Hair dye including direct dyes and inorganic buffer systems

Patent metadata

Field	Value
Publication number	US-2017239152-A1
Application number	US-201715435123-A
Country	US
Kind code	A1
Filing date	Feb 16, 2017
Priority date	Feb 22, 2016
Publication date	Aug 24, 2017
Grant date	—

Abstract

Finally, a method for increasing the nuance stability of colorants includes adding the aforementioned ingredients (a), (b), and (c) in the agent.

First claim

What is claimed is:

1 . An agent for coloring keratinic fibers, particularly human hairs, including in a cosmetic carrier
(a) at least one direct dye, (b) an inorganic buffer system comprising at least one inorganic acid (b1) and at least one inorganic salt of this acid or these acids (b2), and (c) water.

2 . The agent as set forth in claim 1 , wherein the at least one direct dye (a) includes at least one anionic direct dye.

3 . The agent as set forth in claim 1 , wherein the at least one direct dye (a) includes at least one selected from the group consisting of Acid Yellow 1, Acid Yellow 3, Acid Yellow 9, Acid Yellow 17, Acid Yellow 23, Acid Yellow 36, Acid Yellow 121, Acid Orange 6, Acid Orange 7, Acid Orange 10, Acid Orange 11, Acid Orange 15, Acid Orange 20, Acid Orange 24, Acid Red 14, Acid Red 18, Acid Red 27, Acid Red 33, Acid Red 35, Acid Red 51, Acid Red 52, Acid Red 73, Acid Red 87, Acid Red 95, Acid Red 184, Acid Red 195, Acid Violet 43, Acid Violet 49, Acid Violet 50, Acid Blue 1, Acid Blue 3, Acid Blue 7, Acid Blue 104, Acid Blue 9, Acid Blue 62, Acid Blue 74, Acid Blue 80, Acid Green 3, Acid Green 5, Acid Green 9, Acid Green 22, Acid Green 25, Acid Green 50, Acid Black 1, Acid Black 52, Food Yellow 8, Food Blue 5, D&C Yellow 7, D&C Yellow 8, D&C Orange 4, D&C Green 5, D&C Orange 10, D&C Orange 11, D&C Red 21, D&C Red 27, D&C Red 33, D&C Violet 2 and D&C Brown 1.

4 . The agent as set forth in claim 1 , wherein the inorganic acid (b1) and the salt or salts of the inorganic acid (b2) are included in a molar ratio (b1)/(b2) of from 1:15 to 15:1.

5 . The agent as set forth in claim 1 , wherein the agent includes—with respect to the total weight of the agent—(b1) one or more inorganic acids in a total quantity from 0.1 to 5.0 wt %.

6 . The agent as set forth in claim 1 , wherein the agent includes—with respect to the total weight of the agent—(b2) one or more salts of the inorganic acid(s) in a total quantity from 0.1 to 5.0 wt %.

7 . The agent as set forth in claim 1 , wherein the inorganic buffer system (b) consists of
(b1)phosphoric acid (H 3 PO 4 ) and (b2) at least one phosphate salt selected from the group consisting of potassium dihydrogen phosphate (KH 2 PO 4 ), sodium dihydrogen phosphate (NaH 2 PO 4 ), dipotassium hydrogen phosphate (K 2 HPO 4 ), disodium hydrogen phosphate (Na 2 HPO 4 ), potassium phosphate (K 3 PO 4 ), and sodium phosphate (Na 3 PO 4 ).

8 . The agent as set forth in claim 1 , wherein the inorganic buffer system (b) consists of
(b1) phosphoric acid (H 3 PO 4 ) and (b2) at least one phosphate salt selected from the group consisting of potassium dihydrogen phosphate (KH 2 PO 4 ) and sodium dihydrogen phosphate (NaH 2 PO 4 ), with the agent that includes the inorganic acid (b1) and the salt or salts of the inorganic acid (b2) being in a molar ratio (b1)/(b2) from 1:5 to 5:1.

9 . The agent as set forth in claim 1 , wherein
(d) a total content of all of the organic carboxylic acids with 1 to 8 C atoms and salts thereof included in the agent—with respect to the total weight of the agent—lies below 0.5 wt %.

10 . The agent as set forth in claim 1 , wherein
(d) a total content of all of the acids from the group of citric acid, lactic acid, malic acid, maleic acid, tartaric acid, glycolic acid, succinic acid, fumaric acid, malonic acid, oxalic acid, mandelic acid and the salts of these acids included in the agent—with respect to the total weight of the agent—lies below 0.5 wt %.

11 . The agent as set forth in claim 1 , wherein the agent has a pH value in the range from 1.0 to 5.5.

12 . The agent as set forth in claim 1 , further including
(e) at least one solvent selected from the group consisting of propylene carbonate, benzyl alcohol, 2-phenoxyethan-1-ol, and benzyl alcohol.

13 . The agent as set forth in claim 1 , wherein the water (c) includes water with a degree of hardness (° dH) of at least 7.3, with the degree of hardness being calculated according to the following formula (mg calcium and magnesium per liter of water):
° dH=0.14×[Ca value in mg/l]+0.23×[Mg value in mg/l].

14 . The agent as set forth in claim 1 , further including
(f) one or more other propellant gases selected from the group consisting of dimethyl ether, propane, propene, n-butane, iso-butane, iso-butene, n-pentane, pentene, iso-pentane, and iso-pentene.

15 . A cosmetic product comprising the cosmetic agent as set forth in claim 1 , which is packed in a pressurized aerosol container, with the pressurized aerosol container having an aerosol dispensing device with spray valve.

16 . A method for increasing the nuance stability of colorants, including
applying to the keratinic fibers a mixture that includes (a) at least one direct dye, and (b) water, mixed with (c) an inorganic buffer system consisting of at least one inorganic acid (b1) and at least one inorganic salt of this acid or these acids (b2).

Assignees

• Henkel Ag & Co Kgaa

Inventors

• Goutsis Konstantin

Classifications

• A61K8/498

  having 6-membered rings or their condensed derivatives, e.g. coumarin · CPC title

• A61K8/046

  Aerosols; Foams · CPC title

• A61K8/24 Primary

  Phosphorous; Compounds thereof · CPC title

• A61Q5/065

  Preparations for temporary colouring the hair, e.g. direct dyes · CPC title

• A61K8/466

  containing sulfonic acid derivatives; Salts · CPC title