Polyoxalkylenated disazo colored thermoplastic resins
US5955523A · kind A · utility
17Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1997 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | Nov 7, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L23/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disazo chromphores having at least two different poly(oxyalkylene) substituents are linked together by a covalent bond or by an intervening connecting group to form dimers. The preferred poly(oxyalkylene) substituents are straight chain polymers consisting of ethylene oxide and propylene oxide. The disazo colorants are useful for coloring thermoplastic resins such as polypropylene and polyethylene and show improved extraction, migration, clarity and thermal stability characteristics as compared to standard monoazo colorants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.