33results about How to "Excellent resistance to ozone aging" patented technology

The invention belongs to the technical field of bridge supports and discloses a height adjustment support and a technique for utilizing the height adjustment support to adjust height. The invention has the main technical characteristics that the height adjustment support comprises an upper seat plate, a rubber bearing plate and a base basin; the base basin is provided with injection agent pipelines with a valve; the injection agent pipelines are connected with an injection-moulding machine by a check valve, a throttle and a flow divider; the injection agent pipelines are internally poured with bicomponent polyurethane rubber are two or more than two; and the injection-moulding machine is connected with a hydraulic sensor. The height adjustment support can lead the height of the girder to reach conformity or meet design requirements by adjusting the height, can adjust height in a stepless and multiple times manner, can measure load force, has simple and convenient construction in the processes of leveling, measuring force and adjusting height, does not need large machines and other jacking equipment and can adjust height with dynamic load.

The invention discloses a runner composition. The rubber composition is characterized by being prepared from the following materials in parts by weight: 100-110 parts of ethylene-propylene-diene rubber, 30-40 parts of nitrile rubber, 0.5-1.5 parts of stearic acid, 0.02-2 parts of paraffins, 2-4 parts of anti-ageing agent MB, 5-10 parts of titanate coupling agent, 15-20 parts of calcium carbonate, 0-1.5 parts of antioxidant and 5-10 parts of butyl acetate. The rubber composition, which is prepared by utilizing ethylene-propylene-diene rubber and nitrile rubber, disclosed by the invention has the advantages of being excellent in oil resistance, wear resistance, ozone ageing resistance, low temperature resistance and the like.

The invention relates to a heat-resisting conveyor belt designed according to the temperature distribution and a preparing method of the heat-resisting conveyor belt. The conveyor belt is composed of a laminated structure of a framework layer, a transition layer, upper covering glue and lower covering glue. According to the using requirement, the parameters of the conveyor belt in the running process are known before design and manufacture are carried out, the temperature distribution of a belt body of the conveyor belt in the running process is tested or worked out, a reasonable belt body structure is designed, any one of EP canvas, nylon canvas and cotton canvas which are small in shrinking amount under the high temperature condition and insensitive in strength to the temperature is selected as the framework layer, the framework layer, the transition layer, the upper covering glue and the lower covering glue are laminated to form a complete belt billet, the belt billet is vulcanized through a vulcanizing machine, and then the heat-resisting conveyor belt can be obtained through cooling and forming after vulcanizing. The heat-resisting conveyor belt is reasonable in structure, the overall using performance of the conveyor belt is greatly improved, the production cost and energy consumption are effectively reduced, and the heat-resisting conveyor belt can be widely applied to coal, mines, ports, metallurgy, electric power, casting, cement, chemical engineering and other industries and places needing materials to be conveyed at a high speed.

The invention provides cross-linked hydrogenated butyronitrile type polyurethane. The cross-linked hydrogenated butyronitrile type polyurethane is formed by cross-linking multifunctional hydrogenated terminal hydroxyl liquid nitrile rubber and isocyanato; and the multifunctional hydrogenated terminal hydroxyl liquid nitrile rubber is obtained by introducing an epoxy group in terminal hydroxyl liquid hydrogenated nitrile rubber and then introducing hydroxyl in part of the epoxy group in a ring opening manner by carboxylic acid. The invention further provides a preparation method of the cross-linked hydrogenated butyronitrile type polyurethane. By the novel cross-linked hydrogenated butyronitrile type polyurethane provided by the invention, the shortcoming that butyronitrile type polyurethane is poor in ageing resistance and not high in mechanical strength is overcome. Measurement of swelling ratio and gel fraction proves that chemical crosslink bonds are introduced in the polyurethane, and owing to introduction of the chemical crosslink bonds, the shortcoming that the mechanical property of the polyurethane is poor at high temperature due to the fact that the polyurethane is lack of the chemical crosslink bonds is also overcome.

The invention relates to a combined insertion sealing rubber strip which is arranged in a unit curtain wall and is of a branched structure. Horizontal protruding branches are arranged on two sides of the upper portion of the combined insertion sealing rubber strip. The combined insertion sealing rubber strip is arranged in a first waterproof interface in a vertical direction of an aluminum alloy section of the unit curtain wall. Compared with the prior art, the combined insertion sealing rubber strip is capable of improving watertightness and airtightness of the unit curtain wall by combination of the sealing rubber strips of different shapes, and has the advantages of convenience in construction, high-speed installation and the like.

The invention discloses a polymer pre-laid waterproof coiled material, and relates to the technical field of waterproof coiled materials. The polymer pre-laid waterproof coiled material comprises a polymer sheet and a polymer adhesive layer, and the polymer adhesive layer is formed on the polymer sheet. By adopting a water-based protective layer, on one hand, the main chain of an organic silicon rubber emulsion molecule is a -Si-O- bond, the organic silicon rubber emulsion molecule is a linear polymer taking a mono-valent organic group as a side group, and the organic silicon rubber has the widest use temperature range in all rubbers and has excellent ozone aging resistance, oxygen aging resistance, light aging resistance and weather aging resistance; on the other hand, the added fumed silica has extremely strong ultraviolet absorption and infrared light reflection characteristics, the aging resistance of a coating can be improved when fumed silica is added into the coating, in addition, silicon-alcohol bonds on the surface and calcium ions in concrete carry out a chemical reaction, the bonding between the pre-laid coiled material and the concrete is enhanced, and a synergistic bonding effect is achieved.

The invention discloses a low-permeability and high-adhesion conductive automobile fuel pipe and a preparation method thereof, and belongs to the technical field of fuel pipes. The fuel pipe comprisesan NBR rubber layer, a THV fluoroplastic layer, an NBR rubber layer, an aramid fiber reinforcing layer and an NBR/PVC alloy layer from inside to outside to achieve the effect of improving the bondingstrength among all the layers of the fuel pipe.

The invention belongs to the technical field of hollow fiber damping materials, and discloses a preparation method of a hollow fiber damping material with lotus root section type air bag adjustment. The preparation method comprises the following steps: preparing a hollow spinning film casting solution; adding the completely dissolved film casting solution into a stirring kettle of a spinning machine for stirring; spraying the film casting solution from a spinning jet of the spinning machine, thus spinning hydrogenated butadiene-acrylonitrile rubber hollow fiber; when the hollow fiber passes through a gel bath tank, clamping and pressing the hollow fiber into long and short lotus root sections through two half retaining ring dies with Venturi short tube-shaped inner cavities, and placing the lotus root sections in clean water for soaking, conversion and phase separation; standing the phase conversion-completed lotus root section type hollow fiber, taking out the hollow fiber, and drying the hollow fiber under a room temperature condition, thus obtaining the hollow fiber damping material. An adjustment method which improves the air bag damping of the hollow fiber damping material has important application value, and the problem that an air bag of the hollow fiber, of which the size is not changed along the axial direction, on the section of the hollow fiber damping material is too simple is solved.

The invention discloses a rubber material. The rubber material is prepared from, by weight, 42-70 parts of ethylene propylene rubber, 65-82 parts of aluminum oxide, 55-90 parts of titanium dioxide, 35-67 parts of graphite, 50-65 parts of carbon fibers, 1-3 parts of vegetable oil and 3-5 parts of resin. The rubber material has remarkable high-temperature resistance, low-temperature resistance, high-voltage resistance, ozone aging resistance, radiation resistance, high gas permeability and solvent resistance.

The invention discloses an ultraviolet-resistant and weather-resistant nylon material for mudguards of automobiles and a method for manufacturing the ultraviolet-resistant and weather-resistant nylon material. The ultraviolet-resistant and weather-resistant nylon material comprises, by weight, 38-49 parts of nylon 66, 24-38 parts of polybutylene terephthalate, 16-32 parts of polydiallylphthalate, 5-10 parts of ethylhexyl hydroxystearate, 12-16 parts of flax fibers, 11-16 parts of dicapryl phthalate, 14-22 parts of pigment soot carbon, 18-34 parts of acrylic powder, 5-10 parts of glycidyl methacrylate, 4-6 parts of phenyl salicylate, 15-25 parts of rutile powder, 4-7 parts of ricinoleamide mea, 3-5 parts of lead fumarate and 5-8 parts of auxiliaries. The ultraviolet-resistant and weather-resistant nylon material and the method have the advantages that the ultraviolet-resistant and weather-resistant nylon material manufactured by the aid of the method is high in mechanical strength and excellent in weather resistance, ozone aging resistance and impact resistance, and service requirements of the mudguards of the automobiles can be completely met.

The invention relates to a positive and negative pressure resistant sealing rubber strip for a unit curtain wall. The sealing rubber strip is used on the unit curtain wall which comprises a unit curtain wall aluminum alloy vertical frame and toughened glass. The unit curtain wall aluminum alloy vertical frame is fixed on the toughened glass and provided with two waterproof structures including an external waterproof structure and an internal waterproof structure. The sealing rubber strip is mounted on the inner side of the internal waterproof structure. Compared with the prior art, the positive and negative pressure resistant sealing rubber strip has the advantages of quick mounting, good water tightness and air tightness and the like.

The invention discloses a control system and a control method of a compression pump for an oxygenerator. Output ends of two same compression pumps are connected through a pipeline; a compressed air confluence outlet is formed in the pipeline; an air discharge opening which can be closed is formed in any one side of the pipeline; the two compression pumps are controlled by a control unit to be alternatively started or simultaneously started and the air discharge opening and the compressed air confluence outlet are controlled to be opened or closed, so that the oxygenerator is normally used in plateau and plain, and moreover the problem that one of the two compression pumps cannot be normally started as the starting speeds do not match or an air path has pressure when the two compression pumps are simultaneously started is solved, and a whole air path system can be normally and safely operated and switched.

The invention discloses an ozone aging resistant carboxyl-terminated telechelic liquid rubber preparation method, which is characterized by comprising the steps of adding a diacid peroxide or diacid azodiisobutyronitrile and a polar solvent into a preparation tank according to a mass ratio of 1: (5-10) to prepare an initiator, and stirring until the diacid peroxide or the diacid azodiisobutyronitrile is completely dissolved, adding a polymerization monomer, a reaction type anti-aging agent and the initiator into a reactor according to a mass ratio of (9.99-9.6): (0.01-0.4): (7-16), removing anupper-layer solvent from a polymerization solution through sedimentation and layering, washing with water, and drying to obtain a carboxyl-terminated telechelic oligomer. The polymerization monomer is butadiene, or the polymerization monomer is formed by mixing butadiene and acrylonitrile. Compared with CTPB and CTBN added with an anti-aging agent in a traditional physical blending manner, the CTPB and CTBN of which the molecular chains are combined with the reaction type anti-aging agent have the advantages that the ozone aging resistance is improved, the self-storage and high-temperature aging resistance are improved, and meanwhile, the aging resistance and the mechanical property of the modified epoxy resin are also improved.

The invention discloses a preparation method of an anti-aging tire rubber powder-based PP thermoplastic elastomer automobile part. The method comprises the steps: selecting tire rubber powder of 60 meshes or below, PP, EPDM, BR, different compatilizer systems and stearic acid SA; uniformly dispersing the tire rubber powder and powdery PP in a kneading machine, adding the mixture into EPDM/BR plasticated rubber at 160 + 5 DEG C, and uniformly mixing to obtain the mixed plastic; and adding various compounding agents into the mixed plastic, and carrying out cross-linking reaction by virtue of a dynamic cross-linking system and strong mechanical shear stress to obtain the anti-aging tire rubber powder-based PP thermoplastic elastomer automobile part. Then performance detection is carried out to obtain the tensile strength, the elongation at break, the compression set, the water resistance, the thermo-oxidative aging hardness change, the tensile strength change rate and the elongation at break change rate; and when the samples are tested and free of cracks under the ozone aging resistance condition, it is shown that the ozone aging resistance is excellent.