metal, the melting point of the metal Sn powder is only 231.89 ℃, and the high-temperature-resistant fireproof organic silicon rubber material has the following action principle: firstly, when high temperature is met, the metallic tin powder is firstly melted to form a liquid phase at the edge of other fillers, so that the organic silicon rubber is decomposed to generate SiO2Infiltrating and bonding with other ceramic forming fillers such as needle-shaped wollastonite and the like to form a compact ceramic body; secondly, Sn can react with residual oxygen in the high-temperature-resistant fireproof organic silicon rubber material in a high-temperature environment, so that the porosity of the ceramic body converted under the high-temperature condition is reduced, and the density of the ceramic body is improved; finally, SnO formation of Sn at high temperature2On one hand, the flame retardant ceramic has a flame retardant effect, and on the other hand, the flame retardant ceramic can be used as a solid-phase filler, so that the interior of a ceramic body is more compact and the strength is higher.
The content of the invention is as follows: the fireproof high-temperature-resistant organic silicon rubber material is characterized by being prepared from organic silicon rubber, metallic tin powder, wollastonite, white carbon black and a vulcanizing agent; the weight percentage of each raw material is as follows: 100 parts of organic silicon rubber, 10-50 parts of metallic tin powder, 150-190 parts of wollastonite, 40 parts of white carbon black, 5 parts of hydroxyl silicone oil and 1 part of vulcanizing agent, wherein the sum of the mass percentages of the raw materials is 100%. The organic silicon rubber is vinyl organic silicon rubber, the wollastonite is needle-shaped wollastonite, the white carbon black is precipitated white carbon black, and the vulcanizing agent is 2, 5-dimethyl-2, 5-di-tert-butyl peroxy hexane (DBPMH).
Another aspect of the invention is: a preparation method of a fireproof high-temperature-resistant organic silicon rubber material. The method is characterized by comprising the following steps:
(1) weighing organic silicon rubber, metallic tin powder, white carbon black, hydroxyl silicone oil and wollastonite according to a proportion, sequentially adding the organic silicon rubber, the metallic tin powder, the white carbon black, the hydroxyl silicone oil and the wollastonite into an internal mixer, carrying out internal mixing for 15 min at 105 ℃, taking out the internal mixed rubber, uniformly mixing, adding the internal mixed rubber into the internal mixer, carrying out internal mixing for 15 min, and carrying out internal mixing for 30 min so as to uniformly mix the filler and the colloid;
(2) and (2) placing the banburying rubber prepared in the step (1) on an open mill, adding a certain amount of vulcanizing agent, and uniformly mixing to obtain the fireproof high-temperature-resistant organic silicon rubber material.
The invention has the advantages that: by adding the porcelain forming filler including the metallic tin powder and the vulcanizing agent into the organic silicon rubber, the prepared organic silicon rubber material has good flame retardant property, and meanwhile, a ceramic body formed under a high-temperature condition is more compact, and the preparation process is simple, has low equipment requirement, and can be widely applied to fireproof and high-temperature resistant materials and fields.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The present invention is further illustrated by the following specific examples, which are provided only for the purpose of facilitating understanding of the present invention, and are not to be construed as further limiting the scope of the present invention.
To illustrate the effect of the embodiment, the fireproof and high temperature resistant silicone rubber material prepared in the embodiment is hot-pressed and molded at 175 ℃ and 10MPa for vulcanization for 10 min, and the vulcanized rubber is put into a 180 ℃ oven for secondary vulcanization for 2 h. The flame retardant property of the rubber is tested by the vertical burning test of the film according to the standard ANSI/UL94-2009, the sample size is 200 mm multiplied by 50 mm multiplied by 0.2 mm, and the rubber is longitudinally wound on a rod and vertically held; the density of the ceramic body at elevated temperature was measured according to the GB/T25995-2010 precision ceramic Density test method, with sample dimensions of 5 mm x 10 mm.
Detailed description of the preferred embodiment 1
(1) Putting 100 parts of vinyl silicone rubber into an internal mixer, then sequentially adding 40 parts of precipitated white carbon black, 5 parts of hydroxyl silicone oil, 50 parts of Sn and 150 parts of needle-like wollastonite, internally mixing for 15 min at 105 ℃, taking out, then internally mixing for 15 min, and internally mixing for 30 min to uniformly mix the filler and the colloid to obtain a rubber compound;
(2) and (3) placing the prepared banburying rubber on an open mill, adding 1 part of vulcanizing agent DBPMH, and open milling at room temperature for 10 min to obtain the fireproof high-temperature-resistant organic silicon rubber material. Specific properties are shown in table 1.
Specific example 2
(1) Putting 100 parts of vinyl silicone rubber into an internal mixer, then sequentially adding 40 parts of precipitated white carbon black, 5 parts of hydroxyl silicone oil, 40 parts of Sn and 160 parts of needle-like wollastonite, internally mixing for 15 min at 105 ℃, taking out, then internally mixing for 15 min, and internally mixing for 30 min to uniformly mix the filler and the colloid to obtain a rubber compound;
(2) and (3) placing the prepared banburying rubber on an open mill, adding 1 part of vulcanizing agent DBPMH, and open milling at room temperature for 10 min to obtain the fireproof high-temperature-resistant organic silicon rubber material. Specific properties are shown in table 1.
Specific example 3
(1) Putting 100 parts of vinyl silicone rubber into an internal mixer, then sequentially adding 40 parts of precipitated white carbon black, 5 parts of hydroxyl silicone oil, 30 parts of Sn and 170 parts of needle-like wollastonite, internally mixing for 15 min at 105 ℃, taking out, then internally mixing for 15 min, and internally mixing for 30 min to uniformly mix the filler and the colloid to obtain a rubber compound;
(2) and (3) placing the prepared rubber compound on an open mill, adding 1 part of vulcanizing agent DBPMH, and open milling at room temperature for 10 min to obtain the fireproof high-temperature-resistant organic silicon rubber material. Specific properties are shown in table 1.
Specific example 4
(1) Putting 100 parts of vinyl silicone rubber into an internal mixer, then sequentially adding 40 parts of precipitated white carbon black, 5 parts of hydroxyl silicone oil, 20 parts of Sn and 180 parts of needle-like wollastonite, internally mixing for 15 min at 105 ℃, taking out, then internally mixing for 15 min, and internally mixing for 30 min to uniformly mix the filler and the colloid to obtain a rubber compound;
(2) and (3) placing the prepared banburying rubber on an open mill, adding 1 part of vulcanizing agent DBPMH, and open milling at room temperature for 10 min to obtain the fireproof high-temperature-resistant organic silicon rubber material. Specific properties are shown in table 1.
Specific example 5
(1) Putting 100 parts of vinyl silicone rubber into an internal mixer, then sequentially adding 40 parts of precipitated white carbon black, 5 parts of hydroxyl silicone oil, 10 parts of Sn and 190 parts of needle-like wollastonite, internally mixing for 15 min at 105 ℃, taking out, then internally mixing for 15 min, and internally mixing for 30 min to uniformly mix the filler and the colloid to obtain a rubber compound;
(2) and (3) placing the prepared banburying rubber on an open mill, adding 1 part of vulcanizing agent DBPMH, and open milling at room temperature for 10 min to obtain the fireproof high-temperature-resistant organic silicon rubber material. Specific properties are shown in table 1.
In order to illustrate the advantages of the present invention, the present invention will be illustrated herein by way of comparative examples.
Comparative example 1
(1) Putting 100 parts of vinyl silicone rubber into an internal mixer, then sequentially adding 40 parts of precipitated white carbon black, 5 parts of hydroxyl silicone oil and 190 parts of needle-like wollastonite, carrying out internal mixing for 15 min at 105 ℃, taking out, carrying out internal mixing for 15 min, and carrying out internal mixing for 30 min so as to uniformly mix the filler and the colloid to obtain a rubber compound;
(2) and (3) placing the prepared banburying rubber on an open mill, adding 1 part of vulcanizing agent DBPMH, and open milling at room temperature for 10 min to obtain the fireproof high-temperature-resistant organic silicon rubber material. Specific properties are shown in table 1.
Comparative example 2
(1) Putting 100 parts of vinyl silicone rubber into an internal mixer, then sequentially adding 40 parts of precipitated white carbon black, 5 parts of hydroxyl silicone oil and 170 parts of needle-like wollastonite, carrying out internal mixing for 15 min at 105 ℃, taking out, carrying out internal mixing for 15 min, and carrying out internal mixing for 30 min so as to uniformly mix the filler and the colloid to obtain a rubber compound;
(2) and (3) placing the prepared banburying rubber on an open mill, adding 1 part of vulcanizing agent DBPMH, and open milling at room temperature for 10 min to obtain the fireproof high-temperature-resistant organic silicon rubber material. Specific properties are shown in table 1.
Comparative example 3
(1) Putting 100 parts of vinyl silicone rubber into an internal mixer, then sequentially adding 40 parts of precipitated white carbon black, 5 parts of hydroxy silicone oil and 150 parts of needle-like wollastonite, carrying out internal mixing for 15 min at 105 ℃, taking out, carrying out internal mixing for 15 min, and carrying out internal mixing for 30 min so as to uniformly mix the filler and the colloid to obtain a rubber compound;
(2) and (3) placing the prepared banburying rubber on an open mill, adding 1 part of vulcanizing agent DBPMH, and open milling at room temperature for 10 min to obtain the fireproof high-temperature-resistant organic silicon rubber material. Specific properties are shown in table 1.
Comparative example 4
(1) Putting 100 parts of vinyl silicone rubber into an internal mixer, then sequentially adding 40 parts of precipitated white carbon black and 5 parts of hydroxyl silicone oil, mixing for 15 min at 105 ℃, taking out, then carrying out internal mixing for 15 min, and carrying out internal mixing for 30 min to uniformly mix the filler and the colloid to obtain a dense rubber;
(2) and (3) placing the prepared banburying rubber on an open mill, adding 1 part of vulcanizing agent DBPMH, and open milling at room temperature for 10 min to obtain the fireproof high-temperature-resistant organic silicon rubber material. Specific properties are shown in table 1.
TABLE 1 comparison of properties of rubber materials of specific examples and comparative examples
Specific examples 1-9 and comparative example 1 reflect the influence of the metal tin powder, wollastonite and other porcelain forming fillers on the fireproof and high-temperature resistant organic silicon rubber, wherein the influences include the rubber flame retardant property and the ceramic body density after high-temperature porcelain forming at 1000 ℃. As can be seen from the table of the property parameters, when the acicular wollastonite and Sn are not added, the materials are directly decomposed into SiO under the condition of high temperature2Powder, can not form a ceramic body, can not resist high temperature, and has no flame retardant property; when only wollastonite is added, a ceramic body can be formed at high temperature, and the density is increased along with the increase of the ceramic forming filler; when Sn and the acicular wollastonite are added simultaneously according to the proportion, the flame retardant property of the rubber can be improved to reach the VTM-0 level, a compact ceramic body can be formed, and the density of the ceramic body is increased.
According to the invention, the fireproof high-temperature-resistant rubber material is prepared by adding the porcelain forming filler containing the metallic tin powder. The novel method is provided for preparing the fireproof and high-temperature-resistant material, and the prepared organic silicon rubber material not only has good flame retardant property, but also has a more compact ceramic body formed under the high-temperature condition. The fireproof high-temperature-resistant rubber material prepared by the invention also has the advantages of low production cost, environmental protection, simple preparation process, low equipment requirement and the like.
The upper and lower limits and interval values of the raw materials and the upper and lower limits and interval values of the process parameters can all realize the invention, and examples are not listed here.
Claims (3)
1. The fireproof high-temperature-resistant organic silicon rubber material is characterized by being prepared from organic silicon rubber, metallic tin powder, wollastonite, white carbon black, hydroxyl silicone oil and a vulcanizing agent; the raw material ratio is as follows: 100 parts of organic silicon rubber, 10-50 parts of metallic tin powder, 150-190 parts of wollastonite, 40 parts of white carbon black, 5 parts of hydroxyl silicone oil and 1 part of vulcanizing agent.
2. The material of claim 1, wherein the silicone rubber is vinyl silicone rubber, the wollastonite is needle-like wollastonite, the silica is precipitated silica, and the vulcanizing agent is 2, 5-dimethyl-2, 5-di-tert-butyl peroxy hexane (DBPMH).
3. The preparation method of the fireproof and high-temperature-resistant silicone rubber material according to claim 1, characterized by comprising the following steps: (1) weighing organic silicon rubber, metallic tin powder, white carbon black, hydroxyl silicone oil and wollastonite according to a proportion, sequentially adding the organic silicon rubber, the metallic tin powder, the white carbon black, the hydroxyl silicone oil and the wollastonite into an internal mixer, internally mixing for 15 min at 105 ℃, taking out, and internally mixing for 15 min, wherein the internal mixing is carried out for 30 min, so that the filler and the colloid are uniformly mixed; (2) and (2) placing the banburying rubber prepared in the step (1) on an open mill, adding a certain amount of vulcanizing agent, and uniformly mixing to obtain the fireproof high-temperature-resistant organic silicon rubber material.
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