Norbornene derivative and norbornene polymer obtained therefrom through ring opening polymerization
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United States of America Patent
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Jan 25, 2005
Grant Date -
Dec 2, 2004
app pub date -
Mar 8, 2004
filing date -
Oct 10, 2001
priority date (Note) -
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Abstract
A novel norbornene derivative represented by a general formula (1m) shown below is provided. By conducting a ring opening polymerization of this norbornene derivative, or by performing a subsequent hydrogenation following the ring opening polymerization, a ring opening polymer or a hydrogenated product thereof with an excellent low birefringence can be obtained. ##STR1## [wherein, at least one of R.sup.1 to R.sup.4 is a group selected from the group consisting of groups represented by a general formula (1-1) shown below and groups represented by a general formula (1-2) shown below] ##STR2## [wherein, at least one of R.sup.A, R.sup.B and Z is a group represented by the formula --C(O)O--].
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