Copolyesters prepared from phosphorus compounds which can be shaped and which have reduced flammability
US4210740A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1978 |
| Grant date | Jul 1, 1980 |
| Priority date | — |
| Expiry date | Jan 30, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/6924
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to copolyesters having high flame resistance, and comprising essentially 85% to 99.5% of repeating units of the formula --CO--R--CO--O--R.sub.1 --O--, in which R is an aromatic radical, and R.sub.1 is a divalent aliphatic, cycloaliphatic or cyclanic radical, or a mixture of two or more of these radicals; PA0 at least 0.5% of units of the formula: ##STR1## in which R' is a lower alkyl group, and R" is an aliphatic, aromatic or arylaliphatic radical; PA0 and 0 to 14.5% of units produced from a compound of the formula: ##STR2## in which R.sub.2 is zero or represents an ##STR3## --CH.sub.2 -- or --O-- group, and A and A' represent either --CO--OX groups, in which X.dbd.H or a lower alkyl group, or --X'0H groups in which X'.dbd.a --(OCH.sub.2 --CH.sub.2 -- group and n=1 to 10. These copolyesters may be used advantageously for producing textile yarns and fibers, films, and molded or extruded articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.