| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting fixture and a lamp cover wherein generation of yellowing is scarce, and a light transmittance is highly maintained even in the case a lamp is turned on for a long term under a high temperature environment. SOLUTION: This lamp cover is constituted of an alicyclic structure-containing polymer having 1 to 70 wt% of a tetracyclododecene monomer unit, 19 to 90 wt% of a tetracyclododecene monomer unit having a substituent, and 1 to 80 wt% of a norbornene series 3-ring diolefin monomer unit having a substituent. COPYRIGHT: (C)2005,JPO&NCIPI
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