38results about How to "Improve anti-reversion performance" patented technology

The invention discloses a method for preparing a multifunctional rubber assistant by recycling alkali-weight-reduction processing discharged liquor. The method comprises the following steps: sequentially passing alkali-weight-reduction wastewater through a laminar-flow precipitation tank and an activated carbon filter to enter an acid precipitation tank, adding sulfuric acid or hydrochloric acid while stirring, and precipitating terephthalic acid when the wastewater becomes acidic; and adding the terephthalic acid and stearic acid into a reaction kettle, adding water and sodium hydroxide to dissolve the terephthalic acid and stearic acid into a sodium solution, adding a zinc chloride solution to crystallize and precipitate a zinc terephthalate-zinc stearate crystal mixture, centrifuging, filtering, washing and drying to obtain the multifunctional rubber assistant finished product. By using the alkali-weight-reduction processing wastewater as the raw material, the method reduces the wastewater discharge and implements resource reutilization on the premise of preparing the novel rubber assistant, and thus, has obvious economic benefit and social benefit.

The invention discloses an all-steel radial tire combined rubber compound for improving shoulder separation and tread separation. The all-steel radial tire combined rubber compound is respectively used for preparing shoulder pad rubber and base part rubber. The all-steel radial tire combined rubber compound comprises, by weight, 80.0-100.0 parts of natural rubber, 0-20.0 parts of cis-polybutadienerubber, 15.0-45.0 parts of carbon black, 8.0-15.0 parts of white carbon black, 3.0-6.0 parts of zinc oxide, 1.0-3.5 parts of an activator stearic acid, 1.0-2.0 parts of a carbon black dispersant, 0.5-2.0 parts of an antioxidant RD, 1.0-2.5 parts of an antioxidant 4020, 1.3-3.8 parts of a silane coupling agent, 1.5-3.0 parts of insoluble sulfur IS7020, 0.8-1.8 parts of an accelerator NS, 0.1-0.3 part of a scorch retarder and 0.5-2.0 parts of alkyl phenol disulfide. The above formula rubber compound has a high modulus at a given elongation, so the deformation of a tire under the same load is reduced, thereby heat generated by compression deformation and curling is reduced; and the rubber compound has the advantages of low dynamic heat, good aging resistance, improvement of the long-time high load driving resistance of the tire, and effective reduction of the shoulder separation, tread separation and other symptoms.

The invention relates to the technical field of rubber, and in particular relates to a rubber material for supporting rubber of a run-flat tire, a preparation method of the rubber material, and the run-flat tire. The rubber material for the supporting rubber of the run-flat tire disclosed by the invention includes the following components: base rubber, a filler, an active agent, an anti-aging agent, resin, a vulcanizing agent, an accelerator and a multifunctional crosslinking auxiliary agent, wherein the base rubber comprises natural rubber and cis-polybutadiene. According to the rubber material, the resin and the multifunctional crosslinking auxiliary agent are added, so that the use amount of the vulcanizing agent and the accelerator is reduced, and the rubber material for the supportingrubber of the run-flat tire provided by the invention has excellent processability and reversion resistance while having high stretching strength, high modulus and high-temperature resistance.

The invention belongs to the technical field of rubber, and particularly relates to piercing-resistant and tear-resistant tread base rubber and a preparing method thereof. The piercing-resistant and tear-resistant tread base rubber is prepared by conducting primary mixing, secondary mixing and third mixing on natural rubber, carbon black, white carbon black, a silane coupling agent, an anti-ageingagent, graphene oxide, modified DCPD resin, zinc oxide, stearic acid, an accelerant, sulfur, an anti-reversion agent and a scorch retarder through an internal mixer. By applying the modified DCPD resin, the graphene oxide and the anti-reversion agent to the all-steel tire tread base rubber in proper proportion, the respective characteristics are complementary, the tear resistance, piercing resistance, ageing resistance and reversion resistance of the tread trench bottom base rubber in the use process of an all-steel tire can be improved, and therefore the service life of the all-steel tire isprolonged.

The invention discloses a carcass layer tread rubber of an aviation radial tire. A crude rubber system of the carcass layer tread rubber jointly adopts natural rubber and butadiene rubber; a reinforcement system adopts STERLIN V (SV) carbon black and adopts parts of white carbon black; accessory ingredients, including silane coupling agent KH-560, binding agent SL-3090, adhesion promoter AIR-201, adhesion promoter AIR-1 and the like, are added into a formula. The carcass layer tread rubber disclosed by the invention has the advantages of low hardness and stress at definite elongation, soft rubber material and small possibility of generating gaps during repeated deformation; the carcass layer tread rubber can be suitable for the performance requirements of high speed, high load and high refurbishment frequency of a novel tire in the future; before and after ageing, the carcass layer tread rubber has the advantages of high bonding strength of the rubber material and a nylon cord, good fatigue durability, low heat generation, high rebound value and small hysteresis loss; a carcass layer of the tire can be protected from delamination, swelling and tire side puncturing, and the service life and the safe performance of the aviation radial tire are improved.

The invention relates to a bifunctional organic thiosulfate of an anti-reversion agent for rubber industry and a preparation method thereof. The bifunctional organic thiosulfate provided by the invention has two active groups, a sulfur-containing active group generates a cross-linking reaction with rubber macromolecules in a rubber vulcanization process to insert a thermostable alkyl into a sulfur crosslinking bond; in addition, when reversion occurs in an over-vulcanization or application process of vulcanized rubber, the unsaturated double bond groups of the bifunctional organic thiosulfate would generate a Diels-Adel reaction with the C=C bond in the rubber so as to generate a thermostable C-C crosslinking bond to maintain the crosslinking density of the vulcanized rubber, improve the vulcanized reversion of the vulcanized rubber and enhance the service performance and service life of the products.

The invention discloses a modified carbon black and a preparation method thereof. Gutter oil and waste engine oil are refined to be made into standard raw oil, and the standard raw oil is fully mixed with terephthalic acid metal salt and carbon black according to a certain proportion. The method adopts the gutter oil and the waste engine oil as raw materials, not only realizes the comprehensive utilization of wastes, but also solves the utilization problem of the gutter oil and the waste engine oil, turns waste into wealth, and brings good social benefits. As the standard raw oil, which is low in cost, is used, the production cost of an enterprise can be reduced, and the modified carbon black has a considerable economic value. The prepared carbon black is convenient to use, and tests prove that the mechanical property of a product can be improved after the carbon black is added into the product. The carbon black is applied to natural rubber, and can improve the vulcanization reversion resistance and heat resistance of rubber materials.

The invention discloses a rubber anti-reversion agent composition. The composition is prepared by using the following raw materials, by weight, 50-100 parts of natural rubber, 20-50 parts of carbon black, 15-45 parts of white carbon black, 3-7 parts of zinc fatty acid, 5-8 parts of disodium dithiosulfate, 8-12 parts of zinc aromatic acid, 7-15 parts of citraconyl imine, 2-5 parts of an accelerant NS, and 4-8 parts of propanethiol. The rubber anti-reversion agent composition has the advantages of stable performances, good quality, improvement of the anti-reversion capability of rubber, and guarantee of the stress at definite elongation of the rubber compound under over vulcanization conditions.

The invention discloses an insulating-layer semiconductive shielding material for an ethylene propylene rubber cable. The material is characterized by being prepared from, by weight, 60-70 parts of nitrile butadiene rubber, 30-40 parts of chlorinated polyethylene, 30-50 parts of cable powder, 50-70 parts of conductive carbon black A, 10-30 parts of conductive carbon black B, 5-10 parts of magnesium oxide, 2-4 parts of paraffin, 2-8 parts of anti-aging agents, 20-30 parts of dioctyl phthalate, 0.5-1 part of dispersants, 2-5 parts of stearic acid and 1-8 parts of vulcanizing agents. The insulating-layer semiconductive shielding material for the ethylene propylene rubber cable has the advantages of good heat oxygen aging resistance, ozone aging resistance, acid-base resistance and chemical resistance performance, excellent oil resistance performance, good removability and glue liquidity, low cost and the like.

The invention relates to the technical field of rubber products, and particularly discloses a rubber composition, a preparation method thereof and a rubber product. The rubber composition comprises the following components in parts by weight: 100 parts of rubber, 20-80 parts of carbon black, 0.5-5 part of vulcanizing agent and 1-10 parts of mixed alkyl resorcinol modified cardanol formaldehyde bonding resin, and the mixed alkyl resorcinol modified cardanol formaldehyde bonding resin comprises a formula (1) and a formula (2), the mixed alkyl resorcinol modified cardanol formaldehyde adhesive resin is terminated by alkyl resorcinol; the preparation method of the rubber composition comprises the following steps: mixing rubber and carbon black, heating to 140-160 DEG C, cooling to 80-95 DEG C,adding the vulcanizing agent and the mixed alkyl resorcinol modified cardanol formaldehyde adhesive resin, and mixing at 40-50 DEG C for 4-10 minutes to obtain the rubber composition. The rubber composition of the present application has excellent adhesion properties.

The invention relates to a manufacturing process of a high-elastic coupler, in particular to marine mechanical high-elastic coupler rubber and a vulcanization preparation method thereof, and mainly solves the technical problems that the vulcanization process method existing in the prior art has low vulcanization degree, low comprehensive vibration damping performance, poor high temperature resistance, poor fatigue resistance, poor weather resistance, poor rubber mechanical properties, incapability of mass production and processing, and the like. The marine mechanical high-elastic coupler rubber comprises 90-110 parts by weight of natural rubber, 4-6 parts by weight of zinc oxide, 0.5-2 parts by weight of stearic acid, 10-35 parts by weight of high wear-resistant carbon black, 20-45 parts by weight of universal carbon black, 0-6 parts by weight of white carbon black, 1-2 parts by weight of sulfur, 1-2 parts by weight of an accelerator, 2-4 parts by weight of an anti-aging agent, 0.1-1 part by weight of a a scorch retarder, 0.5-2 parts by weight of a dispersing agent and 0-10 parts by weight of a softener, and can be obtained by first vulcanization by hot air, second vulcanization bypressurization, and third vulcanization at room temperature.

The invention discloses a high-aging-resistance rubber material and a preparation method thereof. The rubber material is characterized by mainly comprising natural rubber and modified chlorosulfonated polyethylene rubber, wherein the modified chlorosulfonated polyethylene rubber accounts for 0.1-5 wt% of the total amount of the natural rubber and modified chlorosulfonated polyethylene rubber. By fully utilizing the characteristic of heat oxidation aging resistance of the chlorosulfonated polyethylene rubber and the characteristic that sulfur can be adopted for vulcanization after modification, after the MCSM-120 is doped into the natural rubber, a vulcanization crosslinked network structure can be generated between the two rubber molecules, and the chlorosulfonated polyethylene rubber molecular chain is connected into the natural rubber molecular chain, thereby improving the stability of the natural rubber vulcanization crosslinked bond structure under high-temperature conditions, and enhancing the high temperature resistance, heat oxidation aging resistance, ozone resistance and weather resistance of the rubber shock absorber and nti-reversion property of the natural rubber.

The invention discloses an anti-reversion rubber composition. The rubber composition employs 100 parts of natural rubber as a reference substance, and also comprises 30-35 parts of carbon black, 6-9 parts of white carbon black, 4 parts of organosilicon mixture TESPT, 5 parts of zinc oxide, 2 parts of stearic acid and 1-2 parts of a fire retardant. The anti-reversion capability of a tyre shoulder wedge is improved, and the stability of mechanical properties such as tensile stress, hardness and the like of the rubber composition under the over-cure condition are guaranteed.

The invention discloses a rubber material. The rubber material comprises 70 parts by weight of natural rubber, 30 parts by weight of polyurethane rubber (E6008), 0.5-1.5 parts by weight of sulfur, 1-2.5 parts by weight of a vulcanizing agent, 5-10 parts by weight of an anti-aging agent, 4-10 parts by weight of zinc oxide, 4-8 parts by weight of white carbon black, 10-30 parts by weight of carbon black and 4-8 parts by weight of a softening agent. According to the rubber material, the natural rubber and the polyurethane rubber (E6008) are used together, and polyester and polyether are blended in an isoprene rubber molecular chain and serve as a flexible chain section of the rubber.