Polyesters colored with the residue of heat stable anthraquinone compounds
US4999418A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1989 |
| Grant date | Mar 12, 1991 |
| Priority date | — |
| Expiry date | Aug 31, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B69/101
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed are colored polyester compositions comprising a polyester having reacted therewith or copolymerized therein at least one residue of an anthraquinone compound having the formula ##STR1## wherein AQ is the residue of a 9,10-anthraquinone radical; R.sup.1 and R.sup.2 are the same or different and are unsubstituted or substituted alkyl, cycloalkyl or aryl; X is a group reactive with at least one of the functional groups of the monomers from which the polyester is prepared; and n is 1 or 2. The described anthraquinone compounds possess improved thermal stability and thus are not decomposed at the high temperatures at which polyesters are prepared. Also disclosed are shaped articles, particularly containers, fabricated from the colored polyester compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.