67 results about "Dioctyl terephthalate" patented technology

The invention belongs to the technical field of new materials of conveying belts, and discloses a graphene modified whole-core flame-retardant conveying belt for a coal mine and a preparation method of the graphene modified whole-core flame-retardant conveying belt. Comprising mixed rubber and a polyester fabric located in mixed liquid, and the mixed rubber is prepared from, by weight, 100-120 parts of chloroprene rubber, 20-30 parts of hydrogenated nitrile rubber, 5-10 parts of graphene composite particles, 1-3 parts of magnesium hydroxide and 1-3 parts of dioctyl terephthalate. The conveyor belt prepared by the invention not only has relatively high mechanical strength and tear resistance, but also has good flame retardant property.

The invention discloses a cold-resistant and anti-freezing cable and a preparation method thereof, and relates to the technical field of cables. The cold-resistant and anti-freezing cable sequentially comprises a sheath layer, an insulating layer and a conductive core layer from outside to inside, the sheath layer is prepared from a sheath material, and the sheath material comprises polyvinyl chloride resin, dioctyl terephthalate, modified polyurethane, epoxidized soybean oil, aluminum hydroxide, magnesium hydroxide, a calcium-zinc stabilizer and modified halloysite. The sheath material prepared by the invention has good mechanical properties, antibacterial properties and anti-aging properties, and is suitable for cold-resistant and anti-freezing cables.

The invention relates to the technical field of cables, in particular to an environment-friendly flame-retardant antioxidant chlorinated polyvinyl chloride cable and a preparation method thereof, and the environment-friendly flame-retardant antioxidant chlorinated polyvinyl chloride cable comprises the following raw materials: chlorinated polyvinyl chloride, dioctyl terephthalate, nano aluminum hydroxide, a composite flame retardant, a calcium-zinc stabilizer, epoxidized soybean oil and nano clay. The composite flame retardant forms an organic-inorganic synergistic core-shell structure on a micro-nano scale, hexaphenoxy cyclotriphosphazene provides a phosphorus source flame-retardant function, and polyborosilazane forms a boron-silicon-nitrogen ceramic network after heat treatment, so that the carbon layer stability and thermal oxidation resistance of the material are effectively improved; meanwhile, the modified silicon dioxide is used as an inorganic skeleton reinforcing phase, so that the dispersity and the interface bonding performance of the flame retardant in a CPVC matrix are improved; through the synergistic effect, the flame retardant efficiency, thermal stability and mechanical strength of the cable material are remarkably improved, and smoke release and toxicity are reduced.

The invention discloses a double-layer lvt soft foaming floor and a production process, and relates to the technical field of floors, the double-layer lvt soft foaming floor comprises an LVT double-layer structure, the LVT double-layer structure is composed of an upper-layer LVT structure and a lower-layer LVT foaming structure, and the upper-layer LVT structure is prepared from polyvinyl chloride resin, dioctyl terephthalate, stone powder, an outer lubricating lubricant, an inner lubricating lubricant and a heat stabilizer; the LVT foaming structure of the lower layer is made of polyvinyl chloride resin, dioctyl terephthalate, stone powder, LVT ground powder return materials, foaming agents, foaming regulators, outer lubricating lubricants and inner lubricating lubricants, the floor internally comprises an LVT double-layer structure through extrusion foaming, the upper layer is LVT, the lower layer is LVT foaming, and the hardness of the upper layer can be achieved while the foot feeling is guaranteed.

The invention belongs to the technical field of wastewater treatment equipment, and particularly relates to wastewater extraction equipment for producing dioctyl terephthalate, which comprises a main body, and the main body is internally divided into a flocculation zone, an anaerobic zone, an aerobic zone and a settling zone; sludge discharge plates are mounted on the bottom surfaces of the flocculation area and the sedimentation area, the upper surfaces of the sludge discharge plates are obliquely arranged, and cavities are formed in the sludge discharge plates and connected with air inlet control pipes; a mounting baffle is mounted in the flocculation area, magnetic blocks are symmetrically mounted on the mounting baffle, and a movable net is slidably mounted between the magnetic blocks; the lower end of the mounting baffle is not in contact with the bottom of the flocculation zone; the device is simple in structure, mixed wastewater is filtered and settled for multiple times, solid impurities in the wastewater are fully discharged, meanwhile, water flow is used for impacting and stirring from bottom to top, activated sludge is kept in a suspended state, uniformity and fluidity are improved, and the wastewater recycling effect is guaranteed to be improved.

The invention belongs to the technical field of carboxylic ester preparation, and particularly relates to a preparation method of dioctyl terephthalate, which comprises the following steps: under the catalysis of acid, modifying mesoporous silica by using OTES and a carbazole silane solution to obtain modified silica; under the protection of inert atmosphere, uniformly mixing TBT and methylbenzene, adding absolute ethyl alcohol for reaction, adding modified silicon dioxide for dispersion, adding water-containing mixed liquid for reaction, and aging, filtering, washing and drying to obtain the titanium-based catalyst. The preparation method comprises the following steps: uniformly mixing PTA, 2-ethylhexanol and a titanium-based catalyst, carrying out heating reaction, filtering, and carrying out reduced pressure distillation to obtain the dioctyl terephthalate. The method can inhibit hydrolysis failure of a titanium active center in the catalytic esterification reaction process, and improves the yield and purity of dioctyl terephthalate.

This application provides a flame-retardant and toughened cable material, prepared from the following components in parts by weight: 85-100 parts PVC resin, 15-20 parts dioctyl phthalate, 10-15 parts chlorinated paraffin, 10-15 parts dioctyl terephthalate, 40-50 parts heavy calcium carbonate, 5 parts stabilizer, 2-3 parts PE wax, 1-2 parts stearic acid, and 20-30 parts flame-retardant particles. The flame-retardant particles are composite microspheres formed by loading flame retardants onto nano-silica aerogel and grafting POSS onto its surface. Nano-silica aerogel has a higher temperature resistance limit, and its unique three-dimensional porous network structure can absorb heat and restrict oxygen diffusion. It can also load flame retardants, resulting in a more uniform distribution of the flame retardant. POSS acts as a bridge between the nano-silica aerogel and PVC resin, improving the compatibility and bonding strength between the flame-retardant particles and PVC resin, reducing stress concentration, and improving toughness, thus achieving simultaneous improvement in flame retardancy and toughness.

The invention provides a polyvinyl chloride alloy material and a preparation method thereof. The polyvinyl chloride alloy material is prepared from the following raw materials in parts by weight: 30 to 65 parts of polyvinyl chloride resin, 5 to 15 parts of polyether type thermoplastic polyurethane elastomer, 20 to 50 parts of dioctyl terephthalate, 5 to 20 parts of surface modified nano calcium powder and 5 to 20 parts of phosphorus-nitrogen composite flame retardant. The polyvinyl chloride alloy material has relatively high elasticity, wear resistance and swing resistance, also has relatively good flame retardant property and tensile strength, and is applicable to materials for manufacturing high-resilience aircraft connectors and other products needing high elasticity and swing resistance.

The invention discloses a sealant with bacteriostatic and mildew-proof functions for a metal bottle cap and a preparation method of the sealant, and belongs to the technical field of sealant preparation. The sealant provided by the invention is prepared from the following raw material components in percentage by mass: 40.0 to 55.0 percent of an auxiliary agent A, 0.5 to 3.0 percent of an auxiliary agent B, 2.0 to 4.0 percent of zinc stearate, 1.0 to 3.0 percent of titanium dioxide, 1.0 to 5.0 percent of ground calcium carbonate, 0.5 to 2.5 percent of an anti-blocking agent and 39.0 to 55.0 percent of polyvinyl chloride resin, the auxiliary agent A is prepared from at least two of dioctyl terephthalate, epoxidized soybean oil, trimellitic anhydride and cyclohexane 1, 2-diisononyl diformate; the auxiliary agent B is obtained by mixing and grinding zinc oxide, metal silver, zirconium phosphate, zinc pyrithione and coconut oil fatty acid diacetamide. According to the invention, the sealant is prepared by compounding multi-component food-grade antibacterial mildew-proof active components, so that the prepared sealant is ensured to reach the first-grade standard of ASTM G21-15 Determination of Antifungal Factor of Synthetic High Polymer Materials, meanwhile, the risk that the sealant is mildewed when being used in canned food is reduced, and the quality of the product is improved.

The invention relates to the technical field of recycled asphalt mixtures, and particularly discloses a recycled asphalt mixture with good durability and a preparation method thereof. The invention discloses a recycled asphalt mixture with good durability. The recycled asphalt mixture is prepared from 60-80 parts of a waste asphalt mixture reclaimed material, 4-7 parts of new asphalt, 15-18 parts of a new aggregate, 2-5 parts of fibers, 3-7 parts of a regenerant and 2-5 parts of filler, wherein the regenerant is prepared from aromatic hydrocarbon oil, triethylene glycol di-2-ethylhexoate, 2-ethylhexyl diphenyl phosphate, dioctyl terephthalate, epoxidized soybean oil, dipropylene glycol methyl ether acetate, polymethylene polyphenyl polyisocyanate, oleic acid hydroxyethyl imidazoline, 0 erucyl amide and barium petroleum sulfonate. The recycled asphalt mixture provided by the invention can effectively resist generation of diseases such as ruts and cracks, the service life of a road is remarkably prolonged, and the maintenance cost of the road is reduced.

The present application relates to the technical field of underwater curable sealant, in particular to an underwater curable polyurethane sealant and a preparation method thereof.An underwater curable polyurethane sealant comprises glue, dioctyl terephthalate, wetting dispersant, water removing agent, thixotropic agent, filler, magnesium fluoride, carbon black and ultraviolet absorber; wherein the glue comprises the following raw materials in mass fraction: polyoxyethyl polyoxypropyl glycerol ether, polypropylene glycol, bio-based polyol, isocyanate propyl triethoxy silane, diphenyl methane diisocyanate, drier, coupling agent, defoaming agent, diluent and latent curing agent.The underwater curable polyurethane sealant of the present application can not only be quickly cured underwater, but also can quickly form a stable bonding interface after being cured underwater, effectively resist the penetration of water molecules, thereby ensuring long-term sealing effect and structural stability.

The invention relates to the technical field of polyvinyl chloride materials, and discloses a lead and arsenic-free polyvinyl chloride sheath cable material and a preparation method thereof. The polyvinyl chloride sheathed cable material comprises the following raw material components in parts by weight: 100 parts of polyvinyl chloride resin powder, 40-45 parts of a plasticizer, 5-7 parts of a stabilizer, 10-15 parts of calcium carbonate, 10-15 parts of aluminum hydroxide, 2-4 parts of magnesium hydroxide, 0.5-2 parts of an anti-dripping agent and 0.2-1 part of a synergist, the stabilizer is folic acid modified Ca-Mg-Al-LDH (layered double hydroxide). The plasticizer is composed of dioctyl terephthalate and stearoyl chloride modified red phosphorus microcapsules. The prepared polyvinyl chloride sheathed cable material has good flame retardance and heat aging resistance.

This application relates to a tensile PVC film and its preparation method, comprising the following raw materials in parts by weight: 100-140 parts by weight of PVC resin, 35-55 parts by weight of dioctyl terephthalate, 3-8 parts by weight of dioctyl adipate, 3-6 parts by weight of zinc-calcium composite stabilizer, 4-6 parts by weight of β-hydroxyethyl acrylate / methylhexahydrophthalic anhydride modified epoxidized soybean oil, 15-25 parts by weight of hydrogenated ricinoleic acid modified nano-calcium carbonate, 8-12 parts by weight of heavy calcium carbonate, 3-5 parts by weight of titanium dioxide, and 0.01-0.03 parts by weight of colorant. This PVC film exhibits good tensile strength and elongation at break, with a longitudinal tensile strength >28.5 MPa, a transverse tensile strength >24 MPa, a longitudinal elongation at break >285%, and a transverse elongation at break >315%.

The invention relates to a full-continuous production process of dioctyl terephthalate, and belongs to the technical field of high-molecular compound synthesis processes. The invention discloses a full-continuous production process of dioctyl terephthalate, which comprises the following steps: by taking a three-stage gradient reaction device as an esterification tower, increasing the esterification rate by controlling gradient temperature and pressure, connecting an esterification separator to the top of the esterification tower, separating water vapor and alcohol vapor, cooling the vapor, and carrying out oil-water separation, and freezing and standing the separated octanol to flow back into the esterification tower, enabling the material reacted in the esterification tower to flow out from the bottom of the tower, introducing into a secondary distillation tower, carrying out reduced pressure distillation, cooling and dehydrating, and filtering to obtain a finished product.

The invention discloses a deadening felt based on microstructure improvement. The deadening felt is prepared from the following raw materials in parts by weight: 50-70 parts of polyvinyl chloride resin, 20-30 parts of dioctyl terephthalate, 10-20 parts of modified graphene, 20-30 parts of barite powder, 20-30 parts of coarse whiting, 3-8 parts of an anti-aging agent and 1-2 parts of carbon black. The added barite powder, modified graphene and other polymer materials are matched, a polymer and modified graphene mixture deadening felt structure with a honeycomb structure is formed through a forming process, and in addition, the SBA-16 mesoporous molecular sieve has the advantages that the pore diameter range is large, the stability is good, the pore channel shape is diversified (cylindrical, spherical or flat-plate-shaped), and the deadening effect is good. Due to the excellent characteristics, the SBA-16 mesoporous molecular sieve material is endowed with excellent sound absorption performance, so that the product is high in sound insulation quantity and has a very good sound insulation effect, and due to the addition of the anti-aging agent, the product has a very good anti-aging effect.

The invention discloses a light-weight high-strength fabricated building board which comprises the following raw materials in parts by weight: 100 parts of polyvinyl chloride, 10-20 parts of modified filler, 10-20 parts of dioctyl terephthalate, 10-20 parts of heat stabilizer, 10-20 parts of polyethylene wax and 10-20 parts of calcium stearate. 20-30 parts of a modified filler; 15 to 18 parts of dioctyl terephthalate; 3-4 parts of a heat stabilizer; 2-3 parts of polyethylene wax; and 0.2 to 0.4 part of calcium stearate. The building board prepared through the method has high strength and heat resistance, the durability of the board is improved, the stress damage rate in the assembling and using process is reduced, meanwhile, the weather resistance of the polyvinyl chloride board is optimized, and the building board is suitable for application occasions with the relatively high temperature.

The utility model relates to the technical field of dioctyl terephthalate, in particular to a sampling device for detecting dioctyl terephthalate, which comprises a barrel, a support block and a pull rod, the support block is arranged at the lower end of the barrel, the pull rod is arranged at the upper end of the barrel and penetrates through the barrel, and an extraction structure is arranged in the barrel; the pull plate is pulled upwards, the liquid outlet is driven to pull out the one-way valve, the baffle is driven to move upwards, then the protective shell is rotated, the protective shell drives the rotating shaft to rotate, the protective shell on the other side is rotated to the position below the limiting plate, then the pull plate is loosened, and the liquid outlet is inserted into the one-way valve above the storage bin on the other side. According to the sampling device, a plurality of samples can be rapidly extracted, repeated sampling can be carried out, the sampling efficiency of the sampling device is improved, and the practicability of the sampling device is improved.

The utility model relates to the technical field of dioctyl terephthalate processing, in particular to an esterification kettle for dioctyl terephthalate processing, comprising a kettle body and a kettle cover: the upper end of the kettle body is provided with the kettle cover, the upper end side of the kettle cover is provided with a feed hopper, a pressurizing mechanism is provided inside the kettle cover, and a stirring mechanism is provided inside the kettle body; when the device is in use, the material can be stirred by the up and down movement of a piston rod at the lower end, and the pressure in the kettle body is increased when the piston rod is located at the upper end and then moves downward, so that the hotter gas in the upper layer moves downward under the push of the piston rod, and the gas in the kettle body flows out from the air exchange port along the gap between the kettle body and the piston rod, thereby avoiding the outflow of hot gas at the upper end of the device, and then effectively increasing the heat loss in the exhaust process.

The invention discloses a polyvinyl chloride modified material with high volume resistivity as well as a preparation method and application thereof, and belongs to the technical field of high polymer material preparation. The polyvinyl chloride modified material comprises the following raw materials: ethylene-process polyvinyl chloride resin powder, a polyester plasticizer, dioctyl terephthalate, epoxidized soybean oil, a polystyrene thermoplastic elastomer, a grafting material, argil, calcium powder master batch, a calcium-zinc stabilizer, PE wax and calcium stearate. By selecting ethylene-process PVC and a high-molecular-weight polyester plasticizer, high insulativity and durability of the material are guaranteed from a base body; secondly, the high-resistivity SBS resin is introduced to form the alloy, the compatibility of the high-resistivity SBS resin and PVC is improved through the grafting material, and the overall volume resistivity of the material is remarkably improved on the premise that the mechanical performance is guaranteed; and finally, by adding the argil and the calcium powder master batch, the insulating property of the material is further enhanced. The volume resistivity of the polyvinyl chloride modified material at 20 DEG C can reach 1 * 10 < 14 > omegam to 2 * 10 < 14 > omegam.

The utility model belongs to the technical field of separation devices, and particularly relates to a dioctyl terephthalate distillation system which comprises a distillation tower, a plurality of tower plates arranged in the distillation tower, a heat exchanger connected to the bottom of the distillation tower, a product storage tank connected to the top of the distillation tower and a stirring assembly arranged in the distillation tower, the stirring assembly comprises a stirring paddle and a spiral stirrer, the stirring paddle is located at the bottom of the distillation tower, a plurality of corrugated plates and a plurality of flow guide covers are arranged in the distillation tower, the corrugated plates are located above the flow guide covers, and the flow guide covers are located above the stirring paddle. According to the utility model, the space in the distillation tower is divided into three parts according to functions, and each section adopts a proper internal component, so that the optimization of the distillation effect is realized.

The application provides a chemical automatic distillation device and belongs to the technical field of crude dioctyl terephthalate. The chemical automatic distillation device comprises a tank body, a cavity separation net arranged in the tank body and used for separating a bottom cavity of the tank body into an inner cavity and an outer cavity, a pipe orifice separation net arranged at the bottom of the cavity separation net and inserted into the top end of a discharge pipe at the bottom of the tank body and used for separating an inner cavity of the discharge pipe from the outer cavity, a lower scale cleaning plate arranged between the side surface of the pipe orifice separation net and the bottom surface of the cavity separation net and in contact with the inner wall of the tank body, an upper scale cleaning plate slidingly arranged between the side surface of the cavity separation net and the top of the lower scale cleaning plate, and an intermittent rotation type guide rail assembly arranged on the side wall of the tank body. The application has the advantages of high heat transfer efficiency, anti-blocking, efficient scale and impurity cleaning.

This invention belongs to the technical field of polypropylene composite materials and discloses a high-impact, low-temperature resistant polypropylene composite material and its preparation method. The high-impact, low-temperature resistant polypropylene composite material of this invention, by weight, comprises 100 parts of PP resin, 20-30 parts of EPDM elastomer rubber, 10-20 parts of EDPM-g-MAH, 8-12 parts of carbon black, 4-6 parts of KH550 coupling agent, 2-5 parts of dioctyl terephthalate, 2-6 parts of lubricant, and 1-3 parts of compatibilizer. This material is prepared by grafting maleic anhydride end groups onto modified carbon black to generate a corresponding carbon black-EPDM-g-MAH elastomer. The carbon black-EPDM-g-MAH elastomer is then blended with EPDM to obtain a mixed toughening agent. This mixed toughening agent has good compatibility with the polypropylene matrix, improving the impact toughness of polypropylene while minimizing the decrease in its tensile strength and other mechanical properties. Simultaneously, the presence of carbon black promotes the formation of β-crystals in polypropylene, further enhancing the toughness and low-temperature resistance of the polypropylene material.

This invention discloses a polyvinyl chloride (PVC) sealing strip for refrigerators, its preparation method, and its application, belonging to the field of sealing material technology. The PVC sealing strip for refrigerators is mainly prepared from the following raw materials in parts by weight: 140-160 parts PVC, 4.2-4.8 parts stabilizer, 70-140 parts dioctyl terephthalate, 10-20 parts tributyl acetylacetonate, 20-40 parts epoxidized soybean oil, and 80-90 parts conductive filler. This sealing strip meets the requirements for flexible sealing in low-temperature environments and also possesses good electromagnetic shielding performance.

The invention discloses an environment-friendly formaldehyde-free waterproof and moistureproof stone-plastic composite wallboard and a preparation method thereof, and belongs to the technical field of composite wallboards. The PVC resin, the polypropylene resin, the cross-linked modified nano silicon dioxide, the glass fibers, the dioctyl terephthalate, the zinc borate and other components are subjected to the processes of mixing, extruding machine granulation, mold extrusion molding, cooling shaping, traction cutting and the like to prepare the stone-plastic composite wallboard. The comprehensive advantages of environmental protection, no formaldehyde, water resistance, moisture resistance, excellent mechanical property, high durability and the like are realized. Wherein the cross-linked modified nano silicon dioxide is prepared through a multi-step reaction, firstly, an intermediate containing a cross-linked structure and active sites is constructed through nucleophilic substitution and an ultraviolet light-initiated click reaction, then, the nano silicon dioxide is subjected to alkenylation modification, and finally, organic-inorganic chemical bonding is realized through a secondary click reaction. And through the synergistic effect of the cross-linked modified nano silicon dioxide and the glass fibers, the waterproof and moisture-proof performance, the mechanical property and the durability are remarkably improved.

The invention relates to the technical field of cables, and provides a corrosion-resistant cable and a preparation method thereof. A corrosion-resistant cable comprises a conductor layer and a sheath layer wrapping the conductor layer. The sheath layer is prepared from the following raw materials in parts by weight: 100-110 parts of PVC resin, 25-30 parts of modified hydrophobic diatomite / nano aluminum oxide filler, 8-12 parts of dioctyl terephthalate, 4-6 parts of a calcium-zinc composite stabilizer, 2-3 parts of a vulcanizing agent, 1-2 parts of an antioxidant, 2-3 parts of an ultraviolet light absorber, 0.8-1 part of polyethylene wax and 0.5-0.9 part of calcium stearate. According to the corrosion-resistant cable prepared in the invention, the waterproof and corrosion-resistant performance of the existing cable is improved.

The invention provides a polyvinyl chloride composition, a festoon optical cable containing the same and a preparation method of the festoon optical cable, and the polyvinyl chloride composition comprises the following components in parts by weight: 100 parts of polyvinyl chloride resin, 60-90 parts of a plasticizer, 5-10 parts of a charring agent and 30-50 parts of a flame retardant, the polymerization degree of the polyvinyl chloride resin is greater than or equal to 1700; the plasticizer comprises dioctyl terephthalate, and further comprises at least one of an ethylene-n-butyl acrylate-carbon monoxide terpolymer, diisooctyl sebacate or dioctyl adipate. The polyvinyl chloride composition is used for preparing an inner sheath of an optical cable, the low temperature resistance and flame retardant property of the optical cable can be improved, and meanwhile it is guaranteed that the optical cable has good flexibility and wear resistance.

This invention discloses a method for preparing dioctyl terephthalate (DOTP) from polyethylene terephthalate (PET), comprising: crushing, washing, and drying waste PET to obtain PET particles; depolymerizing the obtained PET particles in the presence of ethylene glycol and a composite depolymerization catalyst to obtain a depolymerization product; adding the obtained depolymerization product to octanol and a transesterification catalyst for transesterification reaction; after the reaction is completed, post-treatment yields dioctyl terephthalate; wherein the composite depolymerization catalyst is a mixture of zinc oxide and germanium dioxide; and the transesterification catalyst is a supported solid acid catalyst. This invention features high raw material utilization and good environmental performance, using waste PET as raw material to prepare DOTP via transesterification reaction, thus solving the pollution problem of waste PET; simultaneously, ethylene glycol, octanol, and the catalyst can be recycled during the reaction, reducing raw material consumption and wastewater.

The invention relates to the technical field of hot-melt pressure-sensitive adhesives, and particularly discloses a preparation process of a hot-melt pressure-sensitive adhesive with low volatility, the hot-melt pressure-sensitive adhesive comprises the following raw materials by mass: 20-30 parts of SBS, 40-80 parts of thickening resin, 30-60 parts of a softener, 0.5-2 parts of an antioxidant, and 15-20 parts of a plasticizer. The plasticizer comprises any one of dioctyl phthalate and dioctyl terephthalate, the amount of the plasticizer is 10-30 parts, so that the rubber material is soft and has good wear resistance and aging resistance, the adding amount of DOP is about 10-15 parts, and the adding amount of the adhesive is 15-25 parts, so that the adhesive has good flexibility and adhesive force; under the protection of argon, the SBS, the thickening resin, the softening agent, the antioxidant, the plasticizer and the adhesive are fully mixed to prepare the hot-melt pressure-sensitive adhesive. The plasticizer is added according to a certain proportion and is fully mixed and matched with the raw materials of the hot-melt pressure-sensitive adhesive, so that the volatility resistance of the prepared hot-melt pressure-sensitive adhesive is improved.

The present application relates to the technical field of shoes, and provides an environment-friendly mosquito-repelling slipper and a production process thereof, which comprises the following steps: preparing the mosquito-repelling slipper by in-mold foaming of a composition, wherein the composition comprises the following components in parts by weight: 40-50 parts of type 3 polyvinyl chloride resin, 20-25 parts of tributyl citrate, 5-15 parts of dioctyl terephthalate, 1-3 parts of calcium carbonate, 1-1.5 parts of industrial soda foaming agent, 0.5-1 part of expanded microspheres, 0.3-0.5 part of internal lubricant, 0.3-0.5 part of external lubricant, 15-20 parts of mosquito-repelling traditional Chinese medicine powder and 2-3 parts of flame retardant. The present application solves the problems of the existing mosquito-repelling slippers, such as the non-ideal mosquito-repelling effect and the short mosquito-repelling duration.

This invention discloses a combined process for the pretreatment of polyester waste and the preparation of dioctyl terephthalate in the field of polymer chemical recycling and resource recycling. The process utilizes specially formulated layered molybdenum-titanium bimetallic phosphate nanosheets with intercalation catalysis as a catalyst. The crushed polyester waste is mixed with isooctanol and pretreated at a lower temperature, followed by a catalytic alcoholysis and transesterification reaction. Ethylene glycol is continuously removed by fractional distillation to drive the reaction to completion. After the reaction, the mixture is cooled and filtered to separate the regenerable solid catalyst. The filtrate is then neutralized, washed with water, and subjected to two-step vacuum distillation. This process achieves a high degree of synergy between the catalyst and the reaction steps, simplifying the traditional multi-step complex process into four core steps. It has the advantages of mild reaction conditions, simple and efficient process, recyclable catalyst, and high product purity, providing a novel and practical technical solution for the high-value resource utilization of polyester waste.