Disazo dyes, and copper complexes thereof, for dyeing paper

Details Disazo dyes, and copper complexes thereof, for dyeing paper Disazo dyes, and copper complexes thereof, for dyeing paper

C - Chemistry, Metallurgy

09

B

C09B 35/029 (2006.01) C09B 35/039 (2006.01) C09B 35/35 (2006.01) C09B 45/28 (2006.01) C09B 67/22 (2006.01) D21H 21/28 (2006.01)

Patent

CA 2431043

The dyes of formula (1) according to claim 1 and the copper complexes of dyes of formula (2) according to claim 9 or the mixtures of mono-copper complex with the bis-copper complex are excellently suitable for dyeing paper with good light-fastness properties.

L'invention concerne des colorants de formule (I), selon la revendication 1, ainsi que les complexes de colorants de formule (2) avec le cuivre, selon la revendication 9, ou des mélanges du complexe monométallique et du complexe bimétallique avec le cuivre, qui conviennent parfaitement à la coloration du papier avec de bonnes propriétés de résistance à la lumière.

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