Alkanolammonium-containing triazinyl flavonate whiteners

Details Alkanolammonium-containing triazinyl flavonate whiteners Alkanolammonium-containing triazinyl flavonate whiteners

2005-07-22

2009-10-27

Hug, Eric (Department: 1791)

Paper making and fiber liberation

Processes and products

Non-fiber additive

C162S135000, C162S158000, C162S184000, C427S158000, C252S301230

Reexamination Certificate

active

07608168

ABSTRACT:
A process for whitening paper in a size press includes contacting a cellulose sheet with a size press liquor that contains a surface size and a particular whitener containing sulfonate groups and cations, M, wherein at least 10% of all cations M have the formulain which R5to R7, independently of one another, denote hydrogen, a C1-C4-alkyl radical or an optionally further substituted C2-C4-hydroxyalkyl radical, and R8denotes an optionally further substituted C2-C4-hydroxyalkyl radical. The process provides superior paper whitening compared to a corresponding process in which the whitener cations are all sodium or potassium ions.

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European Search Report; EP1624105A1; Nov. 16, 2005; 2 pages.

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