45results about How to "Improved scorch resistance" patented technology

The invention discloses a high-temperature-resistant rubber sealing ring for automobiles. The high-temperature-resistant rubber sealing ring comprises the following raw materials in parts by weight: 70-90 parts of ethylene-propylene-diene-terpolymer rubber, 10-30 parts of chloroprene rubber, 1-4 parts of an anti-aging agent, 0.8-1.5 parts of active zinc oxide, 0.2-0.4 part of magnesium oxide, 0.5-1.0 part of calcium oxide, 0.6-1.5 parts of butyltin mercaptide, 30-40 parts of modified kaolin, 10-15 parts of magnesium methacrylate, 1-3 parts of a promoter, 6-10 parts of soybean oil, 1-2 parts of ethyl methacrylate, 40-80 parts of paraffin oil, 0.2-0.5 part of triallyl phosphate, 1.0-1.5 parts of a crosslinking agent BIBP, 0.5-1.2 parts of an assistant crosslinking agent TAIC, 0.3-0.5 part of microcrystalline wax, 2-3 parts of a vulcanizing agent and 0.5-1 part of phthalic anhydride. The sealing ring disclosed by the invention has strong weather resistance, corrosion resistance and ozone resistance, and can be suitable for being used as the high-temperature-resistant rubber sealing ring for the automobiles.

The invention relates to a preparation method of nitrile butadiene rubber for preparing a seal ring of a floating oil seal with high wear resistance. The preparation method comprises a formula and a preparation process, wherein the formula comprises the following components: nitrile butadiene rubber, N-550 carbon black, high-wear resistant carbon black, semi-reinforced carbon black, calcium carbonate, polyvinyl chloride, stearic acid, dibutyl ester, sulfur, accelerant, accelerant TE, accelerant TMTD, anti-aging agent RD, anti-aging agent 4010 and zinc oxide; the preparation process comprises the following steps: adjusting the temperature of a mixing machine to 100 DEG C, keeping the rotational speed at 32 revolutions/min, putting rubber raw material, a filling agent, a softening agent, an acidifying agent, the anti-aging agents and an activator into the mixing machine to mix for 20min, controlling the rubber temperature below 130 DEG C to discharge the rubber, then transferring to an open mill, and cooling extruded sheets to obtain a master batch; and putting the master batch into the mixing machine, adding a vulcanizing agent, blending, mixing, controlling the rubber temperature below 100 DEG C to discharge the rubber to the open mill, then cooling the extruded sheets, standing and curing to obtain the nitrile butadiene rubber for preparing the seal ring of the floating oil seal with high wear resistance.

The invention relates to a rubber composition for preparing external and internal layers of an automotive turbocharged hose. The rubber composition comprises 100 parts of ethylene acrylate rubber, 1.0-3.0 parts of anti-aging agent, 1.0-3.0 parts of processing agent, 10.0-20.0 parts of plasticiser, 50.0-70.0 parts of carbon black, 0.5-1.5 parts of internal releasing agent, 2.0-3.0 parts of vulcanization activator and accelerator and 1.0-2.0 parts of vulcanizing agent. The invention further provides a preparation method for the rubber composition. The rubber composition improves high temperature resistance and oil resistance, reduce compression permanent sets, and is not prone to scorching, good in processing characteristics, and can serve as the external layer and the internal layer of the automotive turbocharged hose.

The invention relates to the use of alkylphenol disulfide accelerators in butyl and halobutyl compounds.

The invention discloses a novel rubber seal ring for an explosion-proof motor, and belongs to the technical field of sealing rings. The rubber seal ring is characterized by comprising the following raw materials in parts by weight: 45-55 parts of neoprene, 10-20 parts of EPDM rubber, 4-6 parts of sulfidation system, 5-10 parts of a coldproof soften flux, 12-18 parts of a reinforcing agent, 5-10 parts of a coldproof assistant, and 2-5 parts of an ozone proof assistant. The rubber seal ring has the advantages that the rubber seal ring is high in ozone resistance, good in low temperature resistant performance, and reliable in sealing; the abrasion resistant capability is reinforced greatly; the product quality is more stable; the service life is prolonged by 200% to rubber seal rings for explosion-proof motors in the prior art.

The invention discloses a calendering grass green rubber foxing adhesive for wear-resistant liberation shoes. The adhesive is prepared from the following components in parts by weight: 85-90 parts of standard rubber, 10-15 parts of butadiene-styrene rubber, 15 parts of high styrene, 2.0-2.4 parts of sulfur, 3.6-4.0 parts of a vulcanization accelerator, 1.8-2.2 parts of stearic acid, 1.8-2.2 parts of activated zinc oxide, 6-8 parts of pine tar, 75-85 parts of argil, 2.0-2.4 parts of an anti-aging agent, 4-8 parts of composite resin DS-B, 8-10 parts of calcium grease, 30-36 parts of light calcium carbonate and 4-6 parts of grass green masterbatch.

The invention relates to an all-steel tread formula with high wear resistance and long mileage and a preparation process of the all-steel tread formula. The all-steel tread formula comprises the following components: 100 parts of base rubber; 45 to 60 parts of super wear-resistant carbon black; 0.5-5 parts of a carbon black dispersant; 1-3 parts of stearic acid; 2.5 to 3.5 parts of zinc oxide; 1-3parts of a homogenizing agent; 1-3 parts of an anti-aging agent; 0-2 parts of tackifying resin; 0.5 to 2.0 parts of protective wax; 1.0 to 1.6 parts of sulfur; 0.6 to 1.5 parts of a sulfenamide accelerator. According to the invention, the carbon black with low heat generation and high wear resistance is adopted; meanwhile, an NR/BR/SBR (natural rubber/polyisoprene rubber/styrene butadiene rubber)three-gel combined system is adopted; the carbon black dispersant capable of participating in the reaction of rubber and carbon black is used, the interaction between rubber and carbon black is enhanced, the aggregation of the filler and the heat generation of the rubber material are reduced, the adverse effect of hysteresis on aging is reduced, and the friction coefficient of the rubber materialis reduced, so that the wear resistance and durability of a tread can be effectively improved.

A power cable comprising: (A) a conductor, (B) an insulation layer, and (C) a semiconductor layer comprising in weight percent based on the weight of the semiconductor layer: (1) 49-98% of a crosslinked olefin block copolymer (OBC) having a density less than (<) 0.9 grams per cubic centimeter (g/cm³), a melt index greater than (>) 1, and comprising in weight percent based on the weight of the OBC: (a) 35-80% soft segment that comprises 5-50 mole percent (mol %) of units derived from a monomer comprising 3 to 30 carbon atoms; and (b) 20-65% hard segment that comprises 0.2-3.5 mol % of units derived from a monomer comprising 3 to 30 carbon atoms; (2) 2-51% conductive filler, the insulation layer and semiconductor layer in contact with one another, is degassed by a process comprising the step of exposing the cable to a temperature of at least 80° C. for a period of time of at least 24 hours.

The invention discloses a graphene-carbon nanotube synergistic high-electrical-property semiconductive shielding material and a preparation method thereof. The graphene-carbon nanotube synergistic high-electrical-property semiconductive shielding material is used for a semiconductive shielding layer of a middle-and-high-voltage power cable. The electrical shielding material comprises the following raw materials in parts by mass: 50-90 parts of an ethylene-ethyl acrylate copolymer, 5-25 parts of an ethylene-octene copolymer thermoplastic elastomer, 5-25 parts of linear low-density polyethylene, 5-10 parts of white oil, 5-20 parts of graphene microchip powder, 5-20 parts of a single-walled carbon nanotube, 15-50 parts of conductive carbon black, 0.5-2 parts of a dispersant, 0.2-1 part of a dispersing aid, 0.5-2 parts of an antioxidant, 0.1-0.8 part of an anti-scorching agent, 0.2-1 part of a metal ion passivator, 0.5-2 parts of a lubricant, 1-2 parts of a cross-linking agent, and 0.5-1 part of an assistant cross-linking agent. According to the graphene-carbon nanotube synergistic high-electrical-property semiconductive shielding material, the graphene and the carbon nanotube are compounded for use, so the use amount of a conductive filler can be effectively reduced, the processability of the material is improved, and the graphene-carbon nanotube synergistic high-electrical-property semiconductive shielding material has excellent conductivity, volume resistivity temperature stability, thermal stability, scorch resistance, surface smoothness and mechanical properties.

The invention relates to a non-slip EVA shoe sole. The EVA shoe sole includes an A material and a B material, the A material comprises the following components, in parts by weight: 8-12 parts of standard natural rubber, 6-10 parts of styrene-butadiene rubber, 12-16 parts of cis-polybutadiene, 12-16 parts of white carbon black, 18-22 parts of EVA, and 3-7 parts of white rubber powder; and the B material includes the following components, in parts by weight: 5-9 parts of white oil, 0.1-1 part of diethylene glycol, 4-8 parts of titanium dioxide, 0.1-0.3 part of stearic acid, 1.2-1.6 parts of PEG4000, 0.8-1 part of an anti-aging agent, 0.1-0.3 part of anti-fog wax, 1.3-1.7 parts of an anti-frost agent, 2-6 parts of active zinc oxide, 0.3-0.7 part of wear-resistant oil, 0.1-0.3 part of tetramethyl thiuram monosulfide, 1.1-1.5 parts of sulfur, 0.1-0.3 part of NS powder, and 1.1-1.5 parts of an anti-yellowing accelerant. The EVA shoe sole has the advantage of lightness on the basis of slip resistance.

The invention specifically relates to an auto-inflatable tire repairing liquid and a preparation method thereof, belonging to the technical field of chemical adhesives. The auto-inflatable tire repairing liquid comprises the following raw materials by weight: 15-30 parts of natural latex, 30-50 parts of an antifreezing agent, 0.5-2 parts of a dispersing agent, 0.5-2 parts of an antioxidant, 10-20parts of distilled water, 0.05-1 part of fumed silica, 0.5-3.5 parts of a surfactant, 10-20 parts of nanocrystalline particles and 15-30 parts of hydroxyl butylbenzene latex, wherein the natural latexhas a solid content of 50-70%. According to the tire repairing liquid of the invention, the hydroxyl butylbenzene latex, the natural latex and the nanocrystalline particles are reacted to instantly form a three-dimensional structural network which instantly blocks a punctured tire; the hydroxyl butylbenzene latex and the natural latex are activated by the surfactant and then filled with the fumedsilica so as to form a network structure which inhibits the flowing of colloids, accelerates a curing speed, improves bonding effect and enhances the sealing performance and impermeability of the tire repairing liquid; and the antifreezing agent further enhances the anti-icing ability of the tire repairing liquid.

The invention relates to an ultrathin water storage device, which belongs to the technical field of water storage devices. The ultrathin water storage device is prepared from the following components by weight percent: 10 to 18 percent of ordinary butyl rubber, 30 to 50 percent of halogenated butyl rubber, 30 to 48 percent of carbon black, 2 to 3 percent of resin, 0.1 to 1 percent of internal releasing agent, and 1.5 to 3.5 percent of flow promoter. The ultrathin water storage device is high in scorching resistance and good in mobility; when in injection production, rubber materials are unlikely to vulcanize early in a short time, a whole mold cavity can be fully filled, and an inferior product is avoided.

The invention discloses a rolling type grass green foxing glue for folding-resistant liberation shoes. The rolling type grass green foxing glue comprises the following components in parts by weight: 85-90 parts of standard glue, 10-15 parts of butadiene-styrene rubber, 15 parts of white carbon black, 2.0-2.4 parts of sulphur, 3.6-4.0 parts of a vulcanization accelerator, 1.8-2.2 parts of stearic acid, 1.8-2.2 parts of activated zinc oxide, 6-8 parts of pine tar, 75-85 parts of argil, 2.0-2.4 parts of an anti-aging agent, 4-8 parts of composite resin DS-B, 8-10 parts of calcium-based grease, 30-36 parts of light calcium carbonate and 4-6 parts of grass green rubber master batch.

The invention discloses a special anti-ageing and low-temperature-resistant modified fluoride rubber sheath material for a ship cable. The material is prepared from fluoride rubber, fluorine-containing acrylate rubber, epoxy acrylate rubber, HNBR, maleic anhydride grafted polyethylene, stearic acid, active magnesium oxide, bisphenol AF, benzyl triphenyl phosphorus chloride, trimethylolpropane trimethacrylate, phenolic resin, carbon nanotubes, stearic acid modified diatomite, calcium silicate, polyaniline nanofiber, magnesium hydroxide, calcium hydroxide, inositol hexaphosphate, epoxidation triglyceride fatty acid, epoxy linseed oil, 2,6-ditert-butyl-p-aminophenol, 2,5-di-tert-butylhydroquinone, nitrosodiphenylamine, butylmercaptooxo stannane and accelerant. The special anti-ageing and low-temperature-resistant modified fluoride rubber sheath material for the ship cable is high in strength, good in anti-ageing performance, excellent in oil resistance and low temperature resistance and capable of meeting use requirements of ship cable sheaths.

The invention discloses a flame-retardant conveyor belt and a manufacturing process thereof. The flame-retardant conveyor belt comprises a cover rubber, an intermediate adhesive and a skeleton material, wherein the cover rubber comprises an upper cover rubber and a lower cover rubber, and the skeleton material is a steel wire rope or a flame-retardant polyester fabric. The manufacturing process comprises the following steps: S1, the preparation of the cover rubber: I, the preparation of a composite flame retardant; II, pre-plasticization; III, cold mixing; IV, granulation; S2, the preparationof the intermediate adhesive: (1) stirring and mixing; (2) grinding; (3) de-aeration; S3, impregnation of the skeleton material and plasticization; and S4 extrusion and lamination of the cover rubber.The flame-retardant conveyor belt has the advantages of good flame-retarding effect, low smoke, low toxicity, safety and environmental protection; in addition, the manufacturing process has the advantages of simple process, easy manufacturing, low production cost and high production efficiency.

The invention discloses a tire high-temperature adhesive, and belongs to the technical field of high polymer materials. The adhesive is prepared from the following components of, in parts by weight:,140-160 parts of xylene, 5-7 parts of dioctyl ester, 25-35 parts of chloroprene rubber adhesive, 15-25 parts of powder butyronitrile, 3-5 parts of carbon black, 18-26 parts of petroleum resin, 4-8 parts of activating agents, 6-10 parts of enhancers, 10-14 parts of fillers, 30-50 parts of complex, 5-7 parts of essence, and 4-6 parts of coloring matter. The formula of the adhesive is mainly composedof liquid organisms, combined with powder butyronitrile and macromolecular resin, and meanwhile comprises complex which is specially prepared, so that the tire high-temperature adhesive has excellentperformance on both mixing complexity of the raw materials and the compatibility of the finished product on different rubber. The abrasion resistance, the elasticity and the flexural property of thesizing material are improved as well, and the adhesive has the advantages of heat resistance, aging resistance, flex and fatigue resistance, low compression deformation and good transverse rigidity due to changing of the fillers.

The invention provides a rubber composition prepared by mixing, per 100 parts by mass of the rubber component comprising at least 50% by mass of a diene-based rubber, from 20 to 150 parts by mass of a filler, and from 0.05 to 30 parts by mass of a compound A which has a specific amidine structure and has a functional group reactive with the diene-based rubber. The rubber composition improves both a high elastic modulus and a low tan δ. The invention also provides a pneumatic tire using the rubber composition.

Crosslinkable, flame retardant insulation compositions having improved resistance to scorch are provided. The compositions are comprised of a base resin, hydrated inorganic filler, coupling agent and stabilizer and formulated with a peroxide/scorch retardant combination, specifically, a combination of α,α′-bis(t-butylperoxy)diisopropyl benzene and 2,4-diphenyl-4-methyl-1-pentene.