18results about How to "Fast vulcanization" patented technology

The invention discloses extrusion-head in-situ rapid high-crosslinking low-compression permanent deformation conductive silicone rubber and a preparation method thereof. The conductive silicone rubber is prepared from the following raw materials in parts by mass: 100 parts of high vinyl silicone rubber, 2-10 parts of high vinyl silicone oil, 10-30 parts of white carbon black, 150-250 parts of coupling agent modified conductive powder, 2-5 parts of a vulcanizing agent and 1-3 parts of an assistant vulcanizing agent. The plunger type extruder is adopted, the raw materials are extruded and then subjected to in-situ rapid vulcanization forming, the formed conductive silicone rubber is high in crosslinking density and low in compression set, the problem that rubber strips of special-shaped complex structures are prone to collapse and deformation is solved, and the extruded conductive rubber strips do not need to be fed into a vulcanization channel for secondary vulcanization. The conductive rubber strip prepared by the invention has excellent electrical property and electromagnetic shielding effectiveness, and is high in mechanical property, good in rebound resilience and good in processability.

The invention relates to a special single-coating type heat vulcanization adhesive for bonding butyl rubber and metal and a preparation method thereof, and the special single-coating type heat vulcanization adhesive comprises liquid rubber, a vulcanizing agent, diphenylmethane-4, 4 '-diisocyanate MDI, epoxy modified phenolic resin, pigment carbon black, fumed silica, titanium dioxide, zinc oxide and an organic solvent. According to the single-coating type heat vulcanization adhesive, the bonding strength of butyl rubber and metal is greatly improved, the bonding performance is excellent, the bonding strength is obviously higher than that of a heat vulcanization adhesive of metal and an elastomer material, the high temperature resistance and salt resistance of a bonding interface are excellent, the peel strength is still kept to be 11 kN / m or above in a salt spray experiment and a boiling water experiment, and the service life of the adhesive is prolonged. The environment resistance such as wear resistance, corrosion resistance and heat resistance is excellent.

The invention discloses a shoe material and a preparation method thereof. The shoe material is prepared from the following raw materials in parts by weight: 15 to 25 parts of natural rubber, 30 to 45 parts of butadiene rubber, 18 to 24 parts of solution polymerized styrene-butadiene rubber, 8 to 15 parts of modified inorganic filler, 5 to 8 parts of lubricant, 5 to 10 parts of antioxidant, 2 to 5 parts of plasticizer, 3.5 to 6 parts of vulcanization accelerator, 2 to 4 parts of anti-aging agent and 15 to 25 parts of modified carbon fiber. By modifying the filler white carbon black and the carbon fiber, the compatibility and bonding strength among the white carbon black, the carbon fiber and the rubber base material are improved, so that the mechanical property, the tear resistance, the wear resistance, the skid resistance, the aging resistance, the corrosion resistance and the elasticity of the shoe material are remarkably improved.

The invention belongs to the field of medical rubber materials, and particularly relates to a vulcanization preparation process of a medical puncture-resistant rubber gasket. A vulcanization preparation process of a medical puncture-resistant rubber gasket comprises the following steps: S1, raw rubber raw material preparation: crushing and mixing raw rubber raw materials to be vulcanized into raw rubber powder, removing impurities, and sieving; the raw rubber raw materials comprise halogenated butyl rubber, polyisoprene rubber and epichlorohydrin rubber; s2, preparing a rubber compound; the preparation method comprises the following steps: preheating an internal mixer to 80-100 DEG C, adding 80-90 parts by weight of raw rubber powder into the internal mixer, and refining at 115-125 DEG C for 5-9 minutes; adding 12-22 parts by weight of a modified composite filler, 2-6 parts by weight of zinc oxide, 1-3 parts by weight of stearic acid, 3-8 parts by weight of a crosslinking auxiliary agent and 0.5-1.2 parts by weight of an anti-aging agent, and mixing for 18-22 min; s3, calendaring and sheet discharging: calendaring and molding the rubber compound obtained in the step (2) to obtain a rubber compound sheet; s4, prevulcanization: putting the rubber compound sheet calendered in the step (3) into a mold cavity of a press vulcanizer, and carrying out under-vulcanization production to obtain a preformed sheet; the preformed rubber sheet in the step (4) and an organic solvent are subjected to cleaning treatment and drying and then put into a vulcanization mold to be subjected to vulcanization forming, the rubber gasket is obtained, the vulcanization temperature ranges from 140 DEG C to 150 DEG C, and the vulcanization time ranges from 3 min to 7 min. In order to solve the problem that the use performance of a medical rubber gasket is affected due to the fact that the medical rubber gasket is needled to fall scraps and is poor in rebound resilience, the invention provides the vulcanization preparation process of the medical needling-resistant rubber gasket.

The invention belongs to the technical field of conductive adhesives, and particularly relates to an ultralow-hardness silver-copper conductive adhesive and a preparation method thereof. The ultralow-hardness silver-copper conductive adhesive comprises the following components in parts by weight: 50-100 parts of liquid silicone rubber, 30-80 parts of a diluent, 1-10 parts of a chain extender, 0.1-5 parts of a heat-resistant agent, 0.1-5 parts of a coupling agent, 0.1-5 parts of an inhibitor and 100-400 parts of conductive filler. The shielding performance of the ultralow-hardness silver-copper conductive adhesive can reach 100 dB, the tensile strength is larger than 1 Mpa, the volume resistivity is smaller than 0.005 ohm.cm, and the hardness is smaller than 30 ShoreA. On the premise that the requirements of products for mechanical strength and shielding effectiveness are met, the ultralow-hardness silver-copper conductive adhesive has lower product hardness, the internal stress of the adhesive to electronic components is greatly reduced, and market requirements are met.

The invention relates to the technical field of plastic materials, and discloses an outdoor anti-aging plastic composite material and a preparation method thereof. The plastic composite material prepared by the invention comprises the following raw materials in parts by weight: 100 parts of rubber elastomer, 2-5 parts of stabilizer, 25-35 parts of plasticizer, 60-100 parts of reinforcing filler and 2-4 parts of modified anti-aging agent, the rubber-plastic elastomer is used as a matrix, and various assistants are added, so that the aging resistance of the plastic composite material is improved; wherein due to the addition of the modified anti-aging agent and the reinforcing filler, not only is the aging resistance of the matrix improved, but also the aging resistance is prevented from being reduced due to migration and precipitation.

The invention relates to the technical field of warehouse logistics systems, in particular to a conveying line suitable for automatic production of rubber materials, which comprises a material mixing and banburying assembly, a vulcanizing and discharging assembly and an electric control module, the electric control module is connected with the material mixing and banburying assembly and the vulcanizing and discharging assembly, and the output end of the material mixing and banburying assembly is connected with the vulcanizing and discharging assembly. The material mixing and internal mixing assembly comprises a first three-dimensional warehouse and a second three-dimensional warehouse, an internal mixer is arranged between the first three-dimensional warehouse and the second three-dimensional warehouse, the discharging end of the first three-dimensional warehouse and the discharging end of the second three-dimensional warehouse are both communicated with the internal mixer, the vulcanization discharging assembly comprises a vulcanization device, and the discharging end of the vulcanization device is communicated with a discharging device. According to the device, through high-automation design, automatic operation of the whole process of grabbing, proportioning, conveying, internal mixing, vulcanizing and packaging of rubber and powder raw materials is achieved, manual intervention is greatly reduced through the integrated production mode, the labor cost is reduced, and meanwhile the production speed and accuracy are improved.

This invention discloses a branched polyethylene and its preparation method. The preparation method of the branched polyethylene of this invention includes the following steps: using an α-diimine nickel catalyst as shown in formula (1) as the main catalyst; using at least one selected from aluminoxane, modified aluminoxane, alkylaluminum, alkylaluminum hydrolysate, haloalkylaluminum, arylboron, alkylboron and borate as a co-catalyst, polymerizing ethylene using a polymerization solvent containing a halogenated organic solvent under the conditions of a polymerization reaction temperature of 60-85℃ (preferably 65-70℃) and a polymerization pressure of 0.2 to below 1.2 MPa (preferably 0.3-1.0 MPa) to obtain branched polyethylene. Compared with traditional EPDM, the branched polyethylene of this invention exhibits rapid vulcanization and a significantly shortened T90.

The invention discloses sole rubber for oil-proof shoes as well as a preparation method and an application method of the sole rubber. The rubber is prepared from the following raw materials in parts by weight: 10-15 parts of natural rubber, 85-90 parts of chloroprene rubber, 3.5-4.5 parts of a vulcanizing agent, 0.8-1.2 parts of a vulcanization accelerator, 7-9 parts of a vulcanization activator, 0.4-0.8 part of an anti-aging agent CD, 8-12 parts of solid coumarone, 12-16 parts of a softening agent and 58-62 parts of N220 carbon black. According to the present invention, the external force resistance of the rubber is enhanced, the wear resistance of the rubber is improved, the service life of the outsole is substantially prolonged, the requirements of the service life and the oil resistance are fundamentally met, and the rubber compound has advantages of rapid vulcanization, excellent processing property, simple operation and the like in the sole manufacturing process. The sole is made of chloroprene rubber as a main material, the oil resistance requirement is met, the oil-proof requirement of shoes in an oil environment is met, and the service life of the rubber sole is prolonged by more than two times. And the wearing comfort performance of the rubber sole of the shoe is well ensured.

The invention discloses an insulating material for ultrahigh-voltage cable accessories, and belongs to the technical field of cable accessory materials. The insulating material for the ultrahigh-voltage cable accessory comprises the following raw material components: a rubber base material, a filler composition for adjusting the volume resistivity of the insulating material, an activating agent, zinc oxide, an accelerant composition and a vulcanizing agent composition, wherein the rubber base material is ethylene propylene diene monomer; the filler composition can be prepared from the following components in parts by weight: 40 to 55 parts of filling material, 4 to 5 parts of carbon nano tube and 0.5 to 1 part of graphite micro powder; the filler composition can also comprise the following components in parts by weight: 50-65 parts by mass of a filling material, 2-3 parts by mass of nano zinc oxide and 16-18 parts by mass of copper calcium titanate.

This invention discloses a method for preparing a long-lasting stain-resistant fabric, relating to the field of fabric technology. The long-lasting stain-resistant fabric prepared by this invention comprises, from the inside out, Lycra fabric, foamed rubber, and a stain-resistant film. The stain-resistant film is prepared by reacting hyperbranched polyglycidyl ether with modified cyclodextrin. The modified cyclodextrin is obtained by grafting a hydroxylamine polymer onto mercapto-carboxymethyl-cyclodextrin, which enhances stability and introduces a large number of hydroxyl groups, enhancing hydrophilicity and giving the fabric stain resistance. It also increases the density of the stain-resistant film, thereby enhancing the fabric's tear resistance. The foamed rubber is prepared by vulcanizing and foaming a blend of chloroprene rubber, polyurethane rubber, and fluorinated polyether nitrile. The addition of polyurethane rubber accelerates the vulcanization speed and improves the tear resistance of the foamed rubber. It also tightly bonds the Lycra fabric, foamed rubber, and stain-resistant film, enhancing the fabric's peel strength and extending its service life.

The invention relates to the field of silicone rubber, in particular to silicone rubber and a preparation method thereof. The silicone rubber is prepared from the following components in parts by mass: 100 parts of methyl vinyl silicone rubber raw rubber, 40 to 60 parts of white carbon black, 3 to 12 parts of a structured control agent, 0.3 to 2.0 parts of hydrogen-containing silicone oil, 0.1 to 4.0 parts of polyvinyl silicone oil, 0.3 to 0.5 part of deionized water, 0.01 to 0.5 part of an internal release agent, 0.5 to 5 parts of black color masterbatch, 0.5 to 10 parts of a heat-resistant agent and 0.5 to 2 parts of a vulcanizing agent. The silicone rubber has the advantages of excellent high temperature resistance, low pressure change, oil resistance and good comprehensive performance.

The present invention discloses a vulcanizing device for manufacturing high-vulcanization active rubber tires, which relates to the technical field of tire processing, and specifically comprises a base, the top of the base is connected to a moving seat through a hydraulic telescopic rod 1, a lower mold adapted to the rubber tire is fixed on the top of the moving seat, a fixing hole is provided in the middle of the moving seat, a blocking connection structure is provided below the fixing hole, a groove is provided outside the fixing hole, a limiting ring adapted to the green tire is movably connected in the inner cavity of the groove, and the limiting ring is connected to the moving seat through a hydraulic telescopic rod 2. The vulcanizing device for manufacturing high-vulcanization active rubber tires, through the setting of the airbag structure, during the vulcanization process of the rubber tire, the shaping block can occupy a part of the space in the green tire, reducing the amount of gas required when the vulcanizing capsule squeezes the green tire, so that the gas can quickly contact and squeeze the green tire, thereby increasing the vulcanization speed of the green tire.

In order to solve the technical problems, the invention provides the ketoxime quick-drying neutral silicone door and window sealant and the preparation method thereof, and the ketoxime quick-drying neutral silicone door and window sealant comprises the following main components: alpha, omega-dihydroxy polysiloxane, methyl silicone oil, a modified filler, a compound cross-linking agent, N-methylimidazole, silane coupling agents, an organic tin catalyst and the like. The ketoxime type neutral silicone weather-proof sealant disclosed by the invention can be quickly cured, and has the functions of good adhesion, operability, aging resistance, waterproof sealing and the like. The silicone sealant disclosed by the invention has the characteristic of rapid curing, can meet the requirement of rapid turn-over gluing of door and window factories, and greatly shortens the time of waiting for turn-over construction of the door and window factories.

The application relates to the technical field of rubber preparation, and discloses a multi-component copolymer, a preparation method and application thereof, and halogenated branched butyl rubber, a preparation method and application thereof. The multi-component copolymer has a general formula shown in formula (I): R1, R2 and R3 are polymer chain segments, and the terminal contains a structural unit from a conjugated diene; R1 contains a styrene structural unit and a butadiene structural unit; R2 contains the chain segment shown in the formula; R3 contains the chain segment shown in the formula; wherein, is a styrene chain segment, and X is halogen. The multi-component copolymer is used as a grafting agent to prepare halogenated branched butyl rubber, the saturation degree of the halogenated branched butyl rubber can be improved, the extrusion swelling effect can be significantly reduced, the vulcanization speed, the ozone aging resistance and the air tightness can be improved, and the balance among the aging resistance, the product size stability and the vulcanization processing performance of the high-branched and high-saturation halogenated branched butyl rubber is achieved.

The invention discloses a cable intermediate joint semi-conductive paint spraying device which is characterized by comprising a joint specification scanning device, a conveyor belt, an inspection box, a vulcanization box, a purification device and an industrial personal computer which are connected in sequence, and the industrial personal computer controls all equipment; rotatable mandrels which are continuously arranged and vertically arranged are arranged on the conveying belt, and the mandrels penetrate through a middle hole of the middle connector to fix the middle connector. A paint spraying box is erected on the conveying belt, automatic spraying guns which are continuously arranged are symmetrically arranged on the side wall of the paint spraying box in the movement direction of the core shaft, the automatic spraying guns move up and down in a reciprocating mode, and the movement directions of the two sets of automatic spraying guns are opposite. The intermediate joint is fixed by adopting the vertical mandrel, and paint is sprayed up and down while rotating in the process of spraying semi-conductive paint, so that paint surface deformation caused by contact between a paint surface and a transmission belt can be effectively prevented while the spraying uniformity is ensured, the semi-conductive paint is distributed more uniformly, and the electric field uniformity of the intermediate joint can be ensured.

The utility model discloses a waste tire prevulcanization device which comprises a tank body, a hanging bracket which is distributed along the length direction of the tank body and is used for hanging and stabilizing a tire body is arranged at the upper part in the tank body, and a plurality of blowing discs which respectively correspond to two sides of the tire body H are arranged in the tank body. The side, facing a tire body, of each blowing disc is provided with an annular blowing cover, the other side of each blowing disc is communicated with a channel pipe set, hot air dispersed in the tank body is sucked in a centralized mode through the air suction holes, then the hot air is evenly distributed and conveyed to each blowing disc under the cooperation of the air conveying pipe and the channel pipe set, and under the action of air pressure, the hot air in the tank body is blown out. The blowing disc can carry out continuous and targeted drying and blowing on the radial surface of the tire through the annular blowing cover and the air holes, so that the vulcanization rate of the tire is increased, hot air flow in the tank forms a reasonable internal circulation system through the matched design, the vulcanization quality and the vulcanization efficiency of the tire are improved, and the service life of the tire is prolonged. And meanwhile, the energy loss of operation is also reduced.

The invention provides modified fly ash for reinforcing rubber, a preparation method of the modified fly ash and a rubber material, and belongs to the field of functional fillers for rubber. The modified fly ash comprises the following raw materials in parts by weight: 100 parts of fly ash, 1-6 parts of a microscopic pore-forming agent, 1-6 parts of a first coupling agent, 2-8 parts of a second coupling agent, 2-4 parts of a third coupling agent, 1-5 parts of an accelerant and 6-20 parts of a solvent. The mass parts of the raw materials are reasonably designed according to the effects of the raw materials on the fly ash, so that the fly ash is modified by compounding a coupling agent, adding a microscopic pore-forming agent, an accelerant and other key modes, organic groups are grafted on the surface of the fly ash, the surface structure of the fly ash is changed, rubber is further filled with carbon black, and a good reinforcing effect is achieved. Therefore, the reinforcing effect of the fly ash serving as the rubber reinforcing filler is improved.