2914 results about "Dicumyl peroxide" patented technology

The invention discloses a cold-resistant rubber cable sheath material and a preparation method. The material comprises chlorinated polyethylene, ethylene-propylene-diene monomer (EPDM) rubber, lead oxide, calcium carbonate, N-isopropyl benzene-N'-phenyl p-phenylenediamine serving as an anti-aging agent, antimonous oxide, magnesium oxide, paraffin hydrocarbon oil, chlorinated paraffin, paraffin, carbon black, settled white carbon black, talc powder, gamma-aminopropyl triethoxysilane serving as a surfactant, dicumyl peroxide serving as a vulcanizing agent and triallyl isocyanurate serving as a co-vulcanizing agent. The low temperature performance of the material is improved by blending the chlorinated polyethylene and the EPDM rubber, and meanwhile, the flame-retardant performance of the rubber sheath material is improved by synergy of the antimonous oxide serving as a flame retardant and the chlorinated paraffin; experiments show that the rubber sheath material can pass low-temperature embrittlement test of 40 DEG C below zero, has excellent low-temperature resistance, has the oxygen index of more than 32 and has good flame-retardant performance; and the preparation method is simple and strong in operability.

Disclosed is a method for preparing an ethylene vinyl acetate (EVA)/ thermoplastic urethane (TPU)/ polyolefin elastomer (POE) composite foaming material. The method includes fully and evenly mixing EVA, POE, EVA grafted maleic anhydride and TPU in an internal mixer, adding azodicarbonamide serving as a foaming agent, dicumyl peroxide serving as a cross-linking agent, an auxiliary foaming agent and talcum powders to the internal mixer for mixing to obtain a mixture, pressing the mixture on an open dual-roller mixing mill into sheets, feeding the sheets to a vulcanizing machine, and performing mould pressing, crosslinking and foaming forming to discharge the sheets to obtain the EVA/TPU/POE composite foaming material. By means of EVA-maleic anhydride (MA), the EVA/TPU composite material with good compatibility can be obtained, usage of 4, 4-diaminodiphenylmethane is avoided, the process is simple, costs are saved, and better performances are achieved; and simultaneously, a POE material is introduced to a system, so that important performance indexes of the prepared foaming material are well improved.

The invention discloses a thermoplastic low-smoke halogen-free flame-retardant environment-friendly sheath material for power cables and a preparation method thereof. The thermoplastic low-smoke halogen-free flame-retardant environment-friendly sheath material for power cables comprises the following components in parts by weight: 60-80 parts of EVA (ethylene-vinyl acetate), 20-30 parts of HDPE (high-density polyethylene), 10-15 parts of EPDM (ethylene-propylene-diene monomer), 15-25 parts of compatiblizing agent, 100-150 parts of halogen-free flame retardant, 0.5-1 part of antioxidant 1035, 0.5-1 part of antioxidant DSTP, 1-2 parts of ethylene bis stearamide, 3-5 parts of DCP (dicumyl peroxide), 2-4 parts of zinc oxide, 1-2 parts of calcium stearate, 10-20 parts of dimethyl methyl phosphonate, 30-40 parts of nano kaolin, 2-3 parts of stearic acid and 0.5-1 part of isopropyl tri(dioctylpyrophosphate)titanate. The sheath material disclosed by the invention has the advantages of excellent physical and mechanical properties, excellent flame retardancy, favorable high/low temperature resistance, favorable oil resistance, favorable solvent resistance, favorable wear resistance, favorable ozone resistance, favorable aging resistance, high flexibility, crack resistance and the like, is very durable, environment-friendly and pollution-free, and can completely satisfy the requirements for modern power cables.

The invention relates to a pair of soles and particularly relates to a pair of soles of ejection foamed rubber-plastic sports shoes and a manufacturing method of the soles. The pair of soles of the ejection foamed rubber-plastic sports shoes consists of the following raw materials: an ethylene-vinyl acetate copolymer, an ethylene-octene copolymer, a hydrogenated styrene-butadiene-styrene block copolymer, an ethylene propylene diene monomer, polysiloxane resin, talcum powder, stearic acid, zinc stearate, zinc oxide, dicumyl peroxide, azobisformamide and masterbatch. The manufacturing method comprises the steps of: mixing the dicumyl peroxide and an azo foaming agent for later use, mixing other raw materials and then pouring into an internal mixer for first-stage internal mixing, then adding a mixture of the dicumyl peroxide and the azo foaming agent for second-stage internal mixing to obtain an internally mixed mixture, thinning the mixture on a roller machine, conveying the material which is evenly mixed by the roller machine into a granulator for granulation, proportioning aggregates after granulation according to set ratios, injecting the aggregates into a shoe mould by using an injection molding machine for molding, and sizing the molded soles into foamed profile products by using an incubator.

The invention provides a rubber sealing ring and a production method thereof. The rubber sealing ring is prepared from the following components of (by weight parts): ethylene propylene diene monomer (EPDM) 80-120, carbon black 55-75, paraffin oil 15-25, indirect process zinc oxide 4-6, stearic acid 0.2-1, anti-aging agent 2-4, sulfur S-80 0.1-0.35, vulcanizing agent dicumyl peroxide (DCP) 3-5, and lubricating agent 1-3. The production method comprises the steps of: synthesizing rubber with a Banbury mixer, forming the synthetic rubber with a mixing mill, first-stage vulcanizing in a mold of a vulcanizing device, second-stage the product from the first-stage vulcanization in an oven, trimming, testing, and storing. The inventive rubber sealing ring has improved tensile strength, extensibility, tear strength, self-lubrication effect, compression and deformation resistance, heat resistance and aging resistance, good medium resistance, and prolonged service life. The inventive production method is simple and reasonable.

The invention discloses a valve sealing gasket sizing material, which is prepared from the following raw materials in parts by weight: 20-30 parts of fluorosilicone rubber, 50-60 parts of hydrogenated nitrile-butadiene rubber, 15-25 parts of chlorosulfonated polyethylene rubber TS-320 (TOSOH, Japan), 2-3 parts of gamma-methacryloxypropyltrimethoxysilane, 1-2 parts of diphenyl silandiol, 14-16 parts of modified tree ash, 2-3 parts of ferrocene, 0.2-0.6 part of dicumyl peroxide (DCP), 20-30 parts of high-abrasion resistant carbon black N330, 20-25 parts of precipitated white carbon black, 5-7 parts of light calcium carbonate, 2-4 parts of zinc oxide, 1-3 parts of calcium stearate, 1-3 parts of aluminium oxide, 5-8 parts of dolomite, 13-15 parts of modified iron tailing powder, 0.1-0.3 part of accelerating agent MBTS, 1-2 parts of sulphur, 1-2 parts of anti-aging agent RD, 1-2 parts of anti-aging agent MB, 1-2 parts of benzimidazole-2-thiol, 1-3 parts of methyltrimethoxy silane, and 2-3 parts of paraffin. The sizing material of the rubber has excellent high and low temperature-resistant, oil-proof, solvent-resistant and chemical-resistant performance, and at the same time is good in mechanical property and low in cost.

The invention relates to an environment-friendly rubber plastic heat-insulating material and its preparation method, and the rubber plastic heat-insulating material is prepared from butyronitrile rubber (NBR), antimonous oxide (Sb2O3), zinc oxide, sulfur, dioctyl-phthalate (DOP), epoxidized soybean oil (ADDA), mercaptobenzothiazole (M), anti-aging agent (4020), antioxidant (AST-500), protective wax (HGB-3), ethylene-vinyl acetate copolymer (EVA), dicumyl peroxide (DCP crosslinking agent), polyethylene glycol (PEG), stearic acid, aluminum hydroxide, foaming agent-dinitrosopentamethylene tetraamine (H), diphenylguanidine (D), pigment, anti-aging agent (RD), anti scorching agent (PVI), and the like. By limited use of raw materials containing chlorine ion components and cooperation of a new vulcanization foaming technology, environment-friendly and heat-insulating performances of the product can be stabilized, the prepared environment-friendly rubber plastic heat-insulating material has no corrosion performance in use, the material life is prolonged, metal pipes in refrigeration equipment can be effectively protected, and maximized performance of the product can be performed.

The invention provides a silicon rubber cross-linked flame-retardant cable material. The cable material is prepared from the following raw materials, by weight, 100 parts of silicon rubber, 20-30 parts of ethylene propylene diene monomer, 8-10 parts of chlorinated polyethylene, 15-20 parts of acetylene black, 0.5-1.0 part of dimethyl silicone oil, 0.2-0.5 parts of dicumyl peroxide (DCP), 20-30 parts of high-density polyethylene, 15-25 parts of calcium silicate, 0.5-1.0 part of modified argil, 30-40 parts of precipitated silica, 1-3 parts of a silane coupling agent, 0.2-0.5 parts of an antioxidant 4040, 0.5-1.5 parts of a promoter TMTD, 0.2-0.5 parts of a vulcanizing agent BP, 2-4 parts of tribasic lead sulfate, 12-15 parts of antimony (III) oxide, and 6-8 parts of zinc borate. The cable material has the advantages of excellent flame retardation, very less smoke in combustion, no generation of toxic gases or corrosive gases, good high and low temperature resistances, good corrosion resistance, good water resistance, good ozone resistance, and good ageing resistance.

A disclosed oil-resistant cold-resistant ultraviolet-proofpolyvinyl chloride/nitrile rubber composite cable material is prepared from the following raw materials in parts by weight: 60-80 parts of SG-2 type polyethylene, 20-30 parts of POE, 30-50 parts of nitrile rubber, 15-20 parts of fluorubber, 10-15 parts of dioctyl phthalate, 5-10 parts of di(butylcarbitol)adipate, 0.5-1 part of dicumyl peroxide, 2-3 parts of triallyl isocyanurate, 1-2 parts of 2-mercaptobenzimidazole, 4-8 parts of titanium dioxide, 5-10 parts of paraffin oil, 2-3 parts of zinc oxide, 4-8 parts of microcrystalline paraffin and the like. The cable materials of the invention ahs excellent thermoset rubber apparence and thermoplastic elastomer characteristics, and good mechanical properties and low-temperature flexibility; the long-term suitable operation temperature is -40 DEG C to 105 DEG C; the cable material is capable of retarding flame, resisting oil, resisting acid and base, resisting wear, resisting weather, resisting ozone, resisting thermal aging and resisting ultraviolet ray, and is applicable as high-oil-resistance weatherable cable sheath materials.

The invention discloses a super wear-resistant rubber foamed sport shoe material comprising the components of ethylene-vinyl acetate copolymer, plastic styrene-butadiene rubber (TVA), ethylene propylene diene monomer (EPDM), hydrogenated styrene-butadiene-styrene block copolymer (SEBS), a wear-resistant agent, talc powder, stearic acid, zinc stearate, zinc oxide, dicumyl peroxide (DCP) and azodicarbonamide. The invention also discloses a preparation method of the super wear-resistant rubber foamed sport shoe material. The super wear-resistant rubber foamed sport shoe material disclosed by the invention is good in slip resistance, the wear resistance of the sport shoe material is superior to that of common hard rubber, and the sport shoe material can be directly molded by ejecting. The invention also discloses a preparation method of the super wear-resistant rubber foamed sport shoe material, wherein physical parameters are strictly controlled during preparation to ensure that the prepared super wear-resistant rubber foamed sport shoe material has more excellent wear resistance and slip resistance.

Disclosed are composite flame-retardant expandable polystyrene particles and a preparation technology thereof. The particles are prepared from the following components of: by weight, 100 parts of styrene monomer, 100-150 parts of water, 1-10 parts of expandable graphite, 1-12 parts of a phosphorus compound, 0.1-0.5 part of white oil, 0.1-0.5 part of polyethylene wax, 0.05-0.2 part of dicumyl peroxide, 0.2-0.8 part of benzoyl peroxide, 0.1-0.4 part of polyvinyl alcohol, 1.1-2.1 parts of tricalcium phosphate and 8-12 parts of pentane. By the addition of a composite fire retardant of expandable graphite and the phosphorus compound before polymerization of styrene, adverse influence of the fire retardant on performance of the product is reduced; expandable graphite and the phosphorus compound are halogen-free fire retardants, the particles have good environmental protection performance; by the addition of white oil, the particles have plasticising and internal lubricant functions as well as good stability and low volatility, and fluidity during the forming of polystyrene particles can be greatly improved; polyvinyl alcohol and tricalcium phosphate are dispersion stabilizers and by timely adding a proper amount of the dispersion stabilizers, the product appearance can be improved, the production efficiency can be raised, and cost can be reduced; and the addition of all the components guarantees the performance of the product.

The invention provides an anti-tear EVA (ethylene-vinyl acetate copolymer) foaming shoe material and a preparation method thereof, belonging to a casual shoe sole. The anti-tear EVA foaming shoe material comprises the following raw materials: EVA, ethylene-octene copolymer, hydrogenated styrene-butadiene-styrene block copolymer, ethylene-acrylic acid copolymer, talcum powder, stearic acid, zinc stearate, zinc oxide, dicumyl peroxide, azobisformamide and color masterbatch. The preparation method comprises the following steps of: mixing dicumyl peroxide with the azo foaming agent for later use, mixing the rest raw materials, then pouring the mixture into an internal mixer to carry out first-stage internal mixing and then adding the mixture of dicumyl peroxide and the azo foaming agent to carry out second-stage internal mixing to obtain an internally mixed mixture; thinning the obtained internally mixed mixture on a roller machine; transferring the material uniformly mixed by the roller machine to a granulator to be granulated; mixing the granules after granulation according to a set multiplying power and injecting the mixture into a shoe mold via an injection molding machine to be molded; and sizing the molded sole into a foaming profile finished product via a thermostat.

The invention discloses a halogen-free environmentally-friendly power cable material for wind power generation, and its preparation method. The cable material comprises the following raw materials, by weight, 90-110 parts of a polyolefin elastomer (POE) 8450/American DuPont, 50-60 parts of PVC resin powder, 40-60 parts of wollastonite powder, 60-80 parts of nanometer attapulgite, 50-80 parts of ethylene-propylene-diene terpolymer rubber, 40-50 parts of nitrile butadiene rubber, 20-30 parts of nanometer pottery clay, 30-40 parts of aluminum hydroxide, 1-4 parts of precipitated white carbon black, 60-80 parts of light calcium carbonate, 3-5 parts of insoluble sulfur, 1-4 parts of triallyl isocyanurate, 3-5 parts of an antiager TPPD, 4-6 parts of dicumyl peroxide (DCP), 3-8 parts of dibasic lead phosphite, 5-7 parts of an antioxidant 1010, 2-5 parts of monoglycerin stearate and 50-70 parts of antimony trioxide. The cable material has the advantages of simple preparation method, excellent electrical property, good heat, ageing and wear resistances, small swelling deformation at a high temperature, secondary vulcanizing processing benefiting, low smoke and fire resistance, and environmental protection and safety.

The invention relates to a semiconductive silicon rubber shielding material for a radiation-resistant cable, and a preparation method of the material, belonging to the technical field of cable shielding material. The semiconductive silicon rubber shielding material comprises the raw material components in parts by weight: 100 parts of silicon rubber, 20-40 parts of conductive carbon black, 40-50 parts of white carbon black, 1.0-2.5 parts of dicumyl peroxide, 2.0-3.0 parts of auxiliary vulcanizing agent, 5-15 parts of diphenyl silanediol, 1.0-2.0 parts of stearic acid, 4-6 parts of zinc oxide and 2-5 parts of ferric oxide, wherein the silicon rubber is phenyl ether supporting silicone rubber or phenylene silicone rubber; and the auxiliary vulcanizing agent is triene propyl cyanurate. The silicon rubber shielding material is good in radiation-resistant performance, and can give play to the specified function for a long time on radiation occasion when being used as a shielding layer of an electric wire and the cable.

The invention discloses an aging-resistant and low-temperature-resistant EPDM (ethylene-propylene-diene monomer) rubber cable material. The material comprises raw materials as follows: EPDM rubber, natural rubber, an ethylene-butene elastomer, superfine talc powder, nano calcium carbonate, modified superfine desulfurization ash, active calcium silicate, zinc methacrylate modified nano silicon nitride, pre-dispersed hollow phenolic microspheres, reinforcing fibers, zinc oxide, stearic acid, dicumyl peroxide, sulfur, N,N'-meta phenylene bismaleimide, diphenylmethane bismaleimide, DIPDIS, coumarone-indene resin, APP (ammonium polyphosphate), ADP, an MPE (metallocene polyethylene) elastomer, N-(4-anilino phenyl maleimide and 2-mercapto benzimidazole. The aging-resistant and low-temperature-resistant EPDM rubber cable material is high in strength, good in aging resistance and low-temperature resistance, excellent in insulating property and flame retardation and long in service life.

The invention discloses a high-strength and shock-resistance type metal ceramic composite lining plate and a preparation method thereof. The composite lining plate comprises, by mass, 20-80 parts of ceramic particles, 30-80 parts of metal powder, 30-50 parts of ultra-high molecular weight polyethylene, 5-10 parts of medium density polyethylene, 6-8 parts of low density polyethylene, 1-3 parts of magnesium hydroxide, 1-2 parts of diatomite, 10-15 parts of glass fibers, 0.5-1 part of dicumyl peroxide, 1-5 parts of coupling agent, 1-3 parts of antistatic agent, 1-3 parts of curing agent and 1-2 parts of addition agent. The preparation method includes the steps that the ceramic particles, the metal powder and the addition agent are mixed first so that a mixture A can be obtained; then the other components are mixed so that a mixture B can be obtained; afterwards, the mixture A and the mixture B are mixed, formed, sintered, quenched and tempered, and accordingly the composite lining plate is obtained. The metal ceramic composite lining plate has the characteristics of excellent abrasion resistance, impact resistance, chemical corrosion resistance and low-temperature toughness, and meanwhile has the characteristics of being good in processability and low in material cost.

The invention discloses a method using the ozone oxidation to improve the performance of the EVA / PE blend foam material. (a) the ozone oxidation is done for the polyethylene (PE) powder at the temperature between 20 and 90 Celsius system; the concentration of the ozone gas is between 10 and 75 mg per liter; the time of the ozone oxidation is between 10 and 180 minutes; (b) the ethylene-acetate ethylene ester copolymer (EVA) and the polyethylene treated by the ozone oxidation are mixed well according to the proportion from 90 to 10 to form 60 to 40; 100 weight shares of the mixture, 0.5 to 0.8 weight shares of the dicumyl peroxide (DCP), 2.0 to 4.0 weight shares of the vesicant, 0.4 to 1.2 weight shares of the zinc oxide (ZnO), 0 to 0.6 weight shares of the stearic acid (HSt), 0 to 0.6 weight shares of the zinc stearate (ZnSt) and 0 to 10 weight shares of the inorganic mineral powder are taken; the dual-roller mixer is added into to be melted and mixed; the mixing temperature is between 105 and 130 Celsius system; the mixing time is between 10 and 15 minutes; then the EVA / PE blend complex can be made; (c) the blended complex is arranged on the flat vulcanization machine to mold and foam; the foaming temperature is between 160 and 170 Celsius system; the mold compression pressure is between 10 and 15 MPa; the foaming time of the mold compression is between 15 and 35 minutes; then the EVA/PE blend foam material can be made.

The invention discloses a high temperature resistant wire rope core flame-retardant conveying belt, and solves the problem that the conventional wire rope core flame-retardant conveying belt is not high temperature resistant. According to the invention, the sizing material of an upper covering bond layer as well as that of a lower covering bond layer comprise the following ingredients in part by weight: 30 to 50 parts of ethylene-propylene-diene rubber, 25 to 35 parts of chlorinated butyl rubber, chlorosulfonated polyethylene rubber or neoprene, 25 to 35 parts of chlorinated polyethylene rubber, 4 to 6 parts of dicumyl peroxide, 0.5 to 1.5 parts of sulfur, 0.5 to 1 part of tert-octylphenol-formaldehyde resin, 1 to 3 parts of epoxy resin, 8 to 12 parts of zinc oxide and/or magnesium oxide, 1 to 2 parts of stearic acid, 2 to 8 parts of accelerating agent, 2 to 4 parts of antiager, 8 to 15 parts of conductive carbon black, 25 to 45 parts of high abrasion resistant carbon black, 10 to 15 parts of active glass fiber powder, 20 to 50 parts of solid flame retardant, 10 to 20 parts of liquid flame retardant, and 3 to 8 parts of flame-retardant lubricant MB-202. Two glass fiber canvas thermal insulating layers are arranged between a middle bond layer and the upper covering bond layer and between the middle bond layer and the lower covering bond layer respectively. The high temperature resistant wire rope core flame-retardant conveying belt can be used for a long time at the temperature of 250 DEG C, and meets the conveying requirements of special high-temperature materials.

The invention discloses a water tree-resistant polyethylene insulated cable material and a preparation method thereof. The cable material is prepared by the following raw materials in parts by weight: 70-80 parts of low-density polyethylene, 10-15 parts of maleic anhydride grafted EVA (ethylene vinyl acetute), 5-10 parts of maleic anhydride grafted POE (polyolefin elastomer), 0.5-1.5 parts of sorbitol, 2-3 parts of polyethylene glycol, 2-3 parts of dicumyl peroxide, 0.4-0.6 parts of antioxidant DLTP (dilauryl thiodipropionate), 3-4 parts of triallyl isocyanurate, 2-3 parts of polydimethylsiloxane and the like. According to the cable material and the method, maleic anhydride grafted EVA and maleic anhydride grafted POE with good compatibility with low-density polyethylene are added to improve a polyethene structure, and sorbitol, polyethylene glycol, polydimethylsiloxane and the like are added to inhibit water tree formation, so that the water tree aging resistance and physical and mechanical properties of the polyethylene cable material are improved obviously; a technical bottle neck of water tree growth of the cable insulation layer is solved; the service life of a cable is prolonged; and the cable safety during use is improved.

The invention discloses a medium-voltage ethylene propylene rubber insulating material and a preparation method thereof. The medium-voltage ethylene propylene rubber insulating material comprises the following components in percentage by weight: 15-30 percent of ethylene-propylene-diene rubber, 9-20 percent of ethylene-propylene rubber, 4-10 percent of linear low-density polyethylene, 4-7 percentof zinc oxide, 0.1-0.4 percent of stearic acid, 5-35 percent of superfine talc powder, 4-7 percent of paraffin hydrocarbon oil, 0.5-3 percent of paraffin, 10-30 percent of calcining clay, 0.1-0.9 percent of surface active agent gamma-aminopropyltriethoxysilane, 0.4-1.8 percent of antiager 4,4'di(alpha,alpha dimethylbenzyl)diphenylamine, 0.5-1.5 percent of vulcanizer dicumyl peroxide and 0.3-1.4 percent of vulcanizing agent triallyl cyanurate. By synthesizing the performance of various materials and learning from strengths to offset their weaknesses, the aims of reducing the cost and improvingthe electric performance are achieved. Tests prove that the medium-voltage ethylene propylene rubber insulating material disclosed by the invention has the volume resistivity of 1014 ohm.m and the breaking-down field strength of larger than 30KV/mm and has the advantages of excellent electric performance, higher thermal ageing performance and physical and mechanical performance, simple preparation process and strong operability.

This invention relates to a method for improving the fluidity of thermoplastic vulcanized rubber. The method comprises: (1) pre-mixing rubber with plastic (30-50% of total plastic); (2) mixing the premixed rubber with the rest plastic; (3) dynamically vulcanizing; (4) adding dicumyl peroxide (1-4% of the second plastic addition), melting and mixing to obtain the thermoplastic vulcanized rubber. The fluidity of the thermoplastic vulcanized rubber is largely improved, while its physical and mechanical properties are maintained.