Colored polyester containing copolymerized dyes as colorants
US4359570A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1981 |
| Grant date | Nov 16, 1982 |
| Priority date | — |
| Expiry date | Oct 26, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/688
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are colored polyester compositions containing copolymerized anthraquinone dyes as colorants, which compositions may be used, for example, for food packaging and to mold colored beverage bottles. The copolymerized dyes are thermally stable at the processing temperatures, and are colorfast and nonextractable. The useful dyes have the general formula: ##STR1## wherein either or both of rings A and B may contain in any position thereon one or two groups of the formula ##STR2## R and R.sup.3 each is hydrogen, lower alkyl or lower hydroxyalkyl; R.sup.1, R.sup.2, R.sup.4 and R.sup.5 each is hydrogen or 1-3 substituents such as lower alkyl, lower alkoxy, phenyl, Cl, Br, or the like; X is --S-- or --NH--; n is 1 or 2; m is 0, 1, or 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.