Composite foams

摘要

Composite foams are provided comprising a first rigid, microcellular, open-celled organic polymer foam having a density of from about 0.015 g/cm3 to about 0.20 g/cm3 and a pore size of from about 1 micron to about 30 microns, said first foam containing a second polymer having a density of from about 0.015 g/cm3 to about 0.20 g/cm3 or a second polymer foam having a density of from about 0.015 g/cm3 to about 0.20 g/cm3 and a pore size of from about 0.01 microns to about 1.0 micron within the open cells of said first foam.