CN111303543A - Flame-retardant ethylene propylene diene monomer material and preparation method thereof - Google Patents
Flame-retardant ethylene propylene diene monomer material and preparation method thereof Download PDFInfo
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- CN111303543A CN111303543A CN202010140646.5A CN202010140646A CN111303543A CN 111303543 A CN111303543 A CN 111303543A CN 202010140646 A CN202010140646 A CN 202010140646A CN 111303543 A CN111303543 A CN 111303543A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
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- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses a flame-retardant ethylene propylene diene monomer material and a preparation method thereof, belonging to the technical field of rubber material preparation. According to the technical scheme, the magnesium hydroxide is adopted to crystallize and coat the expanded graphite, the temperature rise of the polymer is inhibited due to dehydration and heat absorption of the hydroxide, the temperature is favorably reduced, meanwhile, after the magnesium hydroxide starts to dehydrate and decompose at a lower temperature in an endothermic manner, the flame retardant property of the material is improved, and meanwhile, the magnesium hydroxide is added to improve the dispersion property of the flame retardant material, so that the mechanical property and the bonding strength of the rubber material prepared by adding the magnesium hydroxide are improved, and the rubber material has excellent flame retardance and mechanical property.
Description
Technical Field
The invention discloses a flame-retardant ethylene propylene diene monomer material and a preparation method thereof, belonging to the technical field of rubber material preparation.
Background
The combustion is a violent oxidation reaction of high molecular materials (combustible materials), and the reaction is more violent when a combustion system is provided with a combustion supporter. The large amount of heat generated by the combustion reaction causes the combustible substances to be rapidly decomposed and volatilized, and simultaneously generates a large amount of smoke and flame to cause phenomena such as explosion and the like, so that the phenomenon is called 'fire'. Many buildings and living goods in daily life of people are made of combustible high polymer materials, once a fire disaster occurs, great loss of lives and properties which cannot be recovered is caused, so that the high polymer materials are modified, the combustion process of the materials is slowed down, or the materials are non-combustible to a certain degree, and the direction of research and development of novel materials is formed. The modification of the combustible or combustible high polymer material into the material which is difficult to combust or incombustible in the room temperature standard atmospheric environment is also called as the flame retardant modification of the high polymer material.
Ethylene Propylene Diene Monomer (EPDM) is general rubber prepared by copolymerizing ethylene, propylene and a small amount of crosslinking monomer (third monomer), the main chain of the EPDM is a saturated bond, so the EPDM has good heat resistance and ageing resistance, the intermolecular force of the EPDM is small, raw rubber can be filled with a large amount of filler and oil, the EPDM has good low-temperature performance, and the EPDM has good weather-proof ageing resistance and is suitable for manufacturing waterproof coiled materials and electric wires and cables, because the EPDM is a hydrocarbon, the EPDM is extremely easy to burn, the limit oxygen index of pure EPDM is only about 17, and when the EPDM is used for manufacturing household appliance insulation products, automobile damping products and electric wires and cables, flame-retardant modification is needed to meet the requirement of safe use. The conventional flame retardant modification scheme generally needs to add a flame retardant into the flame retardant, and common flame retardants can be divided into hydroxides, metal oxides and inorganic salts, but are simply added as flame retardant fillers, so that the bonding property and the mechanical strength of the material are obviously lost, and therefore, the effective treatment modification of the flame retardant is necessary to ensure that the flame retardant has both the mechanical property and the flame retardant property.
Disclosure of Invention
The invention mainly solves the technical problem that a flame retardant is generally required to be added into the conventional ethylene propylene diene monomer flame-retardant modification scheme, the conventional flame retardant can be divided into hydroxide, metal oxide and inorganic salt, but the conventional flame retardant is simply added as a flame retardant filler, and the bonding property and the mechanical strength of the material are obviously lost, so that the material is required to be effectively treated and modified to have both the mechanical property and the flame retardant property. The flame-retardant ethylene propylene diene monomer rubber material and the preparation method thereof are provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the flame-retardant ethylene propylene diene monomer material is prepared from the following substances in parts by weight:
45-50 parts of ethylene propylene diene monomer;
1-2 parts of a silane coupling agent;
3-5 parts of stearic acid;
10-15 parts of composite flame retardant particles;
3-5 parts of metal oxide;
1-2 parts of paraffin oil;
3-5 parts of microcrystalline wax;
3-5 parts of a color mixing material;
the composite flame retardant particles comprise base layer particles and an outer coating layer, wherein the outer coating layer is a magnesium hydroxide layer. The base layer particles are refined expanded graphite particles.
The outer coating layer is an aluminum hydroxide layer prepared by composite crystallization coating of magnesium chloride solution, polyvinylpyrrolidone and ammonia water.
The color matching material is one or a mixture of two of carbon black and titanium dioxide.
The metal oxide is zinc oxide.
The preparation steps of the composite flame retardant particles are as follows:
(1) taking and drying expanded graphite to constant weight, collecting the dried expanded graphite, placing the dried expanded graphite in a ball milling tank, carrying out ball milling and sieving, and collecting refined expanded graphite particles;
(2) putting deionized water, a magnesium chloride solution, polyvinylpyrrolidone and ammonia water into a three-neck flask, and stirring for 2-3 hours at the temperature of 40-50 ℃ to obtain a coating solution;
(3) according to the mass ratio of 1: 15, adding the refined expanded graphite particles into the seed crystal liquid, stirring and mixing the mixture, placing the mixture into a three-neck flask, dropwise adding ammonia water and magnesium chloride solution into the three-neck flask respectively, stirring and mixing the mixture, keeping the temperature and reacting the mixture to obtain reaction mixed liquid, carrying out centrifugal separation on the reaction mixed liquid, collecting lower-layer precipitates, and carrying out vacuum drying to obtain the composite flame retardant particles.
The preparation method of the flame-retardant ethylene propylene diene monomer material comprises the following specific preparation steps:
(1) taking ethylene propylene diene monomer and drying to obtain dry rubber particles, adding a silane coupling agent into the dry rubber particles, mixing and stirring to obtain mixed rubber particles, placing the mixed rubber particles into an extruder, and carrying out heat preservation, melting and mixing to obtain a molten matrix rubber material;
(2) respectively weighing the molten rubber material, the stearic acid and the composite flame retardant particles according to parts by weight, stirring and mixing to obtain a mixed material 1, respectively weighing the metal oxide, the paraffin oil and the color mixing material according to parts by weight, stirring and mixing the microcrystalline wax to obtain a mixed material 2, simultaneously feeding the mixed material 1 and the mixed material 2, sequentially and uninterruptedly adding the mixed material 1 and the mixed material 2 into an extruder, and performing extrusion molding to obtain the flame-retardant ethylene propylene diene monomer rubber material.
The beneficial technical effects of the invention are as follows:
(1) the technical scheme of the invention adopts the expanded graphite as matrix particles, the expanded graphite has the advantages of no toxicity, good heat insulation, less smoke and the like, when the expanded graphite is added into a matrix material, the expanded graphite has many excellent performances, the expanded graphite can expand to fill the whole space and form an expandable carbon layer at the temperature of 230-280 ℃, the expansion volume of the expanded graphite can reach more than 100 times at the temperature of about 1000 ℃, the expansion volume reaches the maximum, and in the expansion process of the expanded graphite, a large amount of heat is absorbed, so that the worm-shaped carbon layer formed after the surface temperature of the matrix of the material is combusted is greatly reduced, and the flame retardant effect is exerted on slowing down the transfer of heat and combustible substances between a condensed phase and a gas phase and avoiding the further damage to the interior of the material;
(2) according to the technical scheme, the magnesium hydroxide is adopted to crystallize and coat the expanded graphite, the temperature rise of the polymer is inhibited due to dehydration and heat absorption of the hydroxide, the temperature is favorably reduced, meanwhile, after the magnesium hydroxide starts to dehydrate and decompose at a lower temperature in an endothermic manner, the flame retardant property of the material is improved, and meanwhile, the magnesium hydroxide is added to improve the dispersion property of the flame retardant material, so that the mechanical property and the bonding strength of the rubber material prepared by adding the magnesium hydroxide are improved, and the rubber material has excellent flame retardance and mechanical property.
Detailed Description
Taking expanded graphite, placing the expanded graphite at 100-110 ℃ for drying to constant weight, collecting the dried expanded graphite, placing the dried expanded graphite in a ball milling tank, carrying out ball milling at 250-300 r/min for 3-5, then carrying out ball milling, sieving with a 200-mesh sieve, collecting refined expanded graphite particles, placing 45-50 parts of deionized water, 3-5 parts of 1mol/L magnesium chloride solution, 10-15 parts of polyvinylpyrrolidone and 6-8 parts of 10% ammonia water by mass in a three-neck flask, and carrying out heat preservation and stirring at 40-50 ℃ for 2-3 hours to obtain a coating solution; according to the mass ratio of 1: adding the refined expanded graphite particles into a seed crystal liquid, stirring, mixing and placing into a three-neck flask, then respectively dropwise adding 0.5mol/L of ammonia water and 0.5mol/L of magnesium chloride solution into the three-neck flask, controlling the dropwise adding rate of the magnesium chloride solution to be 2mL/h and the dropwise adding rate of the ammonia water to be 1mL/h, stirring, mixing and placing at 40-50 ℃ for heat preservation reaction for 2-3 h to obtain a reaction mixed liquid, placing the reaction mixed liquid at 2000-3000 r/min for centrifugal separation, collecting lower-layer precipitates, and vacuum drying to obtain composite flame retardant particles; taking ethylene propylene diene monomer, drying at 45-50 ℃ for 6-8 hours to obtain dry rubber particles, adding a silane coupling agent into the dry rubber particles according to the mass ratio of 1:10, mixing and stirring to obtain mixed rubber particles, placing the mixed rubber particles into an extruder, controlling the temperature of the extruder head to be 100-110 ℃, keeping the temperature and melting for 25-30 min, then heating to 135-140 ℃ according to 5 ℃/min, keeping the temperature and stirring for 15-20 min, after stirring and mixing are completed, obtaining a molten matrix rubber material, respectively weighing 45-50 parts by weight of the molten rubber material, 3-5 parts by weight of stearic acid and 10-15 parts by weight of composite flame retardant particles, stirring and mixing to obtain a mixed material 1, respectively weighing 3-5 parts by weight of metal oxide, 1-2 parts by weight of paraffin oil, 3-5 parts by weight of a color mixing material and 3-5 parts by weight of microcrystalline wax to obtain a mixed material 2, respectively feeding the mixed material 1 and the mixed material 2 simultaneously, and (3) sequentially and uninterruptedly adding the mixture 1 and the mixture 2 into an extruder, controlling the rotating speed of a screw of the extruder to be 25r/min, and performing extrusion molding at the temperature of a discharge port of 145-150 ℃ to obtain the flame-retardant ethylene propylene diene monomer material.
Example 1
Taking expanded graphite, placing the expanded graphite at 100 ℃ for drying to constant weight, collecting the dried expanded graphite, placing the dried expanded graphite in a ball milling tank, carrying out ball milling at 250r/min for 3h, then carrying out ball milling and sieving with a 200-mesh sieve, collecting refined expanded graphite particles, placing 45 parts of deionized water, 3 parts of 1mol/L magnesium chloride solution, 10 parts of polyvinylpyrrolidone and 6 parts of 10% ammonia water by mass in a three-neck flask, and carrying out heat preservation and stirring at 40 ℃ for 2h to obtain a coating solution; according to the mass ratio of 1: 15, adding the refined expanded graphite particles into a seed crystal liquid, stirring, mixing and placing into a three-neck flask, then respectively dropwise adding 0.5mol/L ammonia water and 0.5mol/L magnesium chloride solution into the three-neck flask, controlling the dropwise adding rate of the magnesium chloride solution to be 2mL/h and the dropwise adding rate of the ammonia water to be 1mL/h, stirring, mixing and placing at 40 ℃ for heat preservation reaction for 2h to obtain a reaction mixed liquid, placing the reaction mixed liquid at 2000r/min for centrifugal separation, collecting lower-layer precipitates, and performing vacuum drying to obtain composite flame retardant particles; taking ethylene propylene diene monomer, drying at 45 ℃ for 6 hours to obtain dry rubber particles, adding a silane coupling agent into the dry rubber particles according to the mass ratio of 1:10, mixing and stirring to obtain mixed rubber particles, placing the mixed rubber particles into an extruder, controlling the temperature of the head of the extruder to be 100 ℃, keeping the temperature for melting for 25min, then heating to 135 ℃ at the speed of 5 ℃/min, keeping the temperature for stirring for 15min, after stirring and mixing are completed, obtaining molten matrix rubber materials, respectively weighing 45 parts of molten rubber materials, 3 parts of stearic acid and 10 parts of composite flame retardant particles according to the parts by weight, stirring and mixing to obtain a mixed material 1, respectively weighing 3 parts of metal oxide, 1 part of paraffin oil, 3 parts of color mixing materials and 3 parts of microcrystalline wax, stirring and mixing to obtain a mixed material 2, respectively feeding the mixed material 1 and the mixed material 2 simultaneously, sequentially and uninterruptedly feeding the mixed material 1 and the mixed material 2 into the extruder, controlling the rotating speed of a screw of the extruder to be 25r/min, and extruding and molding at the temperature of a discharge port of 145 ℃ to obtain the flame-retardant ethylene propylene diene monomer material.
Example 2
Taking expanded graphite, placing the expanded graphite at 105 ℃ for drying to constant weight, collecting the dried expanded graphite, placing the dried expanded graphite in a ball milling tank, carrying out ball milling at 275r/min for 4 hours, carrying out ball milling, sieving with a 200-mesh sieve, collecting refined expanded graphite particles, placing 47 parts of deionized water, 4 parts of 1mol/L magnesium chloride solution, 12 parts of polyvinylpyrrolidone and 7 parts of 10% ammonia water by mass in a three-neck flask, and carrying out heat preservation and stirring at 45 ℃ for 2 hours to obtain a coating solution; according to the mass ratio of 1: 15, adding the refined expanded graphite particles into a seed crystal liquid, stirring, mixing and placing into a three-neck flask, then respectively dropwise adding 0.5mol/L of ammonia water and 0.5mol/L of magnesium chloride solution into the three-neck flask, controlling the dropwise adding rate of the magnesium chloride solution to be 2mL/h and the dropwise adding rate of the ammonia water to be 1mL/h, stirring, mixing and placing at 47 ℃ for heat preservation reaction for 2h to obtain a reaction mixed liquid, placing the reaction mixed liquid at 2000-3000 r/min for centrifugal separation, collecting lower-layer precipitates, and vacuum drying to obtain composite flame retardant particles; taking ethylene propylene diene monomer, drying at 47 ℃ for 7 hours to obtain dry rubber particles, adding a silane coupling agent into the dry rubber particles according to the mass ratio of 1:10, mixing and stirring to obtain mixed rubber particles, placing the mixed rubber particles into an extruder, controlling the temperature of the head of the extruder to be 105 ℃, keeping the temperature for melting for 27min, then heating to 137 ℃ at the temperature of 5 ℃/min, keeping the temperature for stirring for 17min, after stirring and mixing are completed, obtaining molten matrix rubber materials, respectively weighing 47 parts of molten rubber materials, 4 parts of stearic acid and 12 parts of composite flame retardant particles according to the parts by weight, stirring and mixing to obtain a mixed material 1, respectively weighing 4 parts of metal oxide, 1 part of paraffin oil, 4 parts of color mixing materials and 4 parts of microcrystalline wax, stirring and mixing to obtain a mixed material 2, respectively feeding the mixed material 1 and the mixed material 2 simultaneously, sequentially and uninterruptedly feeding the mixed material 1 and the mixed material 2 into the extruder, controlling the rotating speed of a screw of the extruder to be 25r/min, and extruding and molding at the temperature of 147 ℃ at a discharge port to obtain the flame-retardant ethylene propylene diene monomer rubber material.
Example 3
Taking expanded graphite, placing the expanded graphite at 110 ℃ for drying to constant weight, collecting the dried expanded graphite, placing the dried expanded graphite in a ball milling tank, carrying out ball milling at 300r/min for 5 hours, carrying out ball milling, sieving with a 200-mesh sieve, collecting refined expanded graphite particles, placing 50 parts of deionized water, 5 parts of 1mol/L magnesium chloride solution, 15 parts of polyvinylpyrrolidone and 8 parts of 10% ammonia water by mass in a three-neck flask, and carrying out heat preservation and stirring at 50 ℃ for 3 hours to obtain a coating solution; according to the mass ratio of 1: 15, adding the refined expanded graphite particles into a seed crystal liquid, stirring, mixing and placing into a three-neck flask, then respectively dropwise adding 0.5mol/L ammonia water and 0.5mol/L magnesium chloride solution into the three-neck flask, controlling the dropwise adding rate of the magnesium chloride solution to be 2mL/h and the dropwise adding rate of the ammonia water to be 1mL/h, stirring, mixing and placing at 50 ℃ for heat preservation reaction for 3 hours to obtain a reaction mixed liquid, placing the reaction mixed liquid at 3000r/min for centrifugal separation, collecting lower-layer precipitates, and performing vacuum drying to obtain composite flame retardant particles; taking ethylene propylene diene monomer, drying at 50 ℃ for 8 hours to obtain dry rubber particles, adding a silane coupling agent into the dry rubber particles according to the mass ratio of 1:10, mixing and stirring to obtain mixed rubber particles, placing the mixed rubber particles into an extruder, controlling the temperature of the head of the extruder to be 110 ℃, keeping the temperature and melting for 30min, then heating to 140 ℃ according to the temperature of 5 ℃/min, keeping the temperature and stirring for 20min, after stirring and mixing are completed, obtaining molten matrix rubber materials, respectively weighing 50 parts of molten rubber materials, 5 parts of stearic acid and 15 parts of composite flame retardant particles according to the parts by weight, stirring and mixing to obtain a mixed material 1, respectively weighing 5 parts of metal oxide, 2 parts of paraffin oil, 5 parts of color mixing materials and 5 parts of microcrystalline wax, stirring and mixing to obtain a mixed material 2, respectively feeding the mixed material 1 and the mixed material 2 simultaneously, sequentially and uninterruptedly feeding the mixed material 1 and the mixed material 2 into the extruder, controlling the rotating speed of a screw of the extruder to be 25r/min, and extruding and molding at the temperature of a discharge port of 150 ℃ to obtain the flame-retardant ethylene propylene diene monomer rubber material.
Example 4
Taking ethylene propylene diene monomer, drying at 50 ℃ for 8 hours to obtain dry rubber particles, adding a silane coupling agent into the dry rubber particles according to the mass ratio of 1:10, mixing and stirring to obtain mixed rubber particles, placing the mixed rubber particles into an extruder, controlling the temperature of the head of the extruder to be 110 ℃, keeping the temperature and melting for 30min, then heating to 140 ℃ according to the temperature of 5 ℃/min, keeping the temperature and stirring for 20min, after stirring and mixing are completed, obtaining molten matrix rubber materials, respectively weighing 50 parts of molten rubber materials, 5 parts of stearic acid and 15 parts of magnesium hydroxide according to the parts by weight, stirring and mixing to obtain a mixed material 1, respectively weighing 5 parts of metal oxide, 2 parts of paraffin oil, 5 parts of color mixing material and 5 parts of microcrystalline wax according to the parts by weight, stirring and mixing to obtain a mixed material 2, respectively feeding the mixed material 1 and the mixed material 2 simultaneously, sequentially adding the mixed material 1 and the mixed material 2 into the extruder, controlling the rotating speed of a screw of the extruder to be, and (3) extruding and molding at the temperature of a discharge port of 150 ℃ to obtain the flame-retardant ethylene propylene diene monomer material.
The performance tests were performed on example 1, example 2, example 3 and example 4, adjusting example 4 to ethylene propylene diene monomer rubber prepared with magnesium hydroxide as flame retardant material:
the tensile properties, tear strength and flame resistance of the rubber materials were tested according to GB/T528-1998, GB/T529-1999 and GB/T13488-1992, the results of which are shown in Table 1 below:
table 1 performance comparison table:
as can be seen from the comparison of the above table, the examples 1, 2, 3 and 4 show that the coated modified flame retardant rubber material prepared by the technical scheme of the present invention has a higher tensile strength, because the material coated with pure aluminum hydroxide has a larger specific surface area, and the dispersing performance of the flame retardant material is improved after the material is coated with magnesium hydroxide, so that the mechanical properties and the bonding strength of the rubber material prepared by adding are improved, and the rubber material has excellent flame retardancy and mechanical properties.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. The flame-retardant ethylene propylene diene monomer material is characterized by comprising the following substances in parts by weight:
45-50 parts of ethylene propylene diene monomer;
1-2 parts of a silane coupling agent;
3-5 parts of stearic acid;
10-15 parts of composite flame retardant particles;
3-5 parts of metal oxide;
1-2 parts of paraffin oil;
3-5 parts of microcrystalline wax;
3-5 parts of a color mixing material;
the composite flame retardant particles comprise base layer particles and an outer coating layer, wherein the outer coating layer is a magnesium hydroxide layer.
2. The flame-retardant ethylene propylene diene monomer material according to claim 1, wherein the base layer particles are refined expanded graphite particles.
3. The flame-retardant ethylene propylene diene monomer material according to claim 1, wherein the outer coating layer is an aluminum hydroxide layer prepared by composite crystallization coating of magnesium chloride solution, polyvinylpyrrolidone and ammonia water.
4. The flame-retardant ethylene propylene diene monomer material according to claim 1, wherein the tinter is one or a mixture of two of carbon black and titanium dioxide.
5. The flame-retardant ethylene propylene diene monomer material according to claim 1, wherein the metal oxide is zinc oxide.
6. The flame-retardant ethylene propylene diene monomer material according to claim 1, wherein the composite flame retardant particles are prepared by the following steps:
(1) taking and drying expanded graphite to constant weight, collecting the dried expanded graphite, placing the dried expanded graphite in a ball milling tank, carrying out ball milling and sieving, and collecting refined expanded graphite particles;
(2) putting deionized water, a magnesium chloride solution, polyvinylpyrrolidone and ammonia water into a three-neck flask, and stirring for 2-3 hours at the temperature of 40-50 ℃ to obtain a coating solution;
(3) according to the mass ratio of 1: 15, adding the refined expanded graphite particles into the seed crystal liquid, stirring and mixing the mixture, placing the mixture into a three-neck flask, dropwise adding ammonia water and magnesium chloride solution into the three-neck flask respectively, stirring and mixing the mixture, keeping the temperature and reacting the mixture to obtain reaction mixed liquid, carrying out centrifugal separation on the reaction mixed liquid, collecting lower-layer precipitates, and carrying out vacuum drying to obtain the composite flame retardant particles.
7. A preparation method of a flame-retardant ethylene propylene diene monomer material is characterized by comprising the following specific preparation steps:
(1) taking ethylene propylene diene monomer and drying to obtain dry rubber particles, adding a silane coupling agent into the dry rubber particles, mixing and stirring to obtain mixed rubber particles, placing the mixed rubber particles into an extruder, and carrying out heat preservation, melting and mixing to obtain a molten matrix rubber material;
(2) respectively weighing the molten rubber material, the stearic acid and the composite flame retardant particles according to parts by weight, stirring and mixing to obtain a mixed material 1, respectively weighing the metal oxide, the paraffin oil and the color mixing material according to parts by weight, stirring and mixing the microcrystalline wax to obtain a mixed material 2, simultaneously feeding the mixed material 1 and the mixed material 2, sequentially and uninterruptedly adding the mixed material 1 and the mixed material 2 into an extruder, and performing extrusion molding to obtain the flame-retardant ethylene propylene diene monomer rubber material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114921061A (en) * | 2022-06-23 | 2022-08-19 | 河南源宏高分子新材料有限公司 | High-flame-retardancy polyester material |
| CN116023745A (en) * | 2023-03-29 | 2023-04-28 | 山东恒旺新材料科技有限公司 | Flame-retardant ageing-resistant ethylene propylene diene monomer waterproof coiled material |
-
2020
- 2020-03-03 CN CN202010140646.5A patent/CN111303543A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114921061A (en) * | 2022-06-23 | 2022-08-19 | 河南源宏高分子新材料有限公司 | High-flame-retardancy polyester material |
| CN116023745A (en) * | 2023-03-29 | 2023-04-28 | 山东恒旺新材料科技有限公司 | Flame-retardant ageing-resistant ethylene propylene diene monomer waterproof coiled material |
| CN116023745B (en) * | 2023-03-29 | 2023-06-02 | 山东恒旺新材料科技有限公司 | Flame-retardant ageing-resistant ethylene propylene diene monomer waterproof coiled material |
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Application publication date: 20200619 |