Shaped articles made from expanded minerals

US4391644A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Peter Eckardt · Hofheim, DE
• Franz J. Voetz · Bad Camberg, DE

Key dates

• Filing date: Jan 21, 1982
• Grant date: Jul 5, 1983
• Expiry date: Jan 21, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2103/65
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

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 PA0 (a) a fatty amine of the formula ##STR1## in which R.sub.1 is C.sub.8 -C.sub.22 -alkyl, preferably C.sub.14 -C.sub.22 -alkyl, C.sub.14 -C.sub.22 -alkenyl or C.sub.8 -C.sub.22 -alkylphenyl, R.sub.2 and R.sub.3 each are hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.2 -C.sub.4 -alkenyl, phenyl or benzyl, and n is a number of from 0 to 4; PA0 (b) a fatty acid of the formula EQU R.sub.5 CO(OCH.sub.2 CH.sub.2).sub.m OH PA0 or a fatty alcohol of the formula EQU R.sub.6 (OCH.sub.2 CH.sub.2).sub.m OH PA0 in which R.sub.5 is C.sub.8 -C.sub.22 -alkyl, preferably C.sub.14 -C.sub.22 -alkyl or -alkenyl, R.sub.6 is C.sub.9 -C.sub.23 -alkyl, preferably C.sub.15 -C.sub.23 -alkyl or -alkenyl, and m is a number of from 0 to 2; and PA0 (c) a low molecular weight acid.