691 results about "Ethylene propylene rubber" patented technology

The environment-friendly cable ethylene-propylene insulation material comprises the following raw materials: ethylene propylene diene monomer, an elastomer, a reinforcing agent, a flame retardant, a vulcanizing activator, a filler, a plasticizer, an anti-aging agent, a vulcanizing agent and a silane coupling agent. 50-70 parts by mass of ethylene propylene diene monomer rubber; the elastomer is a POE (polyolefin elastomer) of 30-50 parts; the flame retardant is prepared from 30 to 50 parts of nano magnesium hydroxide, 5 to 10 parts of microencapsulated red phosphorus and 3 to 5 parts of zinc borate; and the plasticizer is paraffin oil. According to the ethylene-propylene insulating material, a halogen-free flame-retardant system is combined with an interface modification technology, so that the defects of poor mechanical property and high material toxicity of a traditional material are overcome. The oxygen index is greater than or equal to 38%, the tensile strength is greater than or equal to 10Mpa, and the material is suitable for high-risk mine environments.

The invention discloses a corrosion-resistant anti-cracking cable sheath material and a preparation method thereof, and belongs to the technical field of cable materials. The sheath material is prepared by adopting ethylene-vinyl acetate rubber and ethylene-propylene-diene monomer rubber as matrixes, adding graphene modified conductive carbon black and self-repairing microcapsules in a specific proportion, and carrying out banburying premixing, open milling feeding, dynamic vulcanization and other multi-step processes. Graphene and carbon black form a stable conductive network according to a specific ratio under the action of a silane coupling agent, urea resin is taken as a wall material of the self-repairing microcapsule, epoxy resin and a curing agent in a core material are in a specific ratio, and the repairing efficiency is ensured. The tensile strength retention rate of the material is greater than or equal to 92% and the elongation at break retention rate is greater than or equal to 88% after the material is aged for 1500 hours in a salt mist environment, the strength recovery rate of microcracks reaches 85% or above after the microcracks are subjected to heat treatment at 70 DEG C for 2 hours, and the material has excellent corrosion resistance, cracking resistance, self-repairing function and static dissipation capacity and is particularly suitable for cable protection in severe environments such as marine transportation and chemical engineering.

The invention relates to the technical field of cables, and provides a corrosion-resistant control cable and a preparation method thereof. The corrosion-resistant control cable sequentially comprises a conductor, an insulating layer, a shielding layer and a sheath layer from inside to outside, wherein the sheath layer comprises the following components in parts by weight: 50-70 parts of polyvinyl chloride, 15-25 parts of ethylene propylene diene monomer, 10-20 parts of modified graphene oxide, 0.5-1.5 parts of an antioxidant, 3-5 parts of a plasticizer, 15-20 parts of a flame retardant, 2-4 parts of a compatilizer, 4-5 parts of an active agent, 1-3 parts of an assistant crosslinking agent and 1-3 parts of a crosslinking agent; wherein the modified graphene oxide is obtained by modifying graphene oxide with dimethyl 5-hydroxyisophthalate and N-hydroxymethyl acrylamide. According to the technical scheme, the problem of insufficient corrosion resistance of the control cable in the prior art is solved.

The invention relates to the technical field of automobile sealing strips, and provides an anti-aging rubber sealing strip for an automobile and a preparation method of the anti-aging rubber sealing strip. The anti-aging rubber sealing strip for the automobile comprises the following components in parts by weight: 55-70 parts of ethylene propylene rubber, 30-45 parts of ethylene propylene diene monomer, 4-8 parts of an anti-aging agent, 35-60 parts of a filling agent, 3-7 parts of a softening agent, 8-10 parts of a plasticizer, 1.2-2.5 parts of an accelerant, 4-8 parts of zinc oxide and 1-2 parts of a vulcanizing agent. The anti-aging agent comprises diatomite-loaded tea polyphenol and a diatomite-loaded anti-aging agent. By means of the technical scheme, the problem that in the prior art, an automobile rubber sealing strip is poor in aging resistance is solved.

The invention discloses a high-strength epoxy-based adhesive and a preparation method thereof, and relates to the technical field of epoxy-based adhesives, the high-strength epoxy-based adhesive comprises the following components: 80-120 parts of epoxy resin; 20-40 parts of a curing agent; 10-35 parts of ethylene propylene diene monomer powder; 5 to 20 parts of toughening resin; 30-80 parts of an inorganic filler; 0.5 to 3 parts of a coupling agent; 0.5 to 2 parts of an auxiliary agent; the preparation is performed based on the formula. According to the invention, the ethylene propylene diene monomer powder is introduced into an epoxy resin system and is matched with the toughening resin, the inorganic filler and the coupling agent for collaborative design, so that the impact resistance and deformation adaptability of a cured adhesive layer are remarkably improved while the adhesive keeps relatively high bonding strength and structural stability; the obtained high-strength epoxy-based adhesive has good mechanical properties, construction performance and engineering adaptability, and is suitable for popularization and application under various complex working conditions.

The invention relates to the technical field of sealing strips, and provides a tensile rubber sealing strip for an automobile and a preparation method of the tensile rubber sealing strip. The rubber sealing strip is prepared from, by weight, 65-75 parts of ethylene propylene diene monomer, 25-35 parts of chloroprene rubber master batch, 30-40 parts of thermoplastic polyurethane elastomer, 30-40 parts of filler, 1-2 parts of vulcanizing agent, 8-12 parts of vulcanization accelerator, 3-5 parts of plasticizer, 3-5 parts of anti-aging agent, 1-2 parts of stearic acid and 2-4 parts of zinc oxide, and the chloroprene rubber master batch is prepared from chloroprene rubber and 4-N-carbobenzoxy amino cyclohexanone. By means of the technical scheme, the problem that in the prior art, the rubber sealing strip is insufficient in tensile property is solved.

The invention relates to the technical field of rail transit rubber materials, and particularly discloses a rubber isolation layer material for a ballastless track and a preparation method, the rubber isolation layer material comprises the following components by weight: 60-70 parts of ethylene propylene diene monomer, 20-30 parts of polystyrene, 30-40 parts of nitrile rubber / polylactic acid thermoplastic elastomer, 20-30 parts of porous polymer microspheres, and 15-20 parts of maleic anhydride grafted graphene oxide. The material is prepared from 10-15 parts of organic montmorillonite, 3-4 parts of a vulcanization activator, 3-4 parts of an anti-aging agent, 3-4 parts of a vulcanization accelerator, 1-3 parts of a vulcanizing agent, 4-6 parts of a dispersing agent and 3-6 parts of a foaming agent. By adding various creatively combined reinforcing fillers into the ethylene propylene diene monomer, the mechanical properties such as hardness, tensile strength, static rigidity and the like and the insulation and shock absorption properties of the isolating layer are greatly improved, and meanwhile, carbon black does not need to be added, so that the problems that the resistance of a product is reduced and the insulation property becomes poor after the carbon black is added are avoided.

The invention discloses a cold-resistant high-temperature-resistant hydraulic hose rubber material which comprises the following components in parts by mass: 65-75 parts of nitrile rubber, 5-15 parts of butadiene rubber, 5-10 parts of silicone rubber, 5-10 parts of ethylene propylene rubber, 5-10 parts of hydrogenated nitrile rubber, 10-15 parts of white carbon black VN3, 110-130 parts of carbon black N762, 5-8 parts of a plasticizer DOS, 5-8 parts of a plasticizer TP-90B, 3-5 parts of zinc oxide, 0.5-1.0 part of stearic acid, 1-2 parts of an anti-aging agent KY-405 and 1-2 parts of an anti-aging agent RD. The invention relates to an environment-friendly adhesive which is prepared from the following components in parts by weight: 0.5 to 1.0 part of microcrystalline wax Antilux 654, 3 to 5 parts of homogeneous resin 40MSF, 1.5 to 2.5 parts of sulfur, 1.0 to 1.5 parts of accelerant CZ, 1.5 to 2.5 parts of peroxide F40P-SP2, 0.5 to 1.0 part of assistant cross-linking agent SK8911D70 and 5 to 7 parts of Ricobond 1731HS. The material has excellent low-temperature bending property (less than or equal to-60 DEG C), hot oil resistance, thermal aging resistance and copper-plated steel wire bonding property, and is suitable for hydraulic hose manufacturing in an extreme environment.

The invention relates to the field of cables, and discloses a flame-retardant extruded and insulated low-voltage power cable, which comprises a conductor core, an insulating layer, a filling layer, an inner sheath layer, an armor layer and an outer sheath layer, and is characterized in that the sheath layer is made of low-density polyethylene, ethylene propylene diene monomer, ethylene-tetrafluoroethylene copolymer, modified halloysite nanotubes, modified ammonium polyphosphate and auxiliaries; the modified halloysite nanotube is prepared by loading titanium dioxide on the surface of a halloysite nanotube by using a sol-gel method and then grafting octa-aminopropyl polyhedral oligomeric silsesquioxane; the modified ammonium polyphosphate is prepared by grafting a functional silane coupling agent prepared by reacting a cyclotriphosphazene derivative with 3-chloropropyltrimethoxysilane with polysiloxane-coated ammonium polyphosphate, and the cyclotriphosphazene derivative is prepared by reacting 3-amino-1, 2, 4-triazole with hexachlorocyclotriphosphazene and then coordinating with cobalt ions by adopting a hydrothermal method. Therefore, the material is endowed with good mechanical properties, ultraviolet resistance, heat and wear resistance, flame retardance and antibacterial activity.

The invention discloses a rubber composite material, a steel-rubber composite lining plate and a preparation process thereof, and the rubber composite material comprises the following raw materials: natural rubber, butadiene styrene rubber, ethylene propylene diene monomer, dual-modified white carbon black, organic modified rectorite, reinforced fibers, a vulcanizing agent, a vulcanization accelerator, an anti-aging agent, a softening agent and an activating agent. The reinforced fibers are formed by compounding modified carbon fibers and aramid pulp. The steel-rubber composite lining plate comprises a steel plate base body, a rubber composite layer and an interface bonding layer, the rubber composite layer and the steel plate base body are vulcanized and formed through the interface bonding layer, a dovetail-shaped groove is formed in the surface of the steel plate and subjected to plasma treatment, and the interface bonding layer is a coupling agent and a liquid rubber prepolymer. The rubber composite material disclosed by the invention has excellent tensile strength, wear resistance and aging resistance; the steel-rubber composite lining plate is firm in interface bonding, effectively solves the problem of rubber layer stripping under high-temperature and impact working conditions, and effectively prolongs the service life when being applied to equipment such as a mill.

The invention relates to the field of sheath materials, and discloses an anti-aging sheath material for an electronic wire and a preparation method thereof, the sheath material comprises low density polyethylene, an ethylene-vinyl acetate copolymer, an ethylene-octene copolymer, ethylene propylene diene monomer, a triazine ring derivative, ammonium polyphosphate, modified nano silicon dioxide and an auxiliary agent; according to the triazine ring derivative, N-butyl-2, 2, 6, 6-tetramethyl-4-piperidylamine reacts with cyanuric chloride to prepare a triazine ring monosubstituent, hydrazine hydrochloride is used as a bridging agent to react with the triazine ring monosubstituent, and the triazine ring derivative and piperazine are polymerized to prepare the triazine ring derivative. The modified nano silicon dioxide is prepared by enabling 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride and 4-propenyloxy-2-hydroxybenzophenone to react, and carrying out free radical polymerization on the reaction product on the surface of the nano silicon dioxide. The synergistic effect of mechanical property, thermo-oxidative aging resistance, ultraviolet aging resistance and flame retardant property is realized.

The invention discloses a high-strength bamboo-plastic composite material which comprises the following components in parts by mass: 30-55 parts of modified bamboo powder; 20 to 40 parts of high melt index polypropylene; 15 to 30 parts of low melt index polypropylene; 3 to 5 parts of maleic anhydride grafted polypropylene; 5 to 14 parts of maleic anhydride grafted POE (Polyolefin Elastomer); 5-8 parts of ethylene propylene diene monomer; the modified bamboo powder is prepared by carrying out microwave treatment, dilute alkali liquor treatment, composite enzymolysis and grafting modification on bamboo powder. The high-strength bamboo-plastic composite material provided by the invention is high in bamboo powder filling content, environment-friendly and good in mechanical property, the tensile strength can reach 33 MPa or above, the bending strength can reach 55 MPa or above, the normal-temperature toughness and the low-temperature toughness are remarkably improved, the notch impact strength at the temperature of-20 DEG C can reach 8 kJ / m < 2 > or above, and the processing fluidity is good; the method is suitable for industrial processing technologies such as injection molding and extrusion, and has great market value.

The invention relates to the technical field of high polymer material and automobile part manufacturing, and discloses a high-durability high-low temperature resistant automobile composite sealing strip, which is prepared from the following raw materials: ethylene propylene diene monomer, polyisoprene grafted maleic anhydride, pre-dispersed master batch, carbon black and a vulcanization system. The pre-dispersed master batch takes oxidized polyethlene wax as a carrier to wrap zinc oxide and D-mannitol. The phase change characteristic of the carrier is utilized, active components are isolated in the mixing and extruding stage, and scorching is prevented; the components are released in the high-temperature vulcanization stage to initiate anhydride ring opening, and a double cross-linked network with coexistence of covalent bonds and ionic bonds is constructed. According to the sealing strip, the macromolecular reactive plasticizer is used for replacing part of liquid paraffin, the atomization problem caused by micromolecule migration is solved, the high-temperature compression permanent deformation rate is remarkably reduced through a thermal reversible mechanism of an ion cluster, and excellent low-temperature rebound resilience and processing safety are both considered.

The invention discloses a durable corrosion-resistant water-stop belt and a preparation method thereof, and relates to the technical field of compositions containing polyisobutene high-molecular compounds. The durable corrosion-resistant water-stop belt is prepared from the following raw materials in parts by mass: 30 to 60 parts of ethylene propylene diene monomer, 20 to 40 parts of polyisobutene, 20 to 50 parts of filler, 0.5 to 3 parts of antioxidant, 0.5 to 3 parts of anti-aging agent, 1 to 5 parts of peroxide cross-linking agent and 1 to 10 parts of processing aid. Through the synergistic effect of the specific anti-aging agent and the antioxidant, photo-oxidative aging and thermo-oxidative aging of the material are effectively inhibited. The anti-aging agent absorbs ultraviolet rays and converts the ultraviolet rays into heat energy to prevent the ultraviolet rays from damaging polymer chains; and the antioxidant delays oxidative degradation. The two layers form double protective barriers, so that the service life of the waterstop is greatly prolonged, and the performance attenuation trend is slowed down. Through material innovation (anti-aging agent + PBS + EPDM) and process optimization (segmented mixing / cooling), three core advantages of prolonging the service life, strengthening corrosion resistance and improving construction convenience are synchronously realized.

The invention provides a high-toughness bundling grating and a production process of the high-toughness bundling grating. The composite material is prepared from the following raw materials in parts by weight: 32 to 42 parts of epoxy modified unsaturated polyester resin, 26 to 36 parts of alkali-free glass fiber, 7 to 11 parts of metallocene polyolefin, 5 to 9 parts of high-branching-degree polyolefin, 4 to 8 parts of ethylene propylene diene monomer, 2.5 to 5.5 parts of core-shell structure elastomer toughening agent, 1.5 to 4.5 parts of modified nano aluminum nitride-graphene composite filler, 0.7 to 1.1 parts of silane coupling agent and 0.5 to 0.9 part of antioxidant. 0.4 to 0.7 part of ultraviolet stabilizer, 0.4 to 0.8 part of calcium stearate and 0.1 to 0.3 part of conductive additive. According to the invention, the core-shell structure elastomer toughening agent realizes toughening without damaging strength through core-shell synergy, and the impact strength is improved by 40% or above; the modified nano aluminum nitride-graphene composite filler constructs a heat conduction-antistatic network, and the modified nano aluminum nitride-graphene composite filler and the metallocene polyolefin are matched with the high-branching-degree polyolefin and the ethylene propylene diene monomer to enhance low-temperature toughness and creep resistance.

The invention relates to a low-temperature-bending-resistant data line and a preparation method thereof. The low-temperature-bending-resistant data line comprises the following components in parts by weight: 45-65 parts of TPU, 8-12 parts of polypropylene, 15-25 parts of ethylene propylene diene monomer, 10-12 parts of a plasticizer, 10-16 parts of a modified flame retardant, 1-2 parts of a modified anti-aging agent, 1-2 parts of a lubricant and 1-2 parts of a coupling agent. The modified flame retardant achieves efficient environment-friendly flame retardance through phosphorus-oxygen-silicon synergism, gamma-glycidyl ether oxypropyl trimethoxy silane promotes surface char formation, delays combustion and reduces smoke generation, hydroxybenzophenone in the modified anti-aging agent resists ultraviolet rays through electron transition and converts the ultraviolet rays into heat energy, a maleimide group improves the glass transition temperature of the material, and the flame-retardant performance of the material is improved. A six-membered ring structure and N-phenylmaleimide are cooperated, so that high-temperature yellowing is reduced; the low-temperature-bending-resistant data line prepared by the invention not only has a good flame-retardant effect, but also has an excellent anti-aging effect.

The invention relates to the technical field of cable accessories, in particular to a high-strength cable accessory and a preparation method thereof. The high-strength cable accessory comprises a semiconductor layer and an insulating layer, and the semiconductor layer is prepared from, by weight, 10-15 parts of low-density polyethylene, 75-85 parts of polyolefin thermoplastic elastomer, 8-12 parts of ethylene propylene diene monomer, 25-40 parts of silane coupling agent grafted graphene nanosheets and 4-6 parts of maleic anhydride grafted modified ethylene-octylene copolymer. The composition comprises the following components in parts by weight: 1.0-2.0 parts of zinc stearate, 1.0-2.0 parts of an antioxidant, 2.0-3.5 parts of trimethylolpropane trimethacrylate and 1.5-2.2 parts of dicumyl peroxide. According to the high-strength cable accessory provided by the invention, the overall mechanical property, thermal stability and conductivity of the composite material and the mechanical strength, breakdown field strength and insulating property of the insulating layer are improved.

This invention discloses a carbon fiber reinforced self-healing sensing integrated special cable and its preparation method, belonging to the technical field of power cable insulation materials and special cable manufacturing. The cable, from the inside out, includes a conductor, an inner shielding layer, a self-healing insulation layer, a reinforced outer shielding layer, a distributed optical fiber sensing layer, and a sheath layer. The self-healing insulation layer employs a dual dynamic covalent network and a biomimetic intelligent microcapsule composite system to achieve rapid response and multiple repairs. The reinforced outer shielding layer is a semi-conductive ethylene propylene rubber composite material reinforced with short-cut carbon fibers, forming a three-dimensional stress transfer network to enhance mechanical strength. The distributed optical fiber sensing layer enables temperature strain monitoring and damage localization. This invention constructs an integrated protection system combining physical prevention, precise repair, long-term self-healing, and intelligent sensing. The repair response time is no more than 12 hours, the repair rate is no less than 95%, the electrical tree inhibition rate is no less than 90%, and it can be repaired multiple times, adapting to the complex working conditions of high-end equipment.

The invention provides a cable material as well as a preparation method and application thereof, and the cable material comprises the following components in parts by weight: 25-45 parts of polypropylene resin, 25-45 parts of elastomer, 80-100 parts of flame retardant, 1-3 parts of antioxidant and 1-2 parts of lubricant. The elastomer comprises any one or a combination of at least two of a styrene-butadiene-styrene block copolymer, an ethylene propylene diene monomer or an ethylene-vinyl acetate copolymer. The polypropylene resin and the elastomer are blended, so that the mechanical strength, the environmental adaptability and the aging resistance of the cable material are comprehensively improved while excellent electrical insulation performance of the cable material is maintained; the halogen-free flame retardant is added, so that the release of smoke and toxic gas is reduced, and an efficient and environment-friendly flame-retardant effect is realized.

The application belongs to the technical field of rubber processing, and provides an ethylene-propylene rubber crushing device, which comprises a crushing chamber, a feeding port is arranged at the top of the crushing chamber, a discharging port is arranged at the bottom of the crushing chamber, and two crushing rollers are rotationally connected in the crushing chamber, characterized in that the device further comprises a material-dredging rod which is rotationally connected in the discharging port and is used for dredging the material at the discharging port. The material-dredging rod is rotationally connected in the discharging port, and the driving mechanism is used to drive the material-dredging rod to realize forward and reverse swing, so that the material at the discharging port can be continuously actively stirred and dredged, the material accumulation and bridging phenomenon can be effectively destroyed, the problem of easy blockage of the discharging port of the traditional crushing device is completely solved, the smooth discharge is ensured, and the continuous operation capacity is improved.

This invention discloses an ablation-resistant EPDM rubber insulation material, its preparation method, and its application. The ablation-resistant EPDM rubber insulation material, by weight, comprises the following components in parts: 100 parts EPDM rubber, 1-20 parts VPL-modified fibers, 10-50 parts reinforcing filler, 5-30 parts flame retardant, 0.5-5 parts vulcanizing agent, and 0.5-5 parts co-crosslinking agent. This invention improves the thermodynamic compatibility between the fibers and EPDM rubber by modifying the fibers with the interfacial compatibility agent VPL latex, thereby obtaining the ablation-resistant EPDM rubber insulation material.

The utility model discloses an anti-corrosion garbage pipeline baffle device, and relates to the technical field of garbage pipelines. Comprising a mounting pipe frame, a sliding groove is formed in the inner wall of the mounting pipe frame, and a blocking assembly is arranged on the inner wall of the sliding groove. At the moment, the multiple compression springs extend to push the two ethylene propylene rubber plates to move, so that the protruding end of the right ethylene propylene rubber plate abuts against the inner wall of a sealing groove formed in the side wall of the left ethylene propylene rubber plate, and therefore the inner wall of the mounting pipe frame is blocked; secondly, when the two ethylene propylene rubber plates abut against each other, the fluororubber disc is pulled through an oil rope, so that the surface of the fluororubber disc tightly abuts against a conical arc edge formed in the top face of the mounting pipe frame, and the probability that the fluororubber disc is corroded by acid-base components in the garbage pipeline through the two ethylene propylene rubber plates is reduced; and therefore, harmful gas in the garbage pipeline is prevented from polluting air through the fluororubber disc.

The utility model discloses a coagulation kettle for producing ethylene propylene diene monomer, which comprises a coagulation kettle body, a first solution is added in the coagulation kettle body, a stirring device is arranged in the coagulation kettle body, and the stirring device comprises a first stirring paddle; a steam conveying device and a steam spraying device are further arranged in the condensation kettle body, the steam conveying device can convey first steam into the condensation kettle body to generate first bubbles, the first steam makes contact with a first solution to release heat, and the first solution receives the heat and finally boils to generate second bubbles. The first bubbles and the second bubbles float upwards and can absorb impurities in the first solution, and the purpose of impurity removal of the first solution is achieved; the steam spraying device can spray second steam into the condensation kettle body, and the second steam can stir the first solution, so that condensed blocks are removed, the first stirring paddle continuously rotates, the situation that the first stirring paddle is stuck due to condensation of the first solution is avoided, the stirring device is prevented from being damaged, and the accident occurrence probability is reduced.

The invention relates to a flame-retardant and heat-conducting EPDM (Ethylene-Propylene-Diene Monomer) foaming sealing gasket and a preparation method thereof and belongs to the technical field of rubber materials. The sealing gasket takes ethylene propylene diene monomer as a matrix, and the core is that 8-25 parts of expandable graphene grafted and modified by an epoxy silane coupling agent is added as a functional filler, and 10-30 parts of epoxidized soybean oil is matched as a bio-based active plasticizer. In a peroxide cross-linking system, the three components form an integrated cross-linking network through chemical reaction, so that the sealing gasket has good heat conductivity, flame retardance and stability. The preparation method is controllable in process and suitable for industrial production. The sealing gasket is suitable for new energy automobile battery packs, energy storage equipment and other occasions with comprehensive requirements for sealing, heat dissipation and fire prevention.

The application relates to the technical field of shoe sole materials, in particular to a foamed composite material and application of the foamed composite material in shoe materials, which comprises EVA resin, ethylene-propylene-diene rubber, wear-resistant particles, a filler, a foaming agent, a crosslinking agent, a lubricant and an activator; wherein the wear-resistant particles are modified porous corundum, which is obtained by in-situ ring-opening polymerization of flexible PCL chains in and outside the pores of the porous corundum after surface activation; and the flexible PCL chains further have polyethylene glycol-stearic acid polymer brushes. Compared with the prior art, the application has the beneficial effects that: the EVA provides good processability and elasticity, the ethylene-propylene-diene rubber endows the material with excellent low-temperature performance and aging resistance; the corundum core of the modified porous corundum provides a high-hardness wear-resistant framework, significantly reduces the abrasion amount in a unit volume, the polycaprolactone main chain and the polyethylene glycol-stearic acid side chain compensate the rigidity of the corundum, and guarantee the high resilience, especially the low-temperature resilience, of the EVA material.

The application discloses an insulating EPDM composite material and a preparation method thereof, and belongs to the technical field of rubber preparation. First, boron nitride is dispersed in a dispersing agent, a coupling agent is added, and modified boron nitride is obtained by drying; the modified boron nitride is dispersed in polyisobutylene in a molten state, and polyisobutylene@boron nitride composite powder is obtained after freezing, crushing and sieving; EPDM, the polyisobutylene@boron nitride composite powder, a conductive agent and an antioxidant are mixed; finally, a vulcanizing agent is added to the S3 mixed system, and the insulating EPDM composite material is obtained after vulcanization is completed. The insulating EPDM composite material provided by the application has excellent electrical insulation performance and electrical resistance, can effectively prevent electrical tree aging, and prolongs the service life of the product.

This invention discloses a EPDM rubber and its preparation method, comprising copolymerizing the EPDM rubber from a first structural unit provided by ethylene, a second structural unit provided by propylene, and a third structural unit provided by a polyene monomer. This invention achieves precise control of the molecular structure of the EPDM rubber by introducing a polyene monomer with a specific structure as the third monomer, and combining it with a restricted geometry catalyst or a vanadium-based catalyst, thereby improving the uniformity of the copolymer and the vulcanization efficiency. The resulting rubber exhibits a narrow molecular weight distribution, suitable Mooney viscosity, and good processing properties, making it suitable for high-performance rubber products. The preparation method is simple, environmentally friendly, and easy to industrialize.

The invention relates to the technical field of rubber, and provides a high-strength rubber transmission belt as well as a preparation method and application thereof. The high-strength rubber transmission belt is prepared from the following raw materials in parts by weight: 90 to 110 parts of ethylene propylene diene monomer, 6 to 10 parts of aramid fiber, 3 to 9 parts of nylon, 40 to 50 parts of filler, 4 to 6 parts of vulcanizing activator, 5 to 9 parts of paraffin oil, 4 to 7 parts of adhesive, 3 to 4 parts of anti-aging agent, 11 to 15 parts of auxiliary vulcanizing agent, 2 to 4 parts of vulcanizing agent and 0.1 to 0.5 part of scorch retarder. The filler is prepared from the following raw materials in parts by weight: 100 parts of carbon black, 5 to 7 parts of 4-maleimidobenzoic acid and 5 to 7 parts of 2, 2-dimethylolpropionic acid. Through the technical scheme, the problem of insufficient strength of the rubber transmission belt in the related technology is solved.

The invention relates to the technical field of olefin catalyst polymerization, in particular to a preparation method of ethylene propylene diene monomer. The method comprises the following steps: carrying out anhydrous oxygen operation treatment on a polymerization reaction kettle by using a vacuum-gas raw material replacement method, introducing a gas raw material prepared in proportion into the polymerization reaction kettle to achieve the required polymerization original pressure, continuously introducing a main catalyst, a cocatalyst, a hexane solvent and ethylidene norbornene into the polymerization reaction kettle at the same time, starting a polymerization reaction; and introducing circulating cooling water into an outer jacket of the polymerization reaction kettle in the reaction process to maintain the stability of the polymerization reaction temperature, inactivating the polymerization system after the polymerization reaction is finished, removing the solvent, and drying to obtain the ethylene propylene rubber. The prepared ethylene propylene diene monomer is high in stability, the molecular mass of the product is controllable, and the molecular mass distribution is obviously narrowed.

The invention discloses an anti-aging flame-retardant tire rubber composition and a preparation method thereof, and belongs to the technical field of rubber tires. The rubber composition comprises the following components in parts by weight: 60-60 parts of natural rubber; 80 parts of butadiene rubber and 10 parts of butadiene rubber; 20 parts of organic silicon modified ethylene propylene rubber; 30 parts of a reinforcing filler; 50 parts of nano boron nitride; 8 parts of nano zinc oxide; 5 parts of stearic acid; 2 parts, 1.5 parts of sulfur; 2.5 parts of the raw materials and 1-2 parts of an accelerant; 3 parts of an anti-aging agent; 4 parts; the reinforcing filler is a mixture of modified white carbon black and modified montmorillonite according to the formula of (2 angstrom; and 4) a mass ratio of 1: 1. Through the synergistic effect of the organic silicon modified rubber and the modified montmorillonite, the rubber material has excellent mechanical properties, aging resistance and flame retardance, and the limit oxygen index reaches 33.5 angstroms; 35.8%, and vertical combustion V <->; the tensile strength retention rate after thermo-oxidative aging exceeds 91%, and the material can be widely applied to the high-requirement fields of lorries, engineering machinery, new energy automobiles and the like.