1260results about How to "Reduce rolling resistance" patented technology

The invention relates to a preparation method of a wet process mixed natural rubber material. The method comprises the following steps of: preparing slurry and soaking 15-40 percent of dry white carbon black in 60-85 percent of deionized water; adding a coupling agent and a surfactant, uniformly mixing, grinding, preparing latex mixed liquor, extracting natural latex and adding white carbon black water dispersoid into the latex; stirring and mixing to obtain a latex mixed liquor, flocculating and adding acetic acid into the mixed liquor; performing rubber washing and dehydration by using a rubber washing machine and feeding to a rubber pelletizer for pelletizing; and feeding rubber particles into a box drying cabinet for drying. The preparation method has the advantages of simple machining process, small equipment investment, realization of various ideal performances with the most ordinary white carbon black, low dust pollution in the entire production process and energy saving. A tire manufactured with the method has small rolling resistance, low heat generation, high tensile strength, high tearing strength and high rubber material ageing resistance. Mixing of the white carbon black is performed in a liquid phase, so that the dispersivity and uniformity are enhanced.

Diene rubber compositions are described containing a diene elastomer, a reinforcing inorganic filler, and a coupling agent wherein the inorganic filler includes a silica having the following characteristics:(a) a BET specific surface area between 45 and 400 m2 / g;(b) a CTAB specific surface area between 40 and 380 m2 / g;(c) an average particle size (by mass), dw, of 20 to 300 nm;and at least one of the following characteristics, preferably two and more preferably all three:(d) a particle size distribution such that dw≧ / CTAB)−30;(e) a porosity which meets the criterion L / FI≧−0.0025 CTAB+0.85;(f) an amount of silanols per unit of surface area, NSiOH / nm2; NSiOH / nm2≦−0.027 CTAB+10.5.These diene rubber compositions can be used for the manufacture of tires or of semi-finished products intended for tires.

There is provided a pneumatic tire capable of achieving both reduced rolling resistance and enhanced durability and a method of producing the same. The pneumatic tire includes a reinforcement layer, formed of a steel cord coated with coating rubber, including at least one of a carcass, a bead reinforcement layer, a side reinforcement layer and a belt, with said coating rubber formed of a rubber compound containing 100 parts by mass of diene rubber, 30 to 80 parts by mass of silica having a nitrogen surface area of at least 70 m2 / g and at most 150 m2 / g, 1 to 15 parts by mass of a silane coupling agent, and organic acid cobalt salt. Preferably the steel cord has a cut edge of a breaker coated with an edge strip of rubber.

A camber angle applying device is controlled to adjust the camber angle of wheels to a predetermined value. Therefore, the characteristics (or a high gripping property) of a high gripping force and the characteristic (or a low rolling resistance) of a small rolling resistance can be separately used as the performance of the wheels. By utilizing the high gripping property of the wheels, therefore, a vehicle is enabled to reduce its energy consumption, while retaining its running characteristics (such as a turning performance, an accelerating performance or a braking performance), by utilizing the rolling resistance of the wheels. Moreover, the camber angle applying device is controlled to reduce the rolling resistance of the wheels, so that the energy loss to occur in the wheels during running can be reduced to further reduce the energy consumption of the vehicle.

This invention discloses a method for preparing rubber compositions that exhibit unique combinations of properties that are desirable for tire tread applications for enhanced snow / ice and wet traction, low rolling resistance and increased treadwear performance in comparison with conventional silica compounds. Specifically, a high reactively silane coupling agent, such as a mercaptosilane, is used in combination with a silane coupling typically used for silica tread compounds such as bis(triethoxylsilylpropyl)disulfide to treat silica pellets in a hydrocarbon solvent at elevated temperatures. The treated silica is then blended with solution elastomer cement in a hydrocarbon solvent. The deposited reactive silanes partially react with the elastomer molecules forming a layer of polymer grafted on the silica surfaced. This structure significantly improves the silica retention during the steam stripping operation. Almost 100% (99+%) silica retention has been achieved by this invention. After solvent removal from steam stripping, the treated silica / elastomer mixer is dewatered and dried using conventional equipment such as shaker screens, expellers and expanders to form a well-dispersed silica masterbatch. This technique results in silica compounds with excellent silica dispersion and increased filler-polymer interaction, hence enhanced compound performance such as better physical properties, more desirable dynamic properties (low hysteresis at high temperatures and high hysteresis at low temperatures) and increased abrasion resistance.

The present invention is directed to a rubber composition that is useful for the manufacture of tires, where the composition is based on a diene elastomer, a reinforcing inorganic filler, and a coupling system. The coupling system comprises a polysulfurized alkoxysilane (“PSAS”) coupling agent (inorganic filler / diene elastomer) associated with a 1,2-dihydropyridine and a guanidine derivative. The present invention is further directed to tires and semi-finished products for tires comprising a rubber composition according to the invention. The invention is also directed to a coupling system (inorganic filler / diene elastomer) for a rubber composition based on a diene elastomer reinforced by an inorganic filler, where the coupling system comprises a polysulfurized alkoxysilane (PSAS) coupling agent in association with a 1,2-dihydropyridine and a guanidine derivative.

A rubber composition for a tire, in which a specific tackifier is compounded, and tackiness and various physical properties are improved, compared with compounding a petroleum resin or a terpene resin, is provided. The rubber composition for a tire comprising an alkyd resin and a pneumatic tire using the same. It is preferable that a material derived from a resource other than petroleum, particularly, a material derived from animal and / or vegetable, and more particularly, a material derived from an animal oil and / or a vegetable oil is contained in the alkyd resin, and it is preferable that unsaturated polybasic acid is contained in the alkyd resin.

The present invention relates to a sulfur-cross-linkable elastomeric composition that is useful for the manufacture of tires. This elastomeric composition is based on at least one isoprene elastomer (in particular natural rubber), a reinforcing inorganic filler (in particular, silica), and an (inorganic filler / isoprene elastomer) coupling agent. The coupling agent is a multifunctional polyorganosiloxane (POS), which comprises functions denoted as “Y” and “X”, wherein the Y function is at least one hydroxyl or hydrolyzable function grafted to the silicon atoms of the coupling agent and the X function is a group bearing at least one activated ethylene double bond and is grafted to the silicon atoms of the coupling agent. This POS is, in particular, a POS having an imide, acid or ester function, the ethylene double bond of which is activated by at least one adjacent carbonyl group (—C═O). The present invention further relates to a tire comprising the composition described above as well as semi-finished products for tires, in particular, treads, where the tires comprise a rubber composition according to the present invention.

An omnidirectional exercise platform is disclosed which includes a base member, a pad member and a plurality of ball transfer units. The pad member is coupled to a top surface of the base member. The plurality of ball transfer units is coupled to a bottom surface of the base member. An angular offset is provided between the plurality of ball transfer units to stabilize the omnidirectional exercise platform during use. The ball transfer units each comprise a hemispherical housing, a primary ball member and a plurality of secondary ball members disposed between an inner surface of the hemispherical housing and the primary ball member. The housing further includes an aperture located and sized to facilitate cleaning and maintenance procedures of the ball transfer unit. A handle is releasably coupled to the top surface of the base member to thereby provide a user with a variety of hand placement positions.

A windmill 10 includes a frame 11 and a rotor 12 provided rotatively around the vertical shaft center. The rotor includes bosses 23, 24 located above and below, plural transversal blades 25 extending radially from the bosses, longitudinal blades 26 held by the front edges of the transversal blades 25 of both above and below bosses. The frame includes bearing 19, 20 supporting the bosses 23, 24 of the rotor rotatively around the vertical shaft center, spokes 17 provided radially supporting the bearing, and legs 15 holding the spoke 17 away from the ground. In the lower bearing 20, a generator connected to the boss 24 of the rotor 12 is accommodated.

Alkoxy-modified silsesquioxane compounds are described. The alkoxy-modified silsesquioxane compounds contain an alkoxysilane group that participates in an alkoxysilane-silica reaction as a silica dispersing agent in rubber, with the release of zero to about 0.1% by weight of the rubber of volatile organic compounds (VOC), especially alcohol, during compounding and further processing. Further described are methods for making alkoxy-modified silsesquioxanes, methods for making vulcanizable rubber compounds containing alkoxy-modified silsesquioxanes, vulcanizable rubber compounds containing alkoxy-modified silsesquioxanes, and pneumatic tires comprising a component that contains alkoxy-modified silsesquioxanes.

An omnidirectional exercise platform is disclosed which includes a base member, a pad member and a plurality of ball transfer units. The pad member is coupled to a top surface of the base member. The plurality of ball transfer units is coupled to a bottom surface of the base member. An angular offset is provided between the plurality of ball transfer units to stabilize the omnidirectional exercise platform during use. The ball transfer units each comprise a hemispherical housing, a primary ball member and a plurality of secondary ball members disposed between an inner surface of the hemispherical housing and the primary ball member. The housing further includes an aperture located and sized to facilitate cleaning and maintenance procedures of the ball transfer unit. A handle is releasably coupled to the top surface of the base member to thereby provide a user with a variety of hand placement positions.

The present invention relates to a natural rubber that contains 200 ppm or less of phosphorus.