• Foam Control in I&I Cleaning
The defoaming properties of Dehydem Supra at 20°C.
The foam-suppressing performance of Dehydem Supra at 65°C.
based emulsion and Dehypon G 2084 from
Cognis. The defoaming performance was
tested and rated on egg white and various
surfactants on a scale of 0 to 5 following a
simulated 20°C cold application. The new
ingredient demonstrated superior defoaming properties on nearly all the foamy sur-
factants and the egg white. The only area
where its score was average was in the
long-term defoaming of fatty alcohol
ethoxylates (FAEO) with a single application of defoamer. It is also suitable for a significantly wider range of applications than
the other two products.
In a further test, the foam-suppressing
performance of Dehydem Supra and the
two other products was assessed. The test
examined the quantity of a foaming agent
that could be added to a foam-controlled,
water-based acidic or alkaline 65°C solution, before the defoamer was no longer