392 results about "Hindered phenol" patented technology

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 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 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 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 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 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 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 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.

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 belongs to the technical field of protective films, and discloses a photosensitive dry film protective film and a preparation method thereof. The photosensitive dry film protection film comprises an anti-sticking layer, a middle layer and a release layer, the anti-sticking layer is made of first low-density polyethylene, and the haze of the first low-density polyethylene is 10%-30%; the release layer comprises first linear low-density polyethylene and a release agent; the middle layer comprises second low-density polyethylene, second linear low-density polyethylene, nano silicon dioxide and an antioxidant, the antioxidant is obtained by compounding a hindered phenol antioxidant and a phosphite antioxidant, and the content of the antioxidant is smaller than or equal to 200 ppm. Common polyethylene is used as a main raw material, and nano silicon dioxide is used as a nucleating agent to realize crystal point control; the content of the antioxidant is strictly controlled, the influence of the antioxidant on the photosensitive dry film is reduced, and long-acting oxidation resistance is achieved through a specific hindered phenol antioxidant and phosphite ester antioxidant compound system under the low-content condition.

The invention discloses a high-performance environment-friendly coating for a building external wall and a preparation method thereof, and belongs to the technical field of coatings. The coating is prepared from the following raw materials: 70 to 80 parts of styrene-acrylic emulsion, 30 to 40 parts of water, 15 to 25 parts of hollow glass beads, 5 to 10 parts of a coalescing agent, 5 to 10 parts of modified titanium dioxide, 5 to 10 parts of ground calcium carbonate, 1 to 3 parts of a thickening agent, 0.8 to 2 parts of an auxiliary agent, 0.5 to 1 part of a dispersing agent, 0.5 to 1 part of a defoaming agent, 0.5 to 1 part of a wetting agent, 0.5 to 1 part of a pH regulator and 0.04 to 0.06 part of an initiator. The auxiliary agent containing a thiazole structure and a hindered phenol structure contains ester groups, hydroxyl groups, benzene rings and the like, chemical effects exist among the auxiliary agent, the benzo emulsion and the modified titanium dioxide, and the auxiliary agent is highly dispersed and stably exists in the coating under the action of the dispersing agent, so that the coating is endowed with lasting and efficient antibacterial and anti-aging effects; the coating also has excellent adhesive force, heat insulation and heat preservation effects and impact resistance.

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 invention belongs to the technical field of lubricating oil, and particularly relates to environment-friendly biodegradable lubricating oil for a hydraulic retarder and a preparation method of the environment-friendly biodegradable lubricating oil. The environment-friendly biodegradable lubricating oil for the hydraulic retarder is prepared from the following components in parts by mass: 80 to 90 parts of base oil, 1 to 3 parts of a cleaning agent, 1 to 3 parts of a dispersing agent, 1 to 2 parts of a viscosity index improver, 0.5 to 2 parts of an anti-wear agent, 0.3 to 1.5 parts of an antioxidant, 0.1 to 0.5 part of an anti-foaming agent and 0.1 to 0.3 part of a pour point depressant, the antioxidant comprises hindered phenolic ester, aromatic amine and zinc thiophosphate in a mass ratio of (3-6): (2-5): 1. The environment-friendly biodegradable lubricating oil for the hydraulic retarder, provided by the invention, is biodegradable, and has excellent high-temperature resistance, oxidation resistance and low-temperature resistance and longer oil change period.

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 relates to a polyvinyl chloride plastic and a preparation method thereof, and relates to the technical field of polyvinyl chloride plastics. The polyvinyl chloride plastic is prepared from 65 to 75 parts of polyvinyl chloride resin A, 25 to 35 parts of polyvinyl chloride resin B, 15 to 20 parts of hyperbranched polyesteramide, 3 to 5 parts of modified SiO2 aerogel, 2 to 3 parts of a cross-linking agent, 0.5 to 1 part of a rare earth stabilizer, 0.3 to 0.5 part of a hindered phenol antioxidant and 0.8 to 1.2 parts of calcium stearate. The polymerization degree DP of the polyvinyl chloride resin A is 700 to 900, and the polymerization degree DP of the polyvinyl chloride resin B is 2400 to 2600. The polyvinyl chloride plastic provided by the invention has relatively excellent low-temperature toughness and good weather resistance, and the embrittlement risk of the polyvinyl chloride plastic under a harsh low-temperature condition can be effectively avoided.

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.