27 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 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 preparation method of a liquid crystal polymer diaphragm and the liquid crystal polymer diaphragm. The preparation method comprises the following steps: providing a soluble liquid crystal polymer, dissolving the soluble liquid crystal polymer in a first solvent, stirring and mixing to obtain a first mixed solution. Fillers are added into the first mixed solution, and dispersion treatment and defoaming treatment are performed to obtain a slurry. The fillers comprise at least one of paraffin oil, aluminum triacetylacetone powder, azodicarbonamide, calcium carbonate powder, silica powder, sodium bicarbonate powder and starch powder. A substrate is provided, the slurry is coated on the substrate, and a wet film is formed on the substrate. The wet film is subjected to drying and curing treatment, and the fillers are removed to obtain a first film body with a porous structure. The first film body is peeled off from the substrate to obtain the liquid crystal polymer diaphragm. In the preparation process of the liquid crystal polymer diaphragm, the fillers are added, the fillers are used for occupying positions in the wet film and are removed, the porous structure in the liquid crystal polymer diaphragm is increased, and the porosity is improved.

The present application relates to the field of chip encapsulation, and particularly relates to a chip encapsulation and a preparation of an embedded chip conveying belt, wherein natural rubber and butadiene rubber are put into a torque rheometer, then an activator, a composite wave-transparent agent, modified rice husk and paraffin oil are sequentially added, mixing is carried out, standing is performed, sulfur, a scorch retarder and an accelerator are added, mixing is carried out, a mill is used to press a sheet, cooling is performed, and a chip encapsulation is obtained; lignin and silicon dioxide are extracted and precipitated from the rice husk by using an alkali extraction and an acid co-precipitation method, a nano-sized spherical lignin-silica hybrid material is obtained by self-assembly through intermolecular hydrogen bonds as a pretreated rice husk, the aldehyde group of the pretreated rice husk is modified, and then a phosphorus-amine ionic liquid is grafted; silicon nitride, glass fiber and aramid fiber are compounded as a wave-transparent agent, the wave-transparent agent is epoxidized first, and then the phosphorus-amine ionic liquid is grafted.

This invention relates to the field of lubricant technology, specifically to a lubricant for agricultural machinery and its preparation method. This agricultural machinery lubricant, by weight, comprises the following components: 85-93 parts of a first base oil, 2.0-3.0 parts of 1,3-bis(3-phenoxyphenoxy)benzene, 0.2-0.3 parts of zinc dialkyl dithiophosphate, 0.5-1.0 parts of a graphene-based anti-wear additive, 2.0-4.0 parts of polyisobutylene succinimide, 0.5-1.5 parts of a hindered phenolic antioxidant, 1.5-3.0 parts of hydrogenated styrene-isoprene copolymer, and 0.2-0.6 parts of polymethacrylate; wherein the first base oil comprises poly(α-olefin) PAO4 and paraffin oil in a weight ratio of 2-3:1. The agricultural machinery lubricant provided by this invention improves the anti-wear and friction-reducing properties of the graphene-based anti-wear additive, and enhances the stable dispersibility of functionalized graphene in the oil phase and its interfacial properties with the oil phase.

This invention relates to an EPDM-based crosslinked rubber material and its preparation method. The rubber material is obtained by vulcanizing raw rubber composed of EPDM rubber, maleic anhydride-grafted polyethylene, a peroxide vulcanizing agent, ethylene glycol dimethacrylate, p-benzoquinone dioxime, lead metal oxide, paraffin oil, a silane coupling agent, and an antioxidant. The EPDM-based crosslinked rubber material obtained by this invention has a double crosslinked structure. The formulation system endows EPDM rubber with excellent physical and mechanical properties, electrical insulation properties, and aging resistance, while also possessing good injection molding performance. This material solves the problems of high prices and long procurement cycles associated with imported finished products, providing an efficient and economical solution for the production of cable accessories.

This application relates to the field of rubber magnetic strip processing technology, and more specifically, to a gasoline-resistant rubber magnetic strip and its preparation method, which is prepared from the following raw materials in parts by weight: 85-92 parts magnetic powder, 4-8 parts nitrile rubber, 0.5-1 part dispersant, 0.1-0.5 parts coupling agent, 0.15-0.5 parts anti-aging agent, 0.2-0.5 parts zinc oxide, 0.1-0.2 parts di-tert-butyl peroxide, 0.2-0.5 parts triallyl isocyanurate, and 0 parts toughening agent. 0.15-0.6 parts, oil-resistant plasticizer 0.5-1 parts, wherein the oil-resistant plasticizer is composed of paraffin oil, adipic acid-based polyester and sebacic acid-based polyester. The above formula effectively solves the problems of swelling and interface debonding of existing nitrile rubber-based magnetic strips in gasoline environment. It can still maintain good chemical stability in oily environment for a long time, and the volume expansion rate is significantly reduced. It can avoid fan speed instability, start-stop failure or jamming, etc., and also has good flexibility and impact resistance.

This invention discloses a low-closed-cell, high-breakage-temperature separator and its preparation method. The separator has a TMA breakage temperature ≥180℃, a TMA pore-closing temperature ≤130℃, and the difference between the TMA breakage temperature and the TMA pore-closing temperature is ≥50℃. The method includes the following steps: S1, mixing a polyethylene mixture of high-density polyethylene, high-molecular-weight high-density polyethylene, and ultra-high-molecular-weight polyethylene with paraffin oil, followed by mixing, extrusion, cooling casting, stretching, and extraction to obtain a substrate; S2, mixing a photoinitiator with a solvent, dissolving, and stirring evenly to obtain a modifier solution; S3, fully contacting the modifier solution obtained in step S2 with the substrate obtained in step S1, and drying to obtain an initial separator; S4, subjecting the initial separator to phototreatment to obtain a low-closed-cell, high-breakage-temperature separator. This invention effectively reduces the pore-closing temperature of the separator while increasing the breakage temperature, which is beneficial for improving the safety of lithium batteries.

This invention relates to the field of polymer materials technology, specifically to a weather-resistant rubber material for sealing strips and its preparation method: It is made from the following raw materials in parts by weight: 60-80 parts rubber matrix, 5-10 parts silica, 20-40 parts composite weather-resistant filler, 1-3 parts dioxane, 0.5-1.5 parts triallyl isocyanurate, 5-10 parts paraffin oil, 1-2 parts phenolic antioxidant, and 0.5-1.5 parts lubricant. In this invention, the modified filler uses cerium-doped zirconium phosphate as the core component. The variable valence of cerium ions continuously captures and passivates the active free radicals generated during the thermo-oxidative aging of rubber. Simultaneously, the layered structure of zirconium phosphate forms a physical barrier against oxygen and ozone. The modified filler inhibits the oxidation chain reaction at its source, while the chemically bonded interface prevents filler detachment during aging, thus preventing protective failure and maintaining material stability in long-term thermo-oxidative and ozone environments.

The application discloses a kind of prevent wall surface oil to drip oil receiving mechanism, including tray four;Two ends of tray four are symmetrically installed and set up tray installation support along center, the upper portion of tray installation support is provided with oil receiving assembly, and the end of tray two close to tray one is installed and set up auxiliary assembly, and the cooperation of each tray, oil receiving assembly and other structures realizes that oil is received completely, the entire ground under equipment is blocked by oil receiving device, avoids the influence caused by oil falling on ground;Secondly, the oil that equipment wall surface flows also is received, keeps the neatness of ground, and improves the oil recovery rate;Finally, each tray can slide relative, expose ground, facilitate equipment maintenance, simultaneously, by auxiliary assembly, after the separation of the tray that cooperates with the tray that slides in certain, corresponding tray is sealed, avoid the oil on it from falling on ground, to improve the recovery rate of paraffin oil in diaphragm production process, and improve the environment of production site.

The utility model belongs to the fresh -keeping paper processing technical field, concretely relates to a kind of fresh -keeping paper spraying equipment, including conveyer belt, and the middle part of conveyer belt is provided with spraying mechanism;Spraying mechanism includes the shell of installation in the middle part of conveyer belt, and the middle part of shell upper end is equipped with atomizing pump, and the input end of atomizing pump is communicated with storage tank by pipeline, and the inside of shell is provided with spray head, and the output end of atomizing pump is connected with spray head by pipeline, and the front and back sides of shell are provided with collection component;The device is equipped with perfect interception and collection component, and the excess paraffin oil sprayed by spray head can be effectively intercepted, to prevent it from splashing on conveyer belt and other components of equipment, which reduces the loss of paraffin oil, reduces raw material cost and improves resource utilization.

The application provides a low-frangibility high-resilience rubber band and a preparation method thereof, and relates to the technical field of rubber band preparation.The low-frangibility high-resilience rubber band is prepared from the following raw materials: natural rubber, sulfur, modified zinc oxide, stearic acid, 2-mercaptobenzothiazole, N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, calcium carbonate and paraffin oil.The modified zinc oxide is obtained by modifying zinc oxide with a surfactant and then compounding the modified zinc oxide with functionalized silicon dioxide.The application overcomes the shortcomings of the prior art.The application uses natural rubber as a preparation base material, and based on the advantages of good elasticity and high tensile rate of the natural rubber, the modified zinc oxide is added to improve the resilience rate and balance the vulcanization crosslinking density, so that the resilience is maintained while the frangibility is reduced in a high-cold environment, and the general application value of the prepared rubber band in different environments is comprehensively improved.

This invention discloses a safe, low-temperature, rapid vulcanizing compound and its preparation method, belonging to the field of compound technology. By weight, it comprises 100 parts of EPDM rubber, 40-60 parts of aminated silica modified with a multi-point anchoring thiourea bridging agent, 2-5 parts of zinc oxide, 1-3 parts of fatty acid activator, 3-8 parts of paraffin oil, 0.5-1.5 parts of sulfur, and 0.5-1 parts of peroxide vulcanizing agent. The multi-point anchoring thiourea bridging agent modified aminated silica comprises a product obtained by reacting the multi-point anchoring thiourea bridging agent with aminated silica. The multi-point anchoring thiourea bridging agent molecule includes epoxy groups, thiourea groups, and allyl groups. This invention achieves low-temperature, rapid vulcanization with reduced peroxide content by using a multi-point anchoring thiourea bridging agent, while simultaneously constructing strong interfacial chemical bridging, improving filler dispersion, and enhancing mechanical properties.

The application relates to the technical field of high polymer material processing, in particular to aramid pulp pre-dispersion and a preparation method thereof, and the preparation method comprises the following steps: step 1, aramid pulp is dried under vacuum conditions to obtain absolutely dry aramid pulp; paraffin oil, stearic acid and a silane coupling agent are mixed in proportion, first stirring and heating is carried out, a uniform modified oil phase is formed, and the modified oil phase is divided into A parts and B parts; step 2, the absolutely dry aramid pulp is added into the A parts of the modified oil phase, second stirring and heating is carried out, and an oil phase coating layer is formed on the surface of the fiber until the oil phase coating layer is formed on the surface of the fiber; then the B parts of the modified oil phase are added, third stirring and heating is carried out, and a paste-like mixture is formed; and step 3, the paste-like mixture is subjected to fourth stirring and heating to obtain aramid pulp pre-dispersion. The application relates to a preparation method of aramid pulp pre-dispersion, and through the synergistic effect of staged oil phase infiltration and in-situ silane coupling reaction, the modified treatment of stably pre-dispersing aramid pulp in a rubber matrix is realized.

To overcome the problem of light transmittance defects in lithium battery separators prepared by wet processes in the existing technology, this invention provides a novel method for preparing lithium battery polyolefin separators without light transmittance defects. The extrusion process of this invention must meet at least two of the following conditions: (1) the ratio of the average temperature Te of each zone in the extruder to the average torque of the extruder is 100–1000; (2) the temperature of the extrusion process satisfies: Tr = 3(Te + To) / 4; where Tr is the high-temperature melt temperature, Te is the average temperature of each zone in the extruder, and To is the temperature of the paraffin oil before entering the extruder; (3) the pressure in the extrusion process satisfies: Pj = (Pr * Pg) / 2; where Pj is the extruder die head pressure, Pr is the pressure after the melt gear pump, and Pg is the pressure after the melt filter. Based on the special extrusion process parameters provided by this invention, lithium battery polyolefin separators without light transmittance defects can be prepared.

The application discloses a composite absorbent based on diethylene glycol and paraffin oil, belongs to the field of chemical separation and gas purification, and comprises the following components in parts by weight: diethylene glycol 30-70 parts; paraffin oil 30-70 parts; and viscosity regulator 0-5 parts. The application solves the problem of narrow absorption spectrum of single solvent by synergistic solubilization of polar-nonpolar components, can simultaneously and efficiently absorb polar components such as water and alcohol and nonpolar hydrocarbons such as alkane and aromatic hydrocarbon, replaces traditional step-by-step absorption process, reduces equipment investment by 30-40%, simplifies process and is convenient to operate; the total absorption capacity of the composite absorbent is increased by 30-50% compared with single diethylene glycol or paraffin oil, the mass transfer rate is increased by 25-40%, the absorption efficiency of low-concentration gas phase components (such as VOCs concentration 500-1000 mg / m 3 ) is greater than or equal to 95%, and the composite absorbent is suitable for different concentration conditions.

This invention discloses a black adhesive material for hot-melt bonding of EPDM rubber strips and its preparation method, belonging to the field of rubber product processing technology. The black adhesive material is obtained by mixing adhesive component A and adhesive component B diluted with gasoline. Adhesive component A includes EPDM rubber, paraffin oil, zinc oxide, stearic acid, PEG4000, dispersant, light calcium carbonate, and carbon black; adhesive component B includes sulfur and various vulcanization accelerators. During preparation, the components of adhesive component A are plasticized, mixed, and thin-passed to obtain component A. The vulcanization system is then mixed to obtain component B, which is diluted with gasoline and mixed with component A before use. When the adhesive material obtained by this invention is used for end splicing, corner connection, and hot-melt bonding of EPDM rubber strips, it can form a continuous and uniform black adhesive transition layer, improving joint peel strength, interface stability, aging resistance, and compression rebound retention.

The application discloses a diaphragm production method and device of bidirectional synchronous stretching, wherein the diaphragm production method is after the feeding, extruding and casting piece processes, the diaphragm is subjected to the processes of cutting switching, assembling double stretching, extraction, assembling horizontal stretching and multi-station winding, each partition in the assembling double stretching and the assembling horizontal stretching comprises a temperature control box, the diaphragm is sequentially subjected to preheating, stretching, heat setting and cooling in each temperature control box, each temperature control box can simultaneously realize temperature gradient control from the upper and lower directions and the direction of the film surface, and the air inlet speed can also be controlled individually, so that the problem of the speed and temperature difference existing on both sides and the middle of the film surface during stretching is solved, and the consistency of stretching and setting is realized. After the diaphragm is cut and switched, the diaphragm vertically advances, the gravity of paraffin oil between diaphragm molecules is the same as the direction of vertical stretching stress, the motion timeliness of diaphragm molecular chains is better, stress transmission is more uniform during the stretching process, a compact micro-fiber network structure is formed, and the stretching strength and puncture strength of the diaphragm are improved.

The utility model discloses a mobile ward round vehicle, including ward round trolley, the medical placement platform is seted up in ward round trolley upside, the medical placement platform inside left side is seted up with the disinfectant limiting slot, the medical placement platform inside right side swing mounting is used for the limiting component for the paraffin oil bottle body position limiting, the switch component for controlling limiting component is used to the ward round trolley lower part elasticity, effectively solved the current diagnosis paraffin oil dropper and need to be fixed on the wall body and can not move the problem, it can be carried when the resident physician ward round, can be in the patient's room for the patient anus finger examination at any time, need not to shift the patient to the specific examination room, reduced the patient movement, greatly promoted the portability and examination efficiency, realized instant evaluation, especially for rectal cancer postoperative patient, can fast bed side evaluation anastomotic mouth healing etc. situation, dynamic observation illness.

This invention relates to the field of rubber sealing ring technology, and proposes a high-temperature resistant EPDM rubber sealing ring and its preparation method. A high-temperature resistant EPDM rubber sealing ring comprises the following components in parts by weight: 100 parts EPDM rubber, 60-80 parts modified molybdenum disulfide, 30-50 parts paraffin oil, 4-8 parts activator, 1-3 parts antioxidant, 0.5-1.5 parts vulcanizing agent, and 2-3 parts accelerator; the modified molybdenum disulfide is molybdenum disulfide modified with phenoxyacetic anhydride. Through the above technical solution, the problem of poor high-temperature resistance of EPDM rubber in the prior art is solved.

The application discloses a kind of super-soft high-elasticity hot melt films with skin-friendly, it relates to hot melt film technical field, the super-soft high-elasticity hot melt film with skin-friendly, raw material is by weight percentage, including as follows component: SBC class (SEBS, SEPS, SIS, SBS) elastomer: 45%-75%;TPU: 20%-35%;Compatibility agent (maleic anhydride grafting SIS / SBS class): 2%-10%;Paraffin oil or naphthenic oil: 2%-5%;Tackifying resin (carbon 5 or carbon 9): 1%-5%;Antioxidant: 0-0.5%;Ultraviolet absorber 0-0.5%, solve the current market commonly used female sports underwear hot melt film elastic band rebound is not good, not soft enough and without skin feeling, skin quality, Q feeling problem.The hot melt film of the application has high tensile rebound elasticity, super-soft, strong skin feeling, good Q elasticity;The hot melt film of the application is used for the lamination of sports underwear fabric, has good bonding strength, washability, service lamination, the application has high tensile rebound elasticity, so that underwear hot melt film has good tensile rebound performance.

The application provides a low-compression-permanent-deformation rare earth modified EPDM rubber and a preparation method and application thereof, and comprises EPDM, rare earth core-shell particles, IL, sulfur, phenolic resin crosslinking agent, BMI, accelerator, antioxidant, paraffin oil, carbon black, stearic acid and processing aid. The application adopts a "one-step in-situ modification-mother rubber dilution-low-temperature mixing-common two-stage vulcanization" process, realizes uniform dispersion of the rare earth particles in the EPDM matrix, avoids agglomeration and frosting, the product has a CS value of 5.8%-7.8% under the condition of 100 DEG C * 70h / 25% compression, which is far lower than the existing 25%-35% and meets the requirement of ≤10% in high-end scenes, the CS retention rate is ≥90% after aging at 150 DEG C * 168h, and there is no rebound phenomenon; and the application is outstanding in balanced and stable mechanical properties, high and low temperature resistance and anti-aging performance, processing and use stability and the like, has strong industrialization feasibility, the process has low energy consumption and can be produced on a large scale, expands the application of the composition in the high-end sealing field, and meets the strict use requirements in scenes such as fuel cells, LNG equipment and spacecraft.

This invention discloses a polypolyester derivative vulcanized EPDM rubber material and its preparation method, aiming to solve the problems of oxygen inhibition, insufficient vulcanization of the outer surface, and point-like bubble defects, as well as increased oxygen removal costs, that occur in existing peroxide-vulcanized EPDM under bare vulcanization in a vulcanizing tank without oxygen removal, as well as the resulting increased oxygen removal costs. This material uses one of two alternative formulations by weight, including EPDM rubber, carbon black, silica powder, paraffin oil, activator, antioxidant, dispersing and tackifying resin, polyethylene wax, and a polypolyester derivative vulcanizing agent; the vulcanizing agent has a repeating unit structure of formula (I), where n is 3-6, the number average molecular weight is 400-1000, and it is a powdered solid. The preparation method employs a two-stage mixing process: in stage A, the mixture is discharged at approximately 130°C and left to stand; in stage B, the vulcanizing agent is added at no higher than 100°C, the mixture is extruded, and vulcanized at 170°C. This invention results in a smoother appearance, reduced risk of surface bubble defects, and better processing stability under bare vulcanization conditions without oxygen removal.

This invention relates to the field of thermal management system technology, and more particularly to a compound rubber, its preparation method, and a switching valve. The compound rubber is used to prepare sealing gaskets for valve components that flow coolant. The compound rubber is prepared from raw materials comprising the following components: 45.15wt%–54.25wt% EPDM rubber; 16.32wt%–23.79wt% carbon black; 17.86wt%–25.05wt% paraffin oil; 2.11wt%–4.66wt% zinc oxide; 0.85wt%–1.72wt% stearic acid; 2.25wt%–4.75wt% tackifying resin; 2.5wt%–4.66wt% antioxidant; and 5.09wt%–7.36wt% peroxide vulcanizing agent. The compound rubber provided by this invention exhibits superior resistance to compressive stress.

The application relates to the technical field of shock-absorbing foaming materials, and particularly discloses a novel TPE shock-absorbing foaming material and a preparation method thereof. The novel TPE shock-absorbing foaming material is obtained after pre-mixed material is subjected to open mixing and mold foaming forming, the pre-mixed material is a mixture of a base material, a filler and an additive, the base material is obtained by mixing SEBS powder, EVA foaming material powder and mineral oil and then standing and aging, and the additive comprises a foaming agent, dicumyl peroxide, zinc oxide and zinc stearate. When production is carried out according to the formula process of the application, the total amount of mineral oil that needs to be absorbed by SEBS powder in the oil filling process is reduced, and the mineral oil mainly composed of naphthenic oil reduces the difficulty of SEBS powder absorbing paraffin oil, so that the time required in the oil filling process can be fully reduced, and the production efficiency of the TPE shock-absorbing foaming material can be fully improved.