HDK H18 silica has been developed specifically for use in polar systems, such as epoxy resins and polyurethanes. It is
characterized by a high specific surface
area, and has a specific coating which
renders it highly hydrophobic. This makes
it particularly adept at controlling the
rheology of polar systems.In HDK® H18, WACKER offers a new
grade of pyrogenic silica that exhibits a
superior level of performance, especially
in these bonding pastes. It is readily
incorporated into epoxy resins to impart
an exceptionally high viscosity and
remarkable storage stability. What is
more, since comparatively little HDK H18 silica
is required, the cured adhesive has less
tendency to embrittle.