Disclosed is a rubber composition for tire treads and a tire manufactured using the same. The rubber composition for tire treads includes 50 to 200 parts by weight of a wet masterbatch, 60 to 70 parts by weight of a raw rubber, and 50 to 200 parts by weight of a carbon black, the wet masterbatch being prepared by reacting 50 to 200 parts by weight of a carbon black, 20 to 100 parts by weight of a plant based resin and 50 to 200 parts by weight of a processing oil with respect to 100 parts by weight of a styrene-butadiene latex, according to a batchwise method. Accordingly, high grip performance is exhibited under a condition of heavy load, high slip and high speed, thereby being applicable to an ultra-high performance tire.

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.

The present disclosure relates to a polypropylene composition resistant to thermo-oxidative aging, a preparation method and a use thereof. The polypropylene composition resistant to thermo-oxidative aging comprises polypropylene, a toughener, a filler, carbon black and other additive or additives. The polypropylene composition resistant to thermo-oxidative aging provided in the present disclosure has a better thermo-oxidative aging resistance by adding specific carbon black, without any complicated surface modification for the carbon black, and the polypropylene composition can be widely used in auto parts or cables.

Disclosed herein are compositions comprising an ionic crosslinking agent (e.g., compositions comprising crosslinked products prepared by ionically crosslinking a polymer derived from styrene and optionally butadiene using an ionic crosslinking agent). The present disclosure also relates to methods of making the disclosed compositions. The compositions disclosed herein can be used in a variety of applications including, but not limited to, asphalt compositions, paints, coatings, carpet compositions, paper binding and coating compositions, foams, or adhesives.

A sound-absorbing material block, a method for preparing the same and application thereof are provided. The sound-absorbing material block includes three-dimensional open-cell foam, sound-absorbing material powder, a binder, a gel, and a cross-linking agent. The sound-absorbing material powder is bonded to each other and connected to the three-dimensional open-cell foam by means of the gel, the cross-linking agent, and the binder, by mass of the sound-absorbing material powder, the gel accounts for 1 wt % to 5 wt % of the sound-absorbing material powder, and the binder accounts for 1 wt % to 8 wt % of the sound-absorbing material powder, and by mass of the gel, the cross-linking agent accounts for 1 wt % to 10 wt % of the gel. The sound-absorbing material block according to the present disclosure reduces an additive amount of the binder, and significantly improves sound-absorbing performance and strength of the material block.