Loading patent…
AssigneeOwens Corning Intellectual Capital, LLC
InventorsMark E. Polasky, Raymond M. Breindel, Roland R. Loh, Yadollah Delaviz, Bharat Patel
Estimating the term…
Provided are methods for producing a high strength, but easily deformed, polystyrene foam board that can endure repeated deformations from its original configuration into more complex curved shapes without damaging the board integrity or substantially reducing its structural strength. Also provided are rigid polystyrene foam boards produced by this method that exhibit improved bending and impact resistance while substantially retaining or improving other properties, for example, the thermal dimensional stability and fire resistance, exhibited by corresponding conventional XPS foam boards. The foamable compositions may incorporate one or more of a variety of polymer processing aids for the purpose of altering the performance of the final foam products, thereby allowing the properties of the final foam product to be customized to some degree.
A method of producing a deformable, non-resilient foam board capable of being formed into a curved shape without significantly resiling, cracking, or otherwise damaging the integrity of the foam board, wherein the foam board is formed from an expanded, solidified molten blend of polystyrene and a vinyl polymer having a melt index of 1 to 2 grams/10 minutes at 190° C., the vinyl polymer containing 20 to 40 mol % copolymerized vinyl alcohol, wherein the amount of vinyl polymer in the molten blend is sufficient so that
Dependencies are inferred from the claim text.