597 results about "Butyronitrile" patented technology

The invention relates to the field of friction materials, and discloses a friction material with a stable friction coefficient for an electromagnetic brake and a preparation method of the friction material. An adhesive comprises polysiloxane modified phenolic resin, benzoxazine and butyronitrile rubber powder; the reinforcing material comprises 1414 para-aramid pulp, calcium sulfate whiskers, composite mineral fibers, copper fibers and modified needle-like wollastonite; the friction increasing material comprises macroporous shell activated carbon, friction particles, garnet powder, barite and nano hafnium nitride; the antifriction material comprises graphite fluoride, nylon and composite modified hydroxyl silicate; the composite modified hydroxyl silicate is obtained by modifying hydroxyl silicate with diisocyanate and stearic acid and then compounding silane modified micro-nano calcium carbonate. The friction material provided by the invention is used for improving the braking stability of an electromagnetic brake and reducing equipment vibration.

The invention relates to the field of friction materials, and discloses a high-reliability friction material for an electromagnetic brake and a preparation method of the high-reliability friction material. Raw materials of the friction material comprise benzoxazine, phenolic resin, butyronitrile rubber powder, modified basalt fibers, PBO pulp, ceramic fibers, plant fibers, carbon fiber powder, potassium titanate lamellar crystals, barite, light calcium carbonate, friction particles, wollastonite powder, aluminum-titanium powder, feldspar powder, aluminum oxide, zircon powder, garnet powder, crystalline flake graphite, artificial graphite, flexible graphite and composite metal sulfide. And polymer lubricating material micro powder. The friction material provided by the invention is suitable for a high-temperature and high-humidity environment, the stability of the braking performance of a brake is improved, and the phenomenon that the brake slips due to attenuation of braking torque is reduced.

The invention discloses a preparation device and a preparation process of high-performance carboxylic butyronitrile latex, and relates to the technical field of carboxylic butyronitrile latex preparation.The preparation device comprises a reaction kettle, a feeding pipe is fixedly installed at the top of the reaction kettle, a motor is fixedly installed at the top of the reaction kettle, and a discharging pipe is fixedly installed at the bottom of the reaction kettle; a spiral heating pipe is arranged in the reaction kettle; the anti-adhesion device comprises a reciprocating lead screw, a threaded block, a fixed rod, an elastic telescopic rod, an arc-shaped plate, a connecting frame, a short rod, a rotating plate, a limiting block, a convex block and a groove, the reciprocating lead screw is driven to rotate through rotation of the motor, and the reciprocating lead screw rotates to drive the threaded block to reciprocate up and down; the threaded block reciprocates up and down to drive the elastic telescopic rod to reciprocate up and down, the elastic telescopic rod reciprocates up and down, and the arc-shaped plate reciprocates up and down, so that raw materials are prevented from being attached to the inner wall of the reaction kettle to form a thick layer, and the heating effect of the spiral heating pipe on carboxyl butyronitrile latex in the reaction kettle is affected.

The invention relates to a perfluoro wide-temperature electrolyte for a lithium battery and application thereof, the wide-temperature electrolyte comprises a lithium salt, an additive and a plurality of perfluoro mixed solvents, the electrolyte capable of stably working in a wide temperature range (-80-80 DEG C) is successfully constructed, and the excellent electrochemical performance of the lithium battery at the wide temperature is realized. The electrolyte additive disclosed by the invention mainly comprises one or more of hexafluoroisopropoxy cyclotriphosphazene, 3-(2, 2, 2-trifluoroethoxy) propionitrile, 3-(2, 2, 2-trifluoroethoxy) butyronitrile, 3, 4-fluoroethylene sulfate and 4-trifluoromethyl-ethylene sulfate, and the fluorine-containing additive is good in flame retardant effect, moderate in viscosity, good in system compatibility, good in corrosion resistance and good in corrosion resistance. And a protective film can be formed on the surface of the positive electrode of the lithium battery, so that the high-pressure and high-temperature cycle performance of the battery is improved, the electrochemical performance of the battery is not influenced at all, the self-extinguishing time of the electrolyte is obviously shortened, the flame retardant property and the conductivity are excellent, the overcharge resistance of the lithium ion battery is also obviously improved, and the safety performance of the battery is improved.

The invention relates to the technical field of organic synthesis, and discloses a preparation process of (S)-3-aminobutyronitrile hydrochloride, which comprises the following steps: by taking a compound S1 as an initial raw material, sequentially implementing chlorination, amino protection, cyano substitution and deprotection reaction through four-step continuous reaction (M01 preparation, M02 preparation, M03 preparation and M04 preparation), and finally obtaining the high-purity (S)-3-aminobutyronitrile hydrochloride. The preparation process disclosed by the invention is simple and convenient to operate, mild in reaction condition, stable in yield of each step, high in safety and suitable for industrial large-scale production, and can be used for carrying out standard treatment on the cyanide-containing wastewater, and has a relatively good application prospect.

The invention discloses an ultralow-temperature-resistant hydrogenated butadiene-acrylonitrile rubber tube rubber material and a preparation method thereof, and belongs to the technical field of butadiene-acrylonitrile rubber production. The ultralow-temperature-resistant hydrogenated butadiene-acrylonitrile rubber tube rubber material provided by the invention comprises the following raw materials in parts by mass: 100 parts of hydrogenated butadiene-acrylonitrile rubber, 65-80 parts of carbon black, 2-5 parts of zinc oxide, 1-2 parts of stearic acid, 8-12 parts of a low-temperature-resistant plasticizer, 1-3 parts of a vulcanizing agent, 1-2 parts of an accelerant and 2-5 parts of an anti-aging agent. The preparation method of the ultralow-temperature-resistant hydrogenated butadiene-acrylonitrile rubber tube rubber material comprises the following steps: adding hydrogenated butadiene-acrylonitrile rubber into an internal mixer, sequentially adding carbon black, zinc oxide, stearic acid and a low-temperature-resistant plasticizer, and continuously mixing for 4-5 minutes to obtain the rubber material; transferring the rubber material to an open mill, and adding a vulcanizing agent, an accelerant and an anti-aging agent to obtain a rubber compound; and vulcanizing the rubber compound, taking out the rubber material after vulcanization, and naturally cooling to room temperature to obtain the ultralow-temperature-resistant hydrogenated nitrile rubber tube rubber material.

The invention discloses a normal-temperature curing ablation-resistant coating and a preparation method thereof, the normal-temperature curing ablation-resistant coating comprises a component A, a component B and a component C, the component A comprises the following raw materials by weight: 20-30 parts of epoxy resin, 30-40 parts of liquid nitrile rubber, 27-50 parts of an ablation-resistant filler, 10-20 parts of a heat-insulating functional filler, and 200-300 parts of toluene; the component B is a curing agent; and the component C is a curing accelerator. By selecting the high-performance polymer-based resin material and adding the ablation-resistant filler and the heat-insulating functional filler, the ablation-resistant and heat-insulating coating protection construction of the equipment under the normal-temperature curing condition is realized; the problems of ablation-resistant coating construction and thermal protection when a fragile cover, a launcher and the like in a launching system cannot use a high-temperature curing system ablation-resistant coating are solved. The coating can realize military technology and civil use, and can be widely applied to fire prevention and heat insulation construction of buildings.

The invention discloses a preparation method of high-oil-resistance nitrile rubber, which comprises the following components in parts by weight: 275 parts of soft water, 50-55 parts of butadiene and 45-50 parts of acrylonitrile, wherein the addition amount of butadiene and acrylonitrile is 100 parts; the emulsifier is a dodecylbenzene sulfonic acid and naphthalene sulfonic acid formaldehyde condensate sodium salt composite system, and the dosage of the emulsifier is 2.5-5 parts; the initiator adopts persulfate, and the use amount of the initiator is 0.1-0.5 part; 0.1 part of triethanolamine; the preparation method comprises the following steps: synthesizing butyronitrile rubber cement by adopting an intermittent feeding mode of replenishing a molecular weight regulator in batches and a thermal polymerization process, adding a terminating agent and an anti-aging agent, and degassing, condensing, washing and drying to obtain a high-strength butyronitrile rubber product. The nitrile rubber has the Mooney viscosity ML (1 + 4) 100 DEG C of 90-120, the tensile strength of more than or equal to 27.5 MPa and the elongation at break of more than or equal to 450%, and can meet the application requirements in the fields of automobiles, aerospace, sealing washers and the like.

The invention relates to the technical field of high polymer materials, and discloses a low-temperature-resistant butyronitrile composite material and a preparation method thereof. The butyronitrile composite material comprises the following raw materials in parts by weight: 60-80 parts of nitrile rubber, 25-35 parts of modified hydrogenated nitrile rubber, 1.5-2.5 parts of a vulcanizing agent, 2-3 parts of a vulcanization accelerator, 3-6 parts of a cold-resistant plasticizer, 20-30 parts of carbon black and 2-4 parts of an anti-aging agent. The material is prepared by taking nitrile rubber as a main matrix and adding functional aids such as modified hydrogenated nitrile rubber. The composite material has excellent low temperature resistance while maintaining the comprehensive performance of the nitrile rubber, so that the composite material can be widely applied to the environment needing to adapt to low temperature.

The invention relates to the field of high polymer materials, and particularly discloses a rubber-plastic composite material for a wear-resistant high-pressure air pipe and a production method of the rubber-plastic composite material. The composite material comprises the following raw materials in parts by weight: 100 parts of PVC; 36-45 parts of a plasticizer; 4-6 parts of a stabilizer; 8 to 13 parts of polytetrafluoroethylene; 3 to 6 parts of nano silicon dioxide; 22 to 30 parts of TPU (Thermoplastic Polyurethane); 23 to 30 parts of butyronitrile powder; and 2-4 parts of a lubricant. The production method comprises the following steps: uniformly mixing the raw materials according to the ratio, and extruding and granulating. The composite material has the advantage of high wear resistance.

The invention relates to the technical field of cables, and provides a high-toughness corrosion-resistant medium-voltage power cable, which comprises a conductor, and an insulating layer, a shielding layer, an armor layer and a sheath layer which are sequentially arranged outside the conductor, the sheath layer comprises the following components in parts by weight: 70-100 parts of polyvinyl chloride, 30-40 parts of nitrile rubber, 10-15 parts of a flame retardant, 15-20 parts of a plasticizer, 1-3 parts of an antioxidant, 5-10 parts of a filler, 2-4 parts of a heat stabilizer, 1-3 parts of a compatilizer and 0.5-2 parts of a cross-linking agent; the filler is prepared from the following raw materials in parts by weight: 100 parts of calcium carbonate, 20 to 24 parts of 2-ethylhexyl acrylate and 6 to 10 parts of acrylic acid. According to the technical scheme, the problem of poor corrosion resistance of the medium-voltage power cable in the prior art is solved.

An elastomeric article is formed from a blend of nitrile rubber and polychloroprene rubber. The elastomeric article can be a glove, such as a medical exam glove. The elastomeric article is softer than a conventional nitrile elastomeric article. The elastomeric article is formed from a blended rubber latex emulsion of nitrile and polychloroprene. The blended rubber latex emulsion may be free of sulfur and vulcanization accelerators.

The invention relates to the field of cables, and discloses a flame-retardant impact-resistant cable and a preparation process thereof.The cable sheath layer is prepared from low-density polyethylene, nitrile rubber, ethylene-vinyl acetate copolymer, modified halloysite nanotubes and a flame-retardant additive, the preparation method comprises the following steps: carrying out acylating chlorination on 2, 4-dihydroxyphenyl)-2H-benzotriazole, reacting with 3, 5-di-tert-butyl-4-hydroxybenzylamine to prepare a modified acylating chlorination ultraviolet absorbent, and grafting the modified acylating chlorination ultraviolet absorbent with aminated halloysite nanotubes to prepare the ultraviolet absorbent. The aminated halloysite nanotube is prepared by using gamma-aminopropyl triethoxy silane to modify the aminated halloysite nanotube; the flame-retardant additive is prepared from a flame-retardant intermediate obtained by reaction of diphenyl silanediol and phosphorus oxychloride and phosphonitrilic chloride trimer through a precipitation polymerization method. The added modified halloysite nanotube and flame-retardant additive can endow the cable with excellent mechanical properties, aging resistance, flame retardance and heat resistance.

The invention relates to the field of electric wires and cables, and discloses a high-temperature-oxidation-resistant flame-retardant electric wire and cable and a preparation method thereof.The sheath layer of the electric wire and cable comprises low-density polyethylene, nitrile rubber, natural rubber, ethylene-tetrafluoroethylene copolymer, modified multi-walled carbon nanotubes, modified nano titanium dioxide and auxiliaries; the modified multi-walled carbon nanotube is prepared by reacting an acylating chlorination multi-walled carbon nanotube with a polycyclotriphosphazene derivative; the polycyclotriphosphazene derivative is prepared by reacting hexachlorocyclotriphosphazene with p-aminodiphenylamine and then taking diphenyl dihydroxysilane as a linker; the modified nano titanium dioxide is prepared by the following steps: substituting phenylphosphoryl dichloride with phloroglucinol, then sequentially substituting with 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride and 3-aminopropyltriethoxysilane, and grafting an obtained antioxidant phosphorus-containing coupling agent with nano titanium dioxide. The sheath layer material prepared by the invention has excellent high-temperature oxidation resistance, flame retardance, wear resistance and heat resistance.

The invention belongs to the technical field of high polymer materials, and particularly relates to a disposable butyronitrile wear-resistant glove and a preparation process thereof. The nitrile rubber latex is modified, the modified cellulose and the amidated paraffin are introduced, and through the combined action of multiple components, the wear resistance of the butyronitrile gloves is effectively improved, and meanwhile the tensile strength and the elongation at break are improved.

The invention relates to the technical field of coating agents, in particular to a special butyronitrile glove coating agent applied to a clean room and a preparation method of the special butyronitrile glove coating agent. The ink is prepared from the following raw materials in parts by weight: 10-20 parts of hand feeling resin, 4-10 parts of a hand feeling aid, 3-5 parts of a flatting agent, 1-2 parts of an anti-freezing agent, 5-10 parts of a thickening agent, 2-4 parts of a pH regulator, 2-4 parts of a surfactant, 0.1-0.5 part of a bactericide, 3-6 parts of a wetting agent and 50-60 parts of a solvent. According to the special coating agent for the butyronitrile gloves applied to the clean room, a complex chlorine washing process is replaced, so that the butyronitrile gloves have excellent smoothness and anti-adhesion effect, meanwhile, the stability of a coating is improved, the demolding effect is smooth, and the coating agent has very high practical value.

The invention relates to the technical field of disposable gloves, in particular to disposable antiperspirant butyronitrile gloves and a preparation method thereof. The disposable antiperspirant butyronitrile glove comprises a glove body and an antiperspirant layer attached to the glove body, and the antiperspirant layer is prepared from, by weight, 85-95 parts of carboxyl butyronitrile latex, 3-8 parts of aluminum chlorohydrate, 2-4 parts of modified nanocellulose, 1-2 parts of glycerinum, 0.5-1 part of polyethylene glycol 6000, 2-3 parts of zinc oxide nanoparticles and 0.1-0.3 part of mint extract. The invention also discloses a preparation method of the disposable antiperspirant butyronitrile glove. Through the synergistic effect of the constructed composite emulsion system containing the ACH-PEG nano sustained-release particles and the preparation process of the butyronitrile latex, the balance optimization of the antiperspiration function and the mechanical property of the glove is realized. Compared with traditional rubber gloves, on the basis that the tensile strength is kept, the sweat inhibition capacity is greatly improved.

The application provides a gas purification system for butyronitrile glove production and belongs to the technical field of waste gas purification. The application comprises a treatment tank and further comprises a spraying cleaning assembly and a flow guiding and impurity removing assembly. Large-particle impurities are intercepted through initial filtration by a filter plate, small particles are centrifugally separated by a spiral blade, and then the waste gas is treated in stages by cooperating the spraying cleaning assembly and the flow guiding and impurity removing assembly. The gas is fully contacted with the purification liquid through a temporary storage barrel and a conical cylinder, so that the up-and-down wrapping type purification is realized, the gas-liquid contact area and reaction time are greatly increased, the mass transfer efficiency is greatly improved, and the waste gas is ensured to meet the discharge standard. The device optimizes the contact mechanism in multiple dimensions. On the one hand, the spiral blade guides the waste gas to spiral upward, thereby prolonging the residence time of the waste gas in the treatment tank. On the other hand, the temporary storage barrel and the conical cylinder cooperate to make the gas fully contact with the storage liquid in the temporary storage barrel, the sliding liquid in the conical cylinder and the liquid sprayed by the nozzle in sequence, thereby forming a triple purification path, ensuring that the gas and liquid are fully mixed and reacted, and ensuring the purification effect.

A marine thermal runaway battery test pack disclosed by the present invention comprises a box body, a battery module and a cover plate assembly, sealing is realized through a butyronitrile sealing ring embedded in a sealing groove, the box body is provided with a power aviation plug, and the box body is also internally provided with a safety protection liquid for immersing the battery module. Each battery module is composed of a plurality of simulation battery cells and real battery cells which are connected in series in a module end plate and a module side plate, an aluminum extrusion harmonica-shaped tube is inserted between every two adjacent battery cells, each battery cell is sequentially connected with a copper bar and an overcharge power line through a connecting aluminum bar, then is connected with a power aviation plug and then is connected with a charging and discharging machine, and a water inlet and outlet valve is arranged on the box body. The cover plate assembly comprises thickened transparent acrylic, and an aerosol fire-fighting device or / and a perfluorohexanone capsule sheet is arranged in a cover plate; according to the invention, a fire-fighting measure-free thermal runaway test, a water inhibition overcharge thermal runaway test and a silicone oil inhibition overcharge thermal runaway test can be realized by opening and closing water inlet and outlet valves, and the overcharge thermal runaway test can be realized through an aerosol fire-fighting device or a perfluorohexanone capsule sheet.

The invention relates to the technical field of concrete, and provides ultra-high performance concrete and a preparation method thereof. The ultra-high performance concrete is prepared from the following raw materials in parts by weight: 70 to 80 parts of Portland cement, 15 to 25 parts of silica fume, 5 to 10 parts of limestone, 2 to 5 parts of metakaolin, 100 to 120 parts of quartz sand, 24 to 42 parts of hydroxylated steel fiber, 6 to 24 parts of carboxylic butadiene-acrylonitrile latex, 2.0 to 3.5 parts of a water reducing agent and 15 to 22 parts of water. Through the technical scheme, the problem of poor chloride ion permeability resistance of the ultra-high performance concrete in the prior art is solved.

The invention discloses a novel carboxyl butyronitrile latex reaction kettle sampling structure, and relates to the technical field of sampling, the novel carboxyl butyronitrile latex reaction kettle sampling structure comprises a reaction kettle body, the top of the reaction kettle body is fixedly provided with a motor, the top of the reaction kettle body is fixedly provided with a feeding pipe, and the output end of the motor is fixedly provided with a stirring blade; a discharge pipe is fixedly mounted at the bottom of the reaction kettle body; the sampling device is arranged on the surface of the reaction kettle body and comprises an electric telescopic rod, a connecting pipe, a fixing plate, a fixing rod, a sealing plate, a sampling opening, a sampling pipe, an L-shaped sliding plate and a limiting plate, the electric telescopic rod is started, and the output end of the electric telescopic rod shrinks to drive the fixing plate to move in the direction close to the reaction kettle body; the electric telescopic rod is fixedly mounted on the outer wall of the reaction kettle body to prevent the L-shaped sliding plate from being touched by mistake, so that the L-shaped sliding plate relieves the limiting of the sampling pipe, and the sampling efficiency is not influenced.

The invention discloses a biodegradable butyronitrile glove and a preparation method thereof.The biodegradable butyronitrile glove has good biodegradability under the condition that the tensile strength, wear resistance and acid and alkali resistance of the glove are kept, and the glove can be used for preparing a glove through metabolism and enzyme effects in the natural environment; the glove can be degraded into organic matters and finally decomposed into natural elements, the problem that the butyronitrile glove is difficult to degrade is solved, and the natural environment is protected.

The invention belongs to the field of fine chemical engineering, and discloses a method for synthesizing 2, 3-dimethyl-2-isopropyl butyronitrile, which comprises the following steps of: adding an organic amine solvent into a high-pressure reaction kettle, adding sodium amide, sodium iodide and a phase transfer catalyst into the reaction kettle under the protection of nitrogen and in a stirring state, stirring for a certain period of time, and reacting for 2-3 hours to obtain 2, 3-dimethyl-2-isopropyl butyronitrile. Dropwise adding a mixed solution of propionitrile and 2-bromopropane into the reactor, controlling the dropwise adding speed and the reaction temperature, continuously reacting for a period of time after the dropwise adding is finished to obtain a reactant solution, cooling the reactant solution, adding water, standing for layering, collecting an organic phase, distilling the organic phase at normal pressure to recover a solvent, and rectifying at reduced pressure to obtain 2, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3-pentanediol. According to the method, the sodium iodide, the phase transfer catalyst and the organic amine have a synergistic effect, so that the reaction time is shortened, and the yield of the product is improved.

The invention belongs to the technical field of hose sealing in the nuclear power field, and particularly relates to a sealing rubber assembly, a preparation method of the sealing rubber assembly and a hose connector sealing structure. 50 parts of nitrile rubber NBR; 10 parts of liquid butyronitrile latex; 5 parts of zinc oxide; 1 part of stearic acid; 2 parts of magnesium oxide; 2 parts of a flowing exhaust agent SC617; 5 parts of phenolic resin HM601; 1.5 parts of an anti-aging agent RD; 1 part of an anti-aging agent 4020; 60 parts of carbon black N660; 6 parts of aromatic oil; 4 parts of a plasticizer dioctyl phthalate (DOP); 1.0 part of sulfur; 0.8 part of an accelerant CBS; 0.8 part of an accelerant DM; the preparation method comprises the following steps: step 1, plastifying BIIR and NBR: plastifying by adopting an internal mixer, and carrying out thin-passing by adopting an open mill to obtain plastified rubber; and step 2, a mixing process: carrying out first-stage mixing and second-stage mixing by adopting an internal mixer to obtain the sealing rubber assembly. The sealing rubber assembly disclosed by the invention has excellent sealing, gas insulation, liquid oil resistance and liquid resistance.

The invention discloses a preparation method of environment-friendly waterborne polyurethane modified butyronitrile latex and application of the environment-friendly waterborne polyurethane modified butyronitrile latex in labor protection gloves. The leather working gloves prepared from the waterborne polyurethane modified butyronitrile latex not only have excellent wear resistance of the butyronitrile latex, but also overcome the limitation of the traditional butyronitrile leather working gloves, and the durability and softness of the gloves are remarkably improved.

The utility model relates to the technical field of butyronitrile glove production, in particular to a butyronitrile glove processing drying and blowing device capable of preventing local temperature from being too high, which comprises a bottom plate, a drying and blowing bin and a collecting mechanism, a drying and blowing mechanism is arranged at the upper end of the bottom plate, the drying and blowing bin is arranged at the upper end of the bottom plate, and the collecting mechanism is arranged at the lower end of the drying and blowing bin. Filter screens are installed at the front end and the rear end of the drying and blowing bin in an embedded mode, clamping grooves are symmetrically formed in the two sides of the drying and blowing bin, a moving mechanism is arranged at the upper end of the bottom plate, third connecting rods are symmetrically connected between the drying and blowing mechanism and the moving mechanism, and a collecting mechanism is arranged at the upper end of the bottom plate. A moving mechanism is arranged, in the using process, a second connecting block drives a first connecting rod to move and drives a gear to move at the same time, and when the gear is connected with a gear block in a meshed mode, the gear is driven to rotate on the side edge of the first connecting rod, so that the butyronitrile gloves clamped by a clamp rotate, and the butyronitrile gloves are evenly dried; the over-high local temperature of the butyronitrile glove is avoided.

The invention discloses a preparation method of 2-hydroxy-4-(methylthio) butyric acid, and belongs to the technical field of chemical engineering, 2-hydroxy-4-(methylthio) butyronitrile and acidic resin are subjected to a hydration reaction and a hydrolysis reaction, then extractive distillation treatment is performed to recover an extraction agent, and the product 2-hydroxy-4-(methylthio) butyric acid is obtained; according to the invention, the acidic resin is used for replacing free acid, so that the corrosion to equipment is reduced, the possibility of side reaction between concentrated acid and 2-hydroxy-4-methylthio butyronitrile is avoided, the content of impurity polymers is obviously reduced, and the yield of a main product reaches 99.8% or above; the generated resin ammonium salt is about 50% less than the inorganic ammonium salt generated by using free acid, so that the post-treatment cost is reduced; through the process method provided by the invention, the prepared 2-hydroxy-4-methylthiobutyric acid is high in purity, the content of impurities such as residual solvent and resin ammonium salt in the product is low, and efficient separation and purification are realized.

The invention discloses a white high-transparency and high-durability butyronitrile glove and a manufacturing method thereof, and relates to the technical field of glove manufacturing. The glove is prepared from the following raw materials in parts by weight: 100 parts of nitrile rubber latex, 1.0-2.0 parts of a stabilizer, 0.8-1.5 parts of a vulcanizing agent, 1.0-2.5 parts of an active agent, 0.3-1.4 parts of an accelerant, 0.0-2.0 parts of an anti-aging agent, 0.0-3.0 parts of a titanium dioxide agent and 45-55 parts of soft water. The coagulant comprises the following raw materials in parts by weight: 10.0-25.0 parts of calcium nitrate, 1.0-2.5 parts of a separant, 0.1 part of a wetting agent and 2.0-5.0 parts of soft water. The invention further provides a preparation method, and the prepared white high-transparency high-durability butyronitrile gloves are more comfortable and more durable than common butyronitrile gloves, and are more pleasant in mood when being used. Specific example data prove that compared with common butyronitrile gloves which can be broken after being worn for 1-4 hours, the high-transparency and high-durability butyronitrile gloves are still not damaged after being worn for 12 hours.

The invention relates to the technical field of adhesives, and particularly discloses an adhesive for repairing a glass fiber reinforced plastic pipeline and a preparation process. The invention relates to an adhesive for repairing a glass fiber reinforced plastic pipeline. The adhesive is prepared from the following raw materials: modified bisphenol A epoxy resin, a curing agent, a glass fiber reinforced filler, a silane coupling agent, phenyl glycidyl ether, hydroxyl-terminated nitrile rubber and an antioxidant 1076, the modified bisphenol A type epoxy resin is prepared by grafting and modifying bisphenol A type epoxy resin through amino-terminated polyether; the glass fiber reinforced filler is prepared from hydroxylated glass fibers and a graphene-carbon nanotube compound through covalent grafting. The adhesive can be used for emergency repair of glass fiber reinforced plastic pipelines, has the advantages of high low-temperature curing speed, high bonding strength and good durability, can effectively avoid cracking and leakage of repaired parts, and is adaptive to low-temperature and high-pressure complex repair working conditions. The preparation process is simple and convenient to operate and high in controllability, the adhesive with uniform performance can be stably prepared, and the repair efficiency and repair quality are guaranteed.

The invention provides a preparation method of 1, 4-butanediamine. The preparation method comprises the following steps: carrying out a first hydrogenation reaction on a succinonitrile solution and hydrogen under the catalysis of a first catalyst to obtain a first hydrogenation reaction product; carrying out second hydrogenation reaction on the first hydrogenation reaction product and hydrogen under the catalysis of a second catalyst to obtain 1, 4-butanediamine; wherein the first catalyst is a nickel-based catalyst loaded on Al2O3, and the second catalyst is a noble metal catalyst loaded on C. According to the present invention, the step-by-step hydrogenation method is adopted, the corresponding catalyst is utilized, the hydrogenation depth is controllable, the amino butyronitrile is mainly generated in the first step, and the 1, 4-butanediamine is prepared through the further hydrogenation in the second step, such that the side reaction can be effectively reduced, the produced by-product is less, the separation difficulty is low during the post-treatment, and the product purity is high. The method does not need to add other components such as ammonia gas to inhibit side reaction, and is simple in industrial process flow and easy to popularize and use.