252results about How to "Improve rolling resistance" patented technology

Free-flowing filler compositions containing sulfur-containing silane coupling agents, and a tire composition containing the filler composition, for use in the manufacture of tires.

Free-flowing filler compositions containing silated cyclic core polysulfide coupling agents, and rubber and tire compositions containing the filler compositions.

The invention provides a method for producing a modified conjugated diene (co)polymer, the method including comprising: a modification reaction step including causing an organic silane compound to react with a conjugated diene (co)polymer having an active site at the active site, the organic silane compound having a characteristic group for forming a silanol group through hydrolysis and, in the vicinity of the characteristic group, (i) a functional group which binds the organic silane compound to the conjugated diene (co)polymer via addition to or substitution at the active site and which promotes reaction between the silanol group and a reinforcing filler after the addition or substitution reaction, or (ii) a functional group which promotes reaction between the silanol group and a reinforcing filler, and a hydrolyzation step performed after the modification reaction step; a modified conjugated diene (co)polymer having, at a molecular end of the conjugated diene (co)polymer, a silanol group, and a functional group in the vicinity of the silanol group, the functional group accelerating reaction between the silanol group and the reinforcing filler; a rubber composition containing the (co)polymer and carbon black having specific characteristics; and a tire formed from the rubber composition.

The present invention reveals a tire having a tread that is comprised of (1) 30 phr to 80 phr of a non-random styrene-butadiene rubber comprised of polymer chains that are derived from styrene and 1,3-butadiene, wherein from about 10 weight percent to about 50 weight percent of the repeat units in the styrene-butadiene rubber are derived from styrene, wherein from about 60 weight percent to about 90 weight percent of the repeat units in the styrene-butadiene rubber are derived from 1,3-butadiene, wherein from about 30 weight percent to about 50 weight percent of the styrene repeat units are in sequences containing 5 to 20 styrene repeat units, wherein the bound styrene content found in the first half of the polymer chains differs from the bound styrene content found in the second half of the polymer chains by at least 5 weight percent, wherein the styrene-butadiene rubber has a 1,2-vinyl content which is within the range of about 8 percent to about 20 percent, wherein the styrene-butadiene rubber has a number average molecular weight which is within the range of 200,000 to 475,000, and wherein the styrene-butadiene rubber has a glass transition temperature which is within the range of −82° C. to −50° C. and (2) 20 phr to 70 phr of polybutadiene. The tire tread formulation can optionally contain silica and lignin.

A rubber mixture, in particular for vehicle pneumatic tires, straps, belts and hoses. The rubber mixture includes the following constituents: at least one synthetic diene rubber; at least one carbon black; at least one silane; and, at least one amphophilic compound. The rubber mixture ameliorates the target conflict between rolling resistance and wet grip.

The invention relates to a method for preparing silica modified by a silane coupling agent. The method comprises the following steps: preparing a kind of coupling agent sol solution by mixing the solvent, water, catalyst and coupling agent; uniformly dispersing silica into the sol solution by means of ultrasonic dispersion or shear dispersion to achieve a turbid solution with uniform dispersion and ideal particle size; and then stirring the turbid solution at a constant speed to make the coupling agent sol reacting with silica to prepare highly hydrophobic silica modified by the coupling agent through controlling the temperature and reaction time. The coupling agent sol solution is obtained by a sol-gel process and silica is uniformly dispersed in the coupling agent sol solution through combined action of various dynamic means to ensure the sufficient reaction between silica and coupling agent, thus to obtain silica modified by the coupling agent.

A tread of a total thickness E for tires, comprising, when new: a running surface intended to be in contact with the roadway during travel; a plurality of first cutouts of a depth of less than the thickness of the tread and defining tread pattern elements of a height less than the total thickness of the tread; a plurality of cavities subjacent the running surface when new and extending over an average length L, each of these cavities being intended to form at least one new groove or incision after partial wear of the tread; each cavity delimited by the rubber of the tread having an upper generatrix beneath the running surface when new; this tread being characterized in that, for each cavity, the upper generatrix follows an undulating profile having a series of recesses and elevations, the amplitude of these recesses and elevations being at least 10% of the depth of the new grooves or incisions created.

The invention discloses a low-volatility benzothiazolyl mercaptosilane and a preparation method thereof. A molecular structural formula of the low-volatility benzothiazolyl mercaptosilane is shown in the patent specification. The preparation method of the low-volatility benzothiazolyl mercaptosilane comprises the following steps that 1, a polyether and a chloroalkyl silane undergo a reaction at a temperature of 30 to 180 DEG C in the presence of one or more catalysts; and R3-H is separated from the reaction products so that a silane semi-finished product is obtained; and 2, 2-mercaptobenzothiazole is added into an organic solvent; and one or more alkalis and semi-finished silane are added into the 2-mercaptobenzothiazole solution to undergo a reaction with stirring at a temperature of 20 to 120 DEG C in a nitrogen atmosphere for 0.5 to 24 hours; the reaction products are subjected to filtration, washing and reduced pressure distillation to produce a brown-red liquid desired product. The low-volatility benzothiazolyl mercaptosilane can release a small quantity of alcohols, can improve reinforcing effects, mechanical properties and dynamic mechanical properties of vulcanized rubbers, and rolling resistance and wet skid resistance of tread rubber, has long scorch time and fast sulfuration speed, and can improve greatly sulfuration performances of rubber materials.

It is an object of the present invention to provide a tire rubber composition excellent in performances such as silica dispersibility and processability. The present invention relates to a tire rubber composition, comprising: a rubber component that contains an epoxidized natural rubber; silica; and a silane coupling agent, wherein the amount of the epoxidized natural rubber in 100% by mass of the rubber component is 15% by mass or more, the silica has a CTAB specific surface area of 180 m2 / g or more and a BET specific surface area of 185 m2 / g or more, and the silane coupling agent contains a mercapto group.

The invention relates to a tire with a tread which is reinforced with a quantitative amount of silica, including a silica coupler, where the tread rubbers are of a blend comprised of styrene / isoprene / butadiene terpolymer rubber and cis 1,4-polybutadiene rubber or styrene / isoprene / butadiene terpolymer rubber, cis 1,4-polybutadiene rubber and isoprene / butadiene copolymer rubber. Optionally, the rubber blend can contain a minor amount of cis 1,4-polyisoprene natural rubber.

A rubber composition for a tire comprising a rubber component containing at least one of a natural rubber and an epoxidized natural rubber, not less than 15 parts by mass of silica based on 100 parts by mass of the rubber component, and not less than 0.5 part by mass of calcium stearate based on 100 parts by mass of the rubber component, a tire member made using the rubber composition for a tire, and a tire made using the tire member.

A carriage for a conveyor comprising a carriage body which is configured for embracing a running rail and which comprises a first and a second leg which are connected by a connection portion, wherein the first leg has first rollers which are attached to the internal side of the first leg, and the second leg has second rollers which are attached to the internal side of the second leg, and the connection portion has third rollers which are attached to the internal side of the connection portion, it is provided according to the invention that the first and the second rollers are vertically disposed, and the third rollers are horizontally disposed.

The present invention has its object to provide a rubber composition for a tread which can prevent reversion and can also achieve environmental performance (excellent rolling resistance, response to depletion of oil resources, attention to CO2 emission), wet grip performance, dry grip performance, handling stability, and durability (abrasion resistance, crack resistance) in a well-balanced manner. The present invention also aims to provide a pneumatic tire using the rubber composition for the tread thereof. The rubber composition for a tread includes a rubber component containing 35% by mass or more of an epoxidized natural rubber; and a white filler, wherein a total sulfur content is less than 1.75% by mass, and a crosslink density is 7.0×10−5 mol / cm3 or more.

The invention relates to tire tread mix with low rolling resistance. The tire tread mix with low rolling resistance has the advantages that carbon black serving as a tread filler of a conventional tire is partially substituted by white carbon black, meanwhile, a right amount of silane coupling agent is added for chemically modifying the white carbon black, so that the Payne effect and loss angle tangent tan delta at a high temperature of the mix can be effectively reduced, further the rolling resistance of a tire is improved, the effects of reduction of oil consumption and exhaust emission and environmental friendliness are achieved, and therefore, by adopting the tire tread mix with low rolling resistance, about 50% of tread lag performance and about 20% of rolling resistance of the tire can be reduced, thus more than 30% of fuel is saved. The tire tread mix with low rolling resistance comprises the following comments in parts by weight according to a formula: 70-90 parts of natural rubber, 10-30 parts of cis-butadiene rubber, 5-30 parts of carbon black, 30-50 parts of white carbon black, 5-10 parts of coupling agent, 3-5 parts of zinc oxide, 1-3 parts of stearic acid, 3-6 parts of antiager, 1-2 parts of sulfur, 1.0-2.0 parts of promoter and 0.1-0.3 part of scortch retarder CTP.

The invention discloses a rubber composite applied to car radial tire treads. The rubber composite comprises the following substances of (i) dialkene elastomer; (ii) more than 30 phr of inorganic reinforcing filler; (iii) 2-15 phr of a coupling agent; (iv) 0-20phr of a plasticizer; and (v) 2-20 phr of resin, wherein phr represents the weight parts of all materials accounting for 100 parts by weight of dialkene elastomer. When the tire tread comprising the rubber composite is in use, the tire tread has excellent slip resistance and rolling resistance, and the tires are endowed with the balance of wetland grip, rolling resistance and wear resistance.

This invention relates to a tire having at least one component of a silica reinforced rubber composition comprised of an emulsion polymerization derived terpolymer rubber which contain pendant hydroxyl groups, particularly derived from diene hydrocarbon and vinyl aromatic compound monomers, particularly a hydroxyalkyl methacrylate. Preferably the hydroxyalkyl methacrylate is a hydroxypropyl methacrylate (HPMA). Preferably at least one additional elastomer is blended with the terpolymer rubber. The rubber composition is prepared by blending a coupling agent therewith subsequent to the addition said silica reinforcement. Said tire component may be, for example, a tire tread.

A roll for use in a papermaking machine has a circumferential surface formed of a polymeric material including a plurality of chemically reactive elastomer nano-particles and a resin. The polymeric material has a glassy transition temperature that is substantially the same as a glassy transition temperature of the resin alone.