44results about How to "Improve aging resistance" patented technology

This invention provides a modified glass fiber, glass fiber reinforced butyl hot melt adhesive, and their preparation method. The modification method of the glass fiber includes: mixing a silane coupling agent with ethanol, stirring and hydrolyzing to obtain a silane coupling agent solution; placing the glass fiber in the silane coupling agent solution, stirring and reacting at 40-80℃ for 4-6 hours, then filtering, and curing the obtained solid product at 100-150℃ for 0.5-2 hours to obtain pre-modified glass fiber; immersing the pre-modified glass fiber in a toluene solution containing furanylsilane coupling agent, reacting under inert gas protection at 70-90℃ for 1-3 hours, and performing graft modification treatment to obtain the modified glass fiber. The use of silane coupling agent and furanylsilane coupling agent to introduce dynamic covalent bonds, synergistically modifying the glass fiber with a bilayer coupling agent, and introducing the modified glass fiber into the butyl rubber system, can effectively improve the mechanical properties and aging resistance of the butyl rubber while maintaining its original water tightness and air tightness.

The application provides a two-component polyurethane pouring sealant and a preparation method and application thereof. The two-component pouring sealant comprises an A component and a B component. The A component comprises propylene oxide modified lignin polyol and erythritol modified polyether polyol. The B component comprises cashew phenol based polyurethane prepolymer. The propylene oxide modified lignin polyol, the erythritol modified polyether polyol and the cashew phenol based polyurethane prepolymer have a synergistic effect, which can significantly improve the shear strength of the pouring sealant at high temperature, and the pouring sealant has good low-temperature bonding performance, aging resistance and impact resistance. Specifically, the shear strength at 60 DEG C is greater than 13 MPa, the shear strength remains above 12.5 MPa after aging in a double 85 environment, the attenuation rate is less than 7% compared with the shear strength at room temperature, the shear strength can remain above 13 MPa after high-low temperature impact test, the attenuation rate is less than 3%, and the pouring sealant meets the pouring requirements of power batteries in the field of new energy batteries.

The application discloses a drainage bag with an antibacterial functional layer and a preparation process thereof, and relates to the technical field of medical materials, and comprises the following steps: adding modified montmorillonite into N, N'-dimethylacetamide, uniformly mixing through ultrasonic, adding a polyurethane film, ultrasonic immersion for 60-120 min, drying, and obtaining a drainage bag substrate; adding polylactic acid into N, N-dimethylformamide, uniformly stirring and mixing, adding modified nano zinc oxide, uniformly mixing through ultrasonic, and then performing electrospinning to obtain an antibacterial coating fiber film; placing the antibacterial coating fiber film on the inner side surface of the drainage bag substrate, high-frequency heat sealing, assembling, and obtaining the drainage bag.

The raw material compositions for preparing acrylic optical coatings and for preparing acrylic optical lenses both contain sulfur-containing aromatic acrylate compounds as shown in Formula A. The optical materials prepared from these raw material compositions, with precisely controlled refractive indices of 1.53–1.60, significantly improve the material's resistance to yellowing, optical durability, and impact resistance, meeting the application requirements of high-end optical materials. Wherein, R1 = CH2 = CH-COO, R2 = CH3, n = 2 or 3, and m = 0, 1, or 2.

This invention discloses a heat- and impact-resistant protective conduit for MPP cables and its preparation method, relating to the field of polymer materials technology. The components, by weight, include: 20-22 parts of a toughening dispersion made from anhydrous ethanol and terminally epoxy-terminated hyperbranched polysiloxane; 33-35 parts of a boron-nitrogen co-doped carbon dot made from citric acid, boric acid, and urea, first compounded with phytic acid and piperazine, then compounded with modified zirconium phosphate prepared by hexadecyltrimethylammonium bromide intercalation, and then modified with silane coupling agent KH-560 to form a flame retardant synergist; 12-14 parts of polyolefin elastomer; 2-2.5 parts of magnesium aluminum hydrotalcite; 0.2-0.24 parts of antioxidant; 0.2-0.3 parts of calcium stearate; 0.2-0.3 parts of polyethylene wax; and 100-120 parts of polypropylene. The introduction of the flame retardant synergist and other raw materials in this invention effectively improves flame retardancy, aging resistance, impact resistance, low-temperature resistance, and heat resistance.

This invention relates to an EPDM-based crosslinked rubber material and its preparation method. The rubber material is obtained by vulcanizing raw rubber composed of EPDM rubber, maleic anhydride-grafted polyethylene, a peroxide vulcanizing agent, ethylene glycol dimethacrylate, p-benzoquinone dioxime, lead metal oxide, paraffin oil, a silane coupling agent, and an antioxidant. The EPDM-based crosslinked rubber material obtained by this invention has a double crosslinked structure. The formulation system endows EPDM rubber with excellent physical and mechanical properties, electrical insulation properties, and aging resistance, while also possessing good injection molding performance. This material solves the problems of high prices and long procurement cycles associated with imported finished products, providing an efficient and economical solution for the production of cable accessories.

The present application relates to the technical field of high polymer composite material, and especially to a co-extrusion fabric, a preparation method and application thereof, and is especially suitable for the field of steel-plastic composite floor which is strict in size stability and mechanical property requirement, such as building decoration, industrial floor, outdoor paving, etc., the co-extrusion fabric comprises the following raw material components in parts by weight: polyethylene: 40-70 parts; elastomer: 20-50 parts; compatibilizer: 3-10 parts; inorganic mineral: 5-10 parts; antioxidant: 0.1-1 part; lubricant: 0.5-1 part; a low-shrinkage, anti-warping polyethylene composite zinc-aluminum-magnesium alloy steel-plastic floor co-extrusion fabric is provided, by optimizing the raw material ratio, selecting special compatibilizer and inorganic mineral filler, the efficient compatibility of polyethylene, elastomer and inorganic filler is realized, the polyethylene crystalline morphology is controlled, the material shrinkage is greatly reduced, the hidden danger of warping deformation is eliminated, and the mechanical strength, toughness and weather resistance of the material are improved.

The utility model relates to cable technical field, concretely relates to a waterproof rubber cable, including setting in the cable core and the first waterproof grease, encapsulation layer, inner sheath, armoring layer and outer sheath that cover in the conductor outside in cable center, the cable core is twisted and is made of a plurality of conductors, and the interstice of a plurality of the conductor insides is filled with second waterproof grease, the first waterproof grease coats in the cable core outside, the encapsulation layer adopts the mode of around package or longitudinal package and is wound in the first waterproof grease outside, the inner sheath is extruded and is packed outside the encapsulation layer, the armoring layer adopts the mode of around package or longitudinal package and is wound in the inner sheath outside, the outer sheath is extruded and is packed outside the inner sheath. The waterproof rubber cable through " layering waterproof and structure reinforcement " combination, has realized high waterproof, high mechanical strength, high environmental adaptability comprehensive technical effect, has given consideration to electrical performance stability and use reliability, is suitable for the industry and outdoor scene of strict waterproof, protection requirement.

This invention belongs to the field of photovoltaic module technology, specifically relating to a method for preparing a lightweight photovoltaic module and its application. The preparation method includes the following steps: S1, sequentially laying a front encapsulation plate, a first encapsulating film, a solar cell, a second encapsulating film, and a rear encapsulation plate to obtain a laminate; S2, performing a lamination process on the laminate to obtain the lightweight photovoltaic module; the lamination process includes sequentially placing the laminate in the first and second chambers of a laminator for lamination; the lamination temperature T1 of the first chamber is lower than the lamination temperature T2 of the second chamber, and satisfies: 30℃≤T2-T1≤50℃. The lightweight photovoltaic module provided by this invention has high initial power, good weather resistance, aging resistance, and bending resistance, and has excellent application prospects in photovoltaic power generation equipment.

This utility model belongs to the field of PVC power pipe technology and discloses an aging-resistant PVC power pipe, including a multi-layer composite pipe body. The multi-layer composite pipe body comprises, from the inside out, a PVC base layer, a weather-resistant modified layer, and an outer protective layer. A connecting sleeve is installed at one end of the multi-layer composite pipe body. An installation ring is installed on the periphery of the end of the multi-layer composite pipe body near the connecting sleeve. A pair of installation blocks are installed around the periphery of the installation ring. One side of each installation block has a through groove. An installation ring is installed on the periphery of the end of the multi-layer composite pipe body away from the connecting sleeve. A pair of installation blocks are installed on both sides of the installation ring. One side of each installation block has a through groove. The device also includes an arc-shaped baffle and a locking mechanism. This device has a simple and reasonable structure, a novel design, and is easy to operate. It has high practicality and is easy to widely promote and use.

This invention relates to the field of polymer materials technology, and discloses a high-elasticity rubber-plastic insulated cable composite material and its preparation method. The high-elasticity rubber-plastic insulation material comprises, by weight, 40-50 parts of EPDM rubber, 20-25 parts of polyolefin elastomer, 30-35 parts of modified calcined kaolin, 3-5 parts of composite antioxidant, 2-3 parts of silane coupling agent, and 1.5-2 parts of vulcanizing agent. During preparation, EPDM rubber and polyolefin elastomer are kneaded for 5-8 minutes, then modified calcined kaolin and silane coupling agent are added and kneaded for another 8-12 minutes, followed by the addition of composite antioxidant and vulcanizing agent and kneading for 3-5 minutes. Finally, the mixture is vulcanized in stages. The first stage vulcanization temperature is 155-160℃, and the second stage vulcanization temperature is 165-170℃. The insulating material prepared by this invention has excellent elasticity, outstanding resistance to flexural fatigue, stable insulation performance, high volume resistivity, excellent aging resistance, and tight interfacial bonding. It is suitable for use in high-voltage cable insulation layers, effectively extending the service life and stability of the cable.

This invention relates to a multifunctional bioactive dental bulk filling composite resin and its preparation method. The composite resin comprises an organic resin matrix and an inorganic filler; the organic resin matrix comprises polymerizable resin monomers and a photoinitiator system, the polymerizable resin monomers comprising dimethacrylate monomers and E-POSS; the inorganic filler comprises nMgO and sSiO2 with a silanized surface. The preparation method includes the following steps: preparing nMgO powder using a sol-gel method combined with a gradient calcination process; preparing submicron-sized sSiO2 using the Stöber method and subjecting it to surface silanization treatment to obtain silanized sSiO2; mixing the polymerizable resin monomers, E-POSS, and the photoinitiator system, stirring in the dark until a homogeneous resin matrix is ​​formed; adding the obtained nMgO and silanized sSiO2 to the resin matrix in a specific ratio and mixing and dispersing evenly to obtain an uncured paste-like composite resin.

This invention relates to the field of coating technology, and proposes a high weather-resistant alkyd protective coating and its preparation method. The alkyd protective coating comprises the following components in parts by weight: 45-55 parts alkyd resin, 20-42 parts methylphenyl silicone resin, 10-25 parts carbon nanotubes, 1-2 parts dispersant, 0.5-1.5 parts anti-settling agent, 1-2 parts drying agent, and 15-20 parts solvent. This technical solution solves the problems of poor weather resistance and flexibility caused by poor tensile properties, poor low-temperature flexibility, and poor aging resistance in related technologies of alkyd protective coatings.

This invention discloses a high-strength, high-elongation, low-hardness natural rubber and its preparation method. By weight, the high-strength, high-elongation, low-hardness natural rubber comprises the following components: 100 parts natural rubber, 1.5-3 parts crosslinking agent, 0.8-2 parts accelerator, 10-20 parts reinforcing agent, 5-15 parts softener, 1-3 parts antioxidant, and 3-8 parts activator. The high-strength, high-elongation, low-hardness natural rubber has a tensile strength ≥20 MPa, an elongation ≥700%, and a Shore A hardness of 35-45. Under normal operating conditions of -20℃ to 80℃, the fluctuation range of the tensile strength and elongation is controlled within ±5%, and the Shore A hardness fluctuation is ≤±2. This invention solves the technical problem of achieving a balance between high strength, high elongation, and low hardness in existing natural rubber formulations. The formulation components of this invention are widely available, the preparation process is simple, and the production cost is controllable. It can be widely applied in multiple fields and has extremely high practical value and promising prospects for promotion.

The present application relates to a kind of polybutylene terephthalate resin composition and its preparation method and application, the polybutylene terephthalate resin composition includes biobased polybutylene terephthalate resin, titanium element, phosphorus element and cobalt element;The weight content of titanium element in the polybutylene terephthalate resin composition is 20-150ppm, the weight content of phosphorus element is 2-50ppm, the weight content of cobalt element is 4-100ppm;The mass ratio of titanium element, phosphorus element and cobalt element in the polybutylene terephthalate resin composition is (2-20):(1-2):(1-10).The polybutylene terephthalate resin composition provided by the present application, by controlling the weight content and mass ratio of titanium element, phosphorus element and cobalt element within suitable range, can make polybutylene terephthalate resin composition have high whiteness, excellent mechanical properties and aging resistance.

The utility model discloses a low -cost piece formula contact piece jack structure relates to connector technical field, including conductive main part and steel case, and the conductive main part includes the elastic region and the end region of increasing thickness in proper order, and is provided with the transition area of thickness conversion between the elastic region and the end region, is equipped with the elastic contact cantilever on the elastic region, and the steel case sets up on the transition area and cooperates with the elastic contact cantilever on the elastic region. The material of elastic region is thin, and a plurality of contacts are arranged on the elastic contact cantilever, and the conductive function can be realized after contacting with the pin; the transition area is the thick, thin material conversion area; the end region is the connecting area of pencil and similar pencil function components, and generally uses the welding, crimping etc. Mode to realize the connecting function. The steel case is wrapped in the outside of conductive main part, can promote the contact stability and the ageing resistance of elastic region contact, realizes the anti -back function simultaneously, can guarantee the contact stability of contact region, and can solve the problem of few and high cost of existing contact.

A method for preparing colored radiant cooling wood is disclosed. The purpose of this invention is to solve the application problems of existing microstructured colored radiant coolers, such as difficulty in preparation, high production costs, and lack of environmental friendliness. The preparation method includes: 1. Immersing dried wood in a lignin removal solution under vacuum conditions, followed by a water bath reaction at 75–80°C; 2. Dispersing fluorescent dye in an organic solvent, mixing it with methyl methacrylate monomer, adding the initiator azobisisobutyronitrile (AIBN), and prepolymerizing at 70–90°C; 3. Permeating the delignified wood into a prepolymerized dye / MMA mixed solution under vacuum; 4. Heating and polymerizing at 70–90°C. The delignified wood used in this invention is green and environmentally friendly. While maintaining excellent mechanical strength, the shape and size of the colored radiant cooler can be rationally set according to the needs of different scenarios, taking into account both flexibility and toughness, and is cost-effective.

The application discloses an underground intelligent early warning cable and a preparation method thereof, and belongs to the technical field of cables. The cable comprises, from inside to outside, a core assembly, a wrapping assembly and an outer sheath assembly. The core assembly comprises at least one conductive wire core and a communication optical cable unit. The conductive wire core is in a twisted distribution, and the communication optical cable unit is arranged outside the conductive wire core. Each conductive wire core comprises a conductor, a temperature sensing optical fiber conductor unit and an insulation layer. A copper tape shielding layer is arranged outside the conductive wire core. Mica tape is arranged in the gap of the core assembly. The outer sheath assembly is low-smoke halogen-free polyolefin. Through the application, the communication optical cable unit and the temperature sensing optical fiber conductor unit are arranged, and the communication optical cable unit is arranged in the gap surrounded by the conductive wire core, so that synchronous transmission and backhaul of monitoring information are realized. Operation data can be quickly transmitted through the communication optical cable unit, and the problems of dispersed monitoring signal link, unstable transmission and feedback lag of traditional cables are avoided.

The invention discloses a bio-based core-shell structure flame retardant and an application thereof in a bio-based plate. According to the invention, a phosphorus-carbon synergistic flame-retardant core-shell structure flame retardant is developed by taking a phosphorus-containing halogen-free flame retardant as a core and carrying out free radical copolymerization reaction on a furfuryl alcohol (FA) derivative containing phosphorus in different oxidation states and bismaleimide (BMI) with a charring function to form a cross-linked flame-retardant macromolecular shell layer. The core-shell flame retardant is proportionally mixed with crushed materials of a biological base material and an adhesive, and the mixture is subjected to hot press molding to obtain the flame-retardant biological base material. The flame retardant provided by the invention not only can endow a biological base material with good flame retardance and mechanical properties, but also can solve the problem of long-term durability of the biological base material.

The application relates to the technical field of power cables, and discloses an anti-aging and flame-retardant power cable which comprises, from inside to outside, a conductor, an insulation layer, an armored layer and a sheath layer, wherein the raw material of the sheath layer comprises the following components in parts by weight: 100 parts of linear low-density polyethylene, 2-3 parts of a photoinitiator, 0.2-0.5 parts of an antioxidant, 0.03-0.08 parts of a light stabilizer, 13-15 parts of a flame retardant and 5-6 parts of a filler; the flame retardant comprises the following components in parts by weight: 100 parts of talcum powder loaded with zinc stannate and 30-40 parts of magnesium hydroxide. Through the technical scheme, the problem of insufficient flame retardation and aging resistance of the sheath layer in the related art is solved.

This invention discloses a method for preparing odor-neutralizing spray granules for sports fields, relating to the technical field of odor-neutralizing spray granules. The steps are as follows: S1 Pre-treatment of waste rubber powder and thermoplastic elastomer, drying of inorganic fillers; S2 Mixing rubber powder and elastomer in an internal mixer, adding plasticizers and activators to prepare a base rubber compound; S3 Modification by adding odor-neutralizing and formaldehyde-removing agents under negative pressure; S4 Plasticizing and extruding the rubber compound into strips using a twin-screw extruder; S5 Water cooling followed by pelletizing to obtain a coarse product; S6 Screening to remove unqualified particles, followed by hot air drying and activated carbon adsorption for secondary odor neutralization to obtain the finished product. The spray granules prepared by this invention have a long-lasting odor-neutralizing effect, good environmental performance, and excellent elasticity, wear resistance, and adhesion strength; the process is highly controllable, the product has uniform particle size, good aging resistance, and is suitable for the spraying needs of various sports fields, while realizing the resource utilization of waste rubber, possessing both practical and environmental value.

This invention relates to the field of wire and cable technology, and proposes an overhead insulated conductor and its preparation method. The overhead insulated conductor includes a conductor and an insulation layer covering the outside of the conductor. The conductor includes a reinforcing core and an aluminum wire layer stranded around the reinforcing core. The raw materials of the insulation layer include the following components by weight: 80-100 parts styrene-butadiene rubber, 30-40 parts nitrile rubber, 20-30 parts polycarbonate, 20-30 parts filler, 3-5 parts aromatic oil, 3-5 parts activator, 2-3 parts antioxidant, 2-4 parts accelerator, and 1-3 parts vulcanizing agent. This technical solution solves the problem of insufficient aging resistance of the insulation layer in related technologies.

This invention provides a high-adhesion UV-resistant insulating resin containing heterocyclic modified silicone-acrylic resin and its preparation method, belonging to the field of polymer materials technology. The core technical solution of this invention involves designing and synthesizing a heterocyclic modified silicone-acrylic resin as the main resin, which is prepared from organosilicon oligomers, nitrogen-containing heterocyclic monomers, and glycidyl methacrylate as raw materials. The adhesion promoter adopts a core-shell structure of silane coupling agent and phosphate ester prepolymer grafted with acrylate. Through the synergistic effect of heterocyclic, epoxy, and siloxane groups, chemical bonding and interfacial interpenetration of the substrate are achieved, forming a high-crosslink density three-dimensional network. Performance tests show that the resin of this invention has advantages of high adhesion, high insulation, fast curing, and resistance to environmental aging. The process is simple, solvent-free, and environmentally friendly, making it suitable for UV-resistant protection of PCBs and components in consumer electronics and automotive electronics, and possessing good prospects for industrial application.

This invention relates to a seamless can having an inner surface coating at least on its inner surface side, and a coated metal sheet capable of being formed into such a seamless can. The seamless can is characterized in that the inner surface coating contains a polyester resin and a first-order phenolic resin and / or an amino resin as a curing agent, and the gel fraction (A) of the inner surface coating, as shown in the following formula, is 55% or more and less than 90%. This provides a seamless can with excellent resistance to boiling whitening, resistance to embrittlement over time, no coating peeling during heat treatment after forming, and excellent coating coverage, particularly for deep-drawn and thinned cans. Gel fraction (A) = (W2a / W1a) × 100 (%) where W1a represents the mass of the inner surface coating after separation from the coated metal substrate cut from the seamless can, and W2a represents the mass of the separated inner surface coating after immersion in MEK at room temperature for 60 minutes, followed by removal and drying.

This invention provides a reactive deodorizing agent matrix, its preparation method, and its application, specifically relating to the field of deodorizing agent technology. The reactive deodorizing agent matrix provided by this invention, by mass percentage, comprises the following raw materials: 37-65% organic wax, 12-20% emulsifier, 1-5% butene copolymer, 1-3% antioxidant, 1-5% oxidant, and 20-30% zinc-containing compound. This invention utilizes the oxidant to induce the zinc-containing compound to react with the wax, emulsifier, butene copolymer, and antioxidant under specific conditions, forming a chelate centered on zinc ions. This chelate contains various functional groups that can interact with odor molecules to form chemical bonds, resulting in an irreversible chemical reaction under quasi-chelation, rapidly and permanently removing odor molecules. The antioxidant stabilizes the chemical bonds between the zinc ion chelate and the odor molecules, improving the long-term stability of the chemical bonds and maintaining the long-term stability of the deodorizing effect.

This utility model discloses a high-strength, wear-resistant, and toughened ceramic mesh. It is rectangular in shape and fixed at intervals between two guide rails on the upper part of a hopper, forming several feed inlets. The ceramic mesh includes a steel frame, within which a rubber vulcanized layer is disposed. Several parallel ceramic mesh units are fixedly arranged within the rubber vulcanized layer along the length of the steel frame. T-shaped reinforcing frames are fixedly arranged at intervals on the bottom surface of the steel frame. Connecting parts are provided on the bottom surface of each ceramic mesh unit, and the ceramic mesh units are fixedly connected to the rubber vulcanized layer through these connecting parts. The top wear-resistant surface of each ceramic mesh unit is curved. This high-strength, wear-resistant, and toughened ceramic mesh not only has low material cost and is easy to manufacture, but also exhibits wear and corrosion resistance. Furthermore, it forms a robust and highly buffering anti-wear feed inlet, effectively reducing the impact and wear of materials on hoppers and other equipment, extending the service life of the hopper, and improving production efficiency and quality.

The utility model provides a kind of urea tank bolt re-tightening structure. Including urea tank body, the upper portion of the urea tank body is provided with vent valve, the upper portion of the urea tank body is provided with sensor bayonet, the side of the urea tank body is provided with mounting bolt. In the utility model, the stable connection of first support, second support is achieved by mounting bolt, and the cooperation of strap fixing bolt, so that the structure stability of urea tank body is greatly improved after installation, the problem of component loosening caused by tank body shaking during vehicle operation can be effectively avoided;Screw is used to realize the thread connection of compression ring, fixing washer and sealing plate at filling port, to form reliable re-tightening sealing structure, which can be well adapted with urea filling gun to ensure smooth filling, and can also prevent urea leakage, and the structure is convenient to disassemble and maintain in later period;The thread connection of limiting sleeve and feed inlet further strengthens the sealing property of tank body assembly connection.

This application relates to an aging-resistant cable, comprising a conductor and an insulation layer. The insulation layer comprises the following components: polyvinyl chloride (PVC), cerium dioxide, lauric acid, 4-amino-2,2,6,6-tetramethylpiperidine, benzoylacetone, oxaloyl chloride, triethylamine, anhydrous ethanol, an antioxidant, and an ultraviolet absorber. It also relates to a processing method for the aging-resistant cable. This application has the following advantages and effects: The reaction of cerium dioxide with lauric acid allows metal ions and carboxyl groups to form coordinate bonds, achieving chemical anchoring and generating hydrophobic rare earth carboxylates, improving compatibility with PVC, inhibiting nanoparticle aggregation, promoting uniform dispersion, and providing thermal and light stabilization. Furthermore, the reaction of 4-amino-2,2,6,6-tetramethylpiperidine, benzoylacetone, and oxaloyl chloride yields a free radical scavenging ability with metal chelating capacity and hindered amines, enhancing the thermal and photo-oxidative aging resistance of the PVC cable material.

This invention belongs to the field of asphalt modification technology and discloses a high-performance rubber composite modified asphalt and its preparation method. The high-performance rubber composite modified asphalt is prepared by mixing asphalt and a high-performance rubber composite granular modifier. The high-performance rubber composite granular modifier is obtained by extruding and granulating a novel thermoplastic elastomer, desulfurized rubber powder, and a rubber deodorizer using a multi-stage screw extruder. The novel thermoplastic elastomer is obtained by chemical grafting of a moderately pyrolyzed rubber polymer, a thermoplastic elastomer, and a second free radical scavenger. The desulfurized rubber powder is obtained by high-temperature oxygen-free degradation of a second rubber powder and a third free radical scavenger. Compared with traditional rubber composite modified asphalt, the modified asphalt of this invention exhibits superior high and low temperature performance, heat and oxygen aging resistance, and storage stability. It also has good workability, minimal performance degradation during long-term high-temperature storage, significantly reduced odor emissions, and a more stable and lasting odor-neutralizing effect.