Patent ID: 9359481
Filing Date: 2016-06-07
CPC Classification: B82Y,C08J,F16L,Y10T

Claim Text:
1. An extruded polymeric foam material comprising: foam structures comprising: a polymer comprising at least about 80% polystyrene, wherein said polymer has a molecular weight from about 30,000 to about 500,000; from about 0.05 wt. % to about 5 wt. % nano-graphite having a size, in at least one dimension, of less than about 100 nanometers, wherein said nano-graphite provides a compressive strength that is about 30% greater than an otherwise identically extruded polymeric foam material containing no nano-graphite; and at least one blowing agent, wherein said foam structures comprise cell walls and struts that define cells having morphological parameters, wherein said morphological parameters include an elongated cell orientation, wherein a ratio of the cell dimension in an extrusion direction to the cell dimension in a thickness direction is either less than one or greater than 1 and up to 1.54; and wherein the foam material is a rigid, closed cell, insulating foam board having an R-value per inch ranging from about 3 to about 8 and a median cell size of less than about 150 microns.