1214 results about "Anoxomer" patented technology

The invention discloses an anti-aging flame-retardant polyvinyl chloride material and a preparation method thereof. The anti-aging flame-retardant polyvinyl chloride material comprises the following raw material components in parts by weight: 100 parts of PVC resin, 0.6-2.4 parts of a lubricant, 15-27 parts of a plasticizer and 14-25 parts of a composite flame-retardant anti-aging reinforcing filler, wherein the composite flame-retardant anti-aging reinforcing filler is obtained by sequentially carrying out antioxidant loading and polymer grafting modification on a compound of graphene oxide, basic magnesium sulfate whiskers and mesoporous alumina. The prepared polyvinyl chloride has excellent aging resistance, flame retardance and mechanical strength, is good in thermal stability and excellent in comprehensive performance, and has a wide market application prospect.

The invention provides a recyclable and renewable popcorn insole material and a sole thereof. The recyclable and renewable popcorn insole material is prepared from the following raw materials in parts by weight: 60-85 parts of a modified TPU matrix, 3-8 parts of a composite foaming agent, 0.5-2 parts of an antioxidant and 1-5 parts of a compatilizer, the modified TPU matrix is formed by compounding polyether type TPU and polyester type TPU according to the mass ratio of (2 to 5): 1. According to the recoverable and renewable popcorn insole material and the sole thereof provided by the invention, the modified TPU matrix, the composite foaming agent, the antioxidant, the compatilizer and other raw materials are mutually matched, and when the recoverable and renewable popcorn insole material is prepared, the modified TPU matrix is compounded with polyether type TPU and polyester type TPU according to the ratio of (2-5): 1, so that high elasticity is guaranteed by virtue of the polyether type TPU, and the service life of the material is prolonged; the wear resistance and the structural stability are improved through polyester type TPU, and the problem of performance conflict of traditional single TPU is solved; the composite foaming agent has a synergistic effect, the carbon dioxide supercritical foaming agent ensures uniform nucleation of cells, and the AC foaming agent supplements the gas generation amount, so that the defects of low efficiency and non-uniform cells of a single foaming agent are avoided.

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

The invention discloses a high-performance polypropylene material and a preparation method thereof, and belongs to the technical field of high-performance polypropylene, the high-performance polypropylene material is characterized by being prepared from the following components by weight: 50-80 parts of polypropylene, 10-30 parts of inorganic ultrafine particle coated talcum powder, 5-20 parts of a flexibilizer, 2-5 parts of a dispersant, 0.2-0.5 part of an antioxidant, and 0.5-3 parts of a nucleating agent. The invention has the following beneficial effects: the material with excellent comprehensive mechanical properties such as notch impact strength, tensile strength and bending strength is obtained; the inorganic ultrafine particle coated talcum powder has excellent dispersity to form an effective'coating 'or'filling' structure, and also has firm Si-O-Si covalent bonds formed with hydroxyl groups on the surface of the filler, so that the comprehensive performance of the material is improved.

The invention discloses a compression-resistant high-strength composite PP material and a preparation method thereof. Wherein the composite PP material is prepared from the following components in parts by weight: 60 to 80 parts of polypropylene, 5 to 8 parts of aminated polypropylene, 20 to 25 parts of modified glass fiber, 0.2 to 0.8 part of an antioxidant and 0.2 to 1 part of a lubricating agent. Through unique interface design, a stable chemical bridging interface is constructed between the glass fiber and a polypropylene matrix, and the tensile strength of the material is remarkably improved; meanwhile, the DOPO-based flame retardant is immobilized on the surface of the fiber in a covalent bond mode, so that the material is endowed with excellent and lasting flame retardance, and the problem that the mechanical property and flame retardance of a traditional material are difficult to synergistically improve is effectively solved.

The invention discloses a polypropylene composite material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The polypropylene composite material is prepared from the following components in parts by weight: 44 to 60 parts of polypropylene resin, 5 to 15 parts of ethylene-vinyl alcohol copolymer, 10 to 25 parts of modified talcum powder and 15 to 25 parts of toughening agent. The polypropylene resin, the ethylene-vinyl alcohol copolymer, the modified talcum powder, the flexibilizer and the antioxidant are compounded, the compatibility of all the components is good, the compounded material has good bonding performance with other plastic materials (such as PMMA), meanwhile, the tensile strength and impact strength of the polypropylene composite material can be effectively improved, and the service life of the polypropylene composite material is prolonged. The requirements of automobile decorative parts on the adhesive property, the rigidity and the toughness can be met.

The invention discloses low-odor thermoplastic vulcanized rubber for an automobile skin as well as a preparation method and application of the low-odor thermoplastic vulcanized rubber. The raw materials comprise 50 to 80 parts of ethylene-propylene-diene copolymer rubber, 20 to 50 parts of polypropylene, 5 to 15 parts of a compatilizer, 0.5 to 2.5 parts of a compound cross-linking agent, 0.5 to 2.0 parts of an odor adsorbent and 0.5 to 1.0 part of an antioxidant. The preparation method comprises the following steps: banburying and blending, dynamically vulcanizing by using a first double-screw extruder, adsorbing and deeply devolatilizing by using a second double-screw extruder, and carrying out vacuum baking at 100 DEG C. By utilizing the synergistic effect of the cross-linking agent and the assistant cross-linking agent, the degradation of polypropylene is inhibited while the cross-linking efficiency is ensured, and a low-boiling-point reaction by-product (tert-butyl alcohol) is thoroughly removed through a multi-stage devolatilization process, so that the problems that the traditional TPV material is strong in odor and easy to atomize are solved. The smell grade of the obtained material is less than or equal to 3.0 grade, and the atomization value is lt; and the coating is suitable for high-end automotive trim skins.

The invention discloses a high-rigidity and high-toughness polypropylene composite material and a preparation method thereof, the high-rigidity and high-toughness polypropylene composite material comprises 55-70 g of homo-polypropylene, 10-20 g of anti-impact co-polypropylene, 18-25 g of surface modified talcum powder, 3-6 g of chopped glass fiber, 8-12 g of ethylene-octylene copolymer, 3-5 g of maleic anhydride grafted polypropylene, 0.5-1.0 g of polyethylene wax, and 0.3-0.5 g of an antioxidant 1010 and 168 (1: 1) mixture. The invention realizes the following effects: 1, a robust rigid-tough balance design: a reinforcing system with high-content talcum powder as a main body and low-content glass fiber as an auxiliary is adopted to cooperate with a POE (ethylene-octylene copolymer) flexibilizer, so that good low-temperature impact toughness is maintained while the bending modulus stably reaches 2500MPa or above; 2, interface compatibility optimization: the interface combination of the inorganic filler and the matrix is improved through PP-g-MAH, and the dispersity and the mechanical property stability are improved; and 3, process control: through optimized temperature and vacuum degree control, degradation is prevented, good performance reproducibility is ensured, and industrial production is easy.

The invention belongs to the technical field of quenching oil, and discloses low-carbon steel quenching oil as well as a preparation method and application thereof, and the low-carbon steel quenching oil comprises the following components in percentage by mass: 88%-94% of base oil, 3%-7% of a cooling accelerant, 1.5%-2% of a dispersing agent, 0.5%-1.5% of a brightener and 1%-3% of a composite antioxidant, wherein the base oil comprises first base oil and second base oil in a mass ratio of 1: (1.8-2.2), the kinematic viscosity of the first base oil at 40 DEG C is 23 mm < 2 > / s-27 mm < 2 > / s, the kinematic viscosity of the second base oil at 40 DEG C is 86 mm < 2 > / s-90 mm < 2 > / s, and the flash points of the first base oil and the second base oil are both higher than 210 DEG C. According to the quenching oil, the industrial pain points that the cooling speed of traditional quenching oil is difficult to control, a workpiece is prone to deformation and cracking, and the performance is difficult to consider are precisely overcome, perfect balance of ultrahigh strength and excellent toughness is achieved on the basis that it is guaranteed that a material forms an ideal microstructure, and more reliable safety performance support is provided for an automobile anti-collision beam.

The invention discloses a thermoplastic wave-absorbing material as well as a preparation method and application thereof. The thermoplastic wave-absorbing material comprises a silane coupling agent modified absorbent and thermoplastic polyurethane, wherein the thermoplastic polyurethane is prepared from the following raw materials in parts by mass: 100 parts of a polyurethane matrix, 2 to 4 parts of an anti-hydrolysis agent, 2 to 4 parts of an antioxidant, 0.1 to 0.5 part of a mildew preventive and 2 to 10 parts of a plasticizer. The thermoplastic wave-absorbing material disclosed by the invention has good wave-absorbing performance in a range of 1-18GHz, has temperature resistance, flexibility, mechanical strength and environmental adaptability which are equivalent to those of a thermosetting material, and has a wide application prospect. According to the preparation method, extrusion molding is adopted, continuous production can be achieved, use of solvents is reduced, the method is more environmentally friendly, the material can be recycled after being damaged, and therefore the material cost is effectively reduced.

The invention relates to the technical field of hot-melt pressure-sensitive adhesives, in particular to a hot-melt pressure-sensitive adhesive special for instillation type coating and a preparation method of the hot-melt pressure-sensitive adhesive. The hot-melt pressure-sensitive adhesive is prepared from the following raw materials in parts by mass: 25 to 35 parts of styrene block copolymer, 40 to 50 parts of tackifying resin, 20 to 30 parts of plasticizer and 0.1 to 0.5 part of antioxidant. Wherein the styrene block copolymer is preferably compounded from S-1528, 4411ND and 6241A, the tackifying resin is preferably hydrogenated rosin glyceride with the softening point of 85-90 DEG C, and the plasticizer is medical white oil. The 180-degree peel strength of the prepared product is larger than 5.0 N / 25 mm, the 180-degree viscosity is 2000-6500 cps, the instillation precision can reach + / -8 microns, and the product has excellent adhesive performance and process adaptability and is suitable for instillation type coating scenes.

The invention provides a high-shielding-property flame-retardant fire-resistant control cable and a preparation method thereof. The cable sequentially comprises a conductor core wire, a fire-resistant insulating layer, a composite shielding layer and a flame-retardant fire-resistant sheath layer from inside to outside, the invention discloses a preparation method of a traditional Chinese medicine. The flame-retardant fireproof sheath layer is prepared from the following raw materials: 35 to 45 parts of low-smoke halogen-free flame-retardant polyolefin, 15 to 20 parts of ethylene-vinyl acetate copolymer, 8 to 12 parts of polyolefin elastomer, 6 to 10 parts of magnetic montmorillonite-based hybrid electromagnetic shielding filler, 7 to 11 parts of core-shell type ceramic flame-retardant microcapsule, 1.0 to 1.5 parts of silane coupling agent, 2 to 4 parts of basalt fiber and 0.4 to 0.7 part of cross-linking agent. 0.6 to 1.0 part of lubricant, 0.7 to 1.1 parts of stabilizer and 0.3 to 0.6 part of antioxidant. The high-shielding flame-retardant fire-resistant control cable provided by the invention has excellent electromagnetic shielding, flame-retardant and fire-resistant properties, outstanding mechanical strength, good processing fluidity, effective inhibition of thermal degradation and oxidative degradation in high-temperature processing and use processes, and good heat resistance, dimensional stability and use stability.

The invention relates to the technical field of biodegradable high polymer materials, in particular to a tear-resistant high-barrier biodegradable mulching film and a preparation method thereof, and the tear-resistant high-barrier biodegradable mulching film is prepared from the following raw materials in parts by weight: 60-90 parts of poly (butylene adipate-co-terephthalate); 10 to 40 parts of poly (propylene carbonate); 0.5-5 parts of a plasticizer; 0.05 to 0.3 part of a cross-linking agent; 0.1 to 10 parts of talcum powder; 0.1 to 2 parts of a lubricant; 0.1-1 part of an anti-blocking agent; 0.1 to 1 part of an antioxidant; 0.1 to 1 part of an anti-ultraviolet agent; 0.1-1 part of a light stabilizer; 0.1 to 1 part of an anti-hydrolysis agent; 0.1-1 part of a nucleating agent; the plasticizer is poly (1, 2-propylene glycol adipate); and the cross-linking agent is 1, 4-bis (tert-butylperoxy) diisopropyl benzene. The film has good mechanical properties and water vapor transmission amount, can be completely biodegraded, and has good aging resistance.

The invention discloses an ABS (Acrylonitrile Butadiene Styrene) material for a vehicle-mounted USB (Universal Serial Bus) interface shell and a preparation method thereof, and belongs to the technical field of polymer processing modification. Aiming at the technical contradiction that the heat resistance is improved and the toughness is reduced when the existing ABS material is applied to the vehicle-mounted USB interface shell, the composite formula of 40-60 parts of styrene-acrylonitrile copolymer (SAN), 10-40 parts of ABS high rubber powder, 0-5 parts of toughening compatilizer, 0-30 parts of heat-resistant agent, 0.2-1.0 part of antioxidant and 0.1-0.5 part of lubricant is adopted; the material is prepared through a high-speed mixing-twin-screw extrusion granulation process (the length-diameter ratio is 40: 1-50: 1, and the temperature is controlled to be 150-200 DEG C). The Vicat softening temperature of the material is greater than or equal to 107 DEG C (the highest temperature is 115 DEG C), the notch impact strength is greater than or equal to 10.5 kJ / m, and the material has ultrahigh heat resistance and excellent mechanical properties, can be directly used for injection molding of a vehicle-mounted USB interface shell, and can also be popularized to other ABS workpieces with high heat resistance requirements. The process is simple, continuous production can be realized, the cost is controllable, and the industrial application value is remarkable.

The invention provides a low-warpage PC composite material as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The low-warpage PC composite material is prepared from the following raw materials in parts by mass: 45 to 55 parts of PC resin, 15 to 20 parts of modified glass fiber, 8 to 12 parts of filler, 0.8 to 1.2 parts of a core-shell type crystal nucleation warpage inhibitor, 5 to 8 parts of a toughening agent, 0.2 to 0.4 part of an antioxidant, 0.3 to 0.5 part of a lubricating agent and 0.2 to 0.3 part of an ultraviolet light absorber. The PC composite material provided by the invention has low warpage, high rigidity and high fluidity, and can be directly subjected to injection molding to obtain the thin-wall air deflector.

The invention relates to the technical field of adhesives, and particularly discloses an adhesive for repairing a glass fiber reinforced plastic pipeline and a preparation process. The invention relates to an adhesive for repairing a glass fiber reinforced plastic pipeline. The adhesive is prepared from the following raw materials: modified bisphenol A epoxy resin, a curing agent, a glass fiber reinforced filler, a silane coupling agent, phenyl glycidyl ether, hydroxyl-terminated nitrile rubber and an antioxidant 1076, the modified bisphenol A type epoxy resin is prepared by grafting and modifying bisphenol A type epoxy resin through amino-terminated polyether; the glass fiber reinforced filler is prepared from hydroxylated glass fibers and a graphene-carbon nanotube compound through covalent grafting. The adhesive can be used for emergency repair of glass fiber reinforced plastic pipelines, has the advantages of high low-temperature curing speed, high bonding strength and good durability, can effectively avoid cracking and leakage of repaired parts, and is adaptive to low-temperature and high-pressure complex repair working conditions. The preparation process is simple and convenient to operate and high in controllability, the adhesive with uniform performance can be stably prepared, and the repair efficiency and repair quality are guaranteed.

The invention discloses an antibacterial food composite bag and a preparation method thereof, and relates to the technical field of food packaging. The antibacterial food composite bag at least comprises a polyethylene glycol terephthalate outer layer, an aluminum foil middle layer and an antibacterial polyethylene inner layer, the antibacterial polyethylene inner layer comprises the following raw materials in parts by mass: 100 parts of low-density polyethylene, 6-8 parts of a modified halloysite loaded origanum vulgare essential oil antibacterial agent, 1-3 parts of a silver-carbon dot composite antibacterial agent and 5-15 parts of low-density polyethylene grafted acrylic acid; 0.5 to 1.5 parts of an antioxidant; and 0.1 to 0.3 part of an initiator. The modified halloysite loaded origanum vulgare essential oil antibacterial agent and the silver-carbon dot composite antibacterial agent are compounded for use, so that the prepared antibacterial food composite bag has the advantages of wide antibacterial spectrum and long time efficiency, and the shelf life of food can be prolonged.

The invention relates to the technical field of cables, and provides a fireproof flame-retardant cable and a preparation method thereof. The fireproof flame-retardant cable comprises a conductor, an insulating layer and a sheath layer which are sequentially arranged from inside to outside, and the sheath layer is prepared from, by weight, 40-50 parts of high-density polyethylene, 30-40 parts of ethylene-vinyl acetate copolymer, 30-40 parts of flame retardant, 15-20 parts of filler, 8-10 parts of plasticizer, 2-4 parts of lubricant, 2-4 parts of antioxidant, 2-3 parts of stabilizer and 2-3 parts of cross-linking agent; the flame retardant is prepared from the following component raw materials in parts by weight: 30 to 40 parts of magnesium hydroxide, 10 to 15 parts of aluminum hydroxide, 4 to 5 parts of zinc borate, 3 to 4 parts of diethyl phosphoryl ethyl triethoxy silane and 1 to 1.5 parts of 2-(2-pyridyl) ethyl trimethoxy silane. According to the technical scheme, the problem of insufficient fireproof and flame-retardant performance of the cable in the prior art 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 a polyamide cable material as well as a preparation method and application thereof. The cable material is prepared from the following raw materials in parts by weight: 100 parts of polyamide, 10 to 40 parts of nano magnesium hydroxide whisker, 1 to 5 parts of silane coupling agent, 1 to 5 parts of amphiphilic block copolymer, 1 to 10 parts of pentaerythritol triacrylate and 1 to 5 parts of antioxidant, wherein the fiber length of the nano magnesium hydroxide whisker is 200 to 1000 nm, and the fiber diameter of the nano magnesium hydroxide whisker is 30 to 80 nm. The polyamide cable material has good temperature resistance (can tolerate the high temperature of 135 DEG C for a long time), flame retardance (the limit oxygen index can reach 31% or above, preferably 33.5%), mechanical properties (excellent tensile strength and low-temperature impact resistance) and relatively high volume resistivity.

The invention relates to the technical field of feed additives, and discloses a coloring agent added to broiler feed as well as a preparation method and application of the coloring agent. Based on the total mass of the broiler feed, the coloring agent added to the broiler feed comprises the following components: 0.5 wt%-2.0 wt% of grease, 0.2 wt%-1.5 wt% of pigment and 0.01 wt%-0.1 wt% of a fat-soluble antioxidant. According to the broiler chicken feed containing the coloring agent, in the feeding cycle of 14-21 days, the breast skin color of capons with poor coloring can be improved by about 1.5 degrees, the chromaticity of the shanks can be improved by 2-3 degrees, the capons with poor appearance quality can be improved to the ideal chromaticity range purchased in the market, and the commodity grade and the selling price are remarkably improved.

The invention discloses heat-resistant modified epoxy resin and a preparation method thereof, and belongs to the technical field of high polymer materials. The heat-resistant modified epoxy resin is prepared from the following components in parts by mass: 45 to 55 parts of matrix epoxy resin, 10 to 20 parts of methyl phenyl silicone resin, 8 to 12 parts of nano silicon dioxide, 0.8 to 2.0 parts of a silane coupling agent, 6 to 10 parts of a curing agent, 0.3 to 0.8 part of an accelerant, 15 to 30 parts of silica fume powder and 0.5 to 1.2 parts of an antioxidant. By introducing components such as methyl phenyl silicone resin and nano silicon dioxide with a specific particle size, and combining the synergistic effect of the silane coupling agent, the heat resistance of the epoxy resin is effectively improved; the antioxidant with a specific structure is used, and the performance retention rate of the modified epoxy resin under a thermo-oxidative aging condition is remarkably improved, so that the service life of the material is prolonged, and the long-term stability of the material in a high-temperature environment is enhanced.

The invention discloses a hydrolysis-resistant PBT reinforced material capable of being subjected to laser welding and a preparation method of the hydrolysis-resistant PBT reinforced material, and belongs to the field of engineering plastics. Comprising the following raw materials in parts by mass: 45-70 parts of PBT resin, 0.5-1 part of a nucleating agent, 0.5-1 part of a nucleating auxiliary agent, 0.1-1 part of an antioxidant, 0.1-1 part of a lubricant, 0.2-0.8 part of a hydrolysis-resistant agent, 1-3 parts of a toughening agent and 25-45 parts of glass fibers, the nucleating auxiliary agent is sodium-doped potassium aluminosilicate. The nucleating agent can improve the crystallization rate of PBT, refine the grain size and reduce light scattering, and the hydrolysis-resistant agent can block autocatalytic hydrolysis circulation. And the composite sodium-doped potassium aluminosilicate not only can provide a large number of sites for PBT nucleation, but also can adsorb and capture water molecules in the environment and small molecules in an adsorption material and reduce hydrolysis reaction, so that the reinforced PBT material can be suitable for laser welding, and the long-term stability of the material in a high-temperature and humid environment can be guaranteed.

The application discloses a long-acting thixotropic rust-proof oil composition which is composed of the following components in mass fraction: base oil 70-95 parts, rust-proof agent 5-15 parts, auxiliary rust-proof agent 1-5 parts, antioxidant 0.1-1 part, thixotropic agent 1-20 parts and film forming agent 1-5 parts. The application also discloses a preparation method thereof, wherein after the components are weighed, the base oil is heated and stirred, and then added into the film forming agent to obtain mixture A; the mixture A is added into the thixotropic agent, the rust-proof agent, the auxiliary rust-proof agent and the antioxidant in sequence, and then constant-temperature stirring is conducted to obtain mixture B; after the mixture B is filtered, the filtrate is the composition of the application. The long-acting thixotropic rust-proof oil composition has a high thixotropic index, is not prone to flowing, and can keep a stable oil film thickness on the surface of a workpiece; under the conditions of damp heat and salt spray, the long-acting thixotropic rust-proof oil composition can exhibit more excellent rust-proof performance, and is suitable for harsh storage or transportation conditions such as sea transportation.

The invention discloses a low-dielectric insulation fixing adhesive and a preparation method thereof, and belongs to the technical field of fixing adhesives. The raw materials comprise, by weight, 25-40 parts of an epoxy resin matrix, 5-10 parts of a modified silane coupling agent, 15-30 parts of a low dielectric filler, 8-15 parts of a curing agent, 3-8 parts of a toughening agent, 2-5 parts of a diluent, and 0.5-2 parts of an antioxidant; the low dielectric filler is a composite filler of hollow glass beads and boron nitride, the mass ratio of the hollow glass beads to the boron nitride is (2-3): 1, and the modified silane coupling agent is a gamma-aminopropyltriethoxysilane grafted maleic anhydride modified product; according to the invention, the dielectric constant and the dielectric loss of the adhesive can be reduced, and the insulating property, the bonding strength and the compatibility with a base material can be improved at the same time.

This invention discloses a method for synergistic surface modification of tungsten-copper powder to inhibit the decomposition of polyoxymethylene (POM), belonging to the field of polymer material anti-degradation modification technology. This invention addresses the problem that tungsten-copper powder easily catalyzes the severe degradation of POM during PIM tungsten-copper feedstock mixing and injection molding, leading to poor feedstock flowability, injection instability, large fluctuations in product size and weight, and low yield. First, the tungsten-copper powder is activated by low-temperature plasma etching to construct a reaction interface. Then, a silica barrier film is prepared using tetraethyl orthosilicate as the silicon source and modified with fluorosilicone, loaded with a metal soap neutralizer, grafted with a hindered phenolic antioxidant, and simultaneously introduced with epoxy active groups to construct a multi-component synergistic degradation inhibition system. This invention, through multi-step synergistic modification, precisely controls the modification process, comprehensively inhibiting POM decomposition. When the modified powder is blended with POM, a capping reaction occurs, blocking the unzipping degradation pathway of POM, improving the compatibility of the filler and the matrix, and ensuring the continuous and stable preparation and injection molding of PIM tungsten-copper feedstock.

The application relates to the technical field of composite materials, and discloses a prefabricated air-permeable coiled material and a preparation method thereof. From top to bottom, the prefabricated air-permeable coiled material comprises a surface layer and a bottom layer. The surface layer comprises the following raw materials in parts by weight: SEBS 30-40 parts, polypropylene 15-22 parts, a first filler 15-25 parts, a softening agent 25-30 parts, an antioxidant 1-3 parts and maleic anhydride grafted polypropylene 1-3 parts. The bottom layer comprises the following raw materials in parts by weight: SEBS 15-22 parts, polypropylene 30-40 parts, a second filler 20-30 parts, a softening agent 25-30 parts and maleic anhydride grafted polypropylene 1-3 parts. The first filler and the second filler are both calcium-containing compounds. Through the technical scheme, the problems of poor air permeability, wear resistance and mechanical properties of the prefabricated coiled material in the related art are solved.

This invention discloses an MPP pipe for power cables and its preparation method, relating to the field of polymer materials technology. The invention comprises, by weight, 80-90 parts of a toughening nucleating agent; 40-45 parts of an insulating nucleating agent obtained by in-situ composite and gradient temperature imidization treatment of a polyamic acid prepolymer prepared from hexagonal boron nitride nanosheets (prepared by surface modification with dopamine hydrochloride, followed by modification with octyltriethoxysilane) to obtain a silanized boron nitride suspension; 40-45 parts of melamine cyanurate; 2.1-2.4 parts of an antioxidant; 2.6-3 parts of a light stabilizer; 8-9 parts of a lubricant; and 1340-1500 parts of polypropylene. The introduction of the toughening nucleating agent and insulating nucleating agent in this invention effectively improves the flame retardancy, low-temperature rigidity-toughness balance, and aging resistance of the MPP pipe.

The invention relates to the field of high polymer materials, and discloses a high-density polyethylene composition, a high-density polyethylene material and a preparation method and application thereof. The high-density polyethylene composition contains high-density polyethylene, polyethylene wax, an acid acceptor, a slipping agent and an antioxidant; on the basis of the total weight of the high-density polyethylene composition, the content of the high-density polyethylene is 95 to 99.5 wt%, the content of the polyethylene wax is 0.1 to 4 wt%, the content of the acid acceptor is 0.05 to 0.3 wt%, the content of the slipping agent is 0.05 to 0.5 wt%, and the content of the antioxidant is 0.05 to 0.3 wt%. The high-density polyethylene material prepared from the high-density polyethylene composition has the advantages of low machine head pressure, small pressure change and stable pressure rise curve, and the screen exchange period can reach more than 30 days.

The invention provides a PP turnover box material and a preparation method thereof. The PP turnover box material is prepared from the following components in parts by weight: 35 to 80 parts of industrial waste PP glass fiber regenerated material, 10 to 40 parts of antistatic master batch, 5 to 20 parts of glass fiber, 5 to 16 parts of carbon fiber, 3 to 5 parts of compatilizer, 0.3 to 1 part of coupling agent, 0.5 to 1 part of lubricant and 0.3 to 0.5 part of antioxidant. According to the invention, the industrial waste PP glass fiber reclaimed material is adopted to completely replace a new PP material, and meanwhile, the carbon fiber is added, so that the use amount of the antistatic master batch is reduced, the PP turnover box material is lighter, the mechanical property and the antistatic property are better, and potential safety hazards caused by static electricity of the PP turnover box are avoided.