113 results about "Sodium stearate" patented technology

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 an antibacterial and deodorant particle which comprises an active particle and a hydrophilic film wrapping the outer surface of the active particle. The active particles comprise the following raw material components in parts by weight: 15-20 parts of SEBS, 8-15 parts of silicon dioxide, 10-20 parts of sepiolite powder, 6-16 parts of an antibacterial agent, 2-5 parts of sodium stearate, 2-5 parts of sodium citrate, 5-10 parts of beta-cyclodextrin, 18-27 parts of an adhesive and 1-3 parts of an odor neutralizer; the hydrophilic film is formed by forming a hydrophilic material. According to the antibacterial and deodorant particles, SEBS serves as a hydrophobic elastic framework of active particles, and free diffusion of active ingredients in the particles is limited through hydrophobic entanglement of molecular chains; meanwhile, a hydrophilic material is used as an outer coating film, and the release rate of the active components is controlled by adjusting the interface action of the active particles and sewage, so that the antibacterial and adsorption deodorization active components in the antibacterial and deodorization particles are stably and slowly released; it is ensured that the efficient and long-acting antibacterial and deodorizing effect can be achieved for 14 days in complex water environments such as domestic sewage treatment.

The invention relates to the technical field of anti-skid preparations, in particular to an environment-friendly stain-resistant anti-skid preparation and a preparation method thereof.The calcium carbonate is modified through sodium stearate, the adhesive force between the calcium carbonate and a base material can be improved, and meanwhile the surface roughness of a material is improved; the dispersity and the stability of the coating in water can be improved, and meanwhile, the binding force of the coating and a base material is enhanced; the modified titanium dioxide, the modified calcium carbonate and the modified fly ash are added into the base liquid component, so that the surface roughness of the material can be improved, and the anti-skid performance of the material is improved; the main components of the preparation, such as the polyurethane, the waterborne epoxy resin, the modified titanium dioxide, the modified calcium carbonate and the modified fly ash, are all environment-friendly materials and are environment-friendly, so that the pollution to the environment is reduced to a certain extent.

The invention belongs to the technical field of material chemistry, and relates to nano barium sulfate and a preparation method thereof. The invention provides a preparation method of nano barium sulfate, which comprises the following steps: adding a barium acetate solution, sulfhydrylated chitosan and sodium stearate into a sodium sulfate solution for mixing reaction, collecting the obtained product after the reaction is ended, filtering, drying and grinding to obtain the nano barium sulfate, the concentration of the sodium sulfate solution is 1.4 to 2.6 mol / L, and the concentration of the barium acetate solution is 1.4 to 2.6 mol / L; 0.05 to 0.15 g of thiolated chitosan and 0.05 to 0.15 g of sodium stearate are correspondingly added into each 100 mL of the sodium sulfate solution. The invention solves the technical problems of high particle size and non-uniform particle size distribution of nano barium sulfate particles when the nano barium sulfate particles are prepared by adopting a direct precipitation method.

The rod-shaped mud mask is prepared from the following raw materials in percentage by mass: 15 to 45 percent of humectant, 5 to 10 percent of diatomite, 5 to 10 percent of kaolin, 2 to 6 percent of thickening agent, 1 to 2 percent of covering agent, 0.5 to 1 percent of film-forming agent, 0.3 to 0.6 percent of preservative, 0.5 to 0.8 percent of essence, 0 to 0.05 percent of pigment, 1 to 3 percent of ethyl palmitate and the balance of water, wherein the thickening agent is sodium stearate, the humectant at least contains polyethylene glycol-32, and the ratio of the sodium stearate to the polyethylene glycol-32 is 1: (3-5). The rod-shaped mud mask has strong moisturizing and cleaning effects, can achieve the effects of cleaning and adsorbing grease and dirt in pores, is also convenient to smear on the skin, has better smearing property, uniformity and skin fitting property, and can play a role in massaging the skin when being smeared.

The invention discloses a pH-responsive alkaline clean fracturing fluid as well as a preparation method and application thereof, and belongs to the technical field of oil and gas field fracturing. The cleaning agent comprises the following components in parts by mass: 1-5 parts of an anionic surfactant, 1-5 parts of a zwitterionic surfactant, 0.2 part of a pH regulator and 100 parts of deionized water, wherein the anionic surfactant is sodium oleate or sodium stearate; the zwitterionic surfactant is erucyl amide propyl betaine or oleamide propyl betaine; and the surfactant is a surfactant. The pH regulator is any one of sodium hydroxide, potassium hydroxide and sodium bicarbonate. The fracturing fluid is a clean fracturing fluid system based on pH response type micelle dynamic reconstruction, and through the synergistic effect of a specific surfactant and a pH response mechanism, accurate and rapid regulation and control of viscosity, zero residue damage and construction process simplification are achieved; the technical problems that an existing surfactant fracturing fluid is complex in compounding process, cannot be recycled after gel breaking, is slow in gel breaking response and narrow in application range are solved.

The invention relates to the technical field of building materials, and discloses a mortar containing a nanometer material and a preparation method thereof, the mortar comprises 70-80 parts by weight of cement, 8-12 parts by weight of fly ash, 0.4-0.5 part by weight of a polycarboxylic acid water reducer, 0.4-0.6 part by weight of hydroxypropyl methyl cellulose, 1-2 parts by weight of the nanometer material, 2-3 parts by weight of modified silk fibroin and 40-50 parts by weight of water. Wherein the modified nano silicon dioxide is modified by gamma-aminopropyltriethoxysilane, the modified cubic nano calcium carbonate is subjected to compound modification by fumaric acid, sodium stearate and palmitic acid, and the modified silk fibroin is prepared by grafting modification by bis-aminopropyl terminated polysiloxane. According to the mortar, through optimization of component matching and modification treatment of the nano material and the silk fibroin, the mechanical property, durability and crack resistance of the mortar are remarkably improved, and the cost is controllable.

This invention discloses an aramid fiber reinforced solid conveyor belt and its preparation method, relating to the field of conveyor belt technology. Specifically, it includes the following steps: S1: Aramid fiber cloth passes through a continuous plasma surface treatment machine at a uniform speed, and its upper and lower surfaces are subjected to plasma activation treatment to obtain modified aramid fiber cloth; S2: (1) Natural rubber, styrene-butadiene rubber, chloroprene rubber, ethylene propylene diene monomer (EPDM) rubber, terpene phenolic resin, modifier, modified filler, bis-[3-(triethoxysilyl)propyl]tetrasulfide, zinc oxide, antioxidant, flame retardant, sodium stearate, vulcanizing agent, and vulcanization accelerator are added to a mixing machine and mixed to obtain a compound; (2) The compound is transferred to a calender and calendered to obtain a cover layer; S3: The cover layer, modified aramid fiber cloth, and cover layer are stacked in the order of top to bottom, and then rolled, bonded, and vulcanized to obtain an aramid fiber reinforced solid conveyor belt.

The invention relates to a sealing ring material and a preparation method and application thereof, and belongs to the technical field of diaphragm pump components. The sealing ring material comprises the following components in parts by weight: 100 parts of a rubber matrix; 5 to 10 parts of boron nitride nanosheets; 5 to 10 parts of graphene oxide; 4-8 parts of microcrystalline wax; 3-6 parts of sulfur; 2-4 parts of sodium stearate; 1-4 parts of a vulcanization accelerator; 1-3 parts of zinc oxide; 4-8 parts of an anti-aging agent; the rubber matrix comprises nitrile rubber, chloroprene rubber and isoprene rubber, and the nitrile rubber accounts for 60-80 wt% of the total amount of the rubber. The sealing ring material provided by the invention has relatively good high temperature resistance, is not easy to soften and deform, also has relatively good air tightness and permeation resistance, and has obvious performance advantages when being used as a sealing ring for a diaphragm pump.

The present invention provides a method for preparing heavy calcium carbonate with low oil absorption value by using a composite surface modifier, which consists of the following steps: Weigh heavy calcium carbonate powder (800 mesh) and place it in a high-speed mixer with controllable temperature, and set the temperature at 110 °C; Weigh composite surface modifiers (polyethylene glycol-300, sodium dodecyl sulfate and sodium stearate) with different mass ratios and 6 ml of water, place them in a small beaker, heat to dissolve them for standby; When the temperature of the high-speed mixer rises to 110 °C, drop the composite surface modifier into it, modify it at low speed for 5 minutes first, and then modify it at high speed for 5 minutes to obtain heavy calcium carbonate with low oil absorption value, and the oil absorption value is 14.7-16.5 g / 100 g. The technology of the present invention can significantly improve the surface modification and activation effect of heavy calcium carbonate powder, greatly reduce the oil absorption value, and has the advantages of simple treatment process, low energy consumption and strong timeliness, etc., and is an effective method for producing heavy calcium carbonate powder with low oil absorption value.

The application discloses an acrylic emulsion, and steps are as follows: adding deionized water, polyvinylpyrrolidone and sodium stearate into a reaction kettle under normal temperature, heating, stirring and dissolving, stopping heating after complete dissolution, and obtaining component A; stirring, mixing, heating and obtaining component B by mixing polyethylene glycol, water-based acrylic resin, a dispersing agent and an emulsifier under normal temperature; stirring and mixing water-based color paste, bisphenol A and sodium dodecyl sulfonate under normal temperature, and obtaining component C; stirring and mixing component A, component B and a defoaming agent under normal temperature, heating, cooling again, adding glycerol, cooling, adding essence and component C while stirring, uniformly stirring and mixing, continuously cooling, and obtaining the acrylic emulsion. The obtained acrylic emulsion is environment-friendly, harmless, does not affect children's health, not easy to age, and convenient to clean.

The invention discloses a special modified submicron antimony-based composite flame retardant for ABS (Acrylonitrile Butadiene Styrene). The special modified submicron antimony-based composite flame retardant is prepared from the following raw materials in parts by mass: 40 to 50 parts of submicron antimony trioxide, 20 to 25 parts of composite magnesium aluminum silicate, 20 to 25 parts of composite hydrophosphate, 2 to 5 parts of barium sulfate, 2 to 5 parts of superfine aluminum hydroxide and 2 to 5 parts of superfine magnesium hydroxide. Taking CTAB (cetyltrimethyl ammonium bromide), composite magnesium aluminum silicate and sodium stearate, mixing and reacting to obtain modified composite magnesium aluminum silicate; taking a silane coupling agent, submicron antimony trioxide and the modified composite magnesium aluminum silicate salt to react to obtain modified submicron antimony trioxide; taking a silane coupling agent, composite hydrophosphate and stearic acid to react to obtain modified composite hydrophosphate; finally, the modified submicron antimony trioxide, the modified composite hydrophosphate and the remaining raw materials are evenly mixed to obtain the special modified submicron antimony-based composite flame retardant for ABS, the special modified submicron antimony-based composite flame retardant for ABS has the good flame retardant effect and smoke suppression effect, and an ABS material prepared by mixing the special modified submicron antimony-based composite flame retardant with ABS resin can be used for production of new energy automobile key assemblies and high-end electronic and electrical components.

The application relates to the technical field of manganese additive, and discloses a preparation of a manganese element additive for producing an aluminum alloy and an adding method thereof; manganese element additives are pre-added at a feeding port of a smelting furnace, and aluminum liquid is added through the feeding port; the manganese element additives comprise manganese powder, a dissolving aid and a bonding agent; the dissolving aid is selected from one or more of aluminum powder or fluoroaluminate; the fluoroaluminate is potassium fluoroaluminate and / or sodium fluoroaluminate; and the bonding agent is selected from one or more of magnesium stearate or sodium stearate. The preparation of the manganese element additive for producing the aluminum alloy and the adding method thereof can solve the problems of low actual yield and instability of the manganese element additive and long smelting time in the adding process in the prior art, and provide a technical means with higher purity, more convenient production and better adding effect.

The present disclosure provides a method for preparing iron phosphate by the whole-chain integrated recycling of waste lithium iron phosphate batteries. The method comprises the following steps: (1) mixing waste lithium iron phosphate materials with a mixed chloride, and heating and melting to obtain a mixed melt; (2) mixing the mixed melt with sodium stearate, then carrying out a blowing reaction, and separating to obtain a carbon-containing lithium iron phosphate scum; (3) mixing the scum with an acid solution, adding hydrogen peroxide for a leaching reaction, and separating the solid and liquid to obtain a lithium-containing solution and a carbon-containing phosphorus iron slag; (4) mixing the carbon-containing phosphorus iron slag with an acid solution, leaching to obtain a phosphorus iron solution, adjusting the phosphorus-iron ratio, adding a complexing agent for a coprecipitation reaction to obtain iron phosphate. The method of the present disclosure can improve the purity of recycled lithium, and at the same time avoid multiple impurity removal processes required in the process of preparing iron phosphate from the phosphorus iron slag after lithium extraction, further improving the purity of iron phosphate prepared from the phosphorus iron slag and the phosphorus-iron recovery rate.

This invention relates to the field of polymer materials technology, and discloses a modified PET composition, its preparation method, and its application. The modified PET composition, by weight, comprises the following components: 70-85 parts isosorbide-modified PET resin, 2-5 parts rutile titanium dioxide, 3-5 parts needle-shaped calcium carbonate, 2-3 parts spherical calcium carbonate, 1-3 parts hydroxyl- or carboxyl-terminated hyperbranched dispersant, 0.2-0.6 parts antioxidant, 0.3-0.5 parts sodium stearate, and 0.1-0.3 parts nucleating agent. The modified PET composition of this invention achieves high heat resistance and heatability while also exhibiting high impact resistance, low warpage, and excellent processing flowability. It is suitable for thin-walled injection molding of food containers, possessing good dimensional stability and food contact safety.

The invention provides a corrosion-resistant coating and a preparation method thereof, and belongs to the technical field of coatings. Comprising the following components: 8 to 10 parts of polyaniline aqueous dispersion liquid, 21 to 25 parts of aqueous fluorocarbon resin, 25 to 30 parts of epoxy resin, 18 to 22 parts of butyl acetate, 16 to 17 parts of expandable graphite powder, 0.5 to 0.8 part of a silane coupling agent, 90 to 100 parts of deionized water, 2.0 to 2.3 parts of sodium stearate modified graphene and 2.5 to 2.7 parts of fluorine modified polyacrylamide. According to the invention, the impact resistance of the prepared corrosion-resistant coating can be effectively improved.

The invention discloses a soil stabilizer for road surface layer pouring. The soil stabilizer is prepared from the following raw materials in parts by weight: 20 to 30 parts of sodium silicate, 4 to 7 parts of polyacrylamide, 5 to 10 parts of sodium stearate, 4 to 6 parts of silane coupling agent KH560, 75 to 85 parts of cement, 2 to 5 parts of sodium chloride, 30 to 35 parts of water, 5 to 8 parts of coupling agent and 4 to 7 parts of alpha-aluminum oxide doped modifier. According to the soil stabilizer, sodium silicate and polyacrylamide are matched with sodium stearate, the silane coupling agent KH560, cement and other sodium chloride for blending, meanwhile, the coupling agent and the alpha-aluminum oxide doped modifier jointly achieve a synergistic effect, the strength performance of soil is optimized, and meanwhile the low-temperature strain performance and the Marshall stability effect of the product are remarkable.

The application discloses a kind of high anti-permeability high homogeneity cement-based repair mortar and preparation method thereof, belong to cement material preparation technical field.Concrete is: microcrystalline glass fine aggregate is dispersed to lye and is handled, after completion, the microcrystalline glass fine aggregate obtained is washed and placed in solution containing calcium ion source and carbon powder, then stirring heating reaction, obtain I-grade pretreatment fine aggregate;I-grade pretreatment fine aggregate is calcined in air atmosphere, and obtain II-grade pretreatment fine aggregate;II-grade pretreatment fine aggregate is placed in the mixed solution of sodium stearate and sodium alginate and is ultrasonically treated, then separate out solid, dry after III-grade pretreatment fine aggregate is obtained;III-grade pretreatment fine aggregate is mixed with cementitious component, silica fume, reinforcing fiber, water reducing agent, water and is stirred uniformly to obtain high anti-permeability high homogeneity cement-based repair mortar.The method of the application can make microcrystalline glass fine aggregate uniformly distributed in mortar, ensure repair effect.

Methods of making stable, dry coated fruit powders are provided. The methods include providing a fruit powder; selecting a hydrophobic stearate guest particle from the group consisting of ammonium stearate, zinc stearate, calcium stearate, sodium stearate, potassium stearate, magnesium stearate, glyceryl stearate, propylene glycol monostearate, sorbitan stearate, triglyceryl monostearate, hexaglyceryl distearate, and decaglyceryl monostearate; and dry coating the fruit powder with the hydrophobic stearate guest particles using high shear. The hydrophobic stearate guest particles are dry coated with respect to the fruit powder at levels between about 1 and 10 wt % in order to form a continuous layer.

The invention relates to the technical field of cables, and provides a corrosion-resistant aerial insulated cable which sequentially comprises a conductor, a shielding layer and an insulating layer from inside to outside. The conductor sequentially comprises an inner core layer and an outer core layer from inside to outside; the inner core layer is composed of six aluminum alloy conductors with the same diameter, and the outer core layer is composed of ten aluminum alloy conductors with the same diameter. The shielding layer is an aluminum foil shielding layer; the insulating layer comprises the following components in parts by weight: 70-80 parts of polyethylene, 20-35 parts of an ethylene-vinyl acetate copolymer, 15-20 parts of corrosion-resistant master batch, 25-30 parts of calcium carbonate, 1-2 parts of a light stabilizer, 2-3 parts of a lubricant, 1-2 parts of an antioxidant and 1-2 parts of a vulcanizing agent; the corrosion-resistant master batch is prepared from the following components in parts by weight: 65 to 70 parts of fluororubber, 5 to 9 parts of modified montmorillonite, 8 to 15 parts of ethylene-tetrafluoroethylene copolymer and 1 to 3 parts of sodium stearate. According to the technical scheme, the problem of poor corrosion resistance of the overhead insulated cable in the prior art is solved.

The invention discloses wear-resistant modified graphene lubricating oil and a preparation method thereof, and belongs to the technical field of lubricating oil, the wear-resistant modified graphene lubricating oil comprises the following raw materials: alkyl naphthalene base oil, sodium stearate, an antioxidant 5057, an organic silicon defoamer, polyisobutylene succinimide and a wear-resistant modified graphene additive; gamma-glycidyl ether oxypropyl trimethoxy silane is used for modifying graphene oxide in advance, accumulation between graphene sheet layers can be effectively prevented, agglomeration is avoided, then reduction is performed through vitamin C, residual oxygen-containing functional groups are removed, a conjugated structure is recovered, epoxy groups are reserved, and different from traditional hydrothermal synthesis, the preparation method has the advantages that the preparation method is simple, and the preparation cost is low. The graphene oxide and the carbon quantum dots only have physical adsorption, so that the graphene oxide and the carbon quantum dots can be prevented from falling off in high-pressure, strong-shearing-force and local high-temperature environments in the friction process, and the antifriction effect can be stably exerted for a long time.

The invention discloses a preparation method of high-strength quartz sand for fracturing, the quartz sand is subjected to cleaning, dehydration, ball milling and secondary modification, the modification is divided into polymerization modification and surface modification, a modifier for polymerization modification comprises vinyltriethoxysilane, sodium stearate, a 1% sodium hydroxide solution, phenolic resin and titanate, and the modifier is a mixture of vinyl triethoxysilane, sodium stearate, 1% sodium hydroxide solution, phenolic resin and titanate. According to the invention, the roundness, sphericity, surface smoothness, microstructure and other properties of the quartz fracturing sand are improved, so that the technical problems of lower strength and poorer crushing resistance of the quartz fracturing sand are solved.

The invention discloses a surface treatment method of a high-specific-gravity tungsten alloy, which comprises the following steps: firstly, carrying out plasma treatment on the high-specific-gravity tungsten alloy for 10-15 minutes at the treatment power of 350-400 W, and after the treatment is finished, preheating for 1 hour at the temperature of 60-65 DEG C to obtain the preheated high-specific-gravity tungsten alloy; preparing a modified liquid: adding 1-3 parts of a silane coupling agent KH550, 2-4 parts of a sodium stearate agent and 3-5 parts of a modified additive into 5-8 parts of a chitosan solution, and fully stirring to obtain the modified liquid. According to surface treatment of the high-specific-gravity tungsten alloy, the high-specific-gravity tungsten alloy is subjected to plasma treatment and then subjected to ultrasonic modification treatment through a modification solution, a sodium stearate agent in the modification solution is matched with a modification additive and a silane coupling agent KH550, and the acid corrosion resistance stability of a high-specific-gravity tungsten alloy product is optimized through blending and synergistic effects of the raw materials; the acid corrosion stability under different concentration conditions is optimized.

The invention relates to a preparation method of dihydroxy aluminum monostearate, which is characterized by comprising the following steps: (1) mixing sodium hydroxide and water, heating to 60-95 DEG C, adding stearic acid with the same molar as the sodium hydroxide, and stirring to react for 0.05-0.5 hour to generate a sodium stearate solution; (2) aluminum salt is dissolved in water and added into the sodium stearate solution, a reaction is conducted for 0.5-2 h, and the molar ratio of aluminum ions to sodium stearate in the aluminum salt solution is (1-1.03): 1; (3) dissolving ammonium carbonate in water, adding into the reaction liquid in the step (2), and reacting for 0.5-2 hours; and (4) separating the solid, and drying to obtain the dihydroxy aluminum monostearate. According to the preparation method provided by the invention, the dihydroxy aluminum monostearate with high purity and small particle size can be obtained with high yield.

The invention discloses a preparation method and application of amino acid complex iron, pressure in a reaction kettle I is instantaneously relieved, steam in reaction product particles is instantaneously flushed out, due to instantaneous pressure relief, the steam position in the particles is not filled, mesopores are formed, porous particles are obtained, and if the pressure relief time is too long, the particles are not filled with the mesopores. Steam in the particles cannot instantly overflow, and pore structures in the particles collapse along with slow reduction of pressure and temperature in the reaction kettle I, so that porous particles cannot be obtained. According to the preparation method of the amino acid complex iron, sodium stearate is added in the high-pressure reaction process, steam can be formed along with water and enters product particles, and in the subsequent instant pressure relief process, the sodium stearate can reduce the surface tension of the water, so that ferrous chloride tetrahydrate particles are stably dispersed in the water; the formation of support product particle mesopores is facilitated, and the collapse of pore structures in the particles is prevented, so that the porous particles are obtained.

This invention discloses an environmentally friendly calcium / zinc stabilizer and its preparation method. The stabilizer comprises the following raw materials in the indicated mass percentages: calcium salt 25-40%, zinc salt 10-15%, zinc acetylacetonate 5-10%, uracil 5-10%, antioxidant 5-10%, pentaerythritol sodium tetrastearate 5-10%, nano-sized montmorillonite 5-10%, polyethylene glycol 3-5%, and lubricant 22-35%. The stabilizer is prepared through the steps of raw material weighing, premixing, activation, homogenization, cooling, pulverization, and sieving. This invention utilizes a specific three-stage temperature-controlled blending process to achieve an in-situ stable three-dimensional structure formed by nano-montmorillonite, calcium and zinc ions, and polyethylene glycol polymer chains. This three-dimensional structure not only achieves uniform dispersion and synergistic effect of the components, endowing the stabilizer with excellent long-term thermal stability, but also simplifies the production process, avoids the use of expensive or complex modified raw materials, and significantly reduces production costs while ensuring performance, thus combining high efficiency, environmental friendliness, and economy.

The present invention provides a method of preparing a stable, dry-coated fruit powder. The method comprises providing a fruit powder; hydrophobic stearate / ester object particles are selected from ammonium stearate, zinc stearate, calcium stearate, sodium stearate, potassium stearate, magnesium stearate, glyceryl stearate, propylene glycol monostearate, sorbitan stearate, triglyceride monostearate, hexaglyceride distearate and decaglyceride monostearate; and dry coating the fruit powder with the hydrophobic stearate / ester guest particles using high shear. The hydrophobic stearate guest particles are dry coated at a level of about 1-10 wt% relative to the fruit powder to form a continuous layer.

This invention relates to the field of rubber materials technology. It provides a chlorohydrin rubber material with fatigue resistance, low-temperature resistance, and low air permeability, as well as its preparation method. The raw materials of the chlorohydrin rubber material, by weight, include 95-105 parts of chlorohydrin rubber, 33-37 parts of carbon black, 0.29-0.31 parts of sulfur, 0.9-1.1 parts of accelerator CZ, 1.1-1.3 parts of accelerator ETU, 4.8-5.2 parts of acid scavenger, 2.8-3.2 parts of antioxidant, 13-17 parts of plasticizer, 1.3-1.7 parts of dispersant, 1.5-2.5 parts of lubricant, and 2.0-3.0 parts of sodium stearate. The chlorohydrin rubber is an epichlorohydrin-ethylene oxide binary copolymer chlorohydrin rubber with a chlorine content of 24-26%. The chlorohydrin rubber material of this invention, without adding homopolymer raw rubber, can simultaneously satisfy the requirements of high fatigue resistance, excellent low-temperature resistance, and low air permeability.

The invention relates to the technical field of food packaging, in particular to an environment-friendly degradable food packaging material and a preparation process thereof. The invention relates to a preparation process of an environment-friendly degradable food packaging material. The preparation process comprises the following steps: preparing xylan coated silver nanoparticles, preparing modified vinasse powder, and preparing a toughening barrier blending agent. And preparing the food packaging material. The silver nanoparticles are coated with xylan, so that the antibacterial property, the stability and the material compactness are improved; and the sodium stearate modified vinasse powder enhances the interface effect of the matrix and improves the mechanical properties. The PBAT is subjected to chain scission-crosslinking by using sorbitol and aziridine cross-linking agents, so that hydroxyl and free volume are reduced to resist oxygen and water; a toughening barrier blending agent is synthesized through ester exchange polycondensation, and mechanical, barrier and antibacterial properties of the material are synergistically optimized by means of molecular crosslinking entanglement and a rigid structure.

The invention discloses a tungsten wire diamond wire and a preparation method thereof, and relates to the technical field of diamond wire manufacturing. Comprising the following steps that 1, a basic tungsten filament is subjected to soap soaking, cold drawing, cleaning and drying in sequence, and a tungsten filament bus is obtained; and 2, the tungsten filament bus is electroplated with a transition layer and a porous plating layer in sequence, then thermal diffusion, sanding, thickening, cleaning and drying are conducted, and the tungsten filament diamond wire is obtained. In the soap soaking process, a used saponification solution is composed of sodium stearate, 2-dodecyl-2H-benzotriazole and an ethanol water solution according to the mass ratio of (3-5): 1: 50. According to the tungsten wire diamond wire prepared through the method, the coating adhesive strength is high, the diamond micro-powder is stable, and therefore the mechanical property of the tungsten wire diamond wire can be remarkably improved, the cutting efficiency of the tungsten wire diamond wire is lasting, and the service life of the tungsten wire diamond wire is prolonged.