266 results about "Styrene-butadiene" patented technology

The invention provides a hot in-place recycling asphalt mixture and a construction method, and relates to the technical field of asphalt mixtures, and the hot in-place recycling asphalt mixture is obtained by recycling old asphalt pavement materials in a high proportion, reducing new material consumption and carbon emission, realizing resource recycling and green construction and introducing a regenerant to recover the performance of aged asphalt. The high-temperature rut resistance, the low-temperature crack resistance, the fatigue resistance and the interface bonding strength of the mixture are synergistically improved by matching with the styrene butadiene rubber modifier, the basalt fiber, the nano silicon dioxide and other functional materials, and the mixture is ensured to be uniform and free of segregation through precise feeding sequence, high-pressure atomization spraying and forced stirring parameter control. The defects of gray materials, oil balls and the like are avoided, the compactness, the flatness and the overall structure stability of the regenerated pavement are improved, and the problems of performance degradation and insufficient durability of a traditional regenerated mixture are solved.

The invention relates to the field of building waterproof materials, and discloses a composition for a modified asphalt coating material, the modified asphalt coating material, a preparation method and application of the modified asphalt coating material, an energy-saving waterproof coiled material and application of the energy-saving waterproof coiled material. The composition contains a main agent and an auxiliary agent, wherein the main agent comprises matrix asphalt, epoxidized soybean oil, star-shaped SBS, a thermoplastic polyurethane elastomer, butadiene styrene rubber, hydrogenated butadiene-acrylonitrile rubber and a first component; on the basis of the total weight of the composition, the content of the matrix asphalt is 40-55 wt%, the content of the epoxidized soybean oil is 5-10 wt%, the content of the star-shaped SBS is 3-5 wt%, the content of the thermoplastic polyurethane elastomer is 1-8 wt%, the content of the styrene butadiene rubber is 1-5 wt%, the content of the hydrogenated butadiene-acrylonitrile rubber is 5-10 wt%, and the content of the plasticizer is 1-5 wt%. And the content of the first component is 1-2wt%. The modified asphalt waterproof coiled material provided by the invention has the advantages of strong adhesion, good stretchability and weather resistance and the like.

The invention discloses low-temperature coagulation-accelerating anion styrene-butadiene latex for oil field well cementation and a preparation method of the low-temperature coagulation-accelerating anion styrene-butadiene latex. The low-temperature coagulation-accelerating anion styrene-butadiene latex comprises the following components in parts by mass: 100 parts of anion styrene-butadiene latex raw stock; 4 to 10 parts of a nonionic surfactant I; 2 to 4 parts of a nonionic surfactant II; 10 to 20 parts of water glass; 0.5 to 1 part of a defoaming agent; and 15-20 parts of deionized water. The low-temperature coagulation-accelerating anionic styrene-butadiene latex prepared by the invention is used in cement paste, has short thickening time at low temperature, can resist sodium chloride brine to reach semi-saturation, and can effectively control the water loss of the cement paste, improve the anti-channeling performance of a cement paste system, reduce the elastic modulus of set cement, increase the density of the set cement and improve the stability of the set cement. Therefore, formation gas is effectively prevented from invading cement stone, and well cementation quality is guaranteed.

The invention relates to the field of lithium ion batteries, and particularly discloses an ultrathin high-heat-resistance and high-electrolyte-infiltration fiber-coated diaphragm and a preparation method of the ultrathin high-heat-resistance and high-electrolyte-infiltration fiber-coated diaphragm. An ultrathin fiber-coated diaphragm with high heat resistance and high electrolyte infiltration comprises a base membrane and a coating located on one side or two sides of the base membrane, the coating is formed by curing slurry, and the slurry comprises the following raw materials in parts by weight: 5-30 parts of a binder, 10-100 parts of an inorganic ceramic material, 1-100 parts of nanofibers, 0.1-5 parts of an auxiliary agent, 100-300 parts of a solvent and 0.1-5 parts of a dispersant; the glass transition temperature of the binder is higher than 150 DEG C; the binder is selected from at least one of a modified polyacrylic acid binder, a modified acrylamide binder, a modified polyacrylonitrile binder, a modified styrene butadiene rubber binder and a modified polyvinyl alcohol binder. The fiber-coated diaphragm provided by the invention has high heat resistance and high electrolyte wettability.

The invention discloses a recyclable lawn and a preparation method thereof, and belongs to the technical field of artificial turfs. The lawn sequentially comprises artificial grass yarns, a base cloth layer and a back glue layer from top to bottom, the artificial grass yarns and the base cloth layer are made of polyolefin; the back adhesive layer is prepared from the following components in parts by weight: 4 to 8 parts of polyolefin elastomer, 10 to 20 parts of olefin block copolymer, 20 to 30 parts of hydrogenated styrene-butadiene copolymer, 8 to 12 parts of styrene-isoprene copolymer, 10 to 12 parts of butadiene-styrene rubber, 2 to 6 parts of ethylene-acrylic acid copolymer, 15 to 30 parts of plasticizer, 0.1 to 0.4 part of antioxidant, 3 to 6 parts of compatilizer and 2 to 4 parts of modified filler; according to the lawn, the artificial grass yarns, the base cloth layer and the gum layer are similar in component, so that the lawn can be conveniently and integrally recycled subsequently, the utilization rate of the lawn gum is increased, and resource waste is reduced.

The invention discloses a binder for a secondary battery, negative electrode slurry, a pole piece and a lithium ion battery, the binder for the secondary battery comprises a binder A and a binder B, the binder A comprises a polyacrylic acid polymer, and the binder B comprises styrene butadiene rubber. The two binders are matched, and an effective synergistic effect can be formed between the binders, so that a cross-linked network is formed, cyclic expansion of an active material in an electrode is inhibited, and continuous generation of an SEI film and damage to an electrode structure are avoided.

The invention discloses an SBS (styrene butadiene styrene) modified asphalt aging performance evaluation method, a prediction model and application, relates to a construction method of an SBS modified asphalt aging performance evaluation and prediction model based on multi-scale aging evaluation indexes, and aims to solve the problems that aging evaluation depends on a single-scale index and the prediction precision is insufficient in the prior art. The model is verified by accelerated aging data in a laboratory, the thermo-oxidative aging error is less than or equal to 9.4%, and the ultraviolet aging error is less than or equal to 7.5%. Engineering application: providing road maintenance period suggestions (for example, when the aging time is predicted to be 5 years, detection is recommended once every two years); triggering a material replacement threshold value when the number of honeycomb structures drops to 60% of the initial value; the performance recovery is realized by compounding the new asphalt and the regenerant (the mixing amount is 10-15%). Through multi-scale index collaborative analysis and data modeling, the aging prediction precision is significantly improved, and a scientific basis is provided for asphalt material life evaluation and road maintenance decision.

The invention provides a negative electrode piece, a battery, an energy storage device and electric equipment, the negative electrode piece comprises a negative electrode current collector, at least one surface of the negative electrode current collector is provided with a negative electrode material layer, and the negative electrode material layer comprises a negative electrode material and a negative electrode binder; the negative electrode binder comprises modified styrene-butadiene rubber particles formed by a styrene-butadiene rubber main chain, long-chain unsaturated fatty acid with the carbon chain length of C14-C24 and an anhydride compound; the average particle size of the modified styrene butadiene rubber particles is D50, and D50 is larger than or equal to 190 nm and smaller than or equal to 210 nm.

The invention relates to the field of cable materials, in particular to a wear-resistant modified rubber cable material for a new energy automobile and a preparation method of the wear-resistant modified rubber cable material, and aims to solve the problems that an existing cable material for the new energy automobile is insufficient in wear resistance and mechanical strength, so that a cable is easy to crack, and potential safety hazards are caused. And the use requirements of the new energy automobile in a complex environment are difficult to meet. According to the preparation method, wear-resistant modified rubber, styrene-butadiene rubber and low-density polyethylene are used as matrixes, the comprehensive performance of the cable material is remarkably improved by integrating the advantages of the three materials, and then modified potassium titanate whiskers are added, so that the wear resistance and mechanical strength performance of the cable material are effectively improved; the cable can meet the use requirements of a new energy automobile in a severe environment, shows excellent protection performance, effectively prolongs the service life of the cable, and provides a cable transmission system which is longer in service life, safer and more reliable for the new energy automobile.

The invention belongs to the technical field of emulsified asphalt materials, and particularly relates to a water-resistant emulsified asphalt mixture based on epoxy resin as well as preparation and test methods thereof, and the water-resistant emulsified asphalt mixture comprises the following components in parts by weight: 90-95 parts of aggregate, 3-5 parts of early strength agent, 1-2 parts of water, 2-3 parts of mineral powder and 10-15 parts of modified emulsified asphalt, the modified emulsified asphalt comprises the following components in parts by weight: 45-55 parts of modified asphalt, 3-8 parts of an emulsifier, 20-25 parts of epoxy resin and 15-22 parts of water, wherein the modified asphalt comprises the following components in parts by weight: 80-100 parts of matrix asphalt, 3-5 parts of SBR (Styrene Butadiene Rubber), 2-5 parts of petroleum resin, 1-2 parts of a toughening agent and 5-10 parts of a composite curing agent. Through step-by-step preparation, the mixture has very good low-temperature toughness and mechanical properties, and the water resistance of the material can be improved, so that the emulsified asphalt mixture is applied to a surface layer of an asphalt pavement, and the application scene of the emulsified asphalt mixture is widened.

The invention discloses high-viscosity and high-elasticity asphalt and a preparation method thereof, and relates to the technical field of asphalt materials. The high-viscosity and high-elasticity asphalt is prepared from the following raw materials in parts by weight: 100 parts of matrix asphalt, 5 to 8 parts of a tackifier, 2 to 3 parts of nano montmorillonite, 1.5 to 3 parts of graphene oxide, 8 to 12 parts of modified SBS (Styrene Butadiene Styrene), 0.5 to 1.2 parts of an anti-aging agent and 0.1 to 0.3 part of a cross-linking agent. The high-viscosity and high-elasticity asphalt prepared by the preparation method disclosed by the invention has good elastic recovery rate and ageing resistance.

The utility model relates to the technical field of rubber coiling devices, and discloses an automatic coiling device for styrene butadiene rubber foaming materials, which comprises a rack with a groove, and a reel for coiling materials is rotatably mounted in the groove on the rack. A driving motor used for driving the reel to rotate is installed on one side of the top of the rack, the end, close to the driving motor, of the outer wall of the reel is sleeved with a disc frame, and six stop levers are hinged to the end, away from the driving motor, of the reel. According to the automatic coiling device for the styrene butadiene rubber foaming material, the conical rod is rotationally installed at one end of the reel and used for limiting the material between the conical rod and the disc frame, and when the material needs to be disassembled, only the driving source needs to drive the conical rod to rotate in the direction away from the reel, so that the conical rod is in an inclined downward state; and at the moment, the coiled material is pulled out from the disc frame, the material taking complexity is reduced, the coiled material can rapidly fall, the working efficiency is high, and the working intensity is reduced.

The invention discloses chain end modified liquid rubber, mixed rubber, a preparation process, a tire and a vehicle, and belongs to the technical field of liquid rubber and manufacturing thereof. According to the liquid rubber, butadiene monomers and a chain transfer agent are added in batches in the preparation process, negative ion active centers are frequently transferred to the chain transfer agent from the tail end of a polybutadiene-based lithium active chain to form new initiation growth centers, then newly introduced butadiene monomers are initiated to grow, the dosage of an n-butyllithium initiator is remarkably reduced, and the stability of the liquid rubber is improved. The production cost is greatly reduced, the generation of sewage is greatly avoided, the monomer concentration of the final rubber product can reach about 80 percent by weight, the productivity is improved, and large-scale production is facilitated; the rubber also enables the filler to have good dispersibility, and has good compatibility with base rubber such as styrene butadiene rubber, natural rubber and the like.

The present application relates to a capped, modified solution-styrene butadiene rubber and a preparation method therefor. The method comprises: in a multi-tank continuous reaction process, mixing styrene and butadiene in a solvent, then mixing with a structure modifier and an initiator to copolymerize styrene and butadiene to obtain an intermediate polymer; and performing a capping reaction with a capping monomer to obtain a capped polymer; then reacting with a modifier to obtain a modified polymer; and finally mixing with a terminator to obtain a capped, modified solution-styrene butadiene rubber. Thus, the problem of poor filler dispersibility is improved, which can stabilize the polymer molecular structure and effectively improve the processing performance of a product.

The present application provides an all-steel snow tire tread, consisting of the following raw materials in parts by weight: 50-80 parts of natural rubber, 20-50 parts of solution polymerized styrene butadiene rubber with dual glass transition temperatures, 40-60 parts of carbon black, 10-20 parts of white carbon black with a high specific surface area, 1-2.5 parts of silane coupling agent, 5-10 parts of modified anti-wet skid resin, 2-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of anti-aging agent 4020, 1-3 parts of anti-aging agent RD, 1-3 parts of protective wax, 1-1.8 parts of sulfur, and 1-1.5 parts of promoter NS.

The present invention relates to a bridge surface waterproofing method having excellent waterproofness and constructability. The present invention provides a bridge surface waterproofing method comprising the steps of: evenly preparing the surface of a bridge surface; forming a primer layer on the surface of the bridge surface; forming a waterproofing layer that is from 2 mm to 4 mm by applying a bridge surface waterproofing agent composition onto the primer layer so that the waterproofing layer is inclined in a specific direction of the bridge surface; and forming an asphalt layer on the waterproofing layer, wherein the bridge surface waterproofing agent composition comprises 40 to 60 wt% of asphalt, 5 to 10 wt% of styrene butadiene styrene, 5 to 10 wt% of ethylene glycol dimethacrylate, 3 to 5 wt% of octamethylcyclotetrasiloxane, 5 to 10 wt% of silica particles having an average particle diameter of 200 to 400 nm, 5 to 10 wt% of silica particles having an average particle diameter of 700 to 1000 nm, 3 to 8 wt% of methyl methacrylate, 1 to 3 wt% of 4-hydroxy-3-methoxybenzoic acid, 5 to 10 wt% of a fiber reinforcing material, 1 to 3 wt% of a dispersant, 1 to 3 wt% of a viscosity modifier, and 1 to 3 wt% of a tackifier.

The positive electrode for a lithium-sulfur battery according to the present invention contains a predetermined amount of polyacrylic acid, polyacrylamide, carboxymethyl cellulose, and styrene-butadiene rubber as a binder polymer. When used in a lithium-sulfur battery, the positive electrode for a lithium-sulfur battery can ensure high adhesive strength between the positive electrode active material layer and the positive electrode current collector, and sufficient output performance.

To provide a tire which can improve total performance of anti-wear performance, snow grip performance, and wet grip performance.SOLUTION: A tire has a tread part, wherein the tread part is composed of a rubber composition containing a rubber component, silica, a resin component, and vegetable oil, the rubber component contains 20 mass% or more and 90 mass% or less of styrene-butadiene rubber, the rubber composition contains more than 50 pts.mass and 150 pts.mass or less of silica with respect to 100 pts.mass of the rubber component, the resin component contains at least one selected from the group consisting of a terpene-based resin, a C5C9-based resin, and a dicyclopentadiene-based resin, a glass transition temperature of the rubber composition is -30°C or lower, and when a thickness of a thickest part of the tread part is represented by t (mm), and a styrene content of the styrene butadiene rubber is represented by S (mass%), t×S is less than 300.SELECTED DRAWING: Figure 1

The invention discloses an environment-friendly rubber anti-aging agent and a preparation method thereof.The environment-friendly rubber anti-aging agent is prepared from styrene butadiene rubber, butadiene rubber, white carbon black, calcium carbonate, stearic acid, zinc oxide, white oil, an active agent, an accelerant, a first anti-aging agent and a second anti-aging agent.According to the environment-friendly rubber anti-aging agent, through reasonable raw material selection and proportioning, the performance of rubber is improved, aging is delayed, and the service life of the rubber is prolonged; the rubber composition and the rubber product have excellent discoloration resistance, excellent fatigue resistance, excellent ozone resistance and excellent mechanical properties before aging and after thermo-oxidative aging at the same time, are used for manufacturing a tire part rubber matrix, and are particularly used as a tire sidewall rubber composition.

The application provides a high-styrene solution polymerized styrene-butadiene rubber and a preparation method and application thereof, and the preparation method comprises the following steps: mixing styrene, butadiene, an initiator, a structure regulator and a non-polar solvent, and performing a polymerization reaction to obtain solution polymerized styrene-butadiene rubber; wherein the structure regulator comprises at least two of t-butoxy sodium, t-amyl oxy sodium, 2,3-dimethyl-3-pentanol sodium and ethylene glycol disodium, and a crown ether. By using the composite structure regulator, the application can prepare a random high-styrene content solution polymerized styrene-butadiene rubber, and the rubber almost does not contain styrene blocks, and the content of vinyl in the rubber can be adjusted by the addition amount of the structure regulator. Therefore, the solution polymerized styrene-butadiene rubber prepared by the application has good strength and hardness due to the high styrene content, and the random microstructure reduces the glass transition temperature and heat build-up of the raw rubber, and is suitable for the manufacturing of high-performance tires such as new energy vehicle tires.

The application discloses an electrode for an energy storage device. The electrode includes an active layer. The active layer comprises a network structure formed by carbon elements with high aspect ratio, the carbon elements define void spaces in the network, electrode active material particles are distributed in the void spaces in the network, and the active material particles comprise silicon and a polymer additive. The polymer additive comprises at least one of polyolefin, polyacrylic acid or styrene butadiene rubber (SBR).

The invention relates to a modified asphalt sizing material, which is prepared from the following components in percentage by weight: 35.5 to 38.5 percent of 70 # asphalt, 6.5 to 9.5 percent of base oil, 4.5 to 5.5 percent of aromatic oil, 3.5 to 4.5 percent of SBS (Styrene Butadiene Styrene), 5.5 to 6.5 percent of SIS (Styrene Isoprene Styrene), 5.5 to 6.5 percent of SBR (Styrene Butadiene Rubber) powder, 1.9 to 2.1 percent of blocked isocyanate, 0.06 to 0.08 percent of activating agent, 4.5 to 5.5 percent of porous silicon dioxide and 24 to 30 percent of powder. The modified asphalt sizing material can trigger the activating agent to catalyze the deblocking of the blocked isocyanate at the processing temperature of 180 + / -2 DEG C to release-NCO groups, the-NCO groups can react with trace moisture in an asphalt system to generate CO2 gas, in the rubber layer forming process, CO2 is wrapped by the asphalt in a viscoelastic state to form a uniform closed-cell foam structure, and in the forming process of a rubber layer, the modified asphalt sizing material can be used for forming an asphalt layer. According to the structure, liquid water permeation is blocked by utilizing the characteristic that the surface tension of liquid water is greater than that of a bubble wall, and an initial channel is constructed for vapor diffusion; furthermore, closed-cell foam is bridged by utilizing nano-pores of porous silicon dioxide, a'nano-pore adsorption-micropore diffusion 'three-dimensional vapor-permeable network is constructed, diffusion and discharge of water vapor are accelerated, liquid water is further blocked, and dynamic balance of waterproofness and breathability is realized.

The invention discloses a high-temperature-resistant hot-melt pressure-sensitive adhesive based on SBR (Styrene Butadiene Rubber) and SBS (Styrene Butadiene Styrene) high-temperature thermal crosslinking and a preparation method thereof, and belongs to the technical field of hot-melt pressure-sensitive adhesives. The high-temperature-resistant hot-melt pressure-sensitive adhesive comprises the following components in parts by weight: 20-40 parts of SBR; 15 to 30 parts of SBS (styrene butadiene styrene); 30 to 50 parts of tackifying resin; 5 to 15 parts of a softening agent; and 0.5 to 2 parts of an antioxidant. According to the invention, through a specific polymer combination, a thermal cross-linking reaction is carried out at a high temperature, so that the high-temperature resistance is remarkably improved, and meanwhile, good flexibility and adhesive power to a plurality of substrates are kept. According to the invention, the convenient coating process of the hot-melt pressure-sensitive adhesive is maintained, the temperature resistance limit of the traditional product is broken through, and the adhesive has obvious application advantages in the scenes of new energy automobile battery pack fixation, engine compartment wire harness binding and the like.

The application discloses a preparation method of PPTA nanometer microsphere styrene butadiene rubber composite material, which comprises the following steps: 1) styrene butadiene rubber is added into a mixed solvent of cyclohexanone and N-methyl pyrrolidone, and heated and stirred until the styrene butadiene rubber is completely dissolved to obtain a transparent solution; 2) part of the transparent solution is taken, p-phenylenediamine and lithium chloride are added, and stirring is uniformly carried out to obtain solution A; p-phenylenediamine chloride is added into the remaining transparent solution, and stirring is uniformly carried out to obtain solution B; under the condition of nitrogen atmosphere and ice water bath, solution B is slowly dropped into solution A, and stirring reaction is carried out at room temperature to obtain a light brown solution; 3) deionized water is added into the light brown solution, and after stirring, filtration and washing, and drying, the PPTA nanometer microsphere styrene butadiene rubber composite material is obtained. The in-situ solution condensation method and the bottom-up method are combined to synthesize the PPTA nanometer particles which are uniformly dispersed in the rubber matrix, and the surface effect, the quantum size effect and the macroscopic quantum tunnel effect endow the composite material with high strength, high toughness, high impact resistance and other performances.

The invention discloses a synthesis device and a synthesis method of a modified styrene butadiene emulsion, and the invention relates to the technical field of adhesive production. The invention comprises a reactor, a synthesis device and a synthesis method of a modified styrene butadiene emulsion, a stirring blade assembly can be driven by a gear ring mechanism to reciprocate up and down while stirring the material axially, and can achieve the effect of turning the upper layer material and the lower layer material while stirring the material, solving the problem that the stirring blade of the stirring device in the current reactor is fixedly installed on the stirring shaft and cannot move up and down, making the stirring action flexible and changeable, and the upper layer and the lower layer material in the reactor can be quickly mixed, saving the mixing and stirring time. The gear and the gear ring mechanism are meshed to realize the synchronous revolution and rotation, which can greatly improve the stirring efficiency, and the reciprocating motion of the piston plate is realized by the stirring blade rotating and cooperating with the jacking assembly, and there is no need to set a driving device for the movement of the piston plate separately, making the structure simpler.

The invention discloses a heat-preservation, sound-insulation and moisture-proof composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The heat-preservation, sound-insulation and moisture-proof composite material is prepared from the following raw materials in parts by weight: 60 to 65 parts of PVC (Polyvinyl Chloride), 15 to 20 parts of SBS (Styrene Butadiene Styrene), 2 to 5 parts of plasticizer, 8 to 12 parts of modified flexibilizer, 1 to 2 parts of anti-aging agent, 2 to 5 parts of modified coupling agent, 8 to 10 parts of ceramic hollow microbeads, 5 to 8 parts of nano silicon dioxide and 5 to 10 parts of flame retardant. The modified toughening agent is prepared by reacting 1, 4-benzene diboronic acid with polyethylene glycol to generate a hyperbranched product; and then reacting with 4, 4 '-methylene bis (phenyl isocyanate) to obtain the product. The prepared heat-preservation, sound-insulation and moisture-proof composite material has excellent impact resistance and heat-preservation, sound-insulation and moisture-proof performance.

The present invention relates to the field of catalytic hydrogenation, and specifically relates to a method for preparing hydrogenated styrene-butadiene-styrene block polymer by using palladium-nickel carbonized resin as a catalyst. The technical key points are as follows: A method for preparing hydrogenated styrene-butadiene-styrene block polymer by using palladium-nickel carbonized resin as a catalyst, characterized in that carbonized resin is used as a carrier, and a palladium-nickel catalyst is loaded to form a palladium-nickel resin type hydrogenation catalyst. The elastomer SBS is catalytically hydrogenated by using this catalyst to obtain a hydrogenated styrene-butadiene-styrene block polymer, and the catalyst contains hydroxyl groups. The preparation process of the present invention follows the tenet of green chemistry, uses a heterogeneous catalyst to prepare SEBS with high hydrogenation degree and high selectivity, and solves the problems of poor selectivity of the catalyst, difficult separation, short lifespan, difficult product treatment, and complex process in the preparation of SEBS by traditional homogeneous catalysts.

The present application relates to the field of materials. Provided are a graphite negative electrode material, a preparation method therefor, a lithium ion battery and an electrical device. The preparation method for the graphite negative electrode material comprises: graphitizing a coke feedstock, so as to obtain a graphite aggregate; mixing asphalt with a polymer modifier, and carrying out a first heat treatment in a protective atmosphere, so as to obtain modified asphalt, the polymer modifier comprising one or more of a styrene-butadiene-styrene block copolymer, a hydrogenated styrene-butadiene block copolymer, an ethylene-vinyl acetate copolymer, styrene butadiene rubber, a styrene-isoprene copolymer and a styrene-ethylene-butylene-styrene block copolymer; mixing the graphite aggregate with the modified asphalt, and then carrying out a second heat treatment for granulation, so as to obtain a precursor; and carrying out a third heat treatment on the precursor, and performing screening and demagnetization, so as to obtain the high-energy-density and fast-charging graphite negative electrode material. The graphite negative electrode material obtained by the method provided by the present application has high energy density and superfast-charging performance.

The invention relates to an anti-aging latex which is prepared from the following components: styrene-butadiene latex, 5-amino-1, 3-indoline-2-ketone, diphenyl acetic anhydride, dichloromethane, triethylamine, a NaOH solution, an antioxidant and a preservative. The invention also relates to a processing technology of the anti-aging latex. The styrene-butadiene latex adopted in the invention has good anti-aging performance; the nitrogen heterocyclic ring carried by the 5-amino-1, 3-indolin-2-one can capture free radicals, prevent the free radicals from further initiating fracture and crosslinking of polymer chains, and delay aging; the preparation method comprises the following steps: adding diphenyl acetic anhydride to carry out acylation reaction with amino of 5-amino-1, 3-indoline-2-ketone, and hydrolyzing by using a NaOH solution to obtain carboxylic acid, so that the obtained product carries a side chain with large steric hindrance, oxygen molecules are effectively inhibited from approaching parts which are easily attacked, and the aging process is slowed down; the carboxyl group can increase the polarity, reduce the density of electron cloud in the ring or homogenize the electron cloud, and improve the aging resistance.

To provide a tire for improving total performance of on-ice performance and wet grip performance.SOLUTION: A tire comprising a tread portion, the tread portion being formed from a rubber composition containing a rubber component, a filler containing silica, and a plasticizer, the rubber component containing more than 5% by mass and less than 50% by mass of a styrene-butadiene rubber, the rubber component contains an isoprene-based rubber and / or a butadiene rubber, a total content of the isoprene-based rubber and the butadiene rubber in the rubber component is more than 50% by mass, and a total styrene content S (% by mass) in the rubber component is less than 10, A content of the silica is more than 50 parts by mass based on 100 parts by mass of rubber components, the plasticizing agent contains C5 resins and / or C9 resins, a total content P (parts by mass) of the plasticizing agent is more than 40 parts by mass based on 100 parts by mass of the rubber components, and the tread portion includes two or more circumferential grooves and two or more lateral grooves, and one or more blocks defined by the circumferential grooves and the lateral grooves.SELECTED DRAWING: Figure 1