Dyes and blends for shading during laundry
AssigneeBASF SE
InventorsCarmen Araya Hernandez, Frank Bachmann, Hans Kramer, Wolfgang Schlenker, Deepak M. Rane
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Abstract
The present invention relates to a laundry shading process with specific blue or violet bisazo-dyes alone or in combination with a photocatalyst. Further aspects of the invention are a composition comprising at least one photocatalyst and at least one of the specific bisazo-dyes. The composition is particularly useful for shading textiles during laundry. Further aspects of the invention are a detergent composition, a fabric softener composition containing these dyes or mixtures of these dyes and photocatalysts and novel blue or violet bisazo-dyes.
Claims15
A shading process for textile fabrics or fibres which process comprises applying a bis-azo-dye of formulae (I), (II) or (III) to the fabric or fibre in a laundry process
- wherein
- a is 0, 1 or 2;
- b is 0 or 1;
- c is 0 or 1;
- d is 0 or 1;
- A is CH3 or SO3X
- X is H, Na or K and
- R is a group
- wherein the arrows indicates the points of attachment;
- with the proviso that in formula (I) R is other than the group R2 if a is 1 and b is 0.
A shading process for textile fabrics or fibres which process comprises applying a photocatalyst which is a water-soluble phthalocyanine of Zn, Fe(II), Ca, Mg, Na, K, Al, Si(IV), P(V), Ti(IV), Ge(IV), Cr(VI), Ga(III), Zr(IV), In(III), Sn(IV) or Hf(VI) and a bis-azo-dye of formulae (I), (II) or (III) to the fabric or fibre in a laundry process
- wherein
- a is 0, 1 or 2;
- b is 0 or 1;
- c is 0 or 1;
- d is 0 or 1;
- A is CH3 or SO3X
- X is H, Na or K and
- R is a group
- wherein the arrows indicates the points of attachment.
A composition comprising
- a) A bis-azo-dye of formulae (I), (II) or (III)
- wherein
- a is 0, 1 or 2;
- b is 0 or 1;
- c is 0 or 1;
- d is 0 or 1;
- A is CH3 or SO3X
- X is H, Na or K and
- R is a group
- wherein the arrows indicate the points of attachment, and
- b) A water-soluble phthalocyanine of Zn, Fe(II), Ca, Mg, Na, K, Al, Si(IV), P(V), Ti(IV), Ge(IV), Cr(VI), Ga(III), Zr(IV), In(III), Sn(IV) or Hf(VI).
A bis-azo-dye selected from the group consisting of the following compounds of examples
Dependencies are inferred from the claim text.