Retroreflective article
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United States of America Patent
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May 26, 1992
Grant Date -
N/A
app pub date -
Sep 21, 1990
filing date -
Sep 21, 1990
priority date (Note) -
Expired
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Abstract
The present invention provides improved, flexible retroreflective articles based upon an optically clear, aliphatic polyurethane polymer. The aliphatic polymer has a plurality of hard chain segments of the formula --C(O)N(H)--C.sub.6 H.sub.10 --N(H)C(O)--.
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