411results about How to "Shorten vulcanization time" patented technology

The invention discloses a high temperature resistance non halogen flame retardant cable sheath material and a preparation method thereof. The high temperature resistance non halogen flame retardant cable sheath material comprises the following components with the following parts by weight: 100 parts of ethylene-propylene-diene monomer (EPDM), 1.5-6 parts of vulcanizing agent, 1.5-6 parts of co-vulcanization agent, 0.5-5 parts of coupling agent, 4-20 parts of antiager, 4-30 parts of softener and 80-250 parts of inflaming retarding filling agent. In the invention, the halogen-free material is adopted, thick smoke, corrosive halogenide gas and other harmful substances are not generated in the process of burning; the cable sheath of the invention features excellent elasticity and tenacity, not only has obvious inflaming retarding effect, but also improves heat-resisting and anti-aging properties, can resist high temperature, and has high mechanical strength and wide application range; in addition, the production process is easy and is convenient for rubber-producing enterprises to achieve self-sufficiency.

The invention provides a less-harmful nontoxic rubber vehicle sealing strip which has excellent processability and physical properties and belongs to an environment friendly sulfidizing system. Main raw materials are as follows: 200 plus or minus 10 portions of ethylene propylene diene methylene, and 150 plus or minus 10portions of carbon black; 20 plus or minus 2 portions of light super fine calcium carbonate and 30 plus or minus 3 portions of talc as fillers; 20 plus or minus 2 portions of high-flash paraffin oil or styrene/Alpha-methyl styrene/vinyl toluene terpolymer as a softener; 10 plus or minus 1 portions of aluminum hydroxide as a flame retardant; 5 plus or minus 0.5 portions of zinc oxide and 2 plus or minus 0.2 portions of stearic acid as active agents together; 4 plus or minus 0.4 portions of polyethylene glycol of a hydroxyl polar group as an additive; 5 plus or minus 0.5 portions of calcium oxide as a neutralizer; 4 plus or minus 0.4 portions of nitrogen-free sulfidation material which is mainly sulphur; and 0.3 plus or minus 0.03 portion of Alpha-tocopherol as an inhibitor. The less harmful nontoxic rubber vehicle sealing strip can not only reduce environmental pollution, but also maintain reasonable cost.

PCT No. PCT/JP97/03212 Sec. 371 Date May 8, 1998 Sec. 102(e) Date May 8, 1998 PCT Filed Sep. 11, 1997 PCT Pub. No. WO98/11161 PCT Pub. Date Mar. 19, 1998A rubber composition for a tire comprising: 100 parts by weight of a starting rubber; 10 to 150 parts by weight of a carbon black; 0.1 to 20 parts by weight of a sulfur; and 40 parts by weight or less of a polysiloxane having the following alkoxysilyl group (I) or acyloxysilyl group (II) and having an average degree of polymerization of 3 to 10,000: 3BOND Si-OR1(I) 3BOND Si-OCOR2(II) wherein R1 is a substituted or unsubstituted monovalent hydrocarbon group or an organic group containing an ether bond and having 1 to 18 carbon atoms and R2 is hydrogen or a hydrocarbon group having 1 to 21 carbon atoms.

The invention relates to a formula of a rubber sole material and an improvement of the preparation method of the rubber sole material. The wear-resisting sole material comprises the following components by weight percent: 50-60% of natural rubber 3L, 3-5% of accelerator, 40-45% of filler, 1-1.5% of hardener and 1.5-2% of vulcanizing agent, wherein the hardener is high styrene; and the acceleratoris the mixture of inorganic accelerator, polyethylene glycol, stearic acid, antioxidant and tackifier and the accelerator also contains organic accelerator which is perferably selected from accelerator D, accelerator M and accelerator DM. The sole material of the invention is prepared from good natural rubber by adding the accelerator with various functions; and the sole prepared from the material has light weight, good wear resistance, water resistance and good heat retention property and is suitable to be used as the sole of the shoe with high wear strength such as tennis shoe and outdoor sneaker.

The application discloses a high-heat-conductive rubber composition, a preparation method thereof and a tyre. The high-heat-conductive rubber composition includes, by weight, 100 parts of rubber, 20-75 parts of carbon black, 0-25 parts of white carbon black, 0.1-10 parts of carbon nano tubes, and 0.1-10 parts of graphene. The tyre, on the basis of original processing performance and conventional physical performance maintained, is improved in heat-conductivity of total materials and is reduced in vulcanizing time, and meanwhile is improved in durability when being used for long time under high load.

The invention relates to the technical field of high-molecular materials, and provides a mico-crosslinking thermoplastic elastomer and a preparation method thereof. The mico-crosslinking thermoplastic elastomer comprises the following components: a styrene type thermoplastic elastomer, synthetic rubber, white mineral oil, a foaming agent, a crosslinking agent, an antioxidant, a light stabilizer, zinc oxide, zinc stearate, abrasion-resistant agent and nano calcium carbonate. The preparation method comprises the following steps: placing the component materials into an internal mixer, and carrying out internal mixing for 10-15 minutes; controlling discharge temperature at 130-135 DEG C; then pressing into a uniform flaky shape by virtue of a double-roller open mill for discharge; finally cutting a material into a specified dimension, placing into a large-flake vulcanizing machine, carrying out vulcanizing forming, and controlling vulcanizing temperature at 170-175 DEG C and vulcanizing time at 180-350 seconds so as to obtain the mico-crosslinking thermoplastic elastomer. The mico-crosslinking thermoplastic elastomer disclosed by the invention has the characteristics of low density, high abrasion resistance, uniformity in froth, good low temperature flexibility, dimensional stability and the like.

The invention discloses a production method for a sealing gasket, which is characterized by comprising the following steps of: 1, according to a prescription, stirring graphite powder, rubber, reinforced fibres and an antiager in a stirrer, uniformly mixing, and then discharging; 2, adding an accelerant in the mixture after discharging, uniformly mixing, then placing the mixture in a mould, and tabletting at normal temperature; 3, adding a metal layer between two tablets to form a composite tablet, and performing rolling vulcanization on the composite tablet in a vulcanization machine having a vulcanization temperature which is controlled to be 165-200 DEG C, so as to obtain a semi-finished product; and 4, stamping the semi-finished product after vulcanization into the needed sealing gasket, namely, the finished product. Compared with the prior art, the production method disclosed by the invention has the advantages that the production process is simple, and the operation is safe and convenient; natural rubber is high in elasticity, so that the produced sealing gasket is good in elasticity and plasticity, and resistant to corrosion and wear; and the sealing gasket is not easy to age via the rolling vulcanization.

The present invention relates to the application of high energy radiation technology for vulcanizing rubber, and is especially rubber radiation vulcanizing process. Raw rubber material, compounding material, stuffing and vulcanizing agent are first mixed in a double roll blending mill or a Banbury mixer to un-vulcanized rubber shapes. The un-vulcanized rubber shapes are then radiation vulcanized to form radiation vulcanized rubber, or radiation vulcanized before or after being heated and vulcanized chemically to form mixed vulcanized rubber. The present invention can provide rubber product with excellent ozone tolerance, high chap tolerance, high heat resistance and good mechanical performance, and has the advantages of saving in energy, saving in material, short vulcanizing period and high vulcanizing quality.

The invention discloses porcelainized fireproof and heat insulation foamed silicone rubber and a preparation method thereof. The rubber comprises the following raw materials in parts by weight: 100 parts of base rubber, 10 to 60 parts of porcelain forming filler, 0.1 to 0.5 part of a platinum catalyst, 0.5 to 1.5 parts of silicone oil, 2 to 10 parts of a foaming agent, 0.1 to 0.5 part of a vulcanizing agent, and 0.1 to 0.4 part of a vulcanization accelerator. The foamed silicone rubber has good ceramic effect, does not have surface cracks, is hard in texture, keeps a complete foam structure, ensures that the volume retention rate is 85% or higher, and is excellent in fireproof performance.

The invention relates to a segmental pre-vulcanizing method of a sulfur tolerant shift catalyst in a multi-segment conversion process, particularly relates to a method for rapidly pre-vulcanizing cobalt-molybdenum-series sulfur tolerant shift catalysts and belongs to the technical field of pretreatment of the sulfur tolerant shift catalyst. According to the method, aiming at the situations of the temperature raising and the slow vulcanizing speed caused due to insufficient vulcanizing conditions, a segmental vulcanizing method is utilized, namely the rapid pre-vulcanizing of a first-segment furnace is reinforced to raise the temperature of a subsequent second-segment furnace; first-segment vulcanizing conditions are reinforced to guarantee the vulcanization of the catalyst so as to realize the rapid, efficient and complete vulcanization, meanwhile, the temperature of a subsequent second-segment bed is raised by high-temperature vulcanized gas in a rapid vulcanizing process, and the subsequent working segments are similarly processed, so that the vulcanizing and temperature raising time is greatly shortened, and the vulcanizing cost is lowered; by utilizing a circular vulcanizing manner, the emptying quantity is few, the overtemperature is avoided, the vulcanizing process is convenient and safe, the pollution is light, and the method has remarkable economic and social benefits.

The invention provides high-dispersity white carbon black and a preparation method thereof. The preparation method comprises the following steps: (1) heating water, adding water glass, then adding ethyl alcohol, and mixing the water, the water glass and the ethyl alcohol to obtain a reaction base solution, wherein the temperature in the whole process does not change, the concentration of the waterglass is 0.01 to 1.00 mol/L, and the mass percentage of the ethyl alcohol is 0.1 to 5 weight percent; (2) simultaneously adding acid and water glass into the reaction base solution for mixing for reaction, thereby obtaining white carbon black suspension, wherein the reaction temperature is kept constant and is equal to that of the reaction base solution, and the concentration of the water glass is kept constant and is equal to that of the reaction base solution; (3) stopping adding the water glass into the white carbon black suspension, and independently adding acid to adjust the pH of a reaction system to 3.0 to 5.0, thereby obtaining acidified white carbon black suspension; (4) carrying out solid-liquid separation on the acidified white carbon black suspension to obtain a filter cake, thereby obtaining the white carbon black. The white carbon black provided by the invention is extremely high in dispersivity, and shows a good rubber reinforcing effect.

The invention discloses a process for producing an ageing-resistant tire bladder sizing material. The process comprises the steps of (1) respectively weighing chlorinated butyl rubber and chloroprene rubber, adding the rubber into an internal mixer, mixing for 1-1.5 minutes, then adding butyl rubber, performing primary mixing, adding zinc oxide, microcrystalline wax and carbon black after 2-3 minutes, mixing for 3-5 minutes, adding castor oil, mixing, discharging the rubber after 3-4 minutes, and performing open mixing; (2) filtering the primary mixed rubber in a rubber filter; (3) adding the filtered mother rubber into the internal mixer, performing secondary mixing, adding a vulcanizing agent after mixing for 1-2 minutes, and discharging the rubber after 1-2 minutes; (4) extruding the secondary mixed rubber into a shape required by a die pressing vulcanizing machine or an injection vulcanizing machine by adopting a cold feed extruder. The process disclosed by the invention is improved from the formula and the production process, so that the production efficiency of bladders is greatly improved, the problems of surface cracking, seam allowance cracking and short service life of a finished product under severe use conditions are solved, the qualification rate of the bladder product is greatly improved, and the service life of the bladder product is greatly prolonged.

The invention discloses an antiskid wear-resistant sole material which comprises 15-20% of natural 3L rubber, 10-20% of butyl rubber, 10-15% of styrene butadiene rubber, 5-10% of short fiber, 10-15% of carbon black, 10-15% of white carbon black (SiO2), 1-2% of stearic acid (SA), 2-3% of paraffin oil, 2-3% of bis-silane tetrasulfide (Si-69), 3-6% of sulfur (S), 1-2% of an active agent, 0.5-0.7% of an antioxidant, 3-5% of zinc oxide (ZnO), 0.3-0.5% of magnesium oxide, 1-2% of an accelerant and 1-3% of a filler. According to the antiskid wear-resistant sole material disclosed by the invention, the antiskid coefficient of the sole is improved, the loss index of the obtained material is low, and the abrasion property and tear resistance are strong. The antiskid wear-resistant sole material has relatively good wear resistance and puncture resistance, improves the comfort and safety of the mountain climbing fitness exercise, prolongs the service life of shoes to a certain degree, and has a broad market application prospect.

The invention discloses rubber for sports shoe soles. The rubber for the sports shoe soles comprises the following components in parts by mass: 30-70 parts of butadiene rubber, 20-40 parts of naturalrubber, 15-30 parts of brominated butyl rubber, 10-20 parts of solution-polymerized styrene-butadiene rubber, 5-10 parts of glass fiber, 2-5 parts of polyethylene glycol, 0.5-2 parts of zinc stearate,2-5 parts of zinc oxide powder, 2.5-4 parts of a vulcanizing agent, 1.5-2.5 parts of an accelerator, 30-50 parts of white carbon black, 3-4.5 parts of a silane coupling agent, 4-7 parts of a homogenizing agent, 2-5 parts of softening oil, 1-3 parts of an anti-aging agent and 0.5-1 part of paraffin. The invention further provides a preparation method of the rubber for the sports shoe soles. Rubbershoe soles for sports shoes, prepared according to the technical scheme adopted by the invention, have many properties such as super wear resistance, good folding resistance and anti-slip performance; the preparation method is simple in production process and is suitable for wide application.

The invention relates to the machining method of a heat conduction tire bladder. The technical proposal of the invention includes the steps of mixing the materials, milling, extruding and forming, adhesive drying, vulcanization, edging and examination; wherein, the composition of the raw materials and the weight ratio are adjusted to: 50-67 portions of butyl rubber, 2-4 portions of chloroprene rubber, 2-4 portions of zinc dioxide, 1-2 portions of static agent, 8-15 portions of carbon black, 15-25 portions of acetylene carbon black, 1-3 portions of thermal conduction agent, 2-3 portions of castor oil and 4-5 portions of WS resin. The machining method of the heat conduction tire bladder has the advantages of (1) indicated in the thermal conduction experiment and compared with the common capsule, the thermal conduction speed is increased by 4 DEG C; (2) indicated in the client application experiment, the service life is increased by 15% generally due to the fast thermal conduction speed and the shortened vulcanization time; (3) the tire vulcanization time is shortened; the production efficiency of tires is improved; the cost is reduced by 5% for the tire manufacturer; (4) because the thermal conduction is fast, the preheating speed is increased when the new tire bladder is in use, the quality of the tire is ensured to be more stable.

The invention relates to a low hydroxyl content white carbon black and a preparation method of the low hydroxyl content white carbon black. The preparation method comprises the following steps: 1) preparing a reaction base solution with the pH of 7.0-10.5 at the temperature of 65-99 DEG C; 2) adding concentrated sulfuric acid and a sodium silicate solution to conduct a precipitation reaction, wherein the temperature of the precipitation reaction and the temperature of the reaction base solution are the same, keeping the pH of a system to 7.0-10.5 constant; 3) regulating the pH and post-processing to obtain the white carbon black. The white carbon black is low in hydroxyl content, the density of hydroxyl is less than 3/nm<2>, the white carbon black is excellent in dispersity, the white carbon black is taken as a reinforcing agent to prepare a rubber, the excellent reinforcing effect is shown, the vulcanizing rate is increased, the vulcanizing time of the rubber material is shortened, and the processing performances and the mechanical property of a rubber compound are improved.

The invention discloses a preparation method of a high-heat-conductivity type tire vulcanization capsule. The preparation method of the high-heat-conductivity type tire vulcanization capsule belongs to the technical field of tires, and comprises the following steps of (1) compounding the components according to the matching ratio: 95 parts of butyl rubber, 4 to 5 parts of chloroprene rubber, 15 to20 parts of N375 carbon black, 35 to 45 parts of acetylene black, 7 to 15 parts of graphene, 7 to 10 parts of alkane oil, 0.5 to 1.5 parts of stearic acid, 5 to 7 parts of zinc oxide, and 8 to 10 parts of resin; (2) primarily mixing; (3) filtering rubber; (4) secondarily mixing; (5) forming; (6) vulcanizing; (7) polishing; and (8) inspecting a finished product. According to the preparation methodof the high-heat-conductivity type tire vulcanization capsule provided by the invention, on the basis of ensuring the stability of various physical and mechanical properties, a heat conductivity coefficient is further improved, so that the aims of saving energy and reducing cost are achieved.

The invention relates to a novel high-pressure-resistant sealing system for an automobile engine and a manufacture method thereof. The manufacture method includes: step 1, improving definite elongation of rubber, adjusting proportion of raw materials of the rubber, adjusting a reinforcement system and improving definite elongation of the rubber so as to improve pressure resistance of the rubber by specifically increasing 3-4 parts by weight of white carbon black and reducing1-2 parts by weight of carbon black; and step 2, improving hardness of the rubber and increasing abrasion resistance of the rubber by increasing 30-40 parts by weight of wollastonite. The novel high-pressure-resistant sealing system has the advantages of being stable in size, oil resistant and anti-aging in engine oil, being low in friction factor, slow in temperature rise in unit time and abrasion resistant in valve guide rod reciprocating motion, enabling medium and high pressure resistance of a turbine to be increased, being capable of using environment-friendly adhesive for bonding, reducing pollution on environment, shortening vulcanizing time of an oil seal, saving energy, ensuring sealing reliability, prolonging service life of the oil seal and the like.