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4224295 |
Process for the production of finely divided silicic acid by spray drying
A finely divided silicic acid having a pH>6 is prepared by spray drying, in the presence of a base or basic-reacting substance, a highly concentrated silicic acid suspension having excess,...
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4179431 |
Precipitated silicic acid granules
Free flowing, finely divided precipitated silicic acid granules of reduced dust content and reduced abrasion are obtained by a process including the step of subjecting a silicic acid suspension to...
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4155769 |
Non-settling coating composition and flatting pigment
A coating composition such as nitrocellulose lacquer or varnish incorporates a flatting pigment having non-settling properties obtained by grinding a dried precipitated hydrated silica and...
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4147760 |
Thickening agent for liquid media consisting of highly dispersed silicon dioxide and process for making the same
A process for the manufacture of highly dispersed silicon dioxide with improved thickening action by treatment of pyrogenically produced silicic acid comprising the following steps: A. preparing...
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4137092 |
Dispersion or suspension of solid phase in liquid phase
The inventive method uses a continuous mixer for making dispersions or suspensions of a solid phase in a liquid phase. The solid and liquid phases are fed continuously into the mixer at respective...
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4127641 |
Process for the preparation of precipitated silicas having morphology similar to pyrogenic silicas
A multistage precipitation and flocculation production process is disclosed in which primary silica particles are prepared and flocculated useing an alkali metal salt solution and further silica...
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4054689 |
Method of preparing hydrophobic silica
Amorphous silica is rendered hydrophobic by treating the silica with hydrogen fluoride vapors. The hydrophobic silica thus produced is useful in applications wherein either the sorbed fluoride...
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4040858 |
Preparation of precipitated silicas having controlled refractive index
A method for producing precipitated silicas and silicates having a unique combination of physical and chemical properties is disclosed wherein the silicas are produced by acidulating alkali metal...
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4029513 |
Surface treated silica
Microfine silicas that are useful as rubber reinforcing fillers and thickening agents, and are readily dispersible are prepared by modifying the surface layer of the silica. The surface...
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4029514 |
Method of precipitating microfine silica using phosphate
The addition of sodium phosphate to a dilute solution of alkali metal silicate, precipitates microfine silica that is readily dispersible.
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4015996 |
Amorphous precipitated siliceous pigments
A new precipitated silica having a unique combination of physical and chemical properties is disclosed. The silicon dioxide is produced by acidulating a solution of an alkali metal silicate having...
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3977892 |
Agglomeration of finely divided particles
Strong aggregates of high density are produced from fine particles by heating said particles, then combining a binder solution comprising a saturated, dendritic crystal-forming aqueous sodium...
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3899346 |
Opacity modified pigmentary compositions
White and other colored pigmentary compositions are produced by mixing a major portion of a comminuted anhydrous mineral possessing a relatively low refractive index with a minor portion of one or...
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3892577 |
White pigment excelling in resistance to flame and corrosion
A white pigment excelling in flame resistance as well as corrosion resistance, such white pigment consisting of a phosphate having the composition of the formula M 1 O 2 .xy.(0.1.about.1.5 +...
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3888688 |
Inorganic pigments and process for their production
Inorganic pigments are prepared containing a cadmium, zinc, mercury and/or manganese colored sulfides, sulfoselenide or selenide inclosed in crystalline silicon dioxide as discrete particles. The...
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3884835 |
Crystalline silica compositions
New crystalline silicas are synthesized from a sodium silicate or other silica source solution having a Na 2 O/SiO 2 ratio of about 0.3 up to 7. These new silicas are formed at elevated...
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3867156 |
Process for manufacturing granular foamed products of silica
A process for manufacturing foamed product of silica which comprises adding a water-insoluble inorganic powder having a particle size of 0.05 to 100 μ to a silica sol to produce a uniform mixture,...
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3855394 |
SILICA PIGMENTS AND PREPARATION THEREOF
Silica pigments are precipitated by the acidulation of aqueous sodium silicate solution with carbon dioxide, and for controlling the characteristics of the silica pigment obtained, as evidenced by...
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3853574 |
PROCESSING MODIFIED PIGMENTARY COMPOSITIONS
Anhydrous silicate minerals are employed in combination with hydrous silicate minerals to produce pigmentary compositions by admixture of said minerals in a pulverized form with an inorganic binder...
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3852087 |
COMPOSITE PIGMENT FOR BLOCKING TANNIN
A new method of treatment of pigments and water-thinnable paints to enhance their ability to render tannins insoluble is described. By this means, greater protection is provided against the...
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3849180 |
PROCESS FOR BONDING PARTICULATE SOLID MATERIALS TO A SUBSTRATE
A process for bonding particulate solid active substances, such as adsorbents, catalysts or similar solids, to subdivided substrates, e.g. silica, aluminas silicate, coke breeze aluminate or...
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3840382 |
SILICA PIGMENT AND ELASTOMER-SILICA PIGMENT MASTERBATCHES AND PRODUCTION PROCESSES RELATING THERETO
As indicated at (A) through (D-6) of the drawings, the invention first produces an aqueously wet silica pigment composition (D-1) which in the embodiments is treated with oleophilic material (B)...
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3816154 |
SILICA GEL FLATTING AGENT
A very effective flatting agent for varnishes and lacquers is a silica gel which has been melt-coated with a miscible mixture of a wax and an organic fatty acid. The wax and the fatty acid should...
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3811905 |
AGGREGATE FOR ROAD CONSTRUCTION AND METHOD FOR THE PRODUCTION OF SAID AGGREGATE
An aggregate material for road construction comprising sharp-edged hard particles bonded to the surface of the particles of a basic aggregate by a binder.
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3765919 |
SYNTHETIC LIGHT-WEIGHT MATERIAL AND PROCESS AND SYSTEM FOR MANUFACTURING SAME
Synthetic light-weight material suitable for use in building, construction, building products, packaging, insulation, soil conditioning, and the like, formed of four ingredients in selective...
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3663283 |
PROCESS AND APPARATUS FOR THE PRODUCTION OF FINELY-DIVIDED METAL OXIDES
There is provided an improved process and apparatus for the production of finely-divided metal and metalloid oxides. The invention is generally characterized by the injection of a vaporized metal...
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3653851 |
HIGH-STRENGTH METAL-SILICON CARBIDE ARTICLE
Fibrous silicon carbide, substantially free of silicon dioxide, in the form of fibrous beta crystals in intimate admixture with minor amounts of particles of silicon dioxide is disclosed as a...
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3650783 |
TRIVALENT METAL PHOSPHATE COATED COLLOIDAL SILICA MOLDING POWDERS
Compositions having small particle sizes and containing (1) silica and (2) a trivalent metal phosphate and wherein the trivalent metal phosphate is distributed uniformly and homogeneously with...
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3639260 |
METHOD OF PREPARING ANTIFOAMING AGENT
The activity of hydrophobic silica antifoamers in an oil dispersion is greatly enhanced by the presence of a polyfluorosilicate.
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3503707 |
SILICA PIGMENTS AND PREPARATION THEREOF
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3499778 |
DIATOMACEOUS SILICA PIGMENTS AND THE LIKE
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3486913 |
PROCESS FOR THE PRODUCTION OF FINELY DIVIDED OXIDES FROM HALIDES
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3449072 |
SYNTHESIS OF FINELY DIVIDED OXIDE POWDERS
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3437501 |
PROCESS FOR THE MANUFACTURE OF WHITE QUARTZ POWDER
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3431231 |
SILICA AND SILICA-CONTAINING VULCANIZATES
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3400002 |
Providing low viscosities for aged siliceous slurries
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3386944 |
Water binding agents for polyurethanes based on mixtures of phosphorous pentoxide with pigments or fillers
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3372046 |
Silica pigments and process for producing same
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3364066 |
Black pigment for the blackening of infrared radiation detectors
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3322498 |
Production of silica lamellae
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3321326 |
Tetragonal silicon and germanium disulfides and their preparation
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3306760 |
Process for carrying out gas phase reactions
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3293206 |
Stabilized polyethylene compositions having anti-block characteristics
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3269799 |
Treatment of pigmentary silica
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3262801 |
Process of preparing finely divided silicas of varied properties
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3258311 |
Process for forming spherical silica beads
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3244480 |
Synthesis of fibrous silicon nitride
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3232706 |
Method of making submicron size nitrides and carbides
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3208823 |
Finely divided silica product and its method of preparation
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3202525 |
Addition of sea water during precipitation of silica pigment
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