Low-melting aromatic polyesters with repeating 2,2'-substituted-biphenylene radicals
AssigneePolaroid Corporation, Patent Dept.
InventorsHoward G. Rogers, Russell A. Gaudiana, Richard A. Minns, Roger F. Sinta
Life of this patent
Estimating the term…
Abstract
A class of aromatic polyesters exhibiting melt processability is disclosed. A portion of repeating 2,2'-substituted-biphenylene radicals in an aromatic polyester is replaced by certain other aromatic radicals to provide an aromatic polyester which exhibits low-melting properties, melt processability and melt anisotropy. The aromatic polyesters can be melt processed to films and fibers.
Claims22
A melt-processable polyester comprising repeating radicals of the formulas ##STR20## wherein X is a substituent other than hydrogen, and k represents the molar amount of the formula (I) radical in the polyester;
- ##STR21## wherein Y is hydrogen or a substituent other than hydrogen, and m represents the molar amount of the formula (II) radical in the polyester;
- ##STR22## wherein each of Y' and Y" represents hydrogen or a substituent other than hydrogen, and n represents the molar amount of the formula (III) radical in the polyester;
- and ##STR23## wherein Y"' is hydrogen or a substituent other than hydrogen, and p represents the mole ratio of the formula (IV) radical in the polyester;
- the molar proportions of formula (I), (II), (III) and (IV) radicals conforming to the following relationships:
- ##EQU2##
A melt-processable polyester comprising repeating units of the formula ##STR24## wherein each subscript represents the molar amount of the respective radical in said polyester.
Dependencies are inferred from the claim text.