|| List of recent Silica-related patents
|Process for converting gaseous alkanes to liquid hydrocarbons|
Embodiments disclose a process for converting gaseous alkanes to higher molecular weight hydrocarbons, olefins or mixtures thereofs wherein a gaseous feed containing alkanes may be reacted with a dry bromine vapor to form alkyl bromides and hydrobromic acid vapor. The mixture of alkyl bromides and hydrobromic acid then may be reacted over a synthetic crystalline alumino-silicate catalyst, such as a zsm-5 or an x or y type zeolite, at a temperature of from about 250° c.
|Polyguanidine silicate and use thereof|
A polyguanidine silicate obtainable by reacting a polymeric guanidine salt provided in an aqueous solution with an aqueous solution of a sodium and/or potassium silicate.. .
|Rubber composition and pneumatic tire|
To produce a copolymer, and reacting a compound containing a nitrogen atom and/or a silicon atom with an active terminal of the copolymer, wherein the rubber composition includes the conjugated diene polymer in an amount of not less than 10% by mass per 100% by mass of a rubber component of the rubber composition, and the silica in an amount of 10-70 parts by mass per 100 parts by mass of the rubber component.. .
|Rubber composition for tire, and pneumatic tire|
Provided are a rubber composition for a tire capable of improving fuel economy, wet grip performance, abrasion resistance, and processability, and a pneumatic tire including the composition. Included is a rubber composition for a tire including: a diene polymer; silica; and a compound of formula (i) below, the diene polymer being a modified diene polymer obtained by reacting components (a) and (b), the amount of the compound of formula (i) being 0.1-10 parts by mass per 100 parts by mass of the rubber component, the component (a) being an active alkali metal-terminated conjugated diene polymer obtained by polymerizing a conjugated diene monomer alone or with an aromatic vinyl monomer, in the presence of a component (c), the component (b) being a modifying agent containing a functional group, and the component (c) being a chemical species obtained by reacting an organic alkali metal compound with a compound of formula (1) below..
|Rubber composition for tire cord coating, breaker edge strip, breaker cushion or cord-adjoining strip, and pneumatic tire|
Provided are a rubber composition for a tire cord topping, a breaker edge strip, a breaker cushion, or a strip adjacent to cords, which achieves a balanced improvement in handling stability, fuel economy, durability, ride quality, and adhesion; and pneumatic tires including the same. The rubber composition includes: an isoprene-based rubber; a phenol resin and/or an alkylphenol resin; and a partial condensate of hmmm and/or a partial condensate of hmmpme, wherein an amount of the isoprene-based rubber is 60% by mass or higher per 100% by mass of the rubber component; and a combined amount of the phenol resin and the alkylphenol resin is 2-3.9 parts by mass, a combined amount of the partial condensate of hmmm and the partial condensate of hmmpme is 0.5-5 parts by mass, and an amount of silica is at most 15 parts by mass, each per 100 parts by mass of the rubber component..
|Functionalized silica with elastomer binder|
A functionalized silica product includes particles of a hydrophobated silica having a thin coating of an emulsion polymer. A ratio of the hydrophobated silica to the emulsion polymer is from about 4/1 to about 50/1.
|Vehicle tyre, the tread of which comprises a heat-expandable rubber composition|
A vehicle tyre includes a tread formed of a rubber composition that is heat-expandable when unvulcanized, and expanded when vulcanized. When unvulcanized, the composition includes from 50 to 100 phr of a copolymer based on styrene and butadiene; optionally from 0 to 50 phr of another diene elastomer, such as a polybutadiene or a natural rubber; more than 50 phr of a reinforcing filler, such as silica and/or carbon black; between 5 and 25 phr of a sodium- or potassium-including carbonate or hydrogencarbonate; and between 2 and 15 phr of a carboxylic acid having a melting point between 60° c.
|Tire with rubber tread containing precipitated silica and functionalized carbon nanotubes|
This invention relates to a tire having a rubber tread containing functionalized carbon nanotubes and particulate reinforcement comprised of precipitated silica.. .
|Dental resin modified glass-ionomer composition|
The dental resin modified glass-ionomer composition includes an acidic polymer; an acidic polymerizable monomer selected from 4-(meth)acryloxyalkyltrimellitic anhydride, 4-(meth)acryloxyalkyltrimellitic acid, and a combination thereof; a non-acidic polymerizable monomer; a fluoroaluminosilicate glass filler; water; and at least one polymerization initiator system. The dental resin modified glass-ionomer composition is useful for a dental restorative composition, an endodontic composition, and/or an orthodontic composition, and provides significantly enhanced adhesive property toward tooth structure..
|Curing-type coating-agent composition|
A curing-type coating-agent composition according to the present invention contains: component (a) (e.g., an isocyanuric ring-containing urethane (meth)acrylate compound) in an amount of from 20 to 80 parts by mass; component (b) (e.g., an isocyanuricring-containing tri(meth)acrylate compound free from any urethane bond) in an amount of from 10 to 70 parts by mass; component (c-1) (e.g., a reaction compound between a colloidal silica and an alkoxysilane compound having a maleimide group) in amount of from 1 to 35 parts by mass, or component (c-2) (e.g., a specific organosilicon compound) in an amount of from 5 to 35 parts by mass; a radical-polymerization initiator serving as component (d) in an amount of from 0.1 to 10 parts by mass; an ultraviolet absorber serving as component (e) in an amount of from 1 to 12 parts by mass; and an organic solvent serving as component (f) in an amount of from 10 to 1,000 parts by mass; with respect to a sum of the component (a), the component (b), and the component (c-1) or the component (c-2) being taken as 100 parts by mass. The aforementioned composition demonstrates excellent wear resistance and weatherability as a coating agent for plastic substrate, or the like, which is employed outside..
|Tyre, the tread of which comprises a heat-expandable rubber composition reducing noise during travel|
A vehicle tyre includes a tread formed of a heat-expandable rubber composition when in an unvulcanized state. The composition includes: from 50 to 100 phr of a copolymer based on styrene and butadiene; optionally from 0 to 50 phr of another diene elastomer, such as a polybutadiene or natural rubber; more than 50 phr of a reinforcing filler, such as silica and/or carbon black; between 5 and 25 phr of a blowing agent, such as an azodicarbonamide compound; and between 5 and 25 phr of a heat-fusible compound having a melting point between 70° c.
|Grease-like gel for repelling rodents|
Grease-like compositions are provided for repelling rodents. The compositions utilize nontoxic mineral, synthetic, or vegetable oil based gels containing silica, clay, urea, polytetrafluoroethylene, or metallic soap thickeners and capsaicin..
|Method for cleaning outdoor surfaces|
A method for cleaning an outdoor surface includes combining a first composition from a first vessel with a second composition from a second vessel. The first composition includes hydrogen peroxide and makes up 94-99.5% of the combination by weight.
|Encoded polymeric microparticles|
Provided are encoded polymeric microparticles and a multiplexed bioassay using the encoded polymeric microparticles. Each of the encoded polymeric microparticles includes an encoded polymeric microparticle core and a silica shell surrounding the microparticle core.
|Lithium silicate glass ceramic and lithium silicate glass comprising a divalent metal oxide|
Lithium silicate glass ceramics and glasses containing specific oxides of divalent elements are described which crystallize at low temperatures and are suitable in particular as dental materials.. .
|Foam composition for building purposes|
A foam composition for building purposes, particularly for filling joints or connecting construction parts, contains a foamable aqueous phase and a propellant which foam when sprayed together through a nozzle. The foamable aqueous phase contains at least one organic polymer and inorganic components, which include a silicate chemically dissolved in the aqueous phase, the solution of which is film-forming.
In the case of a packaging laminate with good oxygen and aroma barrier properties comprising paper and a film of plastic metallized on one side, the paper is connected to the side of the film of plastic that has the metallization by way of a layer of laminating agent containing at least a water-based silicate.. .
|Method of enhancing palatability of a dietary supplement to animal food|
Fish oil is thickened using a thickening agent, such as one or both of silica and wax dispersed in the fish oil to thereby facilitate ease of delivery of the fish oil to an animal. The fish oil and the thickening agent form a viscous liquid blend that functions as a delivery medium of nutrients naturally present in the fish oil.
|Particles formed of silica and carbon, and method for producing mixture of silica and carbon|
A particle formed of silica and carbon having a low impurity content and an excellent reactivity is provided. Also provided is a method of producing a silica and carbon-containing material including: (b) a carbon mixing step of mixing an aqueous alkali silicate solution having a silicon concentration within the liquid portion of at least 10 wt % with carbon so as to obtain a carbon-containing aqueous alkali silicate solution; and (c) a silica recovery step of mixing the carbon-containing aqueous alkali silicate solution with a mineral acid so as to cause carbon and silicon within the liquid portion to precipitate as particles formed of silica and carbon and thus obtaining a particle-containing liquid substance, then solid-liquid separating the liquid substance so as to obtain a solid portion of a silica and carbon-containing material which is an assembly of particles formed of silica and carbon and a liquid portion containing impurities..
|Preparation of lithium carbonate from lithium chloride containing brines|
This invention relates to a method for the preparation of lithium carbonate from lithium chloride containing brines. The method can include a silica removal step, capturing lithium chloride, recovering lithium chloride, supplying lithium chloride to an electrochemical cell and producing lithium hydroxide, contacting the lithium hydroxide with carbon dioxide to produce lithium carbonate..
|Wiring board and light emitting device|
There is provided a wiring board. The wiring board includes: a first insulating layer; a plurality of wiring patterns on the first insulating layer so as to be spaced apart from each other; a plating layer on at least one of the wiring patterns; a second insulating layer containing silicone therein and having an opening, wherein an outermost surface of the plating layer is exposed from the opening and serves as a connection pad; and a silica film on the outermost surface of the plating layer..
Either or both the upper and lower sides of the piston ring are covered with a resin-based film containing a fibrous filler with a mean fiber diameter of 50 to 500 nm and an aspect ratio of 30 to 500. The fibrous filler content is 0.5 to 10 vol % with respect to the total resin-based film.
|Lithium silicate glass ceramic and lithium silicate glass comprising a trivalent metal oxide|
Lithium silicate glass ceramics and glasses containing specific oxides of trivalent elements are described which crystallize at low temperatures and are suitable in particular as dental materials.. .
|Container pad and heat-insulating sleeve|
A container pad and protective sleeve made integrally of silica gel is provided with a plurality of members and connecting portions respectively disposed between two of the members. The members can freely be adjusted and changed in shape to serve as a container pad or as a container protective sleeve to be tightly covered around the outer wall of a container after the members are adjusted into a solid state..
|Preparation of pre-coated rp-rotors and universal chromatorotors, chromatographic separation devices and methods for centrifugal preparative chromatography|
Reversed phase solid silica gel sorbent layers which can adhere with appropriate binders to a solid surface were developed. Pre-coated rp-rotors of different thickness were used these pre-coated rp-rotors can be used for centrifugal preparative thin-layer chromatography (cptlc) using any appropriate device for centrifugal chromatography, like chromatotron® or cyclograph.
|Colloidal silica addition to promote the separation of oil from water|
The combination of colloidal silica in conjunction with a chemical, such as a cationically-modified water soluble polymer, e.g. Aluminum brine dispersion polymer, clarifies combinations of oil and water, for instance wastewater comprising an oil-in-water emulsion.
|Solid chemical well treatment|
A solid chemical delivery system for delivering solid well treatment chemicals to an underground formation. The solid chemical is formed by dehydrating a silicate to form anhydrous silicate.
|Water-ingress label using a double coating capsule structure|
A water-ingress label using a double coating capsule structure includes a water absorbent layer which is formed from any one of paper, synthetic paper, non-woven fabric, synthetic non-woven fabric, korean paper or an absorbent coating for absorbing water; an ink layer which is formed on the back surface of the water absorbent layer as an ink having a double coating capsule structure including a colourant selected from any one or a plurality of water-soluble dyes, pigments, metallic silica, metallic oxides and mica together with a hydrophilic/water-absorbing halogen-free resin; and an ink barrier layer having a damp-proofing and water-proofing function, which is formed on the back surface of the ink layer and prevents leaking, into the back surface of the ink layer, of the colourant selected from any one or more of water-soluble dyes, pigments, metallic silica, metallic oxides and mica.. .
|Wear resistant dental composition|
The present invention relates to a solid composition comprising: a calcium silicate powder, a set accelerator in the form of a powder, a reinforcing filler in a solid form, a radio-opacifying agent in a solid form, at least one complementary ingredient selected from solid fibers or solid porous fillers, optionally a water-reducing agent in a solid form, and optionally solid pigments. The present invention also relates to a kit of parts for the preparation of a composition suitable for use in dentistry comprising in a first container a solid phase including the solid composition according to the invention, and in a second container an aqueous phase.
|Lithium silicate glass ceramic and lithium silicate glass comprising a tetravalent metal oxide|
Lithium silicate glass ceramics and glasses containing specific oxides of tetravalent elements are described which crystallize at low temperatures and are suitable in particular as dental materials.. .
|Molecular sieve adsorbent blends and uses thereof|
A process for the production of a molecular sieve blend with improved performance characteristics produced by preparing or obtaining a hydrophilic zeolite, particularly a hydrophilic zeolite a with a low sio2:al2o3 ratio, preparing or obtaining a hydrophobic silicon based binder, particularly a hydrophobic colloidal silica or a hydrophobic siloxane based material, mixing the zeolite with the silicon based binder and, in one embodiment, a seed containing small quantities of a clay binding agent and the zeolite, to form a mixture, and forming the mixture into the molecular sieve blend.. .
|Alkyd resin based paint work composition and a method for preparing the same|
The invention provides an alkyd resin based paint work composition comprising an alkyd resin based film forming material, one or more colorants, one or more fast-drying materials, fumed silica, one or more types of carbon nanotubes and one or more solvents. The invention also provides a method for preparing the alkyd resin based paint work composition..
|Rubber composition for studless winter tires, and studless winter tire|
[amount of silica (1)]×0.2≦[amount of silica (2)]≦[amount of silica (1)]×6.5.. .
An object of the present invention is to provide an oil-in-water emulsion defoaming agent that is superior in defoaming properties (initial defoaming property and defoaming durability) and stability (emulsion stability). The present invention provides an oil-in-water emulsion defoaming agent including hydrophilic fumed silica (c), wherein an oil phase (a) is emulsified and dispersed in a water phase (b).
|Hydraulic cements, methods and products|
Non-aqueous hydraulic cement compositions comprise a non-aqueous mixture of a powder composition and a non-aqueous water-miscible liquid. In one embodiment, powder composition is a brushite or monetite-forming calcium phosphate powder composition.
|Well treatment fluids and methods utilizing nano-particles|
Disclosed embodiments relate to well treatment fluids and methods that utilize nano-particles. Exemplary nano-particles are selected from the group consisting of particulate nano-silica, nano-alumina, nano-zinc oxide, nano-boron, nano-iron oxide, and combinations thereof.
|Stable oxide encapsulated metal clusters and nanoparticles|
The present invention discloses stable, non-agglomerated, ultra-small metal/alloy clusters encapsulated in silica with the metal/alloy cluster size of less than 5 nm. The invention further discloses a simple, cost effective process for the preparation of metal/alloy clusters encapsulated in silica which is thermally stable and without agglomeration..
|Vertically aligned mesoporous thin film, method of manufacturing the same, and catalytic application thereof|
This invention relates to a vertically aligned mesoporous silicate film with site-selective metal deposition from a single polymeric precursor and to diverse catalytic applications thereof. There is an innovative approach of a single precursor to manufacture a vertically aligned mesoporous silicate thin film having high thermal and chemical resistance on a large-area silicon wafer (2 cm×3 cm).
|Disk roll and base material thereof|
A base material for a disk roll including ceramic fibers, an inorganic binder and scaly silica.. .
|Concrete cutting, polishing and coloring treatment solutions and methods|
Systems and methods for treating concrete, which includes the steps of wetting a surface of concrete with a amorphous colloidal silica, allowing time for the colloidal silica to penetrate the concrete surface, and cutting the surface of the concrete with a bladed tool wherein the longitudinal blade portion is positioned approximately at an angle between 30 degrees and 90 degrees relative to the surface of the concrete.. .
|Surface selective polishing compositions|
The disclosure provides polishing compositions that show a high polishing rate ratio of a silicon nitride (sin) surface to a silicon oxide surface, and/or of a sin surface to a polycrystalline silicon (poly si) surface. Such compositions comprise, in certain aspects, of colloidal silica, and one or more water soluble polymers, and has a ph of 6 or less, wherein the colloidal silica comprises one or more organic acids bound to its surface, and the water soluble polymer is a polyoxyalkylene hydrocarbyl ether which hydrocarbyl moiety has 12 or more carbon atoms..
|Toner, developer and image forming apparatus|
To provide a toner, which contains silica particles containing first silica particles, and second silica particles, wherein the toner is a toner produced by depositing the silica particles on surfaces of base particles, the first silica particles have an average primary particle diameter of 75 nm to 250 nm, the second silica particles have an average primary particle diameter of 10 nm to 50 nm, a mass ratio of the first silica particles to the base particles is 0.010 to 0.040, a mass ratio of the second silica particles to the base particles is 0.005 to 0.030, a liberation ratio of the silica particles from the toner by a ultrasonic vibration method is 5% by mass to 20% by mass, and an amount of particles having primary particle diameters of 30 nm or smaller in the silica particles librated from the toner by the ultrasonic vibration method is 20% by number or less.. .
|Dielectric ceramic composition, electronic element, and composite electric element|
In order to provide a dielectric ceramic composition capable of sintering at a low temperature, implementing a low relative dielectric constant, providing other excellent properties (such as a relative density and an insulation resistance), performing co-firing of different materials, and suppressing dispersion of ag in the sintered body when the internal electrode is formed, the dielectric ceramic composition includes a main ingredient containing sio2—k2o—b2o3-based glass of 40 to 65 weight %, quartz of 35 to 50 weight %, and amorphous silica of remaining weight %; and a subsidiary ingredient containing alumina of 1.5 to 4 weight %, k2o-mo—sio2—b2o3-based glass (where “mo” denotes at least any one selected from a group consisting of cao and sro) of 5 to 20 weight % relative to the main ingredient of 100 weight %.. .
|Copper paste composition and its use in a method for forming copper conductors on substrates|
This invention relates to a copper thick film paste composition paste comprising copper powder, a pb-free, bi-free and cd-free borosilicate glass frit, a component selected from the group consisting of ruthenium-based powder, copper oxide powder and mixtures thereof and an organic vehicle. The invention also provides methods of using the copper thick film paste composition to make a copper conductor on a substrate.
|Copper cha zeolite catalysts|
Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the cha crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures.
|Uniform illumination light diffusing fiber|
Light diffusing optical fibers for use in ultraviolet illumination applications and which have a uniform intensity that is angularly independent are disclosed herein along with methods for making such fibers. The light diffusing fibers are composed of a silica-based glass core that is coated with a number of layers including a scattering layer.
|Light source comprising a luminescent substance and associated illumination unit|
A light source includes a primary radiation source, which emits radiation in the shortwave range of the optical spectral range, wherein this radiation is converted at least by means of a first luminescent substance entirely or partially into secondary longer-wave radiation in the visible spectral range, wherein the first luminescent substance originates from the class of nitridic modified orthosilicates (nos), wherein the luminescent substance has as a component m predominantly the group ea=sr, ba, ca, or mg alone or in combination, wherein the activating dopant d is composed at least of eu and replaces a proportion of m, and wherein a proportion of sio2 is introduced in deficiency, so that a modified sub-stoichiometric orthosilicate is provided, wherein the orthosilicate is an orthosilicate stabilized with re and n, where re=rare earth metal.. .
|Coated phosphors and light emitting devices including the same|
Provided according to embodiments of the invention are method of coating a phosphor that include contacting the phosphor with a sol comprising at least one of silica, alumina, borate and a precursor thereof, to form a coating on the phosphor; and heating the phosphor. Also provided are phosphors that are coated with alumina, silica and/or borate, and light emitting devices that include such phosphors..
|Molecular sieve adsorbent blends and uses thereof|
A molecular sieve blend with improved performance characteristics produced by preparing or obtaining a hydrophilic zeolite, particularly a hydrophilic zeolite a with a low sio2:al2o3 ratio, preparing or obtaining a hydrophobic silicon based binder, particularly a hydrophobic colloidal silica or a hydrophobic siloxane based material, mixing the zeolite with the silicon based binder and, in one embodiment, a seed containing small quantities of a clay binding agent and the zeolite, to form a mixture, and forming the mixture into the molecular sieve blend.. .
|Process for concentrating manganese ores via reverse cationic flotation of silicates|
A process for concentrating manganese from the tailing of a manganese-carrying mineral including removing a coarse particle size fraction from the tailing, desliming and conducting an acidic or a basic reverse cationic flotation. The manganese-carrying minerals are typically minerals with low manganese content from the lithologies “tabular pelite” (or petb), pelite siltite (or pest), detritic (or detr), rich pelite (or perc) and metallurgical bioxide (or bxme).
|Polymer solar cell and method of forming the same|
Provided is a polymer solar cell. The polymer solar cell includes a photoactive layer having a network-structured electron donor layer and a silica thin film layer surrounding the electron donor layer.
|Method for preparing poly(hydroxymethyl)-functional siloxanes and silica gels|
Hydroxymethyl-functional siloxanes and silica gels are prepared by reacting a siloxacycle having at least one unit of the formula [sir2(or3)—ch2—o]n with water, optionally in the presence of a hydrolyzable silane.. .
|Particulate metallocene-alumoxane catalyst|
The invention relates to a process for the preparation of a particulate polyethylene product in a loop reactor, wherein the polymerization catalyst applied in the polymerization process comprises a particulate metallocene-alumoxane catalyst immobilized on a porous silica support; and whereby said metallocene-alumoxane catalyst is heterogeneously distributed on said porous silica support.. .
|Rubber composition and pneumatic tire|
To produce a copolymer, and reacting a compound containing nitrogen and/or silicon atoms with an active terminal of the copolymer, wherein the rubber composition contains the conjugated diene polymer in an amount of 5-45% by mass per 100% by mass of a rubber component, the silica in an amount of 5 to 100 parts by mass per 100 parts by mass of the rubber component, and the coupling agent in an amount of 2-12 parts by mass per 100 parts by mass of the silica.. .
|Tire rubber composition and pneumatic tire|
Provided are: a tire rubber composition improving fuel economy and abrasion resistance while maintaining good wet-grip performance or improving it; and a pneumatic tire including the same. The composition contains: a rubber component including a diene polymer (1); silica; and a diene polymer (2), the polymers (1) and (2) being modified diene polymers obtained by reacting components (a)-(b), the polymer (1) having a mn of 110000-1500000, the polymer (2) having a mn of 1000-100000, the amount of polymer (2) being 2-25 parts by mass per 100 parts by mass of the rubber component, wherein (a): an active alkali metal-terminated conjugated diene polymer obtained by polymerizing a conjugated diene monomer alone or with an aromatic vinyl monomer, in the presence of a component (c); (b): a modifying agent containing a functional group; (c): a chemical species obtained by reacting an organic alkali metal compound with a compound of formula (1):.
|Rubber composition for tire treads|
A rubber composition for tire treads is obtained by blending, per 100 parts by mass of a diene rubber, 5 to 150 parts by mass of silica and 0.5 to 20 parts by mass of a silicone oligomer represented by the following siloxane average formula (1): (x)a(y)b(r1)c(r2)dsio(4-a-b-c-d)/2 (wherein x is a mercapto group-containing organic group; y is a hydrolyzable group, r1 is a monovalent hydrocarbon group having from 4 to 10 carbon atoms, r2 is a monovalent hydrocarbon group having from 1 to 3 carbon atoms, 0<a<1, 0<b<3, 0<c<2, 0≦d<2, and 0<a+b+c+d<4). The diene rubber contains an aromatic vinyl-conjugated diene copolymer in an amount of at least 50 parts by mass per 100 parts by mass of the diene rubber, the aromatic vinyl-conjugated diene copolymer having an aromatic vinyl content of 20 to 45 mass % and a vinyl bond content in the conjugated diene of 10 to 50%..
|Rubber composition for tire, and pneumatic tire|
The present invention provides a rubber composition for a tire having improved abrasion resistance, fuel economy and processability in a balanced manner. The present invention also provides a method for producing the rubber composition, and a pneumatic tire formed from the rubber composition.
|Rubber composition and studless tire|
Provided are a rubber composition capable of achieving a balanced improvement in performance on ice and snow, fuel economy, abrasion resistance, rubber strength, wet-grip performance, and dry handling stability, and a studless winter tire including the rubber composition. The present invention relates to a rubber composition including a specific conjugated diene polymer obtained by using a polymerization initiator represented by the formula (i) below, a high-cis polybutadiene having a cis microstructure content of not less than 95% by mass, a polyisoprene-based rubber, and a silica having a n2sa of 40-400 m2/g, wherein the rubber composition includes, based on 100% by mass of a rubber component, 1-45% by mass of the conjugated diene polymer, 20-64% by mass of the high-cis polybutadiene, and 35-60% by mass of the polyisoprene-based rubber, and the rubber composition includes 5-150 parts by mass of the silica for each 100 parts by mass of the rubber component..
|Silicate prodrugs and nanoparticles|
The invention provides silicate prodrugs comprising a therapeutic agent linked to one or more groups of formula (i): —si(or)3 (i); wherein each r independently has any of the values defined herein, as well as nanoparticles comprising such compounds.. .
|High activity olefin polymerization catalyst comprising boron-containing silica support and the preparation thereof|
The present invention relates to a high activity olefin polymerization catalyst comprising a boron-containing silica support and the preparation thereof. This invention is characterized in that the support is heat treated in combination with a chemical treatment using a boron compound.
|Method for suppressing increase in so2 oxidation rate of nox removal catalyst|
In a nox removal catalyst used for removing nitrogen oxides in flue gas, when a silica (si) component as an inhibitor that causes an increase in a so2 oxidation rate accumulates on a surface of the catalyst, the silica component accumulating on the surface of the catalyst is dissolved, thereby regenerating the catalyst. Accordingly, the inhibitor such as the silica component covering the surface of the nox removal catalyst can be removed, thereby enabling to provide a catalyst without having an increase in the so2 oxidation rate of the regenerated nox removal catalyst..
|Seal compositions, methods, and structures for planar solid oxide fuel cells|
A seal composition includes a first alkaline earth metal oxide, a second alkaline earth metal oxide which is different from the first alkaline earth metal oxide, aluminum oxide, and silica in an amount such that molar percent of silica in the composition is at least five molar percent greater than two times a combined molar percent of the first alkaline earth metal oxide and the second alkaline earth metal oxide. The composition is substantially free of boron oxide and phosphorus oxide.