CPC C08J 9/236 (2013.01) [C08J 3/075 (2013.01); C08J 2203/22 (2013.01); C08J 2205/02 (2013.01); C08J 2300/26 (2013.01); G01N 29/032 (2013.01); G01N 29/036 (2013.01); G01N 2291/02433 (2013.01)] | 21 Claims |
1. An article comprising:
an elastomeric jacket;
a gel within the jacket; and
a plurality of gas-filled, polymerically-encapsulated microbubbles suspended in the gel;
wherein the microbubbles have a Gaussian particle size distribution; and
wherein the largest microbubble has a diameter at least 10 times the diameter of the smallest microbubble.
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