Improvements relating to optical brightening agents

Details Improvements relating to optical brightening agents Improvements relating to optical brightening agents

C - Chemistry, Metallurgy

07

D

C07D 251/68 (2006.01)

Patent

CA 2562777

The instant invention relates to stilbene optical brightening agents which combine a high solubility in water while providing superior fluorescent whitening effects when applied to the surface of paper in either the size- press or in a pigmented coating composition and which show a reduced anionic charge. The instant optical brighteners may also be used for finishing of textiles.

La présente invention concerne des agents d'azurage optiques stilbène qui combinent une haute solubilité dans l'eau et un effet blanchissant fluorescent supérieur lorsque qu'on les applique sur la surface d'un papier dans une presse encolleuse ou dans une composition de revêtement pigmentée et, qui présente une charge anionique réduite. Ces agents d'azurage optiques peuvent aussi être utilisés pour la finition de textiles.

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