Thermoplastic liquid crystal polymer and film of same
AssigneeKuraray Co., Ltd.
InventorsTakafumi Konno, Tatsuya Sunamoto, Michiyuki Nanba, Tetsuya Hara
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Abstract
Provided are a thermoplastic polymer capable of reducing a dielectric dissipation factor in high frequency bands and a film thereof. The thermoplastic liquid crystal polymer includes repeating units represented by the following formulae (I), (II), (III) and (IV), in which a molar ratio of a total amount of the repeating units represented by formulae (I) and (II) to a total amount of all the repeating units in the thermoplastic liquid crystal polymer is 50 to 90 mol %, and a molar ratio of the repeating unit represented by formula (III) to the repeating unit represented by formula (IV) is the former/the latter=23/77 to 77/23.
Claims14
A thermoplastic liquid crystal polymer comprising repeating units derived from hydroxycarboxylic acids, dicarboxylic acids, and diols,
- wherein the repeating units derived from the hydroxycarboxylic acids comprise a repeating unit represented by the following formula (I);
- the repeating units derived from the dicarboxylic acids comprise a repeating unit represented by the following formula (II);
- and
- the repeating units derived from the diols comprise repeating units represented by the following formulae (III) and (IV):
- wherein Ar1 and Ar2 represent divalent aromatic groups that are different from each other, and
- wherein a molar proportion of a total amount of the repeating units represented by formulae (I) and (II) based on a total amount of all repeating units in the thermoplastic liquid crystal polymer is 50 to 90 mol %,
- a molar ratio of the repeating unit represented by formula (III) to the repeating unit represented by formula (IV) is the former/the latter=23/77 to 77/23, and
- a molar proportion of an amount of the repeating unit represented by formula (I) based on a total amount of all the repeating units derived from the hydroxycarboxylic acids in the thermoplastic liquid crystal polymer is 85 mol % or higher.
Dependencies are inferred from the claim text.