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Waste containing asbestos is sealed into two layers of polyurethane bags and then into a plastic container with a lid, she said, while liquids such as bleach and motor oil are poured into drums.

She quit her job as a high school drama teacher to manage her daughter’s career; Keke’s dad, Larry, stopped working at a polyurethane factory to raise the other kids.

The Olympics used red cinder until 1968 and the Mexico City games, which instead featured a polyurethane "Tartan" track, so-called because 3M, which made it, also made Scotch tape.

To test this idea, Wu coated polyurethane devices with their adhesive and implanted them on the abdominal wall, colon, stomach, lung, or heart of rats.

In the decades since their first runs, the group has witnessed changes to the sport far beyond composite skis and polyurethane boots.