Apiezon® Waxes
Select from three different hardness values
The Apiezon family of three different waxes can be used either as a vacuum sealing
compound or as a mounting wax. For work with high vacuum and UHV,
it would be better to use Vacseal® Vacuum Leak Sealant.
Chemical resistance:
While the hydrocarbon based Apiezon waxes are dissolved by most organic
solvents, they are quite resistant to acids and bases such as potassium
hydroxide (KOH) and tetramethyl ammonium hydroxide (TMAH).
Viscosity in the molten form:
The waxes are primarily noncrystalline, or amorphous, and therefore don't
exhibit a melting point but instead a "softening" point, above which the
viscosity drops quickly with increasing temperature. We do not have any
data on the viscosities of the wax after passing through the softening point,
but the melted wax is like tar: As the temperature rises the wax softens
and gradually becomes more fluid. The best way to get wax in liquid form is
to dissolve it in a solvent (we normally recommend d-limonene) but obviously,
the solvent needs to be removed at some point by drying.
Wax W100 is inherently softer than Wax W, thus reducing the risk of cracking glass joints if
they are subject to vibration. But purely in terms of "hardness" or "softness",
Vacseal® Vacuum Leak Sealant is
the very softest since it is a silicone formulation.
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Friday November 21, 2008
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