2263 results about "Butadiene Dioxide" patented technology

The invention discloses a far-infrared high-transmittance composite material, a preparation method thereof and an optical device, and the far-infrared high-transmittance composite material comprises the following components in parts by weight: 70-99 parts of a polymer matrix; 1-30 parts of an anti-reflection auxiliary agent; the polymer matrix is a sulfur-containing polymer prepared by polymerization reaction of a polymeric monomer and sulfur, and the proportion of carbon-carbon unsaturated bonds is less than 3%; the polymeric monomer is selected from at least one of a vinyl monomer, a propenyl monomer, an acrylic acid monomer, a methacrylic acid monomer, an epoxide monomer, a thiopropyl ring monomer, an alkynyl monomer, a butadiene monomer, an isoprene monomer and a norbornene monomer; the anti-reflection auxiliary agent comprises at least one of nano zinc sulfide, nano zinc selenide, nano calcium fluoride, nano magnesium fluoride and nano magnesium oxide. The composite material and the optical device thereof have high far infrared transmittance and good mechanical properties and processability, and can meet the requirements of various far infrared optical fields.

The present invention provides an electrolyte-resistant hot melt tape, which comprises a PET substrate and a rubber hot melt adhesive layer coated on its surface. The rubber hot melt adhesive layer comprises the following components in parts by weight: 60-160 parts of styrene-butadiene rubber, 10-40 parts of maleic anhydride-modified polyolefin, 1-5 parts of epoxy curing agent, 10-40 parts of hydroxyl-terminated liquid polybutadiene, 1-5 parts of polyisocyanate curing agent, and 20-60 parts of rosin tackifying resin. The rubber hot melt adhesive layer of the electrolyte-resistant hot melt tape is tightly compounded with the polar PET substrate. At the same time, the moderate cross-linking between the components of the rubber hot melt adhesive layer can reduce the infiltration of the electrolyte, so that the electrolyte-resistant hot melt tape has excellent bonding strength before and after being immersed in the electrolyte, does not bubble or delaminate, improves the passing rate of the battery drop test, meets the requirements of the lithium battery industry for tape products, and improves the battery safety factor.

The invention relates to the technical field of polyvinyl chloride, and discloses a preparation process of a high-strength and high-thermal-stability PVC (polyvinyl chloride) material for a decorative film, which comprises the following steps: mixing polyvinyl chloride, acrylonitrile-butadiene-styrene copolymer, cyano polyesteramide, a stabilizer, a plasticizer, an antioxidant and the like, extruding in a twin-screw extruder, and granulating, the PVC material with high strength and high thermal stability is obtained. The cyano polyesteramide can improve the compatibility between ABS and PVC, so that the material has better mechanical properties, the polyesteramide has a hyperbranched molecular chain structure and plays a certain role in toughening, the compatibility between ABS and PVC is better, the vicat softening temperature of the material is increased, the thermal stability of the material is enhanced, and when the cyano polyesteramide is applied to materials such as decorative films, the material has better mechanical properties. Decorative films and the like can have good heat resistance and are not prone to aging and yellowing.

The invention relates to the technical field of waterproof coiled materials, and provides a macromolecule waterproof coiled material with a hook-and-loop fastener and a preparation method thereof.The macromolecule waterproof coiled material with the hook-and-loop fastener sequentially comprises the hook-and-loop fastener, a macromolecule sheet layer, a blocking layer, an upper gluing waterproof layer, a film-based macromolecule layer, a lower gluing waterproof layer and an anti-sticking layer from top to bottom; the upper adhesive waterproof layer and the lower adhesive waterproof layer are both modified self-adhesive asphalt sizing materials, and the modified self-adhesive asphalt sizing materials comprise asphalt, softening agents, styrene-butadiene-styrene block copolymers, butadiene styrene rubber, butyl rubber, tackifying resin, desulfurized rubber powder, filler and compatilizers. The filler is prepared from the following raw materials: carbon black, silicon dioxide, a silane coupling agent and 5-methylphenol-2-calcium sulfonate; the hook-and-loop fastener is a hook-and-loop fastener, the hook-and-loop fastener comprises a hook-and-loop fastener hook surface layer and a hook-and-loop fastener loop surface layer, and by means of the technical scheme, the problem that in the prior art, the high polymer waterproof roll is low in peel strength is solved.

The invention relates to the technical field of ABS (Acrylonitrile Butadiene Styrene) materials, in particular to an impact-resistant composite ABS plate and a preparation method thereof. The impact-resistant composite ABS plate is prepared from the following raw materials in parts by mass: 100 to 200 parts of emulsion ABS resin, 10 to 20 parts of butadiene monomer, 5 to 10 parts of methyl methacrylate, 1 to 5 parts of glycidyl acrylate, 1 to 5 parts of maleic anhydride, 5 to 15 parts of styrene, 1 to 5 parts of aminated silicon dioxide, 0.1 to 0.5 part of benzoyl peroxide, 0.1 to 0.3 part of triethylamine, 0.1 to 1 part of emulsifier and 0.01 to 0.1 part of first initiator, 0.05-0.2 part of a second initiator, 1-3 parts of oxidized polyethlene wax, 1-2 parts of a lubricant and 1-3 parts of an antioxidant. The invention solves the contradiction between the heat resistance and impact strength of the ABS resin, has obvious advantages compared with the traditional modification system, and completely meets the application requirements of the plate in a high-temperature vibration environment.

The invention discloses a composite material template prepared from a recycled PC template and a production process of the composite material template, and belongs to the technical field of polycarbonate composite materials. The composite material template prepared from the recycled PC template comprises the following components in parts by weight: 5-15 parts of a PC template recycled material, 60-80 parts of polycarbonate, 5-10 parts of a compatilizer, 2-5 parts of MBS, 5-8 parts of butadiene rubber, 10-20 parts of modified glass fibers, 2-5 parts of a dispersing agent, 0.5-1 part of an antioxidant and 0.2-0.5 part of an optical stabilizer. Through the matching effect of the specific compatilizer, MBS, butadiene rubber and modified glass fiber, on one hand, on the basis that the specific compatilizer is added to improve the compatibility of the composite material, the mechanical property of the composite material is not lost; and on the other hand, butadiene rubber, MBS and modified glass fibers are matched to improve the mechanical property of the composite material, so that the PC template reclaimed material is fully utilized to prepare the composite material template with good performance.

The invention belongs to the field of water treatment, and particularly relates to a graphene-based quinone mediator membrane as well as a preparation method and application thereof. The graphene-based quinone mediator membrane comprises a membrane matrix, and graphene, amino imidazopyridine and humus which are dispersed in the membrane matrix, the membrane substrate is made of polyvinylidene fluoride / butadiene, the polyvinylidene fluoride / butadiene is a random copolymer of polyvinylidene fluoride and butadiene, and an anthraquinone modification unit is bonded on a butadiene structural unit of the random copolymer. The graphene-based quinone mediator membrane provided by the invention has very high initial denitrification rate and over-time denitrification rate.

A joint member having a thermoplastic elastomer composition including components (A), (B), and (C). Component (A): a hydrogenated product of a block copolymer including at least two polymer blocks composed primarily of a vinyl aromatic compound and at least one polymer block including butadiene, wherein, in the hydrogenated product of the block copolymer, a proportion of a hydrogenated product (A1) of a block copolymer having a weight-average molecular weight of 300,000 or more is 30% to 100% by mass, Component (B): a hydrocarbon rubber softener, Component (C): a polypropylene resin, Component (D): a crosslinking agent.

The invention discloses an ether polymerization inhibitor special for a butadiene extraction system and a preparation method of the ether polymerization inhibitor. The ether polymerization inhibitor comprises the following raw materials: a polymerization inhibitor intermediate, a solvent and a dispersing agent, the production process comprises the following steps: preparing a polymerization inhibitor intermediate, preparing a solvent, compounding, feeding and mixing, filtering, removing impurities and detecting. According to the method, firstly, a polymerization inhibitor 701 and diethylene glycol normal pressure etherification process is adopted, and beta-hydroxyethyl methyl ether is introduced to seal a terminal group, so that the power consumption is reduced, the generation of byproducts is inhibited, the solubility of an intermediate acetonitrile is improved to be greater than or equal to 30g / L, and the anti-interference performance is greatly enhanced; the solvent doped with a small amount of silane modified nano diatomite is prepared, impurities can be adsorbed, metal ions can be chelated, the dispersing agent can be assisted to be evenly distributed, the problems that a pure water solvent is single in function and the dispersing agent is prone to agglomeration are solved, and the polymerization inhibition efficiency and the stability of an extraction system are guaranteed.

The invention relates to the technical field of macromolecules, in particular to a ceramic flame-retardant PC / ABS alloy material and a preparation method thereof. Comprising the following raw materials in parts by weight: 55-65 parts of polycarbonate, 30-40 parts of an acrylonitrile-butadiene-styrene copolymer, 0.1-1 part of a compatilizer, 0.1-1 part of a flexibilizer, 1-10 parts of ceramic powder, 3-8 parts of an inorganic composite nano filler, 1-10 parts of a flame retardant, 0.1-1 part of a silane coupling agent and 0.1-0.5 part of an antioxidant. The preparation method of the ceramic flame-retardant composite material mainly comprises the following steps: drying the raw materials, uniformly mixing the raw materials, processing and extruding, and carrying out injection molding, and by adopting the synergistic effect of the ceramic powder and the flame retardant, the PC / ABS alloy material is endowed with excellent flame retardance while good mechanical properties of the PC / ABS alloy material are ensured.

The invention discloses a hard asphalt mixture and a preparation method thereof, and belongs to the technical field of road engineering materials. Aiming at the problems of insufficient strength, stability and durability of the existing hard asphalt mixture, the method comprises the following steps: grading and mixing basalt and diabase composite coarse aggregate, medium aggregate with a specific ratio, fine aggregate containing basalt mineral fibers and limestone mineral powder; the preparation method comprises the following steps: heating to 175-185 DEG C, adding modified asphalt prepared by shearing and blending matrix asphalt and a styrene-butadiene-styrene block copolymer modifier, carrying out dry mixing and wet mixing, scattering lignin fibers, and carrying out thermal insulation aging and three-stage compaction molding. Wherein the rotating speed and time of dry mixing and wet mixing are controlled, the compaction is divided into initial pressing, re-pressing and final pressing stages, and different pressures are set. According to the preparation method, the performance of the mixture is improved by optimizing aggregate composition, a modified asphalt process and mixing and compacting parameters, and the preparation method is mainly used for road engineering construction with high requirements on pavement strength and stability.

The invention relates to the technical field of polypropylene plastics, and particularly discloses a preparation method of a high-toughness polypropylene plastic bucket, which comprises the following steps: dissolving benzoyl peroxide in toluene, adding an organic silicon prepolymer with double bonds at one end, and uniformly mixing to prepare a mixed solution; adding polypropylene K8003 and polypropylene Z30S into a high-speed mixer, adding the mixed solution, and mixing at 105-120 DEG C for 5-15 minutes to obtain a mixture; carrying out extrusion granulation on the mixture to obtain modified polypropylene; adding the obtained modified polypropylene, PP-g-MAH, a hydrogenated styrene-butadiene block copolymer, vinyl-terminated silicone oil, modified titanium dioxide and an antioxidant into a high-speed mixer for mixing, performing extrusion granulation, and finally performing injection molding to obtain the high-toughness polypropylene plastic bucket. The polypropylene plastic bucket is prepared by combining the polypropylene K8003, the polypropylene Z30S, the modified titanium dioxide, the antioxidant, the PP-g-MAH, the hydrogenated styrene-butadiene block copolymer and other components, and the components interact with one another, so that the toughness and the impact resistance of the polypropylene plastic bucket are improved.

The invention discloses a copper-clad plate material containing elastomer resin and a preparation method of the copper-clad plate material, and belongs to the technical field of new materials. The method comprises the following steps: mixing a styrene-butadiene-styrene block copolymer with polybutadiene rubber, adding nano-montmorillonite, and carrying out intercalation modification through hexadecyl trimethyl ammonium bromide to prepare nano-modified elastomer resin; the preparation method comprises the following steps: mixing polybutylene terephthalate with nano silicon dioxide, and carrying out surface modification by gamma-aminopropyltriethoxysilane and hexamethyldisilazane to obtain a resin matrix; mixing the two phases, adding citric acid, and carrying out microwave heating and high-shear dispersion to obtain a discrete material; carrying out hot pressing on the dispersion, adding polyurethane and polylactic acid, uniformly mixing, adding polydimethylsiloxane and sodium dodecyl benzene sulfonate, and curing to obtain a cured product; and coating the surface of the cured product with a nano-copper layer. The material has the characteristics of high peel strength, low dielectric loss, low water absorption and low thermal expansion, and is suitable for the field of high-speed low-loss copper-clad plates.

The invention discloses a high-strength, low-temperature-resistant and aging-resistant polymer rubber material and a preparation method thereof in the technical field of rubber materials. The high-strength, low-temperature-resistant and aging-resistant polymer rubber material comprises the following components in parts by weight: 100-120 parts of a rubber matrix, 44-62.5 parts of an interface auxiliary agent, 8-15 parts of a vulcanization system, 4-5 parts of a protection system and 8-12 parts of a toughening agent. According to the invention, a multi-component synergistic system is constructed by the multifunctional reinforcer, amino-terminated polysiloxane, amino-terminated polybutadiene and epoxidized soybean oil, and meanwhile, a carbon black / Si-69 interface assistant and a protection / vulcanization system are optimized, so that the synergistic improvement of mechanical properties, low temperature resistance and aging resistance is achieved; the technical problems that traditional rubber is single, excellent in performance and unbalanced in comprehensive performance are solved.

The invention discloses polybutadiene latex, a preparation method thereof and transparent ABS (Acrylonitrile Butadiene Styrene) resin. In the preparation process of the polybutadiene latex, the emulsifier is additionally added at a relatively high conversion rate to promote the reaction to generate part of latex particles with small particle sizes. When the latex prepared by the method is used for further preparing the transparent ABS resin, since the latex with the particle size of 30-70nm has a rayleigh scattering effect to a certain extent, a small amount of blue light can be scattered, so that the yellow index of the resin is reduced, and the prepared transparent ABS has better hue.

The invention belongs to the technical field of chemical engineering, particularly relates to a preparation method and a preparation device of electronic-grade hexafluorobutadiene, and aims to provide a brand-new hexafluorobutadiene synthesis route which can fundamentally solve the bottleneck problem in the existing hexafluorobutadiene production or preparation method. According to the preparation method, chlorotrifluoroethylene is taken as a main raw material, and the electronic grade 4N hexafluorobutadiene meeting the application of the semiconductor industry is prepared through two steps of catalytic polymerization and finished product rectification. The process raw materials and the device are high in utilization rate, impurities such as heptafluorobutene and hexafluorocyclobutene which are difficult to purify do not exist, the quality of the produced finished product can be effectively guaranteed under the condition that the cost is low, and then the technology is more competitive.

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 belongs to the technical field of copper-clad plate materials, and relates to a high-speed high-frequency low-CTE copper-clad plate glue solution as well as a preparation method and application thereof, the copper-clad plate glue solution comprises 55-135 parts of a resin composition, 2.5-21 parts of a cross-linking agent, 0.05-1.5 parts of a cross-linking accelerant, 11-54 parts of filler and 38-95 parts of a solvent; the resin composition is prepared from 25 to 45 parts of polyerylene resin, 15 to 35 parts of styrene-butadiene polymer, 15 to 30 parts of bismaleimide and 10 to 25 parts of allyl-terminated polyphenyl ether resin. According to the invention, Dk and Df meet the requirement of ultra-low loss and are greatly improved compared with the traditional PPO system, and meanwhile, the Z-axis CTE is reduced by more than 40%; the halogen-free flame-retardant design meets the environment-friendly requirement, and the high-frequency performance is not influenced; and a standard PCB processing technology is compatible, and the copper-clad plate suitable for 5G millimeter wave communication, automatic driving radar and satellite high-frequency circuits is prepared.

The invention discloses a composite material with a shielding function, a preparation method thereof and an interphone shell. The composite material comprises a polycarbonate-acrylonitrile-butadiene-styrene copolymer, a modified conductive filler, maleic anhydride grafted polyethylene, polyaryletherketone, a flame retardant, an antioxidant, glass microfibers and a compatilizer, wherein the modified conductive filler is aluminum oxide ceramic particles subjected to chemical copper plating and graft polymerization treatment. The preparation method comprises the steps of modified conductive filler preparation, step-by-step raw material mixing, twin-screw extrusion granulation and drying. The interphone shell is prepared from the composite material through injection molding, and the injection molding process comprises the steps of raw material drying, injection molding machine preheating, charging and injection molding, and demolding and finishing. The composite material is stable in electromagnetic shielding performance and has good mechanical strength and heat resistance; the preparation method can improve the dispersity of the components and is adaptive to conventional equipment; the interphone shell can block electromagnetic wave interference, is suitable for being used in multiple environments, and meets the requirements of an electronic equipment shell for shielding and structural performance.

The invention discloses a preparation method of a high-barrier aluminum oxide composite film for food packaging, and relates to the technical field of food packaging materials. The high-barrier aluminum oxide composite film for food packaging comprises the following raw materials in parts by weight: a barrier layer: 60-90 parts of modified nano aluminum oxide and 20-30 parts of a silane coupling agent KH-560; the functional layer is prepared from the following components in parts by weight: 18 to 28 parts of nano silver, 16 to 22 parts of compound antioxidant and 4 to 10 parts of nano titanium dioxide; the heat sealing layer is prepared from 22 to 32 parts of modified polylactic acid, 2 to 6 parts of graphene quantum dots, 12 to 16 parts of methyl methacrylate-butadiene-styrene copolymer, 3 to 6 parts of dodecyl trimethyl ammonium chloride, 10 to 14 parts of resorcinol tetraphenyl diphosphate and 7 to 17 parts of stearic acid intercalation modified nano montmorillonite. The high-barrier aluminum oxide composite film for food packaging is prepared by modifying nano aluminum oxide and polylactic acid, the barrier ability to gas, water vapor and ultraviolet rays is greatly improved, and the high-barrier aluminum oxide composite film is oil-resistant and antistatic. The product is high in mechanical strength, high in processing adaptability, capable of adapting to complex scenes, environment-friendly and safe.

The invention relates to anti-abnormal-sound low-noise ABS (acrylonitrile butadiene styrene) and a preparation method thereof. The anti-abnormal-sound low-noise ABS is prepared from the following raw material components: ABS resin, modified ceramic hollow microspheres, modified polyacrylate and auxiliaries, wherein the modified ceramic hollow microspheres are polymers obtained by grafting hydroxylated ceramic hollow microspheres with KH-570 and then polymerizing the grafted hydroxylated ceramic hollow microspheres with sodium acrylate; the modified polyacrylate is obtained by polymerizing sodium acrylate, butadiene, styrene and tetradecyl acrylate. According to the invention, the ABS resin, the modified ceramic hollow microspheres and the modified polyacrylate are compounded; compared with the prior art, the composite material disclosed by the invention has the advantages of good compatibility among various components, high bonding strength, effective reduction of noise and abnormal sound, guarantee of the mechanical strength of the composite material, solving of the problems in the prior art, and good application prospect.

The invention discloses an SBS modified asphalt regenerant, regenerated asphalt and a preparation method, and belongs to the technical field of road engineering. The invention solves the problems that the regeneration effect is poor and the high-value utilization of the aged asphalt and the asphalt mixture is difficult to realize when the regenerated asphalt is prepared only by doping the base oil at present. The styrene-butadiene-styrene block copolymer composition comprises the following components in parts by weight: 80-100 parts of styrene-butadiene-styrene block copolymer; 35 to 50 parts of epoxidized soybean oil; 5 to 8 parts of bis (2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane; and 14 to 20 parts of low density polyethylene. The purpose of recovering the high-temperature performance and the low-temperature performance of the SBS modified asphalt can be achieved.

The invention discloses a method for preparing 1, 3-butadiene, and the method comprises the following steps: enabling a raw material containing gamma-valerolactone to be in contact and react with a catalyst to obtain the 1, 3-butadiene, the catalyst is a hydrogen type molecular sieve with a ten-membered ring topological structure, and the typical topological structure types of the catalyst comprise FER, TON, MTT, EUO, * MRE, MEL and MWW. In a fixed bed reactor, gamma-valerolactone is taken as a raw material and passes through the reactor from top to bottom. The target product 1, 3-butadiene can be efficiently prepared under the condition of 300-450 DEG C by using the catalyst.

The invention discloses special mute cotton for tires, which comprises a mute layer and a back adhesive tape, and the back adhesive tape is prepared from the following substances in parts by mass: 80-100 parts of styrene-butadiene-styrene block copolymer, 50-60 parts of tackifier, 20-30 parts of naphthenic oil, 5-15 parts of adsorbent, 1-2 parts of antioxidant 1520 and 1-2 parts of cross-linking agent. The prepared mute cotton does not need laser treatment and polishing, can effectively absorb a release agent on the inner wall of a tire, the bonding effect can reach cohesive failure of a self-adhesive layer, revolutionary change is achieved, tire agents, tire stores and even vehicle owners can operate the mute cotton by themselves, equipment assistance is not needed, construction is simple, cost is low, and large-scale popularization can be achieved.

The invention belongs to the technical field of asphalt preparation, and provides a high-modulus composite modified asphalt material based on natural asphalt and a preparation method thereof. The method comprises the following steps: separating natural asphalt into a high-molecular asphaltene section and a medium-low-molecular colloid section, and preparing activated asphaltene and colloid sections through alkali treatment and spray drying; a styrene-butadiene-styrene block copolymer and a polyurethane prepolymer are taken as the basis, and a dynamic cross-linked polymer is synthesized through the steps of hydrazide treatment, boric acid group introduction, glutaraldehyde cross-linking and the like; organic modified clay and phenylated chitosan are prepared, a polyaniline composite material is prepared through in-situ polymerization of aniline, a PANI-clay-biomass compound is obtained, the ultraviolet absorption characteristic of polyaniline and the shielding effect of montmorillonite cooperate, the ultraviolet aging resistance of the material is improved, through multi-stage temperature control dispersion, the anti-aging performance of the material is improved, and the anti-aging performance of the material is improved. The various modified materials are compounded with a natural asphalt substrate to obtain the high-modulus composite modified asphalt material based on the natural asphalt.

The invention provides a tire tread rubber composition with high bio-based content. The composition is prepared from the following raw materials in parts by weight: 10-40 parts of natural rubber; 0 to 30 parts of modified polystyrene-butadiene rubber; 50 to 80 parts of bio-based itaconate rubber; 5 to 20 parts of bio-based carbon black; 50-90 parts of rice hull ash white carbon black; 0-20 parts of biological base oil; 4-8 parts of a bio-based silane coupling agent; 5-30 parts of bio-based wet skid resistant resin; according to the composition, bio-based resources are used as main raw materials, dependence on petroleum resources is reduced, and carbon emission in the production process is reduced; the rubber composition basically does not contain harmful chemical substances, and is safer and more reliable to use.

An olefin production system (1) comprises: a reactor (10) that generates water and a hydrocarbon, which contains a lower olefin, from a feedstock containing hydrogen and carbon dioxide and / or carbon monoxide; a first gas-liquid separation tank (20) that separates the product generated by the reactor (10) into a gas containing the lower olefin and a liquid containing water and a hydrocarbon that contains the lower olefin; and a second gas-liquid separation tank (30) that is connected to the first gas-liquid separation tank (20) and separates the gas containing the lower olefin from the liquid transferred from the first gas-liquid separation tank (20). The lower olefin contains at least one substance selected from the group consisting of ethylene, propylene, butene and butadiene.

The invention relates to the technical field of high polymer material modification, in particular to a top whitening resistant polypropylene composite material as well as a preparation method and application thereof. The top whitening resistant polypropylene composite material is prepared from the following components in parts by weight: 60 to 80 parts of polypropylene resin, 20 to 30 parts of talcum powder, 5 to 15 parts of hydrogenated styrene-butadiene-styrene block copolymer, 0.1 to 0.5 part of beta crystal form nucleating agent, 3 to 8 parts of maleic anhydride grafted polypropylene, 0.3 to 1 part of composite antioxidant and 0.5 to 2 parts of zinc stearate. Through the synergistic effect of the hydrogenated styrene-butadiene-styrene block copolymer toughening system and the beta crystal form nucleating agent in a specific formula, high rigidity (the filling amount of talcum powder reaches 20-30 parts) is kept, and meanwhile, the top whitening resistance of the composite material is remarkably improved; the method is suitable for parts such as automobile dashboards and door plates which have strict requirements on surface quality.

The invention relates to the technical field of electronic materials, and discloses a nano-structure-based flexible electronic material preparation method, which comprises: 1, dissolving 80-85% of a hydrogenated styrene-butadiene block copolymer (SEBS) in a tetrahydrofuran (THF) and N-methyl pyrrolidone (NMP) mixed solvent to form a matrix solution; 2, 12%-15% of functionalized graphene (EGO-PP) with the surface grafted with PEDOT: PSS is added into the matrix solution, and ultrasonic-shearing synergistic dispersion treatment is carried out; and step 3, performing programmed cooling control on the dispersion system, and cooling from 80 DEG C to 25 DEG C in stages to complete nano-network self-assembly. Matching ([delta] [delta] t; compared with the prior art that a blending method depends on high filler loading, the method provided by the invention has the advantages that a three-dimensional interpenetrating conductive network is formed by the functionalized graphene under the ultralow content of 1.8 vol% by using an ultra-low (0.5, 0.5) and Spinodal decomposition mechanism, and compared with a blending method which depends on high filler loading, the core contradiction of material embrittlement caused by high filler concentration is solved, and the flexibility is improved by 240% or above under the same conductivity.

The invention relates to a hot melt adhesive composition comprising a polymer component, the polymer component comprising at least one styrene-butadiene-styrene block copolymer P having a styrene content from 35 to 50% by weight: a styrene-butadiene diblock content from 50 to 80% by weight; and a viscosity of a 15% by weight toluene solution at 25° C. of 20 to 40 mPa·s, and at least one styrene block copolymer other than a styrene-butadiene-styrene block copolymer, wherein said styrene-butadiene-styrene block copolymer P is at a content from 10 to 40% by weight relative to the total weight of the polymer component. The invention also relates to the use of said composition as an adhesive for bonding two substrates, and to articles comprising at least one interior or exterior surface coated with said composition.