Process for making a dimensionally-stable open-cell polypropylene foam with organic blowing agents
AssigneeThe Dow Chemical Company
InventorChung P. Park
Life of this patent
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Abstract
Disclosed is a process for making a low density, dimensionally-stable, open-cell, extruded propylene polymer foam comprising primarily an expanded propylene polymer material wherein the foam has a blowing agent comprising greater than 85 percent by weight of one or more organic blowing agents based upon the total weight of the blowing agent. The propylene polymer material comprises more than 50 weight percent or more of propylene monomeric units based upon the total weight of the propylene polymer material. The foam has a density about 96 kilograms or less per cubic meter. The foam is greater than 20 percent open cell.
Claims9
A dimensionally-stable, extruded, open-cell, propylene polymer foam, comprising:
- a propylene polymer material comprising greater than 50 percent by weight of propylene monomeric units, the foam having a density about 96 kilograms per cubic meter or less, the foam being greater than 20 percent open cell, the foam being in plank form, the foam having a major dimension in cross-section of about 5 centimeters or more, the foam have a cross-sectional area of about 10 square centimeters or more.
Dependencies are inferred from the claim text.