Self-adhesive detergent compositions with color-changing systems
US9926519B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2012 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Feb 28, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D17/003
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Self-adhesive detergent compositions are described including a pH-sensitive color-changing system. The color-changing system is useful with certain acidic compositions and certain alkaline compositions. The compositions have a given color upon application to a hard surface, e.g., a toilet bowl. In one embodiment, when the self-adhesive composition is exposed to a water-based rinse, such as on flushing a toilet, the color-changing system provides the released cleaning portion of the composition, and thereby the water, with a color different from the color of the composition to indicate cleaning is occurring. In another embodiment, following exposure to a plurality of rinses, the color-changing system changes the color of the composition when the composition is near depletion to provide an “end-of-use” cue. In another embodiment, the color-changing system indicates dual functions by changing the color of the composition to another color when the composition is physically mixed with a rinse to provide manual cleaning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.