Abstract: Carbon nanostructures are used to prepare curable silicone-based compositions that can be used to manufacture various molded parts for EMI shielding applications. In one illustration, a cured material includes carbon nanostructures, fragments of carbon nanostructures, fractured carbon nanotubes, elongated carbon strands, and/or dispersed carbon nanostructures dispersed in a silicone component.

Abstract: Hydrophobic silica is combined with a polyether in an in situ process for producing thermoplastic polyurethane with superior mechanical properties. The resulting thermoplastic polyurethane may be used in a variety of applications, including midsoles and outsoles in footwear and in wire insulation, hoses, films, wheels and tires, and drilling/mining screens.

Abstract: A photo-curable composition for use in additive manufacturing, said composition comprising: a) at least one photocurable monomer or oligomer; b) a photoinitiator for polymerization of the monomer; and, from 0.01 to 1 wt. %, based on the weight of the composition, of c) CNS-derived materials. Following polymerization, the resulting polymerized composition has a volume resistivity no greater than 105 ohm·cm.

Abstract: An aqueous hydrophobic silica dispersion includes a hydrophilic particulate silica, a hydrophobic particulate silica having a methanol number of at least 60, and a dispersant having at least one cationic or cationizable group and an HLB ratio of 2 to 20.

Abstract: The invention provides a coating comprising fumed silica particles, wherein the fumed silica particles comprise aggregates of primary particles, wherein (a) the primary particles have a bimodal or multimodal particle size distribution representing populations of particles having at least a smallest average primary particle size and a largest average primary particle size, and wherein primary particles having a smaller average primary particle size are attached to primary particles having a larger average primary particle size, or (b) the aggregates have a bi-modal or multi-modal aggregate size distribution, and a carrier. The invention additionally provides a method for preparing a coated article comprising the coating.

Abstract: 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.

Abstract: The invention provides a coating comprising fumed silica particles, wherein the fumed silica particles comprise aggregates of primary particles, wherein (a) the primary particles have a bimodal or multimodal particle size distribution representing populations of particles having at least a smallest average primary particle size and a largest average primary particle size, and wherein primary particles having a smaller average primary particle size are attached to primary particles having a larger average primary particle size, or (b) the aggregates have a bi-modal or multi-modal aggregate size distribution, and a carrier. The invention additionally provides a method for preparing a coated article comprising the coating.

Abstract: 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.

Abstract: 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.

Abstract: 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.