147 results about "Chlorinated polyethylene" patented technology

The invention provides an acetylacetone-based composite thermal stabilizer which is a mixture obtained by mixing zinc acetylacetonate, calcium acetylacetonate or magnesium acetylacetonate and hydrotalcite pro rata. The composite thermal stabilizer is suitable for chloride-containing high polymer, such as polyvinyl chloride, chlorinated polyethylene, chlorinated polyvinyl chloride, copolymer of vinyl chloride-ethylene or copolymer of vinyl chloride-vinyl acetate, has better thermal stability, prolongs the thermal aging time of the chloride-containing high polymer, and overcomes the shortcomings of poor long-term performance of single stabilizer of zinc acetylacetonate, poor transparency of stabilizer of calcium acetylacetonate, and poor initial colorability of stabilizer of hydrotalcite. The composite thermal stabilizer has low cost, good initial colorability, excellent long-term performance and good transparency, and is an efficient composite thermal stabilizer.

The invention provides a high-strength corrosion-resistant CPVC plate and a preparation method thereof, and belongs to the technical field of high polymer materials, the preparation method comprises the following steps: S1, preparing Si-MBS; s2, mixing CPVC resin powder, Si-MBS, chlorinated polyethylene, a stabilizer, a processing aid, a lubricant and a coupling agent-hollow microsphere, melting, plasticizing, extruding, calendaring to form a plate, and cooling and shaping to obtain a CPVC base material; and S3, spraying the coating slurry containing ZIF-67 / GO-coated BTA / PEI powder on the surface of the CPVC base material, vacuumizing, and curing to obtain the high-strength corrosion-resistant CPVC plate. The overall strength and impact resistance can be improved, and meanwhile the overall corrosion resistance is improved.

The invention relates to the technical field of high polymer materials, and particularly discloses high-weather-resistance chlorinated polyethylene and a preparation method thereof. The high-weather-resistance chlorinated polyethylene is prepared from the following raw materials in parts by weight: 110 to 150 parts of chlorinated polyethylene, 9 to 15 parts of chloroprene rubber coated nano titanium dioxide, 38 to 60 parts of ionic liquid modified nano calcium carbonate, 5 to 10 parts of polyvinylidene fluoride resin, 10 to 20 parts of chlorinated paraffin and 1 to 6 parts of antioxidant, the preparation method comprises the following steps: S1, preparing chloroprene rubber coated nano titanium dioxide; s2, preparing ionic liquid modified nano calcium carbonate; s3, internal mixing; and S4, carrying out screw extrusion and press polish. The high-weather-resistance chlorinated polyethylene can be used for building waterproof coiled materials, outdoor protective coatings, automobile sealing strips, wire and cable sheaths and the like, and has the advantages of high tensile strength, elongation at break, impact toughness, ultraviolet aging resistance and thermo-oxidative degradation resistance.

The utility model discloses a water circulation system of a chlorinated polyethylene device, and belongs to the technical field of fine chemical engineering. The system comprises a hot water pool and a cold water pool, the output end of the cold water pool is respectively connected with a jacket of a chlorination kettle, a jacket of a material waiting kettle, a drying system and a belt filter, the output end of heating steam is connected with the jacket of the chlorination kettle and the drying system, and the jacket of the chlorination kettle and the output end of the drying system are connected with the hot water pool. According to the utility model, the water resource at the jacket outlet of the chlorination reaction kettle is fully utilized.

Hoses include inner tube, a reinforcement layer disposed outwardly from the inner tube, and a cover layer disposed outwardly from the reinforcement layer, and the cover layer and / or inner tube is based on a cured composition formed from a mixture containing a blend of chlorinated polyethylene (CPE) and cross-linkable oxidized high density polyethylene (oxidized HDPE), where the CPE and oxidized HDPE are blended in a CPE:oxidized HDPE weight ratio of from 10:1 to 1:1, and a peroxide curing system. The peroxide curing system used in some compositions according the disclosure include alpha-alpha-bis(t-butylperoxy)diisopropylbenzene and trimethylolpropane trimethacrylate.

The application relates to the field of epoxy resin modification, in particular to a preparation method of a self-emulsifying epoxy resin. The method overcomes the defects of the prior art, such as the need to add an emulsifier and mechanical stirring for emulsification, easy demulsification, low epoxy value and the like. The preparation method comprises the following steps: firstly, adding a Lewis acid into a mixed solution of polyethylene glycol and epoxy chloropropane to prepare one-side chlorinated polyethylene glycol; secondly, adding bisphenol A into the one-side chlorinated polyethylene glycol system to make the one-side hydroxyl group of the bisphenol A graft with polyethylene glycol through a Williamson ether reaction under the catalysis of alkali; and thirdly, adding epoxy chloropropane into the bisphenol A solution grafted with one-side polyethylene glycol to make the other-side hydroxyl group of the bisphenol A graft with an epoxy group under the catalysis of alkali, so as to prepare the epoxy resin with self-emulsifying effect. The raw materials of the reaction method are cheap and easy to obtain, the method is simple, the toxicity is relatively small, there is no by-product after the reaction is completed, and the environment pollution is relatively small. The reaction raw material utilization rate is high, the yield is high, the method meets the concept of green paint, and can be widely applied to the industrial production fields of paint and material.

The present disclosure relates to a polyethylene, which is reacted with chlorine to prepare a chlorinated polyethylene having excellent chlorination productivity and thermal stability by enabling an increase in chlorination temperature, and facilitating deoxidation, dehydration and drying processes during chlorination processing, by implementing an enlarged area of the middle and high molecular weight regions in the molecular structure of the polyethylene.

The invention relates to a corrosion-resistant marine cable and a preparation method thereof.The corrosion-resistant marine cable comprises a wire core composed of a conductor and an insulating layer wrapping the conductor, and further comprises a gradient composite corrosion-resistant sheath wrapping the wire core, and the gradient composite corrosion-resistant sheath is of a three-layer co-extrusion integrated structure and comprises a bottom layer combined with the insulating layer, the bottom layer comprises the following components in parts by weight: 80-90 parts of thermoplastic polyurethane and 10-20 parts of a corrosion inhibitor; the middle layer is coated outside the bottom layer and comprises the following components in parts by weight: 90-99 parts of chlorinated polyethylene and 1-10 parts of graphene modified epoxy resin; and the surface layer is coated outside the middle layer and comprises the following components in parts by weight: 95-99 parts of fluororubber and 1-5 parts of carbon nanotubes. When the corrosion-resistant marine cable is applied to a complex corrosion environment with high salt mist and much oil dirt in the ocean, the corrosion-resistant marine cable has good comprehensive protection capability, and the service life of the cable is remarkably prolonged.

The application belongs to the technical field of polymer materials, and particularly discloses a high-pore-volume special resin for chlorinated polyethylene and a preparation method thereof, which comprises the following steps: S1, powder polyethylene resin is put into a first stirring kettle, vacuum is drawn to a predetermined vacuum degree, constant pressure is kept, and oxygen in the first stirring kettle and the pores of the polyethylene resin is discharged; S2, inert gas is introduced into the first stirring kettle to a predetermined pressure, the inert gas is allowed to permeate into the pores of the polyethylene resin, and the temperature is raised to a predetermined temperature; as the temperature rises, the polyethylene resin gradually softens; S3, the softened polyethylene resin filled with inert gas is transported to a low-temperature and low-pressure second stirring kettle, under the action of pressure difference, the inert gas in the pores of the polyethylene resin instantaneously expands and releases, the pores of the softened resin are enlarged by the gas expansion effect, and as the polyethylene resin is in a low-temperature environment, the polyethylene resin solidifies, the resin pores no longer shrink, and thus the high-pore-volume special resin for chlorinated polyethylene is obtained.

The application relates to the technical field of polyvinyl chloride sleeves, and discloses a flame-retardant PVC sleeve and a preparation method thereof. The flame-retardant PVC sleeve comprises an inner tube, a metal copper mesh coated on the outer side of the inner tube, and an outer tube coated on the outer sides of the metal copper mesh and the inner tube by injection molding. The raw material of the inner tube comprises the following components: 80-150 parts of polyvinyl chloride, 1-3 parts of chlorinated polyethylene, 20-40 parts of active nano calcium carbonate, 1-2 parts of paraffin, 1-2 parts of stearic acid, 1-3 parts of a flame retardant, and 1-2 parts of a calcium-zinc stabilizer. The raw material of the outer tube comprises the following components: 50-120 parts of polyvinyl chloride, 1-5 parts of activated fiber, 10-20 parts of active nano calcium carbonate, 1-2 parts of zeolite powder, 1-2 parts of magnesium oxide, 1-2 parts of paraffin, 1-2 parts of polyethylene wax, 1-2 parts of stearic acid, 1-5 parts of a flame retardant, 1-3 parts of a calcium-zinc stabilizer, and 1-2 parts of a processing aid LPA40. The application further discloses a preparation method of the flame-retardant PVC sleeve.

The invention relates to the technical field of wire and cable manufacturing, in particular to an anti-corrosion cable and a preparation method thereof, and the anti-corrosion cable comprises a conductor, an anti-corrosion isolating layer, an insulating layer, an armor layer and an outer sheath from inside to outside. The surface of the conductor is plated with an aminated graphene-nickel-phosphorus composite plating layer; the anti-corrosion isolating layer contains 30-40 parts of fluorine rubber, 10-15 parts of nano boron nitride-silicon dioxide core-shell particles and the like; the insulating layer contains 45-55 parts of crosslinked polyethylene, 8-12 parts of montmorillonite-carbon nanotube-graphene composite powder and the like; the armor layer is formed by compounding a basalt fiber-glass fiber composite filament woven mesh and a polyether-ether-ketone-polyimide composite film; and the outer sheath contains 25-35 parts of chlorinated polyethylene, 5-8 parts of nano titanium dioxide-cerium oxide composite powder and the like. The corrosion-resistant cable has the advantages of corrosion resistance, strong weather resistance, excellent electrical and mechanical properties, long service life and low maintenance cost, can stably operate for a long time in severe environments such as high salinity and high humidity, and is suitable for multi-corrosion scenes.

The application relates to the cable technical field and discloses a 35kV aging-resistant power cable which comprises, from inside to outside, a conductor, a conductor shielding layer, an insulation layer and a sheath layer; the raw material of the sheath layer comprises the following components in parts by weight: 100 parts of chlorinated polyethylene, 15-20 parts of chlorosulfonated polyethylene material, 7-12 parts of ethylene-vinyl acetate copolymer, 10-15 parts of ethylene-propylene-diene rubber, 10-15 parts of filler, 0.2-0.4 parts of vulcanizing agent, 2-3 parts of activator and 5-8 parts of compatibilizer; the raw material of the chlorosulfonated polyethylene material comprises the following components in parts by weight: 60 parts of chlorosulfonated polyethylene, 5-10 parts of zeolite, 5-10 parts of illite and 0.5-2.5 parts of rare earth stearate. Through the technical scheme, the problem that the aging resistance of the sheath layer of the power cable needs to be improved in the related art is solved.

The application relates to the cable field and particularly discloses a mine rubber-sheathed cable insulation shielding material and a preparation method thereof. The insulation shielding material comprises the following raw materials in parts by weight: chlorinated polyethylene 100 parts; conductive carbon black 37-40 parts; graphene 1-2 parts; flake graphite powder 3-6 parts; plasticizer 25-30 parts; light magnesium oxide 6-10 parts; calcium stearate 1-2 parts; antioxidant 1-2 parts; calcium hydroxide 3-5 parts; vulcanization cross-linking system 7-9 parts; polyethylene wax 1-2 parts; peeling regulation component, which comprises 3-4 parts of polytetrafluoroethylene superfine powder, 2.5-3.5 parts of shellac and 1.5-2.5 parts of fluorosilicone oil. The preparation method comprises the following steps: raw material pretreatment; and sectional temperature control mixing. The insulation shielding material has the advantages of excellent processing technology, conductive performance and stable controllable peelable interface between the insulation shielding material and the ethylene-propylene insulation layer.

The application discloses a high-temperature-resistant polyvinyl chloride adhesive tape and a preparation method thereof, and belongs to the technical field of polymer materials and adhesive products. The high-temperature-resistant polyvinyl chloride adhesive tape comprises the following raw materials in parts by weight: synergistically modified polyvinyl chloride, diphenyl phosphine oxide, chlorinated polyethylene, diisononyl phthalate, antimony trioxide, calcium stearate, zinc stearate, an antioxidant and a leveling agent; the synergistically modified polyvinyl chloride is obtained by introducing catechol structures on the surface of polyvinyl chloride through dopamine self-polymerization deposition, forming a dynamic borate ester structure with 3-aminobenzoic acid, and constructing a Si-O-Si network structure through hydrolytic condensation reaction of octa(3-aminopropyl)silsesquioxane and N-(beta-aminoethyl)-gamma-aminopropyl triethoxysilane. The dopamine-borate ester-silicone synergistic network structure is constructed, and the diphenyl phosphine oxide is introduced for function regulation, so that the heat resistance, mechanical properties and dimensional stability of the polyvinyl chloride adhesive tape are significantly improved.

This invention discloses a method for preparing low-temperature resistant chlorinated polyethylene, belonging to the technical field of chlorinated polyethylene preparation. The preparation method includes the following steps: raw material preparation, chlorination reaction, and post-treatment. In the chlorination reaction, deionized water, high-density polyethylene powder, a swelling agent, and a first dispersant are added to a reaction vessel for swelling. Alkaline earth metal oxides are added, and the mixture is stirred at room temperature. A second dispersant, emulsifier, and initiator are added, and the mixture is stirred again. An anti-adhesion agent is added, the reaction vessel is sealed, and the temperature is raised to 75-80°C. A vacuum is drawn to a pressure of -0.04 MPa to -0.03 MPa, and a first chlorine gas is introduced. The temperature is raised to 110-115°C, and a second chlorine gas is introduced. The temperature is raised to 134-136°C, and a third chlorine gas is introduced. The chlorine gas introduction is stopped, and the mixture is cooled to room temperature. The chlorinated polyethylene prepared by this invention exhibits good low-temperature resistance, low colored particle number and ash content, high tensile strength, and low Shore hardness.

The application discloses a kind of high-efficiency heat-insulating glass wool products and preparation method thereof, the glass wool includes multiple glass fibers, the surface of the glass fiber is infiltrated with composite heat-insulating coating, the interstitial filling of the glass fiber is filled with composite heat-insulating filler;The component of the composite heat-insulating coating includes epoxy resin 30-50 parts by weight, hydroxyl acrylic resin 10-15 parts, silicone resin 10-15 parts, high-chlorinated polyethylene 5-10 parts and auxiliary agent 3-5 parts;The composite heat-insulating filler includes hollow glass microbeads, hollow ceramic microbeads, functional filler filled in micropore of hollow glass microbeads and hollow ceramic microbeads and filler adhesive component, the advantage of the application is that the composite heat-insulating coating and the composite heat-insulating filler are supplemented for traditional glass wool, on the one hand, the heat-insulating performance of the overall glass wool is greatly improved, on the other hand, the structural strength of the overall glass wool is also effectively improved.

This utility model relates to the field of power cables, and more particularly to a copper-core cross-linked polyethylene insulated steel wire armored power cable for use in the petrochemical industry. It features a conductor made of high-purity oxygen-free copper wire of specific specifications, twisted in the same right-hand direction. The purity of the copper wire, the diameter of each wire, the number of strands, and the twisting pitch all meet specific requirements to ensure good conductivity and flexibility. The cross-linked polyethylene insulation layer tightly covers the conductor, with insulation thickness depending on the voltage and a moderate degree of cross-linking, providing excellent insulation and heat resistance. The steel wire armor layer is woven or wound into a double-layer structure using high-strength galvanized steel wire conforming to Q195 standards, with a coverage rate of not less than 80%, effectively enhancing mechanical protection. The inner sheath is made of polyvinyl chloride or polyethylene, and the outer sheath is made of oil-resistant, corrosion-resistant, and weather-resistant chlorosulfonated polyethylene or chlorinated polyethylene. Both layers have appropriate thicknesses; the inner sheath buffers and protects the insulation layer, while the outer sheath resists harsh environmental corrosion.

The application discloses PVC drainage pipe material and a preparation method thereof, and belongs to the technical field of plastic pipe material. The raw materials of the PVC drainage pipe material include 90-100 parts of PVC resin, 10-20 parts of filler, 2-5 parts of heat stabilizer, 1-4 parts of chlorinated polyethylene, 1-3 parts of coupling agent, 2-4 parts of anti-aging agent, 1-1.5 parts of lubricant and 0.01-0.1 part of initiator. The anti-aging agent, the filler and the PVC resin form a crosslinked hybrid network structure, so that the filler and the anti-aging agent can be highly dispersed and stably exist in the PVC drainage pipe material, are not easy to migrate and be released, and continuously and stably play the roles of enhancing the mechanical properties, the oxidation resistance and the light stability of the PVC drainage pipe material. The anti-aging agent is different from the small molecule anti-oxidant on the market, is better compatible with the PVC resin, is more not easy to migrate and be released, and can fully play the oxidation resistance and the light stability.

This invention discloses a low-foaming rigid polyvinyl chloride (PVC) drainage pipe and its preparation method, belonging to the field of drainage pipe technology. The rigid PVC drainage pipe of this invention, through a three-layer co-extrusion structure, possesses multiple advantages including lightweight, high strength, corrosion resistance, and aging resistance. Specifically, the inner layer contains a corrosion-resistant modifier composed of chlorinated polyethylene and acrylate copolymers, which improves the strength of the drainage pipe and the corrosion resistance of the inner wall. The core layer incorporates a foaming agent and a co-foaming agent to form a microporous structure, reducing the material density and overall weight of the pipe. The introduction of modified PVC, crosslinking agents, isocyanates, and acid anhydrides during processing forms an interpenetrating network or crosslinked structure, significantly improving the strength of the core layer material. The outer layer's preparation materials include an anti-aging agent composition consisting of hindered phenolic antioxidants, ultraviolet absorbers, and nano-inorganic anti-aging agents, effectively preventing the pipe from becoming brittle, discolored, and cracked during use, achieving a significant overall aging resistance effect.

The application discloses a special polyethylene isolation preservative film for rubber tires and a preparation method thereof, and belongs to the technical field of rubber tire manufacturing, and is used for solving the technical problem of poor self-repairing performance and ultraviolet resistance of the polyethylene isolation preservative film in the prior art, wherein the preparation method of the special polyethylene isolation preservative film for rubber tires comprises the following steps: an epoxy modified nano titanium dioxide is obtained through a grafting 2-(2,4-dihydroxyphenyl)-2H-benzotriazole reaction of the epoxy modified nano titanium dioxide and AABA; an intermediate I is obtained through a reaction of liponic acid and the modified nano titanium dioxide; the intermediate I, chlorinated polyethylene, N,N-dimethylformamide and potassium carbonate are uniformly mixed in an argon atmosphere, heated and reacted, filtered, washed and dried to obtain modified polyethylene; the prepared polyethylene isolation preservative film not only has good wear resistance and ultraviolet resistance, but also has certain self-repairing function, so that the service life of the film is prolonged, and the cost of the tire is reduced.

The invention discloses a high-performance and high-magnetism elastomer and a preparation method thereof.The elastomer adopts chlorinated polyethylene, magnetic powder, a reinforcing agent, a plasticizer, MgO and a coupling agent as raw materials, the raw materials are appropriate and reasonable in compatibility, the weight ratio of the content of the magnetic powder is 70-90%, and the flexibility and elasticity of the elastomer can be greatly improved; chlorinated polyethylene is adopted, regular arrangement of magnetic particles is facilitated, large magnetism can be displayed, the overall magnetic intensity is high and reaches 1000 GS or above, the magnetic induction intensity is larger than that of an existing magnetic elastomer, the requirements of industries such as the industry and health care products can be met, and the prepared elastomer is high in tensile force and good in fracture resistance; meanwhile, the elastomer does not need high-temperature vulcanization crosslinking, so that the energy loss is reduced, and the environmental pollution is reduced.

The invention discloses a preparation method of chlorinated polyethylene, which comprises the following specific steps: adding high-density polyethylene, an initiator and zirconium balls into ball milling equipment, and carrying out ball milling until the materials are uniformly mixed to obtain first mixed powder; pressurizing mixed gas of chlorine and nitrogen, introducing the pressurized mixed gas into ball milling equipment, heating the ball milling equipment to 70-90 DEG C, and carrying out ball milling on the first mixed powder to obtain second mixed powder; heating the ball milling equipment to 100-110 DEG C, and carrying out ball milling on the second mixed powder to obtain third mixed powder; heating the ball-milling equipment to 120-130 DEG C, performing ball-milling on the third mixed powder, stopping heating, stopping introducing chlorine gas after the temperature of the ball-milling equipment is cooled to room temperature, and removing chlorine gas in the ball-milling equipment by using nitrogen gas to obtain a chlorinated polyethylene crude product; and washing the chlorinated polyethylene crude product to be neutral by using sodium hydroxide alkali liquor, and drying in a drying oven to obtain chlorinated polyethylene. The chlorination degree and the chlorination uniformity of the product are improved through ball milling.

The invention belongs to the technical field of cable sheath materials, and particularly discloses a fireproof radio frequency cable for wireless communication and a preparation method thereof. The invention relates to a fireproof radio frequency cable for wireless communication, which comprises a copper core conductor, a ceramic fiber insulating layer, a copper strip embossing layer, a ceramic non-woven fabric layer, a steel strip wrapping layer, a high-temperature-resistant layer and a cable sheath, comprising the following raw materials: 50-60 parts of nitrile rubber, 22-25 parts of acrylate rubber, 13-16 parts of chlorinated polyethylene, 2-3 parts of a silane coupling agent, 17-19 parts of a composite reinforcing material, 1-2 parts of dioctyl sebacate, 1-3 parts of an antioxidant 1010, 5-8 parts of POE-g-GMA, 3-5 parts of a flame retardant and 2-4 parts of calcium stearate. The composite reinforcing material is composed of a silicon carbide compound, glass composite fibers and titanium dioxide. The durable, weather-proof and flame-retardant outer sheath is obtained, and is suitable for normal work in daily use and severe environments.

A new method for distinguishing chlorinated polyethylene (CPE) from chlorosulfonated polyethylene (CSM) by infrared spectrum is disclosed. Although the structures of CPE and CSM are similar, CPE has a special absorption peak at 1500-1520 cm ‑1 , while CSM contains S=O and SO2 groups, so it has a S=O stretching vibration absorption peak at 1350-1400 cm ‑1 , and a SO2 stretching vibration absorption peak at 1150-1200 cm ‑1 . By analyzing the spectral characteristics of the two polymers in the range of 1000-1400 cm ‑1 , the two polymers can be distinguished accurately.

The invention relates to the technical field of composite materials, in particular to a composite rubber material for damping products and a preparation method thereof.The composite rubber material is prepared from, by weight, 30-40 parts of chlorinated polyethylene rubber, 20-30 parts of fluororubber, 20-30 parts of chloroprene rubber, 10-15 parts of modified nano calcium carbonate, 3-5 parts of filler, 5-8 parts of compatibilizer, 2-4 parts of stearic acid and 3-4 parts of anti-aging agent. 1-3 parts of a flame retardant; the filling agent comprises calcium sulfate whiskers and fumed silica. According to the composite rubber material for the damping product, through matching and combination of the raw materials, the elasticity and aging resistance of the composite rubber material are improved, meanwhile, the composite rubber material has good flame retardance and wear resistance, the use efficiency of the composite rubber material is improved, and the application range is widened.

The invention relates to the technical field of power cables, and provides a corrosion-resistant low-voltage power cable and a preparation method thereof. A corrosion-resistant low-voltage power cable comprises a conductor, an insulating layer and a sheath layer which are sequentially arranged from inside to outside, and the sheath layer is prepared from, by weight, 100 parts of polyvinyl chloride, 8-10 parts of chlorinated polyethylene, 20-25 parts of plasticizer, 3-5 parts of stabilizer, 15-20 parts of filler, 1-1.5 parts of antioxidant and 1-1.5 parts of lubricant. The plasticizer is prepared from an aromatic carboxylic ester compound, triphenyl phosphate and polypropylene glycol adipate according to the mass ratio of (4 to 5) to 1 to 3. According to the technical scheme, the problem of insufficient corrosion resistance of the low-voltage power cable in the prior art is solved.

The invention relates to the technical field of high polymer materials, and particularly discloses a high-flame-retardant modified polyvinyl chloride cable material and a preparation method thereof.The high-flame-retardant modified polyvinyl chloride cable material is prepared from chlorinated polyvinyl chloride, a heat stabilizer, chlorinated polyethylene, nitrogen-phosphorus-bromine epoxy resin, ammonium polyphosphate, pentaerythritol, a synergist and a plasticizer; wherein the nitrogen-phosphorus-bromine epoxy resin is prepared by sequentially reacting brominated epoxy resin with a phosphoric acid-containing compound and a nitrogen-containing compound, and three flame-retardant elements of bromine, phosphorus and nitrogen are integrated into the same macromolecular skeleton through covalent bonds. According to the invention, the nitrogen-phosphorus-bromine epoxy resin is compounded with the molybdenum trioxide and the zinc-aluminum layered double hydroxides, so that a multi-synergistic mechanism of'gas-phase quenching-condensed-phase charring-thermal stabilization-smoke suppression 'is constructed, and the generation of toxic smoke is effectively inhibited while the excellent flame-retardant property is realized. The compatibility of all the components is good, and the obtained composite material has excellent mechanical properties and electrical insulation properties and remarkably improved thermal weight loss and aging-resistant stability.

The utility model discloses a material pressing system of a chlorinated polyethylene kettle. The material pressing system comprises the chlorinated polyethylene kettle and an intermediate tank, a conveying pipeline is connected between the discharge port of the chlorinated polyethylene kettle and the feed port of the middle tank; a slurry pump is mounted on the conveying pipeline and is provided with a frequency converter; the system further comprises a pressure sensor and a controller, and the pressure sensor is installed on the conveying pipeline between the slurry pump and the middle groove and used for monitoring the pressure of materials in the conveying pipeline in real time. The pressure sensor and the frequency converter are both electrically connected with the controller, and the controller adjusts the frequency of the frequency converter according to a pressure signal fed back by the pressure sensor so as to control the rotating speed of the slurry pump. According to the utility model, the safety coefficient of the material pressing process is obviously improved, and the condition that high-chlorine-content leather materials adhered to the gas phase part of the chlorination kettle easily fall off and enter slurry to form high-spot materials due to the use of instrument air is eliminated, so that the quality stability is kept.

This application relates to the field of polymer compound technology, specifically disclosing a method for preparing a high-weather-resistant chlorinated polyethylene rubber-plastic material and its application. The method includes the following steps: S1, Raw material preparation: High-density polyethylene, dispersant, emulsifier, and water are mixed in a specific ratio and then added to a reaction vessel and stirred until homogeneous; S2, Low-temperature initiation chlorination: Liquid chlorine is introduced into the reaction vessel, controlling the reaction temperature and pressure, and using a low flow rate to allow chlorine free radicals to enter the amorphous region edge of the high-density polyethylene; S3, Medium-temperature diffusion chlorination: The temperature is increased and the reaction vessel pressure is raised, controlling the chlorine introduction rate to allow chlorine atoms to diffuse towards the crystalline region edge of the high-density polyethylene; S4, High-temperature randomization chlorination; S5, Post-treatment purification. The material of this application can be used in outdoor building sealing strips, photovoltaic cable sheaths, automotive waterproof films, and weather-resistant conveyor belts, exhibiting excellent resistance to ultraviolet aging and thermo-oxidative aging.

The utility model relates to the technical field of drying equipment, and discloses a fluidized drying bed for producing chlorinated polyethylene, which comprises a supporting table, a device shell is mounted at the top of the supporting table, a motor frame is fixedly connected to the bottom of the inner wall of the device shell, and a rotating motor is fixedly connected to the inner side of the motor frame. And an output shaft of the rotating motor is fixedly connected with a rotating rod, an adjusting assembly is installed in the middle of the rotating rod, scraping assemblies are installed on the two sides of the adjusting assembly, and a support assembly is installed on the top of the inner side of the device shell. By arranging a rotating motor, a rotating rod, an adjusting assembly and a scraping assembly, the contact pressure between a scraping plate and the inner wall of the device shell can be adjusted, the scraping plate and the inner wall of the device shell are kept in a tight fit state all the time, and therefore the service life of the scraping plate is prolonged, and the practicability of the device is improved; and the distance between the two scraping plates is adjusted, so that the adjusting assembly and the scraping assembly are suitable for device shells with different diameters.