Hair dye having improved viscosity stability
AssigneeHenkel AG & Co. KGaA
InventorsKonstantin Goutsis, Daniela Kessler-Becker
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Abstract
The present application relates to agents for dyeing keratin fibers, in particular human hair, exemplified in that said agents are produced by mixing (A) one or more oxidation dye precursors in salt form and (B) one or more water-soluble salts of barium and/or of calcium, wherein the molar ratio of all oxidation dye precursors in salt form (A) used in the agent to all water-soluble barium and calcium salts (B) used in the agent. i.e. the molar ratio (A)/(B), lies at a value of from about 1.0 to about 1.4.
Claims15
An agent for dyeing keratin fibers wherein it is produced by mixing:
- (A) one or more oxidation dye precursors in salt form, and
- (B) one or more water-soluble salts of barium and/or of calcium,
- wherein the molar ratio of all oxidation dye precursors in salt form (A) used in the agent to all water-soluble barium and calcium salts (B) used in the agent is from about 1.0 to about 1.4, and
- wherein the one or more water-soluble salts of barium and/or of calcium is selected from the group of barium hydroxide, calcium hydroxide, and a combination thereof.
A method for producing an agent for dyeing keratin fibers, comprising the following steps:
- (a) providing a cosmetic base formulation,
- (b) incorporating one or more oxidation dye precursors in salt form (A) into the base formulation, and
- (c) incorporating one or more water-soluble salts of barium and/or of calcium (B) into the base formulation,
- wherein the molar ratio of all oxidation dye precursors in salt form (A) used in the base formulation to all water-soluble barium and calcium salts (B) used in the base formulation is from about 1.0 to about 1.4, and
- wherein the one or more water-soluble salts of barium and/or of calcium (B) is selected from the group of barium hydroxide, calcium hydroxide, and a combination thereof.
An agent for dyeing keratin fibers wherein it is produced by mixing:
- (A) one or more oxidation dye precursors in salt form, and
- (B) one or more water-soluble salts of barium and/or of calcium,
- wherein the molar ratio of all oxidation dye precursors in salt form (A) used in the agent to all water-soluble barium and calcium salts (B) used in the agent is from about 1.0 to about 1.4, wherein the agent comprises or is produced by mixing:
- (A) p-toluene diamine sulfate, and
- (B) barium hydroxide,
- wherein the molar ratio of p-toluene diamine sulfate (A) used in the agent to barium hydroxide (B) used in the agent is from about 1.0 to about 1.4.
Dependencies are inferred from the claim text.