Abstract: A high power supply device for a vacuum coating system with at least one magnetron disposed in a coating chamber comprises a line adapter for a DC power supply for converting a line voltage into a DC voltage, a line connection for supplying the line voltage, and a medium-frequency generator supplied by the DC power supply for providing a medium-frequency voltage with at least one load connection for supplying the magnetron with the medium-frequency voltage. The line adapter for the DC power supply in the medium-frequency generator are disposed in a common housing. Dimensions in the housing are adapted to dimensions of the coating chamber and the high frequency supply device is adapted to be mechanically and electrically connected to a magnetron by a connection which is direct and can be undone.

Abstract: Sealing and/or stabilizing and/or binding preparations comprising modified alkali metal silicate solutions having a molar ratio of SiO.sub.2 to Me.sub.2 O of from 2 to 4.5 wherein Me represents sodium or potassium; sodium metaborate and/or potassium metaborate in a molar ratio of SiO.sub.2 to B.sub.2 O.sub.3 of from 5 to 400; and glyoxal, and to the use of these preparations.

Abstract: A time-delayed hardener composition for aqueous alkali metal silicate solutions, the total formulation, and its application for soil stabilization, in which the hardener composition consists essentially 20 to 60% by weight of dimethyl carbonate and the balance to 100% by weight of diethyl carbonate.

Abstract: Aqueous alkali metal silicate bonding compositions having a molar ratio of SiO.sub.2 :Me.sub.2 O of 2.4:1 to 3.4:1, wherein Me is sodium and/or potassium, a solids content of about 35 to 50 percent by weight, and containing triethanolamine. The bonding compositions can be mixed with fillers such as quartz sand and used for the manufacture of molded forms for the casting of metals.

Abstract: A process for producing in situ foams based on alkali metal silicates characterized in that an aqueous alkali metal silicate solution on the one hand and a hardener solution on the other hand are accomodated in separate pressurized containers A and B, prior to use the hardener solution in container B is added to and mixed with the silicate solution in container A in the presence of a suitable emulsifier for foam formation and a propellent gas liquid under high pressure between 0.degree. and 50.degree. C., and, on actuation of the discharge valve of container A, an alkali metal silicate foam is discharged. The alkali metal silicate foams formed are distinguished by non-inflammability, high temperature stability and good heat-insulating properties and are used as a filling, construction and insulating material or the like in the building industry.

Abstract: A method for the production of a more water-resistant foamed element from waterglass consisting essentially of the steps of mixing together a major amount of an alkali metal silicate solution, with inorganic fillers, at least one alkali-resistant wetting agent in an amount sufficient to form a stable foam, at least one compound capable of hardening a waterglass foam in an amount sufficient to cause said alkali metal silicate to harden, and sufficient natural latex dispersion to cause the foamed element to have a greater water resistance, mechanically foaming said mixture by the incorporation of an inert gas thereon, filling the resultant foam into an element form capable of disassembly, curing said foam in said form, and recovering a more water-resistant foamed and cured element. Preferably the natural latex dispersion is employed in a 50% dispersion in an amount of from 0.2% to 30% by weight, preferably from 0.2% to 10% by weight, based on the total mixture.

Abstract: An adhesive composition based upon an aqueous solution of alkali metal silicate with a content of powdered inorganic filler, having good storage stability, which comprises an aqueous alkali metal silicate solution containing:(a) from 10% to 40% by weight of at least one powdered inorganic filler,(b) a suspension effective amount of at least one zinc soap of a fatty acid having from 12 to 22 carbon atoms and(c) from 0 to about 24% by weight of a 50% by weight stable, aqueous dispersion of an alkali-resistant organic polymer, based on the weight of the total composition.Preferably zinc stearate in amounts of from 1% to 5% by weight are added to the adhesives containing powdered inorganic fillers and optionally organic additives on a base of aqueous water glass solutions, to prevent separation phenomena. Sodium and/or potassium silicate solutions can be used, the sodium silicate solution being preferably present in the ratio by weight of 3.3 to 3.9:1 for SiO.sub.2 /Na.sub.

Abstract: This invention relates to an adhesive composition based upon an aqueous solution of alkali metal silicate with a content of powdered inorganic filler and optionally organic polymer, which comprises an aqueous alkali metal silicate solution containing:(a) from about 25 to 50 percent by weight of dispersed crystalline calcium carbonate;(b) from about 2 to 10 percent by weight of quartz powder with a particle size of up to about 15 .mu.m and a specific surface area of at least about 3.5 m.sup.2 /gm; and(c) from 0 to about 24 percent by weight of a 50 percent by weight stable, aqueous dispersion of an alkali-resistant organic polymer based upon acrylate, styrene/acrylate, styrene/butadiene, or a mixture thereofbased on the weight of the total composition.

Abstract: This invention is directed to binder compositions based upon aqueous solutions of alkali metal silicates. More particularly, this invention is directed to binder compositions consisting essentially of (a) aqueous alkali metal silicate solutions having a molar ratio of SiO.sub.2 :Me.sub.2 O of from about 2.0:1 to 3.4:1, with Me signifying an alkali metal, and a solids content of from about 35 to 50 percent by weight, based on the weight of the total alkali metal solution, and (b) from about 0.1 to 10 percent by weight, based upon the weight of the total binder composition, of at least one reductively aminated mono-, di-, or oligosaccharide, and the use of such binder compositions in the preparation of molds or cores for metal casting.

Abstract: A process is herein described for the manufacture of high purity, granular silicic acid from aqueous alkali metal silicate solutions by acidification thereof, freezing and subsequently thawing the reaction mixture, and filtering, washing and drying the insoluble residue formed, in which the alkali metal silicate solutions have a molar ratio of SiO.sub.2 :Me.sub.2 O of from about 2:1 to 20:1, Me representing an alkali metal, and before freezing the aqueous alkali metal silicate solutions are adjusted to a pH value in the range of from about 2.5 to 6 and to a SiO.sub.2 content of from about 1 to 10 percent by weight by means of one or more aqueous solutions or suspensions of organic acids which complex aluminum, titanium, and iron ions and which form soluble alkali metal salts under the conditions of the process.

Abstract: A method for processing steel strip, which comprises cold-rolling the steel strip, coiling the rolled steel strip and annealing the coiled steel strip, wherein a rolling oil emulsion containing 0.1 to 5 percent by weight of SiO.sub.2 in the form of stabilized silicic acid sol and having a pH value between 5.0 and 9.0 is applied to the steel strip prior to coiling and the rolling oil emulsion so employed.

Abstract: A process for the production of zeolitic alkali metal aluminosilicates by the reaction of aqueous alkali metal silicate solutions with an aqueous alkali metal aluminate solution containing sulfate anions at temperatures of 0.degree. C to 110.degree. C under a shearing type of agitation and conversion of the amorphous precipitate to crystalline forms by maintaining an aqueous suspension of the amorphous form at temperatures of 40.degree. C or over for a time sufficient to effect crystallization, whereby formation of substantial amounts of inactive nosean are avoided.