Henkel Kommanditgesellschaft Auf Aktien

Henkel Kommanditgesellschaft

Hansawerke Lurmann, Schutte & Co.

Cognis IP Management Gmbh

Wolfgang Pesch

Wolfgang Friedemann

Ralf Bohlander

Gunter Beer

Hans Fehr

Kurt Feulner

Helmut V Freyhold

Manfred Kupfer

Alfred Koster

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.

Sealing and/or stabilizing and/or binding preparations comprising alkali

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.

Hardener for silicate soil stabilizers

A binder composition for coatings, adhesives, and the like is afforded comprising an aqueous mixture of at least one alkali silicate and at least one maleic acid anhydride ethylene or methylvinyl ether copolymer.

Binder compositions based on alkali metal silicate solutions

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. The alkali metal silicate solution used has, in the case of sodium silicate, a solids content of about 27% to 43% by weight at an SiO.sub.2 /Na.sub.2 O molar ratio of about 4 : 1 to 3 : 1 and in the case of potassium silicate a solids content of about 20% to 36% by weight at an SiO.sub.2 /K.sub.2 O molar ratio of about 4 : 1 to 3.4 : 1, it being possible to use any desired mixture ratios of the mentioned alkali metal silicates. The mixture may optionally contain an addition of 0.1% to 2.5% by weight, preferably from 1% to 2% by weight of B.sub.2 O.sub.3. Preferably the wetting agent added to the mixture is an anionic tenside, such as a sodium C.sub.14-16 alkylsulfonate, in an amount of from 0.1% to 10% by weight, preferably from 4% to 6% by weight in the form of a 30% aqueous solution. The fillers to be added to the mixture are inorganic compounds of light specific gravity in a grain size up to 0.1 mm and in an amount of up to 50% by weight, preferably from 10% to 20% by weight. The hardeners are preferably proportioned into the mixture during foaming in amounts of from 1% to 10% by weight, preferably from 2% to 6% by weight. The preferred hardener is glycerine triacetate.

Method for the production of more water-resistant foamed elements from

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.

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Grevenbroich, Germany

Wolfgang Pesch