Copolymerized anthraquinone-polyester color concentrates
US5032670A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1989 |
| Grant date | Jul 16, 1991 |
| Priority date | — |
| Expiry date | Aug 30, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2467/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Disclosed are color concentrate compositions which comprise a polyester having copolymerized therein at least 0.5 weight percent of an anthraquinone colorant compound having the formula ##STR1## wherein AQ is a 1,5- or 1,8-anthraquinonylene radical; R.sup.1 and R.sup.2 are the same or different and are unsubstituted or substituted alkyl, cycloalkyl or aryl; and X is a group reactive with at least one of the functional groups of the monomers from which the polyester is prepared. Amorphous polyesters and partially-crystalline polyesters are preferred embodiments of the color concentrates. Also disclosed are colored semicrystalline powders which may be obtained from the amorphous and partially-crystalline color concentrates by a dissolution-crystallization-precipitation procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.