Cleaning composition containing a colorant stabilized against fading
US4803008A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1987 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Sep 23, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/909
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous cleaning composition comprising a surfactant; up to about 50% of a higher boiling solvent, typically an alkyl ether of an alkylene glycol, said solvent introducing impurities into the composition in an amount and of a nature normally chemically incompatible with oxidizable dye chromophores; a dye in an amount to provide a desired tinctorial value, and a stabilizer selected from the group consisting of salts suitable to provide iodide and thiosulfate anions in an amount effective to retard fading of the dye, said compositions having a basic pH when the stabilizer is the thiousulfate salt. In another aspect of the invention, the stabilizer incorporated into compositions containing a solvent, a surfactant, and water, and optionally a dye provides a beneficial cleaning result. In yet another aspect of the invention, the stabilizer beneficially retards the development of malodors when the compositions of the present invention are contained in a PVC container. Broadly, the incorporation of the stabilizer in said solvent can be employed to neutralize said impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.