324 results about "Calcium stearate" patented technology

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 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 discloses a polyethylene composite geomembrane and a processing technology thereof in the field of geosynthetic materials. The polyethylene composite geomembrane is prepared from the following raw materials: high-density polyethylene, polyethylene grafted maleic anhydride, a nano montmorillonite / low-density polyethylene composite modifier, an antioxidant, a light stabilizer and a lubricant calcium stearate. Wherein the polyethylene grafted maleic anhydride is prepared by drying high-density polyethylene, mixing the dried high-density polyethylene with maleic anhydride, an initiator and an antioxidant, and performing melt extrusion through a double-screw extruder, so that the surface polarity is improved; the nano-montmorillonite / low-density polyethylene composite modifier is prepared by ultrasonically dispersing Na-montmorillonite, adding hexadecyl trimethyl ammonium bromide, stirring, centrifugally drying to obtain organic modified montmorillonite, mixing the organic modified montmorillonite with low-density polyethylene, performing intercalation reaction, and performing twin-screw extrusion and blending, so that the barrier property is enhanced. The processing technology comprises the steps of raw material mixing, twin-screw extrusion granulation and calendaring molding, and finally the polyethylene composite geomembrane with remarkably improved interface cohesiveness, weather resistance and barrier property is prepared.

The invention relates to the technical field of PA resin, and particularly discloses glass fiber modified antibacterial PA resin suitable for children products and a preparation method of the antibacterial PA resin. The invention discloses glass fiber modified antibacterial PA resin suitable for children products. The glass fiber modified antibacterial PA resin comprises PA resin, glass fibers, talcum powder, nano calcium carbonate, a composite antibacterial agent, a compatilizer, an antioxidant and calcium stearate, the composite antibacterial agent comprises chitosan, an antibacterial peptide microcapsule and a porous silver-zinc-loaded antibacterial agent; the antibacterial peptide microcapsules are sodium alginate embedded antibacterial peptides. The antibacterial PA resin obtained in the invention has the highest bacteriostasis rates of 99.97%, 99.74% and 99.95% for staphylococcus aureus, escherichia coli and candida albicans respectively, the antibacterial property of the PA resin is improved, the compressive strength and notch impact strength are 170.6 MPa and 17.3 kJ / m < 2 > respectively, and high mechanical strength is maintained on the basis of high antibacterial property.

The invention relates to the technical field of pharmaceutical preparations, in particular to a solid dispersion-based sustained-release drug composite carrier as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out synergistic spray drying on double polymers (hydroxypropyl methylcellulose acetate succinate and polyvinylpyrrolidone-vinyl acetate copolymer) to form a solid dispersion; compounding with mesoporous silica and calcium silicate for localization, and spraying ethanol to activate pores; calcium stearate and magnesium stearate are sequentially added for lubrication; prefabricating a sustained-release skeleton master batch; and finally, mixing, rolling and forming. According to the method, through hierarchical structural design, the drug stability, the powder fluidity and the release controllability are remarkably improved, the method is suitable for industrial production of the dihydroergoline mesylate sustained release preparation, and a release curve is smooth and reliable.

The invention relates to the technical field of plastics, and provides a plastic pipe and a preparation method thereof. The plastic pipe is prepared from the following materials in parts by weight: 100 parts of PVC (Polyvinyl Chloride), 15 to 18 parts of silicon dioxide composite filler, 2 to 4 parts of maleic anhydride grafted POE (Polyolefin Elastomer), 4 to 6 parts of epoxidized soybean oil, 3 to 5 parts of calcium-zinc composite heat stabilizer, 2 to 3 parts of silane liquid impregnated glass fiber, 0.5 to 1 part of calcium stearate, 0.8 to 1.2 parts of polyethylene wax, 1 to 1.2 parts of processing aid and 0.5 to 1 part of antioxidant. According to the plastic pipe provided by the invention, the heat resistance of the plastic pipe is improved, and the ageing resistance of the plastic pipe is improved.

The invention relates to the technical field of cables, and provides a high-temperature-resistant power cable. The high-temperature-resistant power cable comprises a conductor and a high-temperature-resistant outer sheath, the high-temperature-resistant outer sheath is prepared from the following raw materials in parts by weight: 80 to 90 parts of linear low-density polyethylene, 10 to 15 parts of ethylene-vinyl acetate copolymer, 20 to 25 parts of polyurethane grafted aluminum borate whisker, 12 to 15 parts of polyolefin elastomer, 0.5 to 1 part of antioxidant, 0.8 to 1 part of dicumyl peroxide, 1.0 to 1.2 parts of crosslinking aid TAIC, 0.3 to 0.8 part of stabilizer, 0.5 to 1 part of calcium stearate and 0.2 to 0.5 part of polyethylene wax. According to the cable prepared in the invention, the stability of the interlayer structure of the high-temperature-resistant power cable during long-term high-temperature operation is improved, and the anti-degradation performance of the material of the high-temperature-resistant power cable in a long-term high-temperature environment is improved.

The application discloses a kind of composite gel-physical foaming synergistic carbon dioxide foam concrete preparation process, carbon dioxide foam concrete, by mass parts, consisting of following components: sulphate cement 15-45 parts, hemihydrate gypsum 10-50 parts, Portland cement 5-15 parts, mineral powder 0-30 parts, gypsum retarder 0-0.3 parts, retarder 0.2-0.4 parts, water reducing agent 0.2-0.4 parts, calcium stearate 0.2-0.6 parts, hydroxypropyl methylcellulose ether (HPMC) 0.1-0.3 parts, water-cement ratio 0.2-0.45, prefabricated foam 5-15 parts.Sulphate cement, Portland cement and hemihydrate gypsum are mixed to prepare carbon dioxide foam concrete when specific mass ratio, can play the hydration synergistic effect between three, and then can greatly improve the mechanical properties of carbon dioxide foam concrete.

The invention discloses a high-flame-retardant plate and a production process thereof, and relates to the technical field of flame-retardant materials. The high-flame-retardant plate is prepared from the following raw materials in parts by weight: 90 to 110 parts of magnesium oxide, 15 to 20 parts of magnesium chloride, 30 to 35 parts of magnesium sulfate, 1.5 to 3 parts of modified polyvinyl alcohol, 1 to 2 parts of starch, 0.3 to 0.8 part of modified borax, 0.2 to 0.5 part of silane coupling agent KH-550, 1 to 2 parts of absolute ethyl alcohol, 2.5 to 3.5 parts of nano zinc borate, 2 to 4 parts of chlorinated paraffin-70, 0.5 to 1 part of nano titanium dioxide, 5 to 10 parts of basalt fiber and 0.2 to 0.5 part of calcium stearate. And 90 to 110 parts of deionized water. The raw materials of the high-flame-retardant plate are subjected to condensation cross-linking and nanometer enhancement of the modified polyvinyl alcohol and esterification and chelation treatment of the modified borax, so that the flame-retardant compatibility is improved. In production, pre-dispersion of the silane coupling agent and synergistic mixing of the starch paste are matched with precise viscosity regulation and control and stepped sanding, so that uniformity of the slurry is ensured. And hot pressing parameters are optimized, so that the plate is high in density and excellent in flame retardance and surface precision.

The invention discloses high-strength plastic particles as well as a preparation method and application thereof, and belongs to the technical field of high polymer material modification. The plastic particle is prepared from high-density polyethylene, hyperbranched polyesteramine containing a diurea group, a layered double metal hydroxide-polypyrrole nano hybrid, a maleic anhydride grafted ethylene-octylene copolymer, an antioxidant and calcium stearate. Wherein the hyperbranched polyesteramine containing the diurea group is prepared by reacting pentaerythritol with citric acid to generate a citrate framework and then reacting with diphenylmethane diisocyanate and 1, 4-butanediol; the layered double hydroxide-polypyrrole nano hybrid is prepared by carrying out in-situ polymerization and coating on magnesium-aluminum layered double hydroxides through a pyrrole monomer. According to the plastic particle, the tensile strength, the heat resistance and the flame retardance are remarkably improved through synergistic enhancement of the hyperbranched polyesteramine and the nano hybrid, and the plastic particle can be applied to the fields of automobile bumpers, high-voltage cable sheaths, weather-proof plates for buildings and the like.

The invention provides a high-toughness bundling grating and a production process of the high-toughness bundling grating. The composite material is prepared from the following raw materials in parts by weight: 32 to 42 parts of epoxy modified unsaturated polyester resin, 26 to 36 parts of alkali-free glass fiber, 7 to 11 parts of metallocene polyolefin, 5 to 9 parts of high-branching-degree polyolefin, 4 to 8 parts of ethylene propylene diene monomer, 2.5 to 5.5 parts of core-shell structure elastomer toughening agent, 1.5 to 4.5 parts of modified nano aluminum nitride-graphene composite filler, 0.7 to 1.1 parts of silane coupling agent and 0.5 to 0.9 part of antioxidant. 0.4 to 0.7 part of ultraviolet stabilizer, 0.4 to 0.8 part of calcium stearate and 0.1 to 0.3 part of conductive additive. According to the invention, the core-shell structure elastomer toughening agent realizes toughening without damaging strength through core-shell synergy, and the impact strength is improved by 40% or above; the modified nano aluminum nitride-graphene composite filler constructs a heat conduction-antistatic network, and the modified nano aluminum nitride-graphene composite filler and the metallocene polyolefin are matched with the high-branching-degree polyolefin and the ethylene propylene diene monomer to enhance low-temperature toughness and creep resistance.

The invention discloses a recycled PP composite material with flame-retardant and antibacterial properties and a preparation method thereof, and relates to the technical field of recycled PP composite materials. The recycled PP composite material with flame-retardant and antibacterial properties is prepared from the following raw materials in parts by weight: 60 to 75 parts of recycled PP, 15 to 25 parts of modified magnesium hydroxide, 3 to 8 parts of modified chitosan, 2 to 5 parts of ethylene-vinyl acetate copolymer, 0.5 to 1.5 parts of silane coupling agent KH-550, 8 to 15 parts of ammonium polyphosphate, 0.3 to 0.8 part of calcium stearate, 1 to 3 parts of nano titanium dioxide and 0.2 to 0.6 part of tributyl citrate. The recycled PP composite material has the remarkable advantages that the recycled PP is used as a base material, so that the environment is protected and the cost is low; through compounding of modified magnesium hydroxide, modified chitosan and the like, the flame-retardant antibacterial coating has excellent flame-retardant and antibacterial properties; the preparation process is clear and controllable, the raw material compatibility is scientific, the compatibility of the components is good, the product performance is stable, and the application prospect is wide.

The invention discloses a high-temperature-resistant low-permeability CPVC chemical pipe and a preparation process thereof, and relates to the technical field of CPVC, and the preparation method comprises the following steps: adding chlorinated polyethylene powder, quaternary ammonium salt sodium carboxymethyl cellulose modified boron nitride nanosheets, a heat stabilizer, p-phenylenediamine and terephthaloyl chloride into a mixer, heating to 80-90 DEG C, stirring for reaction for 45-60 min, and cooling to room temperature to obtain the high-temperature-resistant low-permeability CPVC chemical pipe. A premix is obtained; and adding the premix into a double-screw extruder, adding calcium stearate, and carrying out melt blending, extrusion molding, room-temperature vacuum setting and cooling setting to obtain the high-temperature-resistant low-permeability CPVC chemical pipe. The heat stabilizer is composed of an adenine metal complex and theophylline.

The invention discloses low-gas-evolution and high-heat-resistance precoated sand and a preparation method thereof, and relates to the technical field of casting materials.The preparation method comprises the following steps that cast steel reclaimed sand is dried, so that the water content of the cast steel reclaimed sand is reduced to 0.1% or below; taking 1000 parts by weight of treated cast steel reclaimed sand, adding 5-10 parts by weight of a silane coupling agent, and uniformly mixing; the mixed materials are heated to 75-80 DEG C and then transferred into a sand mixer, 30-40 parts by weight of organic polysilazane resin is added, and sand mixing is conducted; adding 6-8 parts by weight of carbon nanotube powder, and mixing for 30 seconds; sequentially adding 5-7 parts by weight of vinyl silicone oil and 1.8-2.4 parts by weight of calcium stearate, and uniformly mixing to obtain a precoated sand product. According to the present invention, the novel bonding system is adopted to prepare the sand mold through the low temperature film coating process, and the prepared sand mold can generate ceramic transformation during the casting stage so as to provide characteristics of extremely low gas forming amount, extremely high heat resistance, low thermal expansion rate and excellent casting quality, and the production process has characteristics of energy saving and consumption reducing.

The invention discloses a flame-retardant PVC (polyvinyl chloride) wood-plastic plate which is prepared from the following raw materials in parts by weight: 100 parts of SG-7 type PVC resin; 20-30 parts of modified wood powder; the composite flame retardant is composed of ammonium polyphosphate, aluminum hydroxide, molybdenum trioxide and zinc borate according to the weight ratio of 15: 20: 16: 4; the mass ratio of the aluminum-titanium composite coupling agent to the wood flour is 1: 100; 5-8 parts of a calcium-zinc stabilizer; the lubricant is composed of polyethylene wax, paraffin and calcium stearate according to the weight ratio of 1: 1: 1; and 5-10 parts of an acetyl butyl citrate plasticizer. The invention relates to the technical field of polymer composite materials, in particular to a flame-retardant PVC wood-plastic plate and a preparation method thereof.The flame-retardant PVC wood-plastic plate and the preparation method thereof have the remarkable advantages that due to a composite flame retardant, the oxygen index of the plate reaches 32.1%, the combustion performance reaches the UL94V-0 level, and the smoke density is reduced by 72.1%; the tensile strength, the impact strength and the bending strength are respectively improved by 339.6%, 59.1% and 179.5% when the wood powder is treated by the aluminum-titanium coupling agent; the extrusion temperature of 150-175 DEG C and the screw rotating speed of 12-18 r / min are accurately controlled, the problems of wood powder carbonization and flame retardant decomposition are avoided, and the quality consistency is guaranteed.

The application discloses a polypropylene woven bag and a preparation method thereof. The polypropylene woven bag is woven by a woven material, and the woven material comprises the following components in parts by weight: polypropylene 90-110 parts, alumina whisker 8-12 parts, carbon nanotube with surface modified polydopamine 0.5-1 part, calcium stearate lubricant 0.5-1 part, ethylene-butyl acrylate-maleic anhydride terpolymer compatibility agent 5-10 parts, and antioxidant 0.3-0.6 part. The preparation method comprises the following steps: adding the components of the woven material into a high-speed mixer, and mixing to obtain a mixture; feeding the mixture into an extruder, and performing melting extrusion, cooling, stretching and setting to prepare polypropylene flat filaments; cross-weaving the polypropylene flat filaments into woven cloth, performing pattern printing on the surface of the woven cloth, and then sequentially performing cutting, sewing or bonding to seal the bottom, so that the polypropylene woven bag is prepared. The polypropylene woven bag obtained by the method has excellent wear resistance and good toughness.

The invention discloses a polypropylene beta crystal form compound nucleating agent, a beta crystal form homo-polypropylene pipe special material and a production process thereof, and belongs to the technical field of polypropylene materials. The polypropylene beta crystal form compound nucleating agent disclosed by the invention is prepared from the following components in percentage by weight: 15 to 20 percent of beta crystal form nucleating agent, 60 to 70 percent of antioxidant, 7 to 11 percent of calcium stearate and 5 to 10 percent of polyphthalamide. The polypropylene beta crystal form compound nucleating agent has the advantages of high beta crystal form conversion rate, high rigidity, low dosage, good dispersity and the like, and the normal and low temperature impact strength of the material can be greatly improved. The beta crystal form homo-polypropylene pipe special material product obtained by the production process has excellent impact strength, thermal deformation temperature and flexural modulus performance, also has excellent processability, and is suitable for the fields of chemical pressure pipelines and pipe fittings, extrusion and compression molded plates, filter plates and solid rods.

The invention belongs to the technical field of daily plastic products, and particularly relates to a high-temperature-resistant reinforced transport case material and a preparation method thereof. The transport case is prepared from the following raw materials in parts by mass: 88 to 100 parts of polypropylene, 8 to 12 parts of PP-g-ITA, 7 to 10 parts of PP-g-AN, 0.05 to 0.2 part of an aryl dicarboxamide nucleating agent, 5 to 8 parts of fibers, 3 to 5 parts of mica powder, 0.2 to 0.5 part of an antioxidant, 0.1 to 0.2 part of a benzotriazole ultraviolet absorbent, 0.2 to 0.3 part of a silane coupling agent, 0.1 to 0.2 part of polyethylene wax, 0.2 to 0.4 part of calcium stearate and 0.1 to 0.3 part of pentaerythritol stearate. The preparation method of the high-temperature-resistant reinforced transport case material is simple, and a transport case prepared from the high-temperature-resistant reinforced transport case material is excellent in thermal stability, weather resistance and mechanical property.

The invention discloses an ultrahigh-fluidity hydrophobic toughening composite grouting material and a preparation method and application thereof, and belongs to the technical field of geotechnical engineering, the ultrahigh-fluidity hydrophobic toughening composite grouting material comprises the following raw materials: cement, fly ash, silica fume, a polycarboxylic acid water reducer, a polyether defoaming agent, calcium stearate, an ethylene-vinyl acetate copolymer and water. According to the invention, through the collaborative design of a composite gel system composed of cement, fly ash and silica fume, calcium stearate and ethylene-vinyl acetate copolymer (EVA), a novel grouting material which can synergistically give consideration to ultrahigh fluidity, excellent hydrophobicity and good mechanical properties is prepared; and a high-performance grouting material support is provided for effective prevention and control of water inrush disasters under complex hydrogeological conditions of deep mines.

The invention discloses a temperature and pressure coordinated regulation and control method and system for a calcium stearate reaction process, and relates to the field of industrial control, the system comprises an acquisition module, a processing decision module and a regulation and control module, and the acquisition module measures temperature and pressure at high frequency in each period and generates a parameter sequence; the processing decision module performs Kalman filtering on the parameter sequence to obtain a de-noising parameter sequence, performs subtraction on the de-noising parameter sequence and a target parameter to generate a deviation value sequence, and decides whether to regulate and control by counting an over-limit time ratio; when regulation and control are needed, the regulation and control module obtains a reaction fixed parameter set, establishes a correlation formula, calculates a coupling coefficient vector sequence, splices the coupling coefficient vector sequence and a denoising parameter sequence into a trend characteristic matrix, inputs the trend characteristic matrix and a control parameter vector into a regulation and control network, and carries out dynamic attention convolution, equipment aging deduction, graph convolution and time sequence prediction. And iteratively updating the parameter control vector to obtain an optimal parameter control vector, thereby realizing precise linkage control of temperature and pressure.

The invention relates to the technical field of road engineering materials, in particular to an asphalt composite additive with warm mixing and odor removing functions. The invention provides an asphalt composite additive with warm mixing and odor removing functions. The asphalt composite additive is prepared from the following components in parts by weight: 50 to 60 parts of polyethylene, 30 to 45 parts of polyvinyl acetate, 20 to 30 parts of maleic anhydride grafted polyethylene, 35 to 50 parts of modified nano activated carbon and 15 to 25 parts of calcium stearate, a metal oxide and a silane coupling agent are loaded on the modified nano activated carbon, and the metal oxide is a mixture of copper oxide, manganese oxide and cerium oxide. The asphalt composite additive with the warm mixing and odor removing functions has the warm mixing and odor removing functions at the same time, after the composite additive is added into asphalt, the pavement performance and the processing performance of the asphalt are not affected, the mixing temperature of the asphalt can be reduced by 25-40 DEG C, and meanwhile the odor removing and smoke removing effects are excellent.

The invention belongs to the field of polymer composite materials, and discloses an antistatic composite material for a safety helmet and a preparation method of the antistatic composite material. Comprising the following components: 70 to 90 parts of a PC / ABS blending matrix, 12 to 20 parts of basalt fiber treated by a titanate coupling agent NDZ-311, 4 to 8 parts of a graphene quantum dot modified carbon nanotube-polyethylene glycol composite antistatic agent, 3 to 6 parts of polyaryletherketone micro powder, 0.2 to 0.6 part of an antioxidant 1010 and 0.4 to 1.0 part of calcium stearate. Wherein the mass ratio of PC to ABS in the PC / ABS blended matrix is (6: 4)-(7: 3); the invention aims to solve the problems that in the prior art, a single antistatic agent is difficult to consider the antistatic effect and the mechanical property, or materials are embrittled due to high addition amount, or the antistatic property fluctuates along with the environment and is easy to lose due to low addition amount; the interface bonding force between the conventional reinforced fiber and the PC / ABS matrix is weak, and the mechanical strength is limited to be improved; the long-term aging resistance of the material is poor, and the long-term use requirements of outdoor, chemical and other severe environments cannot be met.

The invention belongs to the technical field of steel bridge pavement, and particularly discloses a high-viscosity asphalt double-layer SMA pavement layer structure and a construction technology thereof. The high-viscosity asphalt double-layer SMA pavement layer structure comprises an upper pavement layer, a waterproof bonding layer and a lower pavement layer, the upper pavement layer is laid on the lower pavement layer, the upper pavement layer comprises fine aggregate, limestone powder, modified asphalt, basalt fibers and a Wenn glue mixture, the thickness of the upper pavement layer is 35-40 mm, and the thickness of the waterproof bonding layer is 10-20 mm. The waterproof bonding layer comprises modified asphalt, epoxy resin, a silane coupling agent, a curing agent, a curing accelerator, butadiene styrene rubber, a silane coupling agent and talcum powder, the thickness of the waterproof bonding layer is 0.5-1 mm, and the lower pavement layer comprises coarse aggregate, modified asphalt, acrylonitrile-butadiene-styrene copolymer, porous ceramic particles, rubber particles, calcium stearate and waterborne polyurethane. And the thickness of the lower paving layer is 10-15mm. Various raw materials are mixed, so that the strength and durability of the pavement layer structure are improved, and the service life of the pavement is prolonged.

The application relates to the technical field of concrete, and particularly discloses a concrete containing building waste and used for preparing a fabricated prefabricated composite board, which is composed of the following components: water, cement, fly ash, fine aggregate, modified recycled coarse aggregate and water reducing agent; the modified recycled coarse aggregate is modified by the following method: 1) calcium stearate and zinc stearate are mixed and heated until completely melted to obtain a modifier; 2) the recycled coarse aggregate is soaked in the modifier, the recycled coarse aggregate is filtered out, and the pretreated recycled coarse aggregate is obtained after cooling; and 3) the pretreated recycled coarse aggregate is stirred and polished in corundum, and the modified recycled coarse aggregate is obtained after filtering. The application has the advantage that the concrete containing building waste and used for preparing the fabricated prefabricated composite board has improved impermeability after solidification. The application effectively consumes the building waste and reduces environmental pollution, and is relatively environment-friendly.

The invention discloses a catalyst for circulating hydrogen storage of 1, 4-butanediol / gamma-butyrolactone as well as a preparation method and application of the catalyst, and belongs to the technical field of catalysts. The catalyst comprises bimetallic active components CuO and AgO, a skeleton component, a rare earth auxiliary agent and calcium stearate, the skeleton component comprises CeO2 and at least one of the following oxides: ZnO, TiO2, ZrO2, MoO3 and Al2O3; on the basis of the total mass of the catalyst, the content of CuO is 55-80 wt%, and the content of AgO is 0.5-1.5 wt%; the total content of the skeleton component is 15-42 wt%, wherein the content of CeO2 is 10-38 wt%; the content of the rare earth additive oxide is 1-5wt%; and the content of calcium stearate is 1.5-4.5 wt%. The preparation method comprises the following steps: preparing a carrier precursor through a coprecipitation method; auxiliary loading and crystal phase regulation and control; and post-processing and forming. The catalyst provided by the invention completely avoids the use of elements harmful to the environment, and has high activity, high selectivity, excellent carbon deposition resistance and long-period stability.

The invention discloses a composite woven bag and a preparation method thereof, and belongs to the technical field of woven bags, and the woven bag comprises the following components: polypropylene resin, calcium stearate, a polyolefin elastomer, polyethylene resin, nano cerium oxide, titanium dioxide and an auxiliary agent. The preparation method of the woven bag comprises the following steps: S1, preparing the inner layer surface material; s2, preparing an outer layer membrane material; s3, compounding the inner-layer membrane material and the outer-layer membrane material to prepare a composite surface material; and S4, the composite surface material is subjected to wire cutting to prepare a composite wire material, and the woven bag is prepared through the composite wire material. According to the woven bag woven by using the composite wires, the outer layer absorbs energy of ultraviolet rays through mutual circulation conversion in the nano cerium oxide, absorption of the woven bag to the ultraviolet rays is further reduced in cooperation with the reflection effect of the titanium dioxide, and the ultraviolet aging resistance of the woven bag is enhanced.

The application discloses a kind of bottle cap antibacterial plastics and preparation method thereof, belong to high polymer material production technical field, first, the bottle cap antibacterial plastics provided by the application includes the following mass parts raw materials: improved branched copolymer polypropylene: 70~80 parts, ZnO@ZrP core-shell powder: 2.0~3.0 parts, maleic anhydride grafting hydrogenated styrene-butadiene block copolymer: 5~8 parts, ethylene-octene copolymer: 8~12 parts, antioxidant 1010: 0.3~0.5 parts, calcium stearate: 0.5~1.0 parts.The bottle cap antibacterial plastics prepared by the application meets European Union EC No 1935 / 2004, Chinese GB 4806.7-2016 and other food contact material standards, provides a high reliability solution for beverage, pharmaceutical packaging.

The application discloses a kind of high-temperature-resistant polypropylene composite material, engine cover and its production process, belong to polypropylene composite material technical field, wherein high-temperature-resistant polypropylene composite material, by following weight fraction component consists of: polypropylene 100-120 parts, modified hexagonal boron nitride 15-20 parts, organic montmorillonite 10-15 parts, silica coated basalt fiber 8-10 parts, maleic anhydride grafting ethylene-octene copolymer 6-8 parts, antioxidant 1010 is 0.3-0.5 parts, antioxidant 168 is 0.3-0.45 parts, calcium stearate 0.5-0.8 parts, NA-11 nucleating agent 0.2-0.3 parts, carbon black 1-2 parts;According to raw material ratio, it is made by double-screw extruder melt blending granulation, injection molding, annealing and hot-pressing bonding process engine cover;The engine cover prepared by the method has excellent high-temperature-resistant performance, good mechanical properties and flame retardant performance.

The invention provides a high-temperature-resistant and low-water-absorption lithium battery diaphragm and a preparation method thereof. The diaphragm is prepared by coating double surfaces or single surface of a base membrane with coating slurry, wherein the coating slurry is mainly prepared by mixing nano calcium stearate and aluminum oxide in a mass ratio of (25-38): (40-55). According to the preparation method, the surface of the base membrane is coated with a layer of aluminum oxide slurry treated by a special process, and meanwhile, the heat resistance of the diaphragm is remarkably enhanced by optimizing the raw material ratio of the coating slurry and the process flow. The coating slurry not only endows the diaphragm with excellent hydrophobic characteristics and effectively reduces the absorption of moisture, but also can maintain extremely low moisture content under extreme environmental conditions, thereby ensuring that the moisture content of the diaphragm is continuously in a low-level state. The innovative method provides a new technical approach for improving the performance of the lithium ion battery diaphragm.

The invention belongs to the technical field of building thermal insulation materials, and particularly relates to putty for external wall thermal insulation and a preparation method thereof. The method comprises the following steps: 1) preparing materials; (2) premixing the nano aerogel, the ceramic fiber, the calcium sulfate whisker, the basalt fiber and the calcium stearate according to a proportion after material preparation is completed, so as to prepare composite powder; 3) uniformly dry-mixing a cement-based cementing material, cellulose ether and a water reducing agent, and mixing with the composite powder to prepare a base material; 4) slowly adding water into the base material, and continuously stirring to prepare a precursor; and 5) performing dynamic pre-aging on the precursor, and crushing and grinding the precursor into the putty powder after dynamic pre-aging. Cracking is reduced through a curing agent-free design, and the construction safety is improved; the pre-aging process widens the adaptability of the construction environment, and the requirements on humidity and temperature are obviously reduced; the microstructure is uniform, the heat conductivity coefficient is low and the mechanical property is stable; the cost is controllable and the method is suitable for large-scale popularization and application.