493 results about "Hindered phenol" patented technology

The invention relates to the technical field of polypropylene plastics, in particular to a high-strength antibacterial polypropylene plastic and a preparation method thereof. The antibacterial polypropylene material comprises the following components in parts by weight: 60-80 parts of polypropylene resin, 5-15 parts of nano titanium dioxide and nano zinc oxide composite particles modified by a special organosilicon polymer, 3-8 parts of an antibacterial agent compounded by quaternary ammonium salt and bioactive peptide, 5-10 parts of a core-shell structure MBS toughening agent and 0.5-2 parts of a hindered phenol-thioether composite antioxidant. 1-3 parts of a calcium stearate processing aid; and 3-8 parts of dopamine modified chopped carbon fibers. The composite material is high in strength, tensile strength, bending strength and impact strength are remarkably improved, and larger external force can be borne; the antibacterial performance is excellent, and the antibacterial rate reaches 95%-99%; the preparation process is environment-friendly and efficient, and the product is good in stability and recoverable; product safety can be guaranteed, the service life is prolonged, and economic and social benefits are good.

The invention relates to the field of drain pipes, and discloses an antibacterial polypropylene noise-reduction drain pipe and a preparation method thereof, the antibacterial polypropylene noise-reduction drain pipe comprises polypropylene, modified glass fiber, an antibacterial additive, a compatilizer and a stabilizer; the modified glass fiber is prepared by performing formylation modification on glass fiber by using 3-aminopropyltriethoxysilane and glutaraldehyde, grafting triethylene tetramine and DOPO into a glass fiber structure, and then grafting a hindered phenol antioxidant; the antibacterial additive is prepared by compounding chitosan Schiff base and modified nano titanium dioxide, the chitosan Schiff base is prepared by utilizing a Schiff base reaction between chitosan and vanillin, and the modified nano titanium dioxide is prepared by utilizing isocyanate propyl triethoxy silane and ethyl glycolate to modify nano titanium dioxide. By adding the modified glass fiber and the antibacterial additive, the pipe is endowed with excellent heat resistance, aging resistance, flame retardance and antibacterial performance.

The invention discloses a graphene antistatic PC composite material and a preparation method thereof, and belongs to the technical field of composite materials. 150-160 parts of polycarbonate resin, 10-20 parts of modified graphene, 2-5 parts of light stabilizer, 2-5 parts of ultraviolet absorber, and 2-5 parts of lubricant are weighed by weight and added to a high-speed mixer, and sent into a twin-screw extruder after mixing evenly, and after melt extrusion, cooled and pelletized to obtain a graphene antistatic PC composite material. The modified graphene contains graphene, quaternary ammonium salt structure and hindered phenol structure, and the modified graphene contains lipophilic benzene ring and long carbon chain, so the modified graphene has good compatibility with the polycarbonate resin containing benzene ring and other raw materials, and the modified graphene can be evenly dispersed in the composite material, and is not easy to agglomerate, so that the modified graphene can fully play a role, giving the composite material excellent antistatic, antibacterial and anti-aging properties.

The invention discloses a melt blending preparation process of a semiconductive shielding material for an ultrahigh-pressure crosslinked polyethylene cable, which comprises the following steps: S1, premixing low-density polyethylene and an ethylene-vinyl alcohol copolymer in proportion, the vinyl alcohol chain segment content of the ethylene-vinyl alcohol copolymer being 25%-45%; s2, performing plasma surface treatment on carbon black, and compounding the carbon black with carbon nanotubes to form a conductive filler system; s3, under the protection of inert gas, adding the matrix resin in the step S1 and the conductive filler in the step S2 into a double-screw extruder in stages, and synchronously adding a hindered phenol and phosphite compound antioxidant; and S4, carrying out segmented mixing under the temperature gradient of 160-210 DEG C. Through synergistic compounding of the plasma surface modified carbon black and the carbon nanotubes and in combination with a staged feeding process, directional dispersion of the conductive filler is realized, a three-dimensional interpenetrating conductive network is formed, and the local electric field homogenization capability of the ultrahigh-voltage cable is remarkably improved.

The invention discloses modified asphalt and a preparation process thereof, and belongs to the technical field of road materials. The modified asphalt is prepared from 80-90 parts of matrix asphalt, 4-8 parts of butadiene styrene rubber, 2-5 parts of nano montmorillonite, 1.5-3 parts of core-shell structure nanoparticles (the core is SiO2 grafted with-SO3H, the middle layer is thermo-sensitive PNIPAM containing a photoinitiator, and the shell is GO grafted with a hindered phenol antioxidant group and a photosensitive coumarin group), 1-3 parts of a compatilizer, 3-6 parts of a plasticizer and 0.3-0.8 part of an antioxidant. The preparation process comprises the following steps: pretreating the modifier master batch, performing melt blending, performing high-speed shearing, performing ultrasonic dispersion, cooling, discharging and the like. The light response crosslinking mechanism is utilized, crosslinking is achieved under illumination through the light response characteristic of the core-shell structure nanoparticles, the high-temperature stability, the anti-aging performance and the fatigue life of the modified asphalt are remarkably improved, and the modified asphalt is suitable for the fields of high-grade road construction and the like.

The invention relates to the technical field of high polymer materials, and particularly discloses a fluoride-free halogen-free flame-retardant polycarbonate material and a preparation method and application thereof.The fluoride-free halogen-free flame-retardant polycarbonate material is prepared from, by weight, 70-90 parts of polycarbonate resin, 8-15 parts of phosphorus-nitrogen flame retardant and 3-8 parts of silicon flame-retardant synergist, the composite material is prepared from the following raw materials in parts by weight: 20-30 parts of polypropylene, 2-5 parts of nano reinforcing filler, 0.1-0.5 part of hindered phenol antioxidant, 0.1-0.5 part of phosphite ester antioxidant and 0.1-0.5 part of pentaerythritol stearate. Through the synergistic effect of the composite flame-retardant system and the nanofiller, high flame retardance (UL94 V-0 level, 1.5 mm thickness), high heat resistance (the heat distortion temperature is greater than or equal to 130 DEG C) and excellent mechanical property are realized, the control is easy, the processing is stable, good balance of flame retardance and mechanical property is achieved on the premise of environmental protection, and the composite flame-retardant material is suitable for the fields of high-end household appliances and consumer electronics.

The invention relates to the technical field of transfer films, in particular to a graphene-containing far-infrared warm-keeping polyurethane transfer film and a preparation method thereof. The far-infrared warm-keeping polyurethane transfer film containing graphene comprises a three-layer structure including a supporting layer, a polyurethane transfer layer and a bonding layer, the polyurethane transfer layer is located on one side of the supporting layer, and the bonding layer is located on the other side of the polyurethane transfer layer; the polyurethane transfer layer is prepared from polyurethane resin, an organic solvent, an organic pigment and a composite modifier, the composite modifier is prepared from alkenyl modified graphene oxide, chloropropenyl modified hindered phenol and 4-allyloxy-2-hydroxybenzophenone, and the composite modifier is added, so that the polyurethane transfer layer is formed. The polyurethane transfer film has far infrared thermal insulation performance and good oxidation resistance and hydrolysis resistance.

The invention discloses an antistatic agent for polyolefin film material production and a preparation method thereof. According to the invention, through reasonable molecular structure design, raw material selection and synthesis process optimization, the antistatic agent has multiple functions of high-efficiency antistatic property, oxidation resistance, antibacterial property, mechanical property enhancement and the like. The polyolefin material added with the multifunctional antistatic agent has good antistatic performance under different environmental conditions, and the oxidation resistance, the antibacterial property and the mechanical property are also remarkably improved. The antistatic agent has good adaptability with processing of a polyolefin film material and has wide application prospects and market competitive advantages, and the comprehensive performance of the polyolefin film material is remarkably improved through multi-component collaborative design. The composite system of the polyolefin quaternary ammonium salt and the graphene quantum dots strengthens the long-term effect of the antistatic effect, and meanwhile, the synergistic effect of the hindered phenol and the phosphite strengthens the antioxidant stability of the material in the processing and using processes.

The invention discloses a graphene antistatic PC composite material and a preparation method thereof, and belongs to the technical field of composite materials. 150-160 parts of polycarbonate resin, 10-20 parts of modified graphene, 2-5 parts of light stabilizer, 2-5 parts of ultraviolet absorber, and 2-5 parts of lubricant are weighed by weight and added to a high-speed mixer, and sent into a twin-screw extruder after mixing evenly, and after melt extrusion, cooled and pelletized to obtain a graphene antistatic PC composite material. The modified graphene contains graphene, quaternary ammonium salt structure and hindered phenol structure, and the modified graphene contains lipophilic benzene ring and long carbon chain, so the modified graphene has good compatibility with the polycarbonate resin containing benzene ring and other raw materials, and the modified graphene can be evenly dispersed in the composite material, and is not easy to agglomerate, so that the modified graphene can give full play to the effect, giving the composite material excellent antistatic, antibacterial and anti-aging properties.

The invention relates to the technical field of cables, in particular to a high-flexibility ethylene-propylene insulating rubber material for a charging pile cable and a preparation process. The composite material comprises an ethylene propylene diene monomer, a thermoplastic polyolefin elastomer, an ethylene-butylene copolymer, nanoscale magnesium hydroxide, a silane coupling agent, dicumyl peroxide, a hindered phenol antioxidant and a phosphite antioxidant. The ethylene propylene diene monomer and the ethylene-butylene copolymer form a flexible network skeleton, and the ethylene-butylene copolymer and the thermoplastic polyolefin elastomer are subjected to molecular-level blending, so that the elongation at break and the bending fatigue resistance are improved; silane coupling agent modified nano magnesium hydroxide is chemically bonded with a rubber matrix, so that the flame retardance and thermal aging resistance are enhanced, and the negative influence of filler agglomeration on flexibility is reduced; the compound antioxidant system effectively inhibits thermal oxidation degradation at high temperature, avoids insulation failure, realizes collaborative optimization of high flexibility and high heat resistance, and improves the reliability and applicability of the charging pile cable.

The invention provides a PVC (polyvinyl chloride) stabilizer for ultrathin-wall automobile wires and a preparation method of the PVC stabilizer. The PVC stabilizer for the ultrathin-wall automobile wire comprises the following components in parts by weight: 15-25 parts of calcium-zinc composite metal soap, 5-10 parts of hydrotalcite, 3-8 parts of a beta-diketone compound, 2-5 parts of a hindered phenol antioxidant, 1-3 parts of a phosphite ester antioxidant, 2-5 parts of a lubricant, 1-3 parts of an ultraviolet light absorber, 0.5-2 parts of a coupling agent, 4-5 parts of calcined clay and 5-15 parts of filler. According to the PVC stabilizer for the ultrathin-wall automobile wire and the preparation method of the PVC stabilizer, the calcium-zinc composite metal soap, the hydrotalcite, the beta-diketone compound and other stabilizers have a synergistic effect, so that the PVC stabilizer has excellent thermal stability; according to the present invention, the material can effectively inhibit the oxidative degradation of the PVC during the processing and using process, can prolong the service life of the wire, and can provide the good insulation stability through the minimum addition proportion of the calcined clay so as to ensure the thermal stability and the mechanical physical property of the material.

The invention relates to the technical field of adhesives, and discloses an anti-aging polyurethane sealant and a preparation method thereof.The polyurethane sealant is prepared by the steps that polyether polyol and binary isocyanate serve as raw materials and react under the action of a catalyst to form a polyurethane prepolymer, then a functional chain extender is used for conducting chain extension on the prepolymer to form polyurethane latex, and then the polyurethane latex is subjected to heat preservation to form the anti-aging polyurethane sealant. The structure of the functional chain extender contains a hindered phenol antioxidant group, and the hindered phenol antioxidant group is introduced into a polyurethane molecular chain by adopting a chemical grafting mode, so that the aging resistance of the polyurethane sealant can be effectively improved, the aging resistance durability of the polyurethane sealant is guaranteed, and the service life of the polyurethane sealant is prolonged. Therefore, the service life and the application value of the polyurethane sealant are effectively improved.

The invention relates to a composite resin material for 3D printing and a preparation method thereof. The material is prepared from the following raw materials in parts by weight: 60-90 parts of polylactic acid, 5-15 parts of a toughening agent, 5-15 parts of a flame retardant, 5-10 parts of modified carbon nanotubes, 0.3-1 part of an anti-hydrolysis agent and 0.3-0.5 part of a lubricant. The flame retardant is added, a phosphate structure, a benzene ring and a hindered phenol structure are introduced into 5, 5 '-dibromo-[2, 2'-bipyridyl]-3, 3 '-diamine, and efficient flame retardance is achieved and the anti-aging performance of the composite resin material is enhanced through multiple synergistic effects of hindered phenol-phosphorus heterocycle-bipyridyl. The modified carbon nanotube is added as a reinforcing agent, so that the mechanical property of the composite resin material is remarkably improved, and the composite resin material is endowed with antibacterial property.

The invention provides low-viscosity high-wear-resistance vehicle engine oil and a preparation method thereof, and belongs to the technical field of engine oil. According to the preparation method, an ionic liquid group is introduced through a reaction, a nano interlayer compound is constructed by combining surface modification of a metal-ionic liquid complex and silicon dioxide nanoparticles, and a microcapsule structure is formed through coating of a urea-formaldehyde prepolymer; the ionic liquid group provides a low friction coefficient and thermal stability, the silicon dioxide nanoparticles provide physical isolation and wear-resistant protection, and the microcapsules realize controlled release and dynamic repair of the lubricating components; a skeleton polymer is prepared through a reaction of polyamidoamine and epoxy chloropropane so as to provide abundant active sites, and oxidation resistance is improved through a synergistic effect of the skeleton polymer, hindered phenol and calixarene; by combining oleic acid modified nanoparticles, the dispersity and the wear resistance are enhanced, and meanwhile, dynamic protection is provided on a friction interface; the synergistic effect prolongs the service life of the engine oil and improves the high-temperature stability of the engine oil.

The invention discloses a preparation method of a high-heat-resistance glass fiber reinforced polypropylene material. The preparation method comprises the following steps: uniformly mixing a hindered phenol antioxidant and a phosphine salt to obtain a heat-resistant auxiliary agent; the preparation method comprises the following steps: adding PP, chopped glass fibers, a heat-resistant auxiliary agent and thioester into a mixer, fully mixing, extruding by using a same screw extruder at the extrusion temperature of 210 + / -2 DEG C, and drying in a hot air environment of 100 + / -2 DEG C for 1-2 hours to obtain the high-heat-resistant glass fiber reinforced polypropylene material. The preparation method is simple, the raw materials are easy to obtain, the cost is low, the obtained high-heat-resistance glass fiber reinforced polypropylene material has the excellent performance of traditional PP-GF30, the heat resistance is remarkably improved, and the high-heat-resistance glass fiber reinforced polypropylene material can be suitable for high-temperature-resistant components including engine covers.

The invention discloses a colored permanent antistatic PETG material applied to 3D printing. The colored permanent antistatic PETG material comprises the following components in parts by weight: 50-80 parts of a PETG material, 5-20 parts of a PC material, 10-30 parts of a permanent antistatic agent, 5-15 parts of a reinforcing agent, 1-5 parts of a lubricant, 1-5 parts of a compatilizer, 0.1-0.5 part of a coupling agent, 0.1-0.4 part of a hindered phenol antioxidant, 0.1-0.4 part of a phosphite antioxidant, 0.1-0.4 part of a plasticizer and 0.1-0.4 part of toner. The composite material has the beneficial effects that a PETG / PC alloy modification mode is used, so that the heat resistance, the mechanical property and the interlayer adhesive force of the PETG composite material are improved; the high-molecular permanent antistatic agent is used, so that the antistatic capacity of the material is improved under the condition that the color of PETG is not influenced, and the problem that a conventional carbon nanotube / conductive carbon black modified antistatic PETG material cannot be subjected to color matching is solved.

The invention discloses a preparation method of reactive antioxidant grafted modified nylon 6 and a film thereof, and belongs to the technical field of nylon modification. A reactive antioxidant containing a hindered phenol structure and nylon 6 are subjected to melt chemical grafting to form a covalent bond combined nylon 6-antioxidant system, and hindered phenol provides hydrogen atoms and can be combined with free radicals generated in the aging process, so that the chain reaction of the hindered phenol is terminated, and phenoxy free radicals with low activity are formed by the hindered phenol. According to the invention, the reactive antioxidant grafted modified nylon 6 is further processed into a film product, and the nylon 6 film product prepared by the method has the advantages of less antioxidant migration, aging resistance, high mechanical property retention rate and the like.

The invention discloses a hindered phenol monomer containing organic phosphorus heterocyclic rings as well as a preparation method and application of the hindered phenol monomer. The hindered phenol monomer has any one of the following structures: R is selected from-(CH2) b-or an aromatic ring, b is 3 or 4, and the aromatic ring comprises a benzene ring and / or a furan ring. The intrinsic flame-retardant anti-droplet polymer provided by the invention has the characteristics of excellent flame retardance and no droplet, and meanwhile, the intrinsic flame retardant is copolymerized into a molecular chain, so that the intrinsic flame-retardant anti-droplet polymer is not easy to migrate, does not permeate into the surrounding environment, is stable in property, can be used for injection molding and spinning, and can be used for preparing flame-retardant blocky products and fabrics; the composite material is used for interiors of electric appliances, switches, firefighter uniform, military uniform, automobiles, high-speed rails and other limited spaces.

The invention belongs to the technical field of fiber felts, and particularly relates to a preparation method of a bamboo / wood / PP fiber felt for automotive interiors and a composite material of the bamboo / wood / PP fiber felt.The bamboo / wood / PP fiber felt is formed by opening, scattering, fully mixing and carding mixed fibers composed of wood fibers and modified bamboo fibers and PP fibers to form a fiber net, and then the fiber net is needled to form a dense felt material; wherein the modified bamboo fiber is prepared by the following steps: mixing 3, 5-di-tert-butyl-4-hydroxybenzaldehyde, methyl undecyl ketone, a sodium hydroxide solution and ethanol for reaction to obtain a hindered phenol material; mixing and reacting the hindered phenol material, chloroplatinic acid and tetrahydrofuran to obtain a long-chain alkyl hindered phenol grafted material; bamboo fibers, an ethanol solution and the long-chain alkyl hindered phenol grafting material are mixed and react, and modified bamboo fibers are obtained; the ultraviolet light stability of the bamboo / wood / PP fiber felt for the automotive trim is improved, and the tensile property of the bamboo / wood / PP fiber felt for the automotive trim can be greatly enhanced.

The invention relates to a corrosion-resistant polypropylene modified plastic and a preparation method thereof, and belongs to the technical field of polypropylene plastic modification. The modified plastic is prepared from isotactic polypropylene, exfoliated montmorillonite, polyvinylidene fluoride powder, anhydride grafted polypropylene, a beta-crystal nucleating agent, diethyl aluminum chloride, peroxide, hindered phenol, phosphite ester and N, N-distearoyl hydroxylamine. The preparation method comprises the steps of low-shear melting and blending, high-shear supercritical COviscosity reduction, vacuum exhaust, bidirectional orientation, infrared local crosslinking, co-extrusion cooling and the like. The obtained material is excellent in tensile strength, elongation at break, low-temperature impact strength, strong acid corrosion resistance and the like.

The invention relates to the technical field of preparation of polyurethane plastic materials, in particular to an environment-friendly high-elasticity foaming material as well as a preparation method and application thereof. The preparation method of the foaming material comprises the following steps: perfluorooctyl sulfonyl fluoride and diaminopropyl polydimethylsiloxane are subjected to a reaction, and fluorine-containing polydimethylsiloxane is obtained; the preparation method comprises the following steps: reacting 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propanohydrazide with terephthalic diisothiocyanate to obtain isothiocyanate modified hindered phenol; the isothiocyanate modified hindered phenol reacts with primary amine at the terminal position of a fluorine-containing polydimethylsiloxane molecule through an isothiocyanate group to obtain an intermediate, and the intermediate is subjected to a desulfurization reaction to obtain a modifier; the preparation method comprises the following steps: reacting diisocyanate with polyether polyol, polyester polyol and natural polyol to obtain a component A, and stirring and mixing polyether polyol, a bio-based chain extender, a modifier, a catalyst and a foaming agent to obtain a component B; stirring and mixing the component A and the component B, and foaming to obtain the environment-friendly high-elasticity foaming material.

The invention discloses a high-temperature durable epoxy resin coating and a preparation method thereof, and relates to the technical field of epoxy resin coatings. The novel epoxy resin is prepared from 1, 3, 5-tris (2-propynyloxy) benzene, 3-azido butanol and glycidyl methacrylate as raw materials, the novel epoxy resin has multiple functional groups, the crosslinking degree of the coating can be improved, the epoxy resin coating can have high thermal stability due to introduction of a benzene ring and a triazole structure, and the epoxy resin coating can be applied to the field of coating materials. The heat resistance of the coating is improved; secondly, grafting 2-benzoyl-4, 5-dichlorobenzoic acid onto calcium silicate, and then hydrolyzing to prepare a novel hindered phenol antioxidant; calcium silicate is used for loading the antioxidant, a stable loading platform can be provided for the antioxidant, and active groups on the surface and the antioxidant generate a synergistic effect, so that the oxidation resistance is further improved, the anti-aging performance of the coating is improved, and the service life of the coating is prolonged. The high-temperature durable epoxy resin coating prepared by the invention has the effects of high temperature resistance and durability.

The invention discloses an anti-aging PE-based pressure-sensitive adhesive protective film and a preparation method thereof.The anti-aging PE-based pressure-sensitive adhesive protective film is prepared by coating one side of a PE base film with an acrylate pressure-sensitive adhesive and drying the acrylate pressure-sensitive adhesive, a PE base film molecular chain on the surface of the anti-aging PE-based pressure-sensitive adhesive protective film contains a fluorine-containing polysiloxane structure, fluorine atoms can form a protective layer on the surface, and therefore the anti-aging PE-based pressure-sensitive adhesive protective film has good anti-aging performance. The bond energy of a C-F bond is higher than the photon energy in ultraviolet rays, so that the ultraviolet rays cannot break the C-F bond, the ultraviolet ray resistant effect of the PE base film is further improved, the interpenetration of a polysiloxane chain segment can improve the thermo-oxidative aging resistant effect of the PE base film, and the polysiloxane chain segment is matched with an internal hindered phenol structure, so that the aging resistant effect of the PE base film is further improved, and the service life of the PE base film is prolonged. Meanwhile, due to the addition of the modified filler, an inorganic protective layer can be formed in the PE base film, so that ultraviolet light is prevented from entering the material, the acrylate pressure-sensitive adhesive cannot be interfered by the ultraviolet light, and the service life is prolonged.

The invention discloses a special spinning oil agent for PEEK fine denier monofilament, which comprises the following components in percentage by mass: 35-65% of smoothing agent, which is prepared by mixing heat-resistant synthetic ester and polyether modified siloxane according to the mass ratio of (2-5): 1; the composite antistatic agent is formed by mixing alkyl sulfonate and potassium alkyl phosphate according to the mass ratio of 1: (1-2); the compound emulsifier is formed by mixing fatty alcohol-polyoxyethylene ether and castor oil polyoxyethylene ether according to the mass ratio of (1-3): 1; 4-12% of a high temperature resistant additive, which is tricresyl phosphate; 1-6% of a bundling agent which is a polyoxyethylene ether compound; 0.5-4% of a fiber splitting agent, which is a siloxane derivative; the functional additive is prepared by mixing a hindered phenol antioxidant and nano silicon dioxide according to the mass ratio of (1-3): 1; and 5-15% of deionized water. The high-temperature-resistant antistatic emulsion has the advantages of excellent high-temperature resistance, antistatic effect and emulsion stability.

The invention discloses an oxidation-resistant monomer casting nylon material and a preparation method thereof, and relates to the field of material preparation, and the monomer casting nylon material is applied to a high-temperature and oxygen-enriched environment and comprises the following components in parts by mass: 100 parts of caprolactam; 0.1-0.3 part of a catalyst which is one of sodium hydroxide, potassium hydroxide or lithium hydroxide; 0.5 to 1.5 parts of an activating agent, wherein the activating agent is N-acetyl caprolactam; 0.7 to 3 parts of a main antioxidant, wherein the main antioxidant comprises a hindered phenol antioxidant and a thioester antioxidant; 0.1-0.5 part of an auxiliary antioxidant, which is a metal deactivator; 1-3 parts of an inorganic filler which is modified montmorillonite; and 0.5-2 parts of a hydrophobic agent which is a silane coupling agent. By constructing a composite anti-oxidation system, multi-level synergistic protection can be formed for three key oxidation stages of free radical initiation, peroxide accumulation and metal catalysis, and a full path of an oxidation chain reaction is covered from a molecular level, so that the aging process of the material is remarkably delayed, and the service life of the material is prolonged. And high oxygen resistance and relatively long service life are provided for nylon application under severe working conditions.

The invention discloses a preparation method of a new energy battery pack cover plate flame-retardant PP material, and relates to the technical field of polymer flame-retardant materials. The preparation method comprises the following steps: sequentially adding phosphate esterified polypropylene, a maleic anhydride grafted polyolefin elastomer, polyether block amide, modified nano clay, a B-P-triazinyl charring agent, a carbodiimide type anti-hydrolysis agent, a hindered phenol antioxidant, short carbon fibers, polytetrafluoroethylene micro powder and modified hollow glass beads into a mixing mill; and adding the obtained premix into a twin-screw extruder, extruding, pelletizing, and carrying out injection molding to obtain the flame-retardant PP material for the cover plate of the new energy battery pack. The prepared new energy battery pack cover plate flame-retardant PP material has excellent mechanical performance, flame retardance, thermal stability, dimensional stability and antistatic performance, is light in weight, and has wide application prospects in the fields of new energy automobiles, energy storage systems, consumer electronics, aerospace and industrial equipment.

The invention relates to the technical field of materials, and discloses a DAF film for functional chip packaging and a manufacturing process thereof.The DAF film is manufactured by taking epoxy resin as a base material, mixing the epoxy resin with auxiliary materials such as a modified boron nitride additive and then conducting a curing process, firstly, a reaction type macromolecular antioxidant is prepared in a polycondensation mode, and then the DAF film is prepared through a curing process; the reaction type macromolecular antioxidant structurally contains a large number of hindered phenol antioxidant groups and also contains a large number of hydroxyl functional groups generated by ring-opening polycondensation, so that the reaction type macromolecular antioxidant can participate in the reaction in the curing process of epoxy resin, and the reaction type macromolecular antioxidant can be used for preparing the modified boron nitride additive. The hexagonal boron nitride can be uniformly dispersed in the DAF film, and the DAF film is endowed with good heat conductivity and high temperature oxidation resistance by utilizing the unique heat conductivity of the boron nitride and the antioxidant effect of the macromolecular antioxidant.

The invention discloses an expandable rubber cable pipe plugging device and a preparation method thereof.The expandable rubber cable pipe plugging device is prepared from, by weight, 100 parts of EPDM rubber, 0.5-1.0 part of graphene, 0.2 part of silane coupling agent KH550, 10 parts of sodium carboxymethyl cellulose, 15 parts of sodium acrylate-acrylamide copolymer, 5 parts of polyvinyl alcohol, 8 parts of bentonite, 5 parts of expandable graphite and 3 parts of 4, 4 '-oxybisbenzenesulfonyl hydrazide foaming agent. The anti-aging coating is prepared from the following components in parts by weight: 1 part of zinc stearate, 2.5 parts of peroxide DCP, 2 parts of assistant crosslinker TAIC, 5 parts of zinc oxide, 1 part of stearic acid, 30 parts of fumed silica, 5 parts of modified nano montmorillonite, 20 parts of light calcium carbonate, 1.5 parts of anti-aging agent TMQ, 1 part of anti-aging agent 6PPD, 0.5 part of hindered phenol antioxidant 1076, 2 parts of UV absorbent UV-3292, 8 parts of naphthenic oil, 10 parts of microcapsules and 0.5 part of boron trifluoride diethyl etherate complex catalyst.

A stabilized polymer composition comprising an organic polymeric material to be stabilized and a stabilizer composition comprising: at least one inorganic UV blocker, at least on hindered amine light stabilizer compounds, at least on hindered phenol antioxidant compound, at least one phosphite or phosphonite compound, and at least one thioester, wherein the stabilizer composition provides effective ultraviolet (UV) light stability, thermal stability and gas fade resistance to the stabilized polymer even when a hindered hydroxybenzoate, an organic UV absorber, an acid scavenger and / or a dialkylhydroxylamine are not present.

The invention relates to a cable sheath material, and particularly discloses a weather-proof low-smoke halogen-free flame-retardant polyolefin cable sheath material and a preparation method thereof. The cable sheath material is prepared from 30 to 45 parts of low-density polyethylene, 10 to 30 parts of high-impact homo-polypropylene, 15 to 30 parts of graft modified flexibilizer, 30 to 50 parts of main flame retardant, 1 to 5 parts of coupling agent, 10 to 30 parts of phosphorus-nitrogen synergistic flame retardant, 4 to 10 parts of efficient smoke suppressant, 0.2 to 0.8 part of hindered phenol main antioxidant, 0.4 to 1.2 parts of thioester auxiliary antioxidant, 0.4 to 1.0 part of hindered amine light stabilizer, 0.5 to 1.5 parts of ultraviolet light absorber and 2.5 to 2.5 parts of weather resistance enhancer. 5.0 parts of a lubricant, 0.5 to 2.0 parts of a lubricant, and 0.1 to 0.8 part of an anti-copper agent. The mechanical property, the electrical insulation property and the weather resistance of the sheath material are effectively improved, an efficient synergistic flame retardant effect can be obtained, the flame retardant property is excellent, and a finished product can obtain excellent weather resistance, low-smoke zero-halogen property, flame retardant property, mechanical property, electrical insulation property and the like.