Abstract: Antifoam compositions on the basis of an .alpha.-hydroxyamine derivative of the formula ##STR1## wherein A is --NHCO-- or --NHCONH--, R.sub.1 and R.sub.2 are H or alkyl having 1 to 22 carbon atoms and the sum of the carbon atoms in R.sub.1 and R.sub.2 is from 8 to 22, and R.sub.3 is alkyl having 8 to 22 carbon atoms or hydroxyalkyl having 8 to 22 carbon atoms; as well as the process of controlling foam in a foamable liquid by introducing therein an antifoam effective amount of said .alpha.-hydroxyamine derivative. The antifoam .alpha.-hydroxyamine derivatives are effective antifoam agents for most industrial purposes and are suitable for use in oil and latex paints.

Abstract: Liquid dispersions of the higher (C.sub.22-70) aliphatic ketones and higher (C.sub.22-70) aliphatic secondary alcohols are effective antifoaming agents when they are of fine particle size. The particle size should be at least sufficiently small that the dispersion does not substantially separate under normal storage conditions. The dispersed phase can be water or an organic liquid in which the dispersed phase is substantially insoluble. The dispersions are effective anti-foam agents for most industrial purposes, and are suitable for use in oil and latex paints.

Abstract: Antifoam compositions on the basis of a bis-.alpha.-hydroxyamine derivative of the formula ##STR1## wherein A is --NHCO--R.sub.3 --CONH-- or --NHCONH--R.sub.3 --NHCONH--, R.sub.1 and R.sub.2 are H or alkyl having 1 to 22 carbon atoms and the sum of the carbon atoms in R.sub.1 and R.sub.2, in each case, is from 8 to 22,R.sub.3 is alkylene having 2 to 10 carbon atoms, phenylene, alkylphenylene having 1 to 3 carbon atoms in the alkyl or a polysiloxane of the formula ##STR2## WHERE N = 2 OR 3 AND P = 2 TO 20; AS WELL AS THE PROCESS OF CONTROLLING FOAM IN A FOAMABLE LIQUID BY INTRODUCING THEREIN AN ANTIFOAM EFFECTIVE AMOUNT OF SAID BIS-.alpha.-HYDROXYAMINE DERIVATIVE. The antifoam bis-.alpha.-hydroxyamine derivatives are effective antifoam agents for most industrial purposes and are suitable for use in oil and latex paints.

Abstract: A process for preparing waterproof leathers by fat-liquoring with an aqueous liquor containing esters of citric acid with higher fatty alcohols which are used as the impregnating agent, characterized in that the fat-liquoring agent contains a mixture emulsified in water which consists of (A) an acid ester of citric acid with a higher fatty alcohol having chain lengths of 12 to 22 carbon atoms and (B) an organic alcohol solvent for the citric acid ester which is totally or partially soluble in water and which have a boiling point above 100.degree.C.