Ocular lens material and process for producing the same
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United States of America Patent
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Dec 16, 1997
Grant Date -
N/A
app pub date -
Feb 5, 1997
filing date -
Jun 6, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An ocular lens material containing a polymer having a maleimide derivative-.alpha.-methylstyrene unit and N,N-dimethylacrylamide unit, which is excellent in optical property, has a high water-absorptive property and a high mechanical strength and further only shows an extremely small size change based on pH change of a solution under the hydrated state, and which can be preferably used for, in particular, water-absorptive contact lenses and the like, and a process for producing the same.
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