287 results about "Hindered phenol" patented technology

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 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 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 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 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 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.

The invention relates to the field of automobile oil-water transmission systems, in particular to an anti-aging and anti-oxidation oil-water transmission pipe for an automobile and a preparation method of the anti-aging and anti-oxidation oil-water transmission pipe, and aims to solve the problems that an existing oil-water transmission pipe is poor in anti-aging and anti-oxidation performance and anti-corrosion performance, so that the oil-water transmission pipe is often aged, oxidized and corroded; and the performance of the oil-water transmission pipe is reduced. According to the oil-water transmission pipe, the multi-hindered phenol compound and the multi-fluorine compound are used as additives, so that the aging oxidation resistance and the oil corrosion resistance of the oil-water transmission pipe are remarkably enhanced, the aging and corrosion of materials can be effectively prevented, and the service life of the oil-water transmission pipe is greatly prolonged; the maintenance cost and the replacement frequency caused by aging and corrosion of the oil-water transmission pipe are reduced, so that the long-term stable operation of the oil-water transmission system is ensured.

The invention relates to a hydroxyl-terminated hyperbranched polyester modified hindered phenol composite material and a butyl rubber damping material prepared from the hydroxyl-terminated hyperbranched polyester modified hindered phenol composite material. The hydroxyl-terminated hyperbranched polyester modified hindered phenol composite material is introduced into a butyl rubber system as a functional additive, on one hand, hydrogen-bond interaction can be formed between the hindered phenol composite material and a polar side group in a rubber matrix, when external stress or vibration is applied, hydrogen bonds in the material are weakened or broken, and new hydrogen bonds are continuously formed, so that the service life of the material is prolonged; in the process, a large amount of energy of a system is consumed, mechanical energy is converted into internal energy, and the damping performance of the composite material is improved; on the other hand, the glass transition temperature of the rubber material can be changed, so that the effect that the optimal damping use temperature range is adjustable is achieved, and the problem that use conditions are limited due to the fact that the glass transition temperature of butyl rubber is low is solved; and meanwhile, the wider damping temperature range and the better stripping performance also conform to the diversification and functionalization development trend of the current non-vulcanized rubber damping material.

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 discloses a preparation method and application of modified hyperbranched polyurethane for track traffic field finish paint, and comprises the following raw materials: 2,2-dimethylol propionic acid, dicyclohexyl methane-4,4'-diisocyanate, modified chain extender and catalyst. The modified hyperbranched polyurethane containing double benzimidazole structures and curcumin and the phosphorus-nitrogen six-membered ring functional agent A containing a large number of hindered phenol structures are used in the preparation of the track traffic finish paint, so that the finish paint has excellent ultraviolet aging resistance, heat aging resistance and mechanical properties, and also has the effect of flame retardation.

The invention provides a resin composition having excellent impact resistance, fluidity, heat resistance, and good appearance of a molded article, and having a high effect of suppressing tape peeling from the surface of a molded article. The invention is a resin composition, containing: 0.5 to 10 parts by weight of (C) an acrylic block copolymer (component C); 0.01 to 3.0 parts by weight of (D) a phosphorus antioxidant (component D); and 0.01 to 3.0 parts by weight of (E) a hindered phenol antioxidant (component E) relative to 100 parts by weight of a resin component composed of 45 to 90 parts by weight of (A) a polycarbonate resin (component A) and 10 to 55 parts by weight of (B) a copolymer obtained by polymerizing an aromatic vinyl monomer and a vinyl cyanide monomer (component B).

The invention relates to the technical field of high-voltage cables, in particular to a crosslinked polyethylene insulated high-voltage direct-current cable, which is characterized in that an insulating layer contains a crosslinked polyethylene base material, a composite modifier, an antioxidant compound system, a nano nucleating agent, a tracking-resistant agent, a compatilizer and a smoke suppressant, the composite modifier is prepared by compounding an ethylene-vinyl acetate copolymer and a methyl methacrylate-butadiene-styrene copolymer, the antioxidant is prepared by compounding hindered phenol and phosphite ester, the nano nucleating agent is prepared from silane coupling agent KH-550 modified talcum powder and calcium carbonate, the tracking-resistant agent is prepared from melamine cyanurate and stearic acid activated magnesium hydroxide, and the lubricant is prepared from a lubricant and a lubricant. The compatilizer is maleic anhydride grafted polyethylene, and the smoke suppressant is compounded by ammonium molybdate and tin oxide. The components synergistically improve the flexibility, aging resistance and dielectric property of the insulating layer, the tracking resistance and smoke suppression are balanced, and the preparation process solves the problem of additive agglomeration, accurately controls the crosslinking degree, reduces the internal stress and improves the performance uniformity.

The application relates to the technical field of inks, and discloses a long-acting coagulation ink formula, a preparation method and application, the ink comprising a water-based polyurethane emulsion, pigments, a defoaming agent and a dispersing agent; the water-based polyurethane emulsion formula is polytetrahydrofuran glycol, glycerol monooleate, isophorone diisocyanate, a chain extender and a hindered phenol crosslinking agent; the hindered phenol crosslinking agent is prepared and introduced into a molecular chain segment of the water-based polyurethane binder, linear water-based polyurethane macromolecules are linked in the form of chemical bonds, a crosslinked network structure is formed, molecular chain movement is limited, aggregation is not easy, gel during storage can be reduced, and the hindered phenol is linked to the polyurethane molecular chain through chemical bonds, free radicals are captured by the hindered phenol groups, and the phenomenon of ink skinning, gelation and coagulation of the polyurethane ink caused by oxidation during storage and use is avoided; the ink has excellent stability, adhesion, skinning resistance, rubbing resistance and alcohol resistance.

The invention belongs to the technical field of optical adhesives, and discloses an upper and lower glass substrate bonding sealant and application thereof, the sealant comprises the following raw materials: urethane acrylate, isobornyl acrylate, a photoinitiator, a cross-linking agent, a multifunctional stabilizer, modified nano silicon dioxide and a polymerization inhibitor; the multifunctional stabilizer is a triazine derivative containing a hindered phenol antioxidant structure, a benzotriazole ultraviolet light absorber structure and a long-chain alkyl structure; the modified nano silicon dioxide is core-shell nanoparticles formed by in-situ growth of nano cerium dioxide on the surface of mesoporous silicon dioxide loaded with a hindered amine light stabilizer; the liquid optical sealant is prepared from polyurethane acrylate and isobornyl acrylate, and the multifunctional stabilizer and the modified nano silicon dioxide are compounded, so that the liquid optical sealant has optical transparency, bonding sealing performance, weather-resistant stability and mechanical enhancement, and is adaptive to the fitting scene of upper and lower glass substrates.

The application discloses a silane-modified antioxidant with anti-precipitation and anti-migration, a preparation method and application thereof, and belongs to the technical field of polyethylene pipe materials. The antioxidant is obtained by optimizing and modifying a composite antioxidant, and three different types of antioxidants, namely, hindered phenol, aromatic amine and tocopherol, are chemically bonded to a molecular skeleton to form a composite and multi-mechanism antioxidant active end, so that the antioxidant has the advantages of excellent migration resistance and precipitation resistance, and the durability of the antioxidant is ensured. In addition, the modified antioxidant is applied to the preparation of a silane cross-linked polyethylene pipe material, has better compatibility, and is firmly fixed in a polymer network through covalent bond anchoring, so that the antioxidant molecule provides stable, durable and reliable antioxidant protection for the pipe material, the service life of the pipe material is greatly prolonged, and the total cost of replacement and maintenance is reduced.

The application relates to the technical field of acrylic resins, in particular to a high-transparency acrylic resin composition, a preparation process thereof and application of the high-transparency acrylic resin composition to photovoltaics. The high-transparency acrylic resin composition comprises a glycidyl acrylic resin, a curing agent, a plasticizer and a leveling agent, wherein the curing agent is prepared by the following method: firstly, porous nanoparticles are prepared by adopting a sol-gel method with a template agent; secondly, the porous nanoparticles are modified by carboxylation; and finally, the carboxyl-modified porous nanoparticles are grafted with a polyphenol type hindered phenolic antioxidant. In addition, a polysiloxane with a fatty ring structure and an epoxy group is introduced into the glycidyl acrylic resin. The above acrylic resin composition is not only light in quality, has high transparency, but also has good aging resistance, and is an excellent choice as a photovoltaic module packaging material.

The invention belongs to the technical field of semiconductor aluminum oxide coatings, and relates to a low-temperature curing high-temperature-resistant insulating hole sealing agent which is specifically prepared from the following components in parts by mass: 60-80 parts of epoxy resin, 1-5 parts of filler, 5-10 parts of solvent, 10-20 parts of curing agent and 1-5 parts of hindered phenol antioxidant. The high-temperature-resistant insulating hole sealing agent overcomes the problem that an existing hole sealing agent can be cured only under high-temperature adjustment, and in practical application, the hole sealing agent can be cured at low temperature, so that a coating is more compact and has good insulating performance, the resistance is improved, and the coating is prevented from being broken down in the using process of a product.

The invention belongs to the technical field of high polymer materials, and provides a modified PEEK material with good processing stability and a preparation method thereof, the modified PEEK material comprises the following raw materials by weight: 90-100 parts of polyether-ether-ketone, 8-15 parts of modified carbon nanotubes, 2.5-5 parts of modified titanium dioxide, 0.5-3.0 parts of a processing aid, 0.2-0.6 part of a hindered phenol antioxidant, and 0.1-0.3 part of a phosphite antioxidant. The preparation method comprises the following steps: step 1, drying PEEK, modified carbon nanotubes and modified titanium dioxide; step 2, mixing the dried PEEK, modified carbon nanotubes, modified titanium dioxide, a processing aid, a hindered phenol antioxidant and a phosphite antioxidant in a high-speed mixer to obtain a premix; and step 3, adding the premix into a twin-screw extruder, and carrying out melt blending, extrusion and granulation to obtain the modified PEEK material.

The application is a kind of low water absorption and high heat distortion temperature copolymer nylon resin, which comprises the following components in weight percentage: 98% to 99.8% of nylon salt; 0.1% to 1% of end-capping agent; and 0.1% to 1% of hindered phenol monomer. The nylon salt comprises 60% to 80% of nylon 66 salt and 20% to 40% of nylon 6T salt. The end-capping agent is glycidyl ether containing silane and / or siloxane structure. The hindered phenol monomer comprises one or more of N,N'-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexanediamine, 4,4'-butylidenebis(6-tert-butyl-3-methylphenol), and tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane. The product of the application can meet the production requirements of differentiated copolymer nylon and has universal applicability. Without adding filling materials such as fiber, kaolin, talc, etc., the water absorption can be significantly reduced, the melting point and heat distortion temperature can be increased, and the inherent properties of nylon 66 resin are not affected.

The application discloses a methyl methacrylate copolymer and a preparation method and application thereof. The methyl methacrylate copolymer is mainly obtained by polymerization of 20-90 mass parts of methyl methacrylate monomer a), 10-80 mass parts of aromatic unsaturated hydrocarbon monomer b) and 0-20 mass parts of other vinyl monomer c). By adding phosphite antioxidant before resin devolatilization and adding hindered phenolic antioxidant in the resin extrusion granulation stage, the resin has good optical performance and aging resistance.

The invention discloses high-temperature-resistant coated paper and a preparation method thereof, and belongs to the technical field of coated paper. The PE coated paper is prepared from raw materials including PBAT, PLA, a chain extender, modified montmorillonite, polyvinyl acetate, a slipping agent, an antistatic agent and a hindered phenol antioxidant through the steps of melt blending, extrusion granulation, PE coated compounding and the like. Wherein the modified montmorillonite is prepared by reacting specific phenolic acid with tertiary amine in a mixed solvent to generate a grafted compound and compounding the grafted compound with montmorillonite. Compared with the prior art, the coated paper has the advantages of good thermal stability, low wear-resistant loss, simple preparation process and easily available raw materials, is suitable for high-temperature or high-frequency friction use scenes, and has a good application prospect.

There is provided a resin composition including a resin having an alkyl group on a side chain of a molecule thereof, an inorganic filler and an antioxidant, wherein the antioxidant is either of a hydrazide-based antioxidant or a combination of a hindered phenol-based antioxidant and an organic metal chelate-based antioxidant.

The invention discloses a microcellular foamed polypropylene interior material with excellent scratch resistance and a preparation process thereof, and relates to the technical field of vehicle door interior panel materials. The polypropylene composite material comprises the following components in parts by weight: 100 parts of polypropylene, 8-12 parts of a maleic anhydride grafted polypropylene-nano silicon dioxide composite modifier, 5-15 parts of a polyolefin elastomer, 3-10 parts of a supercritical carbon dioxide foaming agent, 0.5-1.5 parts of a hindered phenol antioxidant, 0.3-0.8 part of a light stabilizer and 0.2-0.6 part of a lubricating dispersant. The problems that in the prior art, a microcellular foaming polypropylene interior decoration material is poor in scratch resistance, uneven in foam structure, low in preparation process efficiency and the like are effectively solved, synergistic improvement of the scratch resistance, the mechanical property and the foaming property of the material is achieved, meanwhile, the production efficiency is improved, and the production cost is reduced.

The utility model discloses a hindered phenol light stabilizer quantitative output assembly, and relates to the technical field of hindered phenol light stabilizer weighing, the hindered phenol light stabilizer quantitative output assembly comprises a workbench, the top of the workbench is provided with a weighing unit, the weighing unit comprises a bearing plate, the bearing plate is installed on the top of the workbench, and the top of the workbench is provided with a light source. And a storage cylinder is fixedly mounted at the top of the bearing plate. During use, when the X-value hindered phenol light stabilizer needs to be quantitatively output, the hindered phenol light stabilizer is placed in the storage cylinder, the overall weight of the storage cylinder and the hindered phenol light stabilizer is detected to be A through the weighing unit, when quantitative output needs to be conducted, the driving motor is started to drive the conveying shaft and the discharging auger to rotate synchronously, and when the discharging auger rotates, the X-value hindered phenol light stabilizer is output. And when the bearing unit detects that the weight of the storage cylinder is reduced to a value B, A-B is equal to X at the moment, and the driving motor stops working, so that the quantitative output function is realized.

The invention provides an asphalt pavement surface repairing protective agent and a preparation method thereof. The asphalt pavement surface repair protective agent is prepared from the following raw materials: petroleum asphalt, hydroxy acrylic resin, an organosilicon material, a compatilizer and an additive, wherein the compatilizer comprises an aromatic compound and hindered phenol; the organic silicon material is selected from phenyl silicone resin or phenyl silicone rubber; the total mass of the raw materials is 100%, and in the raw materials, the mass content of the petroleum asphalt is 40%-55%, the mass content of the hydroxy acrylic resin is 8%-20%, the mass content of the organosilicon material is 6%-14%, and the mass content of the compatilizer is 15%-25%. According to the asphalt pavement surface repairing protective agent, the petroleum asphalt is adopted as a raw material, so that the characteristic that the adhesive force between the petroleum asphalt and an asphalt pavement is obviously high is utilized, and meanwhile, relatively good flowability and film-forming property can also be taken into account.

The application discloses a kind of two-component high-performance peelable protective coatings, by weight parts, including the following raw materials: 80-100 parts A component and 20-30 parts B component, A component includes: hyperbranched resin, acrylic dispersion 1, acrylic dispersion 2, impact resistance functional agent, leveling agent etc., B component is isocyanate curing agent, containing diphenyl, unsaturated long-chain olefin structure impact resistance functional agent is involved in the preparation of coating, improve the mechanical properties of coating and matrix structure strength, can synergistically improve the water resistance of matrix with anti-aging agent Water resistance, while anti-aging agent contains hindered phenol structure can synergistically give coating matrix anti-aging effect, improve the anti-aging performance of matrix.

The invention discloses a preparation method of a high-temperature durable epoxy resin coating, 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 a biodegradable anti-aging agent as well as a preparation method and application thereof, and belongs to the field of biodegradable high polymer materials. Dibasic acid, dihydric alcohol and an acid compound containing a hindered phenol structure or an ester derivative of the acid compound are used as raw materials, esterification and condensation polymerization are performed, and then esterification or ester exchange reaction is performed to prepare the macromolecular anti-aging agent, so that high dispersity and migration resistance are realized; the anti-aging agent and the biodegradable resin are mixed and directly subjected to blow molding, film forming, extrusion casting and other melt forming, the hot working process is simplified, and the loss of material mechanics and aging resistance is reduced; the phenolic hydroxyl group can capture free radicals, so that the aging resistance of the biodegradable material is remarkably improved, and the service life of the material is prolonged. The prepared anti-aging biodegradable material can be applied to thin film products, and is particularly suitable for high-performance degradable mulching films and environment-friendly packaging materials.

The preparation method of the yellowing-resistant nylon particle composite material comprises the following steps: S1, weighing 100 parts by weight of nylon, and adding the nylon into a reaction kettle; s2, adding 2, 2, 2-trifluoroethanol as a solvent into the reaction kettle, and stirring to form a uniform nylon dissolving solution; s3, conveying the nylon dissolving solution into a spray dryer through a peristaltic pump, and performing atomization, drying and powder collection under the protection of nitrogen; s4, placing the powder in a vacuum drying oven, and drying at 25 DEG C for 3 hours to obtain nylon powder; s5, mixing the nylon powder with the following raw materials in parts by weight: 1-2 parts of an ultraviolet light absorber, 1-2 parts of a hindered phenol antioxidant, 2-4 parts of adipic acid, 0.5-1.5 parts of sebacic acid, 0.1-0.5 part of dicumyl peroxide and 8-10 parts of silane coupling agent modified mica powder; and S6, carrying out melt blending on the mixture obtained in the step S5 in a twin-screw extruder to obtain the yellowing-resistant nylon particle composite material.

The invention belongs to the field of flame-retardant PET (Polyethylene Terephthalate) products, and particularly relates to a PET master batch for preparing a low-phosphorus flame-retardant PET material and a preparation method of the PET master batch. The PET master batch for preparing the low-phosphorus flame-retardant PET material is prepared from PET, a polyphosphate flame retardant, a phosphite antioxidant and a hindered phenol antioxidant in a weight part ratio of (55-65): (25-40): (4-16): (0.1-0.5). The master batch is prepared through PET and antioxidant pretreatment, high-speed mixer batching and a twin-screw extrusion process, and has the advantages that the phosphorus content is greatly reduced, and excellent flame retardance is kept.