Cabot Corporation

David M Matheu

Martin C Green

Frederick Harry Rumpf

Dhaval Arun Doshi

Theis F Clarke

David C Reynolds

David S Crocker

Yakov E Kutsovsky

Angelica M Sanchez Garcia

Sheldon B Davis

Serguei Nester

Chad James Unrau

David Hunt

Frederick H Rumpf

Theis Clarke

Dhaval Doshi

David Scott Crocker

David O Hunt

Core particles produced in situ or introduced as preformed core particles are coated with a layer of carbon. Non-carbon as well as some carbon-based core materials can be utilized. The resulting carbon coated particles can find applications in rubber products, for instance as reinforcement for tire components.

Carbon-coated particles

Carbon coated particles

Methods for the production of carbon black using an extender fluid(s) are provided as well as methods to control one or more particle properties of carbon black utilizing extender fluids and other techniques.

Method for producing carbon black using an extender fluid

The invention provides fumed silica comprising aggregates that have an aggregate size and a surface area that satisfy particular formulas relating aggregate size to surface area, as well as aggregates that exhibit particular viscosity, power law exponent index, and/or elastic modulus characteristics when dispersed in liquid media. The invention also provides processes of preparing such fumed silica by combining a silica precursor with a stream of combustible gas, combusting the stream, and producing a stream of combusted gas and fumed silica particles, wherein dopants are introduced, the time/temperature profile, or history, of the stream of combusted gas and fumed silica particles is adjusted to allow for post-quench aggregate growth, and/or additional silica precursor is introduced into the stream of combusted gas.

Fumed silica of controlled aggregate size and processes for manufacturing the same

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Somerville, MA, United States of America

David M Matheu