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

A rubber composition which is economical and has a strong anti-reversion performance includes 100 parts by weight of natural rubber, 40.0-60.0 parts by weight of carbon black, 1.0-6.0 the parts by weight of zinc oxide, 1.0-4.0 parts by weight of stearic acid, 1.5-5.0 parts by weight of an anti-aging agent, 1.0-5.0 parts by weight of an anti-reversion agent, 2.0-6.0 parts by weight of sulfur, and 0.5-2.0 parts by weight of an accelerant; the anti-reversion agent comprises the components of polyfunctional acrylate, white carbon black, and a fatty acid derivative. The rubber composition improves the anti-reversion performance of rubber, guarantees that a rubber material has stable mechanical performance under an over-cure condition, and besides, improves the dynamic performance of the rubber material.

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 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 relates to a preparation method of a novel carbon black dispersing agent for rubber. The novel carbon black dispersing agent comprises the following raw materials in parts by weight: 10-30 parts of polyethylene waxes or oxidized polyethlene waxes, 10-20 parts of zinc stearate, 10-30 parts of stearic acid, 10-30 parts of polyethylene glycol and 30-80 parts of pentaerythritol stearate. The novel carbon black dispersing agent disclosed by the invention can enhance the processing safety property, physical and mechanical property and vulcanizing rate of a rubber material, has multiple functions of dispersion, lubrication and physical plasticizing, is used for the mixing process of natural rubber and synthetic rubber, and can enhance the dispersibility of a filler and other powdery auxiliary agents in the rubber material, reduce the viscosity of the rubber material and enhance the flowability and extrusion rate of the rubber material, thereby reducing the energy consumption of tire or product processing, increasing the mixing efficiency, facilitating the demoulding of a vulcanized product and keeping the mould clean; and the novel carbon black dispersing agent disclosed by the invention can enhance the vulcanization reversion resistance and heat resistance of vulcanized rubber after being applied to the natural rubber.

The invention discloses a rubber material. The raw materials include: 70 parts by weight of natural rubber, 30 parts by weight of polyurethane rubber (E6008), 0.5 to 1.5 parts by weight of sulfur, 1 to 2.5 parts by weight of vulcanization aid, and 5 to 5 parts by weight of anti-aging agent. 10 parts by weight, 4 to 10 parts by weight of zinc oxide, 4 to 8 parts by weight of white carbon black, 10 to 30 parts by weight of carbon black, and 4 to 8 parts by weight of softener; Rubber (E6008) is used together, a rubber material in which polyester and polyether are mixed into the molecular chain of isoprene rubber as a flexible segment of rubber.

The invention relates to the technical field of rubber, particularly an anti-reversion shoulder pad rubber composition which is characterized by comprising the following components in parts by weight: 100 parts of natural rubber, 25-40 parts of carbon black, 5-10 parts of silica white, 3-5 parts of organosilicon mixture TESPT, 3-6 parts of zinc oxide, 1.5-2.5 parts of stearic acid, 1-2 parts of tackifying resin, 1-2.5 parts of anti-aging agent 4020, 0.5-1.5 parts of anti-aging agent RD, 1-2.5 parts of insoluble sulfur, 0.2-5-2 parts of accelerator NS, 0.2 part of vulcanization retardant CTP, 0.5-2.5 parts of hexamethylene-1,6-dithiosulfate disodium and 2 parts of crystal water. The invention enhances the anti-reversion capacity of the tire shoulder pad, ensures the stability of stress at definite elongation, hardness and other mechanical properties of rubber under the condition of overvulcanization, lowers the tire shoulder generated heat, and prolongs the service life of the tire.

The invention provides a polymer containing an ether polysulfide structure and a safe and efficient preparation method thereof. According to the preparation method of the polymer containing the ether polysulfide structure, organic thiosulfate and sodium sulfide serve as raw materials and carry out homogeneous reaction in an aqueous solution or a mixed solvent of a water-soluble organic solvent and water so as to obtain a polymer containing an ether polysulfide structure, wherein a molecular structure of the polymer comprises a plurality of alkyl sulfide chain segments. The polymer containing the ether polysulfide structure can be used as a sulfurizing reagent and added in a rubber material; the alkyl sulfide in the polymer participates in a sulfuration reaction process of the rubber and can effectively carry out cross-linking reaction with the rubber material to form stable monosulphur bonds or disulphur bonds; and meanwhile, flexible alkyl chains are insertd into macromolecules of the rubber, so that anti-reversion performance of the rubber material is improved.