Process for producing hydrogenated .alpha.-olefin-dicyclopentadiene copolymer, method for molding the same and optical material
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United States of America Patent
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Nov 5, 2002
Grant Date -
Jul 26, 2001
app pub date -
Mar 9, 2001
filing date -
Jun 10, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process for producing a hydrogenated .alpha.-olefin-dicyclopentadiene copolymer. The process includes a step of distilling of unreacted dicyclopentadiene or tetrahydrodicyclopentadiene which is a hydrogenated product of unreacted dicyclopentadiene from a mixture containing .alpha.-olefin-dicyclopentadiene copolymer or its hydrogenated product in the presence of a high-boiling hydrocarbon solvent having a boiling point of 195 to 300.degree. C. and an ignition point of 260.degree. C. or more. Method for melt molding the hydrogenated .alpha.-olefin-dicyclopentadiene copolymer is also proposed.
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