360 results about "Dicumyl peroxide" patented technology

The invention belongs to the technical field of flame retardants, and particularly relates to a high-thermal-stability polyphosphate flame retardant and a preparation method thereof. The DOPO is modified through the polyethylene glycol acrylate, methyl methacrylate and dicumyl peroxide composite solution, double bonds of the polyethylene glycol acrylate and P-H bonds of the DOPO can be subjected to nucleophilic addition to form stable C-P bonds, and thermal migration of the DOPO is hindered; dOPO has polymerization double bonds of methyl methacrylate and long carbon chains of polyethylene glycol acrylate, so that the compatibility of the polyphosphate flame retardant and a polymer substrate is improved, and phase separation is avoided; maleic anhydride grafted silicone oil is connected to the surface of an amino modified gamma-cyclodextrin-modified DOPO inclusion compound, so that the polyphosphate flame retardant has high thermal stability and high compatibility after long-chain alkyl modification; amino groups in the modified gamma-cyclodextrin react with maleic anhydride grafted silicone oil to generate an amido bond cross-linked network, so that the thermal migration of DOPO is reduced together, and the high thermal stability of the polyphosphate flame retardant is improved.

Provided are a water-resistant wood-plastic reinforced composite flooring and a manufacturing method therefor. Wood flour is boiled in boiling water for 3-4 hours, filtered and dried, to obtain dried wood flour; polypropylene, butyl acrylate, methyl methacrylate, maleic anhydride and dicumyl peroxide are mixed evenly, extruded and granulated, and dried to obtain a compatibilizer; the dried wood flour and polypropylene are mixed evenly, the compatibilizer is added and mixed evenly, then extrusion and granulation, and injection molded, are performed, to obtain a wood-plastic flooring blank; a composite resin emulsion and a photoinitiator are ultrasonically mixed evenly, and the wood-plastic flooring blank is immersed therein, then taken out and dried at room temperature, and then vacuum dried and UV cured, to obtain water-resistant wood-plastic reinforced composite flooring.

The invention provides a low-smoke halogen-free flame-retardant cable material and a preparation method thereof, and belongs to the field of cable materials. The low-smoke halogen-free flame-retardant cable material is prepared from the following chemical components: 32 to 40 parts of nitrile rubber, 22 to 27 parts of natural rubber, 8 to 12 parts of benzoxazole-siloxane copolymer containing phosphate dynamic bonds, 13 to 15 parts of core-shell-sheath three-stage structure flame retardant, 4 to 6 parts of hexaphenoxy cyclotriphosphazene modified carbon nanotubes, 2 to 3 parts of europium-doped mesoporous cerium dioxide and 3 to 4 parts of nano zinc oxide. The composite material is prepared from the following components in parts by weight: 3 to 4 parts of carbon nanotube grafted montmorillonite hybrid, 2 to 3 parts of lubricant, 0.8 to 1.2 parts of cross-linking agent, 0.3 to 0.4 part of accelerant, 0.4 to 0.6 part of dicumyl peroxide and 0.1 to 0.2 part of antioxidant. Unification of high flame retardance, low smoke, excellent mechanical property and processability of the cable material is realized.

The invention discloses a flexible fireproof cable and a preparation method thereof, and belongs to the technical field of cables. The cable comprises a conductor, a mica insulation layer, a copper protection layer, a buffer layer and a cable sheath layer. The buffer layer is made of a polyurethane foaming material; the cable sheath layer is prepared from the following components in parts by weight: 80 to 100 parts of methyl vinyl silicone rubber, 18 to 20 parts of modified carbon black, 5 to 8 parts of titanium dioxide, 1 to 2 parts of platinum catalyst, 3 to 6 parts of hydroxyl silicone oil, 0.5 to 1 part of zinc stearate and 0.8 to 1 part of dicumyl peroxide. The modified carbon black is added into the raw materials of the sheath layer, so that the compatibility, the interface bonding force and the flame retardant property of the carbon black and a silicone rubber matrix are effectively improved, and the mechanical property, the wear resistance and the fireproof property of the cable sheath layer are remarkably enhanced.

The invention relates to the technical field of cables, and provides a high-temperature-resistant flame-retardant power cable and a preparation method thereof. A high-temperature-resistant flame-retardant power cable comprises a conductor and a high-temperature-resistant flame-retardant outer layer wrapping the conductor. The high-temperature-resistant flame-retardant outer layer is prepared from the following raw materials in parts by weight: linear low-density polyethylene, an ethylene-vinyl acetate copolymer, ethylene propylene diene monomer, chopped polyimide fibers, nano-coated magnesium hydroxide, zinc borate, zinc stannate, polyethylene grafted maleic anhydride, an anti-aging agent, dicumyl peroxide, an antioxidant, polyethylene wax, calcium stearate and cerium dioxide. According to the cable prepared in the invention, the reliability of an existing high-temperature-resistant flame-retardant power cable under thermal cycle is improved, and the problem of local temperature resistance difference caused by agglomeration and high-temperature migration of nanoparticles in a polymer matrix is improved.

The invention discloses a sheath material for a saline-alkaline-resistant dragging cable, a preparation method of the sheath material, the cable and the sheath material. The sheath material is prepared from the following raw materials in parts by weight: 40 to 45 parts of chlorinated polyethylene, 1.5 to 2.0 parts of dicumyl peroxide vulcanizing agent, 2 to 2.5 parts of triisocyanate vulcanizing agent, 0.1 to 0.3 part of ethylene thiourea accelerant, 0.05 to 0.15 part of anti-aging agent RD, 4 to 5 parts of metal oxide, 1 to 1.5 parts of paraffin, 8 to 10 parts of calcium carbonate, 15 to 21 parts of reinforcing agent, 1 to 1.5 parts of lead stearate, 0.5 to 1 part of lead sulfate tribasic, 1 to 1.5 parts of ultraviolet light absorber, 3 to 5 parts of epoxidized soybean oil and 8 to 8 parts of chlorinated paraffin. 9 parts of antimony trioxide and 3-4 parts of antimony trioxide. The cable has the advantages of ultraviolet resistance, no salt deposition, water resistance, tensile resistance, cold resistance and the like, can be used for a long time in a special operating environment, has the service life of at least more than 3 years, and avoids frequent replacement of the cable by a user.

The invention relates to the technical field of crosslinked polyethylene insulated power cables, in particular to a flame-retardant and insulated low-voltage power cable and a preparation method and application thereof. The flame-retardant and insulating low-voltage power cable comprises the inner core layer, the filler layer, the belting layer, the lining layer, the metal armor layer and the outer sheath layer from inside to outside, and the multiple layers can effectively protect the inner core and endow the cable with better performance; in addition, low-density polyethylene, a furan modified polyethylene compatilizer, a reactive flame retardant, bismaleimide, dicumyl peroxide and an auxiliary are adopted to obtain the cross-linked polyethylene material for the cable outer sheath, and the cross-linked polyethylene material has excellent insulation, flame retardance, strength, toughness and repairing performance.

The invention relates to the technical field of cable materials, in particular to a flame-retardant efficient cross-linked polyolefin cable body and a preparation method thereof. The cable body comprises a polyolefin matrix, 2, 4-dihydroxy-6-methyl benzamide, an intumescent flame retardant, dicumyl peroxide, an antioxidant, a light stabilizer and a lubricant, wherein the polyolefin matrix is subjected to synergistic modification by phosphorus-nitrogen heterocyclic silane-plasma. The preparation method of the polyolefin matrix synergistically modified by phosphorus-nitrogen heterocyclic silane-plasma comprises the following steps: performing grafting reaction on polyolefin resin and phosphorus-nitrogen heterocyclic silane under the action of an initiator, and performing plasma surface treatment to endow the material with dual active sites. The preparation method comprises the following steps: melting and granulating a polyolefin matrix subjected to phosphorus-nitrogen heterocyclic silane-plasma synergistic modification, small organic molecules and auxiliaries, and performing extrusion molding under a crosslinking condition to obtain a cable body. The material disclosed by the invention has comprehensive advantages in flame-retardant efficiency, crosslinking degree and mechanical property, and is suitable for manufacturing high-safety power cables.

The invention provides a preparation method of a novel cable sheath layer. The novel cable sheath layer comprises silicone rubber, a heat-conducting insulating material, a flame-retardant material, white carbon black, a silane coupling agent, dicumyl peroxide, silicone oil, an antioxidant, a light stabilizer and the like. The preparation method comprises the following steps: firstly, modifying a heat-conducting insulating material and a flame-retardant material to improve the dispersity and interfacial compatibility, and then uniformly dispersing filler in a silicone rubber matrix through banburying, open milling and vulcanization processes to finally form a high-performance cable sheath layer. Nanometer spherical aluminum oxide grafted hexagonal boron nitride is used as a heat-conducting insulating material, so that the heat conductivity of the sheath layer is remarkably improved, and excellent electrical insulation performance is kept. Besides, modified magnesium-rich silicate is used as a flame-retardant material, so that the cable has an excellent flame-retardant effect, and an antioxidant and a light stabilizer are combined, so that the weather resistance and the aging resistance of the sheath layer are improved. The prepared cable sheath layer is suitable for the fields of high-voltage cables, 5G communication, power transmission, aerospace, military use, rail transit and the like, and has a good application prospect.

The invention discloses a wear-resistant composite rubber packing sealing material for an oil pumping unit and a preparation method, and the sealing material is prepared from the following raw materials in parts by weight: a main body rubber material, which comprises 70-90 parts by weight of nitrile rubber and 10-30 parts by weight of polyurethane rubber, based on the total weight of 100 parts; 3-5 parts of zinc oxide; 2-3 parts of stearic acid; 30 to 60 parts of carbon black; 5 to 15 parts of graphite; 20-40 parts of an inorganic nano wear-resistant filler; 3-6 parts of an active agent; 5-10 parts of a softening agent; 2-3 parts of an anti-aging agent; 2-6 parts of an effective vulcanization cross-linking agent and 2-5 parts of a peroxide cross-linking agent; wherein the effective vulcanization cross-linking agent is a mixture of an accelerant and sulfur, and the peroxide cross-linking agent is dicumyl peroxide. According to the wear-resistant composite rubber packing sealing material for the oil pumping unit provided by the invention, by balancing the tensile strength, tearing strength, oil resistance and wear resistance of the material, the comprehensive performance of the material is remarkably improved, and the service life of the material is prolonged.

The invention discloses a flame-retardant flat flexible high-current cable and a preparation method thereof, and relates to the technical field of cables. The cable comprises a flat conductor, an insulating layer, a shielding layer, a reinforcing layer and a sheath layer, the insulating layer contains 85-90 parts of low-density polyethylene, 1.2-1.5 parts of dicumyl peroxide, 12-15 parts of modified aluminum hydroxide and the like; and the sheath layer contains 42-50 parts of modified chlorinated polyethylene, 28-34 parts of modified aluminum hydroxide and the like. The modified chlorinated polyethylene is prepared through a three-step extrusion reaction, and the modified aluminum hydroxide is subjected to coupling agent treatment, coating modification and carbon nanotube composite modification. The flame-retardant flat flexible large-current cable has prominent advantages, an efficient flame-retardant system is constructed by modified aluminum hydroxide and antimony trioxide, and the V-0 level requirement of UL94 can be met; the flat structure is combined with the modified chlorinated polyethylene, so that the flexibility is excellent and the temperature-resistant range is wide. The design of the insulating layer and the shielding layer ensures excellent electrical performance, segmented temperature control and accurate parameter regulation and control are performed in preparation, stable product quality is ensured, and the device can adapt to a large-current application scene.

The invention relates to the technical field of cables, in particular to a high-flexibility ethylene-propylene insulating rubber material for a charging pile cable and a preparation process. The composite material comprises an ethylene propylene diene monomer, a thermoplastic polyolefin elastomer, an ethylene-butylene copolymer, nanoscale magnesium hydroxide, a silane coupling agent, dicumyl peroxide, a hindered phenol antioxidant and a phosphite antioxidant. The ethylene propylene diene monomer and the ethylene-butylene copolymer form a flexible network skeleton, and the ethylene-butylene copolymer and the thermoplastic polyolefin elastomer are subjected to molecular-level blending, so that the elongation at break and the bending fatigue resistance are improved; silane coupling agent modified nano magnesium hydroxide is chemically bonded with a rubber matrix, so that the flame retardance and thermal aging resistance are enhanced, and the negative influence of filler agglomeration on flexibility is reduced; the compound antioxidant system effectively inhibits thermal oxidation degradation at high temperature, avoids insulation failure, realizes collaborative optimization of high flexibility and high heat resistance, and improves the reliability and applicability of the charging pile cable.

The invention relates to the technical field of cables, and provides a corrosion-resistant insulated power cable. The corrosion-resistant insulated power cable is sequentially provided with a conductor layer, an insulating layer and a sheath layer from inside to outside, and the insulating layer is prepared from the following raw materials in parts by weight: low-density polyethylene, magnesium hydroxide and calcium carbonate composite powder, an antioxidant, dicumyl peroxide, zinc stearate and polyethylene wax; the sheath layer comprises the following raw materials in parts by weight: PVC resin, magnesium hydroxide and calcium carbonate composite powder, diisononyl phthalate, a calcium-zinc composite stabilizer, an antioxidant, polyethylene wax and calcium stearate. According to the corrosion-resistant insulated power cable prepared in the invention, the corrosion resistance of the power cable in extreme corrosion environments such as strong acid, strong alkali, high-concentration salt mist and the like is improved, and the condition that a common cable sheath is easy to expand and crack in the extreme corrosion environments is improved.

The invention provides a bacteriostatic and scale-inhibiting PE material and a preparation method thereof, and belongs to the technical field of high polymer materials, the preparation method comprises the following preparation steps: dissolving polyethylene in xylene, dissolving, adding perfluorohexylethylene and dicumyl peroxide, reacting, precipitating, washing, and drying to obtain perfluoro modified PE; the preparation method comprises the following steps: dissolving four-arm polyethylene glycol amine in a PBS buffer solution, adding 4-carboxyphenylboronic acid, EDC.HCl and NHS, carrying out a stirring reaction in a dark place, carrying out ultrafiltration and freeze drying to obtain PBA-PEG, dissolving the PBA-PEG in a Tris-HCl buffer solution, adding dopamine hydrochloride, and carrying out mixing, oxidation reaction, dialysis purification and drying to obtain a PBA-DA-PEG compound; the preparation method comprises the following steps: pre-mixing perfluorinated modified PE, mixing with an antioxidant and a compatibilizer, injecting the PBA-DA-PEG compound, continuously mixing, extruding, and carrying out water-cooling pelletizing to obtain the antibacterial and scale-inhibiting PE material. According to the PE material obtained by the invention, the antibacterial performance and the scale inhibition performance of the material can be improved at the same time.

The invention discloses a bio-based TPV composite material and a preparation method thereof, and belongs to the technical field of preparation of TPV composite materials, polylactic acid is used as a plastic phase, bio-based itaconate rubber and a bio-based ethylene-vinyl acetate copolymer are used as a rubber phase, maleic anhydride grafted cardanol and an ethylene-acrylic acid copolymer are used as a composite compatibilizer, and the bio-based TPV composite material is prepared. Titanate coupling agent modified core-shell particles are added to serve as a reinforcing agent, dicumyl peroxide is combined with an electron beam radiation initiation mode, and the bio-based PLA / Bio-ItBR / EVA TPV is prepared through a dynamic vulcanization process. The product has medium hardness, medium tensile strength, excellent ductility and high elasticity, and good elastic memory ability and compressive deformation resistance. The compatibility between a plastic phase and a rubber phase is improved, and the phase separation problem caused by polarity difference is reduced. The dicumyl peroxide is combined with a dynamic vulcanization process initiated by electron beam radiation, so that a uniform cross-linked network can be formed, and the stability of the material performance is improved.

The invention relates to the technical field of cables, and provides a high-temperature-resistant power cable. The high-temperature-resistant power cable comprises a conductor and a high-temperature-resistant outer sheath, the high-temperature-resistant outer sheath is prepared from the following raw materials in parts by weight: 80 to 90 parts of linear low-density polyethylene, 10 to 15 parts of ethylene-vinyl acetate copolymer, 20 to 25 parts of polyurethane grafted aluminum borate whisker, 12 to 15 parts of polyolefin elastomer, 0.5 to 1 part of antioxidant, 0.8 to 1 part of dicumyl peroxide, 1.0 to 1.2 parts of crosslinking aid TAIC, 0.3 to 0.8 part of stabilizer, 0.5 to 1 part of calcium stearate and 0.2 to 0.5 part of polyethylene wax. According to the cable prepared in the invention, the stability of the interlayer structure of the high-temperature-resistant power cable during long-term high-temperature operation is improved, and the anti-degradation performance of the material of the high-temperature-resistant power cable in a long-term high-temperature environment is improved.

The invention relates to the technical field of cables, and provides a high-weather-resistance power cable. The high-weather-resistant power cable comprises a cable core and an outer sheath, the outer sheath is prepared from the following raw materials in parts by weight: 40 to 50 parts of low-density polyethylene, 25 to 35 parts of ethylene-vinyl acetate copolymer, 20 to 30 parts of ethylene propylene diene monomer, 10 to 12 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer, 16 to 20 parts of ZrO2 coated modified hydrotalcite, 15 to 20 parts of magnesium hydroxide, 4 to 6 parts of silane coupling agent, 2 to 3 parts of dicumyl peroxide and 3 to 5 parts of zinc oxide; 6 to 10 parts of conductive carbon black, 0.8 to 1 part of antioxidant and 1 to 1.5 parts of zinc stearate. According to the cable prepared in the invention, the protection performance, the service life and the safety of an existing high-weather-resistance power cable under extreme weather conditions are improved, and the mechanical property of the cable is also improved.

The invention discloses a high-elastic material for an anti-slip sole and a preparation method of the high-elastic material in the field of high polymer materials. The high-elastic material is prepared from the following raw materials: modified polyurethane, modified silicone rubber, calcium carbonate, dicumyl peroxide, 2-mercaptobenzothiazole, N-isopropyl-N '-phenyl p-phenylenediamine and naphthenic oil. Wherein the modified polyurethane is prepared by the following steps: carrying out vacuum dehydration on polybutylene adipate, reacting with toluene diisocynate to prepare an isocyanate-terminated prepolymer, adding dimethylolpropionic acid, triethylamine and deionized water to obtain a water-based dispersion, and carrying out graft copolymerization on the water-based dispersion, methyl methacrylate and the like; the preparation method comprises the following steps: preheating modified polyurethane, mixing with modified silicone rubber at a high speed, adding calcium carbonate and naphthenic oil, carrying out double-roller open milling and thin-passing, adding a vulcanizing agent and the like, carrying out overturning milling, and carrying out flat plate vulcanization molding. The material is used for anti-skid soles, and has the advantages of high elasticity, lasting skid resistance and excellent weather resistance.

The invention discloses a method for manufacturing a polyamide-imide high-heat-resistance enameled wire for a new energy automobile, and the method comprises the following steps: 1), carrying out the surface treatment of a conductor, and improving the surface roughness; 2) preparing insulating paint liquid; (3) coating the insulating paint liquid obtained in the step (2) on the surface of the conductor obtained in the step (1) for multiple times; and 4) carrying out sectional stretching treatment to finally obtain the polyamide-imide high-heat-resistance enameled wire. The polyamide-imide resin, the solvent, the epoxy modifier, the nano composite powder, the silane coupling agent and the dicumyl peroxide are compounded to prepare the insulating paint liquid, and the insulating paint liquid is coated on the conductor for multiple times, so that a compact layer can be formed on the conductor, and the insulating paint liquid has the advantages of high heat resistance, high thermal stability, high mechanical property and the like; the extreme requirements of the new energy automobile driving motor on high temperature resistance, high-frequency pulse voltage resistance and refrigerant corrosion resistance of the enameled wire are met, the manufacturing steps are simple, and the enameled wire is suitable for industrial popularization and application.

The invention discloses a high-temperature-resistant poly (4-methyl-1-pentene) dielectric film with synergistically improved insulating strength and dielectric property and a preparation method and application thereof, and belongs to the field of preparation processes of polymer energy storage dielectric materials. The invention aims to solve the problems that the existing polymer energy storage material is low in energy storage density at high temperature, and the dielectric property and the insulating strength cannot be improved at the same time. The invention provides a method for preparing a norbornene dianhydride grafted poly (4-methyl-1-pentene) film by a two-step method by using poly (4-methyl-1-pentene) particles, norbornene dianhydride and dicumyl peroxide and combining a solution suspension technology with a melt casting extrusion technology and a one-way stretching traction technology. The high-temperature-resistant poly (4-methyl-1-pentene)-based dielectric film prepared by the invention has excellent breakdown strength and dielectric property, and the discharge energy density is as high as 5.92 J / cm < 3 > when the charge-discharge efficiency is greater than or equal to 90% at 150 DEG C.

The invention relates to the field of tires, and provides a degradable material reinforced environment-friendly tire, which comprises a tire main body, the tire main body at least comprises a tread, a sidewall, a cord fabric layer and a tire bead, the tread contains a degradable rubber material, and the degradable rubber material accounts for 20-50% of the total mass of the tread; the degradable rubber material contains polycaprolactone modified natural rubber accounting for 10%-30% of the total mass and is prepared by adopting a dynamic vulcanization process, dicumyl peroxide serves as a vulcanizing agent, the addition amount of dicumyl peroxide is 0.5%-1.5%, the vulcanization temperature is 140-160 DEG C, the vulcanization time is 8-15 minutes, and the number-average molecular weight of polycaprolactone is 10000-30000. The environment-friendly tire provided by the invention can be gradually decomposed in the natural environment, so that the pollution of the waste tire to the environment is effectively reduced, the problem that the traditional tire is difficult to degrade is solved, and the occupation of land resources and the risk of environmental pollution are greatly reduced.

The invention provides a heat-conducting water-blocking sealant, a preparation method thereof and a photovoltaic module. The heat-conducting and water-blocking sealant is prepared from the following raw materials in parts by mass: 50 to 100 parts of methyl vinyl siloxane, 50 to 100 parts of lignin, 10 to 50 parts of diamond particles and / or diamond alloy particles, 0.5 to 10 parts of a first cross-linking agent, 0.5 to 10 parts of a second cross-linking agent, 0.5 to 5 parts of a coupling agent and 0.05 to 1 part of a catalyst, wherein the first cross-linking agent is prepared from one or more of dicumyl peroxide, benzoyl peroxide, toluene diisocynate and hexamethylene diisocyanate; the second cross-linking agent comprises polymethylhydrosiloxane. The heat-conducting and water-blocking sealant disclosed by the invention has relatively good heat-conducting property, water-blocking property and electrical insulation property.

The invention relates to the technical field of tread rubber, and discloses high-performance tire tread rubber based on a synergistic system and a preparation method thereof.The method comprises the following steps of first-stage mixing, second-stage mixing, third-stage mixing, final mixing and vulcanization molding. By adopting a composite vulcanization system composed of dicumyl peroxide and sulfur and cooperating with zinc methacrylate as a functional auxiliary agent, a dual synergistic cross-linked structure composed of a free radical cross-linked network and an ionic cross-linked network is formed in the vulcanization process, so that the uniformity and stability of the cross-linked network structure of the tread rubber can be effectively improved, and the service life of the tread rubber is prolonged. The reasonable regulation and control of the crosslinking density of the tread rubber in the vulcanization process are ensured, the problem that a traditional single vulcanization system cannot give consideration to the wear resistance and the dynamic heat generation performance is solved, the comprehensive mechanical property and the dynamic use performance of the tread rubber are further improved, and firm chemical combination between the reinforcing filler and rubber molecules is ensured.

The invention relates to the technical field of foaming materials, in particular to a high-damping EVA / EPDM composite foaming material and a preparation method thereof. The high-damping EVA / EPDM composite foam material is prepared from the following raw materials in parts by weight: 150 to 80 parts of ethylene-vinyl acetate copolymer, 20 to 50 parts of ethylene propylene diene monomer, 3 to 5 parts of azodicarbonamide, 1 to 3 parts of dicumyl peroxide, 10 to 12 parts of compound filler, 6 to 10 parts of maleic anhydride grafted ethylene-octylene copolymer, 2 to 4 parts of hydroxyl-terminated polybutadiene and 1 to 4 parts of triallyl isocyanurate, the compound filler is formed by compounding silicon dioxide microspheres, graphene aerogel microspheres and modified barium titanate nanoparticles according to the mass ratio of 1: (1.5-1.7): (1.5-1.8); the high-damping EVA / EPDM composite foam material prepared by the invention not only has better high-damping and low-resilience properties, but also has excellent tensile strength, and the quality of the high-damping EVA / EPDM composite foam material is effectively ensured.

The application relates to the field of photovoltaic packaging adhesive films, and discloses a preparation method of a high-crosslinking-degree POE packaging adhesive film and a photovoltaic module. The preparation method comprises the following steps: mixing an ethylene-alpha olefin copolymer and an initiator, and reacting at a temperature higher than an initiation temperature of the initiator to obtain a modified polyolefin resin; the initiator is at least one of dicumyl peroxide, methyl ethyl ketone peroxide and di-tert-butyl peroxide; raw materials including the modified polyolefin resin, a crosslinking agent and a crosslinking aid are taken; the crosslinking agent is at least one of tert-amyl peroxy(2-ethylhexyl) carbonate, dicyclohexyl peroxydicarbonate and azobis isobutyronitrile; and all the raw materials are blended and extruded at a temperature higher than an initiation temperature of the crosslinking agent and not higher than 110 DEG C to be shaped. By using the preparation method, the POE packaging adhesive film has high crosslinking degree and crosslinking speed, good PID resistance and long-term stability, and is also endowed with high light transmittance and low haze.

The invention relates to the technical field of high polymer materials, in particular to a preparation method of a high-temperature-resistant easy-to-tear PVC (polyvinyl chloride) cable material and a product thereof, and the preparation method comprises the following steps: mixing diatomite and mica according to a mass ratio, introducing a silane coupling agent into a reaction kettle after mixing, heating, adding a reactive compatilizer, and reacting to obtain a dual modified filler; mixing magnesium hydroxide with phytic acid, grinding, and drying to obtain phytic acid coated modified magnesium hydroxide; the preparation method comprises the following steps: adding pvc resin and other auxiliaries into an internal mixer, heating, and then adding dicumyl peroxide to obtain a premix with a sea-island structure; dividing the premix into an inner layer and an outer layer, adding nano montmorillonite and modified magnesium hydroxide into the inner layer, adding double modified filler into the outer layer, cooling, cutting and granulating to obtain the high-temperature-resistant easy-to-tear PVC cable material. The prepared high-temperature-resistant easy-to-tear PVC cable material can form a weak interface layer when the material is subjected to mechanical action, controllable tearing is achieved, and the environment-friendly and flame-retardant effects are achieved by adding the green flame retardant.

The invention relates to the technical field of conductive shielding materials, in particular to a composite conductive shielding material based on conductive carbon black and a preparation method of the composite conductive shielding material. 69 to 77 parts of matrix resin; 1.2 to 1.5 parts of a plasticizer; 2.2 to 2.7 parts of a dispersant; 0.6 to 0.8 part of an antioxidant; 0.6 to 0.8 part of a lubricant; 0.35 to 0.47 part of eugenol; 0.72 to 0.8 part of dicumyl peroxide; the preparation method comprises the following steps: carrying out melt blending on matrix resin, conductive carbon black and other auxiliary agents, adding eugenol and dicumyl peroxide, carrying out blending, and carrying out hot press molding and drying to obtain the composite conductive shielding material. The carbon black A, the carbon black B and the carbon black C are compounded, so that the obtained conductive carbon black is high in conductivity and dispersity and has a certain reinforcing property, the mechanical property of the composite conductive shielding material can be effectively improved, and the composite conductive shielding material has a wide application prospect.

The invention discloses a preparation process of halogenated butyl rubber for improving high temperature resistance of a tire. According to the invention, the high temperature resistance is obviously improved through multi-scale filler cooperation and interface strengthening. The pre-modification treatment of nano aluminum oxide and a silane coupling agent Si69 is combined with a segmented temperature control process in an internal mixing stage, so that nano particles are uniformly dispersed in a rubber matrix, an efficient heat-conducting network is formed, and the dynamic heat generation is reduced by 20% or above; a compound filling system of a modified montmorillonite organic intercalation and carbon black N660 inhibits oxygen permeation by using a lamellar barrier effect, and is matched with the free radical capture capability of nano cerium oxide CeO2, so that the tensile strength retention rate of the rubber material is increased to 90% after the rubber material is thermally aged for 96 hours at the high temperature of 150 DEG C. Meanwhile, due to the gradient vulcanization design of the microencapsulated sulfur and the dicumyl peroxide DCP, a C-C bond and C-S bond coexisting dual cross-linked network is constructed in the dynamic vulcanization stage, the high-temperature compression permanent deformation is reduced by 35%, and the service life of the tire under the extreme working condition is remarkably prolonged.

The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 100-120 parts of PE master batch, 20-25 parts of a modified additive, 10-15 parts of a modified filler and 0.5-0.8 part of dicumyl peroxide, carrying out melt extrusion and film blowing to prepare a pretreated film, carrying out corona treatment on the pretreated film, and treating the pretreated film with trimethoxy (3, 3, 3-trifluoropropyl) silane to prepare the corrosion-resistant PE film material. In the melt extrusion process of the raw materials, under the action of dicumyl peroxide, double bonds on the modified additive and the modified filler are grafted with PE molecular chains so as to form cross-linked grids, a physical group layer can be formed by adding the modified filler, and dense latticed organic silicon chain segments can be formed among molecules by adding the modified additive, so that the cross-linked grids are formed. And trimethoxy (3, 3, 3-trifluoropropyl) silane forms a fluorine-containing organic silicon protective layer on the surface, so that the corrosion-resistant effect of the material is greatly improved.

The invention belongs to the technical field of high polymer materials, and particularly relates to a water-resistant flame-retardant cable material as well as a preparation method and application thereof. The water-resistant flame-retardant cable material is prepared from the following components in parts by weight: 70 to 100 parts of polyolefin resin, 100 to 180 parts of a halogen-free flame retardant, 0.5 to 1.8 parts of a silane coupling agent, 0.05 to 0.2 part of dicumyl peroxide, 0.5 to 3 parts of a lubricating agent and 0.3 to 1 part of an antioxidant, the polyolefin resin is a blend of polyethylene, an ethylene-vinyl acetate copolymer, maleic anhydride grafted polyolefin and a polyolefin elastomer. The cable material prepared by the invention not only ensures excellent flame retardance and physical and mechanical properties, but also has excellent water resistance, and the change rate of strength elongation after soaking in water at 70 DEG C for 168 hours is not greater than + / -30%. Wherein the change rate of the tensile strength is as low as 15.67% and is basically not more than 20%; and the change rate of the elongation at break is basically not more than 18% and even can be as low as 10.56%.