4151 results about "Foaming agent" patented technology

A fireproof magnesium oxide board is prepared by mixing the following raw materials, the raw material names and weight parts are as follows: 80-100 parts of magnesium oxide; 20-30 parts of anhydrous magnesium chloride; 10-20 parts of modified expanded vermiculite foaming agent; 20-30 parts of aluminum silicate fiber; 5-10 parts of sawdust; 10-15 parts of fly ash; 8-12 parts of glass magnesium board crushed powder; 1.5-5 parts of non-woven fabric; 10-20 parts of water; wherein the modified expanded vermiculite is prepared by the following steps: (1) Vermiculite is incompletely expanded and calcined; (2) acrylic acid monomer, sodium hydroxide, acrylamide monomer, initiator potassium persulfate, crosslinking aid pentaerythritol polyglycidyl ether, incompletely expanded vermiculite, and water are taken, stirred evenly and ultrasonically dispersed to obtain a first reaction solution, which is placed in a reactor for reaction to obtain a gel material; (3) the gel material is preliminarily crushed and dried, and then further crushed in a ball mill to obtain a fire-resistant expanded vermiculite with water absorption performance.

The invention discloses an embolism part for peripheral arteriovenous vessels, the embolism part comprises an anchoring part and a blocking part fixedly connected with the anchoring part, the blocking part adopts polyurethane shape memory foam, the expansion rate of the polyurethane shape memory foam is 50-100 times, and a preparation method of the polyurethane shape memory foam comprises the following steps: step 1, preparing a polyurethane shape memory foam material; the preparation method comprises the following steps: preparing a polyurethane acrylate prepolymer from macromolecular polyol, diisocyanate, a chain extender containing disulfide bonds, other micromolecular chain extenders and an acrylate end-capping reagent; and 2, uniformly mixing the polyurethane acrylate prepolymer, a foaming agent, a foaming promoter and a photoinitiator to obtain a foaming solution, and sequentially carrying out light curing and foaming on the foaming solution to obtain the polyurethane shape memory foam. According to the embolism part, the polyurethane shape memory foam is adopted as the blocking part, the blocking part applies radial acting force to the wall of the blood vessel all the time based on the expansion trend of the blocking part, and the blocking part and the anchoring part jointly act and can be stably maintained in the blood vessel.

The invention relates to the technical field of high polymer material processing, in particular to an insulation board extrusion molding control method and system.The method comprises the steps that 1, multi-dimensional parameters are collected in real time, at least three detection sections are arranged on an outlet section of a die head of an extruding machine in the material flowing direction, and each section synchronously collects the following data; 2, evaluating the rheological state of the melt in real time; 3, dynamically reconstructing a temperature field, dividing the die cavity into an axial independent temperature control section and a circumferential heating unit, and dynamically adjusting the power of the heating unit according to a state judgment result in the step 2; 4, pressure-rotating speed cooperative compensation is carried out; and 5, closed-loop verification is carried out, the density uniformity of the formed plate is detected after the adjustment instruction is executed, and if the density range exceeds the limit, the step 2 is executed again. By accurately controlling the temperature and the concentration of the foaming agent, the feasibility of high-proportion mixing of the reclaimed material is optimized, the quality fluctuation caused by temperature and viscosity fluctuation is reduced, and green manufacturing, energy conservation and consumption reduction are promoted.

The invention relates to the technical field of concrete, and particularly discloses ultralow-density foam concrete and a preparation method thereof. The ultralow-density foam concrete is prepared from the following raw materials in parts by weight: 35 to 60 parts of cement, 15 to 25 parts of steel slag, 8 to 15 parts of lightweight aggregate, 1 to 3 parts of reinforced fiber, 0.5 to 1 part of a foaming agent, 0.1 to 0.3 part of a stabilizer, 0.3 to 0.5 part of a foaming aid and 30 to 70 parts of water, the foaming aid is at least one of aluminum powder, silica fume, calcium stearate and triethanolamine, and the foaming agent is one of an animal protein foaming agent and a rosin foaming agent; the foaming agent and the foaming aid are combined, a stable foam structure is formed in a concrete system, meanwhile, the phenomena of foam merging and foam breaking are reduced, formation of communicating holes is reduced while the foam hole structure is refined, the stability of foam concrete bubbles is improved, and foam collapse is reduced.

The invention provides an axial anti-pulling water-blocking cable, and relates to the technical field of water-blocking cables, a cable core is spirally twisted on a central anti-pulling bearing unit, the central anti-pulling bearing unit is used for bearing main pulling force, and due to the winding mode of the cable core, when the cable core is subjected to pulling force, the cable core can be prevented from being damaged. The cable core can extrude the central tensile bearing unit towards the center so as to obtain a certain extension buffer space, so that the conductor is prevented from being broken, and the liquid foaming agent capsule in the central tensile bearing unit is extruded and broken by utilizing an extrusion force exceeding a limited value; therefore, the first foaming agent in the cable penetrates through the woven central tensile bearing unit to be combined with the second foaming agent in the twisting gap of the cable core, a large amount of foam colloid is generated, a high-stress area, where water leakage possibly occurs, of the cable is pressurized and subjected to leaking stoppage, and active response to water blocking according to local stress sudden change is achieved. Compared with a traditional passive water blocking technology, the response speed is higher, and the water blocking effect is better.

The invention relates to the field of adhesives, in particular to a structural adhesive epoxy composition and a preparation method thereof. The structural adhesive epoxy composition is prepared from the following raw materials: epoxy resin, a toughening agent, a reinforcing agent, filler, a latent curing agent, a latent accelerant, a chemical foaming agent, a physical foaming agent and the like. Finally, the epoxy composition prepared by the invention can be used as a structural adhesive raw material, has ultrahigh expansion rate, low-temperature rapid curing capacity and structural adhesive property, and also has good mechanical properties and excellent comprehensive application effect, so that the complex requirements of the application field of the prior art on the structural adhesive raw material are met.

The invention discloses an anti-shrinkage light, soft and elastic sole foaming material and a preparation method thereof, and belongs to the technical field of footwear products. The light, soft and elastic sole foaming material is formed by chemically foaming an EVA (Ethylene Vinyl Acetate) composite raw material, the EVA composite raw material is prepared from 50 to 70 parts of EVA, 20 to 40 parts of olefin thermoplastic elastomer, 10 to 20 parts of styrene elastomer, 1.5 to 3 parts of maleic anhydride grafted ethylene-octylene copolymer compatilizer, 0.4 to 0.8 part of peroxide cross-linking agent, 3 to 4 parts of foaming agent, 1 to 1.5 parts of zinc oxide, 1 to 1.5 parts of polyethylene wax substance and 0.5 to 1.5 parts of poly (butylene succinate). 0.3 to 1 part of polyamide 12 microspheres and 2 to 3 parts of nano montmorillonite. The foaming material can resist shrinkage when being used as a shoe sole part, and has good rebound performance and the like, so that the high-quality requirement of sneakers, the mass production stability and the like are met.

The invention belongs to the field of photovoltaic module recovery, and particularly relates to a method for recovering glass and silicon powder from a waste photovoltaic module. The method comprises the following steps: (S1) crushing the waste photovoltaic module, and mixing the obtained powder with water to form slurry; (S2) adjusting the pH value of the slurry to be alkaline to obtain alkaline slurry; (S3) the alkaline slurry is mixed with a collecting agent, an inhibitor and a foaming agent, then flotation separation is conducted, and coarse silicon powder and a glass foam layer are obtained; (S4) cleaning the coarse silicon powder to obtain a silicon powder product; and (S5) sequentially carrying out defoaming, solid-liquid separation and washing on the glass foam layer to obtain a glass product. By optimizing the slurry pH, flotation reagent combination, washing and other process conditions, the separation effect of the silicon powder and the glass powder is improved, the problem that separation is not thorough due to similar surface properties in a traditional physical separation method is solved, the reagent residual quantity on the surface of the silicon powder is reduced, and the subsequent purification cost is reduced.

The invention belongs to the technical field of water electrolysis hydrogen production diaphragms, and relates to coating slurry for a composite diaphragm in an alkaline electrolytic cell and a preparation method of the coating slurry. The coating slurry comprises a high-molecular polymer, an inorganic hydrophilic oxide, a polymer electrolyte, a pore-foaming agent and an organic solvent. The high-molecular polymer is polysulfone, and the inorganic hydrophilic oxide is titanium dioxide; and the polymer electrolyte is acacia gum. And the pore-foaming agent is polyvinylpyrrolidone. Titanium dioxide is used as a filler, so that the hydrophilicity of the hydrophobic polysulfone membrane can be improved, and the transfer of hydroxyl ions is facilitated. Hydroxyl, amino and other hydrophilic groups of the acacia gum are migrated to a membrane-water interface, and the groups and a membrane matrix are combined to form a hydrogen bond network, so that the stability and the water adsorption capacity of the membrane are enhanced, and the composite membrane with low surface resistance, smooth surface, compact coating and good mechanical capacity is obtained. The nylon and the acacia gum are adopted, cost is low, and large-scale production is facilitated.

The invention provides a sintered hollow batten for buildings and a preparation method, and belongs to the technical field of novel wall materials, the sintered hollow batten for buildings comprises the following raw materials: high-calcium fly ash, construction waste recycled aggregate, clay, sulphoaluminate cement, a foaming agent, reinforced fibers and an additive; wherein the particle size of the construction waste recycled aggregate is 0.5-5mm, and the construction waste recycled aggregate is subjected to plasma activation treatment; a nano TiO2 photocatalytic coating is loaded on the surface of the construction waste recycled aggregate; the reinforced fibers are composite fibers of basalt fibers and polypropylene fibers, and the mass ratio of the basalt fibers to the polypropylene fibers is (1: 1)-(1: 2). According to the sintered hollow batten for the building, the building waste recycled aggregate subjected to plasma activation treatment is adopted, and the nano titanium dioxide photocatalytic coating is loaded, so that the bonding strength of the aggregate is greatly improved, and the hollow batten is endowed with the function of degrading pollutants such as formaldehyde.

The invention discloses a low-temperature-resistant hydrolysis-resistant polyurethane protector material and a preparation method thereof. The low-temperature-resistant hydrolysis-resistant polyurethane protector material is prepared from a component A and a component B through cross-linking and curing, wherein the component A is prepared from polyether polyol, bifunctional hydroxyl-terminated polysiloxane, modified polyborosiloxane, a cross-linking agent, a chain extender, a foaming agent, a foam stabilizer, a catalyst and a pore opening agent, and the component B is isocyanate. The protective clothing prepared from the material has excellent buffer energy absorption performance, low temperature resistance and hydrolysis resistance, and meets the use requirements in extremely cold weather.

The invention relates to the technical field of coatings, and discloses a wear-resistant waterborne polyurethane finish paint and a preparation method thereof. The wear-resistant waterborne polyurethane finish paint comprises a component A and a component B in a mass ratio of (4-7): 1, the component A is prepared from the following components in parts by mass: 50 to 60 parts of waterborne polyurethane, 10 to 15 parts of hyperbranched polysiloxane, 2 to 3 parts of polyoxyethylene fatty acid, 0.8 to 1.2 parts of a de-foaming agent, 6 to 8 parts of color paste and 10 to 15 parts of water; and the component B comprises an isocyanate curing agent. The wear-resistant waterborne polyurethane finish paint prepared in the invention has excellent adhesion strength and wear resistance.

The invention discloses a thermoplastic elastomer POE open-cell foam material and a preparation method thereof. The thermoplastic elastomer POE open-cell foam material comprises the following components in percentage by mass: 60.0%-90.0% of a thermoplastic elastomer POE base material, 5.0%-20.0% of a second component, 3.0%-10.0% of a fiber functional filler, 1.5%-3.0% of a compatilizer, 0.2%-2.0% of a cross-linking agent, 0.2%-2.0% of a foam stabilizer and 0.1%-3.0% of a composite foaming agent. The composite foaming material is prepared by adopting continuous extrusion physical foaming, wherein the composite foaming agent is injected in stages in the extrusion process to realize controllable foaming. The obtained foam is high-performance foam with the aperture ratio being greater than or equal to 93%, the foaming ratio being 20-25 times, the uniform foam hole size being 150-200 microns, the adsorption performance being greater than or equal to 30 g / g, the compression rebound rate being greater than or equal to 93% and the shrinkage rate being smaller than or equal to 3%, and the application range of the POE foam material in the field of environmental protection is widened.

The invention relates to the technical field of building decoration materials, in particular to a high-performance antibacterial mildew-proof sealant and a preparation method thereof. The sealant is prepared from the following raw materials in parts by weight: 20 to 30 parts of silane modified polyurethane, 40 to 50 parts of nano calcium carbonate, 20 to 30 parts of a plasticizer, 3 to 7 parts of a hydroxyl silane coupling agent, 0.4 to 0.8 part of a mildew preventive, 0.3 to 0.7 part of an ultraviolet light absorber, 0.3 to 0.7 part of a de-foaming agent and 0.8 to 1.2 parts of a first catalyst. The high-performance antibacterial and mildew-proof sealant has long-acting antibacterial and mildew-proof performance, and excellent mechanical performance and weather resistance of the sealant can be maintained, so that the requirements of industries such as building, medical treatment and food processing on high-performance, healthy and environment-friendly sealing materials are met; and the preparation method is simple and controllable, the production cost is relatively low, and large-scale production can be realized.

The invention relates to the technical field of building materials, and particularly discloses a slag and ardealite synergetic activated gypsum batten and a preparation method thereof.The slag and ardealite synergetic activated gypsum batten comprises pretreated ardealite, superfine slag powder, a composite exciting agent, reinforced fibers, self-repairing microcapsules, a foaming agent and water, and the composite exciting agent is formed by compounding nano SiO2, CaO and metakaolin; the preparation method comprises the following steps: mixing nano silica sol and a lignin solution, performing spray drying, and performing heat treatment to obtain the self-repairing microcapsule; the preparation method comprises the following steps: carrying out dry mixing on pretreated phosphogypsum, superfine slag powder and a composite exciting agent, adding water, adding reinforced fibers, self-repairing microcapsules and a foaming agent, stirring to form slurry, carrying out injection molding on the slurry, and carrying out stepped maintenance of pre-maintenance, main maintenance and carbonization treatment to prepare the modified red mud-pretreated phosphogypsum-based self-repairing self-repairing composite phosphogypsum-based self-repairing self-repairing composite phosphogypsum-based self-repairing composite phosphogypsum-based self-repairing composite phosphogypsum-based self-repairing composite phosphogypsum. The composite excitant synergistically activates the activity of the slag, and is matched with the reinforced fibers, the self-repairing microcapsules and stepped curing, so that solid waste resource utilization is realized, the compression resistance, bending resistance and impact resistance of the batten are improved, and the environment-friendly and high-performance effects are achieved.

The invention relates to the field of plastic films, and particularly discloses a bio-based antibacterial cool-feeling breathable film and a preparation method thereof. The bio-based antibacterial cool-feeling breathable film is prepared from the following raw materials in percentage by weight: 49 to 66.5 percent of matrix resin, 30 to 40 percent of pore-foaming agent, 1 to 3 percent of silane modified cellulose nanofiber, 1 to 2 percent of antibacterial agent, 1 to 5 percent of composite cool-feeling agent and 0.5 to 1 percent of auxiliary agent, the matrix resin comprises PBAT resin and PLA resin in a mass ratio of (7: 3)-(5: 5); the composite cool feeling agent comprises nano aluminum nitride and graphene in a mass ratio of (5-15): 1. The bio-based antibacterial cool-feeling breathable film can be used for medical dressings, disposable medical supplies, mother and baby products and the like, and has the advantages of being good in breathability and moisture penetrability, high in antibacterial capacity, lasting in antibacterial effect, high in mechanical strength, high in cool-feeling coefficient, comfortable to wear and not prone to stuffiness.

The invention relates to the field of foaming materials, in particular to a low-solvent-residue expandable polystyrene material and a preparation method thereof. The expandable polystyrene material with low solvent residue comprises the following raw materials in percentage by weight: 0.35-0.45% of a free radical initiation system, 0.35-0.45% of S, S, S, S, S, S, S, S, S, S, S, S, S, S, S According to the present invention, the material comprises, by weight, 0.1-0.15% of S, S '-bis (alpha, alpha'-dimethyl-alpha ''-acetoxy) trithiocarbonate, 0.15-0.2% of ascorbic acid, 0.1-0.2% of a nucleating agent, 0.2-0.3% of a suspending agent, 0.001-0.003% of an emulsifier, 5-6% of a foaming agent, 0.15-0.25% of a plasticizer, 0.001-0.002% of hydroxyethyl cellulose, 0.05% of sodium phosphate, 0.1-0.2% of zinc stearate, and 0.1-0.2% of glyceryl stearate, the obtained material has low solvent residue, meets food safety requirements, and is suitable for food packaging.

The invention relates to the technical field of high polymer material processing, and particularly discloses a polyethylene rotational plastic-gradient density-based lightweight hollow product and a method thereof.The polyethylene rotational plastic-gradient density-based lightweight hollow product is prepared from high-density polyethylene, linear low-density polyethylene, nano-silica, carbon nanotubes, a flexibilizer, PE wax and an antioxidant through blending, granulation and grinding; placing the powder in a mold, heating, melting and spinning to form an outer high-density enhancement layer; the preparation method comprises the following steps: blending low-density polyethylene, high-density polyethylene, a microcapsule foaming agent, a compatibilizer and an antioxidant, granulating and grinding; the powder is placed in a mold to continue to be heated and rotated till fusion is completed; cooling to trigger the microcapsule foaming agent to decompose, and reducing the rotating speed until an inner low-density foaming layer is formed on the inner wall of the outer high-density enhancement layer; and performing water-cooling on the outer-layer step, and performing air-cooling on the inner-layer step to obtain a light-weight hollow finished product. The multifunctional requirements for light weight, high strength and heat insulation can be met at the same time, and densification, foaming and gradient curing are completed in a single period.

The present invention relates to a method of making a PHA (polyhydroxyalkanoate) coated fiber-based substrate, the method comprising the steps of: a) providing a fiber-based substrate having a first major surface and a second major surface; b) forming a first PHA layer by applying a foamed first aqueous coating composition comprising a first PHA and a blowing agent on the first major surface and drying the foamed first aqueous coating composition, wherein the foamed first aqueous coating composition is a foam having a foam density of 0.75 g / cm3 or less; c) forming a second PHA layer by applying a second aqueous coating composition comprising a second PHA on the first PHA layer and drying the second aqueous coating composition The invention also relates to a PHA coated fiber-based substrate and a packaging container comprising a PHA coated fiber-based substrate.

Disclosed in the present invention are a reinforced polyurethane rigid foam material and a preparation method therefor, belonging to the technical field of high polymer materials. The material comprises: 5-10 parts of glass fiber yarn, 40-60 parts of an aromatic polyether polyol, 30-50 parts of an aromatic polyester polyol, 30-50 parts of toluene diisocyanate, 40-60 parts of polymethylene polyphenyl polyisocyanate, 5-10 parts of a flame retardant, 5-15 parts of a foaming agent, 1-5 parts of a catalyst and 1-5 parts of a surfactant. The present invention can achieve continuous production of the reinforced polyurethane rigid foam material and can improve the tensile property of the material by 20% or above and increase the utilization rate of glass fibers by 5% or above. The reinforced polyurethane rigid foam material can be widely applied to the field of liquefied gas storage and transportation.

The invention relates to the field of new energy battery buffer parts, in particular to an anti-static foaming silica gel buffer part for a new energy battery and a preparation method of the anti-static foaming silica gel buffer part. The anti-static foaming silica gel buffer part is prepared by mixing and foaming anti-static mixed rubber, a foaming agent, hydrogen-containing silicone oil, an inhibitor and a platinum catalyst, the anti-static rubber compound is prepared from the following raw materials in percentage by weight: 37-50% of methyl vinyl silicone rubber raw rubber, 38-45% of white carbon black, 8-15% of anti-static filler and 1-3% of hydroxyl silicone oil; the antistatic filler is composed of an antistatic agent and a silane-containing active agent; the antistatic agent is composed of acetylene carbon black and a single-walled carbon nanotube. Under the action of the silane-containing active agent, the acetylene carbon black and the single-walled carbon nanotubes are interwoven to form a stable supporting antistatic skeleton structure, so that static electricity can be effectively conducted, static electricity accumulation is avoided, the structure is kept stable in long-term use, and the compression resilience and antistatic durability of the buffer part are ensured.

The invention relates to a special engineering plastic polyethersulfone microcellular foam material and a preparation method thereof, belongs to the technical field of high polymer material foaming, and solves the problem that high foaming ratio, a microcellular structure and excellent mechanical properties cannot be simultaneously obtained when a macromolecular polyethersulfone material adopts an injection foaming technology in the prior art. The method comprises the following steps: step 1, pretreating raw materials; 2, melt blending: mixing the PES base material, the second component, the functional filler, the cross-linking agent and the foam stabilizer, carrying out melt blending, granulating, and drying to obtain granules; 3, injection foaming: injecting the granules into an injection machine, adding a composite foaming agent into the injection machine, mixing, and performing injection foaming molding to obtain an injection-molded foaming material; and 4, curing: irradiating the injection-molded foam material with rays to obtain the special engineering plastic PES microcellular foam material.

The invention provides an ultralight high-resilience cushioning transparent EVA composite chemical foaming material. The ultralight high-resilience cushioning transparent EVA composite chemical foaming material is prepared from the following raw materials in parts by mass: 30-60 parts of high-transparency modified TPX, 30-50 parts of an ethylene-vinyl acetate copolymer, 7-25 parts of a thermoplastic elastomer TPE, 5-16 parts of an olefin block copolymer, 5-10 parts of a wear-resistant agent, 0.2-0.5 part of stearic acid, 0.2-1 part of zinc stearate, 0.3-1.5 parts of an odorless bridging agent and 3.5-8 parts of a transparent foaming agent, the high-transparency modified TPX is prepared from high-transparency TPX, EVOH, ethylene propylene diene monomer and stearic acid. The EVA composite chemical foaming material provided by the invention has the advantages of ultralight weight, low shock absorption, high resilience, high transparency and high energy feedback, keeps the wearing comfort of shoes, protects a consumer from fatigue, pain and even injury caused by the material shock absorption problem in the exercise process, is high in cost performance, and meets the comprehensive requirements of the consumer.

The invention belongs to the field of foamed plastic molding, and provides a foamed polymer preparation device which comprises a mold, a pipeline is connected to the mold, the pipeline is configured to introduce foamed particles, steam and a cooling medium into the mold and discharge gas / condensate water from the mold, and a valve is arranged in the pipeline; wherein the foaming particles are formed by pre-foaming a raw material containing a physical foaming agent; the temperature sensor is configured to measure the temperature of more than one position in the mold and / or the pipeline; the pressure sensor is configured to measure the pressure of more than one position in the mold and / or the pipeline; the image acquisition mechanism is configured to shoot the interior of the mold to judge the fusion state of the foaming particles; and the controller is configured to receive data of the temperature sensor, the pressure sensor and the image acquisition mechanism and generate an instruction for opening / closing the valve, and a calculation unit is further arranged in the controller. The invention also provides a corresponding preparation method of the foamed polymer. And the technological process can be controlled more accurately and automatically.

The invention relates to solid waste-based self-excitation foam concrete which is characterized by comprising the following raw materials in parts by mass: 1-2 parts of a composite foaming agent, 40-60 parts of a composite precursor, 40-60 parts of an alkaline excitation material, 0.1-0.2 part of polypropylene fiber and water, and the mass ratio of water to glue is 0.45-0.55. The mineral activity of the waste incineration bottom slag, the fly ash and the granulated blast furnace slag powder is excited through the solid waste-based alkaline exciting agent, the compressive strength of the material is remarkably improved by adding the polypropylene fiber, the dry density and the heat conductivity coefficient meet expected requirements, the cost is saved, energy is saved, the environment is protected, and a new direction is provided for recycling application of industrial solid waste.

The invention provides a method for making foam slag in LF (ladle furnace) refining by using a waste graphite electrode, which specifically comprises the following steps: grinding the waste graphite electrode to obtain graphite electrode powder, and adding limestone as a foaming agent in the LF refining. 0-1.25 kg / t of steel limestone is added firstly, and 0.018-0.19 kg / t of steel graphite electrode powder is added every 2 min. Compared with the prior art, by utilizing the characteristics of high carbon content, high conductivity and low sulfur of the graphite electrode, the invention aims to realize submerged arc heating, reduce power consumption and shorten refining time so as to meet the requirement of continuously increasing LF smelting indexes under the high-quality development trend of steelmaking.

The invention relates to the technical field of production of expandable polystyrene (EPS) beads, and discloses a production process of EPS beads, which comprises the following steps: preparing styrene monomer, deionized water, foaming agent, initiator, dispersing agent and stabilizer raw materials, accurately weighing various raw materials according to the production process and product requirements, and uniformly mixing according to a certain ratio to obtain the EPS beads. The preparation method comprises the following steps: sequentially adding the prepared raw materials into a reaction kettle, firstly adding deionized water, then quantitatively adding a styrene monomer, starting a stirrer, then sequentially adding auxiliaries such as an initiator, a dispersing agent and a stabilizer, and continuously stirring and uniformly mixing to carry out polymerization reaction. According to the present invention, the modern expandable polystyrene bead production process mostly adopts the automatic production line, the continuous and stable production can be achieved, the production efficiency is improved, the styrene monomer, the initiator and the foaming agent are simultaneously added into the reaction kettle in the new preparation production process, the production process is simplified, the production links are reduced, and the production cost is reduced. Therefore, the production efficiency is further improved.

The invention discloses lightweight energy-saving fireproof soil-based foam lightweight soil, which is prepared from the following raw materials in parts by weight: 20 to 30 parts of magnesium slag powder, 20 to 30 parts of granulated blast furnace slag powder, 15 to 25 parts of iron tailing powder, 40 parts of soil, 6 parts of water glass, 10 parts of desulfurized gypsum, 0.28 to 0.43 part of polycarboxylate superplasticizer, 57 to 75 parts of water, 0.76 to 1.00 parts of AOS foaming agent, 0.16 to 0.26 part of HPMC foam stabilizer and 0.16 to 0.26 part of calcium stearate foam stabilizer. The preparation method comprises the following steps: 1, mixing and stirring dry powder; 2, preparing slurry; 3, preparing soil-based foam light soil; and 4, molding and curing in a mold. According to the invention, a three-dimensional skeleton dense structure is constructed by optimizing the composition and proportion of the raw materials, the soil-based foam light soil with low heat conductivity, low density and high strength is obtained, and the soil-based foam light soil is suitable for the fields of roof heat preservation, wall body, roadbed filling, abutment back, foundation pit, pipeline backfilling and landscape engineering.

The invention belongs to the technical field of thermoplastic elastomer-based electromagnetic shielding foaming materials, and provides a thermoplastic elastomer-based foaming composite material with excellent conductivity and electromagnetic shielding performance and a preparation method of the thermoplastic elastomer-based foaming composite material. The foaming composite material is prepared by fully mixing the following components in parts by weight through an extruder, extruding, foaming and molding: 100 parts of thermoplastic elastomer resin, 0.8-8 parts of conductive functional filler, 0.1-10 parts of a coupling agent, 0.1-10 parts of a photoinitiator, 0.1-10 parts of a foam stabilizer and 0.2-8 parts of a composite foaming agent. The thermoplastic elastomer-based foaming composite material has excellent conductivity and electromagnetic shielding performance, also has good mechanical properties, is highly continuous and stable in production process, is safe and free of environmental pollution, and is suitable for industrial large-scale production.