822 results about "Calcium stearate" patented technology

The invention discloses an environment-friendly calcium-zinc composite heat stabilizer and a preparation method thereof, and relates to the technical field of heat stabilizers. The environment-friendly calcium-zinc composite heat stabilizer is prepared from the following raw materials in parts by mass: 10-20 parts of zinc stearate, 20-30 parts of calcium stearate, 10-15 parts of an auxiliary stabilizer, 5-8 parts of a plasticizer, 1-5 parts of an antioxidant and 2-5 parts of filler, wherein the auxiliary stabilizer is a mixture of beta-diketone, modified organic acid intercalated hydrotalcite and modified silicon dioxide; the modified organic acid intercalated hydrotalcite is obtained by splitting expanded vermiculite, adding zinc and lanthanum compounds, coprecipitating with organic acid, and adding a modifier; the modified silicon dioxide is obtained by adding a coupling agent into a solid substance obtained by splitting expanded vermiculite for modification and carrying out a series of chemical reactions with maleic anhydride and pentaerythritol. PVC plastic prepared by adding the calcium-zinc composite stabilizer into PVC paste resin and resin powder has good thermal stability.

The invention relates to the technical field of polypropylene plastics, in particular to a high-strength antibacterial polypropylene plastic and a preparation method thereof. The antibacterial polypropylene material comprises the following components in parts by weight: 60-80 parts of polypropylene resin, 5-15 parts of nano titanium dioxide and nano zinc oxide composite particles modified by a special organosilicon polymer, 3-8 parts of an antibacterial agent compounded by quaternary ammonium salt and bioactive peptide, 5-10 parts of a core-shell structure MBS toughening agent and 0.5-2 parts of a hindered phenol-thioether composite antioxidant. 1-3 parts of a calcium stearate processing aid; and 3-8 parts of dopamine modified chopped carbon fibers. The composite material is high in strength, tensile strength, bending strength and impact strength are remarkably improved, and larger external force can be borne; the antibacterial performance is excellent, and the antibacterial rate reaches 95%-99%; the preparation process is environment-friendly and efficient, and the product is good in stability and recoverable; product safety can be guaranteed, the service life is prolonged, and economic and social benefits are good.

The invention relates to the technical field of composite film preparation, in particular to a multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film and a preparation method thereof.The multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film comprises a base material layer, a gas barrier layer, a bonding transition layer and a nano ceramic functional coating; the base material layer comprises the following components in parts by mass: 80-100 parts of biaxially oriented polypropylene; 20 to 30 parts of metallocene linear low density polyethylene; 5 to 8 parts of nano titanium dioxide; 0.5 to 1 part of beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid; and 0.3 to 0.6 part of calcium stearate. Through the multi-layer co-extrusion and gradient curing technology and the five-layer co-extrusion technology, it is ensured that the thickness of a base film is uniform and interlayer bonding is firm, the adhesive force of the coating is enhanced through plasma surface treatment, and activity retention and uniform distribution of functional components are guaranteed through the segmented curing strategy of the nano ceramic coating; compared with a traditional hot-pressing compounding or solvent coating process of the composite film, the energy consumption and the solvent residue risk are greatly reduced, meanwhile, the production efficiency and the product consistency are improved, and large-scale application is provided for medicine packaging.

The invention discloses a high-strength polyethylene film and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a high-strength polyethylene film. The high-density polyethylene composite material is prepared from the following raw materials in parts by weight: 35 to 45 parts of high-density polyethylene, 25 to 35 parts of linear low-density polyethylene, 12 to 18 parts of ethylene-vinyl acetate copolymer, 5 to 10 parts of nano silicon dioxide, 3 to 7 parts of organic montmorillonite, 1.5 to 3.5 parts of hindered amine light stabilizer, 1.5 to 2.5 parts of antioxidant 1010, 0.8 to 1.2 parts of calcium stearate, 0.8 to 1.2 parts of zinc stearate, 0.8 to 1.2 parts of silane coupling agent and 4 to 6 parts of maleic anhydride grafted polyethylene. The composite material is prepared from the following components in parts by weight: 1.5-3.5 parts of a quaternized chitosan-nano silver compound, 6-9 parts of a modified toughening agent, 4-7 parts of a modified heat-resistant agent, 1.5-3.5 parts of a processing aid, 0.15-0.35 part of dibenzoyl peroxide and 0.5-1.5 parts of a nucleating agent DBS. The composite material is excellent in comprehensive performance, high in strength, good in flexibility and puncture resistance, excellent in aging resistance, heat resistance, chemical resistance and antibacterial property, good in processability, capable of meeting the requirements of multiple fields such as packaging and agriculture, scientific in preparation method and high in practical value.

The present invention relates to the technical field of regenerated plastics, and in particular relates to a flame-retardant regenerated plastic and a preparation method therefor. The regenerated plastic comprises the following specific components: 90-100 parts of regenerated high-density polyethylene, 5-10 parts of high-density polyethylene, 1-2 parts of calcium stearate, 1-2 parts of carbon black, 8-12 parts of maleic-anhydride-grafted polyethylene, 2-3 parts of an antioxidant, and 6-8 parts of a polyurethane elastomer. The regenerated high-density polyethylene is used as a main material, the high-density polyethylene is added thereto, the maleic-anhydride-grafted polyethylene is used as a compatibilizer, and then polyhydroxy polybutadiene, epoxidized hydroxyl-terminated polybutadiene and polypropylene oxide glycol are compounded and react with diphenylmethane diisocyanate to generate a polyurethane elastomer, thereby toughening the regenerated polyethylene; moreover, a flame-retardant effect is achieved by means of the synergy of phosphorus and nitrogen; therefore, a regenerated polyethylene plastic with high tensile strength and good flame-retardant performance is prepared. The regenerated plastic can be widely used in a plurality of fields, and has a relatively high level of practicability.

The invention relates to the technical field of cables, and provides a fireproof flame-retardant 10kV power cable and a preparation method thereof. The fire-resistant flame-retardant 10kV power cable comprises a conductor and a fire-resistant flame-retardant layer, the fireproof flame-retardant layer is prepared from the following raw materials in parts by weight: 35 to 45 parts of linear low-density polyethylene, 40 to 50 parts of ethylene-vinyl acetate copolymer, 25 to 30 parts of modified aluminum hydroxide, 5 to 8 parts of polyethylene grafted maleic anhydride, 10 to 12 parts of phosphate modified halloysite nanotube, 5 to 8 parts of ZIF-8 loaded zinc borate core-shell particles, 15 to 20 parts of magnesium hydroxide and 2 to 3 parts of silane coupling agent. 0.5 to 1 part of antioxidant, 0.5 to 1 part of calcium stearate and 1 to 1.5 parts of polyethylene wax. According to the cable prepared in the invention, the situation that a conductor is exposed and the fire resistance is lost due to cracking and falling under long-time high-temperature baking is avoided; the continuous effectiveness of the flame retardant at high temperature is improved.

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 belongs to the field of building decoration materials, and discloses a GRG gypsum composite reinforced material and a preparation method thereof. The high-strength concrete is prepared from the following components in parts by weight: 45 to 65 parts of alpha-semi-hydrated gypsum, 12 to 20 parts of composite reinforced fiber, 0.5 to 2 parts of graphene nanofiber, 2 to 5 parts of nano silica fume, 5 to 10 parts of ethylene-vinyl acetate copolymer latex powder, 1 to 2.5 parts of hydroxypropyl methyl cellulose, 0.1 to 0.8 part of polycarboxylic acid type water reducing agent, 1 to 4 parts of calcium stearate, 3 to 8 parts of vermiculite powder and 28 to 40 parts of deionized water. Aiming at the problems that an existing GRG material is insufficient in mechanical property, low in fireproof grade, poor in thermal performance, poor in durability and the like, a multi-dimensional synergistic enhancement system is constructed by adopting composite reinforced fibers, functional nanofiller and a gradient preparation process, the problems of dispersion and interfacial compatibility of the nanofiller are solved, and the comprehensive performance of the GRG material is improved. The performance breakthrough of high strength, high fire resistance, low heat conduction and long durability is realized.

The invention belongs to the field of green low-zero-carbon building materials, and provides a CO2 foam concrete material based on a solid waste-based multi-component gel system and a preparation method thereof, the CO2 foam concrete material comprises the following components by mass: 20%-42% of solid waste-based sulphoaluminate cement, 15%-60% of semi-hydrated gypsum, 6%-15% of Portland cement, 0-20% of mineral powder, and 2%-4% of sodium bicarbonate, the concrete admixture comprises the following raw materials in percentage by weight: 3%-6% of aluminum potassium sulfate, 0.2%-0.4% of a retarder, 0.02%-0.2% of a water reducing agent and 0.02%-0.06% of calcium stearate, and the sum of the percentages of all the raw materials is 100%. On the basis of ensuring that the foam concrete meets the strength requirement, the apparent density is obviously reduced; the compound system formed by the solid waste-based sulphoaluminate cement, the Portland cement and the semi-hydrated gypsum obviously improves the mechanical property of the carbon dioxide foam concrete and greatly improves the mechanical property of the carbon dioxide foam concrete.

The invention relates to the technical field of fan shell materials, in particular to an antibacterial PP (polypropylene) fan shell material and a preparation method thereof. The polypropylene composite material is prepared from the following components in parts by weight: 80 to 90 parts of polypropylene composite material, 1 to 3 parts of polyethylene glycol grafted maleic anhydride, 1 to 5 parts of modified lignin, 8 to 15 parts of nano modified montmorillonite, 1 to 4 parts of silver nitrate, 1 to 3 parts of coupling agent KH550, 0.1 to 0.5 part of calcium stearate and 0.3 to 0.6 part of antioxidant, through double modification of lignin and three-step modification of montmorillonite, the dispersity and interface bonding strength of the filler are remarkably improved, the tensile strength of the material is improved by 37% or above, and meanwhile good toughness is kept; a multi-component synergistic system realizes the persistence of the antibacterial performance, and the antibacterial efficiency of 95% or above is still kept after 7 days. Thirdly, through the synergistic effect of the modified lignin and the nano-montmorillonite, the thermal stability of the material is remarkably improved, and the initial degradation temperature is increased by 20-35 DEG C.

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

The invention relates to the technical field of cables, and provides an anti-aging insulated power cable. A conductor layer and an anti-aging outer sheath layer are sequentially arranged from inside to outside. The anti-aging outer sheath layer is prepared from the following raw materials in parts by weight: 55 to 65 parts of PVC (Polyvinyl Chloride) resin, 20 to 30 parts of ethylene propylene diene monomer, 10 to 15 parts of ethylene-vinyl acetate copolymer, 10 to 12 parts of modified kaolin, 18 to 20 parts of diisononyl phthalate, 4 to 5 parts of calcium-zinc composite stabilizer, 1.5 to 2 parts of antioxidant, 0.5 to 1 part of polyethylene wax and 0.5 to 0.7 part of calcium stearate; the modified kaolin is obtained by coating the surface of kaolin with nano silicon dioxide to obtain SiO2-coated kaolin and grafting the SiO2-coated kaolin with an ultraviolet absorbent. According to the anti-aging insulated power cable prepared in the invention, the problem that the ultraviolet absorbent may be decomposed, volatilized or migrated to fail in long-term use is solved, and the anti-aging stability of the insulating material in long-term operation is improved.

The invention relates to an active and passive integrated fireproof insulation board and a preparation method thereof. The active and passive integrated fireproof insulation board comprises n passive fireproof layers and n or n + 1 active fireproof layers, the passive fireproof layer and the active fireproof layer are laminated into a whole; the passive fireproof layer comprises inorganic fiber felt and aerogel; the aerogel is obtained by curing an adhesive aerogel stock solution, and the stock solution comprises the following components in parts by mass: 1000-4000 parts of silica sol, 50-150 parts of silicate, 10-50 parts of a phosphate adhesive, 5-20 parts of quick lime, 5-50 parts of titanium dioxide, 10-50 parts of calcium stearate, 5-50 parts of a hydrophobic modifier, 5-50 parts of an acid-base regulator and 1000-4000 parts of a solvent; the active fireproof layer is at least one of inorganic fireproof plates such as a gypsum fireproof plate and the like which can actively consume energy after being heated and decomposed. The problems that an existing fireproof insulation board is high in organic matter content, poor in flame retardance and high in hygroscopicity, and the thermal insulation performance and safety are obviously reduced after the fireproof insulation board is used are solved.

The invention relates to the technical field of sealing strips, in particular to an anti-aging ethylene propylene diene monomer rubber sealing strip and a preparation method thereof. Comprising the following components in parts by weight: 150-180 parts of ethylene propylene diene monomer, 60-90 parts of carbon black, 8-12 parts of white carbon black, 3-8 parts of a peroxide vulcanizing agent, 6-12 parts of zinc oxide, 12-16 parts of magnesium-aluminum hydrotalcite, 10-18 parts of a plasticizer, 1-3 parts of a crosslinking aid, 1-3 parts of calcium stearate, 1-3 parts of an anti-aging agent and 1-3 parts of a silane coupling agent. The anti-aging agent is a mixture of an anti-aging agent AN245 and an anti-aging agent MBZ. By adding the anti-aging agent, the aging resistance of the ethylene propylene diene monomer can be remarkably improved by inhibiting oxidation and delaying the aging process, a high-crosslinking-density three-dimensional network is formed through the peroxide vulcanizing agent, breakage of molecular chains at high temperature is reduced, thermal aging is delayed, and the ethylene propylene diene monomer sealing strip with excellent aging resistance is prepared.

The invention relates to the technical field of cables, and provides a flame-retardant medium-voltage power cable and a preparation method thereof. The flame-retardant medium-voltage power cable comprises a conductor and a flame-retardant layer, the flame-retardant layer is prepared from the following raw materials in parts by weight: 65 to 75 parts of ethylene-vinyl acetate copolymer, 25 to 35 parts of polyolefin elastomer, 10 to 12 parts of maleic anhydride grafted polyethylene, 10 to 14 parts of phosphorus-nitrogen modified wollastonite, 8 to 10 parts of polydopamine / silane double-layer modified magnesium hydroxide, 3 to 5 parts of nano zinc borate, 0.6 to 1 part of antioxidant and 0.5 to 0.7 part of calcium stearate. According to the flame-retardant medium-voltage power cable prepared in the invention, the flame-retardant performance is improved, and the flame-retardant stability of the cable is also 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 discloses an HPVC power cable protection pipe and a preparation method thereof, and relates to the technical field of cable protection pipes. The HPVC power cable protection tube is at least prepared from the following raw materials in parts by weight: 100 parts of high-strength polyvinyl chloride, 35 to 45 parts of epoxy acrylate rubber, 5 to 8 parts of vinyl chloride-g-acrylate copolymer, 8 to 12 parts of epoxidized soybean oil, 3 to 5 parts of calcium-zinc composite stabilizer, 5 to 15 parts of modified hydrotalcite, 0.1 to 0.5 part of beta-diketone, 0.8 to 1.5 parts of calcium stearate and 10 to 20 parts of flame retardant. 12 to 15 parts of modified nano calcium carbonate, 5 to 8 parts of talcum powder, 0.6 to 1.2 parts of antioxidant, 1 to 2 parts of anti-aging agent 4010 and 0.5 to 1.5 parts of ultraviolet light absorber UV531; the modified hydrotalcite is obtained by adding a mixed solution of calcium nitrate and lanthanum nitrate, a sodium hydroxide solution and a sodium bicarbonate solution into a lauryl sodium sulfate solution, mixing and aging, and then carrying out a post-treatment process. The HPVC power cable protection tube prepared by the invention has relatively high strength, good mechanical properties, weather resistance and cold resistance, and long service life.

The invention discloses a low-odor soft TPE (thermoplastic elastomer) composite material and a preparation method thereof, and the composite material comprises the following components in parts by weight: 50-100 parts of TPE, 5-20 parts of a deodorant, 150-600 parts of a plasticizer, 1-10 parts of an antioxidant, 1-5 parts of a light stabilizer, 0-20 parts of calcium stearate, 2-10 parts of nano silicon dioxide, 1-5 parts of an organic silicon modifier and 50-150 parts of a bio-based plasticizer. 1-5 parts of nano titanium dioxide, 0.1-1 part of graphene nanosheets and 1-5 parts of a metal organic framework compound; 0.01-0.5 part of carbon nanotubes, 0.5-2 parts of a self-repairing polymer containing microcapsules, and 1-10 parts of an antibacterial agent. By adding the novel deodorant, peculiar smell molecules generated in the hot melting process are effectively captured, adsorbed and degraded, the smell of the product is remarkably reduced, and more comfortable user experience is provided.

The invention provides a composite modified asphalt and a preparation method thereof, belonging to the technical field of polymer materials, wherein the composite modified asphalt contains SBS modified asphalt, modified tire rubber powder, epoxy asphalt, SBR, high modulus anti-rutting agent, asphalt warm mix agent, maleic acid resin, rubber softening oil, ethylhexyl stearate, isopropyl stearate, etc.; SBS modified asphalt is modified by AH-110 asphalt, AH-90 asphalt and AH-70 asphalt through SBS modifier, and calcium stearate, isopropyl stearate, asphalt warm mix agent, etc. are also added; modified tire rubber powder is obtained by using waste tire rubber powder as raw material, and surface composite coating modification is performed by basalt fiber, silica ash and AH-130 asphalt powder. Various components are melted and prepared by blending, and the composite modified asphalt has good high temperature stability, low temperature crack resistance, fatigue resistance and water damage resistance, and better adapts to the use environment of viaducts.

The invention belongs to the technical field of PVC auxiliaries, and particularly relates to a compounding method of a PVC environment-friendly stabilizer, which comprises the following steps: cleaning expanded vermiculite, sequentially depositing titanium dioxide and calcium-zinc ions, then obtaining calcium-zinc stearate modified expanded vermiculite through a spraying reaction of sodium stearate, and finally mixing with an antioxidant, a lubricant, an auxiliary stabilizer and an ultraviolet absorbent to obtain the PVC environment-friendly stabilizer. The PVC environment-friendly stabilizer is obtained. The defects of an existing stabilizer are overcome, the porous structure of expanded vermiculite is used as a frame, zinc stearate and calcium stearate are fixed to the surface in an in-situ fixing mode, and the zinc stearate and calcium stearate composite stabilizer has the advantages of being not prone to precipitation and good in stabilizing effect.

The invention relates to the technical field of cables, and provides a 10kV flame-retardant wire cable and a preparation method thereof. The 10kV flame-retardant wire cable comprises a bunched wire core and an outer sheath layer, the outer sheath layer is prepared from the following raw materials in parts by weight: 40 to 50 parts of linear low-density polyethylene, 30 to 40 parts of ethylene-vinyl acetate copolymer, 18 to 20 parts of microencapsulated ammonium polyphosphate, 6 to 8 parts of organic modified nano montmorillonite, 4 to 6 parts of zinc borate, 1 to 2 parts of silane coupling agent, 0.5 to 1 part of antioxidant and 0.4 to 0.6 part of calcium stearate. According to the 10 kV flame-retardant electric wire and cable prepared in the invention, the flame-retardant grade of the flame-retardant electric wire and cable is improved, but the problem that the elongation at break of the material is reduced due to excessive addition of the inorganic flame retardant is solved; and the problems of environmental adaptability and mechanical performance of sheath cracking easily caused by insufficient bending radius of the cable are improved.

The invention relates to the technical field of regenerated polyethylene materials, and particularly discloses a high-flame-retardant regenerated polyethylene plastic and a preparation process thereof. Comprising the following steps: S1, taking maleic anhydride polyamidoamine, adding water and ethanol, uniformly stirring, adding 1-octene, a vinyl silane coupling agent and benzoyl peroxide, stirring for reaction, and removing a solvent to obtain a modifier; s2, adding carbon black into water and ethanol, uniformly stirring, heating, adding a modifier, and performing reflux reaction to obtain modified carbon black; s3, adding double-bond phosphate and sulfydryl modified benzene diboron into tetrahydrofuran, uniformly stirring, adding high-density polyethylene and a photoinitiator, mixing, carrying out ultraviolet irradiation, filtering, taking a solid, and drying, so as to obtain modified polyethylene; s4, taking regenerated high-density polyethylene, polypropylene, modified polyethylene, calcium stearate, modified carbon black, an antioxidant, a diisocyanate cross-linking agent, dicumyl peroxide and toner, uniformly stirring, and performing melt extrusion to obtain the high-flame-retardant regenerated polyethylene plastic.

The invention relates to the technical field of environment-friendly materials, and discloses a high-strength degradable packaging material and application of the high-strength degradable packaging material in cosmetic packaging materials.The preparation method of the high-strength degradable packaging material comprises the steps that polylactic acid, vanillic aldehyde modified polyester, polyadipic acid, triethyl citrate, calcium stearate and an antioxidant are added into a high-speed mixing machine, and the mixture is stirred to be uniform; mixing at 60 to 80 DEG C for 10 to 20 minutes to obtain a mixed material; the mixed material is subjected to melt blending through a double-screw extruder, the blending temperature is 160-180 DEG C, the screw rotating speed is 250-300 rpm, extrusion granulation and drying are conducted, and the high-strength degradable packaging material is obtained. The high-strength degradable packaging material can be applied to cosmetic packaging materials such as bottle bodies, bottle caps, hoses and packaging boxes. The prepared packaging material is high in mechanical strength and has good degradability and flame retardance.

The invention relates to the technical field of bottom protection plates, and provides an engine bottom protection plate and a preparation method thereof. The engine bottom protection plate is prepared from the following raw materials in parts by weight: 40 to 50 parts of polypropylene, 15 to 20 parts of glass fiber, 5 to 10 parts of silicon carbide modified carbon fiber, 5 to 9 parts of nano silicon dioxide, 2 to 3 parts of compatilizer, 0.5 to 1 part of antioxidant, 0.3 to 0.5 part of calcium stearate and 0.4 to 0.6 part of polyethylene wax. The engine bottom guard plate provided by the invention is high in hardness, also has certain acid and alkali resistance, keeps good mechanical properties, and meets the development of the modern automobile industry and the change of consumer demands.

The invention belongs to the technical field of building materials, and particularly relates to a preparation method of a biomass reinforced cement-based thermal insulation wall material and the wall material. The preparation method comprises the following steps: (1) crushing wood fibers, putting the crushed wood fibers into a NaOH solution, washing with water and drying; (2) carrying out dry mixing on cement, the modified wood fiber, nano SiO2 particles and calcium stearate; (3) diluting hydrogen peroxide with warm water, adding into the mixture, and stirring; (4) injecting the foaming slurry into a mold, and vibrating; and (5) steam curing. Through a collaborative technology of fiber surface modification, nano-particle regulation and control and hydrophobic layer construction, the comprehensive performance breakthrough of the fireproofing grade of A1 grade, the heat conductivity coefficient of 0.048-0.055 W / (m.K) and the compressive strength of 1.2-1.8 MPa is realized. The energy consumption is reduced by 70% through the low-temperature steam curing process, the proportion of agricultural waste is larger than or equal to 30%, the carbon emission intensity is smaller than or equal to 150 kgCO2 / m < 3 >, and the requirement for green buildings is met.

The invention relates to the technical field of cables, and provides a high-temperature-resistant flame-retardant cable and a preparation method thereof. The high-temperature-resistant flame-retardant cable comprises a conductor and a flame-retardant outer sheath, the flame-retardant outer sheath is prepared from the following raw materials in parts by weight: 40 to 50 parts of linear low-density polyethylene, 35 to 45 parts of ethylene-vinyl acetate copolymer, 10 to 15 parts of ethylene propylene diene monomer, 15 to 18 parts of modified aluminum hydroxide, 10 to 14 parts of modified magnesium hydroxide, 5 to 8 parts of polyethylene grafted maleic anhydride, 5 to 8 parts of microencapsulated red phosphorus, 2 to 3 parts of silane coupling agent and 0.8 to 1 part of antioxidant. The composite material is prepared from the following components in parts by weight: 0.5-1 part of a light stabilizer, 0.5-1 part of calcium stearate, 0.8-1 part of polyethylene wax and 0.5-0.9 part of carbon nanotubes. According to the cable prepared in the invention, the performance stability of an existing high-temperature-resistant material in a high-temperature environment is improved, and the problems of softening, melting and the like of the cable are avoided.

The invention discloses a cation modified soft PVC membrane material and a preparation method thereof, and relates to the technical field of high polymer materials. When the cation modified soft PVC membrane material is prepared, pre-modified polyvinyl chloride and an allyl salicylaldehyde Schiff base ligand react to prepare modified polyvinyl chloride; the preparation method comprises the following steps: carrying out a reaction on 5-oxo-2, 3-dihydro-5H-thiazolo [3, 2-a] pyridine-3, 7-dicarboxylic acid and N-(2-ethoxyl) maleimide to prepare a bismaleimide ultraviolet absorbent; reacting the pre-modified zinc oxide with 2-chloromethyl furan to obtain modified zinc oxide; and mixing the modified polyvinyl chloride, the modified zinc oxide, a bismaleimide ultraviolet absorbent, zinc acetate, diisononyl phthalate, epoxidized soybean oil and calcium stearate, plastifying, calendering, cooling and rolling to prepare the cation modified soft PVC membrane material. The cation modified soft PVC membrane material prepared by the invention has excellent antibacterial, anti-aging and self-repairing properties.

The invention discloses a graphene modified PP (polypropylene) resin antibacterial master batch and a preparation method thereof. The graphene modified PP resin antibacterial master batch is prepared from the following components in parts by weight: 100 to 150 parts of polypropylene, 100 to 150 parts of nano calcium carbonate, 2 to 10 parts of graphene, 0.01 to 0.1 part of sodium pyrithione, 0.003 to 0.01 part of calcium stearate, 1 to 5 parts of maleic anhydride grafted polypropylene, 0.03 to 0.08 part of coupling agent and 0.1 to 0.8 part of antioxidant. The preparation method comprises the following steps: adding graphene into an ethanol solution, adding a coupling agent at the same time for ultrasonic dispersion, and then removing ethanol in a rotary evaporation manner; sodium pyrithione and calcium stearate are stirred and mixed uniformly, so that the surface of sodium pyrithione is coated with calcium stearate; and uniformly mixing and stirring nano calcium carbonate, maleic anhydride grafted polypropylene, an antioxidant, the pretreated graphene, sodium pyrithione and polypropylene.

The invention relates to the technical field of cables, in particular to a fireproof cable for a subway, which comprises a plurality of cable cores and a PET (Polyethylene Terephthalate) film layer, a mica tape wrapping layer, a copper net shielding layer and an outer sheath are sequentially coated outside the PET film layer; the outer sheath is prepared from the following raw materials in parts by weight: 50-60 parts of PVC resin, 8-15 parts of nylon 66 resin, 5-10 parts of aliphatic TPU, 5-8 parts of EVA-G-MAH, 3-5 parts of POE-G-MAH, 1-3 parts of a calcium-zinc stabilizer, 10-20 parts of a filler, 1-2 parts of polyethylene wax, 0.5-1 part of calcium stearate, 10-20 parts of a flame retardant, 10-30 parts of a plasticizer and 0.1-0.5 part of an antioxidant. The outer sheath prepared by the invention has excellent mechanical properties and excellent fireproof and flame-retardant properties, not only is high in flame-retardant grade, but also is small in heat and smoke production after combustion, and is an excellent material for preparing fireproof cables for metro.

The invention belongs to the technical field of high polymer materials, and discloses a corrosion-resistant buried polyolefin drainage pipe and a preparation method thereof.The corrosion-resistant buried polyolefin drainage pipe is prepared from, by mass, 100-120 parts of high-density polyethylene, 20-30 parts of ABS resin, 5-10 parts of plasticizer, 10-15 parts of modified boron nitride, 0.5-2 parts of composite flame retardant, 0.1-0.5 part of antioxidant, 3-5 parts of calcium stearate and 1-3 parts of PE wax; the modified boron nitride is a triazine derivative which is grafted on the surface of hexagonal boron nitride and contains a plurality of benzisothiazolinone units; the composite flame retardant is compounded by a phosphorus-containing Schiff base flame retardant and DOPO according to the mass ratio of 1: (2-4); the high-density polyethylene is used as a matrix, the modified boron nitride is added, so that the corrosion resistance of the material is improved, the phosphorus-containing Schiff base flame retardant is compounded with DOPO, the flame retardance of the material is improved, and meanwhile, the dosage of DOPO is reduced.