Automated reactor endpointing of platy interference effect pigments
US6999167B2 · kind B2 · utility
1Cited by
15References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2001 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Dec 15, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/0346
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and a method for objectively ascertaining a color match between a selected standard color and the color exhibited by an interference effect pigment during processing thereof and terminating the process upon achieving a match. The invention provides a spectrophotometer attached to a flow cell to monitor the color of a platy effect pigment to monitor pigment color and ascertain completion of the coating reaction process involved in interference pigment production.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.