Photochromic aziridine recording media
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United States of America Patent
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-
Dec 2, 1980
Issued Date -
N/A
app pub date -
Dec 28, 1978
filing date -
Dec 28, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Photochromic aziridines of the formula ##STR1## wherein R.sub.1 and R.sub.2 taken separately are hydrogen, lower alkyl, phenyl, or ortho or para lower alkyl or lower alkoxy substituted phenyl, and wherein R.sub.1 and R.sub.2 taken together are alkylene having 4 to 7 carbon atoms, inclusive, are vapor deposited on a substrate, followed by application of a barrier coating which is substantially oxygen-impermeable to thereby provide a thermally stable optically erasable recording medium.
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