Chelating agents for improved color fidelity
US5686376A · kind A · utility
16Cited by
12References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1996 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Nov 21, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/364
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Rinsing dyed or white fabrics in a chelator-containing rinse bath restores color and brightness. Rinse added compositions comprising chelators such as diethylenetriaminepentaacetate or ethylenediamine disuccinate are used to restore the appearance of colored and white fabrics whose drab appearance has been caused by interactions with metal ions, especially copper and nickel. Compositions comprising the chelators in combination with fabric care auxiliaries such as fabric softeners, cellulase enzymes and chlorine scavengers are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.