FWA formulation used for the papermaking process
US9181656B2 · kind B2 · utility
0Cited by
4References
1Claims
0Family size
Inventors
Key dates
| Filing date | Nov 6, 2013 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Mar 27, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2211/1096
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A new fluorescent whitening agent (FWA) formulation containing 0.1%-99.9% fluorescent brightener #351 (FB #351) 4,4″-bis(2-sulfostyryl)biphenyl disodium salt (CAS #27344-41-8) and 0.1%-99.9% fluorescent brightener #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.