915 results about "EPDM rubber" patented technology

A low odor grip is disclosed for a handle of a hand-held implement such as a sports implement or a manual or electric tool which is essentially free of disagreeable odors, which can be installed and quickly shrunk into a tight vapor resistant grip within a matter of a few minutes rather than requiring extended periods of time, and can be installed without the need for any application of heat or use of special tools, equipment or materials. The present device is therefore easy to install, merely sliding over the handle while in dilated state and then allowed to shrink and set by evaporation of the solvent, and thus can be satisfactorily installed in both fabrication facilities and in the field either as an original or replacement grip. The invention also includes an implement fitted with such grip. Representative implements include sports implements such as golf clubs, tennis racquets, weight bars and fishing poles, as well as tools such as hammers, drills, pliers, shovels, axes, and the like. The grip is preferable made of a swellable elastomeric material, preferably a natural or synthetic rubber. Suitable rubbers include EPDM rubber, neoprene or chlorosulfonate polyethylene (Hypalon(TM)) rubber, of which EPDM rubber is preferred.

The invention discloses a sealing strip which takes EPDM as the host material and the preparing method, which is characterized in that the composition contains the following constituents (expressed by wt percent): EPDM 26 percent, zinc oxide 1-1.5 percent, stearic acid 1-6 percent, polyethyleneglycol 0.5-1.6 percent, hydrafil 10-32 percent, zinc borate 5-16 percent, orthophosphoric lipid 3-16 percent, black carbon 7-20 percent, paraffin oil 7-21 percent, calcium oxide 2-5 percent, sulfur 0.25-0.5 percent and accelerant 0.65-1.5 percent. The invention ensures the mechanical performance and extrusion performance, is convenient for extrusion, adopts the hydrafil, the zinc borate, and a inflaming retarding system; is the most realistic non-halogen inflaming retarding; can produce a lot of crystal water on the surface of the burning substance; can separate the burning substance from contacting oxygen, and then can perform the inflaming retarding effect; can inhibit the gases produced by the burning substance, accordingly does not produce smog.

The invention discloses a cold-resistant rubber cable sheath material and a preparation method. The material comprises chlorinated polyethylene, ethylene-propylene-diene monomer (EPDM) rubber, lead oxide, calcium carbonate, N-isopropyl benzene-N'-phenyl p-phenylenediamine serving as an anti-aging agent, antimonous oxide, magnesium oxide, paraffin hydrocarbon oil, chlorinated paraffin, paraffin, carbon black, settled white carbon black, talc powder, gamma-aminopropyl triethoxysilane serving as a surfactant, dicumyl peroxide serving as a vulcanizing agent and triallyl isocyanurate serving as a co-vulcanizing agent. The low temperature performance of the material is improved by blending the chlorinated polyethylene and the EPDM rubber, and meanwhile, the flame-retardant performance of the rubber sheath material is improved by synergy of the antimonous oxide serving as a flame retardant and the chlorinated paraffin; experiments show that the rubber sheath material can pass low-temperature embrittlement test of 40 DEG C below zero, has excellent low-temperature resistance, has the oxygen index of more than 32 and has good flame-retardant performance; and the preparation method is simple and strong in operability.

The invention discloses an ethylene propylene rubber insulation material for longitudinal high-voltage watertight cables of ships and warships and a production method thereof. The method comprises the following steps: adding the ethylen e-propylene-diene mischpolymere, age resister and fire retardant into a banbury for banburying for 3.5min; adding argil, white carbon black and paraffin wax for continued banburying for 2min; adding active agent, and discharging after banburying for 1.5min; filtering the rubber compound with a three-layer filter screen (namely a 60 mesh filter screen, a 60 mesh filter screen and a 80 mesh filter screen) on a rubber filter; and beating into cornucopla on a double-roller mill, adding vulcanizer and co-crosslinker, then beating into cornucopla for 7 times, grinding and slicing after finishing the steps, and then cooling, wherein the materials are as follows in parts by weight: 100 parts of ethylen e-propylene-diene mischpolymere, 1-5 parts of vulcanizer, 1-4 parts of age resister, 15-70 parts of fire retardant, 0.5-10 parts of active agent, 10-20 parts of argil and 2-4 parts of paraffin. The prepared insulation material has the characteristics of low smoke, no halogen, fire resistance, high machinery strengthen, and high insulation resistance, good flexibility, elasticity and viscosity, and can be used for the ships and warships.

The invention discloses an ultraviolet cross-linking EPDM (ethylene propylene diene monomer) rubber cable insulation material and a preparation method thereof. The method is characterized in that: by weight, 100 portions of EPDM rubber, 100 portions to 120 portions of inorganic filling, 0.5 portion to 5.0 portions of ultrasonic initiator, 0.5 portion to 5.0 portions of polyfunctional cross-linking agent, 5.0 portions to 10.0 portions of softener, 0.8 portion to 1.2 portions of silane coupling agent and 0.01 portion to 1.0 portion of complex antioxidant are evenly mixed and extruded at the temperature of 100 DEG C to 150 DEG C, thereby obtaining the ultraviolet cross-linking EPDM rubber cable insulation material; then the wire core is fused and extruded coating to form an insulation layer or a protective coating; and ultraviolet cross linking is carried out under 200nm to 400nm of wave length and 400mW/cm<2> to 2000mW/cm<2> of light intensity. The cable insulation material has tensile strength of larger than 6.5MPa, elongation at break of higher than 300 percent and volume resistivity of higher 10<12>Omega question mark cm, and can pass a thermal aging test under the temperature of 135 DEG C for 168h.

Processable rubber compositions contain a cured elastomer dispersed in a matrix comprising a thermoplastic material. The cured elastomer is present at a level of greater than or equal to 35% by weight based on the total weight of cured elastomer and thermoplastic material. The thermoplastic material comprises a fluorine containing thermoplastic polymer, and the cured elastomer comprises a non-nitrile rubber selected from the group consisting of acrylic rubber, EPDM rubber, butyl rubber, silicone rubber, butadiene rubber, isoprene rubber, and natural rubber. Methods for preparing the compositions involve dynamic vulcanization of the elastomer and thermoplastic components.

An adhesive composition is provided for adhering together roofing materials such as EPDM rubber and thermoplastic polyolefin (TPO). The adhesive composition includes a rubbery polymer comprising a blend of a thermoplastic block copolymer and a polyisobutylene. The adhesive composition may further include a compatible tackifier and an amorphous polyolefin. The composition is a pressure sensitive adhesive which can be applied to roofing materials in a peel and stick manner and provides a long term, water-tight seal and high bond strength.

The invention discloses a polyolefine sheathing compound for a coaxial cable and a preparation method thereof. The sheathing compound consists of the following components in parts by weight: 60-90 parts of ethylene-propylene-diene rubber, 5-25 parts of high-density polyethylene, 5-15 parts of functional polyolefin resin, 180-200 parts of flame retardant, 1-3 parts of surface modifier, 0.01-0.05 part of crosslinking agent, 0.5-2 parts of antioxidant and 1.5-9 parts of processing aid. The preparation method comprises the following steps of: putting the flame retardant into a high-speed stirrer for stirring at a high speed at the temperature of not lower than 80 DEG C; adding organosilane and stirring for 3-5 minutes; putting the remaining materials into the high-speed stirrer for continually stirring for 3-5 minutes; adding into a double-screw mixing extruder set by using a feeder for pelletizing; and drying. The sheathing compound has the advantages of flame retardance, low smoke, freeness from halogen, low toxicity, freeness from harmful heavy metals such as lead, cadmium and the like, freeness from phosphorus, difficulty in burning and small smog harm in case of fire, environmental friendliness, high temperature resistance level of 105 DEG C, high extruding performance, excellent electric performance, no need of subsequent crosslinking after stranding, saving in a large amount of manpower and materials and great reduction in the manufacturing period of the cable.

The invention relates to a lightweight wear-resistant density-gradient foamed sole material and a preparation method thereof. The lightweight wear-resistant density-gradient foamed sole material is mainly composed of EPDM, ethylene-octene copolymer, low density polyethylene, a cross-linking agent, a filling material, a foaming agent and a foaming promoter. On the basis of foaming of EPDM, POE and LDPE and through control of a foaming ratio and density difference values of each layer of materials, a heterogeneous expandable rubber compound composed of a plurality of layers and having quasi-continuously changing performances in the thickness direction of the materials are subjected to one-shot mould pressing, foaming and moulding so as to prepare the foamed sole material, and function gradient differences of density, hardness and wear resistance are realized. Due to gradual change of density, stress concentration is mitigated, and the prepared foamed sole material does not warp. The foamed material has low density at one side close to the vola while the foamed material has high density at one side close to the outer sole, so the foamed sole material has good wear resistance, reduces the weight of the sole and has improved wearing comfortableness.

The invention discloses an aging-resistant and low-temperature-resistant EPDM (ethylene-propylene-diene monomer) rubber cable material. The material comprises raw materials as follows: EPDM rubber, natural rubber, an ethylene-butene elastomer, superfine talc powder, nano calcium carbonate, modified superfine desulfurization ash, active calcium silicate, zinc methacrylate modified nano silicon nitride, pre-dispersed hollow phenolic microspheres, reinforcing fibers, zinc oxide, stearic acid, dicumyl peroxide, sulfur, N,N'-meta phenylene bismaleimide, diphenylmethane bismaleimide, DIPDIS, coumarone-indene resin, APP (ammonium polyphosphate), ADP, an MPE (metallocene polyethylene) elastomer, N-(4-anilino phenyl maleimide and 2-mercapto benzimidazole. The aging-resistant and low-temperature-resistant EPDM rubber cable material is high in strength, good in aging resistance and low-temperature resistance, excellent in insulating property and flame retardation and long in service life.

The invention discloses a high temperature resistant wire rope core flame-retardant conveying belt, and solves the problem that the conventional wire rope core flame-retardant conveying belt is not high temperature resistant. According to the invention, the sizing material of an upper covering bond layer as well as that of a lower covering bond layer comprise the following ingredients in part by weight: 30 to 50 parts of ethylene-propylene-diene rubber, 25 to 35 parts of chlorinated butyl rubber, chlorosulfonated polyethylene rubber or neoprene, 25 to 35 parts of chlorinated polyethylene rubber, 4 to 6 parts of dicumyl peroxide, 0.5 to 1.5 parts of sulfur, 0.5 to 1 part of tert-octylphenol-formaldehyde resin, 1 to 3 parts of epoxy resin, 8 to 12 parts of zinc oxide and/or magnesium oxide, 1 to 2 parts of stearic acid, 2 to 8 parts of accelerating agent, 2 to 4 parts of antiager, 8 to 15 parts of conductive carbon black, 25 to 45 parts of high abrasion resistant carbon black, 10 to 15 parts of active glass fiber powder, 20 to 50 parts of solid flame retardant, 10 to 20 parts of liquid flame retardant, and 3 to 8 parts of flame-retardant lubricant MB-202. Two glass fiber canvas thermal insulating layers are arranged between a middle bond layer and the upper covering bond layer and between the middle bond layer and the lower covering bond layer respectively. The high temperature resistant wire rope core flame-retardant conveying belt can be used for a long time at the temperature of 250 DEG C, and meets the conveying requirements of special high-temperature materials.

The invention discloses a high fatigue resistance hydraulic brake hose and the producing method thereof, playing the role of transferring brake pressure to drive arrester to make vehicle braking in automobile system, and comprising inner rubber layer, weaving layer, medium rubber layer, weaving layer, and outer rubber layer, where the inner, medium and outer rubber layers are made from EPDM rubber, butyl benzene and butyl EPDM rubber, and neoprene as main raw materials, respectively, and its producing method includes mixing, extruding, weaving, weaving, extruding, removing core after sulfuration and obtaining finished product. And it has characters of peculiar formula of raw materials, easy operation, excellent fatigue resistance, long service life and good use effect.

The invention relates to a manufacturing method of a vibration-isolating rubber bearing for building, which adopts a mould to make internal steel plates and internal rubber by pressing to form an internal rubber and internal steel plate composite layer and an internal rubber, internal steel plate and internal rubber composite layer, and the size is precise and the thickness error is 0.05mm. The invention solves the offset problem of the internal steel plates, and simultaneously no residual rubber is removed; no air is generated in the process of curing mold, so no air needs to be exhausted. Since the rubber protective layer of the vibration-isolating rubber bearing for building adopts an injection rubber process, the rubber protective layer of the vibration-isolating rubber bearing for building can adopt more anti-aging special rubber different from the internal rubber, such as EPDM rubber, halogenated butyl rubber, mixing polyurethane rubber and the like, thereby improving the quality and service life of products.

The invention discloses a building sealing strip based on a thermoplastic ethylene-propylene-diene monomer (EPDM) rubber material. The building sealing strip comprises the following components in part by weight: 30 to 50 parts of EPDM rubber, 15 to 40 parts of polypropylene, 2 to 10 parts of cycloalkane rubber oil, 2 to 10 parts of paraffin oil, 5 to 20 parts of phosphate, 2 to 10 parts of talcpowder, 5 to 20 parts of aluminum hydroxide, 0.2 to 1 part of antioxidant, 0.2 to 1 part of ultraviolet resisting agent, 0.5 to 2 parts of vulcanizing agent, 1 to 5 parts of auxiliary vulcanizing agent,5 to 10 parts of zinc borate, 2 to 5 parts of polytetrafluoroethylene powder and 0.5 to 5 parts of coloring agent. The other aim of the invention is to provide a preparation method of the building sealing strip based on the thermoplastic ethylene-propylene-diene monomer (EPDM) rubber material. The method comprises the following steps of: weighing raw materials, blending, reacting and extruding with a double-screw extruder, and plasticizing and extruding with a single-screw extruder. The performance requirements of the building sealing strip are met; and the building sealing strip has certain burning resistance, is low-smoke, halogen-free and environment-friendly, and can be recycled. The building sealing strip is suitable for a building door window curtain wall.

The invention provides a halogen-free full fogging face polyurethane composition which comprises the following components in parts by weight: 30-60% of thermoplastic polyurethane, 5-25% of a fogging agent, 0-2% of a vulcanizing agent, 0-15% of a graft, 0-25% of a softener, 1-3% of a delustering agent, 0.1-0.5% of an antioxygen agent and 0.1-3% of a processing agent, wherein the fogging agent is one or a composition selected from SEBS, SEPS, crylic acid ester rubber, EPDM rubber, NBR or POE. The halogen-free full fogging face polyurethane composition has the excellent characteristics of environmental protection, innocuity, full, high temperature resistance and the like, and is suitable for preparing flexible electric wires.

Disclosed is a thermoplastic elastomer composition comprising 100 parts by weight of EPDM rubber, 5-1,000 parts by weight of styrenic thermoplastic elastomer, 50-3,000 parts by weight of paraffin oil, 10-200 parts by weight of a polyolefin resin as a curative, 1-15 parts by weight of a phenolic resin, and 0.5-5 parts by weight of a curing activator. The composition is superior in flowability, mechanical properties and oil resistance as well as being low in hardness, so that it can be applied for automobile parts.

A silicon resin filled EPDM heat insulation material is prepared from, by weight, 100 parts of EPDM rubber, 20-60 parts of silicon resin, 3-20 parts of a metallic compound, 15-20 parts of a fortifier, 8-15 parts of organic fibers, 8-12 parts of tackifying resin and 3-12 parts of other auxiliaries.An appropriate amount of silicon resin and metallic compound are added into the EPDM heat insulation material, a molten silicate sticky liquid membrane is generated in situ by means of high-temperature pyrolysis and reaction, the molten silicate sticky liquid membrane is attached to the surface of a cracked solid residue, a solid network structure is formed by the solid residue in a physical crosslinking mode through adhesion action of the liquid membrane, self-supporting capacity and the function of resisting outer scouring of a heat insulation carbonizing layer are added, and scouring resistance and ablation resistance of the heat insulation material are effectively improved.The rubber type heat insulation material can be used in an engine, widely used for manufacturing porcelainized wire and cable materials and widely used in other fields needing fire prevention and flame retardance.

An automobile weather strip has a trim part having a substantially U-shaped section and a sealing part. The automobile weather strip is characterized in that: the trim part has an insert member and a covering material for covering the insert member; the covering member is provided with holding lips for holding a flange part on an inner surface of the trim part; a sponge material of a rubber formed by using a blend material of an EPDM rubber and an olefin-based thermoplastic synthetic resin and a sponge material of a rubber having physical properties of a specific gravity of 0.6 to 0.8 and a 25%-stretching stress of 500 KPa or more are used as the covering material.

A rubber-based thermal insulation layer patching method belongs to the solid rocket motor thermal insulation layer manufacturing method, and solves the problems of long construction period, high labor intensity, inconvenient operation and the like of a solid rocket motor with the diameter Phi of Phi 100mm-1400mm, using nitrile, EPDM rubber and other materials as a thermal insulation layer material; at the same time is able to meet production requirements of a thermal insulation layer material of a charging combustion chamber of a solid rocket motor with small front and back opening sizes and large length. The method includes a preliminary step, a gluing step, a patching step, a hot prepressing step, a fault detection step and a curing step. The method is successfully applied to multiple products, the thermal insulation layer fully meets the design requirements; process cycle is reduced by 67%, labor productivity is increased by at least 1 time, lower labor cost is reduced by at least 50%, raw material cost can be reduced by 15%; the operating environment is significantly improved, and a guarantee is provided for the prevention of occupational diseases.