Showing papers by "Cabot Corporation published in 2008"

Architectural membrane structures and methods for producing them

Abstract: An architectural membrane structure preferably includes an aerogel material disposed, for example, between two outer layers. The aerogel can be in monolithic or granular form or can be present in an aerogel composite. A method for manufacturing an architectural membrane structure includes securing an insert, e.g., an aerogel blanket, composite or granular aerogel, between a first and second layer. The architectural membrane structure can be used as a tensioned panel in envelopes such as roofing, overhangs, canopies or in other architectural or structural fabric applications.

Catalyst coated membranes and sprayable inks and processes for forming same

Abstract: The invention is directed to highly porous catalyst coated membranes and to sprayable inks and processes for forming catalyst coated membranes. In one aspect, the invention is to a sprayable ink, comprising catalyst particles, polymer electolyte ionomer, and a vehicle for dispersing the catalyst particles and polymer electolyte ionomer. In another aspect, the process comprises the steps of depositing an ink comprising catalyst particles and a vehicle onto a membrane and vaporizing from 40 to 95 weight percent of the vehicle from the sprayed ink under conditions effective to form a catalyst layer on the membrane. Preferably, the depositing and vaporizing steps are alternated to form multiple stacked catalyst layers on the membrane.

An elastomer composite and method for producing it

Abstract: An elastomer composite includes the coagulated product of a mixture of a particulate slurry and a latex blend comprising skim latex and at least one of field latex and latex concentrate.

Aerogel particles and methods of making same

Abstract: Aerogel particles having a mean particle size less than 1 micron, products containing the same, processes of making the same, and uses thereof are described. A process of making the particle is also described wherein starting aerogel particles are homogenized or wet milled. The starting aerogel particles can be surface treated during the milling process to prevent agglomeration or aggregation. The aerogel particles can be used in a variety of products and applications.

High Surface Area Graphitized Carbon and Processes for Making Same

Abstract: The invention is directed to high surface area graphitized carbon and to processes for making high surface area graphitized carbon. The process includes steps of graphitizing and increasing the surface area of (in either order) a starting carbon material to form high surface area graphitized carbon. The step of increasing the surface area optionally comprises an oxidizing step (e.g., through steam etching) or template removal from composite particles. The invention is also directed to catalyst particles and electrodes employing catalyst particles that are formed from the high surface area graphitized carbon.

Hydrophobic-treated metal oxide

Abstract: This invention provides metal oxide particles surface-treated with a hydrophobicity-imparting agent, methods of making such, and toner compositions comprising the same.

Thermal interface materials

Abstract: The present invention relates to thermal interface materials comprising a filler dispersed in a polymer, wherein the filler has an average aggregate particle size of less than or equal to 1 micron. Preferably the filler is a synthetic alumina, such as fumed alumina.

Tantalum Powder and Methods Of Manufacturing Same

Abstract: Tantalum powder capable of providing a small-sized tantalum electrolytic capacitor while maintaining capacity is described. Tantalum powder in the present invention can be characterized in that the CV value is from 200,000 to 800,000 μFV/g, when measured by the following measuring method. Pellets are produced by forming tantalum powder such that the density is 4.5 g/cm3, then the pellets are chemically converted in a phosphoric acid aqueous solution of concentration 0.1 vol. % at a voltage of 6V and a current of 90 mA/g, and the chemically converted pellets are used as measuring samples to measure the CV value in a sulfuric acid aqueous solution of concentration 30.5 vol. % at a temperature of 25° C. under a frequency of 120 Hz and a voltage of 1.5V.

Filling fenestration units

Abstract: A method for fabricating an insulated system such as, for instance, an insulated window unit, includes introducing an insulating material between adjacent walls (12a, 12b) and stabilizing the system. Particulate insulators preferably are introduced in the system by filling an expanded internal volume. Stabilization of the system can be carried out by reducing the pressure within the internal volume. A stabilized insulated system is fabricated by introducing an insulating material between adjacent walls and stabilizing the system. Also disclosed are processes and equipment for filling insulated systems, such as fenestration units, and insulated systems comprising mixed insulating' materials.

Syntactic foam compositions, pipelines insulated with same, and method

Abstract: Syntactic foams and thermal insulation as described containing epoxy resin, hollow microspheres, and dried sol-gel or fumed metal oxide for forming a thermal insulating layer on a substrate such as a pipeline Methods for forming such thermal insulating layers are also described, which can include formulating with blowing agents for forming closed cells in the finished insulating foam

Nanoglass and flame spray processes for producing nanoglass

Abstract: The invention is to processes for producing a nanoglass powder batches and to powder batches formed by such processes. In one embodiment, the process comprises the steps of providing a precursor medium comprising a first metal oxide precursor to a first metal oxide, a second metal oxide precursor to a second metal oxide, and a liquid vehicle; and flame spraying the precursor medium under conditions effective to form aggregated nanoglass particles comprising the first and second metal oxides, wherein the aggregated nanoglass particles have an average primary particle size of from 25 nm to 500 nm. The aggregated nanoglass particles preferably have an average aggregate particle size of from 50 nm to 1000 nm and may be amorphous or crystalline.

Filler system including densed fumed metal oxide

Abstract: A curable coating composition includes a polymer precursor and at least 6% by weight of a densed fumed metal oxide having a DBP number of at least 65 % of the DBP number of an undensed fumed metal oxide of the same composition, surface area, and surface chemistry. The curable coating composition is at most 70% as viscous as a composition having the same components and the same weight fraction of the undensed fumed metal oxide.

Method of preparing a pigment composition

Abstract: The present invention relates to a method of preparing a pigment composition comprising the steps of combining at least one polyamine, at least one pigment, and at least one polymer having at least one carboxylic acid group or salt thereof. Various embodiments of this method are disclosed. The present invention further relates to a pigment composition and uses thereof, such as inkjet ink compositions.

Modified colored pigments

Abstract: The present invention relates to a modified colored pigment comprising a colored pigment having an attached organic group. The organic group is attached to the colored pigment via at least one carbon atom of a C-C single bond or double bond, wherein the C-C single bond or double bond is not a component of an aromatic system. The organic group further comprises at least one activating group on at least one carbon atom of the C-C single bond or double bond. A method of preparing a modified colored pigment is also disclosed, as are aqueous and non-aqueous dispersions, e.g., including ink jet inks, comprising the modified colored pigments.

Compositions having multiple responses to excitation radiation and methods for making same

Abstract: The present invention relates to a composition having a first response to a first electromagnetic radiation and, after intermediate exposure to a second electromagnetic radiation, a second response to the first electromagnetic radiation, different from the first response. In one aspect, the composition exhibits a regenerated first response to the first electromagnetic radiation after exposure to a third electromagnetic radiation.

Processes for forming photovoltaic conductive features from multiple inks

Abstract: Photovoltaic conductive features and processes for forming photovoltaic conductive features are described. The process comprises (a) providing a substrate comprising a passivation layer disposed on a silicon layer; (b) depositing a surface modifying material onto at least a portion of the passivation layer; (c)depositing a composition comprising at least one of metallic nanoparticles comprising a metal or a metal precursor to the metal onto at least a portion of the substrate; and (d) heating the composition such that it forms at least a portion of a photovoltaic conductive feature in electrical contact with the silicon layer, wherein at least one of the composition or the surface modifying material etches a region of the passivation layer. When the surface modifying material is a UV-curable material, the process comprises the additional step of curing the UV-curable material.

Process to form modified pigments

Abstract: A method of forming a modified pigment comprising a pigment having attached at least one polymeric group is described. In one embodiment, a polymer, a pigment, a linking agent, and an optional activating agent are combined, and the linking agent is reacted with the polymer and the pigment to form the modified pigment. In another embodiment, a polymer melt is formed comprising a polymer and an optional plasticizer, and the polymer melt, a pigment, and an optional activating agent are combined, in any order, under high-intensity mixing conditions. Also disclosed are modified pigments having specific properties and inkjet ink compositions comprising them.

Method of Preparing a Nanoparticle Dispersion of a Modified Metal Oxide

Abstract: The present invention relates to a method of preparing polymer compositions comprising modified metal oxides in a polymer wherein a nanoparticle dispersion of a metal oxide in a non-aqueous solvent is combined with at least one coupling agent to form a nanoparticle dispersion of a modified metal oxide in the non-aqueous solvent. The nanoparticle dispersion is then combined with a polymer followed by the removal of the non-aqueous solvent or, alternatively, combined with a monomer, which is polymerized to form the polymer and removal of the solvent, in any order. Also disclosed are polymer compositions prepared by this method.

Coating composition incorporating a low structure carbon black and devices formed therewith

Abstract: A black matrix or coating includes carbon black including a first carbon black having an h number from 30 mg/g to 200 mg/g and a DBP from 20 cc/100g to 45 cc/100g.

Low structure carbon black and method of making same

Abstract: A carbon black having an I 2 number from 30 mg/g to 200 mg/g and a DBP from 20 cc/100 g to 40 cc/100 g.

Process for producing exhaust treatment catalyst powders, and their use

Abstract: A process is described for producing a powder batch comprises a plurality of particles, wherein the particles include (a) a first catalytically active component comprising at least one transition metal or a compound thereof; (b) a second component different from said first component and capable of removing oxygen from, or releasing oxygen to, an exhaust gas stream; and (c) a third component different from said first and second components and comprising a refractory support. The process comprises providing a precursor medium comprising a liquid vehicle and a precursor to al least one of said components (a) to (c) and heating droplets of said precursor medium carried in a gas stream to remove at least part of the liquid vehicle and chemically convert said precursor to said at least one component.

Light to heat conversion layer incorporating modified pigment

Abstract: PROBLEM TO BE SOLVED: To provide a thinner and smoother LTHC layer for radiation induced thermal transfer without sacrificing optical density for use in light induced thermal transfer.SOLUTION: A light-to-heat conversion (LTHC) layer comprises: a) a combination product of a dispersant and a modified pigment comprising i) a pigment having at least one organic group attached comprising an ionic or an ionizable group or ii) an oxidized carbon black; or b) a modified pigment comprising a pigment having at least one polymer attached; and a matrix in which the a) combination product or the b) modified pigment is disposed. The LTHC layer is configured to a) be at most about 4 micrometers thick, and b) have a surface roughness of at most 7%.

Electrocatalyst compositions and processes for making and using same

Abstract: In a method of producing a particulate electrocatalyst composition, a precursor medium comprising at least a first metal precursor, a liquid vehicle, and a substrate precursor to substrate particles is atomized into precursor droplets. The droplets are then heated to a reaction temperature of not greater than 700°C to form composite particles comprising said first metal at least partly in an oxide form dispersed on said substrate particles. The composite particles are then collected and are heated at a first treatment temperature no greater than 250°C in the presence of a reducing atmosphere to at least partly convert said oxide form to the metal.

Processes for controlling catalyst particle morphology

Abstract: Processes for forming catalyst particles utilizing a defoamer are described. Also described are processes for forming catalysts, where the processes comprise providing a correlation between defoamer concentration and catalyst particle morphology, and determining an amount of defoamer to include in a precursor composition to obtain the target morphology based on the correlation.

Elastomer composite materials in low density forms and methods

Abstract: A bale of elastomer composite is formed of elastomer and filler, the bale having a void volume of at least 3%. In another aspect, a container is provided, at least a portion of the container being occupied by elastomer composite pieces of elastomer and filler, wherein the occupied portion of the container has a void volume of at least 3%.

Inkjet ink compositions comprising polymer modified pigments and methods of preparing the same

Abstract: The present invention relates to an inkjet ink composition comprising a liquid vehicle and at least one polymer modified pigment. In one embodiment, the polymer modified pigment comprises the combination product of a pigment, a polymer, and a base, wherein the polymer is a styrene-maleic anhydride polymer or an alternating copolymer comprising at least one segment having the formula —[HB-A] x -. In a second embodiment, the polymer modified pigment comprises a pigment and a polymer, wherein the polymer is a styrene-maleic acid polymer or salt thereof or an alternating copolymer comprising at least one segment having the formula —[HB-A′] x -. Methods of preparing the inkjet ink compositions are also disclosed.

Coated nickel-containing powders

Abstract: Nickel powder batches and methods for producing nickel powder batches. The powder batches include particles having a small particle size, narrow size distribution and a spherical morphology. The present invention is also directed to devices incorporating the nickel metal powders.

Membrane electrode assembly for fuel cell

Abstract: A membrane electrode assembly comprises (a) a solid electrolyte polymer membrane; (b) an anode electrocatalyst layer disposed at one surface of the membrane and comprising a first electrocatalyst composition comprising carbon substrate particles and nanoparticles comprising an alloy of platinum and ruthenium disposed on the surface of the substrate particles; (c) a cathode electrocatalyst layer disposed at an opposite surface of the membrane, the cathode layer comprising a second electrocatalyst composition different from the first electrocatalyst composition and comprising carbon substrate particles and nanoparticles comprising platinum disposed on the surface of the substrate particles; and (d) gas diffusion layers disposed over each of the anode and cathode electrocatalyst layers. When operating in a direct methanol fuel cell with an active area of 25 cm2 and under conditions including a supply of IM methanol to the anode electrocatalyst layer at a rate of 3 ml per minute, a supply of air to the cathode electrocatalyst layer at a rate of 400 seem, the membrane electrode assembly provides an output voltage of 0.4 volt and a temperature of 7OoC, provides a power output in excess of 120 mW/cm2 and a normalized performance in excess of 34 mW/mgPt.

Niobium suboxide- and niobium-tantalum-oxide-powders and capacitor anodes produced thereof

Abstract: Nb1-xTaxO powder wherein x is 0.1 to 0.5 is described. Further, this powder, as well as niobium suboxide powders, can be doped with at least one dopant oxide. Pressed bodies of the powder, sintered bodies, capacitor anodes, and capacitors are also described.