To improve light resistance in a thin wall part in a light-resistant member having the thin wall part and to enhance long-term reliability.
Liquid crystalline polyester in the thin wall part includes structural units represented by the following formula (1), (2), and (3). Assuming that the total of bivalent aromatic groups Ar1, Ar2, and Ar3 included in formula (1), (2), and (3) is 100 mol%, 25 mol% or more of 2, 6-naphthalenediyl group is included. The flow start temperature is 280°C or higher. The formulae are as follows: (1)-O-Ar1-CO-, (2)-CO-Ar2-CO-, and (3)-O-Ar3-O-, wherein Ar1 represents one or more groups selected from the group consisting of 2, 6-naphthalenediyl group, 1, 4-phenylene group, and 4, 4'-biphenylene group; and Ar2 and Ar3 each independently represents one or more groups selected from the group consisting of 2, 6-naphthalenediyl group, 1, 4-phenylene group, 1, 3-phenylene group, and 4, 4'-biphenylene group.
HOSODA TOMOYA
OKAMOTO SATOSHI
| JP2005213418A | 2005-08-11 | |||
| JP2005158085A | 2005-06-16 | |||
| JP2005272819A | 2005-10-06 | |||
| JP2009155623A | 2009-07-16 |
Akio Ishii