Aqueous solutions of optical brighteners

Details Aqueous solutions of optical brighteners Aqueous solutions of optical brighteners

C - Chemistry, Metallurgy

08

L

C08L 29/04 (2006.01) C08K 5/00 (2006.01) D21H 21/30 (2006.01)

Patent

CA 2655454

The instant invention relates to storage stable aqueous optical brightener/PVOH solutions of low viscosity which may be used directly by the papermaker, in that they can be metered by pump directly into a coating composition, and which provide coated papers of a surprisingly high whiteness

La présente invention concerne des solutions aqueuses d'azurant optique/ d'alcool polyvinylique (PVOH) stables lors du stockage et de faible viscosité. Les solutions peuvent être directement utilisées par le fabricant de papier en ce sens qu'elles peuvent être dosées à l'aide d'une pompe directement dans une composition de revêtement et elles produisent des papiers revêtus d'une blancheur étonnamment éclatante.

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