CN111763362A - Fireproof rubber foamed sheet and preparation method thereof - Google Patents
Fireproof rubber foamed sheet and preparation method thereof Download PDFInfo
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
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- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
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- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
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Abstract
A fireproof rubber foamed sheet and its preparation method, regard nitrile rubber and polyvinyl chloride as the main raw materials, butadiene rubber is an auxiliary material, has added foaming agent, epoxidized soybean oil, carbon black, polyglycol, stearic acid, paraffin and stearate as the auxiliary adjuvant, and regard talc powder, aluminium hydroxide, chlorinated paraffin as the bulking agent, and cooperate with preparation technology of the invention, make fireproof rubber foamed sheet, not merely have good thermal insulation performance and compression rebound resilience performance, and nonflammable, the fire-proof effect is good, can apply to fields such as the building extensively.
Description
Technical Field
The invention relates to the technical field of rubber and plastic heat-insulating materials, in particular to a fireproof rubber foaming plate and a preparation method thereof.
Background
At present, the board is a common material in our lives, is applied to many aspects such as buildings, furniture, decoration and the like, is closely related to people's lives, but the board also brings potential safety hazards to our lives, and because the main material of the board is wood, the board cannot prevent fire, and the potential safety hazards exist in fire fighting.
Disclosure of Invention
The technical problem to be solved by the invention is how to improve the fireproof performance of the board, so that the fireproof rubber foamed board and the preparation method thereof are provided.
The technical scheme for solving the technical problems is as follows: the fireproof rubber foamed sheet comprises the following raw material components in parts by weight:
in one embodiment, the feed also comprises the following raw material components in parts by weight:
0.1-1.0 part of antioxidant
0.1-1.0 part of antioxidant.
In one embodiment, the nitrile rubber is nitrile rubber 2880.
In one embodiment, the polyvinyl chloride is polyvinyl chloride S700.
In one embodiment, the stearate comprises: one of calcium stearate, zinc stearate and magnesium stearate.
In one embodiment, the weight part ratio of the talcum powder is 40.0-50.0.
In one embodiment, the weight ratio of the carbon black is 14.0-18.0.
In one embodiment, the weight part ratio of the paraffin is 2.0-3.5.
A preparation method of a fireproof rubber foaming plate comprises the following steps:
one banburying step one: mixing butadiene-acrylonitrile rubber and butadiene rubber, and banburying for 30s to obtain an intermediate product A;
and a second primary banburying step: mixing polyvinyl chloride, talcum powder, epoxidized soybean oil, carbon black, polyethylene glycol, stearic acid, paraffin, stearate and the intermediate product A, and banburying to 130-135 ℃ to obtain an intermediate product B;
a third step of primary banburying: mixing aluminum hydroxide and chlorinated paraffin with the intermediate product B, and banburying to 145-155 ℃ to obtain an intermediate product C;
and a fourth step of primary banburying: mixing a foaming agent with the intermediate product C, and pressing for 60s through a lower top bolt to obtain an intermediate product D;
a primary open mill step: milling the intermediate product D for 5min, pressing into tablets, and cooling for 20min to obtain a primary sheet;
and (3) secondary banburying: mixing an anti-aging agent and an antioxidant with the primary sheet, and banburying for 60s to obtain an intermediate product E;
and (3) secondary open milling: the intermediate product E is milled for 5min, pressed into tablets and cooled for 10min to obtain a secondary sheet;
an extrusion step: forming the secondary sheet through a die to form a plate;
and (3) a vulcanization foaming step: and vulcanizing and foaming the plate to obtain the fireproof rubber foamed plate.
The invention has the beneficial effects that: the fireproof rubber foamed sheet provided by the invention is prepared by taking nitrile rubber and polyvinyl chloride as main raw materials, taking butadiene rubber as an auxiliary material, adding a foaming agent, epoxidized soybean oil, carbon black, polyethylene glycol, stearic acid, paraffin and stearate as auxiliary additives, and taking talcum powder, aluminum hydroxide and chlorinated paraffin as fillers, has good heat insulation performance and compression resilience performance, is non-flammable and good in fireproof effect, and can be widely applied to the fields of buildings and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic flow chart of a method for preparing a fireproof rubber foamed sheet according to an embodiment of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In one embodiment, the invention provides a fireproof rubber foamed sheet, which comprises the following raw material components in parts by weight:
in this embodiment, the main raw materials for forming the fireproof rubber foamed sheet are butadiene acrylonitrile rubber and polyvinyl chloride, wherein the butadiene acrylonitrile rubber is butadiene acrylonitrile rubber 2880 in type, the polyvinyl chloride is polyvinyl chloride S700 in type, the thermoplastic resin is polymerized under the action of an initiator, the thermoplastic resin has flame retardancy, acid and alkali resistance, antimicrobial property and wear resistance, the butadiene acrylonitrile rubber is an auxiliary material for improving the performance of the butadiene acrylonitrile rubber, and the thermoplastic resin is compounded with various auxiliary agents to form the fireproof rubber foamed sheet, wherein stearic acid can be used as a lubricant, an emulsifier and a solubilizer, so that the components can be uniformly mixed, the properties of the mixed components in unit weight are the same, and the stearate can be used as a plasticizer, a heat stabilizer and a lubricant, which helps to prevent the occurrence of coking in the processing process of polyvinyl chloride, and can prevent the discoloration of products placed in sulfides, the stearate comprises: the calcium stearate can be one of sodium stearate, lead stearate, aluminum stearate, cadmium stearate, ferric stearate and potassium stearate, is used for a cold-resistant plasticizer, a release agent, a stabilizer, a surfactant, a rubber vulcanization accelerator, a waterproof agent and a polishing agent of plastics, can be used as a nontoxic heat stabilizer of the polyvinyl chloride, has excellent lubricity, has a heat stabilizing effect inferior to that of barium stearate, lead stearate, tin stearate and cadmium stearate, and is cheap and easy to obtain, low in toxicity and good in processability. The epoxidized soybean oil is used as a nontoxic plasticizer and stabilizer for the polyvinyl chloride, has excellent thermal stability and light stability, is excellent in water resistance and oil resistance, can endow the board with good mechanical strength, weather resistance and electrical property, and is nontoxic.
In this embodiment, the carbon black is N550 carbon black, which can give high stiffness to nitrile rubber, smooth surface when extruded, small expansion of the mouth, and good reinforcement, elasticity and resilience, and the paraffin is semi-refined paraffin, which has good moisture resistance and insulation properties, good plasticity, good water solubility, and good compatibility with many organic components; the polyethylene glycol has excellent lubricity and can be used as an adhesive and an antistatic agent; the chlorinated paraffin has low volatility, flame retardance and good electrical insulation, is used as a flame retardant and a polyvinyl chloride auxiliary plasticizer, can enable a product to generate a foaming effect with compact and uniform pore diameter, so that the physical properties of the product such as elasticity and the like are increased, and the foaming agent can be an AC foaming agent which has stable performance, is nonflammable, pollution-free, nontoxic and tasteless, does not corrode a mould, does not dye the product, can adjust decomposition temperature, does not influence curing and forming speed, is uniform in continuous foaming and has an ideal pore structure; the chlorinated paraffin is used as an auxiliary plasticizer and a flame retardant, is matched with the talcum powder and the aluminum hydroxide to be used as an inorganic flame retardant filler and a strengthening and modifying filler, and is used for increasing the shape stability of products prepared from the butadiene-acrylonitrile rubber and the polyvinyl chloride, increasing the tensile strength, the shear strength, the flexural strength and the pressure strength of the products, and improving the processing performance and the mechanical property of the products; the anti-aging agent is used for delaying aging of high molecular compound, in one embodiment of the invention, the anti-aging agent is the anti-aging agent 4020, and the anti-oxidant is cytidine triphosphate, so that the early vulcanization phenomenon of rubber sizing materials in the processing process is prevented, the pre-vulcanization degree of the sizing materials is delayed, and the problem that finished products are easy to crack due to foaming is solved.
The fireproof rubber foamed plate further comprises an accelerator and a vulcanizing agent, wherein the vulcanizing agent is sulfur and is used for playing a bridging role between linear molecules so as to enable the linear molecules to be bonded and crosslinked into a three-dimensional network structure, the accelerator is a vulcanization accelerator for accelerating vulcanization and is matched with the vulcanizing agent for use so as to accelerate crosslinking between rubber and plastic, namely, crosslinking between the nitrile rubber and the polyvinyl chloride is accelerated, and the stearic acid can also be used as a vulcanization activator and a foaming agent, so that the activity of the accelerator can be improved, and the accelerator further fully plays the maximum accelerating role.
In order to further improve the thermal stability of the fireproof rubber foamed sheet, in one embodiment, the fireproof rubber foamed sheet further comprises 5.0-10.0 parts of epoxy resin, and the epoxy resin and the calcium stearate in the stearate are combined with zinc soap to have a synergistic effect, so that the thermal stability can be improved, and the weight part ratio of the zinc soap is 1.0-2.0. Furthermore, the epoxy resin can also be modified epoxy resin, the modified epoxy resin takes bisphenol A type epoxy resin as a main material, the board is endowed with excellent mechanical property and corrosion resistance, meanwhile, unsaturated polyester resin and polyphenylene sulfide are added to modify the epoxy resin, the cured epoxy resin has the characteristics of the unsaturated polyester resin, the polyphenylene sulfide and the epoxy resin, the board has higher bonding degree, meanwhile, the contraction of the unsaturated polyurethane resin in the curing process just offsets the expansion of the epoxy resin, the defect of simple volume expansion of the epoxy resin is overcome, in addition, the sulfydryl in the polyphenylene sulfide can generate chain extension reaction with the bisphenol A type epoxy resin, rigid polyphenylene sulfide is introduced into a flexible epoxy resin molecular chain, the flexibility of the epoxy resin is maintained, the board is endowed with certain strength, and after the modified epoxy resin is matched with the unsaturated polyester resin, the optimized synergy is realized, the heat resistance, the corrosion resistance and the mechanical property of the physical and chemical plate are obviously improved, the weight part ratio among the bisphenol A type epoxy resin, the unsaturated polyester resin and the polyphenylene sulfide can be adjusted according to the required performance of the plate, and the ratio is not limited in the specification, for example, the weight part ratio among the bisphenol A type epoxy resin, the unsaturated polyester resin and the polyphenylene sulfide can be 6:2: 2.
Furthermore, the carboxylated carbon nanotubes and the hollow glass beads are matched with the modified epoxy resin, so that the plate has good flame retardance and smoke suppression, and the fireproof performance of the fireproof rubber foamed plate is obviously improved; the weight part ratio of the carboxylated carbon nanotubes to the hollow glass beads is 0.5-1.0, the carboxylated carbon nanotubes and the hollow glass beads are added into a system of modified epoxy resin, the materials are uniformly dispersed in the system to form hard points, the optimization of a micro-phase structure in the system is realized, the double effects of abrasion resistance and abrasion caused by body deformation are achieved, the cross-linked net structure of the system is enhanced in the plate, the stress is greatly dispersed, the microcracks in the system are reduced, the toughness of the plate is improved, and the bending strength, the fracture bending deformation, the heat resistance and the aging resistance of the plate are improved.
In order to further improve the heat preservation capability of the fireproof rubber foamed plate, in one embodiment, the carbon black is activated carbon black, the activated carbon black is used for adsorbing any one or any combination of several of the paraffin, the polyethylene glycol, the polyethylene wax or the polypropylene wax, and when the temperature changes, the paraffin, the polyethylene glycol, the polyethylene wax or the polypropylene wax can absorb or release a large amount of heat through the transformation of physical forms, so that the storage and the utilization of the heat are realized, and the contradiction that the supply and demand of the heat are not matched in time and space can be effectively solved. For example, when the external temperature is too high and the temperature of a certain local part of the plate is too high, the paraffin wax, the polyethylene glycol, the polyethylene wax or the polypropylene wax is converted from a solid state to a liquid state, and heat of a certain local part of the plate is absorbed and stored, so that the temperature of the local part of the plate is reduced; meanwhile, when the paraffin, the polyethylene glycol, the polyethylene wax or the polypropylene wax is slowly converted into a solid state from a liquid state, the temperature stability of a space with a certain volume can be maintained by slowly releasing heat, and the heat-insulating capacity of the fireproof rubber foaming board is improved. In addition, the active carbon black is used for adsorbing any one of the paraffin, the polyethylene glycol, the polyethylene wax or the polypropylene wax, so that the heat-insulating capacity of the fireproof rubber foamed plate can be improved, the fireproof capacity of the fireproof rubber foamed plate can also be improved, the surface temperature of the plate is reduced by absorbing local heat on the surface of the plate, and the surface temperature cannot reach the ignition point of the plate.
In one embodiment, the present invention provides a method for preparing the fireproof rubber foamed sheet, as shown in fig. 1, including the following steps:
and step 110, mixing the butadiene-acrylonitrile rubber and the butadiene rubber, and banburying for 30s to obtain an intermediate product A. This step is also referred to as a first banburying step.
Specifically, in this step, 30.0 to 40.0 parts by weight of nitrile rubber and 2.5 to 4.0 parts by weight of butadiene rubber are mixed and banburied for 30 seconds by an internal mixer to obtain an intermediate product a.
And step 120, mixing polyvinyl chloride, talcum powder, epoxidized soybean oil, carbon black, polyethylene glycol, stearic acid, paraffin, stearate and the intermediate product A, and banburying to 130-135 ℃ to obtain an intermediate product B. This step is also referred to as the second primary banburying step.
Specifically, in the step, 10.0-20.0 parts by weight of polyvinyl chloride, 35.0-55.0 parts by weight of talcum powder, 5.0-10.0 parts by weight of epoxidized soybean oil, 13.0-20.0 parts by weight of carbon black, 2.0-8.0 parts by weight of polyethylene glycol, 10.0-20.0 parts by weight of stearic acid, 1.0-5.0 parts by weight of paraffin and 10.0-20.0 parts by weight of stearate are added into an internal mixer to be mixed with the intermediate product A, and the mixture is internally mixed to 135 ℃ to obtain an intermediate product B. The components can be dispersed better by adjusting the time of the first plastication, so that the compatibility problem during the mixing of the components is solved, and the polyvinyl chloride mentioned in the step can be polyvinyl chloride S700.
In a preferred embodiment, in the second primary banburying step, an epoxy resin is further added to be mixed with the intermediate product a, the epoxy resin and the calcium stearate in the stearate are combined with a zinc soap to have a synergistic effect, so that the thermal stability can be improved, and the fire resistance of the board can be further improved, or a modified epoxy resin is added, and the modified epoxy resin comprises: the unsaturated polyester resin, the polyphenylene sulfide and the epoxy resin realize the optimal cooperation, and the heat resistance, the corrosion resistance and the mechanical property of the physical and chemical plate are obviously improved.
Specifically, in this step, aluminum hydroxide and chloroparaffin are mixed with the intermediate product B, that is, 25.0 to 35.0 parts by weight of aluminum hydroxide and 25.0 to 35.0 parts by weight of chloroparaffin are added into an internal mixer to be mixed with the product B, and the mixture is internally mixed to 150 ℃ to obtain an intermediate product C.
And 140, mixing a foaming agent with the intermediate product C, and pressing for 60s through a lower plug to obtain an intermediate product D. This step is also referred to as the first banburying step four.
Specifically, in this step, 5.0 to 10.0 parts by weight of a foaming agent is added to an internal mixer to be mixed with the intermediate product C, and the mixture is pressed by a lower ram for 60 seconds to obtain an intermediate product D.
And 150, open milling the intermediate product D for 5min, pressing into tablets, and cooling for 20min to obtain a primary sheet. This step is also referred to as the primary open mill step.
Specifically, the roll mixing in this step is carried out by an open mill, for example, the intermediate product D obtained after internal mixing is transferred to a roll mixer to roll mix it. Wherein the cooling can be carried out by adopting an air cooling machine group.
And 160, mixing the anti-aging agent and the antioxidant with the primary sheet, and banburying for 60s to obtain an intermediate product E. This step is also referred to as a secondary banburying step.
Specifically, the primary sheet obtained above was transferred to an internal mixing system, and 0.1 to 1.0 part by weight of an antioxidant were added and mixed with the primary sheet, and internal mixing was performed for 60 seconds to obtain an intermediate E. The antioxidant is antioxidant 4020, and the antioxidant is cytidine triphosphate.
In the step, the fireproof rubber foamed sheet comprises the following raw material components in parts by weight: 30.0-40.0 parts of nitrile rubber, 2.5-4.0 parts of butadiene rubber, 35.0-55.0 parts of talcum powder, 25.0-35.0 parts of aluminum hydroxide, 10.0-20.0 parts of polyvinyl chloride, 5.0-10.0 parts of foaming agent, 25.0-35.0 parts of chlorinated paraffin, 5.0-10.0 parts of epoxidized soybean oil, 13.0-20.0 parts of carbon black, 2.0-8.0 parts of polyethylene glycol, 10.0-20.0 parts of stearic acid, 1.0-5.0 parts of paraffin, 10.0-20.0 parts of stearate, 0.1-1.0 part of anti-aging agent and 0.1-1.0 part of antioxidant, wherein the type of the anti-aging agent is anti-aging agent 4020, and the antioxidant is cytidine triphosphate, is used for preventing the rubber sizing material from generating early vulcanization phenomenon in the processing process, is used for delaying the pre-vulcanization degree of the pre-sizing material and solving the problem of foaming.
And 170, open milling the intermediate product E for 5min, pressing into tablets, and cooling for 10min to obtain secondary sheets. This step is also referred to as the secondary open mill step.
Specifically, the roll mixing in this step is carried out by an open mill, for example, the intermediate product E obtained after internal mixing is transferred to a roll mixer to roll mix it. Wherein the cooling can be carried out by adopting an air cooling machine group.
And step 180, forming the secondary sheet through a die to form a plate. This step is also referred to as the extrusion step.
The sheet material in the step is formed through a die, specifically, the forming is completed through an extruder, and in the extruder, a secondary sheet material is formed through a specific die to form the sheet material.
And 190, vulcanizing and foaming the plate to obtain the fireproof rubber foamed plate. This step is also referred to as the vulcanization foaming step.
Specifically, the vulcanization foaming in the step is carried out in an oven, and the plate formed by the extruder is vulcanized and foamed in the oven to form the fireproof rubber foamed plate.
The invention is further described below with reference to specific examples.
Example 1
In an internal mixing system, 35.0 parts by weight of nitrile rubber and 2.8 parts by weight of butadiene rubber were mixed and internal mixed for 30 seconds to obtain intermediate product a.
Adding 16.0 parts by weight of polyvinyl chloride, 40.0 parts by weight of talcum powder, 7.0 parts by weight of epoxidized soybean oil, 18.0 parts by weight of carbon black, 4.2 parts by weight of polyethylene glycol, 15.0 parts by weight of stearic acid, 3.5 parts by weight of paraffin and 15.0 parts by weight of stearate into an internal mixing system, mixing with the intermediate product A, and carrying out internal mixing to 135 ℃ to obtain an intermediate product B.
Adding 33.0 parts by weight of aluminum hydroxide and 27.0 parts by weight of chlorinated paraffin into an internal mixing system to mix with the product B, and internally mixing to 150 ℃ to obtain an intermediate product C.
7.0 parts by weight of a foaming agent was added to an internal mixer and mixed with the intermediate product C, followed by pressing with a lower ram for 60 seconds to obtain an intermediate product D.
And (3) in an open mill system, opening the intermediate product D for 5min, pressing into tablets, and cooling the tablets for 20min to obtain a primary sheet.
Example 2
In an internal mixing system, 33.2 parts by weight of nitrile rubber and 3.6 parts by weight of butadiene rubber were mixed and internal mixed for 30 seconds to obtain intermediate product a.
Adding 15.7 parts by weight of polyvinyl chloride, 50.0 parts by weight of talcum powder, 5.5 parts by weight of epoxidized soybean oil, 14.5 parts by weight of carbon black, 3.2 parts by weight of polyethylene glycol, 17.0 parts by weight of stearic acid, 2.3 parts by weight of paraffin and 13.0 parts by weight of stearate into an internal mixing system, mixing with the intermediate product A, and internally mixing to 135 ℃ to obtain an intermediate product B.
Adding 25.0 parts by weight of aluminum hydroxide and 32.0 parts by weight of chlorinated paraffin into an internal mixing system to mix with the product B, and internally mixing to 150 ℃ to obtain an intermediate product C.
8.6 parts by weight of a foaming agent was added to an internal mixer and mixed with the intermediate product C, followed by pressing with a lower ram for 60 seconds to obtain an intermediate product D.
And (3) in an open mill system, opening the intermediate product D for 5min, pressing into tablets, and cooling the tablets for 20min to obtain a primary sheet.
And transferring the primary sheet to an internal mixing system again, mixing 0.5 part by weight of anti-aging agent and 0.5 part by weight of antioxidant with the primary sheet, and carrying out internal mixing for 60 seconds to obtain an intermediate product E.
And (3) in an open mill system, opening the intermediate product E for 5min, pressing into tablets, and air-cooling for 10min to obtain secondary sheets.
And (3) forming the secondary sheet through a die by an extruder, and forming the secondary sheet through a specific die to form the plate.
And finally, vulcanizing and foaming the plate in an oven to obtain the fireproof rubber foamed plate.
Example 3
In an internal mixing system, 37.0 parts by weight of nitrile rubber and 3.3 parts by weight of butadiene rubber were mixed and subjected to internal mixing for 30 seconds to obtain an intermediate product a.
Adding 18.0 parts by weight of polyvinyl chloride, 45.0 parts by weight of talcum powder, 6.0 parts by weight of epoxidized soybean oil, 16.5 parts by weight of carbon black, 6.5 parts by weight of polyethylene glycol, 13.0 parts by weight of stearic acid, 3.0 parts by weight of paraffin and 18.0 parts by weight of stearate into an internal mixing system, mixing with the intermediate product A, and internally mixing to 135 ℃ to obtain an intermediate product B.
30.0 parts by weight of aluminum hydroxide and 30.0 parts by weight of chlorinated paraffin are added into an internal mixing system to be mixed with the product B, and the mixture is internally mixed to 150 ℃ to obtain an intermediate product C.
8.0 parts by weight of a foaming agent was added to an internal mixer and mixed with the intermediate product C, followed by pressing with a lower ram for 60 seconds to obtain an intermediate product D.
And (3) in an open mill system, opening the intermediate product D for 5min, pressing into tablets, and cooling the tablets for 20min to obtain a primary sheet.
And transferring the primary sheet to an internal mixing system again, mixing 0.5 part by weight of anti-aging agent and 0.5 part by weight of antioxidant with the primary sheet, and carrying out internal mixing for 60 seconds to obtain an intermediate product E.
And (3) in an open mill system, opening the intermediate product E for 5min, pressing into tablets, and air-cooling for 10min to obtain secondary sheets.
And (3) forming the secondary sheet through a die by an extruder, and forming the secondary sheet through a specific die to form the plate.
And finally, vulcanizing and foaming the plate in an oven to obtain the fireproof rubber foamed plate.
The following are the test data of the fireproof rubber foamed sheets prepared in examples 1 and 2:
tests prove that the fireproof rubber foamed sheet prepared in the embodiment has low heat conductivity coefficient, when the average temperature is 0 ℃, the heat conductivity coefficient is less than or equal to 0.036W/(m × k), and the surface heat release coefficient is high, so that under the same environmental condition, the fireproof rubber foamed sheet can achieve the same heat insulation effect only by being half as thick as other heat insulation materials, the space and the resources are saved, and the fireproof performance of the fireproof rubber foamed sheet is good.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above embodiments only express a few embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. The fireproof rubber foamed board is characterized by comprising the following raw material components in parts by weight:
2. the fireproof rubber foamed sheet material of claim 1, further comprising the following raw material components in parts by weight:
0.1-1.0 part of antioxidant
0.1-1.0 part of antioxidant.
3. A fire-resistant rubber foamed sheet according to claim 1, wherein said nitrile rubber is nitrile rubber 2880.
4. A fire-resistant rubber foam board according to claim 1, wherein said polyvinyl chloride is polyvinyl chloride S700.
5. A fire-resistant rubber foamed sheet as claimed in claim 1, wherein said stearate comprises: one of calcium stearate, zinc stearate and magnesium stearate.
6. A fire-proof rubber foamed sheet material as claimed in claim 1, wherein the weight portion ratio of the talcum powder is 40.0-50.0.
7. A fire-retardant rubber foamed sheet according to claim 1, wherein said carbon black is contained in an amount of 14.0 to 18.0 parts by weight.
8. A fire-proof rubber foamed sheet according to claim 1, wherein the paraffin is 2.0 to 3.5 parts by weight.
9. A preparation method of a fireproof rubber foaming plate is characterized by comprising the following steps: the method comprises the following steps:
one banburying step one: mixing butadiene-acrylonitrile rubber and butadiene rubber, and banburying for 30s to obtain an intermediate product A;
and a second primary banburying step: mixing polyvinyl chloride, talcum powder, epoxidized soybean oil, carbon black, polyethylene glycol, stearic acid, paraffin, stearate and the intermediate product A, and banburying to 130-135 ℃ to obtain an intermediate product B;
a third step of primary banburying: mixing aluminum hydroxide and chlorinated paraffin with the intermediate product B, and banburying to 145-155 ℃ to obtain an intermediate product C;
and a fourth step of primary banburying: mixing a foaming agent with the intermediate product C, and pressing for 60s through a lower top bolt to obtain an intermediate product D;
a primary open mill step: milling the intermediate product D for 5min, pressing into tablets, and cooling for 20min to obtain a primary sheet;
and (3) secondary banburying: mixing an anti-aging agent and an antioxidant with the primary sheet, and banburying for 60s to obtain an intermediate product E;
and (3) secondary open milling: the intermediate product E is milled for 5min, pressed into tablets and cooled for 10min to obtain a secondary sheet;
an extrusion step: forming the secondary sheet through a die to form a plate;
and (3) a vulcanization foaming step: and vulcanizing and foaming the plate to obtain the fireproof rubber foamed plate.
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