Aqueous dispersions of optical brighteners

Details Aqueous dispersions of optical brighteners Aqueous dispersions of optical brighteners

C - Chemistry, Metallurgy

09

K

C09K 11/06 (2006.01) D21H 21/30 (2006.01)

Patent

CA 2585385

The instant invention relates to aqueous dispersions of one or more optical brightening agent (OBA) which do not need dispersants or other stabilizing additives in order to avoid sedimentation during storage. The optical brighteners are sulfonated triazinylaminostilbene compounds which have excellent properties for whitening of paper and other cellulosic substrates.

La présente invention porte sur des dispersions aqueuses d'un ou plusieurs azurants optiques (OBA) qui n'ont pas besoin d'agents dispersants ou autres additifs stabilisants pour éviter la sédimentation pendant le stockage. Les azurants optiques sont des composés de triazinylaminostilbène sulfonés qui présentent d'excellentes propriétés de blanchiment du papier et d'autres substrats cellulosiques.

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