11results about How to "Lower Mooney Viscosity" patented technology

The invention relates to the technical field of tire manufacturing, in particular to application of micro-nano reclaimed rubber in preparation of solid tire core rubber or solid tire crown rubber. Compared with solid tire crown rubber and solid tire core rubber prepared by using a traditional tire reclaimed rubber technology, the micro-nano reclaimed rubber is introduced into the solid tire crown rubber or solid tire core rubber formula, so that the Mooney viscosity of the solid tire crown rubber and the solid tire core rubber is remarkably reduced; meanwhile, the energy consumption caused by the use of TRR in the preparation process is also effectively reduced, the environmental pollution is greatly reduced, and particularly, the generation of wastewater is remarkably reduced.

This invention discloses an environmentally friendly plasticizer using modified lignin as a carrier, a rubber composition, and a method for preparing the same, relating to the field of rubber processing technology. The environmentally friendly plasticizer using modified lignin as a carrier, by weight, comprises the following components: 50 parts modified lignin, 25 parts plasticizing active ingredient, 8 parts dispersant, 5 parts anti-aging agent, and 3 parts stabilizer. The modified lignin is a lignin oligomer containing ester, acetyl, and ether cross-linked structures, with a weight-average molecular weight of 800-1200 Da, a dispersion coefficient ≤1.5, and a carboxyl content ≤0.2 mmol / g. This invention successfully overcomes the technical defects of existing plasticizer carriers, such as high toxicity, difficulty in degradation, and poor compatibility with polymer matrices, providing an environmentally friendly plasticizer using modified lignin as a carrier. This technical solution achieves the dual goals of high-value utilization of lignin and greening of the plasticizer product.

The invention belongs to the technical field of preparation of white carbon black, and discloses a preparation method of high-dispersion white carbon black and application of the high-dispersion white carbon black in reinforcing green tires. According to the method, SiO2 wet gel obtained by a precipitation method is taken as a raw material and is synergistically modified by phenyltrimethoxysilane (PTMS) and vinyltrimethoxysilane (A171) under certain conditions, the modification temperature is 70-90 DEG C, the modification time is 30-150 minutes, the modification pH is 2.5-4.5, the mass ratio of the PTMS to the A171 is 5: 2, the sum of modifiers is 3.5%-17.5% of the total mass of the SiO2 wet gel, and the SiO2 wet gel is prepared by the method. The high-dispersion and strong low-temperature flexibility white carbon black for reinforcing the green tire is prepared. According to the prepared product, the number of hydroxyl groups on the surface of the white carbon black is reduced, the processability and the mechanical property of rubber are improved, and the low-temperature flexibility and the wet skid resistance of tread rubber are enhanced. The method is simple in process and easy to realize industrialization, and has a good application prospect.

This invention discloses a precipitated silica dispersant for rubber, its preparation method, and its application, relating to the field of rubber additives. The precipitated silica dispersant for rubber is made from raw materials comprising the following proportions: modified vegetable oil and hydroxide, wherein the molar ratio of the modified vegetable oil to the hydroxide is 1:(0.3-0.6), and the modified vegetable oil is copolymerized from vegetable oil monomers, benzene ring unsaturated monomers, and cashew nut phenol. This application provides an environmentally friendly and safe precipitated silica dispersant that can significantly improve the dispersibility of precipitated silica in rubber compounds while simultaneously improving the mechanical properties of the rubber compounds.

The embodiment of the present application provides a hydroxymethylated alkylphenol formaldehyde resin addition asphalt and a preparation method thereof, and a rubber composition, which belongs to the technical field of rubber materials. The preparation method comprises: in the presence of an alkaline catalyst, a hydroxymethylation reaction is carried out on alkylphenol and formaldehyde to generate hydroxymethylated alkylphenol; a heating treatment is performed to dehydrate the hydroxymethylated alkylphenol and then react with asphalt to obtain alkylphenol addition asphalt; in the presence of an alkaline catalyst, a secondary hydroxymethylation reaction is carried out on the alkylphenol addition asphalt and formaldehyde to obtain hydroxymethylated alkylphenol formaldehyde resin addition asphalt. In the prepared hydroxymethylated alkylphenol formaldehyde resin addition asphalt, the hydroxymethylated alkylphenol formaldehyde resin matrix can play a role of cross-linking, and the asphalt end introduced by addition can improve the processing performance, mechanical properties and airtightness of the rubber compound.

The invention discloses a high and low temperature resistant softening agent and a preparation method and application thereof.The high and low temperature resistant softening agent comprises adipic acid, alcohol ether, butanediol and a catalyst, the molar ratio of the adipic acid to the alcohol ether to the butanediol is (0.5-3): (1-5): (0-3), the dosage of the catalyst is 1-4% of the total content of the components, and the content of the catalyst is 1-3% of the total content of the components. The alcohol ether comprises at least one of diethylene glycol monobutyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether and ethylene glycol monomethyl ether. The polyether ester softener simultaneously contains ester groups and ether bonds, is relatively high in molecular weight and good in molecular flexibility, and can be better combined with polar rubber and plastic materials; and the softening agent has the advantages of excellent cold resistance (low temperature resistance), heat resistance (high temperature resistance) and the like, can be used in products with high and low temperature resistance, and can easily widen the use temperature range of rubber products.

The invention discloses hydrogenated butadiene-acrylonitrile rubber and a preparation method thereof.The method comprises the steps that butadiene-acrylonitrile rubber liquid is subjected to a double-decomposition reaction to obtain a double-decomposition reaction mixture, in the presence of a hydrogenation catalyst system, the double-decomposition reaction mixture makes contact with hydrogen under the hydrogenation reaction condition to obtain a hydrogenation reaction mixture, and the hydrogenation reaction mixture is subjected to a hydrogenation reaction to obtain hydrogenated butadiene-acrylonitrile rubber. The hydrogenation catalyst system contains a hydrogenation catalyst, a ligand and an auxiliary agent, and the auxiliary agent is selected from one or more than two of compounds shown as a formula II. According to the preparation method of the hydrogenated butadiene-acrylonitrile rubber, the hydrogenation reaction activity can be obviously improved, the reaction speed can be increased, the reaction time can be shortened, and the Mooney viscosity of the product can be effectively reduced. (AoM) pYq (Formula II).

The present application relates to a kind of novel light color alkali-resistant and hydrogen peroxide immersion roller, including outer rubber layer and internal core, the outer rubber layer is wrapped in the outside of internal core;The outer rubber layer includes component by weight fraction: chlorosulfonated polyethylene rubber, 70~90 parts;Ethylene-propylene-diene rubber, 10~30 parts;Iron red, 5~8 parts;Red lead, 10~20 parts;Reinforcing agent, 50~80 parts;Vulcanizing agent, 3 parts;Accelerator, 2~3 parts;Plasticizer, 10 parts;Antioxidant, 1~1.5 parts;Extrusion dispersing agent, 3 parts, the advantage of the present application is that other auxiliary materials and extrusion dispersing agent are matched, the Mooney viscosity of compound is reduced, the process performance of compound in the process of forming extrusion is improved, the high temperature resistance, alkali resistance, hydrogen peroxide resistance, chemical medium resistance and other properties of immersion roller are improved, thereby prolonging the service life.

The utility model discloses a one-way valve with an injection-molded valve element. The one-way valve comprises an inlet shell, an outlet shell, a valve element assembly and an elastic piece. The inlet shell and the outlet shell are detachably assembled together in a communicating mode, and the valve element assembly is adjustably assembled in a cavity between the inlet shell and the outlet shell through an elastic piece. The valve element assembly comprises a valve element base and a fluorinated silicone rubber sealing ring. The valve element base can be arranged in the first assembling groove of the inlet shell in a sliding mode in the direction of the central axis of the one-way valve, a fluorinated silicone rubber sealing ring is arranged at the end, facing the inlet channel, of the valve element base, and the other opposite end of the valve element base abuts against the interior of the second assembling groove of the outlet shell through an elastic piece. When the one-way valve is used, the problems that fatigue damage of a valve element rubber ring of a one-way valve in the prior art cannot be effectively improved, and meanwhile the requirement for low flow resistance in a hydraulic system cannot be guaranteed are solved.

The invention provides a method for preparing low-protein natural rubber through enzyme compounding, and belongs to the technical field of preparation of low-protein natural rubber products. When the low-protein natural rubber is prepared, pancreatin and trypsin are matched according to the mass ratio of 1: 1, and when the dosage is 0.2 wt%, the protein content of a sample is the lowest. The low-protein natural rubber prepared by the process is superior to acid-coagulated natural rubber in tensile strength, aging property, Mooney viscosity and the like. Compared with the use of the traditional single protease, the use of the compound protease is obviously better than the use of the single protease, and the nitrogen content in the natural rubber can be reduced to about 0.086%; compared with a centrifugal method for preparing the low-protein natural rubber, the technology provided by the invention is simple in process, convenient to operate and more suitable for large-scale production while achieving an ideal effect.

The invention relates to the technical field of tire rubber mixing, and discloses a mixing method of a high-wear-resistance and low-heat-generation rubber composition, which comprises the following steps of: separately mixing high-molecular-weight natural rubber or butadiene styrene rubber / carbon black mixed high-temperature field and butadiene rubber / white carbon black / silane coupling agent mixed low-temperature field; the technical difficulty of blending rubber compositions with different temperature field requirements is effectively solved; meanwhile, the Mooney viscosity of the rubber composition can be greatly reduced by utilizing the high shearing capacity of the screw, and the segregation problem of the filler in different rubbers is improved; for the rubber composition without the addition of filling oil, the mixing method can further improve the abrasion performance of the rubber composition; in addition, VOC emission in the rubber composition processing process is effectively reduced through collection and treatment of VOC in the mixing process.