Odor suppressant

Abstract

To provide an agent that inhibits an unpleasant odor derived from an amine, which arises when using a hair dye or a bleaching composition containing alkanolamine as an alkaline agent, while not containing ammonia and ammonium salts.SOLUTION: The present invention provides an agent that inhibits an unpleasant odor arising when using a hair dye or a leaching composition containing alkanolamine as an alkaline agent, while not containing ammonia and ammonium salts. The unpleasant odor inhibitor is (A) hydroxyethane diphosphonic acid. The content of the component (A) is 0.001-1 mass% relative to the hair dye or the bleaching composition.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an unpleasant odor inhibitor during the use of a hair dye or hair bleaching agent composition that contains an alkanolamine as an alkali agent and does not contain ammonia and ammonium salts. More specifically, it relates to an unpleasant odor inhibitor for amines during the use of a hair dye or hair bleaching agent composition that contains an alkanolamine as an alkali agent and does not contain ammonia and ammonium salts.

[0002] Due to the increasing fashion awareness in recent years, hair coloring agents that can easily change hair color are accepted by many people, regardless of gender. There are various types of hair coloring agents, such as permanent hair dyes, semi-permanent hair dyes, hair bleaching agents, and temporary coloring agents, which are used according to different needs. Among them, permanent hair dyes and hair bleaching agents are excellent in hair dyeing and bleaching effects, and are currently widely used hair coloring agents because of these characteristics.

[0003] Permanent hair dyes and hair bleaching agents of hair coloring agents are generally composed of a first agent containing an alkali agent and a second agent containing an oxidizing agent. Ammonia is used as a common alkali agent used in the first agent. However, ammonia has a strong pungent odor and has the drawback of being accompanied by an unpleasant feeling of the pungent odor during use.

[0004] To solve the above problems, Patent Document 1 discloses a hair treatment composition in which the proportion of a predetermined component that stimulates the sense of smell in each component of the hair treatment composition, which consists of an alkaline agent, a base material, and a reducing agent, is selected from those below the olfactory perception limit, thereby preventing unpleasant odors. Furthermore, Patent Document 2 discloses a hair dye composition in which a first agent containing an alkaline agent and a second agent containing an oxidizing agent are mixed, and which contains an organic solvent, a polyoxyalkylene compound, a lower alcohol or polyhydric alcohol, but does not contain ammonia, resulting in less irritating odor and excellent hair bleaching and dyeing power. Both Patent Document 1 and Patent Document 2 solve the problem of the irritating odor characteristic of ammonia by containing an alkanolamine, which has no irritating odor, instead of ammonia and ammonium salts as the alkaline agent. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2003-146847 [Patent Document 2] Japanese Patent Publication No. 2004-217672 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] However, while Patent Documents 1 and 2 examined the suppression of unpleasant odors by the hair dye composition itself, they did not examine the unpleasant odors of amines derived from alkanolamines when used for hair dyeing or bleaching.

[0007] Therefore, the present invention has been made in view of the above problems, and relates to an unpleasant odor suppressant that suppresses the unpleasant odor of amines when using a hair dye or bleaching agent composition containing an alkanolamine as an alkaline agent and not containing ammonia and ammonium salts. [Means for solving the problem]

[0008] The present inventors have found that the above problem can be solved by using an odor-suppressing agent for hair dyes or bleaching agents containing an alkanolamine as an alkaline agent and not containing ammonia or ammonium salts, and by using (A) hydroxyethanediphosphonic acid as the odor-suppressing agent, thus completing the present invention.

[0009] In other words, the present invention provides an unpleasant odor suppressant for use in a hair dye or bleaching agent composition that contains an alkanolamine as an alkaline agent and does not contain ammonia and ammonium salts, wherein the unpleasant odor suppressant is (A) hydroxyethanediphosphonic acid, and the content of component (A) in the hair dye or bleaching agent composition is 0.001 to 1% by mass. [Effects of the Invention]

[0010] The present invention makes it possible to suppress the unpleasant odor of amines when using a hair dye or bleaching agent composition that contains an alkanolamine as an alkaline agent and does not contain ammonia or ammonium salts. [Modes for carrying out the invention]

[0011] The present invention will be described in detail below. Unless otherwise specified, all units indicating content are in mass percent.

[0012] In this invention, "unpleasant odor" refers to the odor of amines.

[0013] In the present invention, "when in use" means the state in which the hair dye or bleaching agent composition is being applied to the hair to dye or bleach it.

[0014] The hair dye or bleaching agent composition in the present invention is a mixture of a first agent containing an alkaline agent and a second agent containing an oxidizing agent.

[0015] The alkaline agent in the present invention is an alkanolamine.

[0016] The alkanolamine in the present invention is not particularly limited, but examples include monoethanolamine, diethanolamine, triethanolamine, monopropanolamine, isopropanolamine, dipropanolamine, trippropanolamine, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-methyl-1-propanol, 2-amino-2-hydroxymethyl-1,3-propanediol, and one or more of these may be included.

[0017] The alkaline agent in the present invention does not contain ammonia and ammonium salts.

[0018] Examples of ammonium salts in the present invention include ammonium carbonate, ammonium bicarbonate, ammonium bicarbonate, ammonium sulfate, ammonium phosphate, and ammonium nitrate as ammonium salts of inorganic acids, and ammonium citrate, ammonium acetate, ammonium oxalate, and ammonium tartrate as ammonium salts of organic acids.

[0019] The oxidizing agent in the present invention is not particularly limited, but examples include hydrogen peroxide, urea peroxide, melamine peroxide, sodium percarbonate, potassium percarbonate, sodium perborate, potassium perborate, ammonium persulfate, sodium peroxide, potassium peroxide, magnesium peroxide, barium peroxide, calcium peroxide, strontium peroxide, hydrogen peroxide adducts of peroxides, hydrogen peroxide adducts of phosphates, hydrogen peroxide adducts of pyrophosphates, sodium bromate, etc., and one or more of these may be included.

[0020] The hair dye or hair bleaching agent composition of the present invention can contain at least one or more selected from various components used in ordinary cosmetics, quasi-drugs, pharmaceuticals, etc., for example, other surfactants, oily components, humectants, thickeners, medicinal components, protein derivatives, hydrolyzed proteins, amino acids, stabilizers, antioxidants, plant extracts, crude drug extracts, vitamins, fragrances, preservatives, pigments, pigments, powders, pH adjusters, ultraviolet absorbers, antioxidants, fragrances, etc.

[0021] The dosage forms of the hair dye or hair bleaching agent composition of the present invention include emulsion form, cream form, gel cream form, foam form, aerosol foam form, etc.

[0022] The unpleasant odor inhibitor used in the present invention can be contained in either one or both of the first agent and the second agent of the hair dye or hair bleaching agent composition.

[0023] [[ID=I12]]The unpleasant odor inhibitor used in the present invention can be used in combination of one or more components.

[0024] The unpleasant odor inhibitor of the hair dye or hair bleaching agent composition in the present invention is (A) hydroxyethanediphosphonic acid from the viewpoint of suppressing unpleasant odor.

[0025] The content of the (A) component used in the hair dye or hair bleaching agent composition of the present invention is preferably 0.001 to 1%, more preferably 0.05 to 1%, and even more preferably 0.5 to 1%. When the content of the (A) component is less than 0.001%, there is a risk that unpleasant odor cannot be suppressed. When the content of the (A) component exceeds 1%, it becomes difficult to obtain further effects.

[0026] The unpleasant odor inhibitor of the hair dye or hair bleaching agent composition in the present invention may further be combined with (B) potassium alum from the viewpoint of improving the suppression of unpleasant odor.

[0027] The potassium alum used in the present invention refers to chemical name: potassium aluminum sulfate.

[0028] The content of component (B) used in the present invention in the hair dye or bleaching agent composition is not particularly limited, but is preferably 0.01 to 2%, and more preferably 0.5 to 2%. If the content of component (B) is less than 0.01%, there is a risk that unpleasant odors will not be suppressed. If the content of component (B) exceeds 2%, it will be difficult to obtain any further effect. [Examples]

[0029] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

[0030] In the evaluation tests described herein, hair dye compositions were prepared and tested by varying the content of the odor inhibitors shown in Tables 3 and 4 in the first and second hair dye compositions shown in Tables 1 and 2. The first and second hair dye compositions were mixed in a 1:1 ratio, with the odor inhibitor (component A) included in the second hair dye composition shown in Table 2, and the odor inhibitor (component B) included in the first hair dye composition shown in Table 1. The portions of the first and second hair dye compositions containing components (A) and (B) were adjusted with purified water to 100%. All unit indicating the content of each component is mass%, and these were prepared by conventional methods.

[0031] [Test methods for unpleasant odors of amines] One g of a hair dye composition containing the odor-suppressing agents shown in Tables 3 and 4 was applied to a bundle of human hair (Beaulux Co., Ltd., 100% black human hair (1 g x 10 cm)), and immediately combed through the bundle 20 times on both sides to ensure uniformity. The bundle of hair coated with the odor-suppressing agents was placed in a beaker (IWAKI, 500 ml beaker, outer diameter 90 mm x height 125 mm), the top of the beaker was sealed with DuraSeal (DS4-500), and left for 10 minutes to react with the human hair bundle. Then, adhesive tape (Nitto Denko CS Systems Co., Ltd., cloth adhesive tape No. 770) was applied over the DuraSeal to prevent it from tearing, and the tip of a detector tube was inserted into the center of the top of the beaker so that it was 3 cm above the top of the beaker. The handle of a detector tube gas analyzer was operated to aspirate the gas and measure the concentration of amines.

[0032] The type of detector tube, the type of detector tube gas analyzer, and the measurement conditions for amines using them are as follows: • Detector tube: Gastec Co., Ltd., No. 180 • Detector tube type gas detector: Gastec Co., Ltd., GV-100 • Measurement conditions Number of suctions: 1 Suction volume 100mL Suction time 30 seconds

[0033] [Sensory evaluation of unpleasant odors during use] (Test method) Hair dye compositions containing the first and second hair dye compositions shown in Tables 1 and 2, along with the odor suppressants shown in Tables 3 and 4, were used to dye hair using the odor testing method for amines. Ten minutes after dyeing, the odor in the beaker was evaluated by 15 expert panelists using Comparative Example 1 as a baseline, and evaluated according to the following criteria.

[0034] (Evaluation Criteria) ◎: 10 to 15 people rated that they did not perceive an unpleasant odor compared to Comparative Example 1. ○: 5 to 9 people rated that they did not perceive an unpleasant odor compared to Comparative Example 1. ×: Compared to Comparative Example 1, four or fewer people rated that they did not perceive an unpleasant odor.

[0035] Table 1 lists the first hair dye composition, and Table 2 lists the second hair dye composition. [Table 1]

[0036] [Table 2]

[0037] Examples 1 to 10 in Tables 3 and 4 showed better results in suppressing unpleasant odors from amines compared to Comparative Examples 1 to 3.

[0038] [Table 3]

[0039] [Table 4] [Industrial applicability]

[0040] The present invention provides an odor suppressant that suppresses the unpleasant odor of amines when using a hair dye or bleaching agent composition containing an alkanolamine as an alkaline agent and not containing ammonia or ammonium salts.

Claims

[Claim 1] An odor-suppressing agent for use in a hair dye or bleaching agent composition containing an alkanolamine as an alkaline agent and not containing ammonia and ammonium salts, wherein the odor-suppressing agent is (A) hydroxyethanediphosphonic acid and (B) potassium alum, and the content of component (A) in the hair dye or bleaching agent composition is 0.05 to 1% by mass, and the content of component (B) is 0.5 to 2% by mass.

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