Erasable optical disk having an improved optically transparent substrate
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United States of America Patent
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Jun 2, 1992
Grant Date -
N/A
app pub date -
Mar 9, 1987
filing date -
Mar 7, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An erasable optical disk having a grooved substrate which is made of a cured polymer product formed by radical polymerization of a composition comprising a specific type of (meth)acrylate compound alone or in combination with at least one compound selected from N-substituted maleimide compounds and epoxy-novolac (meth)acrylate compounds. The substrate has a good heat resistance, a good transparency, and can be produced at a high productivity.
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