Showing papers by "Cabot Corporation published in 2005"

Multi-component particles comprising inorganic nanoparticles distributed in an organic matrix and processes for making and using same

Abstract: Multi-component particles comprising inorganic nanoparticles distributed in an organic matrix and processes for making and using same. A flowing aerosol is generated that includes droplets of a precursor medium dispersed in a gas phase. The precursor medium contains a liquid vehicle and at least one precursor. At least a portion of the liquid vehicle is removed from the droplets of precursor medium under conditions effective to convert the precursor to the nanoparticles or the matrix and form the multi-component particles.

Printable conductive features and processes for making same

Abstract: Processes for forming conductive features from one or more inks and conductive features formed from the processes. In one aspect, the process includes a step of applying a first ink comprising a metal precursor to at least a portion of a first substrate to form an at least partially coated substrate. In a second step, the first ink is contacted with a reducing agent, optionally derived from a second ink, under conditions effective to reduce the metal in the metal precursor to its elemental form.

Aerogel Containing Blanket

Abstract: A process of producing a blanket is described and can involve forming an aqueous slurry of hydrophobic aerogels, fibers, and at least one wetting agent, drying the aqueous slurry to form a substantially dried product, and calendaring the substantially dried product to form the blanket. The blanket can be used in a variety of applications, including windows.

ATRP of butyl acrylates from functionalized carbon black surfaces

Abstract: The functionalization of carbon black surface with atom transfer radical polymerization (ATRP) initiating sites and subsequent ATRP of n-butyl acrylate (n-BA) and t-butyl acrylate (t-BA) from the surface of carbon black is reported. The polymerizations were carried out using CuBr/N,N,N′,N″,N″-pentamethyldiethylenetriamine as the primary catalytic system in anisole at 70 °C. The initiator density on carbon black surface was tuned and the effect of initiator density on the polymers grafted on the surface was illustrated. Polymerizations were also performed in the presence of a sacrificial initiator to indirectly monitor the molecular weight evolution of polymers formed in the system. Block copolymerization of t-BA initiated from poly(n-BA) grafted carbon black was conducted to achieve water-dispersible carbon black composites after cleavage of the t-butyl groups. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 4695–4709, 2005

Method of preparing oxidized modified pigments and inkjet ink compositions comprising the same

Abstract: The present invention relates to oxidized modified pigments and dispersions as well as methods of preparing them. Also disclosed are aqueous inkjet ink compositions comprising oxidized modified pigments.

Modified carbon products and their applications

Abstract: Modified carbon products including a metal group attached to the modified carbon product. The modified carbon products are particularly useful for various applications such as catalysis, electronic conduction, ionic conduction, absorbents, heat transfer and luminescence.

Modified carbon products, their use in fluid/gas diffusion layers and similar devices and methods relating to the same

Abstract: Fuel cell components incorporating modified carbon products. The modified carbon products advantageously enhance the properties of the components leading to more efficiency within the fuel cell.

Gas dispersion manufacture of nanoparticulates, and nanoparticulate-containing products and processing thereof

Abstract: In one aspect, the present invention relates to a method of making multi-phase particles that include nanoparticulates and matrix, which maintains the nanoparticulates in a dispersed state. A flowing gas dispersion is generated that includes droplets of a precursor medium dispersed in a gas phase. The precursor medium contains liquid vehicle and at least a first precursor to a first material and a second precursor to a second material. The multi-phase particles are formed from the gas dispersion by removing at least a portion of the liquid vehicle from the droplets of precursor medium. The nanoparticulates in the multi-phase particles include the first material and the matrix in the multi-phase particles includes the second material.

Modified carbon products, their use in electrocatalysts and electrode layers and similar devices and methods relating to the same

Abstract: Electrodes and electrocatalyst layers incorporating modified carbon products. The modified carbon products may advantageously enhance the properties of an electrode or electrode layer, leading to more efficiency within the a fuel cell or similar device.

Sputter targets and methods of forming same by rotary axial forging

Abstract: A method of making sputter targets using rotary axial forging is described. Other thermomechanical working steps can be used prior to and/or after the forging step. Sputter targets are further described which can have unique grain size and/or crystal structures.

Method of preparing hydrophobic silica directly from an aqueous colloidal silica dispersion

Abstract: The invention provides a method of preparing hydrophobic silica particles comprising (a) providing an aqueous colloidal silica dispersion comprising about 5-70 wt.% of silica particles having an average overall particle size of about 10-1000 nm, wherein the silica particles comprise surface silanol groups, (b) combining the silica dispersion with about 3-75 µmole/m2 (based on the BET surface area of the silica) of a silyl amine treating agent and optionally with other ingredients to provide a reaction mixture, wherein the reaction mixture has a pH of about 7 or more, and comprises no more than about 50 wt.% of an organic solvent, and (c) drying the dispersion to provide hydrophobic silica particles. The invention further provides a method of preparing a toner composition comprising combining the hydrophobic silica particles as recited above with toner particles to provide a toner composition.

High resistivity compositions

Abstract: The present invention relates to a black matrix formed by applying a curable coating composition onto a substrate to form a curable coating, curing the curable coating imagewise to form a coating, and developing and drying the coating. The curable coating composition comprises a vehicle, a curable resin, and at least one modified pigment comprising a pigment having attached at least one organic group having the formula -X-I or -X-NI, wherein X, which is directly attached to the pigment, represents an arylene or heteroarylene group, an alkylene group, an aralkylene group, or an alkarylene group, I represents a non-polymeric group comprising at least one ionic group or at least one ionizable group, and NI represents a non-polymeric group comprising at least one nonionic group. The curable coating composition, curable coating, and cured coating are also described. Also disclosed is a method of controlling the resistivity of a coating.

Modified carbon products, their use in bipolar plates and similar devices and methods relating to same

Abstract: Bipolar plates incorporating modified carbon products. The modified carbon products advantageously enhance the properties of the bipolar plates, leading to more efficiency within a fuel cell or a similar device.

Measurement of angular emission trajectories for magnetron-sputtered tantalum

Abstract: Sputtering target crystallographic orientation affects film deposition uniformity through the emission trajectories of the sputtered atoms. Understanding the relationship between the crystallographic orientation of the sputtering target and the emission trajectory for the sputtered atoms is important for being able to accurately model film thickness uniformity and step coverage. This paper describes the measurement of atom sputter trajectory from a tantalum single crystal. A quartz crystal monitor is used to detect sputter atom flux as a function of angle. The angular sputter emission measurements are consistent with emission from tantalum single crystals along the 〈111〉 close-packed direction as well as the second close-packed 〈100〉 direction. Best fit of the experimental data occurs when the ratio of the emission probabilities in the 〈111〉 and 〈100〉 directions (P〈111〉/P〈100〉) is 1.4, and the ratio of the major and minor axis for the sputter emission ellipsoid (the b/a ratio) is 1.5.

Carbon black and multi-stage process for making same

Abstract: Methods of producing carbon black in a multi-stage reaction are described. Also described is carbon black formed from the processes.

Tantalum sputtering target and method of fabrication

Abstract: A process is described for processing metal which includes clock rolling a metal plate until the desired thickness is achieved to form a rolled plate. Sputtering targets and other metal articles are further described.

Surface modified carbon products and their applications

Abstract: Modified carbon products including a metal group attached to the modified carbon product. The modified carbon products are particularly useful for various applications such as catalysis, electronic conduction, ionic conduction, absorbents, heat transfer and luminescence.

Inkjet inks comprising multi-layer pigments

Abstract: The present invention relates to multi-layer pigments comprising a core pigment having attached two or more layers of polymer as well as to methods of preparing the multi-layer pigment. Also disclosed are inkjet ink compositions comprising these multi-layer pigments.

High capacitance tantalum flakes and methods of producing the same

Abstract: Methods of maximizing a tantalum capacitor's capacitance are disclosed, as well as tantalum flake powder and anodes. A two step milling process can be used to mill tantalum particles into tantalum flake powder having flakes of the desired thickness. This flake powder can then be pressed and sintered thereby forming an anode. Other flake capacitance methods and products are also described.

High surface area tetragonal zirconia and processes for synthesizing same

Abstract: A zirconia-containing composition and processes for synthesizing same. The composition comprises least about 99.9 percent tetragonal phase zirconia, based on the total crystalline zirconia in the zirconia-containing composition as determined by x-ray diffraction (XRD). The composition also has a substantially spherical morphology and comprises less than 100 wppm chlorine, based on the total weight of the zirconia-containing composition. The zirconia-containing composition has an average surface area of at least 80 m 2 /g and an average particle size of less than about 10 microns.

Ultrasonic method for detecting banding in metals

Abstract: A method for non-destructively detecting the presence of banded regions in a metal is described. The method involves sending an ultrasonic wave into the metal and obtaining reflected signals. The reflected signals are compared with each other to determine variations in signal intensity. A banded region within the metal can be observed as a weaker reflected signal than a reflected backwall signal, thus accurately identifying a location of banding within the metal. Metal articles with a low percent of banding are also described.

Aqueous inkjet ink compositions comprising comb-branched copolymers

Abstract: The present invention relates to an aqueous inkjet ink composition comprising an aqueous vehicle, a modified pigment, and a comb-branched copolymer dispersant. The modified pigment comprises a pigment having attached at least one organic group, wherein the organic group comprises at least one ionic group, at least one ionizable group, or mixtures thereof, and the comb-branched copolymer dispersant comprises an acrylic polymer segment and a polyalkylene oxide segment. Methods to improve the properties of images printed onto glossy and non-glossy media are also disclosed.

Tantalum and other metals with (110) orientation

Abstract: Tantalum metal, niobium metal, alloys thereof and other bcc metals and alloys thereof having a texture of primary or mixed (110) on the surface and/or throughout the thickness of the metal is described. Also described are the processes for making the tantalum metal and other bcc metal with a texture of primary or mixed (110) and the process of making a sputtering target from the tantalum metal or other bcc metal with a texture of primary or mixed (110).

Modified carbon products, their use in proton exchange membranes and similar devices and methods relating to the same

Abstract: Proton exchange membranes incorporating modified carbon products. The modified carbon products advantageously enhance the properties of proton exchange membranes, leading to more efficiency within a fuel cell or similar device.

Metal and oxides thereof and methods to make same

Abstract: Metal oxides and metals are described. The metal oxides and metals, such, as silica, are obtained by removing a removable template to obtain a metal oxide or metal material. Applications and uses of the material are further described.

Methods of forming an alkali metal salt

Abstract: A method of making an alkali metal salt is described and involves (1) reacting at least one alkali metal formate with an least one acid to form an alkali metal salt in the presence of formate ions and (2) substantially removing the formate ions from the alkali metal salt formed in step (1).

Method of preparing an aggregate metal oxide particle dispersion having a desired aggregate particle diameter

Abstract: A method of preparing a dispersion of aggregate metal oxide particles having a pre-selected average aggregate particle diameter comprising pre-selecting a desired percent-reduction in the average aggregate particle diameter of the metal oxide particles, providing a dispersion standard pertaining to a dispersion of the aggregate metal oxide particles, wherein the dispersion standard correlates (i) the solids concentration of the dispersion with (ii) the percent-reduction in the aggregate particle diameter of the aggregate metal oxide particles that occurs when the dispersion is milled in a high-shear mixer, and preparing and milling a dispersion of the aggregate metal oxide particles in a high-shear milling device at a solids concentration that is within 10% of the solids concentration determined by the standard to provide a dispersion of aggregate metal oxide particles having the desired average aggregate particle diameter. Also provided is a method for reducing the average aggregate particle diameter of aggregate metal oxide particles, and a dispersion prepared by the method.

Conversion of Ta2O5 to Ta metal

Abstract: Processes for producing valve metal are described, in which valve metal oxide is converted to valve metal using a vapor-phase transport agent to form a gaseous valve metal species in the presence of a solid getter material. Also described is the valve metal so produced, and anodes prepared from the valve metal, as well as electrolytic capacitors using the anodes.

High purity tantalum for producing sputter targets

Abstract: High purity tantalum metals and alloys containing the same are described. The tantalum metal preferably has a purity of at least 99.995%, and more preferably at least 99.999%. In addition, tantalum metal and alloys thereof are described, which have a texture and which an (100) intensity within any 5% increment of thickness is less than about 15 random, or an incremental log ratio of (111):(100) intensity of greater than about -4.0 or combinations of these properties. Also described are articles and components made from the tantalum metal which include, but are not limited to, sputtering targets, capacitor cans, resistive film layers and wire. Also disclosed is a process for making a sputtering target comprising tantalum metal.