| 摘要 |
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 (a) a fatty amine of the formula <IMAGE> in which R1 is C8-C22, preferably C14-C22-alkyl or -alkenyl, or C8-C22-alkylphenyl, R2 and R3 each are hydrogen, C1-C4-alkyl or -alkenyl, phenyl or benzyl, and n is a number of from 0 to 4: (b) a fatty acid of the formula R5CO (OCH2CH2)mOH or a fatty alcohol of the formula R6(OCH2CH2)mOH in which formulae R5 is C8-C22, preferably C14-C22-alkyl or -alkenyl, R6 is C9-C23, preferably C15-C23-alkyl or -alkenyl, and m is a number of from 0 to 2; and (c) a low molecular weight acid.
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