Cycloolefin-based polymer and process for producing the same
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United States of America Patent
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Aug 21, 2001
Grant Date -
N/A
app pub date -
Aug 20, 1997
filing date -
Aug 23, 1996
priority date (Note) -
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Abstract
The object of the present invention is to provide a cycloolefin-based polymer with very low content of foreign matters, a molded article obtained by using the cycloolefin-based polymer, and a process for producing the cycloolefin-based polymer. The present invention relates to a cycloolefin-based polymer which has an intrinsic viscosity [.eta.] of 0.01-20 dl/g as determined in decalin at 80.degree. C. and has a content of foreign matters having a particle diameter of 0.5 .mu.m or more of 3.times.10.sup.4 particles/g or less, a process for producing the cycloolefin-based polymer, and a molded material comprising the cycloolefin-based polymer and a molded article obtained therefrom.
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