Shading process
The present invention relates to a shading process characterized by using a composition comprising a phthalocyanine to which at least one dyestuff is attached through a covalent bonding, to shading compositions, to new compounds used in these shading compositions as well as to the production of these new compounds.
1. A shading process for textile fiber material characterized by treating the textile fiber material with a composition comprising a zinc phthalocyanine bisazo dye conjugate of formula
to which at least one dyestuff is attached through covalent bonding.
2. A process according to claim 1 , wherein the composition comprising the zinc phthalocyanine bisazo dye conjugate produces a relative hue angle of 220°-320° and is not light stable.
3. A process according to claim 2 , wherein the decrease rate of the zinc phthalocyanine bisazo dye conjugate is at least 1% per 2 hours, preferably at least 2% when the composition is exposed to (sun)light.
4. A shading process according to claim 1 , wherein the shading process is part of a laundry washing process.
5. A shading composition comprising the zinc phthalocyanine bisazo dye conjugate according to claim 1 .
6. A shading composition according to claim 5 in the form of a granule comprising
a) from 2 to 75% by weight (wt-%) of at least one shading composition (A) and/or (A″) as defined in claim 5 , based on the total weight of the granulate,
b) from 10 to 95 wt-% of at least one further additive, based on the total weight of the granulate, and
c) from 0 to 15 wt-% water, based on the total weight of the granulate.
7. A shading composition according to claim 5 in liquid form comprising
(a) 0.01-95 wt-%, of at least one shading composition (A) and/or (A″) as defined in claim 5 , based on the total weight of the liquid formulation,
(b) 5-99.99 wt %, based on the total weight of the liquid formulation, of at least one organic solvent and
(c) 0-10 wt-%, based on the total weight of the liquid formulation, of at least one further additive.
8. The zinc phthalocyanine bisazo dye conjugate according to claim 1 to which at least one dyestuff is attached through covalent bonding.
9. A shading composition according to claim 5 in liquid form comprising
(a) 1-80 wt-% of the shading composition (A), based on the total weight of the liquid formulation
(b) 20-99 wt-%, based on the total weight of the liquid formulation, of at least one organic solvent and
(c) 0-5 wt-%, based on the total weight of the liquid formulation, of at least one further additive.