Fluorescent brighter #71 used for the papermaking process
US9109331B2 · kind B2 · utility
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2Claims
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Inventors
Key dates
| Filing date | Nov 7, 2013 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Nov 7, 2033 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/07
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Fluorescent whitening agent 71 (FB #71) 4,4′-bis[4-anilino-6-morpholino-1,3,5-triazin-2-yl]amino-2,2′-stilbene disodium salt (CAS #16090-02-1) is used on the wet-end papermaking process and coating papermaking process to increase the brightness of paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.