259 results about "Paraffin oils" patented technology

The invention relates to a paraffin type thermostat. The paraffin type thermostat comprises a main valve 1, a cover and seal gasket assembly 2, an upper support 3, a rubber pipe 4, a valve seat 5, a vent hole 6, a lower support 7, paraffin 8, an inductor 9, a bypass valve 10, a central rod 11 and a spring 12. The upper support, the lower support and the valve seat of the thermostat are riveted into a whole. The upper end of the central rod is fixed to the center of the upper support. The lower portion of the central rod is inserted into a central hole of the rubber pipe. The lower end of the central rod is conical. A cavity between the rubber pipe and a shell of the inductor contains the paraffin. The upper portion and the lower portion of the shell of the inductor are provided with the main valve and the bypass valve which are in linkage. The vent hole is formed in the main valve. The paraffin type thermostat is high in heat conductivity and guarantees that an engine cannot be excessively cold.

The invention relates to the technical field of rubber compounds, and particularly discloses a bio-based and circulating material synergistically modified EPDM rubber compound and a preparation method thereof. The invention discloses a bio-based and circulating material synergistically modified EPDM rubber compound. The rubber compound is prepared from the following components: 100 parts of bio-based EPDM rubber, 100 to 130 parts of a reinforcing agent, 40 to 60 parts of paraffin oil, 5 to 7 parts of magnesium oxide, 0.5 to 1.5 parts of stearic acid, 6 to 8 parts of BIPB-40 peroxide, 2 to 5 parts of a Si-69 silane coupling agent, 1 to 3 parts of a dispersing agent and 1 to 3 parts of an assistant crosslinking agent, the reinforcing agent is composed of fast extruding furnace black N550, rice hull ash white carbon black and thermal cracking carbon black; and the assistant cross-linking agent is prepared from diallyl terephthalate and triallyl isocyanurate. The rubber compound prepared by utilizing the technical scheme provided by the invention can meet and maintain the mechanical property requirements, and meanwhile, carbon emission of the product in the whole life cycle is reduced from the aspects of formula and process.

The invention relates to the field of automobile part manufacturing, and particularly discloses a barrier layer direct bonding type TPE material for an automobile air conditioner pipeline system and a preparation method and application of the barrier layer direct bonding type TPE material. The TPE material is prepared from the following raw materials: a thermoplastic elastomer TPE, PA, EVOH, polyether block amide, a glycidyl methacrylate grafted olefin copolymer elastomer, a toughening compatilizer, composite modified montmorillonite, a cold-resistant additive, an antioxidant and paraffin oil. Wherein the composite silane coupling agent, lauric acid and N, N '-carbonyldiimidazole are adopted to modify the nano-montmorillonite, so that the dispersity of nano-montmorillonite particles is improved, the formation of aggregates is effectively reduced, and the mechanical property of the material is enhanced; the polyether block amide, the glycidyl methacrylate grafted olefin copolymer elastomer and the toughening compatilizer have a synergistic effect, so that good adhesiveness of the TPE material and the barrier layer is realized.

The environment-friendly cable ethylene-propylene insulation material comprises the following raw materials: ethylene propylene diene monomer, an elastomer, a reinforcing agent, a flame retardant, a vulcanizing activator, a filler, a plasticizer, an anti-aging agent, a vulcanizing agent and a silane coupling agent. 50-70 parts by mass of ethylene propylene diene monomer rubber; the elastomer is a POE (polyolefin elastomer) of 30-50 parts; the flame retardant is prepared from 30 to 50 parts of nano magnesium hydroxide, 5 to 10 parts of microencapsulated red phosphorus and 3 to 5 parts of zinc borate; and the plasticizer is paraffin oil. According to the ethylene-propylene insulating material, a halogen-free flame-retardant system is combined with an interface modification technology, so that the defects of poor mechanical property and high material toxicity of a traditional material are overcome. The oxygen index is greater than or equal to 38%, the tensile strength is greater than or equal to 10Mpa, and the material is suitable for high-risk mine environments.

The invention discloses a cleaning lubricant for textile machinery. The cleaning lubricant comprises the following components in percentage by weight: 6-14% of petroleum ether, 16-26% of solvent oil, 6-14% of alkane oil, 16-26% of 120 # solvent oil, 31-39% of butane gas and 1-9% of dimethyl silicone oil. The invention belongs to the technical field of textile, and particularly relates to a cleaning lubricant for textile machinery, which can clean greasy dirt and dirt on each movable part of a textile mill, a blowing workshop, a drawing workshop, a roving workshop and a spinning workshop. The cleaning lubricant has the technical effects of rust removal, lubrication, rust prevention, wear resistance and non-sticking to all movable parts during cleaning, and the lubricating period of the cleaning lubricant is long.

The invention relates to a waterproof sealing gasket material for a shield tunnel and a preparation method of the waterproof sealing gasket material. The preparation method comprises the following steps: plastifying raw rubber to obtain plastified raw rubber; the preparation method comprises the following steps: stirring and mixing plasticated raw rubber, carbon black N550, calcium carbonate, paraffin oil, zinc oxide, stearic acid, calcium oxide, an anti-aging agent and an organic magnesium compound, mixing in a mixing mill, and cooling to room temperature to obtain a mixture I; stirring and mixing the mixture I, modified NPE particles and an accelerant, mixing, and cooling to room temperature to obtain a mixture II; uniformly mixing the mixture II and sulfur in a mixing mill, vulcanizing at high temperature, and standing at room temperature for 24 hours to obtain the waterproof sealing gasket material. According to the waterproof sealing gasket material, the modified NPE particles of the core-shell structure are added, the compatibility of a water-swelling material and non-polar rubber is improved, the organic magnesium compound is added as a multifunctional auxiliary agent, the interface bonding, vulcanization network and flame retardant performance are synergistically improved, and the waterproof sealing gasket material has good waterproof performance. The prepared sealing gasket material has excellent mechanical properties, heat aging resistance, compression set resistance and flame retardance.

The invention discloses an energy-absorbing and shock-reducing rubber material for an ocean platform and a preparation method of the energy-absorbing and shock-reducing rubber material. The rubber material is prepared from the following raw material components: a rubber matrix, a reinforcing filler, a vulcanizing aid, a vulcanizing agent, a silane coupling agent, a vulcanizing activator, an anti-aging agent, protective wax, tear-resistant resin and paraffin oil, the preparation method comprises the following steps: plastifying, preparing master batch, preparing final mixed rubber, and vulcanizing and molding. The natural rubber and butadiene styrene rubber blend is used as a matrix, the natural rubber endows the material with high elasticity, and the butadiene styrene rubber is used for improving the aging resistance of the material; the carbon black and the fumed silica are used as reinforcing fillers, and the dispersion state of the fumed silica is optimized through the silane coupling agent, so that the mechanical properties of the energy-absorbing and shock-reducing rubber material are effectively enhanced. The prepared energy-absorbing and shock-reducing rubber material for the ocean platform can effectively overcome the defects of natural rubber in the aspects of aging resistance, seawater corrosion resistance, oil resistance and chemical corrosion resistance, and meanwhile, the excellent high-damping characteristic and fatigue resistance of the natural rubber are reserved.

The invention relates to the field of EPDM (Ethylene-Propylene-Diene Monomer) rubber, and particularly discloses a high and low temperature resistant EPDM rubber compound and a preparation method thereof. The high and low temperature resistant ethylene-propylene-diene monomer rubber compound comprises the following raw material components in parts by weight: 100 parts of ethylene-propylene-diene monomer; 20 to 25 parts of compound gutta-percha; 40 to 45 parts of carbon black; 20 to 25 parts of white carbon black; 5 to 10 parts of paraffin oil; 2-3 parts of zinc oxide; 1-2 parts of stearic acid; 1.5 to 2.5 parts of peroxide; 2 to 2.5 parts of a crosslinking auxiliary agent; 2-3 parts of an anti-aging agent; 1 part of sulfur; and 2-3 parts of an accelerant. The ethylene-propylene-diene monomer rubber compound can still keep good rebound resilience and mechanical performance at-20 DEG C or below, the mass change rate of the ethylene-propylene-diene monomer rubber compound subjected to heat treatment at 150 DEG C for 96 h does not exceed 1.4 wt%, the stable performance in a high-temperature environment is ensured, the low-temperature characteristic T10 rigid modulus of the ethylene-propylene-diene monomer rubber compound reaches-50 DEG C or even lower, and the application range is wide.

The present invention relates to the technical field of polymer materials, and specifically to a tungsten-containing lead-free radiation-proof rubber glove and a preparation method thereof. The present invention overcomes the disadvantages of poor radiation-proof ability and poor anti-permeability performance. After the modified ethylene propylene diene monomer rubber is plastified, an activator and an antioxidant are added for the first stage of internal mixing, then carbon black, a composite reinforcing agent, a radiation shielding powder, and a dispersant are added for the second stage of internal mixing, and finally paraffin oil is added for the third stage of internal mixing to obtain a crude mixed rubber; the crude mixed rubber, the radiation shielding powder, the dispersant, a vulcanizing agent, and a vulcanization aid are mixed and open-milled to obtain a rubber sheet; after the rubber sheet is parked, filtered, injection molded, second-stage vulcanized, cleaned, and dried, a tungsten-containing lead-free radiation-proof rubber glove is obtained. The tungsten-containing lead-free radiation-proof rubber glove prepared by the present invention has strong radiation-proof performance and strong anti-permeability performance, and is suitable for the protection of complex radiation environments.

The invention discloses a semiconductive ethylene propylene diene monomer and a preparation method and application thereof. The semiconductive ethylene-propylene-diene monomer is prepared from the following raw materials: ethylene-propylene-diene monomer, zinc oxide, an anti-aging agent, paraffin oil, liquid ethylene-propylene-diene monomer, superconductive carbon black, reinforcing carbon black, a vulcanizing agent and a vulcanizing aid. Wherein the ethylene content of the liquid ethylene-propylene rubber is 60-75wt%, and the molecular weight of the liquid ethylene-propylene rubber is 5000-40000. The semi-conductive ethylene propylene diene monomer adopts a peroxide-vulcanization mixed system, and the semi-conductive ethylene propylene diene monomer prepared by adopting the formula has the advantages of low volume resistivity (less than or equal to 15 omega.cm), high tear strength (greater than or equal to 35 MPa), high tensile strength (greater than or equal to 13 MPa), high bonding strength (greater than or equal to 7 MPa), low rubber content, no color flooding in product appearance and the like; the method can be used for preparing semiconductive materials in the high-voltage and ultrahigh-voltage direct current field.

The invention discloses a high and low temperature resistant ethylene propylene rubber base material and a preparation method thereof. The high and low temperature resistant ethylene propylene rubber base material comprises the following raw material components in parts by weight: 50-80 parts of ethylene propylene diene monomer, 40-60 parts of silicone rubber, 10-30 parts of a compatibilizer, 1-5 parts of zinc oxide, 1-3 parts of stearic acid, 10-30 parts of carbon black, 8-12 parts of paraffin oil, 1-2 parts of an anti-aging agent, 0.5-2 parts of a coupling agent, 1-5 parts of a vulcanizing agent, 1-4 parts of an accelerant and 2-5 parts of a reinforcing agent. The ethylene propylene rubber base material is prepared by mixing the raw materials and carrying out plastication, thin-passing, batch-off standing and vulcanization operation process steps, the prepared ethylene propylene rubber base material has excellent mechanical properties, aging resistance and high and low temperature resistance, and the preparation method is simple in process, easy to operate and suitable for industrial production. And the production cost can be reduced.

The invention relates to the field of sealing strips, in particular to an ethylene propylene diene monomer sealing strip and a preparation method thereof. Comprising the following components in parts by weight: 150-180 parts of ethylene propylene diene monomer, 60-90 parts of carbon black, 8-12 parts of white carbon black, 3-8 parts of a peroxide vulcanizing agent, 6-12 parts of zinc oxide, 12-16 parts of magnesium oxide, 10-18 parts of paraffin oil, 1-3 parts of an accelerant, 1-3 parts of stearic acid, 1-3 parts of an anti-aging agent and 1-3 parts of a coupling agent. According to the invention, a C-C cross-linked bond is generated through the synergistic effect between the carbon black and the white carbon black activated by the coupling agent and the free radical reaction of the peroxide vulcanizing agent, so that a high-density and uniform cross-linked network is formed, and the tensile strength of the ethylene propylene diene monomer sealing strip is effectively improved.

The invention discloses a corrosion-resistant water-stop belt and a preparation method thereof, and relates to the technical field of high-molecular compound composition water-stop belts. The corrosion-resistant water-stop belt is prepared from the following raw materials in parts by mass: 50-70 parts of ethylene propylene diene monomer, 20-40 parts of chloroprene rubber, 3-8 parts of zinc oxide, 1-3 parts of stearic acid, 1-2 parts of an anti-aging agent, 5-15 parts of paraffin oil, 20-40 parts of white carbon black, 30-50 parts of calcium carbonate, 1.5-3 parts of sulfur and 0.5-1.5 parts of an accelerant. The accelerant accurately regulates and controls the sulfur cross-linking process to form a high-density and uniform sulfur bond network structure, so that the material can still maintain excellent mechanical properties such as tensile strength and elongation at break in a corrosion environment, and sealing failure caused by swelling or aging is avoided.

The invention belongs to the technical field of TPV materials, and particularly relates to an anti-ultraviolet halogen-free flame-retardant TPV material and a preparation method thereof. The TPV material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 10-30 parts of an ethylene-vinyl acetate copolymer, 20-30 parts of polypropylene, 50-100 parts of paraffin oil, 1-5 parts of an antioxidant, 1-3 parts of a cross-linking agent, 1-5 parts of a lubricant and 10-20 parts of functional phosphate. According to the invention, a phosphate structure with a flame-retardant effect and a benzimidazole structure with an ultraviolet absorption function are introduced into the same molecule to realize multi-functionalization of the modifier, so that the prepared TPV material has excellent flame-retardant and anti-ultraviolet properties.

The invention discloses a method for microfluidic high-throughput screening of AKK bacteria. The method comprises the following steps: 1) preparing a microfluidic chip; 2) collecting fresh excrement of healthy volunteers, diluting, and adding a fluorescence labeled antibody to obtain a dispersion phase; and (3) preparing liquid drops by taking paraffin oil and Span-80 as a mobile phase, enabling the liquid drops to enter a liquid drop culture tank through an S-shaped liquid drop circulation channel, culturing, introducing the mobile phase, introducing the liquid drops in the liquid drop culture tank into a liquid drop collection tank, taking out, detecting a fluorescence signal, culturing the liquid drops with the fluorescence signal on the improved brain heart infusion broth solid culture medium, and obtaining the brain heart infusion broth. Obtaining a to-be-identified strain; 4, the strain to be identified serves as a template, PCR amplification is conducted, sequencing is conducted on an amplification product, BLAST sequence comparison is conducted on a sequencing result on an NCBI website, and the target strain AKK bacterium is screened out. The method has the advantages of being high in throughput, simple in experimental process and high in specificity, and the screening efficiency of the AKK bacterium can be improved.

The invention relates to the technical field of rubber, and provides a high-strength rubber transmission belt as well as a preparation method and application thereof. The high-strength rubber transmission belt is prepared from the following raw materials in parts by weight: 90 to 110 parts of ethylene propylene diene monomer, 6 to 10 parts of aramid fiber, 3 to 9 parts of nylon, 40 to 50 parts of filler, 4 to 6 parts of vulcanizing activator, 5 to 9 parts of paraffin oil, 4 to 7 parts of adhesive, 3 to 4 parts of anti-aging agent, 11 to 15 parts of auxiliary vulcanizing agent, 2 to 4 parts of vulcanizing agent and 0.1 to 0.5 part of scorch retarder. The filler is prepared from the following raw materials in parts by weight: 100 parts of carbon black, 5 to 7 parts of 4-maleimidobenzoic acid and 5 to 7 parts of 2, 2-dimethylolpropionic acid. Through the technical scheme, the problem of insufficient strength of the rubber transmission belt in the related technology is solved.

A preparation method for a urea-formaldehyde microcapsule, comprising: uniformly mixing an emulsifier, urea, ammonium chloride, resorcinol and deionized water, adjusting the pH value, defoaming, adding dicyclopentadiene to form an emulsion, after stabilization, adding a formaldehyde solution and paraffin oil, covering and heating the emulsion for polymerization, and cooling and washing to obtain a urea-formaldehyde microcapsule.

The application discloses a soft capsule pill press rubber forming and conveying system, which comprises a syringe and two sets of spreading boxes, rubber drum wheels and air coolers symmetrically arranged on the upper sides of the syringe, wherein flowing glue is coated on the rotating rubber drum wheel through the spreading box and forms the rubber extending to the syringe downward through the air cooler under the driving of the rubber drum wheel. The application improves and rearranges the spreading box, rubber drum wheel and air cooler in the old pill press, establishes a new rubber forming and conveying system, removes the multiple transmission felt wheels needed for the upward transmission of the rubber, makes the glue in the spreading box flow into the cooling channel of the air cooler from high to low, and forms the rubber directly entering the rotating die of the pressing die in the cooling channel, thereby reducing the use amount of paraffin oil.

This invention discloses a thermoplastic elastomer composition, its preparation method, and its applications. The thermoplastic elastomer composition of this invention comprises the following components: PP resin I, SEBS, TPV, glass fiber powder, paraffin oil, antioxidant, and light stabilizer; wherein, the PP resin I conforms to ISO 1133-1-2011 standard, with a melt index of 80–130 g / 10 min at 230°C and 2.16 kg; the SEBS has a weight-average molecular weight of 80,000–160,000; and the TPV comprises PP resin II and EPDM. The thermoplastic elastomer composition of this invention combines PP resin with a specific melt index, SEBS with a specific weight-average molecular weight, and TPV, resulting in a thermoplastic elastomer composition that possesses both high fluidity and low gloss, as well as excellent high-temperature resistance.

The present invention belongs to the technical field of potassium metal production, and specifically provides a preparation process and device for potassium metal, including a roll crusher. The discharge port of the roll crusher is communicated with the feed port of a dryer through a vibrating feeder. The discharge port of the dryer is communicated with the feed port of a potassium chloride storage tank through a conveying auger. The discharge port of the potassium chloride storage tank is communicated with a first feeding port at the top of a reaction furnace. A second feeding port is also provided at the top of the reaction furnace and is communicated with the discharge port of a sodium metal storage tank. The reaction furnace is a replaceable inner sleeve type reaction furnace. The discharge port of the reaction furnace is communicated with the feed port of a sodium chloride temporary storage tank through a melt pump. An exhaust port is also provided at the top of the reaction furnace, and the exhaust port is communicated with a condensation tower through an air suction fan. The liquid outlet at the bottom of the condensation tower is communicated with the bottom of a clamping groove filled with paraffin oil. By replacing the inner sleeve of the reaction furnace, the stability of the high-temperature reaction between sodium metal and potassium chloride can be ensured. Based on the above-mentioned potassium metal preparation device, the preparation of potassium metal can be realized.

The invention relates to the technical field of chemical production cleaning, in particular to an alkyl metal compound inactivation device and an inactivation method thereof.The alkyl metal compound inactivation device comprises an alkyl metal compound storage tank, an inactivation assembly, an air blowing pipeline, a cooling assembly and a paraffin oil-containing container, a top inlet of the inactivation assembly is communicated with a new water pipeline, and a bottom inlet of the inactivation assembly is communicated with a mixed nitrogen pipeline; a water vapor injection pipeline is fixedly communicated between the mixed nitrogen pipeline and a top inlet of the alkyl metal compound storage tank, a bottom inlet of the alkyl metal compound storage tank is fixedly communicated with an air blowing pipeline, and a cooling assembly is arranged on the outer wall of the alkyl metal compound storage tank. By adopting a water filling mode, the production cost is reduced, meanwhile, new water is brought into the alkyl metal compound storage tank in a vaporific form by nitrogen and is in full contact with alkyl metal residues to inactivate the alkyl metal residues, heat release and storage tank pressure in the reaction process are controlled through the cooling assembly, and the risk of overtemperature and overpressure of equipment is prevented.

The invention relates to the technical field of organic synthesis, in particular to a preparation method of crude poly (p-phenylene terephthamide). According to the method, phase-to-phase switching between non-aqueous suspension and ionic liquid homogeneous phase is adopted, and AB type end group balance, alternating end sealing and interface confinement branching are combined to realize end group accurate control and molecular weight distribution convergence. The method comprises the following steps: emulsifying an N-methyl pyrrolidone / calcium chloride solution in paraffin oil; carrying out polycondensation with p-phenylenediamine and paraphthaloyl chloride at a low temperature, and adding p-aminobenzoyl chloride to carry out dynamic balance on an end group; after layering, transferring into 1-butyl-3-methylimidazole chloride / N, N-dimethylacetamide for continuous polycondensation; cooling and re-emulsifying, and alternately adding benzoyl chloride and p-toluyl chloride for end sealing; trimesoyl chloride is added to a phase interface to realize limited branching; and carrying out ionic liquid homogenization, amine termination and alcohol / water sedimentation washing to obtain the product. The method effectively relieves end group drift, inhibits high molecular weight tailing and improves the filtering performance, and is suitable for preparation of high-reliability aramid fibers.

The invention relates to oil seal liquid and application thereof in blood coagulation detection, and belongs to the technical field of blood coagulation detection. The oil seal liquid can form a uniform film when covering a plasma sample, the activity of thrombin is not affected while air is isolated, and in addition, the oil seal liquid is a biological inert formula, is easy to clean and does not generate adsorption or reaction with blood coagulation factors and reagents. Therefore, the oil seal liquid and the sample are incubated synchronously in the pre-warming stage, and errors caused by sample evaporation and temperature fluctuation in the pre-warming stage can be reduced. Compared with traditional paraffin oil, the oil seal liquid can effectively isolate air to avoid sample evaporation and reduce reagent interference, is easy to clean, provides reliable technical support for blood coagulation factor deficiency and precise identification of inhibitors, and is suitable for APTT correction experiments, PT correction experiments or clinical detection and application of lupus anticoagulant (LA).

The application belongs to the technical field of rubber, and particularly relates to an environment-friendly weather-resistant high-wear-resistance handrail belt rubber material and a preparation method thereof. The rubber material comprises, in terms of weight parts, 80-95 parts of styrene-butadiene rubber, 5-20 parts of butadiene rubber, 70-90 parts of carbon black, 6-9 parts of active agent, 3-5 parts of environment-friendly paraffin oil or naphthenic oil, 4-7 parts of anti-aging agent composition, 1-2 parts of accelerator and 1.5-2.5 parts of vulcanizing agent. The anti-aging agent composition is a combined system of p-phenylenediamine anti-aging agent and quinoline anti-aging agent. Through the synergistic effect of the rubber combined system, the gradation optimization of the reinforcing system and the synergistic effect of the anti-aging agent composition, the application simultaneously realizes high wear resistance, excellent weather resistance (ozone and thermal oxygen aging resistance), low-temperature toughness at-45 DEG C and environment-friendly performance of PAHs <= 10 ppm, and the comprehensive performance is significantly better than that of the existing handrail belt material, and the eight-year service life requirement of public places can be met.

The application discloses a kind of high-temperature-resistant long-life cable material for charging pile cable and a preparation method thereof, and relates to the field of cable material.The cable material includes ethylene-propylene rubber, acrylate rubber, a compatibilizer, stearic acid, zinc oxide, paraffin oil, a vulcanizing agent, a vulcanization aid, nano filler supported antioxidant, and reinforcing filler.The application uses acrylate rubber and ethylene-propylene rubber blending to improve material plasticity and temperature resistance grade, and uses nano filler with reinforcing effect to disperse uniformly and stably in rubber matrix and has the characteristics of improving mechanical properties.The antioxidant is loaded on the nano filler to avoid surface migration of the antioxidant at high temperature, which significantly improves the high-temperature resistance and mechanical properties of the cable material, and can meet the challenges of cable material performance caused by the gradual shortening of charging time and the increasing of charging current of charging pile.

The invention discloses a foaming material for a floor sound insulation board and a preparation method of the foaming material. Comprising the following raw materials in parts by weight: 25-45 parts of nitrile rubber, 25-45 parts of polyvinyl chloride, 10-20 parts of chlorinated polyvinyl chloride, 110-150 parts of filler, 10-20 parts of a foaming agent, 5-15 parts of decabromodiphenyl ethane, 3-7 parts of antimony trioxide, 1-3 parts of butadiene rubber, 8-12 parts of carbon black, 4-8 parts of paraffin, 65-85 parts of chlorinated paraffin oil, 2-3 parts of a lubricant, 1-3 parts of epoxidized soybean oil, 0.3-0.9 part of an anti-aging agent and 2-4 parts of an accelerant. 0.2 to 0.6 part of zinc oxide and 0.4 to 0.8 part of vulcanizing agent. The foaming material provided by the invention takes the nitrile rubber, the polyvinyl chloride and the chlorinated polyvinyl chloride as main materials, is used for the floor sound insulation board, and has high mechanical properties and good anti-aging performance.

The invention belongs to the field of propane dehydrogenation catalysts, and particularly provides a spherical alumina carrier for propane dehydrogenation, a preparation method of the spherical alumina carrier and a catalyst.The preparation method of the spherical alumina carrier for propane dehydrogenation comprises the following steps that 1, pseudo-boehmite sol and polysaccharide are evenly mixed, and a precursor solution is obtained after curing; (2) dropwise adding the precursor solution into an oil ammonia forming column, and gelatinizing and curing to obtain gel balls; the upper layer of the oil ammonia forming column is a paraffin oil layer, and the lower layer is a composite ammonia water solution; the composite ammonia water solution comprises ammonia water, 2-formylphenylboronic acid and zinc nitrate; and 3) washing the obtained gel balls with deionized water and absolute ethyl alcohol, then transferring the gel balls into an aging solution for aging, filtering, washing, drying, and then roasting to obtain the catalyst. The catalyst prepared by the invention has the advantages of high catalytic activity and coking resistance.

The invention discloses an MBBR (Moving Bed Biofilm Reactor) composite modified filler as well as a preparation method and application thereof, the MBBR composite modified filler comprises the following raw material components in parts by mass: 5-15 parts of elemental iron-carbon powder, 80-95 parts of a framework material, 5-10 parts of a corrosion inhibition carbon source and 3-5 parts of paraffin oil, wherein the corrosion inhibition carbon source comprises modified chitosan and starch, and the mass ratio of the modified chitosan to the starch is (1.5-4): 1; the modified chitosan comprises chitosan, 2-hydroxy-1, 4-naphthoquinone which is grafted on the chitosan through a-C = N-bond, and catechin which is grafted on the 2-hydroxy-1, 4-naphthoquinone. The iron-carbon micro-electrolysis technology is combined with the MBBR process, so that the biodegradability of the refractory wastewater is improved, and the wastewater treatment effect of the MBBR process is improved.

The present invention provides an environment-friendly pressure-resistant inner tube and a preparation method thereof, the preparation method comprising the following steps: (1) weighing raw materials of a masterbatch, specifically comprising the following components in parts by weight: 60-65 parts of butyl rubber, 35-40 parts of modified waste butyl rubber, 6-11 parts of EVA resin, 5-10 parts of chloroprene rubber, 70-75 parts of carbon black, 4-9 parts of modified filler, 6-12 parts of paraffin oil, 3-6 parts of a cross-linking agent, 1-1.5 parts of stearic acid, and 1.6-1.8 parts of sulfur; (2) adding butyl rubber, modified waste butyl rubber, chloroprene rubber, and EVA resin into a closed rubber mixer and kneading for 5-7 minutes; continuing to add carbon black and modified filler under heat preservation conditions and kneading for 2-3 minutes; finally, adding the remaining components and kneading for 5-7 minutes to obtain a mixed rubber, molding the mixed rubber, and vulcanizing it to obtain an environment-friendly pressure-resistant inner tube. The inner tube of the present invention has excellent comprehensive performance.

The application relates to the technical field of mixing rubber, and particularly discloses an EPDM air conditioner pipe material mixing rubber for new energy vehicles and a preparation method thereof. The mixing rubber disclosed by the application comprises the following components: 75-125 parts of EPDM raw rubber, 100-140 parts of a reinforcing agent, 50-60 parts of paraffin oil, 10-30 parts of modified kaolin, 4-6 parts of zinc oxide, 1-3 parts of stearic acid, 0.5-1.5 parts of an antioxidant, 0.2-0.4 parts of sulfur and 5-6 parts of a crosslinking aid; the reinforcing agent is composed of fast-pressing out furnace black N550 and semi-reinforcing furnace black N774; and the modified kaolin is obtained by modifying a mixture of kaolin and sodium lignosulfonate with a titanate coupling agent. Through formula optimization and adjustment, the mixing rubber prepared by the application has improved low-temperature shrinkage performance under the premise of meeting the high-temperature aging resistance requirement, and can meet the high-temperature and low-temperature requirements simultaneously.