Methods to make a silica elastomer composite with a destabilized dispersion of silica are described, along with silica elastomer composites made from the methods. The advantages achieved with the methods are further described.

Disclosed are a method of preparing a resin powder and an integrated reactor for the same. When a coagulation process is performed using an acidic coagulant in the integrated coagulator for latex coagulation and aging according to the present invention, a remaining acidic coagulant is also removed from a reactor through neutralization, and thus, a resin powder having enhanced moist-heat resistance and thermal stability may be prepared.

The present invention is directed to a plug for sealing a puncture in a tyre, whereby the plug comprises a head portion and a tail portion, the head portion comprising: a porous material that comprises open pores and capable of absorbing >0.02 grams of water per gram of porous material; and an accelerant selected from the group consisting of a salt, a polar solvent, an acid, and any combinations thereof, wherein the accelerant is retained in the pores of the porous material and is configured to react on contact with a curable sealant selected from the group consisting of anionic stabilized sealants, steric stabilized sealants and anionic colloidal dispersions thereby reducing curing time of the sealant, and wherein the porous material does not comprise the sealant.

A synthetic latex composition, comprising rubber particles, natural surfactants, a novel acid stable surfactant and water for use in agglomeration processes. The invention is also directed to a reproducible method for preparing agglomerated latex particles to control and achieve particle size targets within a specified range and distribution, by utilizing the inventive latex composition and process conditions, but without the use of elevated temperature, pressurization or mechanical agitation of prior art processes.

A polymer composition may include at least one ethylene-vinyl acetate copolymer and at least one farnesene polymer. A process for producing a polymer composition may include mixing the at least one ethylene-vinyl acetate copolymer with the at least one farnesene polymer, thereby producing the polymer composition that includes at least one ethylene-vinyl acetate copolymer and at least one farnesene polymer.

The present disclosure provides compositions and products formed therefrom. In particular, the disclosure provides elastomeric latex articles, such as gloves and condoms, that can exhibit a desired combination of properties that can be correlated to suitable strength and softness.

Edge separation in a turned-up end portion (5E) of a carcass ply (5) is suppressed. In a pneumatic tire comprising a bead core (4) embedded in a bead portion (3) and a carcass ply (5) turned up and locked around the bead core (4), a rubber sheet (10) is prepared using a wet masterbatch containing natural rubber and/or polyisoprene rubber and carbon black, and the rubber sheet (10) is arranged on at least one of front and back sides of the turned-up end portion (5E) of the carcass ply (5).

A laminate having high ozone crack resistance and excellent in flexibility and fatigue resistance is provided. The laminate includes: a coating film 12 containing modified polyvinyl alcohol grafted by a functional group that is linear-chain, cycloaliphatic, branched, or aromatic and has a molecular weight of 20 to 10000; and a rubber layer 11 in contact with the coating film 12.

The present invention relates to a process for making a polymer masterbatch with silica nanoparticles highly uniformly dispersed therein by using a stable aqueous emulsion of compatibilized silica nanoparticles, the sizes of which are mechanically reduced to nanoscales. Adequate reduction of the silica particles to nanoscales is essential for the formation of a desired emulsion of highly stability. The said emulsion of compatibilized silica nanoparticle can be easily mixed under mild conditions with a polymer in latex form, which can be high purity natural rubber, synthetic rubber and/or a blend thereof. The bifunctional organosilane coupling agent bonded-Silica nanoparticles are subsequently incorporated into the rubber polymer network during coagulation with formic acid. The inventive rubber-silica masterbatch thus obtained is useful for manufacturing rubber and other polymer composite products.

A synthetic latex composition, comprising rubber particles, natural surfactants, a novel acid stable surfactant and water for use in agglomeration processes. The invention is also directed to a reproducible method for preparing agglomerated latex particles to control and achieve particle size targets within a specified range and distribution, by utilizing the inventive latex composition and process conditions, but without the use of elevated temperature, pressurization or mechanical agitation of prior art processes.