Flat plate and light guide plate
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United States of America Patent
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Dec 24, 2002
Grant Date -
N/A
app pub date -
Feb 3, 1999
filing date -
Feb 3, 1998
priority date (Note) -
Expired
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Abstract
A flat plate made of a cycloolefin polymer comprising at least 30% by weight, based on the cyclopolefin polymer, of repeating units (A) having an alicyclic structure. The repeating units (A) comprises at least 30% by weight, based on the repeating units (A), of repeating units (A-i) having no norbornane structure. The cycloolefin polymer has a weight average molecular weight of 5,000 to 50,000. The flat plate is especially useful as a light guide plate.
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