Patent ID: 7744993

Claim:
A polymer composite foam having a multi-layer construction, comprising: a first layer comprising: a first polymer capable of being formed into a polymeric foam; and an edge-modified phyllosilicate filler having a median particle size of about 0.1 nm-10 μm and a surfactant adsorbed only onto the edges thereof, the edge-modified phyllosilicate filler being exfoliated, delaminated, or intercalated; wherein the first polymer defines a plurality of foam cells dispersed therethrough, and the edge-modified filler is dispersed throughout the first polymer; and a second layer comprising a second polymer capable of being formed into a polymeric foam and a non-treated phyllosilicate filler dispersed throughout the second polymer, wherein the edge-modified phyllosilicate filler and non-treated phyllosilicate filler comprise layers of particles stacked one on top of another.