1330 results about "Butadiene Dioxide" patented technology

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 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 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 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 organic high-molecular compound synthesis, in particular to a modified ABS material diffusion plate and a preparation method thereof.The preparation method comprises the steps that dried ABS resin and acrylonitrile-butadiene-styrene copolymer are mixed to prepare a modified ABS base material; mixing organic silicon microspheres and nano barium sulfate to obtain a modified light diffusion agent; judging that the modified light diffusant is unqualified by comparing the refractive index absolute difference between the modified light diffusant and the modified ABS base material, and performing modification compensation; a titanate coupling agent is determined to be adopted for modification according to the content of inorganic particles of the modified light diffusion agent; mixing the modified light diffusant with an antioxidant system, an ultraviolet protective agent and a processing aid to obtain a functional additive; and mixing with a modified ABS (Acrylonitrile Butadiene Styrene) base material, and extruding by using a twin-screw extruder to Through multi-parameter feedback and accurate compensation control, the problems that the compatibility of the modified light diffusion agent and the base material is poor and the stability of the machining process is insufficient are effectively solved.

The invention relates to the technical field of pavement materials, and particularly discloses an all-solid waste asphalt mixture as well as a preparation method and application thereof. The all-solid waste asphalt mixture is prepared from the following raw material components: activated waste rubber powder, waste rubber powder modified emulsified asphalt, a waste asphalt-based pavement material, aggregate, a fiber material and an additive, wherein the aggregate comprises coal gangue powder, waste magnesia carbon brick powder, nut shell powder, coarse aggregate, steel slag powder and fine aggregate; the fiber material comprises activated aramid fiber and waste rubber powder modified glass fiber reinforced plastic fiber; the additive comprises a smoke suppression viscosity reducer and a styrene-butadiene-styrene block copolymer. The all-solid waste asphalt mixture with excellent pavement performance is prepared by utilizing the synergistic effect of all the component raw materials, and the problem that the pavement performance of an asphalt regenerated mixture is poor due to the fact that existing solid waste is poor in compatibility with other components when being applied to the asphalt regenerated mixture is effectively solved.

The invention belongs to the technical field of wear-resistant materials, and particularly relates to a wear-resistant flexible material for an LED lamp strip and a preparation method of the wear-resistant flexible material. The invention discloses a PVC (polyvinyl chloride) material which is prepared from the following raw materials in parts by mass: 80-110 parts of PVC resin, 2-4 parts of a methyl methacrylate-butadiene-styrene copolymer, 0.5-1.5 parts of methyl vinyl silicone rubber, 0.3-0.5 part of a maleic anhydride grafted polyethylene octylene elastomer, 0.5-1 part of modified nano silicon dioxide, 2-3 parts of epoxidized soybean oil, 1-2 parts of dioctyl adipate, 3-5 parts of a heat stabilizer and 0.3-0.5 part of butyl stearate. 0.1-0.3 part of an antioxidant and 1-3 parts of an acrylate processing aid. The PVC resin is used as a base material, the flexible silicone rubber is used as an auxiliary material, material performance optimization is achieved through cooperation of the raw materials such as the plasticizer and the heat stabilizer, and the performance such as flexibility, abrasion resistance and heat stability of the material is guaranteed.

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 invention provides a method for improving interfacial compatibility of PE (polyethylene) and PS (polystyrene), and belongs to the technical field of HI PS production. The method comprises the following steps: preparing compatilizer premixed master batches of a hydrogenated styrene-butadiene block copolymer and a styrene-butadiene-styrene block copolymer, and determining an optimal compatilizer dosage by adopting an interfacial tension prediction model; a multi-stage melt blending process is adopted to realize segmented addition and step-by-step mixing of components, inorganic powder and a processing aid are added to form a composite aid system to regulate crystallization behavior and improve thermal stability, and process parameters such as temperature and rotating speed of a twin-screw extruder are controlled to promote dispersion orientation of a compatilizer on an interface. And optimal cooling parameters are determined through a graded cooling temperature optimization experiment and iterative optimization of a shortest path algorithm to realize matching of polyethylene crystallization and a polystyrene curing process, so that the technical problem of unstable mechanical properties of an alloy material caused by poor interfacial compatibility of polyethylene and polystyrene is solved.

The invention relates to the technical field of MBS resin preparation, in particular to MBS resin with improved low-temperature tensile strength and a preparation method thereof. The MBS resin for improving the low-temperature tensile strength is prepared from the following main raw materials: butadiene, styrene, methyl methacrylate, butyl acrylate, N-phenylmaleimide, BAPT, a silane coupling agent and an auxiliary reinforcing monomer, the composition also comprises the following auxiliary agents: an emulsifier, an initiator, a molecular weight regulator and an antioxidant. Through gradient introduction and step-by-step reaction of a rigid monomer N-PMI, a flexible monomer THFA and a cross-linking agent BAPT, a fine structure of'in-core rigidity increasing, shell layer rigidity and softness and interface strengthening 'is realized in polymer particles. By means of the collaborative structure from inside to outside, optimal distribution of rigidity and toughness of the material on the molecular level is achieved in advance, and the root reason for breaking through the low-temperature performance balance bottleneck macroscopically is achieved.

The invention discloses an environment-friendly water-based composite adhesive for transfer paper and a preparation method of the environment-friendly water-based composite adhesive. The environment-friendly water-based composite adhesive is prepared from the following raw materials in percentage by mass: 28-45% of methyl methacrylate; 30 to 40% of butyl acrylate; 0.3%-0.8% of an initiator; 2-4% of an emulsifier; 1-5% of butadiene; 0.5 to 1.5 percent of a tackifier; 0-0.15% of a reinforcing agent; 0.1 to 0.5 percent of a pH regulator; 0.05-0.25% of a defoaming agent and the balance of water; the preparation process comprises the following steps: S1, prepolymerizing butadiene; s2, preparing an acrylate emulsion; and S3, mixing and blending. The preparation method has the advantages that the butadiene, the tackifier and the reinforcing agent are used in the formula to regulate and control the adhesive force and the toughness of the adhesive film, the types of the acrylate monomers are reduced, and the defects that the regulation and control capability is limited, the variables are multiple and the parameters are difficult to consider simultaneously when the types and the contents of the acrylate soft and hard monomers are accurately controlled to regulate and control the parameters are overcome.

The invention provides a mild and moisturizing base makeup product and a preparation method thereof. The base makeup product is prepared from the following raw materials in parts by weight: 0.5 to 2.0 parts of camellia japonica extract, 0.5 to 2.0 parts of black spore block extract, 0.2 to 1.0 part of crithmum maritimum extract, 3.0 to 8.0 parts of four-dimensional hyaluronic acid slurry, 1.0 to 4.0 parts of film-forming agent, 5.0 to 20.0 parts of toner, 2.0 to 6.0 parts of styrene / butadiene copolymer, 8.0 to 15.0 parts of bionic lipid, 40 to 90 parts of purified water, 0.2 to 0.5 part of pH (Potential of Hydrogen) regulator, 1.5 to 3.0 parts of emulsifier and 0.8 to 1.5 parts of preservative. According to the base makeup product disclosed by the invention, a dynamic moisturizing system is constructed through multiple mechanisms. Wherein the four-dimensional hyaluronic acid slurry is used as a core, and all-around and three-dimensional moisturizing from epidermis water locking, stratum corneum permeation water replenishing to surface water storage is realized through the cooperation of hyaluronic acids with different molecular weights. The bionic lipid simulates a human body sebum film to form a skin-friendly moisturizing barrier, so that water loss is effectively prevented. Meanwhile, the crithmum maritimum extract and the lactobacillus fermentation product can actively repair the skin barrier, and the moisturizing capacity of the skin is further enhanced.

The invention provides a high-performance polypropylene plastic bucket material and a preparation method thereof, and belongs to the field of high-performance polypropylene plastic. The high-performance polypropylene plastic bucket material is prepared from the following raw materials in parts by weight: 100 parts of polypropylene resin, 8 to 15 parts of hydrogenated styrene-butadiene-styrene block copolymer, 3 to 8 parts of modified nano silicon dioxide, 2 to 5 parts of epoxy functionalized polypropylene, 3 to 10 parts of ethylene-vinyl acetate copolymer, 0.2 to 0.5 part of beta crystal form nucleating agent and 1.5 to 4 parts of hyperbranched dynamic cross-linking agent, the composition comprises the following components in parts by weight: 1-4 parts of maleic anhydride grafted polypropylene, 0.3-0.6 part of an antioxidant, 0.2-0.4 part of a hindered amine light stabilizer and 0.1-0.3 part of an ultraviolet light absorber. By constructing a multi-component and multi-network synergistically enhanced polypropylene composite material system, the problem that rigidity, toughness, long-term stability and weather resistance are difficult to consider at the same time is essentially and synergistically solved.

The invention discloses artificial board emulsifying wax, which is prepared from the following raw materials in percentage by mass: 25 to 40 percent of paraffin, 3 to 5 percent of compound emulsifier, 2 to 4 percent of cationic starch, 3 to 7 percent of liquid polybutadiene and 44 to 67 percent of water, the compound emulsifier is a nonionic emulsifier, and the hydrophilic-lipophilic balance value is 9-10. The artificial board emulsifying wax is good in waterproofness and high in strength when applied to artificial boards.

The invention relates to the technical field of high polymer materials and synthetic fibers, and particularly discloses a high-wear-resistance polyamide fiber and a preparation method thereof. The fiber is prepared by taking polycaprolactam as a matrix, compounding spherical nano silicon carbide and molybdenum disulfide nanosheets as wear-resistant components, taking a maleic anhydride grafted hydrogenated styrene-ethylene-butadiene-styrene block copolymer as an interface compatilizer, and taking hyperbranched polyamide-amine as a dispersing agent. The polyester fiber is prepared through the processes of master batch preparation, melt spinning, multi-stage hot drafting and relaxation heat setting. Through the synergistic effect of all the components and the optimization process, the wear resistance of the fiber is remarkably improved, and meanwhile, the common problems of toughness reduction and fatigue resistance deterioration in high-wear-resistance modification are effectively solved. The polyamide fiber is tough and durable, is specially used for manufacturing high-safety-requirement products such as mountaineering ropes, rescue ropes and industrial lifting belts, and can reduce the fracture risk in repeated use and guarantee the use safety.

The invention discloses a composite toughened high-modulus asphalt modifier as well as a preparation method and application thereof. The composite toughened high-modulus asphalt modifier is prepared from the following components in parts by mass: 35 to 45 parts of PCT-G resin, 15 to 25 parts of hydrogenated styrene-butadiene block copolymer, 0.5 to 1.5 parts of graphene oxide and 4 to 8 parts of polyolefin grafted glycidyl methacrylate. The invention relates to the technical field of composite materials. According to the composite toughening high-modulus asphalt modifier and the preparation method and application thereof, the high bearing modulus of asphalt is guaranteed through PCT-G and GO, the low-temperature crack resistance is improved through SEBS and the core-shell elastomer, the problems that traditional modified asphalt is high in modulus and prone to embrittlement, high in toughness and prone to deformation are solved, and the composite toughening high-modulus asphalt modifier is suitable for heavy traffic load scenes.

The invention discloses a high-impact-resistance plate and a preparation method thereof, and relates to the technical field of preparation of stone-plastic plates. The raw materials comprise the following components in parts by mass: 100-120 parts of a vinyl chloride-butadiene-styrene-acrylonitrile copolymer, 50-150 parts of calcium powder, 15-35 parts of a plasticizer, 0.2-0.8 part of an antioxidant, 1.5-5 parts of a stabilizer and 5-15 parts of a processing aid. The preparation method comprises the steps of mixing, banburying, open milling, calendering and cooling traction discharging. According to the invention, the influence of the raw material formula ratio of the stone-plastic plate on the impact resistance of the plate is explored, and a proper processing mode is matched, so that the stone-plastic plate prepared by taking the ABS copolymer and the calcium powder as main raw materials has better impact resistance.

It has been unexpectedly found that certain neodymium catalyst systems can be used to copolymerize isoprene and 1,3-butadiene to produce random isoprene-butadiene copolymer rubbers which are not tapered. These random isoprene-butadiene copolymer rubbers have properties which are beneficial for use in rubber formulations for manufacturing a wide variety of rubber products, such as tires, hoses, conveyor belts, power transmission belts, and shoe soles. These random isoprene-butadiene rubbers are synthesized by copolymerizing (a) isoprene monomer or a substituted isoprene monomer and (b) 1,3-butadiene monomer in the presence of a neodymium catalyst system, wherein the neodymium catalyst system is prepared by (1) reacting a neodymium carboxylate with an organoaluminum compound in the presence of a conjugated diolefin monomer to produce neodymium-aluminum catalyst component, and (2) subsequently reacting the neodymium-aluminum catalyst component with an alkyl aluminum chloride to produce the neodymium catalyst system.

The utility model provides a device for observing the state of a butadiene-terminated polymer in a C203 tower of a butadiene device. The device comprises a high-definition magnifier, a magnifier spotlight, a high-definition camera, a leakproof outer tower wall and a differential pressure gauge. The device can intuitively and effectively observe the generation condition and state of the butadiene white end-group polymer at the position which is easy to initiate polymerization above the 111-layer tray in the high-concentration butadiene C203 tower, and the generation of the butadiene end-group polymer can be found as soon as possible, so that device operators are helped to take effective anti-polymerization measures as soon as possible, and the production efficiency of the high-concentration butadiene C203 tower is improved. Equipment damage caused by gradual accumulation and implosion of the generated butadiene-terminated polymer and fire and explosion accidents caused by overflow of a butadiene medium are avoided.

To provide a positive electrode with excellent resistance characteristics and superior mechanical strength. [Solution] The positive electrode mixture layer comprises a binder containing a positive electrode active material and hydrogenated carboxylated nitrile butadiene rubber, comprising 20% ​​to 40% by weight of a first structural unit derived from acrylonitrile represented by a specific formula, based on 100% by weight of the rubber; 30% to 78% by weight of a second structural unit containing a hydrogenated butadiene-derived structural unit represented by a specific formula and a butadiene-derived structural unit represented by a specific formula; 2% to 10% by weight of a third structural unit represented by a specific formula; and 0% to 20% by weight of a fourth structural unit represented by a specific formula, wherein the hydrogenated butadiene-derived structural unit represented by the specific formula is present in an amount of 90% or more and less than 100% by weight relative to 100% by weight of the second structural unit, and the butadiene-derived structural unit represented by the specific formula is present in an amount of more than 0% and 10% or less relative to 100% by weight of the second structural unit.

Disclosed herein is a method for converting ethanol to 1,3-butadiene, wherein the method utilizes H2 produced during a first step of the method for subsequent conversions involved in the method. In particular aspects, H2 produced from converting ethanol to acetaldehyde is used to promote the conversion of the acetaldehyde to 1,3-butadiene. The H2 promotes enhanced catalyst stability, as well as enhanced selectivity and yields of the 1,3-butadiene product. In particular aspects, the method comprises two steps to produce the 1,3-butadiene from the ethanol and H2 produced from a first step facilitates enhanced selectivities and yields for the second step.

The present invention discloses a method and system for producing hexafluorobutadiene, which includes the following steps: In step (1), an organic solution of bromotrifluoroethylene and zinc powder are respectively introduced into a first reactor containing an initiator, zinc powder, and an organic solvent, followed by a second reactor, and reacted to obtain a trifluorovinylzinc bromide solution. The reaction solution is then introduced into a precipitator to separate excess zinc powder, resulting in a zinc-free trifluorovinylzinc bromide solution. The excess zinc powder is then filtered and reused. In step (2), the trifluorovinylzinc bromide solution obtained above and a pre-prepared composite catalyst solution are introduced into a third reactor and subjected to a coupling reaction to obtain crude hexafluorobutadiene. In step (3), the crude hexafluorobutadiene obtained above is purified to obtain a product with a purity of ≥ 99.9%.

The invention provides a cable material as well as a preparation method and application thereof, and the cable material comprises the following components in parts by weight: 25-45 parts of polypropylene resin, 25-45 parts of elastomer, 80-100 parts of flame retardant, 1-3 parts of antioxidant and 1-2 parts of lubricant. The elastomer comprises any one or a combination of at least two of a styrene-butadiene-styrene block copolymer, an ethylene propylene diene monomer or an ethylene-vinyl acetate copolymer. The polypropylene resin and the elastomer are blended, so that the mechanical strength, the environmental adaptability and the aging resistance of the cable material are comprehensively improved while excellent electrical insulation performance of the cable material is maintained; the halogen-free flame retardant is added, so that the release of smoke and toxic gas is reduced, and an efficient and environment-friendly flame-retardant effect is realized.

The invention discloses a high-temperature-resistant low-friction-coefficient low-abrasion sealing material and a preparation method thereof, and belongs to the technical field of sealing materials. The sealing material is prepared from the following raw materials in parts by mass: 60 to 80 parts of hydrogenated butadiene-acrylonitrile rubber, 20 to 40 parts of hydrogenated carboxyl butadiene-acrylonitrile rubber, 40 to 50 parts of carbon black N234, 4 to 6 parts of modified carbon fiber, 2 to 4 parts of modified hexagonal boron nitride, 3 to 5 parts of liquid polybutadiene, 3 to 4 parts of composite vulcanizing agent, 2 to 3 parts of zinc oxide, 1 to 2 parts of rubber anti-aging agent 445, 1 to 2 parts of anti-aging agent MB, 0.2 to 0.5 part of accelerant BZ and 0.5 to 2 parts of stearic acid. The modified carbon fiber is obtained by growing molybdenum disulfide on the surface of carbon fiber in situ and performing amination modification, the modified hexagonal boron nitride is obtained by performing grafting reaction on hydroxylated hexagonal boron nitride and an epoxy silane coupling agent, and the sealing material provided by the invention has high wear resistance and high temperature resistance.

The present invention relates to a polycarbonate composition comprising the following components, relative to the total weight of the composition A) 63-81 wt. % of an aromatic polycarbonate,B) 13-20 wt. % of a phosphorus flame retardant,C) 4-12 wt. % of impact modifiers containing 1-7 wt. % of a first impact modifier and 1-7 wt. % a second impact modifier, wherein the first impact modifier is acrylonitrile-butadiene-styrene, and the second impact modifier is selected from methyl methacrylate-butadiene-styrene and silicone-acrylic rubber based impact modifiers,D) 1-6 wt. % of a mineral filler, andE) 0.05-0.09 wt. % of polytetrafluoroethylene.The present invention also relates to a shaped article made from the composition. The polycarbonate composition according to the present invention has a good combination of flame retardancy and impact strength.

This invention provides a phosphorus-containing flame retardant, its preparation method and application, and a resin composition and its application, specifically relating to the field of polymer materials technology. The phosphorus-containing flame retardant provided by this invention achieves an integrated design of the flame-retardant unit and the elastic matrix at the molecular scale by directionally and controllably grafting phosphorus-containing groups M onto the active sites of the polybutadiene soft segments in a styrene-butadiene-styrene block copolymer via covalent bonds. This structure retains the inherent high flexibility, impact resistance, and processing rheological properties of the styrene-butadiene-styrene block copolymer while imparting intrinsic, durable, and uniformly distributed flame-retardant capabilities to the material. Simultaneously, because the phosphorus element is anchored to the polymer backbone / side chain, no small molecule polar impurities are introduced, significantly suppressing dielectric polarization loss and hygroscopicity increases. This provides a structural basis and performance guarantee for the subsequent construction of a high-end thermosetting resin system for copper-clad laminates with low Dk / Df, high Tg, and low CTE.

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.