Rigid foam
polyether The polyether polyol for rigid PU foam is
generally of high functionality and high hydroxyl value, can
produce enough crosslinking degree and rigidity. The hydroxyl value
of rigid foam polyether polyol generally is **0 ~ **0 mgKOH/g, the
average 3 more functionalities. Generally rigid PU foam mixed
with 2 kinds of polyethers, average hydroxyl value at about **0
mgKOH/g.
