Aqueous solutions of optical brighteners

Details Aqueous solutions of optical brighteners Aqueous solutions of optical brighteners

C - Chemistry, Metallurgy

08

K

C08K 5/42 (2006.01) C08L 29/04 (2006.01) D21H 21/30 (2006.01)

Patent

CA 2659540

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'alcool polyvinylique/azurant optique stables au stockage et à faible viscosité qui peuvent être utilisées directement par le fabricant de papier, car elles permettent un dosage par pompe directement dans une composition de couchage, et qui fournissent des papiers couchés d'une blancheur étonnamment élevée.

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