The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 1980
Filed:
Oct. 12, 1977
Paul Couchoud, Dardilly, FR;
Yves Vaginay, Lyons, FR;
Rhone-Poulenc-Textile, Paris, FR;
Abstract
Flame-resistant copolyesters are disclosed consisting or consisting essentially of from 85 to 99.5% of repeating units of the formula --CO--R--CO--O--R.sub.1 --O-- in which R is a divalent aromatic radical and R.sub.1 is a divalent aliphatic, cycloalkane radical or a mixture of two or several of these radicals; and least 0.5% of units of the formula: ##STR1## in which Me represents a metal such as Na, K, Ca or Zn, and Z represents a paraphenylene group or a divalent aliphatic grouping which contains from 1 to 18 carbon atoms, and may comprise heteroatoms, and is optionally branched, the branch being an aliphatic radical which may be halogenated, and comprises from 1 to 6 carbon atoms; and from 0 to 14.5% of units produced from a brominated compound of the formula: ##STR2## in which R.sub.5 is zero or represents a grouping: ##STR3## and A and A' represent either --CO--OX groups, where X=H or a lower alkyl group, or --X'OH groups, where X'=a--OCH.sub.2 --CH.sub.2 --.sub.n group, and n=1 to 10. These copolyesters may advantageously be used for producing textile threads, fibers and films.