Hoechst Aktiengesellschaft

Franz J Voetz

Adolf May

Peter Eckardt

August Gerl

Shaped articles made from expanded minerals, otained by using a mineral binder system composed either of calcium aluminate and aluminum phosphate or of waterglass and a catalyst to consolidate an expanded mineral which has been rendered hydrophobic and wherein the expanded mineral is rendered hydrophobic by means of an organosiloxane.

Shaped articles made from expanded minerals

Shaped articles made from expanded minerals obtained by treating a mixture of a hydrophobized expanded mineral and a calcium aluminate with an aqueous solution of aluminum phosphate, and subsequently consolidating it under the action of pressure and heat; the expanded mineral having been hydrophobized with a hydrophobizing agent consisting substantially of

A water-repellent gypsum mortar contains an agent conferring hydrophobic properties, which is composed of (a) a fatty amine of the formula ##STR1## in which R.sub.1 is C.sub.8 -C.sub.22 -alkyl, C.sub.8 -C.sub.22 -alkenyl or C.sub.8 -C.sub.22 -alkylphenyl, R.sub.2 and R.sub.3 are hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.2 -C.sub.4 -alkenyl, C.sub.1 -C.sub.4 -alkoxy-C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -hydroxyalkyl, phenyl, benzyl or a group of the formula --(CH.sub.2 CH.sub.2 O).sub.n H and n is a number from 0 to 4,

Water-repellent gypsum mortar

Shaped articles made from expanded minerals, obtained by solidification of a mixture of water glass, catalyst and an expanded mineral pretreated with a hydrophobizing agent which comprises substantially

Filler slurries with a content of 0.1 to 5% by weight of a compound of the formula ##STR1## in which R is hydrogen or methyl, R.sub.1 is C.sub.8 -C.sub.24 -alkyl, C.sub.8 -C.sub.24 -alkenyl or C.sub.8 -C.sub.24 -alkylphenyl, R.sub.2 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -hydroxyalkyl, C.sub.2 -C.sub.4 -epoxyalkyl, benzyl or a group of the formula ##STR2## X, Y and Z together are a number from 1 to 20, and A means an anion.

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Camberg, Germany

Franz J Voetz