Polymeric blue anthraquinone-derivative colorants
US6593483B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 2001 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Dec 13, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/33396
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Blue colorants comprising a chromophore having at least one poly(oxyalkylene) chain attached to the 1- position, the 4- position, or both, through aromatic amino group or groups, of an anthraquinone backbone are provided. Such colorants exhibit excellent amine/base stability and thermal stability, effective colorations, excellent low extraction rates, and high lightfastness levels, particularly when incorporated within certain media and/or on the surface of certain substrates, particularly polyesters, polyolefins, and polyurethanes. The poly(oxyalkylene) chain or chains can be conveniently tailored to increase the solubility or compatibility in different solvents or resins thereby permitting the introduction of such excellent coloring chromophores within diverse media and/or or diverse substrates as well as provides a liquid colorant which facilitates handling. Compositions and articles comprising such colorants are provided as well as methods for producing such inventive colorants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.