Molding material for plastic lens
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United States of America Patent
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Nov 26, 2002
Grant Date -
N/A
app pub date -
Dec 6, 1999
filing date -
Jun 6, 1997
priority date (Note) -
Expired
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Abstract
A molding material for plastic lenses, comprising a hydrogenated product of an aromatic vinyl polymer, wherein the hydrogenated product of the aromatic vinyl polymer has properties that the hydrogenation rate of aromatic rings is at least 97%, the weight average molecular weight (Mw) is within a range of 50,000 to 500,000, and the ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) is at most 2.5, a plastic lens obtained by molding the molding material, novel hydrogenated products of aromatic vinyl polymers, which are suitable for use as molding materials, and a production process thereof.
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