49 results about "Decabromodiphenyl ethane" patented technology

The invention belongs to the technical field of PVC coated cloth, and particularly relates to environment-friendly welding-resistant low-cost coated cloth meeting the BS7837 standard. The coated fabric is a PVC coated fabric, and a PVC coated fabric coating taking WSFR-9702, antimony trioxide and decabromodiphenyl ethane as flame retardants is obtained through a large number of screening, so that the coated fabric simultaneously meets the comprehensive performance requirements of meeting the high flame retardance requirement of the BS7837 standard, meeting the high environmental protection requirement of the REACH regulation, being resistant to welding, low in cost, free of precipitation, folding white and the like; therefore, the method has the advantages of environmental protection, cost reduction and quality improvement, the comprehensive competitive advantage of the product is improved, and the method has great industrial application value.

The invention discloses an aqueous film-forming foam extinguishing agent based on a short fluorocarbon chain, and relates to the technical field of extinguishing agents. The invention discloses an aqueous film-forming foam extinguishing agent based on a short fluorocarbon chain. The cleaning agent is prepared from the following raw materials in parts by weight: 8 to 12 parts of modified short fluorocarbon chain surfactant, 5 to 8 parts of dodecyl dimethyl betaine, 50 to 60 parts of deionized water, 2 to 4 parts of modified guar gum, 4 to 6 parts of ethylene glycol, 1 to 2 parts of benzotriazole, 0.5 to 1 part of sodium bicarbonate, 0.3 to 0.5 part of polydimethylsiloxane, 3 to 5 parts of decabromodiphenyl ethane and 1 to 2 parts of sodium carboxymethyl cellulose. 0.5 to 1 part of disodium ethylene diamine tetraacetate, 0.2 to 0.4 part of isothiazolinone and 0.5 to 1 part of nano silicon dioxide. According to the aqueous film-forming foam extinguishing agent based on the short fluorocarbon chain, the modified short fluorocarbon chain surfactant and the nano silicon dioxide cooperate, so that a film is formed quickly and compactly, and the extinguishing efficiency is high; the modified guar gum improves the foam stability, and the foam holding time is long; the raw material ratio is scientific, and both equipment protection and fire control are considered; the preparation process is rigorous, the product quality is stable, and various fire extinguishing scenes are adapted.

The invention relates to an aramid fiber flame-retardant fabric and a preparation method thereof, and belongs to the technical field of fabric preparation, and the preparation method specifically comprises the following steps: pretreating aramid fibers, blending antistatic fibers and para-aramid fibers, and spinning warp and weft yarns; the yarn is subjected to padding and heat treatment through the flame-retardant finishing liquid to obtain flame-retardant yarn; weaving gray fabric with flame-retardant yarns, and setting the warp and weft density; and tentering, sizing and rolling the gray fabric to obtain the aramid fiber flame-retardant fabric. The advantages of the meta-aramid, the para-aramid and the antistatic fibers are combined to blend the warp and the weft, so that the strength, the flame retardance and the antistatic performance of the fabric are enhanced. The modified carboxylated cellulose nanocrystal, the metal oxide and the decabromodiphenyl ethane are compounded into the flame retardant, so that the flame retardant effect is improved, and the cost is reduced. The fibers treated by the alkali liquor have strong affinity with the flame retardant, the nanocrystalline reinforces the surfaces of the fibers, the adhesion of the flame retardant is enhanced by the tissue pattern design, and the flame retardant property of the aramid fabric is further improved.

The invention belongs to the technical field of brominated flame retardant synthesis, and particularly provides a decabromodiphenyl ethane bromine distillation process chlorination bromine removal process, which comprises the following steps: S1, adding bromine into a reaction kettle, adding a catalyst, and mixing; cooling and dropwise adding molten diphenylethane; then heating, carrying out a heat preservation reaction, and cooling to obtain a brominated crude product; s2, S201, adding the brominated crude product obtained in S1 into a bromine steaming kettle, and heating; s202, chlorine is introduced, and the total amount of bromine and chlorine is detected; carrying out segmented control on the introduced chlorine according to the total amount of bromine and chlorine; s203, when the total amount of bromine and chlorine is reduced to a threshold value, stopping introducing chlorine, standing, cooling, and introducing nitrogen; s3, filtering the feed liquid in the bromine steaming kettle, washing and purifying for three times, and finally, centrifugally dewatering to obtain a faint yellow solid; and S4, adding the faint yellow solid into a high-temperature jet mill, performing high-temperature aging to obtain white powder, and then performing jet milling on the white powder to obtain a finished product. Physical distillation is replaced by chemical replacement, so that bromine is highly separated.

A flame retardant polyamide composition comprising a synergistic combination of an epoxy terminated brominated epoxy polymer and a tribromophenol terminated brominated epoxy polymer. The polyamide composition has excellent heat resistance and good elongation at break properties without the presence of decabromodiphenylethane.

The invention discloses a composite flame retardant, a preparation method and application of the composite flame retardant in a thermoplastic resin composite material, and the preparation method of the composite flame retardant comprises the following steps: fully mixing alkali metal chromate, soluble copper salt, soluble aluminum salt, an organic solvent and deionized water to obtain a mixed solution; cooling, washing and filtering the mixed solution to obtain a precursor CuAl2 (CrO4) 4; the precursor CuAl2 (CrO4) 4 is calcined at the temperature of 720-800 DEG C for 20-24 h, and a calcined product is obtained; and uniformly mixing the calcined product with decabromodiphenyl ethane to prepare the composite flame retardant. The composite flame retardant has excellent flame retardant property, and the flame retardant effect of the thermoplastic resin composite material can be remarkably improved, so that the application requirements of the thermoplastic resin composite material in more fields are met.

The invention discloses a foaming material for a floor sound insulation board and a preparation method of the foaming material. Comprising the following raw materials in parts by weight: 25-45 parts of nitrile rubber, 25-45 parts of polyvinyl chloride, 10-20 parts of chlorinated polyvinyl chloride, 110-150 parts of filler, 10-20 parts of a foaming agent, 5-15 parts of decabromodiphenyl ethane, 3-7 parts of antimony trioxide, 1-3 parts of butadiene rubber, 8-12 parts of carbon black, 4-8 parts of paraffin, 65-85 parts of chlorinated paraffin oil, 2-3 parts of a lubricant, 1-3 parts of epoxidized soybean oil, 0.3-0.9 part of an anti-aging agent and 2-4 parts of an accelerant. 0.2 to 0.6 part of zinc oxide and 0.4 to 0.8 part of vulcanizing agent. The foaming material provided by the invention takes the nitrile rubber, the polyvinyl chloride and the chlorinated polyvinyl chloride as main materials, is used for the floor sound insulation board, and has high mechanical properties and good anti-aging performance.

The application provides a phosphorus-nitrogen rare earth compound and a rare earth flame-retardant fabric, which comprises a flame-retardant coating primer and a flame-retardant coating top glue, wherein the flame-retardant coating primer is made of raw materials including the following components in parts by weight: polyurethane emulsion 30-35 parts, the phosphorus-nitrogen rare earth compound of claim 1 15-50 parts, decabromodiphenyl ethane 5-25 parts, N,N-dimethylformamide 20-30 parts, a bridging agent 1-3 parts, a crosslinking agent 1-1.5 parts, and a promoter 0.2-1.5 parts. The phosphorus-nitrogen rare earth compound has excellent synergistic flame-retardant performance, can replace halogen and antimony-containing compounds in a flame-retardant system, reduces the generation of smoke and harmful gases, and has strong structural stability to the para-position structure of hydroxyphenyl phosphoric acid in the form of ion state under specific reaction conditions, and the specific triazine ring structure of melamine can effectively improve the thermal stability of the fabric.

The invention relates to the technical field of flame-retardant resin, in particular to application of decabromodiphenylethane in preparation of flame-retardant resin.The decabromodiphenylethane serves as a core, the decabromodiphenylethane is doped into the flame-retardant resin, and the preparation method specifically comprises the steps that nanometer boron nitride, stearic acid modified magnesium hydroxide and zinc borate are evenly blended, a polyvinylpyrrolidone aqueous solution is added into mixed powder, ultrasonic dispersion is conducted, and a mixture is obtained; spraying and drying to obtain composite powder; adding polypropylene, decabromodiphenyl ethane, the composite powder, maleic anhydride grafted polypropylene and an antioxidant into a high-speed mixer to obtain a mixture; and setting the temperature gradient of an extruder, and carrying out melt blending, water cooling and pelletizing on the mixture to obtain the flame-retardant resin master batch. The decabromodiphenyl ethane is taken as a core and is doped into the flame-retardant resin, and gas phase-condensed phase synergistic flame retardance is realized by optimizing the dosage of a flame retardant and selecting a synergist.

The application belongs to the field of high polymer materials, and particularly relates to a modified polypropylene foaming material and a preparation method thereof. The modified polypropylene foaming material is prepared from a blank through mold foaming, and the preparation raw materials of the blank include, in parts by weight, 50-90 parts of homopolymer polypropylene, 10-40 parts of polystyrene, 1-10 parts of fluorine-containing functional monomer, 0.01-0.5 parts of initiator, 0.01-1 parts of catalyst, 0.1-0.5 parts of nucleating agent, 1-10 parts of decabromodiphenyl ethane, 0.2-5 parts of antimony trioxide and 0.05-5 parts of anti-dripping agent. The homopolymer polypropylene is modified by using multiple components in cooperation, so that the comprehensive performance of the material is significantly improved. The material has the advantages of strong stability, high Shore C hardness, large compressive strength, low dielectric constant, excellent anti-aging performance, good flame-retardant effect and wide application prospect in the field of new energy vehicles.

The application relates to the technical field of cable materials, in particular to a flame-retardant cable sheath material and a preparation method thereof, wherein the flame-retardant cable sheath material comprises the following raw materials in parts by weight: 60-70 parts of polyvinyl chloride, 30-40 parts of butadiene styrene rubber, 8-10 parts of aluminum hydroxide, 5-7 parts of decabromodiphenyl ethane, 7-9 parts of ammonium polyphosphate, 1.5-2.5 parts of a dispersing agent, 1-3 parts of a silane coupling agent, 1-2 parts of a promoter M, 0.5-1.5 parts of a promoter DM, 2-4 parts of stearic acid, 2.5-5 parts of a calcium-zinc stabilizer, 1.6-2.0 parts of zinc oxide and 0.5-1.5 parts of an ultraviolet absorber; the flame-retardant cable sheath material has the advantage of improving the flame-retardant performance of the cable sheath.

The invention provides porous carbon, a silicon-carbon negative electrode material and a preparation method thereof, and the preparation method of the porous carbon comprises the following steps: providing a mixture comprising first resin, a flame retardant and a defoaming agent, dissolving the mixture in a first organic solvent, and carrying out spray drying to prepare a granular precursor, the flame retardant comprises at least one of decabromodiphenyl ethane, decabromodiphenyl ether, octabromodiphenyl ether, pentabromodiphenyl ether, tetrabromobisphenol A and hexabromocyclododecane, and at least one of decabromodiphenyl ether, octabromodiphenyl ether, pentabromodiphenyl ether, tetrabromobisphenol A and hexabromocyclododecane; carrying out carbonization treatment on the granular precursor to form a carbonization treatment product; and carrying out activating treatment on the carbonization treatment product to form the porous carbon.

The invention discloses a preparation process of a high-temperature-resistant flame-retardant chloroprene rubber composite material, and relates to the technical field of chloroprene rubber production. Wherein the raw materials comprise 80 to 100 parts of chloroprene rubber, 40 to 60 parts of magnesium hydroxide, 15 to 25 parts of decabromodiphenyl ethane, 6 to 10 parts of antimony trioxide, 4 to 6 parts of zinc oxide, 3 to 5 parts of magnesium oxide, 0.6 to 1 part of an accelerant NA-22, 1 to 2 parts of stearic acid, 0.8 to 1.5 parts of an anti-aging agent 4010NA, 0.8 to 1.5 parts of an anti-aging agent RD, 30 to 50 parts of carbon black N330, 8 to 15 parts of a plasticizer DOTP and 5 to 8 parts of a synergistic intermediate. Thermal oxidation degradation of a polymer chain is delayed through the synergistic anti-oxidation effect formed by adding the synergistic intermediate into the chloroprene rubber composite material raw material, and micronized wax migrates to the surface to form a physical barrier to effectively isolate oxygen, so that the requirements of high-temperature and high-reliability application scenes such as an automobile engine compartment and the like are met.

The utility model discloses a tail gas treatment device for decabromodiphenyl ethane production, which comprises a condensing box, a spraying box and a filtering box which are arranged on the same vertical line from bottom to top, a gas inlet pipe is arranged on the side edge of the condensing box, a condensate discharge pipe is arranged at the bottom of the condensing box, a condensing coil is arranged in the condensing box, and a water inlet pipe is arranged at the bottom of the spraying box. The spraying box is communicated with the condensing box through a top gathering plate with holes, an annular pipe is installed in the spraying box, a concentric-square-shaped flow guide groove is formed in the periphery of the spraying box, the spraying box is communicated with the filtering box through a separation net, a drawer box is installed in the filtering box in a sliding mode, and the drawer box is filled with an activated carbon layer. When tail gas passes through the condensing box, one part of the tail gas is condensed into liquid to be discharged, the other part of the tail gas is neutralized and discharged by alkali liquor through the spraying box, the rest of the tail gas is discharged after being adsorbed and filtered by an activated carbon layer through the filtering box, a plurality of treatment towers do not need to be arranged, and the whole device is small in size and convenient to use.

The utility model discloses vibration screening equipment for manufacturing decabromodiphenyl ethane master batch, which comprises a bottom box, a top box, a screen mesh, a vibration motor and a discharging box, a feeding hopper is arranged at a feeding port on the top box, a folding protective cover is movably arranged between two sides of the feeding hopper and the edge of the feeding port, the periphery of the bottom end of the feeding hopper is supported by a bracket, and the bottom end of the feeding hopper is connected with the screen mesh. A sliding base is fixed to the edge of the bracket, and a reciprocating lead screw penetrates through the interior of the sliding base and is in threaded connection with the sliding base. According to the master batch screening machine, the feeding hopper capable of moving in the width direction of the screen in a reciprocating mode is arranged, so that a worker firstly feeds master batches into the hopper to be away from equipment, then the master batches are scattered and poured on the screen to be screened through the reciprocating motion effect of the feeding hopper, more time and labor are saved, the folding protective cover is arranged at the position of the feeding port, and the working efficiency is improved. And the material inlet is always shielded, so that the overflow of raised dust generated during vibration is reduced, and the danger that a worker inhales the raised dust when operating the equipment is reduced.

The invention discloses a flame-retardant antibacterial colored sea-island fiber and a preparation method thereof. The method comprises the following steps: firstly, carrying out ball-milling nanocrystallization pretreatment on an inorganic dye; melting and blending a nano inorganic dye, the dried polyethylene glycol terephthalate slices, a decabromodiphenyl ethane flame retardant and a polyhexamethylene guanidine antibacterial agent in proportion to prepare multifunctional master batches; then, mixing and granulating the master batch and polyethylene glycol terephthalate slices to obtain island component slices; and finally, by taking the slices as island components and soluble polyethylene glycol terephthalate as a sea component, carrying out sea-island composite spinning, stretching and heat setting to obtain the finished fiber. Through the nanocrystallization and two-step dispersion process, the problem that multiple functional components are uniformly dispersed in polyethylene glycol terephthalate is solved, and the obtained fiber is uniform in color and luster, high in color fastness, excellent in lasting flame retardance and antibacterial performance, excellent in comprehensive quality and suitable for the field of high-end functional textiles.

The invention discloses a brominated flame-retardant PBT (polybutylene terephthalate) composition as well as a preparation method and application thereof. The brominated flame-retardant PBT composition comprises the following components in parts by weight: 35-75 parts of PBT resin; 9 to 20 parts of decabromodiphenyl ethane; 2-8 parts of a flame retardant synergist; 0.3-8 parts of a stabilizer; wherein the stabilizer comprises a neutral metal oxide, a light stabilizer and carbodiimide, and the mass ratio of the neutral metal oxide to the light stabilizer to the carbodiimide is (0.1-25): (0.1-10): 1. PBT resin is adopted as matrix resin, decabromodiphenyl ethane is adopted as a flame retardant, and a stabilizer with a specific proportion is added, so that the heat retention stability can be effectively improved, and the flame retardant property is not influenced.

The invention relates to the technical field of biological treatment of environmental organic pollutants, in particular to a decabromodiphenyl ethane degrading functional bacterium FD-1 and application thereof. The invention provides a decabromodiphenyl ethane degrading functional bacterium, namely bacillus licheniformis FD-1, the preservation number of the bacillus licheniformis is GDMCC No: 67641, the bacillus licheniformis FD-1 can quickly and efficiently degrade decabromodiphenyl ethane (the highest degradation rate of the bacillus licheniformis FD-1 to 1 mg / L decabromodiphenyl ethane can reach 76.7%), and a technical method can be provided for decabromodiphenyl ethane pollution abatement and bioremediation. The bacillus licheniformis FD-1 disclosed by the invention is high in environmental adaptability and relatively good in degradation effect on decabromodiphenyl ethane, and meanwhile, the advantage of reducing the cost is realized.

The invention discloses a brominated flame-retardant PET (Polyethylene Terephthalate) composition as well as a preparation method and application thereof. The brominated flame-retardant PET composition comprises the following components in parts by weight: 35-77 parts of PET resin; 8 to 22 parts of decabromodiphenyl ethane; 0.1-4 parts of a neutral metal oxide; 0.1-2 parts of a light stabilizer; and 0.1-1 part of epoxy resin. According to the brominated flame-retardant PET composition disclosed by the invention, the heat retention stability of the brominated flame-retardant PET composition can be effectively improved by adding a specific amount of neutral metal oxide, light stabilizer and epoxy resin into a decabromodiphenyl ethane flame-retardant PET composition system.

The utility model discloses decabromodiphenylethane crystallization and purification equipment, which relates to the technical field of decabromodiphenylethane production and comprises an outer shell, and a cooling crystallization mechanism is mounted on the inner side of the outer shell. According to the device provided by the utility model, cakes attached to the inner wall of the cooling shell and the inner wall of the guide cylinder are respectively scraped, and attached crystals are scraped back into a solution in time, so that the crystallization process is uniformly performed in the solution, and the crystallization efficiency and the product uniformity are ensured; the driving motor works to drive the connecting shaft to rotate, the spiral blade is spirally arranged outside the connecting shaft, materials are pushed to move in the direction of the connecting shaft, the materials circularly flow in the whole container, the stirring efficiency is improved, the stirring blade and the stirring plate move to stir the interior of the cooling shell at the same time, and uniform mixing of solutions is kept; the crystal purity is improved.

The invention relates to the technical field of combustion improvers, in particular to a water-based environment-friendly halogen-free flame retardant and a preparation method thereof. The preparation method of the flame retardant comprises the following steps: a treatment process: adding decabromodiphenyl ethane, antimony trioxide, ammonium polyphosphate, titanium dioxide and water into a mixing container, fully mixing, and pretreating to form a pretreatment solution; a mixing process: adding an acrylic emulsion and a thickening agent into the treatment solution in the mixing container, and fully mixing to form a halogen-free flame retardant; an inspection procedure: sampling the formed halogen-free flame retardant in the mixing container for multiple times, and inspecting whether the combustion effect of the sample is qualified after inspecting whether the sample contains unmixed large particles; and a packaging process: sub-packaging and packaging the qualified halogen-free flame retardant in the mixing container. The invention solves the problems of low preparation efficiency, difficulty in expanded production, high cost and no environmental protection caused by unreasonable formula of the existing halogen-free flame retardant.

The utility model discloses a mixer for decabromodiphenylethane, which belongs to the field of decabromodiphenylethane production equipment and comprises a mounting frame, a double-helix body, a mesh belt and a stirrer, the mounting frame is arranged above the mesh belt, the double-helix body is rotatably mounted in the mounting frame to convey mixed materials, the stirrer comprises a rotating shaft and a plurality of groups of stirring sheet components, and the rotating shaft is rotatably mounted in the mesh belt. The rotating shaft is rotatably mounted in the mounting frame, each group of stirring blade components are distributed on the rotating shaft at intervals along the axis direction of the rotating shaft, each stirring blade component comprises a plurality of blades, the plurality of blades are distributed on the periphery of the rotating shaft along the radial direction of the rotating shaft, and each blade comprises a body and two side wings; the two side wings are arranged on two sides of one end of the body away from the rotating shaft. According to the device, after the stirrer stirs a mixed material, the side wings flatten the mixed material between the blades and the mesh belt, it is guaranteed that the whole material surface can be stirred to be flat, uniform distribution of the mixed material is achieved, the production efficiency is improved, and the product production quality is guaranteed.

This invention provides an irradiated crosslinked, hydrolysis-resistant, low-halogen flame-retardant insulating material for energy storage cables and its preparation method, comprising the following raw material components in parts by weight: 43-51 parts of resin composition, 43-49 parts of flame-retardant composition, and 6.7-8 parts of auxiliary composition. The resin composition comprises the following components in parts by weight: 18-20 parts of ethylene-vinyl acetate copolymer; 10-12 parts of metallocene linear polyethylene; 7-9 parts of polyethylene elastomer; and 8-10 parts of POE graft compatibilizer. The flame-retardant composition comprises the following components in parts by weight: 12-14 parts of magnesium hydroxide; 21-23 parts of decabromodiphenyl ethane; and 10-12 parts of antimony trioxide. This results in a product exhibiting excellent mechanical properties, flame-retardant properties, hydrolysis resistance, long-term aging performance, and processing performance, with overall performance significantly superior to existing ordinary polyolefin insulating materials.

This invention relates to the field of cable technology and proposes a long-life overhead insulated cable. This long-life overhead insulated cable includes a conductor and an insulation layer. The insulation layer comprises the following raw materials in parts by weight: 80-100 parts high-density polyethylene, 10-20 parts polyolefin elastomer, 5-10 parts ethylene-vinyl acetate copolymer, 4-8 parts composite powder, 12-18 parts decabromodiphenyl ethane, 4-6 parts antimony trioxide, 0.5-1 part antioxidant, and 2.5-5 parts lubricant; wherein the composite powder is a core-shell structure inorganic particle with an organic ultraviolet absorber grafted onto the surface of ZnO@CeO2 core-shell particles. The long-life overhead insulated cable of this invention achieves the synergistic effect of inorganic ultraviolet shielding and organic ultraviolet absorption, significantly improving the cable insulation layer's resistance to ultraviolet aging, mechanical toughness, and weather resistance, effectively extending the service life of the overhead cable in complex outdoor environments.

The utility model discloses a stirring kettle for decabromodiphenyl ethane production, which relates to the technical field of decabromodiphenyl ethane production, and comprises a stirring kettle body, and a sealing cover is clamped at the top of the stirring kettle body. In the stirring kettle, one end of an arc-shaped scraping strip is fixedly connected with a support frame, one end of a scraping plate I is fixedly connected with a fixed block, and the other end of the scraping plate II is fixedly connected with the fixed block; when the motor drives the stirring rod to rotate, the arc-shaped scraping strip and the first scraping plate rotate along with the stirring rod, the arc-shaped scraping strip and the second scraping plate scrape the inner ring face of the stirring kettle body, the bottom of the first scraping plate scrapes the bottom of an inner cavity of the stirring kettle body, and the interior of the stirring kettle body can be flushed through the annular pipe and the spray head. Therefore, the cleaning intensity of the interior of the stirring kettle body can be improved, resource waste caused by residues of materials in the stirring kettle body is reduced, when the temperature is too high, the alarm gives an alarm, and when the air pressure in the stirring kettle body is too large, the pressure release valve quickly releases pressure, so that the use safety of the stirring kettle body can be improved.

The present invention provides a method for synthesizing decabromodiphenylethane, belonging to the technical field of brominated flame retardant synthesis. The method uses benzyl chloride as a reaction raw material and bromine chloride as a brominating agent to synthesize decabromodiphenylethane via a one-pot, two-step process. The metal chloride produced in the first step serves as a catalyst in the second step, and the diphenylethane produced in the first step can be directly subjected to a bromination reaction without isolation. The decabromodiphenylethane synthesis method of the present invention has the advantages of simple process, high efficiency, and high product yield.

The invention relates to the technical field of flame-retardant sheath rubber materials, in particular to a polyvinyl chloride rubber material and a preparation method thereof. The polyvinyl chloride sizing material comprises the following components in parts by weight: 100 parts of SG0 type polyvinyl chloride resin, 20-55 parts of a high-temperature-resistant plasticizer, 20-35 parts of a flame-retardant plasticizer, 15 parts of a low-temperature-resistant plasticizer, 15-20 parts of antimony trioxide, 70-80 parts of surface modified magnesium hydroxide, 25 parts of decabromodiphenyl ethane, 5-10 parts of a charring agent, 8 parts of a calcium-zinc stabilizer and 2 parts of a lubricant. According to the high-flame-retardant-grade polyvinyl chloride rubber material obtained through the formula and the technology, the preparation method and the cable, the large-wire-diameter cable can have the two properties of-40 DEG C cold winding and FT-4-grade flame retardance at the same time in a balanced state, and besides the temperature resistance grade of-40 DEG C to 105 DEG C and the combustion grade of FT-4, the cable has the advantages that the flame-retardant-grade polyvinyl chloride rubber material is obtained; and meanwhile, the cable wire with the wire diameter greater than 10mm does not crack after being wound at a low temperature.

The invention discloses a method for continuously synthesizing decabromodiphenylethane by using a tubular reactor, and belongs to the technical field of organic synthesis processes. The method comprises the following steps: by taking diphenylethane as a raw material, continuously brominating the diphenylethane and bromine in a tubular reactor at a certain material ratio, retention time and reaction temperature, feeding the reacted material into a gas-liquid separation device for gas-liquid separation, absorbing the gas with water, and carrying out post-treatment such as quenching, bromine steaming, alkali neutralization, washing, suction filtration and drying on the effluent liquid to obtain the product decabromodiphenylethane. According to the process method, a method different from a traditional intermittent synthesis method is adopted, and the synthesis efficiency and safety of decabromodiphenylethane are greatly improved.

The invention relates to the technical field of synthesis of flame retardants, and particularly discloses a preparation process of a brominated aromatic compound with uniform flame retardant efficiency. The invention relates to a preparation process of a brominated aromatic compound with uniform flame retardant efficiency, which comprises the following steps: adding bromine and a catalyst into a bromination kettle, dropwise adding molten diphenylethane into a reaction kettle, and carrying out bromination reaction to obtain reaction slurry containing decabromodiphenylethane; the method comprises the following steps: distilling and debrominating reaction slurry containing decabromodiphenyl ethane to obtain slurry A; performing shaping control on the slurry A to obtain slurry B; carrying out primary filter pressing and washing on the slurry B to obtain a primary wet filter cake; homogenizing the primary wet filter cake to obtain slurry C; carrying out secondary filter pressing and washing on the slurry C to obtain a secondary wet filter cake; drying the secondary wet filter cake to obtain intermediate product coarse powder; carrying out passivating treatment on the intermediate product coarse powder to obtain treated powder; and sieving the treated powder, and then crushing to obtain the brominated aromatic compound.

The invention relates to the technical field of high polymer materials, and discloses a preparation method of a high-performance flame-retardant modified plastic special material for electric appliance parts. The preparation method comprises the following steps: selecting nylon, polycarbonate, polyphenylene sulfide, decabromodiphenyl ethane, magnesium hydroxide, resorcinol diphosphate, antimony trioxide, carbon fibers, potassium titanate fibers, nickel-plated carbon fibers, zinc stearate, polyethylene wax, an ethylene-vinyl acetate copolymer and an inorganic antistatic agent as raw materials, pre-treating the raw materials, carrying out surface treatment on the carbon fibers, carrying out heat treatment on the treated carbon fibers, and carrying out heat treatment on the treated carbon fibers; the preparation method comprises the following steps: weighing raw materials according to a formula, pre-mixing to primarily disperse all the components uniformly to form a premix, putting the premix into a double-screw extruder for melt blending, setting the temperature of each section and the rotating speed of a screw, extruding the melt material into strips through a die head, air-cooling to the set temperature, pelletizing, drying the prepared particles, and detecting the moisture content. Mixing the dried and qualified particles with an inorganic antistatic agent, carrying out surface modification treatment, and finally detecting the flame-retardant, mechanical and thermal performance indexes of the special plastic material.