Quantitative detection of non-fluorine anti-soil using a fluorescent trace indicator
US11543354B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2020 |
| Grant date | Jan 3, 2023 |
| Priority date | — |
| Expiry date | Mar 26, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2001/388
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for quantitatively and indirectly measuring non-fluorine anti-soil chemistry in carpet applications, is based on a known amount of FI trace to be added along with anti-soil chemistry in formulation prior to application to a carpet surface. The anti-soil chemistry with the trace amount of FI is then applied to the carpet through a topical foam or spray applicator during a precoating process. After completion of the precoat process, a carpet sample is collected, carpet face fiber is shaved, and FI is extracted using water. The extracted water solution is used to measure the fluorescence intensity (in counts per second or “CPS”) using a Fluorimeter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.