Showing papers by "Cabot Corporation published in 2010"

Aerogel compositions and methods of making and using them

Abstract: Compositions include an aerogel component and have low thermal conductivity. Methods for preparing slurries or composites include, for example combining the aerogel component with a surfactant, binder and other ingredients, such as, for instance, fibers. The compositions can be slurries that can be used in coating applications or self supporting rigid composites.

Aerogel composites and methods for making and using them

Abstract: Composites such as self-supporting rigid composites that include aerogel have low thermal conductivity and attractive mechanical properties. Methods for preparing such composites include, for example, combining an aerogel-containing material with a binder to form a slurry and allowing the slurry to harden. At least part of the hardening process in conducted under compression.

Compositions comprising silane modified metal oxides

Abstract: The present invention relates to a composition comprising a silane modified metal oxide, wherein the silane modified metal oxide comprises a metal oxide having attached at least one silyl group, and wherein the silyl group comprises at least one —SO 3 − M + , —OSO 3 − M + , —SSO 3 − M + , —NHSO 3 − M + , —NR′SO 3 − M + , —NR′ 3 + A − , or -Q + A − group. R′, which can be the same or different, is a branched or unbranched, substituted or unsubstituted alkyl, alkenyl or alkynyl group or a substituted or unsubstituted aryl, heteroaryl, alkylaryl; or arylalkyl group, M + is a cationic counterion, and A − is a anionic counterion. The present invention further relates to the silane modified metal oxide used in the disclosed chemical mechanical polishing composition.

Diesel oxidation catalysts

Abstract: A catalyst composition comprises a particulate support and catalyst nanoparticles on the particulate support. The catalyst nanoparticles comprise an alloy of platinum and palladium in an atomic ratio of from about 25:75 to about 75:25 and are present in a concentration of between about 3 and about 10 wt % weight percent of the catalyst composition. The catalyst composition has an X-ray diffraction pattern that is substantially free of the (311) diffraction peak assignable to PtxPd1-x, where 0.25≦x≦0.75.

Lead-Acid Batteries and Pastes Therefor

Abstract: A paste suitable for a negative plate of a lead-acid battery comprises lead oxide and composite particles comprising carbon and silica

Methods for making aerogel composites

Abstract: Composites such as self-supporting rigid composites that include aerogel have low thermal conductivity and attractive mechanical properties. Methods for preparing such composites include, for example, combining an aerogel-containing material with a binder to form a slurry and allowing the slurry to harden. At least part of the hardening process in conducted under compression.

High surface area and low structure carbon blacks for energy storage applications

Abstract: The present invention, in part, relates to a carbon black having a) a nitrogen BET surface area (BET) of from about 600 m 2 /g to about 2100 m 2 /g, b) a CDBP value in mL/100 g of from about (−2.8+(b*BET)) to about (108+(b*BET)), where b is 0.087 and BET is expressed in m2/g, and c) an apparent density (p, g/cm 3 ) of at least about 0.820+q*BET, where q=−2.5×10 −4 , as determined at a compressive force (P) of 200 kgf/cm 2 on dry carbon black powder. Energy storage devices, such as electrochemical double layer capacitors (EDLC's), containing the carbon black are also disclosed. Methods for making the carbon blacks and EDLC's made with them are also provided.

Single-walled carbon nanotube formation on iron oxide catalysts in diffusion flames

Abstract: Single-walled carbon nanotubes (SWCNTs) are shown to grow rapidly on iron oxide catalysts on the fuel side of an inverse ethylene diffusion flame. The pathway of carbon in the flame is controlled by the flame structure, leading to formation of SWCNTs free of polycyclic aromatic hydrocarbons (PAH) or soot. By using a combination of oxygen-enrichment and fuel dilution, fuel oxidation is favored over pyrolysis, PAH growth, and subsequent soot formation. The inverse configuration of the flame prevents burnout of the SWCNTs while providing a long carbon-rich region for nanotube formation. Furthermore, flame structure is used to control oxidation of the catalyst particles. Iron sub-oxide catalysts are highly active toward SWCNT formation while Fe and Fe2O3 catalysts are less active. This can be understood by considering the effects of particle oxidation on the dissociative adsorption of gas-phase hydrocarbons. The optimum catalyst particle composition and flame conditions were determined in near real-time using a scanning mobility particle sizer (SMPS) to measure the catalyst and SWCNT size distributions. In addition, SMPS results were combined with flame velocity measurement to measure SWCNT growth rates. SWCNTs were found to grow at rates of over 100 μm/s.

Formation of latex coagulum composite

Abstract: A method of producing a coagulated latex composite. A coagulating mixture of a first elastomer latex and a particulate filler slurry is flowed along a conduit, and a second elastomer latex is introduced into the flow of the coagulating mixture.

Thermally Stable SERS Taggants

Abstract: An optically active particle and a method of manufacturing said particles, plus methods of tagging a material of interest with said particles are disclosed. The particle comprises a surface-enhanced spectroscopy (SES) active core and a SES active reporter associated with the SES core wherein the particle produces a measurable and thermally stable SES spectrum upon optical interrogation. As used in the disclosure, thermally stable may be defined as maintaining a measurable SES spectrum after the particle or any material tagged with the particle has been exposed to a temperature substantially higher than room temperature.

Improving operating discipline through the successful implementation of a mandated behavior-based safety program

Abstract: This article describes the improvement of a manufacturing site's safety performance that can be attributed, in part, to the successful implementation of a mandated behavior-based safety (BBS) program. As has been discussed in prior articles, improving operating discipline (improving the conduct of operations) will contribute to reducing process safety, health and environmental risks. The BBS program implementation, with its expectation that each employee complete and submit at least one safety observation a month, coincided with several other significant safety initiatives. These other initiatives required employee involvement from all levels of the organization, including implementing process safety management elements, implementing the site's “principles of operation,” and performing daily job safety analyses. This article will describe how the site's BBS observation program has evolved over the last decade, how several human-related issues were overcome, and provides specific examples of some of the changes implemented as a result of the observations. In conclusion, this article shows how direct management involvement and support and increased personnel involvement has improved safety awareness, knowledge, and commitment to help reduce manufacturing risks. “You can observe a lot just by watching.”—Yogi Berra © 2010 American Institute of Chemical Engineers Process Saf Prog, 2010

A particle containing a hydrophobic region and a hydrophilic region and methods to make same

Abstract: A particle containing a hydrophobic region and a hydrophilic region, products containing the same, a process of making the same, and uses thereof are described. A process of making the particle is also described wherein UV/Ozone techniques can be used to control the depth of organics removal from a porous hydrophobic particle such as an aerogel. The particles can be used in a variety of applications, such as a monolith, a building block, an optical waveguide, a blanket, a matting agent, a structural composite panel, a glass-fiber reinforced panel, a window, a separation wall, a composite wall, a temperature insulation panel, a sound insulation panel, a moisture resistant article, a syntactic foam, or any product of manufacture containing the particles.

Particulate compositions having plural responses to excitation radiation

Abstract: A particulate composition comprises a plurality of particles wherein at least one of the particles comprises at least two different crystalline and/or glass phases, each phase comprising a host lattice and a dopant sensitive to electromagnetic radiation The different phases simultaneously produce different responses on exposure to photons of the same energy, whereby the output from the particulate composition when exposed to said photons is the sum of the responses from the different phases

Low Voltage Specific Charge (CV/g) Loss in Tantalum Capacitors

Abstract: The systematic decrease in charge per unit weight (CV/g) in electrolytic tantalum capacitors as a function of decreasing anodization voltage is explored from both experimental and theoretical viewpoints for a range of tantalum particle sizes. Analysis by transmission electron microscopy shows that a native thermal oxide about 3.3 nm in thickness is present on the tantalum surface before anodization and that the thickness is independent of tantalum particle size. Studies in which the initial oxide thickness is altered via a preanodization heat-treatment show that the anodic oxide thickness becomes independent of the initial thermal oxide thickness once its thickness is exceeded. A theoretical model based on a cylindrical geometry explains the loss in the CV/g with decreasing anodization voltage and attributes the behavior to the 3.3 nm oxide thickness corresponding to zero anodization voltage.

Elastomer composite blends, method and apparatus for producing same

Abstract: A wet mix elastomer composite comprising carbon black dispersed in an elastomer including a blend of a natural rubber and styrene-butadiene rubber. When the wet mix elastomer composite is processed with CTV Method 1, the vulcanized wet mix elastomer composite exhibits a resistivity that A) has a natural logarithm satisfying the equation 1n(resistivity) ≥ -0.1(loading) + x, where x is 14, or B) is at least 2.9 times greater than the resistivity of a vulcanized dry mix elastomer composite having the same composition and prepared using Comparative CTV Method 1.

High loading carbon black masterbatch for pressure pipe applications

Abstract: A masterbatch for pressure pipe applications is disclosed The masterbatch includes carbon black in a concentration that is in excess of 40 weight percent (wt %) of the masterbatch, and a high-density polyethylene (HDPE) carrier resin in a concentration that is in the range of 40 to 60 wt % of the masterbatch and has a melt flow index above 100 g/10 min at 216 kg/190° C and a weight average molecular weight (Mw) that is less than 100000 The masterbatch may further include one or more additives (eg, lubricant and/or an anti-oxidant) In some embodiments, microdispersion of carbon black in the masterbatch is rated less than 3 (according to ISO 18553) In one specific case, 98% or more of observed carbon black agglomerates are less than 30 microns The masterbatch may be included, for example, in a pressure pipe compound where it is diluted with a base polymer

Modified pigment containing inkjet ink compositions having a reduced conductivity increase

Abstract: The present invention relates to a modified pigment comprising a pigment having attached at least one salt of a geminal bisphosphonic acid group or partial esters thereof, as well as to dispersions and inkjet ink compositions comprising such modified pigments. Preferably the salt comprises a quaternary ammonium counterion.

Inkjet ink compositions comprising azo pigments

Abstract: Inkjet ink compositions comprising a liquid vehicle, an azo pigment, and a synergist are described. The colorant of the azo pigment and the synergist have specific structural features that, in combination, can be used to form an inkjet ink composition having long term stability in a variety of ink vehicles.

Chemical toners comprising modified pigments

Abstract: The present invention relates to chemical toner compositions comprising a resin and a polymer modified pigment comprising a pigment having attached at least one polymeric group. The polymer modified pigment comprises the reaction product or combination product of a modified pigment comprising the pigment having attached at least one organic group which comprises at least one first functional group, and at least one polymer comprising at least one second functional group.

Chiral Amine-Induced Stereoselectivity in trans-β-Lactam Formation via Staudinger Cycloaddition.

Abstract: A series of chiral trans-β-lactams was obtained via Staudinger cycloaddition with low to moderate diastereoselectivity (up to 54% de) induced by a chiral amine component of the imine. It was shown that the direct connection of nitrogen to a chiral centre is crucial to induce chirality; moderate asymmetric induction was achieved by using isomeric 1-phenylethylamines, which are among the cheapest chiral sources on the market, while low diastereoselectivity was obtained from 3-aminomethylpinane, where the chiral centres are distant from nitrogen by a methylene group. It was shown, that an increase of the reaction temperature from 110 °C to 140 °C led to commensurable results but speeded-up the transformation significantly. The absolute configurations of phenylethylamine derivatives were determined by X-ray analysis of selected samples.