Patent ID: 8044151
Filing Date: 2011-10-25
Classification: C08G,C09K

Abstract:
1. A wholly aromatic liquid-crystalline polyester consisting of the repeating units represented by formulae (I), (II), (III) and (IV): wherein: the molar proportion of the repeating unit represented by formula (I) based on the total repeating units constituting the wholly aromatic liquid-crystalline polyester is 40-80 mol %; the molar ratio of the total amount of the repeating units represented by formulae (II) and (III) to the repeating unit represented by formula (IV) is from 90/100 to 100/90; the molar proportion of the repeating unit represented by formula (II) based on the total amount of the repeating units represented by formulae (II) and (III) is 90-98 mol%; and the two “—O—” attached to the benzene ring in formula (III) are positioned meta or para to each other and “Ar” in formula (IV) represents a bivalent aromatic group; wherein the repeating unit represented by formula (IV) is one or two repeating units selected from the group consisting of the repeating units represented by the following formulae (1) and (3): and wherein: the Izod impact strength of said wholly aromatic liquid-crystalline polyester measured according to ASTM D256 using the bending test piece with length of 64 min, width of 12.7 mm and thickness of 2.0 mm is greater than or equal to 100 J/m.