Abstract
Surfactant mixtures for the
production of stable gas-in-liquid emulsions are provided comprising:
(a) a member selected from the group consisting of glycerol monoesters
of saturated carboxylic acids containing from about 10 to 18 carbon
atoms and aliphatic alcohols containing from about 10 to about 18 carbon
atoms;
(b) a sterol-aromatic acid ester;
(c) a member
selected from the group consisting of sterols, terpenes, bile acids and
alkali metal salts of bile acids;
(d) a member selected from the
group consisting of sterol esters of aliphatic acids containing from 1
to about 18 carbon atoms; sterol esters of sugar acids; esters of sugar
acids and aliphatic alcohols containing from about 10 to about 18 carbon
atoms; esters of sugars and aliphatic acids containing from about 10 to
about 18 carbon atoms; sugar acids; saponins; and sapogenins; and
(e) a member selected from the group consisting of glycerol, glycerol di-
or triesters of aliphatic acids containing from about 10 to about 18
carbon atoms and aliphatic alcohols containing from about 10 to about 18
carbon atoms;
said components being present in said mixture in a
weight ratio a:b:c:d:e of 2-4:0.5-1.5:0.5-1.5:0-1.5:0-1.5.
Processes are also provided for forming stable gas-in-liquid emulsions from said surfactant mixtures.