Disclosed herein are rubber compositions comprising: (a) natural rubber, polyisoprene, or a combination thereof; (b) at least one conjugated diene monomer containing polymer or polymer; (c) a first silica filler having a BET surface area of at least 220 m.sup.2/g; (d) a second silica filler having a BET surface area lower than that of the first silica filler and greater than 135 m.sup.2/g; and (e) optionally carbon black filler.

A variety of methods/systems/apparatus/compositions are disclosed, including, in one embodiment, a method including introducing a polymeric material, an unsaturated compound, and an olefin cross metathesis catalyst into a reactor, wherein the polymeric material comprises a carbon black filler; reacting at least a portion of the polymeric material with the unsaturated compound in the presence of the olefin cross metathesis catalyst to produce at least metathesis oil and metathesis carbon black, wherein the metathesis oil comprises an olefin cross metathesis product of the polymeric material and the unsaturated compound; and separating at least a portion of the metathesis carbon black.

A shaped article is formed from a cured rubber composition comprising EPDM and a diene rubber. The shaped article exhibits a coefficient of friction greater than 0.1.

A water-based hydrogel polymer coating and a method of application to natural rubber or other elastomeric latex products are provided. The water-based hydrogel polymer is mixed with a blend of at least one elastomeric material to provide a hydrogel polymer blend composition. The water-based hydrogel polymer blend composition is applied in a single application to an elastomeric article, such as gloves, without additional solvents in the polymer blend composition and without a separate acid or chemical priming step. The water-based hydrogel coating herein provides increased lubricity to facilitate improved wet and dry donning of the elastomeric article.

A foam made of a specific material having superior properties and cosmetics comprising the foam are disclosed.

Epoxidized natural rubber compositions, elastomer blends containing an epoxidized natural rubber, and materials containing carbon black and epoxidized natural rubber.

An object of the present invention is to provide a rubber composition from which a vulcanized rubber having excellent wear resistance and a high breaking elongation and a high breaking stress can be obtained. Further, another object of the present invention is to provide a vulcanized rubber obtained by vulcanizing the rubber composition, and a rubber product and a tire comprising the rubber composition or the vulcanized rubber.

The rubber composition of the present invention includes a rubber component (A), a foaming agent (B), and a polyhydric alcohol (C) having 3 or more hydroxyl groups per molecule, wherein the rubber component (A) comprises 30% by mass or more of natural rubber based on the entire rubber component, and a content of the polyhydric alcohol (C) is 1 to 6 parts by mass per 100 parts by mass of the rubber component (A).

A coating including a substrate and a plurality of hydrophobic silver particles disposed on the substrate. The contact angle of the coating with water at room temperature is between 152 and 162 and the resistance value of the coating is between 10.sup.1 and 10.sup.3.

Disclosed herein are methods of mixing at least a solid elastomer, a wet filler comprising carbon black and a liquid present in an amount of at least 20% by weight based on total weight of wet filler, and a linking agent. In one or more mixing steps, the method further comprises mixing the at least the solid elastomer, the wet filler, and the linking agent to form a mixture, and removing at least a portion of the liquid from the mixture by evaporation. The method further comprises discharging, from the mixer, the composite comprising the filler dispersed in the elastomer at a loading of at least 20 phr. Also disclosed are composites, vulcanizates, and articles formed therefrom.

A method for preparing a vulcanizable composition of matter, the method comprising mixing, within a first mixing step, rubber, silica, and silica coupling agent to form a first masterbatch composition, adding nicotinamide to the first masterbatch composition and mixing within a second mixing step to form a second masterbatch composition, and adding a curative to the second masterbatch composition and mixing within a final mixing step.