CN111117080A - Ethylene propylene diene monomer rectangular ring material and preparation method thereof - Google Patents
Ethylene propylene diene monomer rectangular ring material and preparation method thereof Download PDFInfo
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- CN111117080A CN111117080A CN201911377695.4A CN201911377695A CN111117080A CN 111117080 A CN111117080 A CN 111117080A CN 201911377695 A CN201911377695 A CN 201911377695A CN 111117080 A CN111117080 A CN 111117080A
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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
- C08K3/16—Halogen-containing compounds
- C08K2003/168—Zinc halides
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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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
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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
- C08K2003/2248—Oxides; Hydroxides of metals of copper
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses a material of an ethylene propylene diene monomer rectangular ring, which comprises the following raw materials in parts by weight: 50-60 parts of modified ethylene propylene diene monomer, 25-35 parts of carbon black, 10-20 parts of zinc chloride, 20-30 parts of bentonite powder, 10-20 parts of vinyl chloride-vinyl acetate copolymer, 2-4 parts of isocyanate propyl triethoxysilane, 6-10 parts of nano zirconium dioxide, 5-10 parts of metal auxiliary powder, 1-3 parts of DCP (vulcanization accelerator), 1682-5 parts of antioxidant and 1-2 parts of sulfur. The modified ethylene propylene diene monomer is adopted as a matrix, the raw materials are mutually cooperated, the anti-aging effect of the material can be improved, the modified carbon nano tube is added in the modification of the ethylene propylene diene monomer, the compatibility effect with other raw materials is enhanced, and the specific surface area of the carbon nano tube in the modified carbon nano tube is large.
Description
Technical Field
The invention relates to the technical field of rectangular ring materials, in particular to an ethylene propylene diene monomer rectangular ring material and a preparation method thereof.
Background
The rectangular sealing ring belongs to the special-shaped sealing ring, the performance of the existing rectangular sealing ring is single, the raw materials for preparing the rectangular sealing ring are single, and the increasing demand for diversification of the rectangular sealing ring cannot be met. The rectangular ring is used as a common part of an automobile and is used in many parts of the automobile, such as an automobile clutch and the like.
The existing rectangular ring is serious in aging phenomenon, so that the enterprise can solve the aging resistance of the rectangular ring by adopting ethylene propylene diene monomer as matrix rubber through research, but finds that the compatibility between the ethylene propylene diene monomer and other raw materials is not very good, so that the rectangular ring is further improved and the prepared performance is more perfect.
Chinese patent publication No. CN109627526A discloses a heat-resistant mildew-proof rectangular ring and a preparation method thereof, and the rectangular ring comprises the following raw materials in parts by weight: the heat-resistant rubber material is characterized by comprising, by weight, 30-45 parts of styrene-butadiene rubber, 25-35 parts of chloroprene rubber, 5-15 parts of natural rubber, 5-10 parts of modified halloysite, 3-7 parts of sericite, 1-4 parts of kaolin, 2-6 parts of carbon black, 1-4 parts of dibutyltin methacrylate, 0.5-2 parts of ammonium polyphosphate, 0.5-2.5 parts of a silane coupling agent and 0.1-0.5 part of a mildew preventive.
Disclosure of Invention
The invention aims to provide a material of an ethylene propylene diene monomer rectangular ring and a preparation method thereof, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention also provides a material of the ethylene propylene diene monomer rectangular ring, which comprises the following raw materials in parts by weight:
50-60 parts of modified ethylene propylene diene monomer, 25-35 parts of carbon black, 10-20 parts of zinc chloride, 20-30 parts of bentonite powder, 10-20 parts of vinyl chloride-vinyl acetate copolymer, 2-4 parts of isocyanate propyl triethoxysilane, 6-10 parts of nano zirconium dioxide, 5-10 parts of metal auxiliary powder, 1-3 parts of vulcanization accelerator DCP, 1682-5 parts of antioxidant and 1-2 parts of sulfur.
Preferably, the ethylene propylene diene monomer rectangular ring is made of the following raw materials in percentage by weight:
55-60 parts of modified ethylene propylene diene monomer, 28-35 parts of carbon black, 14-20 parts of zinc chloride, 23-27 parts of bentonite powder, 14-18 parts of vinyl chloride-vinyl acetate copolymer, 3-4 parts of isocyanate propyl triethoxysilane, 8-10 parts of nano zirconium dioxide, 7-10 parts of metal auxiliary powder, 2-3 parts of vulcanization accelerator DCP, 1683-5 parts of antioxidant and 1.5-2 parts of sulfur.
Preferably, the ethylene propylene diene monomer rectangular ring is made of the following raw materials in percentage by weight:
55 parts of modified ethylene propylene diene monomer, 30 parts of carbon black, 15 parts of zinc chloride, 25 parts of bentonite powder, 15 parts of vinyl chloride-vinyl acetate copolymer, 3 parts of isocyanatopropyl triethoxysilane, 8 parts of nano zirconium dioxide, 7.5 parts of metal assistant powder, 2 parts of vulcanization accelerator, 1683.5 parts of antioxidant and 1.5 parts of sulfur.
Preferably, the preparation method of the modified ethylene propylene diene monomer comprises the following steps: the ethylene-propylene-diene monomer rubber is firstly placed in an improved carbon nano tube for reaction for 25-35min, the reaction temperature is 75-85 ℃, the reaction speed is 1000-plus-one 1500r/min, then ultrasonic dispersion is carried out for 35-45min, the ultrasonic power is 100-plus-one 500W, then the ethylene-propylene-diene monomer rubber is taken out and then subjected to melting treatment, the melting temperature is 250-plus-one 350 ℃, phenolic resin and alkyd resin are added in melting, then cooling is carried out, and then extrusion is carried out by a double-screw extruder, the extrusion temperature is 100-plus-one 110 ℃, so that the modified ethylene-propylene-diene.
Preferably, the ethylene propylene diene monomer adopts one of Japanese JREP 35 and JREP 33.
Preferably, the preparation method of the modified carbon nanotube comprises the following steps: distilling the carbon nano tube and a coupling agent KH560, finishing distillation, washing, then sending into a ball mill for ball milling, wherein the ball milling rotation speed is 1000-.
Preferably, the preparation method of the metal assistant powder comprises the following steps: mixing copper oxide powder and alumina powder according to the weight ratio of 2:1, then feeding the mixture into a calcining furnace for calcining, wherein the calcining temperature is 1000-1200 ℃, keeping the temperature after calcining, dripping the mixture by adopting a rare earth lanthanum chloride solution, and finally washing and drying to obtain the metal assistant powder.
Preferably, the calcination in the calciner is also carried out by hot pressing treatment with a pressure of 20-50 MPa.
Preferably, the speed of the pouring is 100-200 g/min.
The invention also provides a method for preparing the ethylene propylene diene monomer rectangular ring material, which comprises the following steps: the raw materials are sequentially added into an internal mixer for mixing at the mixing temperature of 105-115 ℃, and then vulcanization treatment is carried out for 5-6min at the vulcanization temperature of 180 ℃ to obtain the ethylene propylene diene monomer rectangular ring material.
Compared with the prior art, the invention has the following beneficial effects:
(1) the modified ethylene propylene diene monomer is adopted as a matrix, the ethylene propylene diene monomer adopts one of Japanese JREP 35 and JREP 33, the raw materials are mutually cooperated, the anti-aging effect of the material can be improved, the modified carbon nano tube is added in the modification of the ethylene propylene diene monomer, the compatibility effect with other raw materials is enhanced, the specific surface area of the carbon nano tube in the modified carbon nano tube is large, the carbon nano tube can be better compatible with other raw materials after coupling treatment, the carbon nano tube is better dispersed in the ethylene propylene diene monomer after grinding treatment, phenolic resin and alkyd resin are added in the melting modification of the ethylene propylene diene monomer, the bonding strength between the raw materials can be enhanced, and the problem that the ethylene propylene diene monomer is difficult to be compatible is solved.
(2) The metal assistant powder is formed by mixing copper oxide powder and aluminum oxide powder, the copper oxide powder has strong corrosion resistance and weather resistance, and is calcined with the aluminum oxide powder, the activity of the copper oxide powder in a synthetic material can be enhanced by the aluminum oxide powder, and meanwhile, the rare earth lanthanum chloride solution is dripped at high temperature after calcination, so that the rare earth lanthanum chloride solution can permeate into the metal composite powder, and the weather resistance of the metal assistant in the synthetic material is further improved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the material of the ethylene propylene diene monomer rectangular ring comprises the following raw materials in parts by weight:
50 parts of modified ethylene propylene diene monomer, 25 parts of carbon black, 10 parts of zinc chloride, 20 parts of bentonite powder, 10 parts of vinyl chloride-vinyl acetate copolymer, 2 parts of isocyanatopropyl triethoxysilane, 6 parts of nano zirconium dioxide, 5 parts of metal assistant powder, 1 parts of vulcanization accelerator DCP, 1682 parts of antioxidant and 1 part of sulfur.
The preparation method of the modified ethylene propylene diene monomer of the embodiment comprises the following steps: and (2) firstly placing the ethylene propylene diene monomer rubber in the modified carbon nano tube to react for 25min, wherein the reaction temperature is 75 ℃, the reaction speed is 1000r/min, then ultrasonically dispersing for 35min, the ultrasonic power is 100W, then taking out, carrying out melting treatment, wherein the melting temperature is 250 ℃, adding phenolic resin and alkyd resin in melting, then cooling, extruding by a double-screw extruder, and the extrusion temperature is 100 ℃ to obtain the modified ethylene propylene diene monomer rubber.
The ethylene propylene diene monomer of the embodiment adopts Japanese JREP 35.
The preparation method of the improved carbon nanotube of this embodiment is: distilling the carbon nano tube and a coupling agent KH560, finishing distillation, washing, then sending into a ball mill for ball milling, wherein the ball milling rotation speed is 1000r/min, adding ferrocene into the ball milling, and finishing ball milling to obtain the improved carbon nano tube.
The preparation method of the metal auxiliary powder in this embodiment is as follows: mixing copper oxide powder and alumina powder according to the weight ratio of 2:1, then feeding the mixture into a calcining furnace for calcining, wherein the calcining temperature is 1000 ℃, after the calcining is finished, preserving heat, dripping the mixture by adopting a rare earth lanthanum chloride solution, and finally washing and drying the mixture to obtain the metal assistant powder.
Calcination in the calciner of this example also used a 20MPa pressure for hot pressing.
The dripping speed in this example was 100 g/min.
The method for preparing the ethylene propylene diene monomer rectangular ring material comprises the following steps: the raw materials are sequentially added into an internal mixer for mixing at the mixing temperature of 105 ℃, and then vulcanization treatment is carried out for 5min at the vulcanization temperature of 180 ℃ to obtain the ethylene propylene diene monomer rectangular ring material.
Example 2:
the material of the ethylene propylene diene monomer rectangular ring comprises the following raw materials in parts by weight:
60 parts of modified ethylene propylene diene monomer, 35 parts of carbon black, 20 parts of zinc chloride, 30 parts of bentonite powder, 20 parts of vinyl chloride-vinyl acetate copolymer, 4 parts of isocyanatopropyl triethoxysilane, 10 parts of nano zirconium dioxide, 10 parts of metal assistant powder, 3 parts of vulcanization accelerator DCP, 1685 parts of antioxidant and 2 parts of sulfur.
The preparation method of the modified ethylene propylene diene monomer of the embodiment comprises the following steps: and (2) placing the ethylene propylene diene monomer rubber in the modified carbon nano tube to react for 35min at the reaction temperature of 85 ℃ and the reaction speed of 1500r/min, then ultrasonically dispersing for 45min at the ultrasonic power of 500W, then taking out, carrying out melting treatment at the melting temperature of 350 ℃, adding phenolic resin and alkyd resin in the melting process, then cooling, extruding by using a double-screw extruder at the extrusion temperature of 110 ℃, and obtaining the modified ethylene propylene diene monomer rubber.
The ethylene propylene diene monomer of the embodiment adopts Japanese JREP 35.
The preparation method of the improved carbon nanotube of this embodiment is: distilling the carbon nano tube and a coupling agent KH560, finishing distillation, washing, then sending into a ball mill for ball milling at the ball milling rotation speed of 1200r/min, adding ferrocene into the ball milling, and finishing ball milling to obtain the improved carbon nano tube.
The preparation method of the metal auxiliary powder in this embodiment is as follows: mixing copper oxide powder and alumina powder according to the weight ratio of 2:1, then feeding the mixture into a calcining furnace for calcining, wherein the calcining temperature is 1200 ℃, keeping the temperature after calcining, dripping the mixture by adopting a rare earth lanthanum chloride solution, and finally washing and drying to obtain the metal assistant powder.
Calcination in the calciner of this example also used a 50MPa pressure for hot pressing.
The dripping speed in this example was 200 g/min.
The method for preparing the ethylene propylene diene monomer rectangular ring material comprises the following steps: the raw materials are sequentially added into an internal mixer for mixing at the mixing temperature of 115 ℃, and then vulcanization treatment is carried out at the vulcanization temperature of 180 ℃ for 6min, so as to obtain the ethylene propylene diene monomer rectangular ring material.
Example 3:
the material of the ethylene propylene diene monomer rectangular ring comprises the following raw materials in parts by weight:
55 parts of modified ethylene propylene diene monomer, 30 parts of carbon black, 15 parts of zinc chloride, 25 parts of bentonite powder, 15 parts of vinyl chloride-vinyl acetate copolymer, 3 parts of isocyanatopropyl triethoxysilane, 8 parts of nano zirconium dioxide, 7.5 parts of metal assistant powder, 2 parts of vulcanization accelerator, 1683.5 parts of antioxidant and 1.5 parts of sulfur.
The preparation method of the modified ethylene propylene diene monomer of the embodiment comprises the following steps: and (2) the ethylene propylene diene monomer is firstly placed in the improved carbon nano tube to react for 30min, the reaction temperature is 80 ℃, the reaction speed is 1250r/min, then ultrasonic dispersion is carried out for 40min, the ultrasonic power is 300W, then the ethylene propylene diene monomer is taken out and subjected to melting treatment, the melting temperature is 300 ℃, phenolic resin and alkyd resin are added during melting, then cooling is carried out, extrusion is carried out by a double-screw extruder, and the extrusion temperature is 105 ℃, so that the modified ethylene propylene diene monomer is obtained.
The ethylene propylene diene monomer of the embodiment adopts Japanese JREP 35.
The preparation method of the improved carbon nanotube of this embodiment is: distilling the carbon nano tube and a coupling agent KH560, finishing distillation, washing, then sending into a ball mill for ball milling, wherein the ball milling rotating speed is 1500r/min, adding ferrocene into the ball milling, and finishing ball milling to obtain the improved carbon nano tube.
The preparation method of the metal auxiliary powder in this embodiment is as follows: mixing copper oxide powder and alumina powder according to the weight ratio of 2:1, then feeding the mixture into a calcining furnace for calcining, wherein the calcining temperature is 1100 ℃, after the calcining is finished, preserving heat, dripping the mixture by adopting a rare earth lanthanum chloride solution, and finally washing and drying the mixture to obtain the metal assistant powder.
Calcination in the calciner of this example also used a hot pressing process at a pressure of 35 MPa.
The dripping speed in this example was 150 g/min.
The method for preparing the ethylene propylene diene monomer rectangular ring material comprises the following steps: the raw materials are sequentially added into an internal mixer for mixing at the mixing temperature of 110 ℃, and then vulcanization treatment is carried out for 5.5min at the vulcanization temperature of 180 ℃ to obtain the ethylene propylene diene monomer rectangular ring material.
Comparative example 1:
the material and preparation process are basically the same as those of example 3, except that no metal additive powder is added.
Comparative example 2:
the materials and preparation process are basically the same as those of example 3, except that the materials which are conventional in the market are adopted.
The materials of examples 1-3 and comparative examples 1-2 were subjected to performance tests, the results of which are shown in Table 1
TABLE 1
As can be seen from Table 1, the retention rate of the photo-aging impact strength of the invention in example 3 is significantly improved in 1000h and the retention rate of the thermal aging impact strength in 80h and 50 ℃.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The ethylene propylene diene monomer rectangular ring material is characterized by comprising the following raw materials in parts by weight:
50-60 parts of modified ethylene propylene diene monomer, 25-35 parts of carbon black, 10-20 parts of zinc chloride, 20-30 parts of bentonite powder, 10-20 parts of vinyl chloride-vinyl acetate copolymer, 2-4 parts of isocyanate propyl triethoxysilane, 6-10 parts of nano zirconium dioxide, 5-10 parts of metal auxiliary powder, 1-3 parts of DCP (vulcanization accelerator), 1682-5 parts of antioxidant and 1-2 parts of sulfur.
2. The rectangular ethylene propylene diene monomer ring material as claimed in claim 1, wherein the rectangular ethylene propylene diene monomer ring material comprises the following raw materials in percentage by weight:
55-60 parts of modified ethylene propylene diene monomer, 28-35 parts of carbon black, 14-20 parts of zinc chloride, 23-27 parts of bentonite powder, 14-18 parts of vinyl chloride-vinyl acetate copolymer, 3-4 parts of isocyanate propyl triethoxysilane, 8-10 parts of nano zirconium dioxide, 7-10 parts of metal auxiliary powder, 2-3 parts of DCP (vulcanization accelerator), 1683-5 parts of antioxidant and 1.5-2 parts of sulfur.
3. The rectangular ethylene propylene diene monomer ring material as claimed in claim 1, wherein the rectangular ethylene propylene diene monomer ring material comprises the following raw materials in percentage by weight:
55 parts of modified ethylene propylene diene monomer, 30 parts of carbon black, 15 parts of zinc chloride, 25 parts of bentonite powder, 15 parts of vinyl chloride-vinyl acetate copolymer, 3 parts of isocyanatopropyl triethoxysilane, 8 parts of nano zirconium dioxide, 7.5 parts of metal assistant powder, 2 parts of DCP serving as a vulcanization accelerator, 1683.5 parts of antioxidant and 1.5 parts of sulfur.
4. The material of the ethylene propylene diene monomer rectangular ring according to claim 1, wherein the preparation method of the modified ethylene propylene diene monomer comprises the following steps: the ethylene-propylene-diene monomer rubber is firstly placed in an improved carbon nano tube for reaction for 25-35min, the reaction temperature is 75-85 ℃, the reaction speed is 1000-plus-one 1500r/min, then ultrasonic dispersion is carried out for 35-45min, the ultrasonic power is 100-plus-one 500W, then the ethylene-propylene-diene monomer rubber is taken out and then subjected to melting treatment, the melting temperature is 250-plus-one 350 ℃, phenolic resin and alkyd resin are added in melting, then cooling is carried out, and then extrusion is carried out by a double-screw extruder, the extrusion temperature is 100-plus-one 110 ℃, so that the modified ethylene-propylene-diene.
5. The rectangular ring of EPDM rubber as claimed in claim 4, wherein said EPDM rubber is one of Japanese JREP 35 and JREP 33.
6. The material of the ethylene propylene diene monomer rectangular ring according to claim 4, wherein the preparation method of the improved carbon nanotube comprises the following steps: distilling the carbon nano tube and a coupling agent KH560, finishing distillation, washing, then sending into a ball mill for ball milling, wherein the ball milling rotation speed is 1000-.
7. The material of the ethylene propylene diene monomer rectangular ring according to claim 1, wherein the preparation method of the metal auxiliary powder comprises the following steps: mixing copper oxide powder and alumina powder according to the weight ratio of 2:1, then feeding the mixture into a calcining furnace for calcining, wherein the calcining temperature is 1000-1200 ℃, keeping the temperature after calcining, dripping the mixture by adopting a rare earth lanthanum chloride solution, and finally washing and drying to obtain the metal assistant powder.
8. The rectangular ethylene propylene diene monomer ring material as claimed in claim 7, wherein the calcination in the calciner further adopts a pressure of 20-50MPa for hot pressing.
9. The material of the ethylene propylene diene monomer rectangular ring as claimed in claim 7, wherein the speed of the pouring is 100-200 g/min.
10. A method for preparing the rectangular ethylene propylene diene monomer loop material as claimed in any one of claims 1 to 9, comprising the steps of: the raw materials are sequentially added into an internal mixer for mixing at the mixing temperature of 105-115 ℃, and then vulcanization treatment is carried out for 5-6min at the vulcanization temperature of 180 ℃ to obtain the ethylene propylene diene monomer rectangular ring material.
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