Water-free preparation process for multimodal thermoplastic polymer foam and foam therefrom
AssigneeDow Global Technologies LLC
InventorsYohannes Chonde, Daniel Imeokparia, John B. Horstman, Robert A. Kirchhoff, Kyung W. Suh
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Abstract
Prepare a multimodal thermoplastic polymer foam having a distribution of large and small cells in a substantial absence of water by using a blowing agent stabilizer. Multimodal foams of the present invention have blowing agent stabilizer predominantly located proximate to large cells. The resulting multimodal foams have particular utility as thermal insulating materials.
Claims14
A thermoplastic polymer foam comprising a thermoplastic polymer resin having a multimodal cell size distribution, the multimodal cell size distribution being shown by a plot of representative cross-sectional area versus cell size that has two or more peaks, one of which corresponds to the smallest cell size(s) and represents small cells and another of which corresponds to the largest cell size(s) and represents large cells, and a blowing agent stabilizer, the blowing agent stabilizer being predominantly located proximate to the large cells.
Dependencies are inferred from the claim text.