43results about How to "Improve vulcanization activity" patented technology

The invention discloses an operating method for a vulcanized hydrogenation catalyst. The method comprises the following steps: impregnating the vulcanized hydrogenation catalyst with an organic complex solution of a group-VIII metal; carrying out heat treatment so as to allow a layer of a protective film to form on the surface of the vulcanized hydrogenation catalyst; carrying out treatment in the presence of inert gas so as to allow the group-VIII metal to be inlaid in the defect of molybdenum disulfide or tungsten disulfide, thereby forming a high-activity hydrogenation active phase; and then carrying out switching into hydrogen, adjusting pressure and temperature to reaction pressure and reaction temperature after air current is steady, feeding raw oil and beginning a hydrogenation reaction. The method provided by the invention can passivate the vulcanized catalyst, facilitates transportation, storage and filling of the catalyst and can improve hydrogenation performance of the catalyst.

The invention discloses a rubber composition for an upper support of an automobile shock absorber. The rubber composition is prepared from the following components: 70 to 85 parts of natural rubber, 15 to 30 parts of butadiene rubber, 2 to 3.5 parts of amine antiagers, 1 to 2 parts of quinoline dihydride antiagers, 2.5 to 3.5 parts of physical antiager, 11 to 15 parts of activating agent, 3 to 5 parts of coupling agent, 40 to 65 parts of reinforcing agent, 4 to 8 parts of plasticizer, 1.5 to 2.5 parts of vulcanizing agent and 1.8 to 3 parts of accelerant. The rubber composition for the upper support of the automobile shock absorber, provided by the invention, has the advantages of excellent properties of high temperature resistance and heat resistance, as well as small physical property change, high strength retaining rate and good high-temperature compression permanent deformation of aged rubber. The produced upper support of the automobile shock absorber has excellent high-temperature creepage and dynamic fatigue property, is in a leading level of the industry, and obtains the approval of domestic and foreign customers.

The invention provides a high-temperature-resistant and wear-resistant fluororubber sealing element and a preparation method thereof. The high-temperature-resistant and wear-resistant fluororubber seal element is prepared from the following raw materials in parts by weight: 50-70 parts of 26 type fluororubber, 20-45 parts of 23 type fluororubber, 12-20 parts of medium-particle pyrolysis carbon black, 5-8.5 parts of organic modified attapulgite, 1-1.8 parts of calcium silicate, 0.5-1 part of a talc powder, 1.5-2.5 parts of hydroxyl fluorosilicone oil, 1.5-2.5 parts of magnesium oxide, 0.3-0.5 part of a silane coupling agent, 2-3 parts of perfluoromethyl phenyl hydroxyl peroxide, 0.4-0.7 part of triallyl isocyanurate, and 0.5-1 part of a processing aid. The prepared sealing element has excellent high-temperature resistance and wear resistance and high strength, and the service life of the sealing element can be effectively prolonged.

The invention provides a novel fluorinated silicone rubber additive as well as a preparation method and application thereof, and the preparation method comprises the following steps: in the presence of a solvent, reacting trifluoropropyl methyl dichlorosilane, magnesium chips and halopropene, adding a complex breaker after the reaction is finished, filtering, and rectifying to obtain trifluoropropyl allyl methyl chlorosilane; mixing trifluoropropyl allyl methyl chlorosilane with a non-polar solvent, introducing ammonia gas to react, and finally filtering and carrying out reduced pressure distillation to obtain di (trifluoropropyl) di (allyl) dimethyl disilazane. The novel fluorinated silicone rubber additive disclosed by the invention has the advantages that the effect of a structured control agent can be achieved; meanwhile, the compatibility of the white carbon black and the fluorosilicone raw rubber can be improved, a cross-linking reaction with a cross-linking point on the fluorosilicone raw rubber is easier to occur, chemical bond connection is formed between the white carbon black and the fluorosilicone raw rubber, and the elasticity and oil resistance of the fluorosilicone rubber are improved under the condition that the use amount is very small.

The invention belongs to the field of oil field oil sludge resourceful treatment, especially discloses reclaimed rubber prepared from oil field oil sludge as a main raw material, and also discloses a production method. The reclaimed rubber prepared from the oil field oil sludge is composed of the raw materials by the mass percentage: 50%-65% of oily sludge, 5%-20% of a waste tire rubber powder, 20%-40% of clay, 0.1%-0.4% of an activator 420, 0.1%-0.3% of ethylene tar, and 0.1%-0.3% of alkyl phenol disulfide. According to the reclaimed rubber prepared with oil field oil sludge, through formula optimization design, the content of the oily sludge is increased significantly, the consumption of the oil field sludge is increased, and the oil field oil sludge resourceful treatment effect is increased by 20% or more; with use of the waste tire rubber powder, the use amount is only 5%-20% and is significantly reduced, and the production cost is saved; the reclaimed rubber has relatively short reclaiming reaction time and has high degree of desulfurization, and the reclaimed rubber properties all reach national corresponding reclaimed rubber standards.

The invention relates to the technical field of silicone rubber, particularly to high-hardness air-pressure-resistant silicone rubber, a preparation method and a use method thereof. The high-hardnessair-pressure-resistant silicone rubber is prepared from the following raw materials in parts by weight: 4-8 parts of hydroxyl-terminated polydimethylsiloxane, 100-115 parts of methyl vinyl silicone rubber, 60-70 parts of modified fumed silica, 1-3 parts of vinyl hydroxyl silicone oil, 0.4-0.8 part of a silane coupling agent, 0.06-0.18 part of a release agent and 0-1.5 parts of a hardening agent. According to the invention, the high-hardness air-pressure-resistant silicone rubber disclosed by the invention has very good hardness and air pressure resistance, has relatively good comprehensive properties such as viscosity, tensile strength and shrinkage rate, and can well meet the requirements of special industrial production on hardness; and the preparation method is simple, convenient to operate and control and high in production efficiency, large-scale industrial production can be achieved, the using method of the high-hardness air-pressure-resistant silicone rubber is convenient to operate and control and stable in quality, and the prepared silicone rubber product is stable in performance.

The invention discloses an all-steel radial giant engineering tire sidewall filling rubber which is composed of the following components in parts by weight: 100 parts of natural rubber, 10-25 parts of white carbon black, 20-50 parts of hard carbon black, 6-15 parts of softening agent, 2-4 parts of resorcinol, 6-15 parts of zinc oxide, 1-3 parts of stearic acid, 2-7 parts of anti-aging system, 1.3-3.5 parts of vulcanization system, 0.8-1.5 parts of accelerator and 0.1-0.5 part of anti-scorching agent. The sidewall filling rubber prepared according to the formula has the advantages of low heat generation, excellent bending resistance, moderate hardness and moderate stress at definite elongation, and can obtain favorable balance between Mooney viscosity and tire adhesiveness.

The invention discloses a rubber material for wear-resistant and antistatic rubber rollers. The raw materials include, by weight, 50-70 parts of carboxylated nitrile rubber, 30-50 parts of EPDM rubber, and 5-25 parts of naphthenic oil , 15-30 parts of reinforcing agent, 3-6 parts of modified nano-zinc oxide, 6-10 parts of plasticizer, 2-3 parts of vulcanizing agent, 1-3 parts of accelerator, 1-5 parts of auxiliary agent; wherein, The weight percent content of propylene units in the EPDM rubber is 40-50%, the weight percentage content of ethylene units is 45-55%, and the weight percentage content of ethylidene norbornene units is 4-6%. The invention adopts the blending of EPDM rubber obtained by polymerization of ethylene, propylene and ethylidene norbornene with a specific ratio and carboxylated nitrile rubber, which reduces the hardness of EPDM rubber and improves the tensile strength and wear resistance Performance, adding modified nano zinc oxide, improves the wear resistance and antistatic performance of the rubber roller, and at the same time improves the rubber vulcanization activity, shortens the vulcanization time and reduces the production cost.

The invention provides a rubber vulcanization activator, and a preparation method and application thereof, and relates to the technical field of rubber vulcanization. The rubber vulcanization activator provided by the invention comprises calcium terephthalate and zinc oxide loaded on the surface of the calcium terephthalate; the mass ratio of the zinc oxide to the calcium terephthalate is (1-6): (9-4). According to the rubber vulcanization activator of the invention, the calcium terephthalate can be used as a matrix for loading the zinc oxide, so that the dispersibility of the zinc oxide can be improved; the zinc oxide can be uniformly dispersed in a rubber matrix, and therefore, on the basis of ensuring the vulcanization activity of the zinc oxide, the dosage of the zinc oxide is effectively reduced, production cost is reduced, and meanwhile, the pollution of the zinc oxide to the environment is reduced. The calcium terephthalate is a non-polar material and is used as the matrix for loading the zinc oxide, so that the contact area of the zinc oxide and rubber molecules is increased, and therefore, the compatibility of the zinc oxide and a rubber molecular chain is enhanced, and the tensile strength of vulcanized rubber is improved.

The invention discloses a method for preparing zinc oxide for a sealing ring. The method comprises the following steps: weighing the following components in parts by weight: mixing polyethylene and aplasticizer and performing plasticizing treatment for 10 to 15 minutes to obtain a mixture A; mixing the common zinc oxide, chitosan, nanometer titanium dioxide and nanometer white carbon black, throwing the mixture into a muffle furnace, sintering for 1 to 2 hours, transferring into a ball mill and grinding a mixture B; mixing the mixture B, the mixture A and a phthalic ester coupling agent, throwing the mixture into a ball mill,and stirring at the speed of 120 to 180 rpm to obtain a material A; and transferring the material A into a calcining furnace and calcining to obtain the needed zinc oxide. The method capable of improving the vulcanization activity of the common zinc oxide is simple to operate, the effect is obvious, and the vulcanization speed of natural rubber can be obviously improved and the use amount of the zinc oxide in a formula can be reduced under the condition of guaranteeing the crosslinking density of vulcanized rubber; in addition, the nanometer white carbon blackis added in the formula, and the obtained zinc oxide has high lubricating property and high wear resistance.

The invention provides a sizing material for a spiral spring supporting seat, a preparation method of the sizing material and an automobile spiral spring supporting seat, and the sizing material for the spiral spring supporting seat is prepared from the following components in parts by weight: 60-80 parts of star branched butyl rubber, 20-40 parts of cis-1, 4-polybutadiene rubber, 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 3-6 parts of Sumilink100 and 5-15 parts of thermal isoprene rubber. The composition is prepared from the following components in parts by weight: 20 to 30 parts of carbon black N330, 10 to 15 parts of white carbon black 7000 GR, 1 to 1.5 parts of POLYVEST, 10 to 20 parts of paraffin oil, 5 to 8 parts of an anti-aging agent, 0.75 to 0.85 part of sulfur and 3.70 to 4.35 parts of an accelerant. The rubber material for the spiral spring supporting seat has the characteristics of high damping, high durability, high wear resistance, weather resistance, low temperature resistance and the like, so that the comprehensive performance of the spiral spring supporting seat can be improved.