Coloring agent with surfactant/emulsifier combination
Agent for oxidative coloring of keratinic fibers comprising a specific combination of non-ionic emulsifiers with a differing degree of ethoxylation and a specific combination of interfacially active substances comprising at least one anionic, at least one zwitterionic and at least one amphoteric surfactant. The agents provide good coloring characteristics while simultaneously protecting against damage to human hair. In particular the agents allow for colors with high color intensity and an improved gray coverage. The agents also provide significant advantages with regard to viscosity stability during storage and use and an improvement in shear sensitivity.
1. Agent for coloring keratinic fibers comprising in a cosmetic carrier:
at least one oxidation dye precursor,
wherein the agent further comprises:
a) at least one non-ionic emulsifier combination comprising at least two ethoxylated, linear fatty alcohols, each having 8 to 22 carbon atoms, at least one of the ethoxylated fatty alcohols having a moderate average degree of ethoxylation of 15 to 35 mol of ethylene oxide and at least one of the ethoxylated fatty alcohols having a high average degree of ethoxylation of 40 to 100 mol of ethylene oxide, and
b) at least one combination of interfacially active substances, containing at least one anionic surfactant, at least one zwitterionic surfactant and at least one amphoteric surfactant.
2. Agent according to claim 1 , wherein the weight ratio of the combination of interfacially active substances of total anionic surfactants to total amphoteric and zwitterionic surfactants is from 3 to 0.3.
3. Agent according to claim 1 , wherein the ethoxylated, linear fatty alcohol having a high average degree of ethoxylation has a high average degree of ethoxylation of 40 to 60.
4. Agent according to claim 1 , wherein the weight ratio of ethoxylated fatty alcohols having a moderate average degree of ethoxylation to ethoxylated fatty alcohols having a high average degree of ethoxylation in the ready-to-use agent is 3:1 to 1:5.
5. Agent according to claim 1 further comprising from 0.005 to 1.0 wt. % of at least one polymeric thickener, based on total weight of the agent.
6. Agent according to claim 5 , wherein the polymeric thickener is a thickening polysaccharide polymer.
7. Agent according to claim 1 further comprising a combination of at least two alkalizing agents,
wherein at least one alkalizing agent is ammonia or an alkanol amine chosen from monoethanolamine, monoisopropanolamine, 2-amino-2-methylpropanol, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-ethyl-1,3-propanediol, 2-amino-2-methylbutanol, 2-aminobutanol, N,N-dimethyl ethanolamine, methylglucamine, triethanolamine, diethanolamine and triisopropanolamine,
and wherein at least one alkalizing agent is a basic amino acid.
8. Agent according to claim 7 , wherein the alkanol amine is monoethanolamine.
9. Agent according to claim 7 , wherein the basic amino acid is chosen from lysine, guanidine, ornithine and arginine.
10. Agent according to claim 1 further comprising at least one substantive dye.
11. Kit of parts comprising:
a container (I) having a coloring agent (A) comprising in a cosmetic carrier at least one oxidation dye precursor, and
a second container (II) packaged separately from container (I) and containing an aqueous oxidizing agent preparation (B) having at least one oxidizing agent,
wherein the coloring agent (A) further comprises:
at least one non-ionic emulsifier combination comprising at least two ethoxylated, linear fatty alcohols, each having 8 to 22 carbon atoms, at least one of the ethoxylated fatty alcohols having a moderate average degree of ethoxylation of 15 to 35 mol of ethylene oxide and at least one of the ethoxylated fatty alcohols having a high average degree of ethoxylation of 40 to 100 mol of ethylene oxide, and
at least one combination of interfacially active substances, containing at least one anionic surfactant, at least one zwitterionic surfactant and at least one amphoteric surfactant.
12. Method for coloring human hair comprising:
mixing the coloring agent (A) and the oxidizing agent preparation (B) of the kit of parts according to claim 11 immediately prior to use thereby producing a coloring agent,
applying the coloring agent to the hair,
leaving the coloring agent on the hair for a contact period of 2 to 30 minutes, and
rinsing the coloring agent out of the hair.
13. Method of improving color intensity when coloring human hair comprising applying an agent according to claim 1 onto the hair.
14. Method of improving gray coverage when coloring human hair comprising applying an agent according to claim 1 onto the hair.