563 results about "Raw rubber" patented technology

The invention discloses a preparation method of flame-retardant silicone rubber resistant to long-term thermal aging, and relates to the technical field of high-molecular compound composition anti-aging rubber. The flame-retardant silicone rubber is prepared from the following components in parts by mass: 75 to 100 parts of methyl vinyl silicone rubber raw rubber, 18 to 28 parts of fumed silica, 20 to 35 parts of aluminum oxide trihydrate, 0.5 to 3 parts of platinum flame-retardant synergist, 2 to 5 parts of heat-resistant additive, 1.5 to 2.5 parts of structured control agent, 1 to 2 parts of cross-linking agent, 2 to 10 parts of anti-aging agent and 8 to 13 parts of fluorinated silicone rubber. Through a synergistic flame-retardant system, the silicone rubber disclosed by the invention shows obvious advantages in flame-retardant capability, can reach a higher flame-retardant grade, effectively delays flame propagation, and reduces the risk of fire disasters. The weather resistance of the silicone rubber is remarkably improved due to the ultraviolet absorption function and the anti-oxidation function of the anti-aging agent, so that the silicone rubber can effectively resist ultraviolet rays and oxidation under the long-term outdoor solarization condition, and the performance reduction and the appearance deterioration are reduced.

The invention relates to the field of new energy battery buffer parts, in particular to an anti-static foaming silica gel buffer part for a new energy battery and a preparation method of the anti-static foaming silica gel buffer part. The anti-static foaming silica gel buffer part is prepared by mixing and foaming anti-static mixed rubber, a foaming agent, hydrogen-containing silicone oil, an inhibitor and a platinum catalyst, the anti-static rubber compound is prepared from the following raw materials in percentage by weight: 37-50% of methyl vinyl silicone rubber raw rubber, 38-45% of white carbon black, 8-15% of anti-static filler and 1-3% of hydroxyl silicone oil; the antistatic filler is composed of an antistatic agent and a silane-containing active agent; the antistatic agent is composed of acetylene carbon black and a single-walled carbon nanotube. Under the action of the silane-containing active agent, the acetylene carbon black and the single-walled carbon nanotubes are interwoven to form a stable supporting antistatic skeleton structure, so that static electricity can be effectively conducted, static electricity accumulation is avoided, the structure is kept stable in long-term use, and the compression resilience and antistatic durability of the buffer part are ensured.

The invention relates to the technical field of waterproof coiled materials, and particularly discloses a self-adhesive modified rubber asphalt waterproof coiled material and a preparation method thereof. The self-adhesive modified rubber asphalt waterproof coiled material comprises a surface isolating membrane, an asphalt layer, a reinforcing layer and a bottom surface isolating membrane from bottom to top, and the asphalt layer comprises the following raw materials: regenerated rubber modified asphalt, SEBS, terpene resin, polyisobutene amine, an antioxidant and an ultraviolet light absorber; the surface isolating membrane and the bottom isolating membrane are selected from sand surface isolating membranes, and the thickness of the surface isolating membrane and the bottom isolating membrane is 0.8-1.2 mm; and the reinforcing layer is a long-fiber polyester base reinforcing layer. The tensile strength of the self-adhesive modified rubber asphalt waterproof coiled material is 4.5-5.6 N / mm < 2 >, the self-adhesive modified rubber asphalt waterproof coiled material does not flow or drip at 70 DEG C and does not crack at-30 DEG C, the self-adhesive modified rubber asphalt waterproof coiled material has high use performance, the joint peel strength of the waterproof coiled material is 3.2-4.2 N / mm, the holding power is greater than 15 min, and the self-adhesive property of the waterproof coiled material is improved.

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 relates to the technical field of external insulating materials for power equipment, in particular to silicone rubber, a preparation method thereof and application of the silicone rubber in a composite insulator. The silicone rubber is prepared from the following raw materials in parts by weight: 100 parts of methyl vinyl silicone rubber raw rubber, 5-20 parts of hydrophobic silicon dioxide aerogel powder, 3-15 parts of conductive and heat-conducting filler, 10-30 parts of modified aluminum hydroxide, 15-35 parts of fumed silica, 1-3 parts of a silane coupling agent and 2-5 parts of a structuring control agent, 1-4 parts by weight of a low surface energy auxiliary agent, and 0.5-2 parts by weight of a vulcanizing agent. The silicone rubber provided by the invention integrates long-acting hydrophobic anti-icing, active low-power-consumption ice melting and excellent arc ablation resistance, has long-term stability, and is especially suitable for high-voltage insulators in severe environments such as heavy ice areas and heavy dirty areas.

The invention discloses a novel insulating silicone rubber packaging material with a self-fusion characteristic, high voltage resistance and weather resistance. The material is prepared from raw methyl vinyl silicone rubber, fumed silica as a reinforcing filler, modified vinyl MQ silicone resin as a tackifier, hydroxyl silicone oil as a structure control agent, modified aluminum hydroxide and the like as raw materials, has a self-fusion characteristic, can be autonomously bonded to form a seamless insulating layer through contact pressing of two lap joint surfaces, and has the initial peel strength of 3.5 N / mm and the tensile strength of 95N / mm. The secondary fusion strength retention rate exceeds 90%; the power frequency withstand voltage under the thickness of 2mm is greater than or equal to 45kV, the power frequency withstand voltage under the thickness of 4mm reaches 66kV, and the volume resistivity is gt; and 1 * 10 < 12 > omega.m, which is improved by more than 50% compared with the traditional material. The product gives consideration to both mechanical performance and weather resistance, the thick wing-shaped sheet structure is adaptive to special-shaped equipment and can be installed in an electrified mode, and an innovative insulation protection scheme can be provided for power transmission and transformation equipment.

The invention relates to the technical field of regenerated rubber preparation, in particular to a preparation method of high-performance regenerated rubber based on modified calcium sulfate whiskers and rice husk charcoal, which comprises the following steps: S1, mixing anhydrous calcium sulfate and absolute ethyl alcohol, pouring into a four-mouth bottle, carrying out ultrasonic treatment for 0.5 hour, heating to 80 DEG C while stirring in a water bath kettle, adding a surface modifier, and stirring for 0.5 hour; heating for 5 hours, centrifugally washing, and drying the final product in a vacuum drying oven for 2 hours to obtain the modified calcium sulfate whisker. S2, preparing modified rice husk charcoal; and S3, mixing the modified calcium sulfate whiskers, the modified rice husk charcoal and regenerated rubber by using an open mill, uniformly mixing, putting into a mold, and tabletting by using a press vulcanizer to obtain the high-performance regenerated rubber based on the modified calcium sulfate whiskers and the rice husk charcoal. The industrial by-product calcium sulfate and the agricultural waste rice husk are used as raw materials and have the characteristics of no pollution and regeneration cycle, the high-performance filler is prepared through a green process, and the production cost is reduced while the rubber performance is improved.

The invention provides methyl vinyl silicone rubber. The methyl vinyl silicone rubber is prepared from the following raw materials in parts by weight: 85 to 95 parts of methyl vinyl silicone rubber raw rubber, 27 to 35 parts of modified filler, 0.3 to 1.5 parts of vulcanizing agent, 0.5 to 1.5 parts of assistant crosslinking agent and 0.2 to 0.8 part of bulking agent, the modified filler is prepared from the following raw materials: chitosan, a filler and methacrylic acid, and the dosage ratio of the chitosan to the filler to the methacrylic acid is (25-35) g: 22g: (0.07-0.15) mol; the filler comprises hydroxyapatite and silicon dioxide. The invention also provides a preparation method of the methyl vinyl silicone rubber. The methyl vinyl silicone rubber provided by the invention has excellent tensile strength and damp-heat aging resistance.

The invention discloses a preparation method and application of a desulfurized regenerated rubber grafted polar group material, which utilizes a large amount of free radicals generated by fracture of chemical bonds of a molecular chain of regenerated rubber in a high-temperature strong-shearing desulfurization process, and the polar group is grafted to the regenerated rubber in a specific time window after desulfurization. The free radicals which are not killed can react with glycidyl methacrylate, maleic anhydride or trimethyl ammonium chloride to be grafted to a regenerated rubber molecular chain, initiators such as peroxide do not need to be added, cross-linking side reaction is avoided in the grafting process, and therefore the processing performance of the material is kept. The grafted and desulfurized regenerated rubber can be used for improving the performance of a rubber / filler composite material, the prepared grafted and desulfurized regenerated rubber is added into a butadiene styrene rubber or natural rubber composite material filled with carbon black or white carbon black, the interaction between the rubber and filler is improved through the grafted regenerated rubber, and the mechanical property of the rubber composite material is improved.

The invention relates to a low-smoke flame-retardant ethylene propylene diene monomer composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The composite material comprises the following components: 100 parts of raw ethylene propylene diene monomer rubber, 5-8 parts of a cycloolefin copolymer, 20-25 parts of a modified aluminum hydroxide-magnesium hydroxide flame retardant, 15-20 parts of a phosphorus-nitrogen intumescent flame retardant, 2-5 parts of a melamine modified graphene-layered bimetal hydroxide composite flame retardant and 3-10 parts of a vulcanization system, the vulcanization system comprises 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of an accelerant, 0.5-1.5 parts of sulfur and 1-5 parts of a processing aid. According to the invention, the raw rubber of the ethylene propylene diene monomer is compounded with a small amount of cycloolefin copolymer, so that the smoke formation tendency is reduced from the matrix level, and a ternary synergistic flame-retardant system consisting of the inorganic flame retardant, the phosphorus-nitrogen intumescent flame retardant and the nano composite flame retardant is matched, so that the composite material keeps good mechanical properties at the same time.

The invention relates to the technical field of rubber for shoes, in particular to wear-resistant sole rubber and a preparation method and application thereof.The wear-resistant sole rubber comprises raw rubber and additives, the raw rubber is composed of rare earth butadiene rubber and block type high styrene vinyl solution polymerized styrene-butadiene rubber, the additives comprise a reinforcing filler, a plasticizer, a surface modifier of the reinforcing filler, a peroxide bridging agent, an accelerant of the peroxide bridging agent, an anti-aging agent and an iron ion absorbent, the raw rubber and part of the additives are mixed and then internally mixed to obtain a mixture, then the mixture is subjected to thin-passing after being discharged and then processed into a sample sheet, and the sample sheet is subjected to hot pressing to obtain the high-strength rubber. And spreading the obtained first intermediate, adding a peroxide bridging agent, carrying out triangular bag making and sheet discharging, and vulcanizing the obtained second intermediate in a mold to obtain the wear-resistant sole rubber. The wear resistance of rubber soles with special purpose requirements such as sports shoes and outdoor shoes prepared by the invention is greatly improved, and higher wear resistance requirements can be met.

The invention belongs to the technical field of high polymer materials, and particularly relates to a sizing material composition and a preparation method and application of a rubber compound of the sizing material composition. The rubber composition provided by the invention is prepared from 90 to 110 parts of raw rubber, 3 to 5 parts of an adhesive AS-883, 5 to 8 parts of zinc oxide, 1 to 3 parts of stearic acid, 2 to 5.5 parts of an anti-aging agent, 25 to 35 parts of modified N330 carbon black, 10 to 15 parts of white carbon black, 1.5 to 3.5 parts of aromatic oil, 1.5 to 2.5 parts of a silane coupling agent, 2 to 4 parts of an anti-fatigue agent PL-600, 2 to 3 parts of insoluble sulfur and 2.5 to 5.5 parts of an accelerant. The rubber composition disclosed by the invention has high bonding strength with a composite cord thread and high bonding retention rate after aging, and also has the performance characteristics of high rebound value, good aging resistance and fatigue resistance, high tearing strength and tensile strength and low heat generation. The rubber composition disclosed by the invention is used as the tire body layer hanging rubber of the meridian aircraft tire, and the tire is safer to use.

The utility model discloses a high-strength regenerated rubber bonding force detection mechanism which comprises a supporting cabinet, two supporting plates are fixedly installed on the upper surface of the supporting cabinet, a top plate is fixedly installed on the upper surfaces of the two supporting plates together, and an electric hydraulic push rod and a warning lamp are fixedly installed on the upper surface of the top plate respectively. A through hole is formed in the upper surface of the top plate, and the output end of the electric hydraulic push rod penetrates through the through hole and extends to the position below the top plate. According to the device, the bottom face of the top plate and the upper surfaces of the two supporting plates are fixedly installed, so that the two supporting plates can jointly support the top plate, an electric hydraulic push rod is installed on the upper surface of the top plate, and a through hole is formed in the upper surface of the top plate, so that the output end of the electric hydraulic push rod can freely stretch out and draw back; the electric hydraulic push rod is electrically connected with the controller through the wire, so that a worker can conveniently control the electric hydraulic push rod through the controller, and the bonding plate can ascend at a constant speed.

The application relates to the technical field of rubber sealing materials, and discloses a high and low temperature resistant fluororubber sealing element and a preparation method thereof. The high and low temperature resistant fluororubber sealing element is prepared from fluororubber raw rubber, reinforcing fillers, inorganic fillers, acid absorbents, processing aids and vulcanizing agents, wherein the acid absorbents are prepared from metal hydroxides and metal oxides in a mass ratio of (2-5):(1-3), and the processing aids are prepared from amide flow aids, polyethylene wax and fatty acid metal salts in a mass ratio of (1-2.5):(0.8-2):(0.5-1). The prepared high and low temperature resistant fluororubber sealing element has excellent mechanical properties, high temperature resistance, low temperature resistance and compression permanent deformation performance, and effectively solves the technical problems of easy aging of existing fluororubber sealing elements at high temperatures, large compression permanent deformation and easy brittle cracking at low temperatures. The preparation method adopts a mixing and vulcanization process, the preparation method is simple, and the method is suitable for large-scale production.

The invention discloses an electronic product silicone rubber non-slip mat material and production equipment thereof, and belongs to the field of silicone rubber non-slip mat production. The invention discloses an electronic product silicone rubber non-slip mat material and production equipment thereof, the electronic product silicone rubber non-slip mat material comprises an open mill body, the left and right sides of the top end of the open mill body are fixedly connected with control cabinets, and a roller is arranged between the two control cabinets; through the synergistic effect of the adjusting assembly and the pressing assembly, the shearing force and the fitting degree of rubber on the top of the roller are effectively enhanced, it is ensured that high-viscosity raw rubber is tightly attached to the roller surface, frequent sliding is avoided, the raw rubber rapidly wraps the roller and evenly extends, and then the mixing efficiency is improved; when the two rollers are far away from each other, the pressing blocks can move downwards to press the raw materials at the tops of the two rollers, so that the raw materials are attached to the surfaces of the rollers, the situation that the shearing force is reduced due to the fact that the roller distance is increased is avoided, and the rubber processing efficiency is further improved.

The application discloses a kind of hoses and oil pipe assembly for automobile ABS brake master cylinder, belong to automobile parts technical field.Hose for automobile ABS brake master cylinder includes in turn from inside to outside: inner rubber layer, intermediate framework layer and outer rubber layer;The rubber of inner rubber layer includes: EPDM raw rubber, liquid ethylene-propylene rubber, carbon black N550, white carbon black, antioxidant 445, stearic acid, 14-40B and crosslinking aid TAIC;Intermediate framework layer is made of yarn knitting;The rubber of outer rubber layer includes: EPDM raw rubber, white carbon black, carbon black N550, stearic acid, zinc oxide, insoluble sulfur, accelerator TBZTD and phenolic adhesive resin.The application is applied to the aspect of automobile ABS brake master cylinder connecting pipe, solve the problem that existing ABS brake master cylinder oil pipe for automobile is strong, loud noise, with high temperature resistance, high pressure resistance, good bending resistance, reduce noise characteristics.

The present invention provides a seaweed fertilizer material that allows for easy and inexpensive fertilization and supplemental fertilization of seaweed, as well as enabling the strengthening and reuse of cultivation ropes, a seaweed cultivation facility equipped with this material, a method for manufacturing the seaweed fertilizer material, and a method for cultivating seaweed. [Solution] The seaweed fertilizer material 1 according to the present invention is a seaweed fertilizer material 1 for fertilizing seaweed, and contains raw rubber and shell powder obtained by grinding the shells of marine organisms into powder, and is formed in the form of a sheet or string. The shell powder may be powder from sea urchin shells, and may further contain iron fulvic acid.

The utility model relates to the technical field of desulfurized rubber powder cooling, and discloses a desulfurized rubber powder cooling device for regenerated rubber production, which comprises a shell, a feed port and a plurality of driving motors fixedly connected to the top of the shell, an opening and closing plate arranged at the top of the feed port, and a discharge pipe arranged outside the shell. According to the utility model, the rotating shaft with the stirring plate is arranged in the shell and is driven by the driving motor, then cooling water is fed through the water inlet piece, and after the cooling water enters the water discharging piece from the discharging pipe, the cooling water is matched with the stirring plate to stir desulfurized rubber powder fed into the shell and carry out water cooling; therefore, the desulfurized rubber powder in the sealed shell is cooled in an indirect cooling mode of cooling water, the problem that gas generated by the desulfurized rubber powder is easily diffused to a working environment in a common open cooling mode is solved, and the influence of harmful gas generated by the desulfurized rubber powder on workers is reduced.

The application provides a high-styrene solution polymerized styrene-butadiene rubber and a preparation method and application thereof, and the preparation method comprises the following steps: mixing styrene, butadiene, an initiator, a structure regulator and a non-polar solvent, and performing a polymerization reaction to obtain solution polymerized styrene-butadiene rubber; wherein the structure regulator comprises at least two of t-butoxy sodium, t-amyl oxy sodium, 2,3-dimethyl-3-pentanol sodium and ethylene glycol disodium, and a crown ether. By using the composite structure regulator, the application can prepare a random high-styrene content solution polymerized styrene-butadiene rubber, and the rubber almost does not contain styrene blocks, and the content of vinyl in the rubber can be adjusted by the addition amount of the structure regulator. Therefore, the solution polymerized styrene-butadiene rubber prepared by the application has good strength and hardness due to the high styrene content, and the random microstructure reduces the glass transition temperature and heat build-up of the raw rubber, and is suitable for the manufacturing of high-performance tires such as new energy vehicle tires.

The present invention discloses a method and system for predicting the tensile strength of natural rubber, which belongs to the field of data prediction technology. The method comprises: obtaining raw rubber to be tested; wherein the raw rubber to be tested is prepared from fresh latex of a rubber tree; obtaining measurement data of the raw rubber to be tested; wherein the measurement data of the raw rubber to be tested include initial plasticity value, plasticity retention rate, Mooney viscosity, nitrogen content, acetone soluble matter content, copper ion content and manganese ion content; inputting the measurement data of the raw rubber to be tested into a prediction model, and outputting the predicted tensile strength of the vulcanized rubber of the raw rubber to be tested. The testing method of the present application does not require a variety of special equipment and instruments, and solves the problems of the original testing process having multiple processes, multiple equipment, long time consumption, high cost, environmental pollution and the need for support from professional and technical personnel. The present application can simply, quickly and effectively obtain the tensile strength index value that characterizes the mechanical properties of natural rubber through seven quality indicators of raw rubber such as initial plasticity value.

The utility model relates to the technical field of waste rubber regeneration, in particular to a mixing device for devulcanizing and plasticizing waste rubber, which comprises a mixing barrel, a crushing and stirring component rotatably arranged in the mixing barrel, a driving component vertically and slidably arranged on the mixing barrel, and a lifting component arranged on the mixing barrel and positioned below the driving component, the driving assembly is in transmission connection with the crushing and stirring assembly, the driving assembly drives the crushing and stirring assembly to rotate, the lifting assembly is connected with the driving assembly, and the lifting assembly drives the driving assembly to vertically slide; the motor drives the transmission shaft to rotate so as to drive the crushing cutter arranged at the upper part of the filter screen to crush the waste rubber raw material again, so that the situation that some waste rubber fragments which are not crushed thoroughly influence and reduce the quality and performance stability of regenerated rubber is prevented; an electric push rod is started to drive a moving plate to move upwards, and then a transmission shaft connected through a synchronous rod is driven to move upwards, so that the filter screen is moved to the outside of the mixing barrel, and a worker can conveniently clean the filter screen.

The invention relates to the technical field of tire rubber, and discloses a cord fabric rubber composition containing composite masterbatch and a preparation method of the cord fabric rubber composition. Composite masterbatch is introduced into the rubber composition, and the rubber composition is prepared by mixing natural rubber, liquid regenerated rubber, cracked carbon black and hexamethylenetetramine. Wherein the glass transition temperature Tg of the liquid regenerated rubber is-60 to-50 DEG C, and the oil content of the liquid regenerated rubber is 4-8wt%; the BET specific surface area of the cracked carbon black is 60-100 m < 2 >. G <-1 >, the ash content is 15-25 wt%, and the ZnS content in the ash content is 5-12 wt%. The added composite master batch can effectively replace part of natural rubber and furnace black, the bonding strength and fatigue resistance of the rubber material are improved and the scorching safety area is expanded on the premise of not influencing the mechanical properties of the rubber composition, and the composite master batch is beneficial to reduction of heavy metal emission and carbon emission and improvement of economic benefits.

The invention discloses hydrogenated butadiene-acrylonitrile rubber which is composed of hydrogenated butadiene-acrylonitrile rubber raw rubber, a reinforcing filling system, a protection system, a vulcanization system, a processing aid and a key oil-resistant synergistic enhancement system, and the oil-resistant synergistic enhancement system is formed by compounding fluorine polymer powder and organic montmorillonite. The hydrogenated butadiene-acrylonitrile rubber has the advantages that the hydrogenated butadiene-acrylonitrile rubber has excellent high-temperature aging resistance and balanced physical and mechanical properties, and the resistance of the hydrogenated butadiene-acrylonitrile rubber to various insulating oils such as mineral oil, natural ester and synthetic ester is greatly improved through the synergistic effect of physical obstruction and extension of diffusion paths of the nanosheet layers; the method is especially suitable for rubber products which are required to work stably for a long time in a complex insulating oil medium environment.

The invention discloses low-temperature oil-resistant hydrogenated butadiene-acrylonitrile rubber as well as a preparation method and application thereof, and the rubber is prepared from the following raw materials in parts by weight: 100 parts of hydrogenated butadiene-acrylonitrile rubber, 8-20 parts of a polyether plasticizer, 50-65 parts of carbon black, 5-8 parts of modified nano SiO2, 2-4 parts of an anti-aging agent, 5.8-6.5 parts of a peroxide vulcanizing agent and 2-2.8 parts of a vulcanizing aid. The acrylonitrile content in the hydrogenated butadiene-acrylonitrile rubber is greater than or equal to 37%, and the residual double bond content is not greater than 4.5; through the design of the content of acrylonitrile and double bonds in raw rubber, a low-temperature-resistant plasticizer TP-90B is used as a softener to regulate the rigidity of a main chain structure of the raw rubber with high acrylonitrile content and improve the low-temperature performance, and is matched with modified nano SiO2 to form an organic-inorganic interpenetrating network, so that excellent permeation resistance and diffusivity of vulcanized rubber are ensured, and the oil pressure change resistance is improved; and finally, a peroxide vulcanization system in which a vulcanization aid participates is matched to form a complete cross-linked structure, so that oil resistance and low temperature resistance are realized, excellent medium compatibility with low-viscosity synthetic oil is ensured, good compression set at a low temperature of-40 DEG C is ensured, and a rubber material with long-term heat aging resistance is stable.

The invention relates to the technical field of NBR composite materials, in particular to a low-temperature-resistant wear-resistant NBR composite material and a preparation method and application thereof. The invention provides a low-temperature-resistant wear-resistant NBR (nitrile-butadiene rubber) composite material, which is prepared from the following components in parts by mass: 100 parts of NBR raw rubber, 2 to 6 parts of zinc oxide, 0.5 to 2 parts of stearic acid, 30 to 80 parts of carbon black, 1 to 3 parts of 2-mercaptobenzimidazole, 2 to 12 parts of oleylamine grafted halloysite nanotubes, 0.5 to 2 parts of sulfur and 0.5 to 4 parts of N-cyclohexyl-2-benzothiazole sulfenamide. According to the low-temperature-resistant wear-resistant NBR composite material, the compatibility of the additive and the NBR raw rubber is good, and the blooming phenomenon is avoided.

The application provides a method for preparing phenyl silicone rubber raw rubber by one-pot method, comprising the following steps: (1) adding a siloxane ring body and an end-capping agent to prepare a premix; (2) adding a catalyst to the premix obtained in step (1) to perform a first-stage ring-opening polymerization reaction, and continuously adding a cocatalyst to perform a second-stage ring-opening polymerization reaction; (3) adding a neutralizing agent to the ring-opening polymerization product of step (2) to continuously react to obtain phenyl silicone rubber raw rubber. The ring-opening polymerization reaction is completed in 3-6 hours, further, no gas is released at high temperature, and no adverse effect on the mechanical properties of the silicone rubber is caused. The ring-opening polymerization reaction is carried out by means of drum inert gas and short-range vacuum polymerization technology throughout the whole process, the content of hydroxyl groups can be effectively controlled, and the product distribution width is greatly improved.

The present application relates to a kind of low-temperature-resistant oil-resistant damping rubber composite material for outdoor engineering and its preparation method, belong to damping rubber modification technical field.The low-temperature-resistant oil-resistant damping rubber composite material for outdoor engineering described in the present application is prepared by high-vinyl polybutadiene rubber, butyl rubber, flocculation butyl nitrile rubber / oxidized carbon nanotube composite raw rubber and auxiliary mixing co-vulcanization.The vinyl content of high-vinyl polybutadiene rubber is 83-85%, Mn is 430-470, and the relative molecular mass distribution index is 2.0-2.5.The low-temperature-resistant oil-resistant damping rubber composite material for outdoor engineering described in the present application has a wider damping temperature range, excellent low-temperature damping performance, mechanical properties and oil resistance;Meanwhile, a simple and convenient preparation method is provided.

The invention discloses a high-temperature-seawater-resistant and low-pressure-change fluororubber composition, vulcanized rubber as well as a preparation method and application thereof. The high-temperature-seawater-resistant and low-pressure-change fluororubber composition comprises a raw rubber matrix, a reinforcing agent, an active agent, a compound vulcanizing agent, an accelerant, an assistant crosslinking agent, an acid acceptor and a release agent, the compound vulcanizing agent is a mixture of bisphenol AF and bis (2, 5-dimethyl-2, 5-diphenol); the reinforcing agent is a mixture of carbon black and graphite powder; the acid acceptor is a mixture of high-activity magnesium oxide and calcium hydroxide; and the active agent is active zinc oxide. According to the invention, bisphenol AF and bis 2, 5 are adopted as a compound vulcanization system, activated zinc oxide is adopted as an active agent of the compound vulcanization system, and carbon black and lamellar graphite powder are adopted as reinforcing fillers and are jointly added into fluororubber to act together with other components; the obtained fluororubber composition can make the prepared vulcanized rubber have high strength, high elongation at break, high-temperature seawater resistance and low compression set, and can meet the application requirements of the valve seat ring of the marine butterfly valve.

The invention belongs to the technical field of tubular conveying belts, and particularly provides a tubular conveying belt with low-friction side rubber and a preparation method thereof.The tubular conveying belt with the low-friction side rubber comprises a belt body and the side rubber, and the side rubber covers the side face of the belt body; the edge rubber is prepared from the following raw materials in parts by weight: 80-120 parts of raw rubber, 3-15 parts of zinc oxide, 0.5-3 parts of stearic acid, 30-100 parts of carbon black, 1-5 parts of an anti-aging agent, 0-50 parts of operating oil, 5-100 parts of graphite, 1-20 parts of a slipping agent, 0.2-5 parts of a vulcanization accelerator, 0.5-1 part of a vulcanizing agent and 0-15 parts of tackifying resin. The tubular conveying belt with the low-friction edge rubber has the advantages of being low in friction, high in toughness and long in service life.

The invention discloses a degradable dynamic cross-linked silicone rubber composition and a preparation method thereof, and belongs to the technical field of organic silicon materials. The composition is prepared from the following components in parts by mass: 100 parts of methyl vinyl silicone rubber raw rubber, 10 to 30 parts of dynamic cross-linking agent (siloxane copolymer containing disulfide bonds), 10 to 30 parts of biodegradable block (polycaprolactone-siloxane copolymer), 3 to 10 parts of modified cellulose nanocrystal, 0.1 to 2 parts of photosensitizer (benzophenone derivative) and 0.05 to 0.5 part of platinum catalyst. The dynamic cross-linking agent is an addition product of tetra (3-mercaptopropyl) siloxane and diacrylate siloxane, and the disulfide bond density of the dynamic cross-linking agent is 2-5 mmol / g. According to the invention, through the synergistic effect of the dynamic disulfide bond and the polycaprolactone block, efficient self-repairing and controllable enzymatic / photopromoted degradation of the material at room temperature are realized. After the nanocrystalline of the modified cellulose is introduced, the tensile strength is greater than 8.5 MPa, and the elongation at break reaches 680%.