Patent ID: 7550093
Filing Date: 2009-06-23
Classification: C08J,C09K,H05K,Y10T

Abstract:
1. A liquid-crystalline polyester obtainable by polymerizing monomers (1) to (4) which derive structural units represented by formulas (i) to (iv) respectively below: wherein Ar1 represents 1,4-phenylene, 2,6-naphtylene or 4,4′-biphenylene, Ar2 represents 1,4-phenylene or 1,3-phenylene, X represents —O— or —NH—, Ar3 represents 1,4-phenylene, 1,3-phenylene or 2,6-naphthylene, Ar4 and Ar5 independently represent 1,4-phenylene, 2,6-naphthylene or 4,4′-biphenylene, and Z represents —O—, —SO in which the amount of monomer (1) is 30-80% by mol, the amount of monomer (2) is 10-35% by mol, the total amount of monomers (3) and (4) is 10-35% by mol and the amount of monomer (4) is 1% by mol or larger, the amounts of which are all on the molar basis of the total amount of monomers (1) to (4).