A process is provided for making a carbon-filled rubber having a uniform dispersion of nanometric-sized carbon black particles. Fluffy carbon black is received as a slurry in water and added to latex rubber before or during coagulation in an emulsion styrene butadiene rubber plant, or fluffy carbon black is similarly incorporated in rubber using a different type of rubber-manufacturing process. A uniform dispersion of smaller-than-usual carbon black particles in rubber is formed, which provides a black masterbatch rubber with superior mechanical and rheological properties. Ash and grit is removed from the fluffy carbon black slurry, which further improves the properties of the carbon-filled rubber by reducing defects in the rubber caused by the ash or grit.

Um processo é fornecido fazendo uma borracha carbono-enchida que tem uma dispersão uniforme de partículas nanometric-feitas sob medida do preto de carbono. O preto de carbono macio é recebido enquanto uma pasta na água e adicionada à borracha do latex antes ou durante do coagulation em uma planta de borracha do butadiene do styrene do emulsion, ou o preto de carbono macio são incorporados similarmente na borracha usando um tipo diferente de processo do borracha-rubber-manufacturing. Uma dispersão uniforme de partículas pequeno-do que-usuais do preto de carbono na borracha é dada forma, que fornece uma borracha preta do masterbatch com as propriedades mecânicas e rheological superiores. A cinza e o grão são removidos da pasta macia do preto de carbono, que melhora mais mais as propriedades da borracha carbono-enchida reduzindo defeitos na borracha causada pela cinza ou pelo grão.

 
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