PREPARATION FOR RENDERING INORGANIC BUILDING MATERIALS WATER-REPELLENT

PREPARATION FOR RENDERING INORGANIC BUILDING MATERIALS WATER-REPELLENT

A composition for making building materials water-repellent, before or after they are shaped, the composition containing organoalkoxysiloxanes of the formula in which R1 is an alkyl or aryl radical, R2 is an alkyl radical with 1 to 4 carbon atoms, a=0.8 to 1.5, and b is not greater than 2. The compo...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: FRITSCH, HERWIG, SCHAMBERG, ECKEHARD, KOERNER, GOTZ, QUILITSCH, HERBERT
Format: Patent
Sprache:eng ; ger
Schlagworte:
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
REFRACTORIES
SLAG
THEIR PREPARATION OR CHEMICAL WORKING-UP
TREATMENT OF NATURAL STONE
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:A composition for making building materials water-repellent, before or after they are shaped, the composition containing organoalkoxysiloxanes of the formula in which R1 is an alkyl or aryl radical, R2 is an alkyl radical with 1 to 4 carbon atoms, a=0.8 to 1.5, and b is not greater than 2. The composition contains (a) 1 to 20% by weight of a mixture of organoalkoxypolysiloxanes of the aforementioned formula, 25 to 75% weight of organoalkoxysiloxanes having a b-value of 0.1 to 0.5 (siloxanes A) and 75 to 25% by weight of the organopolysiloxanes having a b-value 0.8 to 2.0 (siloxanes B), and in which the sum of a and b is not greater than 3, (b) 80 to 90% by weight of a water immiscible solvent and, if necessary, (c) known condensation catalysts. The organoalkoxysiloxane mixture has a surprisingly increased stability on alkaline walling. At the same time, a high depth of penetration and good surface effectiveness are observed.