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3992results about "Rolling resistance optimization" patented technology

Preparation method of wet process mixed natural rubber material

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.
Owner:ZHUZHOU ANBAOLINFENG NEW MATERIALS

Preparation method of white carbon black modified styrene-butadiene rubber facing green tires and product thereof

The invention provides a preparation method of white carbon black modified styrene-butadiene rubber facing green tires and a product thereof. White carbon black is used in the technical field of styrene-butadiene rubber modification, so as to provide guidance to the application of the white carbon black modified styrene-butadiene rubber in the tire industry. The styrene-butadiene rubber is characterized in that the styrene-butadiene rubber contains white carbon black of which the weight percentage to dry styrene-butadiene rubber latex is 30 percent to 100 percent. The preparation method comprises the steps that firstly, the white carbon black is mixed with water to obtain a white carbon black-water suspension; afterwards, the white carbon black-water suspension is subject to surface treatment, so as to enable the surface of the white carbon black to be organized; the pH (potential of hydrogen) value of the suspension is adjusted to be 9 to 12; and finally, the suspension is evenly mixed with the styrene-butadiene rubber latex to obtain liquid styrene-butadiene rubber sizing to which the white carbon black is added, and then the modified styrene-butadiene rubber containing the white carbon black is prepared by adopting an emulsion blending and flocculation process. The white carbon black modified styrene-butadiene rubber prepared by adopting the preparation method has the advantages that the white carbon black is evenly distributed in the styrene-butadiene rubber, and compared with pure styrene-butadiene rubber, the mechanical performance, the wet-skid resistant performanceand the rolling resistance of the white carbon black modified styrene-butadiene rubber are remarkably improved.
Owner:BEIJING UNIV OF CHEM TECH

Silica containing rubber composition

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.
Owner:THE GOODYEAR TIRE & RUBBER CO
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