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Title: Thermally stable, rigid polyesters from thermally stable, rigid dibasic acids and aromatic dihydroxy compounds

Abstract: Thermally stable, rigid dibasic acids of the formula ##STR1## where R is ##STR2## where R.sup.1 is arylene or substituted arylene, are used to prepare thermally stable, rigid polyesters of the formula ##STR3## WHERE R.sup.2 is arylene or substituted arylene, and n is at least 10.


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Inventors: Frazer, August Henry (Wilmington, DE, US)

Application Number: 751086
Filing Date: 1976-12-16
Publication_date: 1978-04-18
Assignee: E. I. DuPont de Nemours and Company (Wilmington, DE)
Primary Class(es): 528/296 528/176, 528/274, 528/298, 528/299, 560/85, 560/89
Other Classes:
US Patent Ref:
3440221Apr, 1969Quisenberry260/75.
3477989Nov, 1969Zorn et al.260/47.
3511809May, 1970Hogsed et al.260/47.
3522217Jul, 1970Weimar260/75.

Other Refs:
Primary Examiner: Phynes, Lucille M.
Assistant Examiner:
Attorney: