3340results about "Special tyres" patented technology

The present invention addresses the problem of providing a pneumatic tire in which a reduction in tire performance is mitigated despite using polyamide fibers with low amide density. The solution is a pneumatic tire characterized by comprising a carcass layer (50), belt layers (60A, 60B), and a belt reinforcement layer (70A), wherein reinforcing cords (50-1, 70A-1) in the carcass layer (50) and / or the belt reinforcement layer (70A) contains polyamide fibers having an amide density of 14.0 or less, and (i) when a gauge thickness A from the outer circumferential surface on the tire inner-surface side of the reinforcing cords (50-1) of the carcass layer (50) to the tire inner surface is measured at 100 equally spaced points, the average of the gauge thickness A is 1.5 mm or less, or (ii) when a gauge thickness D from the outer circumferential surface on the tire outer-surface side of the reinforcing cords (70A-1) of the belt reinforcement layer (70A) to the tire outer surface is measured at 100 equally spaced points, the gauge thickness D is 6.0 mm or less at 80% of the measurement points or more.

The application provides a masterbatch type vulcanization aid and a preparation method thereof, a rubber composition, a rubber product and a tire. The preparation method comprises the following steps: S1, pre-reaction of stearic acid, an antioxidant and a vulcanization system to obtain a pre-reaction mixture; and S2, mixing of the pre-reaction mixture with rubber to obtain the masterbatch type vulcanization aid. Under the catalysis of stearic acid, the reagents in the antioxidant and the vulcanization system react to generate active intermediates. The active intermediates have the effect of promoting vulcanization and play the role of activating accelerators in advance, so that the active intermediates can replace the role of zinc oxide. The product after reaction is mixed with rubber, and the masterbatch formed can be used to prepare rubber products such as tires without containing zinc elements, so that zinc emission can be realized, and the environment is friendly.

The rubber composition for a tire tread according to the embodiment contains a rubber component containing a diene rubber and vegetable granules having a surface treated with a sulfonic acid-type surfactant. The rubber composition for a tire tread has excellent on-ice performance, excellent wet performance, and excellent low heat generation property.

The present invention relates to an elastomeric laminate comprising at least two adjacent layers, wherein: the rubber composition constituting the first layer is based on 20 phr to 100 phr of at least one copolymer comprising ethylene units and 1,3-diene units of formula CH2=CR-CH=CH2, the ethylene units in the copolymer representing more than 50 mol% of the copolymer monomer units, and the symbol R represents a hydrocarbon chain having 3 to 20 carbon atoms, 0 phr to 80 phr of at least one diene elastomer having a diene unit weight concentration greater than 50%, 10 phr to 100 phr of a plasticizing system comprising at least one plasticizing resin having a glass transition temperature higher than 20°C and / or at least one plasticizer which is liquid at 23°C, and a reinforcing filler, and a crosslinking system; the rubber composition constituting the second layer is based on a diene elastomer having a diene unit weight concentration greater than 50% and a crosslinking system. The present invention also relates to a rubber article, in particular a pneumatic or non-pneumatic tire, comprising such a laminate.

The invention discloses a preparation method of tread rubber, and belongs to the field of rubber processing. The preparation method comprises the following steps: pretreating aramid pulp, a coupling agent and a lubricant, and then adding the pretreated aramid pulp, the coupling agent and the lubricant into natural rubber to prepare aramid pulp master batch particles; the obtained aramid pulp master batch particles are added into raw materials for preparing tread rubber, and the prepared rubber material has excellent mechanical properties, wear resistance and low rolling resistance. According to the method, the dispersity and interface combination of the aramid pulp in the rubber are remarkably optimized, the comprehensive improvement of the mechanical property, the wear resistance and the rolling resistance of the tread rubber is realized, and the tread rubber has outstanding industrial application value.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastics via the polymerization of dienes prior to further treatments.

The present application relates to the technical field of colored tire rubber, and specifically discloses an anti-discoloration rubber composition for colored tires and its preparation method. An anti-discoloration rubber composition for colored tires is prepared by first preparing modified colored silica, then using solution-polymerized styrene-butadiene rubber, natural rubber, and EPDM as the rubber matrix, adding modified colored silica for coloring and reinforcement, and then adding polydicyclopentadiene resin, titanium dioxide, YDH-151 silane coupling agent, zinc oxide, stearic acid, sulfur and TBBS accelerator, protective wax, AFS / LG antioxidant, antistatic agent and other auxiliary agents to prepare the anti-discoloration rubber composition for colored tires. The anti-discoloration rubber composition for colored tires prepared in this application has the advantages of stable color, aging resistance, good tensile strength, strong wear resistance, and strong weather resistance.

The application provides a zinc-free vulcanization aid, a rubber composition, a rubber product and a tire. The zinc-free vulcanization aid is prepared by the following method: zinc oxide, stearic acid, an antioxidant, a vulcanization system medicine are pre-reacted in a solvent, and after pre-reaction, filtration for removing zinc and solvent removal are sequentially performed to obtain the zinc-free vulcanization aid. The zinc-free vulcanization aid contains an active intermediate generated by pre-reaction, the intermediate has the effect of promoting vulcanization, and plays the role of activating the accelerator in advance, so that it can partially or completely replace the role of zinc oxide in the ordinary formula. The zinc-free rubber product can be prepared by using the zinc-free vulcanization aid, zinc emission is realized, the environment is friendly, and through the action of the zinc-free vulcanization aid, the rubber composition can obtain the rubber properties such as crosslinking density, hardness, modulus, hysteresis and the like close to those of the zinc-containing rubber without containing zinc.

The invention discloses a preparation method of bio-based material modified coumarone resin, an obtained product and application. The preparation method comprises the following steps: mixing a mixture containing polymerizable components indene and coumarone, styrene or a derivative thereof and a catalyst; then dropwise adding a mixture containing polymerizable components indene and coumarone and an organic solvent solution of a bio-based material to carry out polymerization reaction; and adding a quenching agent after the reaction, and performing post-treatment to obtain a final product. According to the invention, a bio-based material is adopted as a raw material, and the raw material is derived from natural plants and has the characteristics of environmental friendliness, degradability and the like, so that the cyclic utilization of resources is realized, and the generation of wastes is reduced. The bio-based modified coumarone resin is high in hydroxyl content and narrow in molecular weight distribution, the compatibility of the coumarone resin and polar resin is improved, the use performance and the application range of the coumarone resin are improved, and the bio-based modified coumarone resin has good application prospects in the fields of adhesives, rubber, coatings, ink and the like, and is particularly suitable for tire tread rubber.

A green and sustainable tire base rubber composition and a preparation method, relating to the technical field of tire production. The composition comprises a tire base. The tire base comprises 100 parts by weight of cis-1,4-polyisoprene, 20-40 parts by weight of bio-based carbon black, 0-20 parts by weight of bio-based silicon, 0-20 parts by weight of a silane coupling agent, 1-3 parts by weight of stearic acid, 2-7 parts by weight of zinc oxide, 0.5-2 parts by weight of a carbon black coupling agent, 1.5-3.5 parts by weight of the antioxidant 6PPD, 0.5-2 parts by weight of the antioxidant TMQ, 1.5-2 parts by weight of oil-extended sulfur powder, and 1.5-3.0 parts by weight of the accelerator CZ. The use of the carbon black coupling agent reduces the heat build-up of a rubber material, however, the Mooney viscosity of the rubber is significantly increased. Once a dedicated process has been used, the viscosity of the rubber material is controlled, and the tanδ value of the heat build-up of the rubber material at 60°C is significantly reduced, so that the rolling resistance of a tire is reduced, and the tire maintains good physical and mechanical properties.

The present invention belongs to the fields of pyrolyzed carbon black reinforcement, and the manufacturing of tires and non-tire rubber products. Provided are an interfacial reinforcing agent for pyrolyzed carbon black, and reinforced pyrolyzed carbon black and the use thereof. The interfacial reinforcing agent for pyrolyzed carbon black comprises the following components in parts by mass: 0.1-10 parts of a main interfacial reinforcing agent and 0.1-3 parts of an auxiliary interfacial reinforcing agent, wherein the main interfacial reinforcing agent comprises one or more of a nitrogen-containing compound, an active-double-bond-containing compound and a sulfur-containing compound; and the auxiliary interfacial reinforcing agent comprises one or more of a coupling agent compound, an organic acid compound and an amide compound. With regard to different functional groups (including double bonds, oxygen-containing functional groups, etc.) contained in the surface of the pyrolyzed carbon black, a suitable interfacial reinforcing agent is selected for modification to make the interfacial reinforcing agent react with the surface of pyrolyzed carbon black, thereby improving the tensile strength of the modified pyrolyzed carbon black in a rubber system.

The invention discloses a migration-resistant macromolecular anti-aging agent as well as a preparation method and application thereof, and belongs to the technical field of anti-aging agents. The preparation method comprises the following steps: putting p-aminodiphenylamine into a reaction container; heating the reaction container, and stirring the interior of the reaction container by using a stirrer; dropwise adding glycidyl methacrylate into the reaction container; performing constant-temperature reaction for a period of time to obtain a reaction material; adding white carbon black, pouring reaction materials into a barrel of a high-speed stirring dispersion machine, and stirring and mixing; and taking out the powdery product to obtain the migration-resistant macromolecular anti-aging agent. According to the migration-resistant macromolecular anti-aging agent, p-aminodiphenylamine and glycidyl methacrylate serve as raw materials, the macromolecular anti-aging agent containing double bonds and hydroxyl is prepared through amino ring-opening epoxy reaction, the migration resistance of the anti-aging agent can be greatly improved through combination of the carbon-carbon double bonds and the structure on the surface of rubber, meanwhile, the hydroxyl can capture free radicals, and the migration resistance of the anti-aging agent is improved. The aging process of the rubber is delayed and the service life is prolonged.

The invention relates to the technical field of tire rubber manufacturing, and discloses an EV tire tread rubber composition adapting to low temperature and a mixing method thereof. According to the invention, the high-vinyl solution polymerized styrene-butadiene rubber A, the low-glass transition temperature solution polymerized styrene-butadiene rubber B and the lithium-series cis-butadiene are matched to form a rubber substrate, and the high-dispersion white carbon black, the bio-based filling oil and the high-proportion wet-skid-resistant resin are matched, so that the matching amount of various raw materials is strictly controlled; and the rolling resistance of the tire at low temperature is effectively reduced while the gripping performance of the tire is ensured.

A cross-linked product obtained through crosslinking a polymer composition that contains a rubber component, an inorganic filler and a cross-linking agent and that satisfies conditions (a) to (c): (a) the rubber component contains a conjugated diene-based polymer (A) having, when composition ratios (molar ratios) in the conjugated diene-based polymer (A) of structural units represented by formulae (1) to (4) are p, q, r, and s, respectively, a value α represented by formula (i) of 0.80 or more and 0.97 or less;(b) a blending ratio of the conjugated diene-based polymer (A) is 10% by mass or more relative to a total amount of the rubber component; and (c) a blending ratio of the inorganic filler is 40 to 150 parts by mass relative to 100 parts by mass of the rubber component, wherein the Tg of the cross-linked product is −25° C. or lower.

The application provides a rubber composition for tires and a preparation method and application thereof. The rubber composition for tires of the application applies high-molecular-weight smoked sheet rubber, greatly improves mechanical and dynamic properties of vulcanized rubber, adopts neodymium-based butadiene rubber with wear resistance, fatigue aging resistance and lower heat generation, and applies solution styrene-butadiene rubber with higher thermal stability and good flex resistance at high temperatures, and improves comprehensive performance of the formula in multiple aspects. The application adopts super wear-resistant N134 and uses bio-based white carbon black and conductive carbon black, provides super high wear resistance of the formula, reduces heat generation, and makes the tire not fail due to a large amount of heat accumulation in a continuous operation process. The application adopts a high inorganic metal oxide filling amount method, greatly improves a thermal conductivity coefficient of the formula, further improves heat accumulation resistance of the formula, timely discharges heat generated in an extreme condition, and ensures safety of tire operation.

The present invention provides a vulcanization aid and a preparation method therefor, a rubber composition, a rubber product, and a tire. The preparation method comprises: pre-reacting an anti-aging agent with a vulcanization system agent under the action of a catalyst, wherein the catalyst includes stearic acid. Under the catalytic action of stearic acid, the anti-aging agent reacts with a reagent in a vulcanization system to generate an active intermediate. The active intermediate has the function of promoting vulcanization and plays a role of activating an accelerator in advance, so that the active intermediate can functionally replace zinc oxide, can be used for preparing a rubber product completely free of the element zinc, e.g., a tire, can achieve zinc-free emission, and is environmentally friendly.

The invention discloses a rubber composition with low silane coupling agent content as well as a preparation method and application thereof. The rubber composition comprises rubber, white carbon black, a silane coupling agent and a modified catalyst. The modified catalyst is a composition of zinc dialkyl dithiophosphate and organic phosphine salt, the dosage of the silane coupling agent accounts for 0.5-15 wt% of the white carbon black, and the dosage of the modified catalyst accounts for 1-60 wt% of the silane coupling agent. The silane coupling agent and the modified catalyst are added into the rubber composition at the same time, and through combination of the silane coupling agent and the modified catalyst, the purpose of reducing the dosage of the silane coupling agent is achieved on the premise that excellent dispersity of the white carbon black and good aging resistance and physical and mechanical properties of the rubber composition are guaranteed; therefore, the purpose of reducing the comprehensive manufacturing cost of the rubber composition and even the whole tire is achieved, low-cost application of the functional silane coupling agent in the rubber composition is achieved, and the problems existing in the prior art are fundamentally solved.

The invention provides a reaction type anti-aging agent composition and a preparation method thereof, and particularly, the anti-aging agent composition comprises a compound as shown in a formula I-1, a compound as shown in a formula I-2 and a compound as shown in a formula II, in the anti-aging agent composition, the total content of a compound as shown in a formula I-1 and a compound as shown in a formula I-2 is greater than 0 wt% and less than or equal to 99.8 wt%, and the content of a compound as shown in a formula II is greater than 0 wt% and less than or equal to 99.8 wt%; the structures of the compound in the formula I-1, the compound in the formula I-2 and the compound in the formula II are described in the specification. The anti-aging agent composition disclosed by the invention is simple in preparation process and almost free of three wastes. The anti-aging agent composition provided by the invention can endow the rubber composition with good thermo-oxidative aging resistance and excellent weather aging discoloration resistance.

The application relates to a deformable wheel with non-pneumatic load bearing intended to equip a vehicle for rolling under extreme conditions such as those encountered on the Moon and on Mars, comprising a hub, an annular tread intended to be in contact with the soil, positioned around the hub which is concentric therewith and comprising a layer of composite material coated with at least one protective layer, and a plurality of metal cables whose outer diameter is comprised between 0.2 mm and 5 mm, each cable connecting the hub to the tread while being fixed, on the one hand by an external end to the tread, and on the other hand by an internal end to the hub by an elastic member making it possible to modulate the radial stiffness of the cables, each elastic member being associated with an abutment able to limit its deformation.

The present invention relates to a modified precipitated silica (MPS) comprising precipitated silica particles, polyethylene glycol and an antioxidant selected from certain hydroxyfuranones or phenolic derivatives. The invention also relates to a process for the manufacture of the MPS, to elastomer compositions comprising the MPS and to their use for the manufacture of semi-finished or finished articles, such as tire parts.

To provide a hydrogenated copolymer capable of achieving superior processability and fuel-saving performance when formulated into a resin composition, while exhibiting excellent handling properties when used alone.SOLUTION: A hydrogenated copolymer comprises: a hydrogenated block copolymer (X) having at least one polybutadiene block (A) with a vinyl group content of 20 mass% or less; and a polymer (Y) including structural units derived from an aromatic vinyl compound and / or structural units derived from a conjugated diene compound, wherein the ratio of the number average molecular weight of the hydrogenated block copolymer (X) to the number average molecular weight of the polymer (Y) is 2.5 or more and 30 or less.SELECTED DRAWING: None

The problem to be solved by the present disclosure is to provide recovered carbon black that enables the production of a tire excellent in breaking resistance and excellent in reinforcing characteristic, a rubber composition containing the recovered carbon black, and a tire produced from the rubber composition. The solution is recovered carbon black having a carbon content of 85 mass% or more and 97 mass% or less, an ash content of 0.5 mass% or more and 10 mass% or less, and a statistical thickness specific surface area of 50 m2 / g or more.

Provided are a tire excellent in the balance between on-ice performance and wear resistance, and a vulcanized rubber and a rubber composition from which the tire is obtained. The rubber composition contains: a rubber component containing natural rubber, polybutadiene rubber, and styrene-butadiene copolymer rubber; a silica-containing filler; and an unmodified conjugated diene-based polymer in which a weight average molecular weight in terms of polystyrene is 5,000 or more and less than 40,000, a styrene bond content of a conjugated diene compound portion is less than 10% by mass, and a vinyl bond content of the conjugated diene compound portion is 40% to 65% by mass. A mass n of the natural rubber in the rubber component is 35 to 44% by mass, and a mass b of the polybutadiene rubber, and a mass s of the styrene-butadiene copolymer rubber satisfy a relationship of s≤b, and a content of the conjugated diene-based polymer is 1 to 40 parts by mass per 100 parts by mass of the rubber component.

To provide a rubber composition based on a filler comprising at least one diene elastomer, at least carbon black and an inorganic filler, particularly silica, in which the filler is very well dispersed in the elastomer matrix.SOLUTION: The invention relates to a rubber composition based on: at least one diene elastomer; a filler comprising at least carbon black and an inorganic filler with an inorganic filler content less than or equal to 50 pts.wt. per hundred parts of elastomer (phr); and a crosslinking system.SELECTED DRAWING: None

The invention comprises a composition. The composition comprises an uncured rubber material blended with hyaloclastite having a volume-based mean particle size of less than or equal to 160 μm. A process for making the composition is also disclosed.

The invention discloses liquid natural rubber, an ultrahigh-hardness easily-processed apex rubber composition as well as a preparation method and application of the liquid natural rubber and the ultrahigh-hardness easily-processed apex rubber composition. The liquid natural rubber is prepared by carrying out aerobic cracking on plasticated natural rubber in a screw shearing manner. The liquid natural rubber which can be cross-linked and has plasticizing capacity is developed, the molecular weight range of the liquid natural rubber is controlled, it is guaranteed that the liquid natural rubber can easily form a cross-linked network through sulfur and an accelerant, and the liquid natural rubber has an excellent plasticizing effect when not cross-linked. The liquid natural rubber is introduced into the apex rubber composition for plasticizing, so that the processability is improved, meanwhile, the influence on the hardness and modulus of vulcanized rubber can be reduced by virtue of the crosslinkable property of the liquid natural rubber, and meanwhile, the modulus and hardness are further optimized by virtue of phenolic resin, so that the composition has the characteristics of easiness in processing and ultrahigh hardness.

The invention provides a tire tread rubber composition with high bio-based content. The composition is prepared from the following raw materials in parts by weight: 10-40 parts of natural rubber; 0 to 30 parts of modified polystyrene-butadiene rubber; 50 to 80 parts of bio-based itaconate rubber; 5 to 20 parts of bio-based carbon black; 50-90 parts of rice hull ash white carbon black; 0-20 parts of biological base oil; 4-8 parts of a bio-based silane coupling agent; 5-30 parts of bio-based wet skid resistant resin; according to the composition, bio-based resources are used as main raw materials, dependence on petroleum resources is reduced, and carbon emission in the production process is reduced; the rubber composition basically does not contain harmful chemical substances, and is safer and more reliable to use.

The invention relates to the technical field of aerial work equipment, in particular to an aerial work platform and a traction walking control method thereof. The power unit is fixedly arranged in the middle of the chassis; the auxiliary walking mechanism is connected with the chassis through a bolt, a first connecting piece and a self-lubricating shaft sleeve; the control oil cylinder acts to realize the angle swing of the coupling auxiliary wheel; the supporting legs are arranged on the periphery of the chassis, and supporting leg oil cylinders and supporting leg control valves are arranged on the supporting legs. The problem that a dragging type aerial work platform is difficult to move in a working place is solved, so that the labor intensity of an operator is relieved, and the purpose of walking freely is achieved.

The invention discloses a stab-resistant rubber, a preparation method of the stab-resistant rubber and a stab-resistant tire, the stab-resistant rubber comprises the following components in percentage by weight: 40-60% of butyl rubber, 5-15% of aramid fiber, 10-15% of nano silicon dioxide, 10-20% of plasticizer, 1-3% of vulcanizing agent and 5-10% of additive, and the additive comprises an anti-aging agent, an accelerant and a filler which are mixed. The puncture resistance of the puncture-proof rubber is remarkably improved, puncture of a tire by a sharp object can be effectively prevented, and the risks of tire air leakage and tire burst are greatly reduced.

The invention discloses a silicone rubber composite material for enhancing the wear resistance of a tire and a preparation method of the silicone rubber composite material, and belongs to the technical field of silicone rubber materials for tires. The silicon carbide nanofibers directionally bear stress through a one-dimensional structure, the surface friction coefficient is reduced through the layered lubricating characteristic of fluorinated graphene, and crack propagation is inhibited on the micro-level through the synergistic effect of the silicon carbide nanofibers and the fluorinated graphene. The tribological performance is further optimized through compound addition of the polyimide microspheres and the nano-diamond powder, dynamic friction loss is reduced through the ball effect, and the surface scratch resistance is improved through the ultra-high hardness of the nano-diamond powder. Meanwhile, the filler-matrix binding force is enhanced through interface bonding of the sulfydryl modified titanium dioxide quantum dots and the zinc borate nanosheets, abrasive particle falling caused by interface stripping is effectively avoided, and the structural integrity of the material is kept under the long-term dynamic load.