Showing papers by "Cabot Corporation published in 2002"

Low viscosity precursor compositons and methods for the depositon of conductive electronic features

Abstract: A precursor composition for the deposition and formation of an electrical feature such as a conductive feature. The precursor composition advantageously has a low viscosity enabling deposition using direct-write tools. The precursor composition also has a low conversion temperature, enabling the deposition and conversion to an electrical feature on low temperature substrates. A particularly preferred precursor composition includes silver metal for the formation of highly conductive silver features.

Composite aerogel material that contains fibres

Abstract: The present invention relates to a composite material that contains 5 to 97%-vol aerogel particles, at least one binder, and at least one fibre material, the diameter of the aerogel particles being ≧0.5 mm, a process for manufacturing this, and the use thereof.

High purity tantalum, products containing the same, and methods of making the same

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 either have a grain size of about 50 microns or less, or a texture in which a (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 any combination 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, wire, and the like. Also disclosed is a process for making the high purity metal which includes the step of reacting a salt-containing tantalum with at least one compound capable of reducing this salt to tantalum powder and a second salt in a reaction container. The reaction container or liner in the reaction container and the agitator or liner on the agitator are made from a metal material having the same or higher vapor pressure of melted tantalum. The high purity tantalum preferably has a fine and uniform microstructure.

Method for the fabrication of conductive electronic features

Abstract: Precursor compositions in the form of a tape that can be transferred to a substrate and converted to an electronic feature at a relatively low temperature, such as not greater than about 200° C. The tape composition can be disposed on a carrier to form a ribbon structure that is flexible and can be handled in a variety of industrial processes.

Hydrophobe associative polymers and compositions and methods employing them

Abstract: Water soluble associative polymers and compositions comprising them together with alkali metal salts of carboxylic acid are disclosed. Methods comprise introducing into a wellbore a fluid comprising such associative polymers and alkali metal salts of carboxylic acid, e.g., cesium formate. Disclosed water soluble associative polymers have functionality including at least sulfonate groups, carboxylate groups and hydrophobes associative with one another in a saturated aqueous solution of an alkali metal salt of a carboxylic acid. Water soluble associative polymers are formed as the polymerization reaction product of reactants comprising an AMPS reactant, an alpha, beta-unsaturated carbonyl reactant and a hydrophobe reactant selected from acrylic esters, methacrylic esters and a mixture of any of them, having a - OOR moiety wherein R is a hydrophobe which, as hydrophobe moieties of the resultant associative polymer, are associative with one another in a saturated aqueous solution of an alkali metal salt of a carboxylic acid.

Copper ion removal by almond shell carbons and commercial carbons: batch and column studies

Abstract: Phosphoric acid-activated/oxidized, and steam-activated and steam-activated/oxidized almond shell granular activated carbons (GACs) were investigated for their utility in removing copper ion (Cu2+) from solution in both batch and column applications compared to commercially available GACs. Adsorption isotherms were developed and found to best fit the Freundlich model. Experimental and commercial carbons were packed into columns and exposed to two different empty bed contact times using a solution of 3 mM CuCl2 buffered at pH 4.8. The most effective GACs for removal of copper ions in batch mode were the phosphoric acid-activated/oxidized and steam-activated/oxidized experimental carbons. The most effective carbon in column mode appeared to be the phosphoric acid-activated/oxidized sample. A column packed with this carbon showed higher breakthrough volumes and greater estimated hours of operation than other experimental carbons and commercial carbons evaluated. This carbon could function as an effective met...

Membrane electrode assemblies for use in fuel cells

Abstract: Electrocatalyst powders and methods for producing electrocatalyst powders, such as carbon composite electrocatalyst powders. The powders have a well-controlled microstructure and morphology. The method includes forming the particles from an aerosol of precursors by heating the aerosol to a relatively low temperature, such as not greater than about 400° C.

Method for the production of electrocatalyst powders

Abstract: Electrocatalyst powders and methods for producing electrocatalyst powders, such as carbon composite electrocatalyst powders. The powders have a well-controlled microstructure and morphology. The method includes forming the particles from an aerosol of precursors by heating the aerosol to a relatively low temperature, such as not greater than about 400° C.

Dispersions comprising modified pigments

Abstract: The present invention describes a dispersion comprising a vehicle and a modified pigment. The modified pigment has, when measured in an aqueous medium, a zeta potential of 0.0 mV at a pH of between 5.0 and 11.0 Inkjet ink compositions and an inkjet consumable set are also disclosed.

Methods of making a particle having an attached stable free radical

Abstract: A modified particle is disclosed wherein a particle has an attached group having the formula: wherein Ar represents an aromatic group; R 1 represents a bond, an arylene group, an alkylene group, wherein R 4 is an alkyl or alkylene group or an aryl or arylene group; R 2 and R 3 , which can be the same or different, represent hydrogen, an alkyl group, an aryl group, —OR 5 , —NHR 5 , —NR 5 R 5 , or —SR 5 , wherein R 5 , which is the same or different, represents an alkyl group or an aryl group; and SFR represents a stable free radical. Also disclosed is a modified particle or aggregate having attached a group having the formula: wherein CoupA represents a Si-containing group, a Ti-containing group, or a Zr-containing group; R 8 and R 9 , which can be the same or different, represent hydrogen, an alkyl group, an aryl group, —OR 10 , —NHR 10 , —NR 10 R 10 , or —SR 10 , wherein R 10 represents an alkyl group or an aryl group; SFR represents a stable free radical; and n is an integer of from 1 to 3. A modified particle having an attached —SFR or —X—SFR is additionally disclosed. Also, modified particles with attached polymers are also disclosed as well as methods of making the modified particles.

Tantalum and niobium billets and methods of producing the same

Abstract: Extruded tantalum billets and niobium billets are described having a substantially uniform grain size and preferably an average grain size of about 150 microns or less and more preferably an average grain size of about 100 microns or less. The extruded billet can then be forged or processed by other conventional techniques to form end use products such as sputtering targets. A process for making the extruded tantalum billets or niobium billets is also described and involves extruding a starting billet at a sufficient temperature and for a sufficient time to at least partially recrystallize the billet and form the extruded billet of the present invention.

Inkjet ink systems comprising a gelling agent

Abstract: Inkjet ink systems are disclosed which comprise a) a liquid vehicle, b) a colorant, and c) a gelling agent. The gelling agent may be incorporated either into the liquid vehicle, into a second jettable composition, or onto a substrate. The gelling agent may also be attached to the colorant. In addition, several methods of generating an image are also described which utilize compositions comprising a gelling agent.

Modified pigments and process for preparing modified pigments

Abstract: Processes for preparing modified pigments are described. In one embodiment, the process comprises the step of combining, in any order, a pigment having attached an electrophilic group and a thiol reagent comprising at least one —SH group and at least two ionic or ionizable groups. In a second embodiment, the process comprises the step of combining, in any order, a pigment having attached an electrophilic group and a thiopolymer comprising at least one —SH group. Modified pigments are also described.

Method for the deposition of an electrocatalyst layer

Abstract: Electrocatalyst powders and methods for producing electrocatalyst powders, such as carbon composite electrocatalyst powders. The powders have a well-controlled microstructure and morphology. The method includes forming the particles from an aerosol of precursors by heating the aerosol to a relatively low temperature, such as not greater than about 400° C.

Composite particles for electrocatalytic applications

Abstract: Electrocatalyst powders and methods for producing electrocatalyst powders, such as carbon composite electrocatalyst powders. The powders have a well-controlled microstructure and morphology. The method includes forming the particles from an aerosol of precursors by heating the aerosol to a relatively low temperature, such as not greater than about 400° C.

Corrosion-resistant coating composition

Abstract: The invention provides an anticorrosive surface coating composition comprising a resin system, and a hydrophobic metal oxide. The hydrophobic metal oxide is characterized by being produced via a wet process and having a surface area of at least about 350 m2/g. The invention also provides a method of producing such an anticorrosive coating composition. The invention further provides a substrate having a surface coated with the surface coating composition of the invention, as well as a method of imparting corrosion resistance to a surface of a substrate.

Method for fabricating membrane eletrode assemblies

Abstract: Electrocatalyst powders and methods for producing electrocatalyst powders, such as carbon composite electrocatalyst powders. The powders have a well-controlled microstructure and morphology. The method includes forming the particles from an aerosol of precursors by heating the aerosol to a relatively low temperature, such as not greater than about 400° C.

Ink jet recording medium comprising amine-treated silica

Abstract: This invention pertains to an ink jet recording medium comprises a flexible substrate and a coating composition coated on at least one surface of the substrate, wherein the coating composition comprises the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane. The invention also pertains to a method for the preparation of such an ink jet recording medium and to methods for the preparation of a coating composition and a dispersion useful in the preparation of such an ink jet recording medium.

Methods for the deposition of conductive electronic features

Abstract: A precursor composition for the deposition and formation of an electrical feature such as a conductive feature. The precursor composition advantageously has a low viscosity enabling deposition using direct-write tools. The precursor composition also has a low conversion temperature, enabling the deposition and conversion to an electrical feature on low temperature substrates. A particularly preferred precursor composition includes copper metal for the formation of highly conductive copper features.

Ink compositions comprising salts with polyvalent ions

Abstract: An ink composition and, in particular, an ink composition, comprising a liquid vehicle, at least one modified pigment having attached at least one functional group, at least one salt having a polyvalent ion, and at least one polymer is disclosed Methods of generating an image using this ink composition are also described

Metal-air battery components and methods for making same

Abstract: Energy devices such as batteries and methods for fabricating the energy devices. The devices are small, thin and lightweight, yet provide sufficient power for many handheld electronics.

Methods of making a niobium metal oxide

Abstract: Methods to at least partially reduce a niobium oxide are described wherein the process includes heat treating the niobium oxide in the presence of a getter material and in an atmosphere which permits the transfer of oxygen atoms form the niobium oxide to the getter material, and for a sufficient time and at a sufficient temperature to form an oxygen reduced niobium oxide. Niobium oxides and/or suboxides are also described as well as capacitors containing anodes made from the niobium oxides and suboxides.

Carbon black and compositions containing same

Abstract: Novel carbon blacks are described which have a volatile content of from about 1.5 to about 3.5 and/or a moisture content of at least 0.5 along with one or more analytical properties. Inks and coating and other compositions are further described which include the carbon blacks of the present invention. Methods of decreasing the cure energy of an ink as well as methods to improve storage stability are further described.

Method of preparing aerogel-containing insulation article

Abstract: The inventive method of preparing an insulation article comprises providing a sealed first container comprising aerogel particles under a first air pressure that is less than atmospheric pressure. The unrestrained volume of the aerogel particles at the first air pressure is less than the unrestrained volume of the aerogel particles under a second air pressure that is greater than the first air pressure. The sealed first container then is placed within a second container, and the sealed first container is breached to equalize the air pressure between the first and second containers at the second air pressure and to increase the volume of the aerogel particles, thereby forming the insulation article.

Elastomer composites, elastomer blends and methods

Abstract: Elastomer composites and elastomer blends comprising particulate fillers having selected and surface area values are disclosed as well as elastomer composites and elastomer blends having improved properties. Methods of making and using elastomer composites and elastomer blends are also disclosed.

Conductive polymer compositions and articles containing same

Abstract: Polymer compositions, which are particularly useful in automotive applications, are described. The polymer composition contain at least one polymer and at least one carbon black having an STSA (statistical thickness surface area) of from about 10 to about 200 m2/g, an I?2?No of from about 15 to about 250 mg/g, a tinting strength about 130% or less, a DBPA of from about 20 to about 450 cc/100g, a CDBP of from about 20 to about 400 cc/100g, a ratio of I2No to STSA of from about 0.4 to about 2.5, a particle size of from about 14 to about 250 nm, and a %volatiles of less than about 5.0%. Articles for automotive applications and other applications, as well as a method for electrostatically painting an article are also disclosed.

Metal-carbon composite powders

Abstract: Metal-carbon composite powders and methods for producing metal-carbon composite powders. The powders have a well-controlled microstructure and morphology and preferably have a small average particle size. The method includes forming the particles from an aerosol of powder precursors. The invention also includes novel devices and products formed from the composite powders.

Method for making composite particles including a polymer phase

Abstract: Energy devices such as batteries and methods for fabricating the energy devices The devices are small, thin and lightweight, yet provide sufficient power for many handheld electronics

Coating compositions comprising high t-area carbon products

Abstract: The present invention discloses coating compositions comprising a liquid vehicle and a carbon product having a t-area greater than or equal to 400 m2/g. In addition, the present invention discloses coating compositions comprising a liquid vehicle and a modified carbon product having a t-area greater than or equal to 350 m2/g, wherein the modified carbon product comprises a carbon product having attached at least one organic group.

Methods of making a niobium metal oxide

Abstract: Methods to at least partially reduce a niobium oxide are described In one embodiment, a milling process is described wherein the surfaces of the mill in contact with the staring metal oxide, getter material, and/or oxygen reduced metal oxide are the same as the material being milled Other milling techniques and products are also described