Flame-resistant copolyesters containing phosphonic groups
US4214069A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1977 |
| Grant date | Jul 22, 1980 |
| Priority date | — |
| Expiry date | Oct 12, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/6926
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.