37results about How to "Improves compression set performance" patented technology

The invention relates to a visual polyhydroxy polymer embolism microsphere and a preparation method thereof, belonging to the technical field of medical treatment materials. The visual embolism microsphere is prepared from functional macromolecules with biocompatibility and a cross-linking agent, namely an iodobenzene compound through cross-linking polymerization and is capable of reflecting or weakening X rays. The invention relates to a novel visual embolism microsphere in the technical field of medical materials and a preparation process of the novel visual embolism microsphere. According to the process, the defect that a contrast agent is added into a traditional surgical embolism process for developing is changed, the surgical risk is reduced, and convenience is provided for treating tumor diseases by virtue of a minimally invasive interventional therapy; the visual microsphere prepared by virtue of the preparation process is capable of reflecting or weakening the X rays and has good flexibility, elasticity and compression deformation property; and meanwhile, a traditional embolism microsphere needs to be dyed so as to guarantee that a doctor can conveniently observe in a surgical process, but the embolism microsphere prepared by virtue of the process is yellow and does not need to be dyed, so that the operation is simple and feasible.

The invention discloses a cold-resisting oil-resisting modified fluorine rubber cable sheath material which comprises the following components in parts by weight: 50-70 parts of fluorine rubber, 15-30 parts of silica rubber, 15-20 parts of fluorine silica rubber, 10-25 parts of pre-swelled organic clay, 15-25 parts of white carbon black, 5-13 parts of ternary nylon, 1-2.5 parts of stearic acid, 3-10 parts of active magnesium oxide, 3-9 parts of rare earth complex, 5-12 parts of calcium hydroxide, 0.5-1.8 parts of polyethylene glycol, 1-5 parts of epoxy octyl stearate, 1-2.5 parts of epoxy triglyceride fatty acid, 4-8 parts of a bisphenol vulcanizing agent, 1-3 parts of an accelerant, 0.5-2 parts of an anti-aging agent MB and 0.8-1.5 parts of an anti-aging agent 4010NA. The cold-resisting oil-resisting modified fluorine rubber cable sheath material disclosed by the invention is excellent in cold resistance and oil resistance and is good in comprehensive property and long in service life when used for manufacturing a cable sheath.

The invention provides cable sheath rubber, which is characterized in that the raw material comprises 100 weight parts of chlorinated polyethylene, 2 to 6 weight parts of organic peroxide vulcanizing agent, 3 to 6 weight parts of sulfurization assisting agent, 0.5 to 1.5 weight parts of antiaging agent, 10 to 30 weight parts of fire retardant and 20 to 40 weight parts of reinforcing agent. The product has high fuel oil resistance, high mineral oil resistance, high resistance to low temperature after aging; the cable sheath rubber can be filled with more filler and has high compression deformation performance and toughness; and the smooth appearance of the rubber has high processing technical performance and high flame retarding performance.

The invention provides a modified rubber V belt made of nano-material, which comprises rubber matrix, vulcanizing agent, accelerators, stearic acid, antioxidant, softener and carbon black, and comprises further nano-zinc oxide and nano-calcium carbonate. The product is made with 2.5 to 10 portions of the nano-zinc oxide and 5 to 50 portions of nano-calcium carbonate on the basis of 100 portions of rubber matrix. Mechanical property, wear resistance, compression set and tearing property of the rubber can be improved obviously and the performance of the finished product is improved with indirect zinc oxide being replaced by the nano-zinc oxide, soft semi reinforcing carbon black being replaced by the nano-calcium carbonate.

The invention discloses a heat-resistant anti-aging cable sheath material, comprising the following raw materials in parts by weight: 30-40 parts of poly-stabilizer-nitrile butadiene rubber, 20-30 parts of hydrogenated butadiene-acrylonitrile rubber, 5-8 parts of magnesium oxide, 8-13 parts of calcined clay, 8-10 parts of calcium carbonate, 2-5 parts of chlorinated paraffin, 0.2-0.3 part of phthalocyanine blue, 14-17 parts of white carbon black, 13-18 parts of organic montmorillonite, 1.5-3 parts of DOP (Dioctyl-Phthalate) softener, 0.7-1.3 parts of accelerant DM, 0.5-1.2 parts of accelerant TMTD and 0.5-0.9 part of sulphur. The heat-resistant anti-aging cable sheath material disclosed by the invention is excellent in heat resistance, abrasive resistance, oil resistance, tear resistance and compression deformation performance, and can be applied to a relatively harsh environment, and the service life is obviously prolonged.

The invention discloses a cold-resistant oil-resistant flame-retardant polyvinyl chloride cable material without pungent smell. The cold-resistant oil-resistant flame-retardant polyvinyl chloride cable material without pungent smell comprises, by mass, 20-25 parts of resin powder, 15-20 parts of plasticizer, 5-10 parts of lubricant, 10-15 parts of carbon black, 8-13 parts of stabilizer, 9-14 parts of polyethylene glycol, 17-22 parts of flame retardant, 7-12 parts of Elvaloy and 16-21 parts of nitrile butadiene rubber powder. The cold-resistant oil-resistant flame-retardant polyvinyl chloride cable material without pungent smell and a preparation method have the advantages that since polyethylene glycol is added into a preparation process, the intrinsic pungent smell of the materials can be eliminated; the plasticizer, the Elvaloy and the nitrile butadiene rubber powder are added into the preparation process, so that the prepared material is resistant to cold and oil; the nitrile butadiene rubber powder is capable of assisting the Elvaloy in preventing the plasticizer from separating out, and the Elvaloy is a non-migrating terpolymer and endows a PVC (polyvinyl chloride) polymer with high durability and high heat stability.

The invention discloses a waterproof oilproof temperature-resistant anti-aging cable material which is prepared from, by weight, butadiene styrene rubber, fluororubber, linear low-density polyethylene, fluorocarbon resin, hydrogen-containing silicon oil, modified kaolin, carbon black, ammonium polyphosphate, glass fiber, vermiculite, triethanolamine, nickel, chromium, calcium carbonate, nano silicon dioxide, ethylene glycol, oxide powder, sulfur, stabilizer, plasticizer, flame retardant and fish oil. The invention further discloses a preparation method of the cable material. The cable material is extensive in raw material source, simple in preparation process, low in production cost and suitable for large-scale industrial production. The butadiene styrene rubber, the fluororubber and the fluorocarbon resin are matched in use and are high in compatibility; sulfur is adopted as a vulcanizing agent to be matched with modified kaolin, the fish oil, the stabilizer, the plasticizer and the flame retardant, so that the prepared cable material has excellent heat resistance, wear resistance, oil resistance, tear resistance and compressive deformation resistance, long service life and wide application range.

The invention discloses a preparation method of a multiscale carbon material/silicone rubber composite material. The method takes expanded graphite as a heat-conducting main body, graphene as a heat-conducting reinforcement and organic silicon rubber as a flexible substrate, and a thermal interface material with better performance can be obtained through performing mixing kneading, degassing, molding and curing on the materials. The heat conductivity of the composite material is 0.68 to 2.98W/m.K, and the modulus of compression of the composite material is less than 1.2MPa (specified compression set Epsilon is equal to 30 percent). The preparation method of the multiscale carbon material/silicone rubber composite material has the advantages that the raw materials are cheap and easy to obtain, the process is simple and the performance is stable, so that the method is adapted to large-scale production.

The present invention provides a synthetic rubber, and relates to the field of rubbers. The synthetic rubber comprises, by weight, 15-25 parts of natural rubber, 10-17 parts of an ethylene propylene diene monomer, 3-7 parts of a phenol resin, 5-10 parts of a titanate coupling agent, 15-25 parts of mineral oil, 5-11 parts of calcium oxide, 3-7 parts of magnesium hydroxide, 2-6 parts of carbon black, 1-4 parts of an anti-aging agent, and 1-3 parts of a vulcanizing agent. According to the present invention, the synthetic rubber has characteristics of good compression deformation performance, good wear resistance, and high practicality.

The invention discloses a polyvinyl chloride cable material resistant to heat and shock. The polyvinyl chloride cable material resistant to heat and shock is prepared from polyvinyl chloride, polyurethane, bisphenol-A polycarbonate, poly (tetramethylene succinate), di (2-ethylbutanoic acid) triuret gylcol ester, 2-ethylhexyl epoxystearate, montmorillonite, ammonium heptamolybdate, kaolin, aluminum hydroxide, magnesium hydroxide whisker, antioxidant, 1-azyl-4-methyl piperazine, tri methylol propane tri methacrylate, bisferrocene-base acetylene and a heat stabilizer. The heat stabilizer is prepared through mixing of rhenium complex, cerous carbonate, tribasic lead sulfate, bisphenol A diglycidyl ether, epoxy butyl stearate, lanthanum stearate, glyzinc, aceticacid,2,2',2''-[(octylstannylidyne)tris(thio)]tris-,triisooctylester, mannitol and 2,5-diphenyl-1,3,4-oxadiazole. The polyvinyl chloride cable material has high strength, heat resistance and shock resistance, is resistant to bending and torsion, and has a long service life.

The invention provides a sealing pad for an engine of an automobile and a method for preparing the sealing pad. The sealing pad for the engine comprises, by weight, 45-58 parts of acrylonitrile-butadiene rubber, 18-22 parts of isoprene rubber, 17-20 parts of styrene butadiene rubber, 2-4 parts of hollow glass micro-beads, 3-5 parts of modified nanometer montmorillonite, 1-3 parts of vulcanizing agents, 0.4-0.7 part of silane coupling agents and 0.3-0.6 part of tert-phenol-formaldehyde resin. The sealing pad for the engine of the automobile and the method have the advantages that the sealing pad is excellent in hardness, permanent compression deformation and aging resistance in oxygen-containing fuel environments; the method is easy to implement, and industrial production can be facilitated.

The invention provides common polyurethane flexible foam. The common polyurethane flexible foam is prepared from the following raw materials: polyether polyol for assisting in improving the tearing and compression permanent deformation performance of polyurethane; the preparation method of the polyether polyol for assisting in improving the tearing and compression permanent deformation performance of the polyurethane comprises the following steps: taking micromolecular polyol with the functionality of 3-4 as an initiator, taking ethylene oxide and epoxypropane as composite monomers, and reacting under the action of a catalyst to prepare the polyether polyol. The polyether polyol has high reaction activity and relatively high ethylene oxide content, and when the polymer polyol is added into other raw materials of common polyurethane flexible foam, not only can the air permeability of sponge be directly improved, but also the use amount of a catalyst in a polymerization reaction process is reduced to the greatest extent, the production cost can be reduced, the obtained polyurethane foam has remarkably improved air permeability, excellent rebound resilience and higher comfort, and the problem that the existing medium-low density polyurethane common soft foam is easy to be stiff in hand feeling is solved.

The invention discloses a preparation method of an aramid fiber/graphene/conductive polymer aerogel composite pressure sensing material. The preparation method comprises the following steps of (1) preparing an aramid fiber solution, (2) preparing an aramid fiber/graphene/conductive polymer monomer solution, (3) preparing aramid fiber/graphene/conductive polymer hydrogel, (4) preparing an aramid fiber/graphene/conductive polymer aerogel initial product, and (5) preparing the aramid fiber/graphene/conductive polymer aerogel composite pressure sensing material. The aramid fiber/graphene/conductive polymer aerogel composite pressure sensing material prepared by the invention is high in conductivity and good in flexibility, and also has high compressive deformation performance and high fatigue resistance.

The invention discloses an elevator roller rubber compound for a vertical elevator. The rubber compound comprises, by weight, 70-100 parts of natural rubber, 0-30 parts of butadiene rubber, 60-100 parts of N-550 carbon black, 0-15 parts of high aromatic oil, 1-3 parts of an anti-aging agent RD, 1-3 parts of an anti-aging 4010 NA, 4-6 parts of indirect method zinc oxide, 0.5-1.5 parts of stearic acid, 1-3 parts of microcrystalline wax ZF-10, 1-3 parts of a dispersing agent AT-A, 3-7 parts of coumarone, 0.1-0.6 part of a scorch retarder, 2-5 parts of resorcinol, 1.0-2.0 parts of insoluble sulfurIS-60, 0.5-2 parts of an accelerant NS, 0.5-1.5 parts of a vulcanizing agent DTDM and 1.5-4 parts of an accelerant HEXA-80. The rubber compound is small in compression permanent deformation and longin fatigue life, and therefore the use requirements under long-time harsh conditions are met.

The invention discloses an NBR rubber material with low compression set and a preparation process thereof, belonging to the technical field of rubber sealing elements. The NBR rubber material is prepared from the following raw materials by mass: 44.15-44.75% of a main rubber body, 1.11-2.43% of a vulcanizing agent, 1.32-1.34% of a vulcanizing aid, 0.88-0.89% of a protective agent, 48.57-49.22% of a reinforcing agent, and 2.65-2.70% of an activator. According to the invention, NBR rubber and various assistants are reasonably selected, so the compression set performance of the rubber material is improved, and the prepared product meets environmental protection requirements; product quality cost is controlled to be within a reasonable range; and through adjustment, the tensile strength of the NBR rubber material is not less than 10 Mpa, a compression set test shows that a compression set rate does not exceed 20% under the conditions of compression of 25% and 150 DEG C * 70 h in ASTM 903, and comprehensive performance is good.