Patent ID: 9005745
Filing Date: 2015-04-14
Classification: C08J,C08L,Y10T

Abstract:
1. A rigid, extruded polymer foam board product comprising: a composition comprising: a polymer material comprising greater than about 95% by weight of polystyrene; from about 2.5% to about 10% by weight of a blowing agent composition wherein the blowing agent composition comprises carbon dioxide present up to about 6.0 parts per hundred based on the weight of the polymer material; and from about 1% to about 5% by weight water-impregnated activated carbon having an average particle size from about 10 microns to about 30 microns; wherein the water-impregnated activated carbon comprises an impregnated water content from about 0.2% to about 2% by weight of the polymer material; wherein the rigid, extruded polymer foam board product comprises: at least about 95% closed cells, an average density from about 1.5 lbs/ft a monomodal cell size distribution with an average cell size from about 250 microns to about 400 microns.