Cycloolefin random copolymer and process for preparing same
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United States of America Patent
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Dec 21, 1993
Grant Date -
N/A
app pub date -
Mar 6, 1991
filing date -
Mar 6, 1990
priority date (Note) -
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Abstract
In accordance with the present invention, there are provided cycloolefin random copolymers composed of ethylene and cycloolefin and containing substantially no polyethylene, and processes for preparing the same. Optical disc substrates prepared from the above-mentioned copolymers are excellent in transparency and also capable of minimizing the occurence of errors in reading of the discs due to quality of the substrates used therefor.
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